drivers/video/omap/blizzard.c

   1 /*
   2  * Epson Blizzard LCD controller driver
   3  *
   4  * Copyright (C) 2004-2005 Nokia Corporation
   5  * Authors:     Juha Yrjola   <juha.yrjola@nokia.com>
   6  *              Imre Deak     <imre.deak@nokia.com>
   7  * YUV support: Jussi Laako   <jussi.laako@nokia.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License as published by the
  11  * Free Software Foundation; either version 2 of the License, or (at your
  12  * option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22  */
  23 #include <linux/module.h>
  24 #include <linux/mm.h>
  25 #include <linux/fb.h>
  26 #include <linux/delay.h>
  27 #include <linux/clk.h>
  28
  29 #include <mach/dma.h>
  30 #include <mach/omapfb.h>
  31 #include <mach/blizzard.h>
  32
  33 #include "dispc.h"
  34
  35 #define MODULE_NAME                             "blizzard"
  36
  37 #define BLIZZARD_REV_CODE                       0x00
  38 #define BLIZZARD_CONFIG                         0x02
  39 #define BLIZZARD_PLL_DIV                        0x04
  40 #define BLIZZARD_PLL_LOCK_RANGE                 0x06
  41 #define BLIZZARD_PLL_CLOCK_SYNTH_0              0x08
  42 #define BLIZZARD_PLL_CLOCK_SYNTH_1              0x0a
  43 #define BLIZZARD_PLL_MODE                       0x0c
  44 #define BLIZZARD_CLK_SRC                        0x0e
  45 #define BLIZZARD_MEM_BANK0_ACTIVATE             0x10
  46 #define BLIZZARD_MEM_BANK0_STATUS               0x14
  47 #define BLIZZARD_PANEL_CONFIGURATION            0x28
  48 #define BLIZZARD_HDISP                          0x2a
  49 #define BLIZZARD_HNDP                           0x2c
  50 #define BLIZZARD_VDISP0                         0x2e
  51 #define BLIZZARD_VDISP1                         0x30
  52 #define BLIZZARD_VNDP                           0x32
  53 #define BLIZZARD_HSW                            0x34
  54 #define BLIZZARD_VSW                            0x38
  55 #define BLIZZARD_DISPLAY_MODE                   0x68
  56 #define BLIZZARD_INPUT_WIN_X_START_0            0x6c
  57 #define BLIZZARD_DATA_SOURCE_SELECT             0x8e
  58 #define BLIZZARD_DISP_MEM_DATA_PORT             0x90
  59 #define BLIZZARD_DISP_MEM_READ_ADDR0            0x92
  60 #define BLIZZARD_POWER_SAVE                     0xE6
  61 #define BLIZZARD_NDISP_CTRL_STATUS              0xE8
  62
  63 /* Data source select */
  64 /* For S1D13745 */
  65 #define BLIZZARD_SRC_WRITE_LCD_BACKGROUND       0x00
  66 #define BLIZZARD_SRC_WRITE_LCD_DESTRUCTIVE      0x01
  67 #define BLIZZARD_SRC_WRITE_OVERLAY_ENABLE       0x04
  68 #define BLIZZARD_SRC_DISABLE_OVERLAY            0x05
  69 /* For S1D13744 */
  70 #define BLIZZARD_SRC_WRITE_LCD                  0x00
  71 #define BLIZZARD_SRC_BLT_LCD                    0x06
  72
  73 #define BLIZZARD_COLOR_RGB565                   0x01
  74 #define BLIZZARD_COLOR_YUV420                   0x09
  75
  76 #define BLIZZARD_VERSION_S1D13745               0x01    /* Hailstorm */
  77 #define BLIZZARD_VERSION_S1D13744               0x02    /* Blizzard */
  78
  79 #define BLIZZARD_AUTO_UPDATE_TIME               (HZ / 20)
  80
  81 /* Reserve 4 request slots for requests in irq context */
  82 #define REQ_POOL_SIZE                   24
  83 #define IRQ_REQ_POOL_SIZE               4
  84
  85 #define REQ_FROM_IRQ_POOL 0x01
  86
  87 #define REQ_COMPLETE    0
  88 #define REQ_PENDING     1
  89
  90 struct blizzard_reg_list {
  91         int     start;
  92         int     end;
  93 };
  94
  95 /* These need to be saved / restored separately from the rest. */
  96 static struct blizzard_reg_list blizzard_pll_regs[] = {
  97         {
  98                 .start  = 0x04,         /* Don't save PLL ctrl (0x0C) */
  99                 .end    = 0x0a,
 100         },
 101         {
 102                 .start  = 0x0e,         /* Clock configuration */
 103                 .end    = 0x0e,
 104         },
 105 };
 106
 107 static struct blizzard_reg_list blizzard_gen_regs[] = {
 108         {
 109                 .start  = 0x18,         /* SDRAM control */
 110                 .end    = 0x20,
 111         },
 112         {
 113                 .start  = 0x28,         /* LCD Panel configuration */
 114                 .end    = 0x5a,         /* HSSI interface, TV configuration */
 115         },
 116 };
 117
 118 static u8 blizzard_reg_cache[0x5a / 2];
 119
 120 struct update_param {
 121         int     plane;
 122         int     x, y, width, height;
 123         int     out_x, out_y;
 124         int     out_width, out_height;
 125         int     color_mode;
 126         int     bpp;
 127         int     flags;
 128 };
 129
 130 struct blizzard_request {
 131         struct list_head entry;
 132         unsigned int     flags;
 133
 134         int              (*handler)(struct blizzard_request *req);
 135         void             (*complete)(void *data);
 136         void             *complete_data;
 137
 138         union {
 139                 struct update_param     update;
 140                 struct completion       *sync;
 141         } par;
 142 };
 143
 144 struct plane_info {
 145         unsigned long offset;
 146         int pos_x, pos_y;
 147         int width, height;
 148         int out_width, out_height;
 149         int scr_width;
 150         int color_mode;
 151         int bpp;
 152 };
 153
 154 struct blizzard_struct {
 155         enum omapfb_update_mode update_mode;
 156         enum omapfb_update_mode update_mode_before_suspend;
 157
 158         struct timer_list       auto_update_timer;
 159         int                     stop_auto_update;
 160         struct omapfb_update_window     auto_update_window;
 161         int                     enabled_planes;
 162         int                     vid_nonstd_color;
 163         int                     vid_scaled;
 164         int                     last_color_mode;
 165         int                     zoom_on;
 166         int                     zoom_area_gx1;
 167         int                     zoom_area_gx2;
 168         int                     zoom_area_gy1;
 169         int                     zoom_area_gy2;
 170         int                     screen_width;
 171         int                     screen_height;
 172         unsigned                te_connected:1;
 173         unsigned                vsync_only:1;
 174
 175         struct plane_info       plane[OMAPFB_PLANE_NUM];
 176
 177         struct blizzard_request req_pool[REQ_POOL_SIZE];
 178         struct list_head        pending_req_list;
 179         struct list_head        free_req_list;
 180         struct semaphore        req_sema;
 181         spinlock_t              req_lock;
 182
 183         unsigned long           sys_ck_rate;
 184         struct extif_timings    reg_timings, lut_timings;
 185
 186         u32                     max_transmit_size;
 187         u32                     extif_clk_period;
 188         int                     extif_clk_div;
 189         unsigned long           pix_tx_time;
 190         unsigned long           line_upd_time;
 191
 192         struct omapfb_device    *fbdev;
 193         struct lcd_ctrl_extif   *extif;
 194         struct lcd_ctrl         *int_ctrl;
 195
 196         void                    (*power_up)(struct device *dev);
 197         void                    (*power_down)(struct device *dev);
 198
 199         int                     version;
 200 } blizzard;
 201
 202 struct lcd_ctrl blizzard_ctrl;
 203
 204 static u8 blizzard_read_reg(u8 reg)
 205 {
 206         u8 data;
 207
 208         blizzard.extif->set_bits_per_cycle(8);
 209         blizzard.extif->write_command(&reg, 1);
 210         blizzard.extif->read_data(&data, 1);
 211
 212         return data;
 213 }
 214
 215 static void blizzard_write_reg(u8 reg, u8 val)
 216 {
 217         blizzard.extif->set_bits_per_cycle(8);
 218         blizzard.extif->write_command(&reg, 1);
 219         blizzard.extif->write_data(&val, 1);
 220 }
 221
 222 static void blizzard_restart_sdram(void)
 223 {
 224         unsigned long tmo;
 225
 226         blizzard_write_reg(BLIZZARD_MEM_BANK0_ACTIVATE, 0);
 227         udelay(50);
 228         blizzard_write_reg(BLIZZARD_MEM_BANK0_ACTIVATE, 1);
 229         tmo = jiffies + msecs_to_jiffies(200);
 230         while (!(blizzard_read_reg(BLIZZARD_MEM_BANK0_STATUS) & 0x01)) {
 231                 if (time_after(jiffies, tmo)) {
 232                         dev_err(blizzard.fbdev->dev,
 233                                         "s1d1374x: SDRAM not ready\n");
 234                         break;
 235                 }
 236                 msleep(1);
 237         }
 238 }
 239
 240 static void blizzard_stop_sdram(void)
 241 {
 242         blizzard_write_reg(BLIZZARD_MEM_BANK0_ACTIVATE, 0);
 243 }
 244
 245 /* Wait until the last window was completely written into the controllers
 246  * SDRAM and we can start transferring the next window.
 247  */
 248 static void blizzard_wait_line_buffer(void)
 249 {
 250         unsigned long tmo = jiffies + msecs_to_jiffies(30);
 251
 252         while (blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS) & (1 << 7)) {
 253                 if (time_after(jiffies, tmo)) {
 254                         if (printk_ratelimit())
 255                                 dev_err(blizzard.fbdev->dev,
 256                                         "s1d1374x: line buffer not ready\n");
 257                         break;
 258                 }
 259         }
 260 }
 261
 262 /* Wait until the YYC color space converter is idle. */
 263 static void blizzard_wait_yyc(void)
 264 {
 265         unsigned long tmo = jiffies + msecs_to_jiffies(30);
 266
 267         while (blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS) & (1 << 4)) {
 268                 if (time_after(jiffies, tmo)) {
 269                         if (printk_ratelimit())
 270                                 dev_err(blizzard.fbdev->dev,
 271                                         "s1d1374x: YYC not ready\n");
 272                         break;
 273                 }
 274         }
 275 }
 276
 277 static void disable_overlay(void)
 278 {
 279         blizzard_write_reg(BLIZZARD_DATA_SOURCE_SELECT,
 280                                 BLIZZARD_SRC_DISABLE_OVERLAY);
 281 }
 282
 283 static void set_window_regs(int x_start, int y_start, int x_end, int y_end,
 284                             int x_out_start, int y_out_start,
 285                             int x_out_end, int y_out_end, int color_mode,
 286                             int zoom_off, int flags)
 287 {
 288         u8 tmp[18];
 289         u8 cmd;
 290
 291         x_end--;
 292         y_end--;
 293         tmp[0] = x_start;
 294         tmp[1] = x_start >> 8;
 295         tmp[2] = y_start;
 296         tmp[3] = y_start >> 8;
 297         tmp[4] = x_end;
 298         tmp[5] = x_end >> 8;
 299         tmp[6] = y_end;
 300         tmp[7] = y_end >> 8;
 301
 302         x_out_end--;
 303         y_out_end--;
 304         tmp[8]  = x_out_start;
 305         tmp[9]  = x_out_start >> 8;
 306         tmp[10] = y_out_start;
 307         tmp[11] = y_out_start >> 8;
 308         tmp[12] = x_out_end;
 309         tmp[13] = x_out_end >> 8;
 310         tmp[14] = y_out_end;
 311         tmp[15] = y_out_end >> 8;
 312
 313         tmp[16] = color_mode;
 314         if (zoom_off && blizzard.version == BLIZZARD_VERSION_S1D13745)
 315                 tmp[17] = BLIZZARD_SRC_WRITE_LCD_BACKGROUND;
 316         else if (flags & OMAPFB_FORMAT_FLAG_ENABLE_OVERLAY)
 317                 tmp[17] = BLIZZARD_SRC_WRITE_OVERLAY_ENABLE;
 318         else
 319                 tmp[17] = blizzard.version == BLIZZARD_VERSION_S1D13744 ?
 320                                 BLIZZARD_SRC_WRITE_LCD :
 321                                 BLIZZARD_SRC_WRITE_LCD_DESTRUCTIVE;
 322
 323         blizzard.extif->set_bits_per_cycle(8);
 324         cmd = BLIZZARD_INPUT_WIN_X_START_0;
 325         blizzard.extif->write_command(&cmd, 1);
 326         blizzard.extif->write_data(tmp, 18);
 327 }
 328
 329 static void enable_tearsync(int y, int width, int height, int screen_height,
 330                             int out_height, int force_vsync)
 331 {
 332         u8 b;
 333
 334         b = blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS);
 335         b |= 1 << 3;
 336         blizzard_write_reg(BLIZZARD_NDISP_CTRL_STATUS, b);
 337
 338         if (likely(blizzard.vsync_only || force_vsync)) {
 339                 blizzard.extif->enable_tearsync(1, 0);
 340                 return;
 341         }
 342
 343         if (width * blizzard.pix_tx_time < blizzard.line_upd_time) {
 344                 blizzard.extif->enable_tearsync(1, 0);
 345                 return;
 346         }
 347
 348         if ((width * blizzard.pix_tx_time / 1000) * height <
 349             (y + out_height) * (blizzard.line_upd_time / 1000)) {
 350                 blizzard.extif->enable_tearsync(1, 0);
 351                 return;
 352         }
 353
 354         blizzard.extif->enable_tearsync(1, y + 1);
 355 }
 356
 357 static void disable_tearsync(void)
 358 {
 359         u8 b;
 360
 361         blizzard.extif->enable_tearsync(0, 0);
 362         b = blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS);
 363         b &= ~(1 << 3);
 364         blizzard_write_reg(BLIZZARD_NDISP_CTRL_STATUS, b);
 365         b = blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS);
 366 }
 367
 368 static inline void set_extif_timings(const struct extif_timings *t);
 369
 370 static inline struct blizzard_request *alloc_req(void)
 371 {
 372         unsigned long flags;
 373         struct blizzard_request *req;
 374         int req_flags = 0;
 375
 376         if (!in_interrupt())
 377                 down(&blizzard.req_sema);
 378         else
 379                 req_flags = REQ_FROM_IRQ_POOL;
 380
 381         spin_lock_irqsave(&blizzard.req_lock, flags);
 382         BUG_ON(list_empty(&blizzard.free_req_list));
 383         req = list_entry(blizzard.free_req_list.next,
 384                          struct blizzard_request, entry);
 385         list_del(&req->entry);
 386         spin_unlock_irqrestore(&blizzard.req_lock, flags);
 387
 388         INIT_LIST_HEAD(&req->entry);
 389         req->flags = req_flags;
 390
 391         return req;
 392 }
 393
 394 static inline void free_req(struct blizzard_request *req)
 395 {
 396         unsigned long flags;
 397
 398         spin_lock_irqsave(&blizzard.req_lock, flags);
 399
 400         list_del(&req->entry);
 401         list_add(&req->entry, &blizzard.free_req_list);
 402         if (!(req->flags & REQ_FROM_IRQ_POOL))
 403                 up(&blizzard.req_sema);
 404
 405         spin_unlock_irqrestore(&blizzard.req_lock, flags);
 406 }
 407
 408 static void process_pending_requests(void)
 409 {
 410         unsigned long flags;
 411
 412         spin_lock_irqsave(&blizzard.req_lock, flags);
 413
 414         while (!list_empty(&blizzard.pending_req_list)) {
 415                 struct blizzard_request *req;
 416                 void (*complete)(void *);
 417                 void *complete_data;
 418
 419                 req = list_entry(blizzard.pending_req_list.next,
 420                                  struct blizzard_request, entry);
 421                 spin_unlock_irqrestore(&blizzard.req_lock, flags);
 422
 423                 if (req->handler(req) == REQ_PENDING)
 424                         return;
 425
 426                 complete = req->complete;
 427                 complete_data = req->complete_data;
 428                 free_req(req);
 429
 430                 if (complete)
 431                         complete(complete_data);
 432
 433                 spin_lock_irqsave(&blizzard.req_lock, flags);
 434         }
 435
 436         spin_unlock_irqrestore(&blizzard.req_lock, flags);
 437 }
 438
 439 static void submit_req_list(struct list_head *head)
 440 {
 441         unsigned long flags;
 442         int process = 1;
 443
 444         spin_lock_irqsave(&blizzard.req_lock, flags);
 445         if (likely(!list_empty(&blizzard.pending_req_list)))
 446                 process = 0;
 447         list_splice_init(head, blizzard.pending_req_list.prev);
 448         spin_unlock_irqrestore(&blizzard.req_lock, flags);
 449
 450         if (process)
 451                 process_pending_requests();
 452 }
 453
 454 static void request_complete(void *data)
 455 {
 456         struct blizzard_request *req = (struct blizzard_request *)data;
 457         void                    (*complete)(void *);
 458         void                    *complete_data;
 459
 460         complete = req->complete;
 461         complete_data = req->complete_data;
 462
 463         free_req(req);
 464
 465         if (complete)
 466                 complete(complete_data);
 467
 468         process_pending_requests();
 469 }
 470
 471
 472 static int do_full_screen_update(struct blizzard_request *req)
 473 {
 474         int i;
 475         int flags;
 476
 477         for (i = 0; i < 3; i++) {
 478                 struct plane_info *p = &blizzard.plane[i];
 479                 if (!(blizzard.enabled_planes & (1 << i))) {
 480                         blizzard.int_ctrl->enable_plane(i, 0);
 481                         continue;
 482                 }
 483                 dev_dbg(blizzard.fbdev->dev, "pw %d ph %d\n",
 484                         p->width, p->height);
 485                 blizzard.int_ctrl->setup_plane(i,
 486                                 OMAPFB_CHANNEL_OUT_LCD, p->offset,
 487                                 p->scr_width, p->pos_x, p->pos_y,
 488                                 p->width, p->height,
 489                                 p->color_mode);
 490                 blizzard.int_ctrl->enable_plane(i, 1);
 491         }
 492
 493         dev_dbg(blizzard.fbdev->dev, "sw %d sh %d\n",
 494                 blizzard.screen_width, blizzard.screen_height);
 495         blizzard_wait_line_buffer();
 496         flags = req->par.update.flags;
 497         if (flags & OMAPFB_FORMAT_FLAG_TEARSYNC)
 498                 enable_tearsync(0, blizzard.screen_width,
 499                                 blizzard.screen_height,
 500                                 blizzard.screen_height,
 501                                 blizzard.screen_height,
 502                                 flags & OMAPFB_FORMAT_FLAG_FORCE_VSYNC);
 503         else
 504                 disable_tearsync();
 505
 506         set_window_regs(0, 0, blizzard.screen_width, blizzard.screen_height,
 507                         0, 0, blizzard.screen_width, blizzard.screen_height,
 508                         BLIZZARD_COLOR_RGB565, blizzard.zoom_on, flags);
 509         blizzard.zoom_on = 0;
 510
 511         blizzard.extif->set_bits_per_cycle(16);
 512         /* set_window_regs has left the register index at the right
 513          * place, so no need to set it here.
 514          */
 515         blizzard.extif->transfer_area(blizzard.screen_width,
 516                                       blizzard.screen_height,
 517                                       request_complete, req);
 518         return REQ_PENDING;
 519 }
 520
 521 static int check_1d_intersect(int a1, int a2, int b1, int b2)
 522 {
 523         if (a2 <= b1 || b2 <= a1)
 524                 return 0;
 525         return 1;
 526 }
 527
 528 /* Setup all planes with an overlapping area with the update window. */
 529 static int do_partial_update(struct blizzard_request *req, int plane,
 530                              int x, int y, int w, int h,
 531                              int x_out, int y_out, int w_out, int h_out,
 532                              int wnd_color_mode, int bpp)
 533 {
 534         int i;
 535         int gx1, gy1, gx2, gy2;
 536         int gx1_out, gy1_out, gx2_out, gy2_out;
 537         int color_mode;
 538         int flags;
 539         int zoom_off;
 540         int have_zoom_for_this_update = 0;
 541
 542         /* Global coordinates, relative to pixel 0,0 of the LCD */
 543         gx1 = x + blizzard.plane[plane].pos_x;
 544         gy1 = y + blizzard.plane[plane].pos_y;
 545         gx2 = gx1 + w;
 546         gy2 = gy1 + h;
 547
 548         flags = req->par.update.flags;
 549         if (flags & OMAPFB_FORMAT_FLAG_DOUBLE) {
 550                 gx1_out = gx1;
 551                 gy1_out = gy1;
 552                 gx2_out = gx1 + w * 2;
 553                 gy2_out = gy1 + h * 2;
 554         } else {
 555                 gx1_out = x_out + blizzard.plane[plane].pos_x;
 556                 gy1_out = y_out + blizzard.plane[plane].pos_y;
 557                 gx2_out = gx1_out + w_out;
 558                 gy2_out = gy1_out + h_out;
 559         }
 560
 561         for (i = 0; i < OMAPFB_PLANE_NUM; i++) {
 562                 struct plane_info *p = &blizzard.plane[i];
 563                 int px1, py1;
 564                 int px2, py2;
 565                 int pw, ph;
 566                 int pposx, pposy;
 567                 unsigned long offset;
 568
 569                 if (!(blizzard.enabled_planes & (1 << i))  ||
 570                     (wnd_color_mode && i != plane)) {
 571                         blizzard.int_ctrl->enable_plane(i, 0);
 572                         continue;
 573                 }
 574                 /* Plane coordinates */
 575                 if (i == plane) {
 576                         /* Plane in which we are doing the update.
 577                          * Local coordinates are the one in the update
 578                          * request.
 579                          */
 580                         px1 = x;
 581                         py1 = y;
 582                         px2 = x + w;
 583                         py2 = y + h;
 584                         pposx = 0;
 585                         pposy = 0;
 586                 } else {
 587                         /* Check if this plane has an overlapping part */
 588                         px1 = gx1 - p->pos_x;
 589                         py1 = gy1 - p->pos_y;
 590                         px2 = gx2 - p->pos_x;
 591                         py2 = gy2 - p->pos_y;
 592                         if (px1 >= p->width || py1 >= p->height ||
 593                             px2 <= 0 || py2 <= 0) {
 594                                 blizzard.int_ctrl->enable_plane(i, 0);
 595                                 continue;
 596                         }
 597                         /* Calculate the coordinates for the overlapping
 598                          * part in the plane's local coordinates.
 599                          */
 600                         pposx = -px1;
 601                         pposy = -py1;
 602                         if (px1 < 0)
 603                                 px1 = 0;
 604                         if (py1 < 0)
 605                                 py1 = 0;
 606                         if (px2 > p->width)
 607                                 px2 = p->width;
 608                         if (py2 > p->height)
 609                                 py2 = p->height;
 610                         if (pposx < 0)
 611                                 pposx = 0;
 612                         if (pposy < 0)
 613                                 pposy = 0;
 614                 }
 615                 pw = px2 - px1;
 616                 ph = py2 - py1;
 617                 offset = p->offset + (p->scr_width * py1 + px1) * p->bpp / 8;
 618                 if (wnd_color_mode)
 619                         /* Window embedded in the plane with a differing
 620                          * color mode / bpp. Calculate the number of DMA
 621                          * transfer elements in terms of the plane's bpp.
 622                          */
 623                         pw = (pw + 1) * bpp / p->bpp;
 624 #ifdef VERBOSE
 625                 dev_dbg(blizzard.fbdev->dev,
 626                         "plane %d offset %#08lx pposx %d pposy %d "
 627                         "px1 %d py1 %d pw %d ph %d\n",
 628                         i, offset, pposx, pposy, px1, py1, pw, ph);
 629 #endif
 630                 blizzard.int_ctrl->setup_plane(i,
 631                                 OMAPFB_CHANNEL_OUT_LCD, offset,
 632                                 p->scr_width,
 633                                 pposx, pposy, pw, ph,
 634                                 p->color_mode);
 635
 636                 blizzard.int_ctrl->enable_plane(i, 1);
 637         }
 638
 639         switch (wnd_color_mode) {
 640         case OMAPFB_COLOR_YUV420:
 641                 color_mode = BLIZZARD_COLOR_YUV420;
 642                 /* Currently only the 16 bits/pixel cycle format is
 643                  * supported on the external interface. Adjust the number
 644                  * of transfer elements per line for 12bpp format.
 645                  */
 646                 w = (w + 1) * 3 / 4;
 647                 break;
 648         default:
 649                 color_mode = BLIZZARD_COLOR_RGB565;
 650                 break;
 651         }
 652
 653         blizzard_wait_line_buffer();
 654         if (blizzard.last_color_mode == BLIZZARD_COLOR_YUV420)
 655                 blizzard_wait_yyc();
 656         blizzard.last_color_mode = color_mode;
 657         if (flags & OMAPFB_FORMAT_FLAG_TEARSYNC)
 658                 enable_tearsync(gy1, w, h,
 659                                 blizzard.screen_height,
 660                                 h_out,
 661                                 flags & OMAPFB_FORMAT_FLAG_FORCE_VSYNC);
 662         else
 663                 disable_tearsync();
 664
 665         if ((gx2_out - gx1_out) != (gx2 - gx1) ||
 666             (gy2_out - gy1_out) != (gy2 - gy1))
 667                 have_zoom_for_this_update = 1;
 668
 669         /* 'background' type of screen update (as opposed to 'destructive')
 670            can be used to disable scaling if scaling is active */
 671         zoom_off = blizzard.zoom_on && !have_zoom_for_this_update &&
 672             (gx1_out == 0) && (gx2_out == blizzard.screen_width) &&
 673             (gy1_out == 0) && (gy2_out == blizzard.screen_height) &&
 674             (gx1 == 0) && (gy1 == 0);
 675
 676         if (blizzard.zoom_on && !have_zoom_for_this_update && !zoom_off &&
 677             check_1d_intersect(blizzard.zoom_area_gx1, blizzard.zoom_area_gx2,
 678                                gx1_out, gx2_out) &&
 679             check_1d_intersect(blizzard.zoom_area_gy1, blizzard.zoom_area_gy2,
 680                                gy1_out, gy2_out)) {
 681                 /* Previous screen update was using scaling, current update
 682                  * is not using it. Additionally, current screen update is
 683                  * going to overlap with the scaled area. Scaling needs to be
 684                  * disabled in order to avoid 'magnifying glass' effect.
 685                  * Dummy setup of background window can be used for this.
 686                  */
 687                 set_window_regs(0, 0, blizzard.screen_width,
 688                                 blizzard.screen_height,
 689                                 0, 0, blizzard.screen_width,
 690                                 blizzard.screen_height,
 691                                 BLIZZARD_COLOR_RGB565, 1, flags);
 692                 blizzard.zoom_on = 0;
 693         }
 694
 695         /* remember scaling settings if we have scaled update */
 696         if (have_zoom_for_this_update) {
 697                 blizzard.zoom_on = 1;
 698                 blizzard.zoom_area_gx1 = gx1_out;
 699                 blizzard.zoom_area_gx2 = gx2_out;
 700                 blizzard.zoom_area_gy1 = gy1_out;
 701                 blizzard.zoom_area_gy2 = gy2_out;
 702         }
 703
 704         set_window_regs(gx1, gy1, gx2, gy2, gx1_out, gy1_out, gx2_out, gy2_out,
 705                         color_mode, zoom_off, flags);
 706         if (zoom_off)
 707                 blizzard.zoom_on = 0;
 708
 709         blizzard.extif->set_bits_per_cycle(16);
 710         /* set_window_regs has left the register index at the right
 711          * place, so no need to set it here.
 712          */
 713         blizzard.extif->transfer_area(w, h, request_complete, req);
 714
 715         return REQ_PENDING;
 716 }
 717
 718 static int send_frame_handler(struct blizzard_request *req)
 719 {
 720         struct update_param *par = &req->par.update;
 721         int plane = par->plane;
 722
 723 #ifdef VERBOSE
 724         dev_dbg(blizzard.fbdev->dev,
 725                 "send_frame: x %d y %d w %d h %d "
 726                 "x_out %d y_out %d w_out %d h_out %d "
 727                 "color_mode %04x flags %04x planes %01x\n",
 728                 par->x, par->y, par->width, par->height,
 729                 par->out_x, par->out_y, par->out_width, par->out_height,
 730                 par->color_mode, par->flags, blizzard.enabled_planes);
 731 #endif
 732         if (par->flags & OMAPFB_FORMAT_FLAG_DISABLE_OVERLAY)
 733                 disable_overlay();
 734
 735         if ((blizzard.enabled_planes & blizzard.vid_nonstd_color) ||
 736              (blizzard.enabled_planes & blizzard.vid_scaled))
 737                 return do_full_screen_update(req);
 738
 739         return do_partial_update(req, plane, par->x, par->y,
 740                                  par->width, par->height,
 741                                  par->out_x, par->out_y,
 742                                  par->out_width, par->out_height,
 743                                  par->color_mode, par->bpp);
 744 }
 745
 746 static void send_frame_complete(void *data)
 747 {
 748 }
 749
 750 #define ADD_PREQ(_x, _y, _w, _h, _x_out, _y_out, _w_out, _h_out) do {   \
 751         req = alloc_req();                      \
 752         req->handler    = send_frame_handler;   \
 753         req->complete   = send_frame_complete;  \
 754         req->par.update.plane = plane_idx;      \
 755         req->par.update.x = _x;                 \
 756         req->par.update.y = _y;                 \
 757         req->par.update.width  = _w;            \
 758         req->par.update.height = _h;            \
 759         req->par.update.out_x = _x_out;         \
 760         req->par.update.out_y = _y_out;         \
 761         req->par.update.out_width = _w_out;     \
 762         req->par.update.out_height = _h_out;    \
 763         req->par.update.bpp = bpp;              \
 764         req->par.update.color_mode = color_mode;\
 765         req->par.update.flags     = flags;      \
 766         list_add_tail(&req->entry, req_head);   \
 767 } while(0)
 768
 769 static void create_req_list(int plane_idx,
 770                             struct omapfb_update_window *win,
 771                             struct list_head *req_head)
 772 {
 773         struct blizzard_request *req;
 774         int x = win->x;
 775         int y = win->y;
 776         int width = win->width;
 777         int height = win->height;
 778         int x_out = win->out_x;
 779         int y_out = win->out_y;
 780         int width_out = win->out_width;
 781         int height_out = win->out_height;
 782         int color_mode;
 783         int bpp;
 784         int flags;
 785         unsigned int ystart = y;
 786         unsigned int yspan = height;
 787         unsigned int ystart_out = y_out;
 788         unsigned int yspan_out = height_out;
 789
 790         flags = win->format & ~OMAPFB_FORMAT_MASK;
 791         color_mode = win->format & OMAPFB_FORMAT_MASK;
 792         switch (color_mode) {
 793         case OMAPFB_COLOR_YUV420:
 794                 /* Embedded window with different color mode */
 795                 bpp = 12;
 796                 /* X, Y, height must be aligned at 2, width at 4 pixels */
 797                 x &= ~1;
 798                 y &= ~1;
 799                 height = yspan = height & ~1;
 800                 width = width & ~3;
 801                 break;
 802         default:
 803                 /* Same as the plane color mode */
 804                 bpp = blizzard.plane[plane_idx].bpp;
 805                 break;
 806         }
 807         if (width * height * bpp / 8 > blizzard.max_transmit_size) {
 808                 yspan = blizzard.max_transmit_size / (width * bpp / 8);
 809                 yspan_out = yspan * height_out / height;
 810                 ADD_PREQ(x, ystart, width, yspan, x_out, ystart_out,
 811                          width_out, yspan_out);
 812                 ystart += yspan;
 813                 ystart_out += yspan_out;
 814                 yspan = height - yspan;
 815                 yspan_out = height_out - yspan_out;
 816                 flags &= ~OMAPFB_FORMAT_FLAG_TEARSYNC;
 817         }
 818
 819         ADD_PREQ(x, ystart, width, yspan, x_out, ystart_out,
 820                  width_out, yspan_out);
 821 }
 822
 823 static void auto_update_complete(void *data)
 824 {
 825         if (!blizzard.stop_auto_update)
 826                 mod_timer(&blizzard.auto_update_timer,
 827                           jiffies + BLIZZARD_AUTO_UPDATE_TIME);
 828 }
 829
 830 static void blizzard_update_window_auto(unsigned long arg)
 831 {
 832         LIST_HEAD(req_list);
 833         struct blizzard_request *last;
 834         struct omapfb_plane_struct *plane;
 835
 836         plane = blizzard.fbdev->fb_info[0]->par;
 837         create_req_list(plane->idx,
 838                         &blizzard.auto_update_window, &req_list);
 839         last = list_entry(req_list.prev, struct blizzard_request, entry);
 840
 841         last->complete = auto_update_complete;
 842         last->complete_data = NULL;
 843
 844         submit_req_list(&req_list);
 845 }
 846
 847 int blizzard_update_window_async(struct fb_info *fbi,
 848                                  struct omapfb_update_window *win,
 849                                  void (*complete_callback)(void *arg),
 850                                  void *complete_callback_data)
 851 {
 852         LIST_HEAD(req_list);
 853         struct blizzard_request *last;
 854         struct omapfb_plane_struct *plane = fbi->par;
 855
 856         if (unlikely(blizzard.update_mode != OMAPFB_MANUAL_UPDATE))
 857                 return -EINVAL;
 858         if (unlikely(!blizzard.te_connected &&
 859                      (win->format & OMAPFB_FORMAT_FLAG_TEARSYNC)))
 860                 return -EINVAL;
 861
 862         create_req_list(plane->idx, win, &req_list);
 863         last = list_entry(req_list.prev, struct blizzard_request, entry);
 864
 865         last->complete = complete_callback;
 866         last->complete_data = (void *)complete_callback_data;
 867
 868         submit_req_list(&req_list);
 869
 870         return 0;
 871 }
 872 EXPORT_SYMBOL(blizzard_update_window_async);
 873
 874 static int update_full_screen(void)
 875 {
 876         return blizzard_update_window_async(blizzard.fbdev->fb_info[0],
 877                                      &blizzard.auto_update_window, NULL, NULL);
 878
 879 }
 880
 881 static int blizzard_setup_plane(int plane, int channel_out,
 882                                   unsigned long offset, int screen_width,
 883                                   int pos_x, int pos_y, int width, int height,
 884                                   int color_mode)
 885 {
 886         struct plane_info *p;
 887
 888 #ifdef VERBOSE
 889         dev_dbg(blizzard.fbdev->dev,
 890                     "plane %d ch_out %d offset %#08lx scr_width %d "
 891                     "pos_x %d pos_y %d width %d height %d color_mode %d\n",
 892                     plane, channel_out, offset, screen_width,
 893                     pos_x, pos_y, width, height, color_mode);
 894 #endif
 895         if ((unsigned)plane > OMAPFB_PLANE_NUM)
 896                 return -EINVAL;
 897         p = &blizzard.plane[plane];
 898
 899         switch (color_mode) {
 900         case OMAPFB_COLOR_YUV422:
 901         case OMAPFB_COLOR_YUY422:
 902                 p->bpp = 16;
 903                 blizzard.vid_nonstd_color &= ~(1 << plane);
 904                 break;
 905         case OMAPFB_COLOR_YUV420:
 906                 p->bpp = 12;
 907                 blizzard.vid_nonstd_color |= 1 << plane;
 908                 break;
 909         case OMAPFB_COLOR_RGB565:
 910                 p->bpp = 16;
 911                 blizzard.vid_nonstd_color &= ~(1 << plane);
 912                 break;
 913         default:
 914                 return -EINVAL;
 915         }
 916
 917         p->offset = offset;
 918         p->pos_x = pos_x;
 919         p->pos_y = pos_y;
 920         p->width = width;
 921         p->height = height;
 922         p->scr_width = screen_width;
 923         if (!p->out_width)
 924                 p->out_width = width;
 925         if (!p->out_height)
 926                 p->out_height = height;
 927
 928         p->color_mode = color_mode;
 929
 930         return 0;
 931 }
 932
 933 static int blizzard_set_scale(int plane, int orig_w, int orig_h,
 934                               int out_w, int out_h)
 935 {
 936         struct plane_info *p = &blizzard.plane[plane];
 937         int r;
 938
 939         dev_dbg(blizzard.fbdev->dev,
 940                 "plane %d orig_w %d orig_h %d out_w %d out_h %d\n",
 941                 plane, orig_w, orig_h, out_w, out_h);
 942         if ((unsigned)plane > OMAPFB_PLANE_NUM)
 943                 return -ENODEV;
 944
 945         r = blizzard.int_ctrl->set_scale(plane, orig_w, orig_h, out_w, out_h);
 946         if (r < 0)
 947                 return r;
 948
 949         p->width = orig_w;
 950         p->height = orig_h;
 951         p->out_width = out_w;
 952         p->out_height = out_h;
 953         if (orig_w == out_w && orig_h == out_h)
 954                 blizzard.vid_scaled &= ~(1 << plane);
 955         else
 956                 blizzard.vid_scaled |= 1 << plane;
 957
 958         return 0;
 959 }
 960
 961 static int blizzard_set_rotate(int angle)
 962 {
 963         u32 l;
 964
 965         l = blizzard_read_reg(BLIZZARD_PANEL_CONFIGURATION);
 966         l &= ~0x03;
 967
 968         switch (angle) {
 969         case 0:
 970                 l = l | 0x00;
 971                 break;
 972         case 90:
 973                 l = l | 0x03;
 974                 break;
 975         case 180:
 976                 l = l | 0x02;
 977                 break;
 978         case 270:
 979                 l = l | 0x01;
 980                 break;
 981         default:
 982                 return -EINVAL;
 983         }
 984
 985         blizzard_write_reg(BLIZZARD_PANEL_CONFIGURATION, l);
 986
 987         return 0;
 988 }
 989
 990 static int blizzard_enable_plane(int plane, int enable)
 991 {
 992         if (enable)
 993                 blizzard.enabled_planes |= 1 << plane;
 994         else
 995                 blizzard.enabled_planes &= ~(1 << plane);
 996
 997         return 0;
 998 }
 999
1000 static int sync_handler(struct blizzard_request *req)
1001 {
1002         complete(req->par.sync);
1003         return REQ_COMPLETE;
1004 }
1005
1006 static void blizzard_sync(void)
1007 {
1008         LIST_HEAD(req_list);
1009         struct blizzard_request *req;
1010         struct completion comp;
1011
1012         req = alloc_req();
1013
1014         req->handler = sync_handler;
1015         req->complete = NULL;
1016         init_completion(&comp);
1017         req->par.sync = &comp;
1018
1019         list_add(&req->entry, &req_list);
1020         submit_req_list(&req_list);
1021
1022         wait_for_completion(&comp);
1023 }
1024
1025
1026 static void blizzard_bind_client(struct omapfb_notifier_block *nb)
1027 {
1028         if (blizzard.update_mode == OMAPFB_MANUAL_UPDATE) {
1029                 omapfb_notify_clients(blizzard.fbdev, OMAPFB_EVENT_READY);
1030         }
1031 }
1032
1033 static int blizzard_set_update_mode(enum omapfb_update_mode mode)
1034 {
1035         if (unlikely(mode != OMAPFB_MANUAL_UPDATE &&
1036                      mode != OMAPFB_AUTO_UPDATE &&
1037                      mode != OMAPFB_UPDATE_DISABLED))
1038                 return -EINVAL;
1039
1040         if (mode == blizzard.update_mode)
1041                 return 0;
1042
1043         dev_info(blizzard.fbdev->dev, "s1d1374x: setting update mode to %s\n",
1044                         mode == OMAPFB_UPDATE_DISABLED ? "disabled" :
1045                         (mode == OMAPFB_AUTO_UPDATE ? "auto" : "manual"));
1046
1047         switch (blizzard.update_mode) {
1048         case OMAPFB_MANUAL_UPDATE:
1049                 omapfb_notify_clients(blizzard.fbdev, OMAPFB_EVENT_DISABLED);
1050                 break;
1051         case OMAPFB_AUTO_UPDATE:
1052                 blizzard.stop_auto_update = 1;
1053                 del_timer_sync(&blizzard.auto_update_timer);
1054                 break;
1055         case OMAPFB_UPDATE_DISABLED:
1056                 break;
1057         }
1058
1059         blizzard.update_mode = mode;
1060         blizzard_sync();
1061         blizzard.stop_auto_update = 0;
1062
1063         switch (mode) {
1064         case OMAPFB_MANUAL_UPDATE:
1065                 omapfb_notify_clients(blizzard.fbdev, OMAPFB_EVENT_READY);
1066                 break;
1067         case OMAPFB_AUTO_UPDATE:
1068                 blizzard_update_window_auto(0);
1069                 break;
1070         case OMAPFB_UPDATE_DISABLED:
1071                 break;
1072         }
1073
1074         return 0;
1075 }
1076
1077 static enum omapfb_update_mode blizzard_get_update_mode(void)
1078 {
1079         return blizzard.update_mode;
1080 }
1081
1082 static inline void set_extif_timings(const struct extif_timings *t)
1083 {
1084         blizzard.extif->set_timings(t);
1085 }
1086
1087 static inline unsigned long round_to_extif_ticks(unsigned long ps, int div)
1088 {
1089         int bus_tick = blizzard.extif_clk_period * div;
1090         return (ps + bus_tick - 1) / bus_tick * bus_tick;
1091 }
1092
1093 static int calc_reg_timing(unsigned long sysclk, int div)
1094 {
1095         struct extif_timings *t;
1096         unsigned long systim;
1097
1098         /* CSOnTime 0, WEOnTime 2 ns, REOnTime 2 ns,
1099          * AccessTime 2 ns + 12.2 ns (regs),
1100          * WEOffTime = WEOnTime + 1 ns,
1101          * REOffTime = REOnTime + 12 ns (regs),
1102          * CSOffTime = REOffTime + 1 ns
1103          * ReadCycle = 2ns + 2*SYSCLK  (regs),
1104          * WriteCycle = 2*SYSCLK + 2 ns,
1105          * CSPulseWidth = 10 ns */
1106
1107         systim = 1000000000 / (sysclk / 1000);
1108         dev_dbg(blizzard.fbdev->dev,
1109                   "Blizzard systim %lu ps extif_clk_period %u div %d\n",
1110                   systim, blizzard.extif_clk_period, div);
1111
1112         t = &blizzard.reg_timings;
1113         memset(t, 0, sizeof(*t));
1114
1115         t->clk_div = div;
1116
1117         t->cs_on_time = 0;
1118         t->we_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div);
1119         t->re_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div);
1120         t->access_time = round_to_extif_ticks(t->re_on_time + 12200, div);
1121         t->we_off_time = round_to_extif_ticks(t->we_on_time + 1000, div);
1122         t->re_off_time = round_to_extif_ticks(t->re_on_time + 13000, div);
1123         t->cs_off_time = round_to_extif_ticks(t->re_off_time + 1000, div);
1124         t->we_cycle_time = round_to_extif_ticks(2 * systim + 2000, div);
1125         if (t->we_cycle_time < t->we_off_time)
1126                 t->we_cycle_time = t->we_off_time;
1127         t->re_cycle_time = round_to_extif_ticks(2 * systim + 2000, div);
1128         if (t->re_cycle_time < t->re_off_time)
1129                 t->re_cycle_time = t->re_off_time;
1130         t->cs_pulse_width = 0;
1131
1132         dev_dbg(blizzard.fbdev->dev, "[reg]cson %d csoff %d reon %d reoff %d\n",
1133                  t->cs_on_time, t->cs_off_time, t->re_on_time, t->re_off_time);
1134         dev_dbg(blizzard.fbdev->dev, "[reg]weon %d weoff %d recyc %d wecyc %d\n",
1135                  t->we_on_time, t->we_off_time, t->re_cycle_time,
1136                  t->we_cycle_time);
1137         dev_dbg(blizzard.fbdev->dev, "[reg]rdaccess %d cspulse %d\n",
1138                  t->access_time, t->cs_pulse_width);
1139
1140         return blizzard.extif->convert_timings(t);
1141 }
1142
1143 static int calc_lut_timing(unsigned long sysclk, int div)
1144 {
1145         struct extif_timings *t;
1146         unsigned long systim;
1147
1148         /* CSOnTime 0, WEOnTime 2 ns, REOnTime 2 ns,
1149          * AccessTime 2 ns + 4 * SYSCLK + 26 (lut),
1150          * WEOffTime = WEOnTime + 1 ns,
1151          * REOffTime = REOnTime + 4*SYSCLK + 26 ns (lut),
1152          * CSOffTime = REOffTime + 1 ns
1153          * ReadCycle = 2ns + 4*SYSCLK + 26 ns (lut),
1154          * WriteCycle = 2*SYSCLK + 2 ns,
1155          * CSPulseWidth = 10 ns */
1156
1157         systim = 1000000000 / (sysclk / 1000);
1158         dev_dbg(blizzard.fbdev->dev,
1159                 "Blizzard systim %lu ps extif_clk_period %u div %d\n",
1160                 systim, blizzard.extif_clk_period, div);
1161
1162         t = &blizzard.lut_timings;
1163         memset(t, 0, sizeof(*t));
1164
1165         t->clk_div = div;
1166
1167         t->cs_on_time = 0;
1168         t->we_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div);
1169         t->re_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div);
1170         t->access_time = round_to_extif_ticks(t->re_on_time + 4 * systim +
1171                                               26000, div);
1172         t->we_off_time = round_to_extif_ticks(t->we_on_time + 1000, div);
1173         t->re_off_time = round_to_extif_ticks(t->re_on_time + 4 * systim +
1174                                               26000, div);
1175         t->cs_off_time = round_to_extif_ticks(t->re_off_time + 1000, div);
1176         t->we_cycle_time = round_to_extif_ticks(2 * systim + 2000, div);
1177         if (t->we_cycle_time < t->we_off_time)
1178                 t->we_cycle_time = t->we_off_time;
1179         t->re_cycle_time = round_to_extif_ticks(2000 + 4 * systim + 26000, div);
1180         if (t->re_cycle_time < t->re_off_time)
1181                 t->re_cycle_time = t->re_off_time;
1182         t->cs_pulse_width = 0;
1183
1184         dev_dbg(blizzard.fbdev->dev,
1185                  "[lut]cson %d csoff %d reon %d reoff %d\n",
1186                  t->cs_on_time, t->cs_off_time, t->re_on_time, t->re_off_time);
1187         dev_dbg(blizzard.fbdev->dev,
1188                  "[lut]weon %d weoff %d recyc %d wecyc %d\n",
1189                  t->we_on_time, t->we_off_time, t->re_cycle_time,
1190                  t->we_cycle_time);
1191         dev_dbg(blizzard.fbdev->dev, "[lut]rdaccess %d cspulse %d\n",
1192                  t->access_time, t->cs_pulse_width);
1193
1194         return blizzard.extif->convert_timings(t);
1195 }
1196
1197 static int calc_extif_timings(unsigned long sysclk, int *extif_mem_div)
1198 {
1199         int max_clk_div;
1200         int div;
1201
1202         blizzard.extif->get_clk_info(&blizzard.extif_clk_period, &max_clk_div);
1203         for (div = 1; div <= max_clk_div; div++) {
1204                 if (calc_reg_timing(sysclk, div) == 0)
1205                         break;
1206         }
1207         if (div > max_clk_div) {
1208                 dev_dbg(blizzard.fbdev->dev, "reg timing failed\n");
1209                 goto err;
1210         }
1211         *extif_mem_div = div;
1212
1213         for (div = 1; div <= max_clk_div; div++) {
1214                 if (calc_lut_timing(sysclk, div) == 0)
1215                         break;
1216         }
1217
1218         if (div > max_clk_div)
1219                 goto err;
1220
1221         blizzard.extif_clk_div = div;
1222
1223         return 0;
1224 err:
1225         dev_err(blizzard.fbdev->dev, "can't setup timings\n");
1226         return -1;
1227 }
1228
1229 static void calc_blizzard_clk_rates(unsigned long ext_clk,
1230                                 unsigned long *sys_clk, unsigned long *pix_clk)
1231 {
1232         int pix_clk_src;
1233         int sys_div = 0, sys_mul = 0;
1234         int pix_div;
1235
1236         pix_clk_src = blizzard_read_reg(BLIZZARD_CLK_SRC);
1237         pix_div = ((pix_clk_src >> 3) & 0x1f) + 1;
1238         if ((pix_clk_src & (0x3 << 1)) == 0) {
1239                 /* Source is the PLL */
1240                 sys_div = (blizzard_read_reg(BLIZZARD_PLL_DIV) & 0x3f) + 1;
1241                 sys_mul = blizzard_read_reg(BLIZZARD_PLL_CLOCK_SYNTH_0);
1242                 sys_mul |= ((blizzard_read_reg(BLIZZARD_PLL_CLOCK_SYNTH_1)
1243                                 & 0x0f) << 11);
1244                 *sys_clk = ext_clk * sys_mul / sys_div;
1245         } else  /* else source is ext clk, or oscillator */
1246                 *sys_clk = ext_clk;
1247
1248         *pix_clk = *sys_clk / pix_div;                  /* HZ */
1249         dev_dbg(blizzard.fbdev->dev,
1250                 "ext_clk %ld pix_src %d pix_div %d sys_div %d sys_mul %d\n",
1251                 ext_clk, pix_clk_src & (0x3 << 1), pix_div, sys_div, sys_mul);
1252         dev_dbg(blizzard.fbdev->dev, "sys_clk %ld pix_clk %ld\n",
1253                 *sys_clk, *pix_clk);
1254 }
1255
1256 static int setup_tearsync(unsigned long pix_clk, int extif_div)
1257 {
1258         int hdisp, vdisp;
1259         int hndp, vndp;
1260         int hsw, vsw;
1261         int hs, vs;
1262         int hs_pol_inv, vs_pol_inv;
1263         int use_hsvs, use_ndp;
1264         u8  b;
1265
1266         hsw = blizzard_read_reg(BLIZZARD_HSW);
1267         vsw = blizzard_read_reg(BLIZZARD_VSW);
1268         hs_pol_inv = !(hsw & 0x80);
1269         vs_pol_inv = !(vsw & 0x80);
1270         hsw = hsw & 0x7f;
1271         vsw = vsw & 0x3f;
1272
1273         hdisp = blizzard_read_reg(BLIZZARD_HDISP) * 8;
1274         vdisp = blizzard_read_reg(BLIZZARD_VDISP0) +
1275                 ((blizzard_read_reg(BLIZZARD_VDISP1) & 0x3) << 8);
1276
1277         hndp = blizzard_read_reg(BLIZZARD_HNDP) & 0x3f;
1278         vndp = blizzard_read_reg(BLIZZARD_VNDP);
1279
1280         /* time to transfer one pixel (16bpp) in ps */
1281         blizzard.pix_tx_time = blizzard.reg_timings.we_cycle_time;
1282         if (blizzard.extif->get_max_tx_rate != NULL) {
1283                 /* The external interface might have a rate limitation,
1284                  * if so, we have to maximize our transfer rate.
1285                  */
1286                 unsigned long min_tx_time;
1287                 unsigned long max_tx_rate = blizzard.extif->get_max_tx_rate();
1288
1289                 dev_dbg(blizzard.fbdev->dev, "max_tx_rate %ld HZ\n",
1290                         max_tx_rate);
1291                 min_tx_time = 1000000000 / (max_tx_rate / 1000);  /* ps */
1292                 if (blizzard.pix_tx_time < min_tx_time)
1293                         blizzard.pix_tx_time = min_tx_time;
1294         }
1295
1296         /* time to update one line in ps */
1297         blizzard.line_upd_time = (hdisp + hndp) * 1000000 / (pix_clk / 1000);
1298         blizzard.line_upd_time *= 1000;
1299         if (hdisp * blizzard.pix_tx_time > blizzard.line_upd_time)
1300                 /* transfer speed too low, we might have to use both
1301                  * HS and VS */
1302                 use_hsvs = 1;
1303         else
1304                 /* decent transfer speed, we'll always use only VS */
1305                 use_hsvs = 0;
1306
1307         if (use_hsvs && (hs_pol_inv || vs_pol_inv)) {
1308                 /* HS or'ed with VS doesn't work, use the active high
1309                  * TE signal based on HNDP / VNDP */
1310                 use_ndp = 1;
1311                 hs_pol_inv = 0;
1312                 vs_pol_inv = 0;
1313                 hs = hndp;
1314                 vs = vndp;
1315         } else {
1316                 /* Use HS or'ed with VS as a TE signal if both are needed
1317                  * or VNDP if only vsync is needed. */
1318                 use_ndp = 0;
1319                 hs = hsw;
1320                 vs = vsw;
1321                 if (!use_hsvs) {
1322                         hs_pol_inv = 0;
1323                         vs_pol_inv = 0;
1324                 }
1325         }
1326
1327         hs = hs * 1000000 / (pix_clk / 1000);             /* ps */
1328         hs *= 1000;
1329
1330         vs = vs * (hdisp + hndp) * 1000000 / (pix_clk / 1000); /* ps */
1331         vs *= 1000;
1332
1333         if (vs <= hs)
1334                 return -EDOM;
1335         /* set VS to 120% of HS to minimize VS detection time */
1336         vs = hs * 12 / 10;
1337         /* minimize HS too */
1338         if (hs > 10000)
1339                 hs = 10000;
1340
1341         b = blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS);
1342         b &= ~0x3;
1343         b |= use_hsvs ? 1 : 0;
1344         b |= (use_ndp && use_hsvs) ? 0 : 2;
1345         blizzard_write_reg(BLIZZARD_NDISP_CTRL_STATUS, b);
1346
1347         blizzard.vsync_only = !use_hsvs;
1348
1349         dev_dbg(blizzard.fbdev->dev,
1350                 "pix_clk %ld HZ pix_tx_time %ld ps line_upd_time %ld ps\n",
1351                 pix_clk, blizzard.pix_tx_time, blizzard.line_upd_time);
1352         dev_dbg(blizzard.fbdev->dev,
1353                 "hs %d ps vs %d ps mode %d vsync_only %d\n",
1354                 hs, vs, b & 0x3, !use_hsvs);
1355
1356         return blizzard.extif->setup_tearsync(1, hs, vs,
1357                                               hs_pol_inv, vs_pol_inv,
1358                                               extif_div);
1359 }
1360
1361 static void blizzard_get_caps(int plane, struct omapfb_caps *caps)
1362 {
1363         blizzard.int_ctrl->get_caps(plane, caps);
1364         caps->ctrl |= OMAPFB_CAPS_MANUAL_UPDATE |
1365                 OMAPFB_CAPS_WINDOW_PIXEL_DOUBLE |
1366                 OMAPFB_CAPS_WINDOW_SCALE |
1367                 OMAPFB_CAPS_WINDOW_OVERLAY |
1368                 OMAPFB_CAPS_WINDOW_ROTATE;
1369         if (blizzard.te_connected)
1370                 caps->ctrl |= OMAPFB_CAPS_TEARSYNC;
1371         caps->wnd_color |= (1 << OMAPFB_COLOR_RGB565) |
1372                            (1 << OMAPFB_COLOR_YUV420);
1373 }
1374
1375 static void _save_regs(struct blizzard_reg_list *list, int cnt)
1376 {
1377         int i;
1378
1379         for (i = 0; i < cnt; i++, list++) {
1380                 int reg;
1381                 for (reg = list->start; reg <= list->end; reg += 2)
1382                         blizzard_reg_cache[reg / 2] = blizzard_read_reg(reg);
1383         }
1384 }
1385
1386 static void _restore_regs(struct blizzard_reg_list *list, int cnt)
1387 {
1388         int i;
1389
1390         for (i = 0; i < cnt; i++, list++) {
1391                 int reg;
1392                 for (reg = list->start; reg <= list->end; reg += 2)
1393                         blizzard_write_reg(reg, blizzard_reg_cache[reg / 2]);
1394         }
1395 }
1396
1397 static void blizzard_save_all_regs(void)
1398 {
1399         _save_regs(blizzard_pll_regs, ARRAY_SIZE(blizzard_pll_regs));
1400         _save_regs(blizzard_gen_regs, ARRAY_SIZE(blizzard_gen_regs));
1401 }
1402
1403 static void blizzard_restore_pll_regs(void)
1404 {
1405         _restore_regs(blizzard_pll_regs, ARRAY_SIZE(blizzard_pll_regs));
1406 }
1407
1408 static void blizzard_restore_gen_regs(void)
1409 {
1410         _restore_regs(blizzard_gen_regs, ARRAY_SIZE(blizzard_gen_regs));
1411 }
1412
1413 static void blizzard_suspend(void)
1414 {
1415         u32 l;
1416         unsigned long tmo;
1417
1418         if (blizzard.last_color_mode) {
1419                 update_full_screen();
1420                 blizzard_sync();
1421         }
1422         blizzard.update_mode_before_suspend = blizzard.update_mode;
1423         /* the following will disable clocks as well */
1424         blizzard_set_update_mode(OMAPFB_UPDATE_DISABLED);
1425
1426         blizzard_save_all_regs();
1427
1428         blizzard_stop_sdram();
1429
1430         l = blizzard_read_reg(BLIZZARD_POWER_SAVE);
1431         /* Standby, Sleep. We assume we use an external clock. */
1432         l |= 0x03;
1433         blizzard_write_reg(BLIZZARD_POWER_SAVE, l);
1434
1435         tmo = jiffies + msecs_to_jiffies(100);
1436         while (!(blizzard_read_reg(BLIZZARD_PLL_MODE) & (1 << 1))) {
1437                 if (time_after(jiffies, tmo)) {
1438                         dev_err(blizzard.fbdev->dev,
1439                                 "s1d1374x: sleep timeout, stopping PLL manually\n");
1440                         l = blizzard_read_reg(BLIZZARD_PLL_MODE);
1441                         l &= ~0x03;
1442                         /* Disable PLL, counter function */
1443                         l |= 0x2;
1444                         blizzard_write_reg(BLIZZARD_PLL_MODE, l);
1445                         break;
1446                 }
1447                 msleep(1);
1448         }
1449
1450         if (blizzard.power_down != NULL)
1451                 blizzard.power_down(blizzard.fbdev->dev);
1452 }
1453
1454 static void blizzard_resume(void)
1455 {
1456         u32 l;
1457
1458         if (blizzard.power_up != NULL)
1459                 blizzard.power_up(blizzard.fbdev->dev);
1460
1461         l = blizzard_read_reg(BLIZZARD_POWER_SAVE);
1462         /* Standby, Sleep */
1463         l &= ~0x03;
1464         blizzard_write_reg(BLIZZARD_POWER_SAVE, l);
1465
1466         blizzard_restore_pll_regs();
1467         l = blizzard_read_reg(BLIZZARD_PLL_MODE);
1468         l &= ~0x03;
1469         /* Enable PLL, counter function */
1470         l |= 0x1;
1471         blizzard_write_reg(BLIZZARD_PLL_MODE, l);
1472
1473         while (!(blizzard_read_reg(BLIZZARD_PLL_DIV) & (1 << 7)))
1474                 msleep(1);
1475
1476         blizzard_restart_sdram();
1477
1478         blizzard_restore_gen_regs();
1479
1480         /* Enable display */
1481         blizzard_write_reg(BLIZZARD_DISPLAY_MODE, 0x01);
1482
1483         /* the following will enable clocks as necessary */
1484         blizzard_set_update_mode(blizzard.update_mode_before_suspend);
1485
1486         /* Force a background update */
1487         blizzard.zoom_on = 1;
1488         update_full_screen();
1489         blizzard_sync();
1490 }
1491
1492 static int blizzard_init(struct omapfb_device *fbdev, int ext_mode,
1493                          struct omapfb_mem_desc *req_vram)
1494 {
1495         int r = 0, i;
1496         u8 rev, conf;
1497         unsigned long ext_clk;
1498         int extif_div;
1499         unsigned long sys_clk, pix_clk;
1500         struct omapfb_platform_data *omapfb_conf;
1501         struct blizzard_platform_data *ctrl_conf;
1502
1503         blizzard.fbdev = fbdev;
1504
1505         BUG_ON(!fbdev->ext_if || !fbdev->int_ctrl);
1506
1507         blizzard.fbdev = fbdev;
1508         blizzard.extif = fbdev->ext_if;
1509         blizzard.int_ctrl = fbdev->int_ctrl;
1510
1511         omapfb_conf = fbdev->dev->platform_data;
1512         ctrl_conf = omapfb_conf->ctrl_platform_data;
1513         if (ctrl_conf == NULL || ctrl_conf->get_clock_rate == NULL) {
1514                 dev_err(fbdev->dev, "s1d1374x: missing platform data\n");
1515                 r = -ENOENT;
1516                 goto err1;
1517         }
1518
1519         blizzard.power_down = ctrl_conf->power_down;
1520         blizzard.power_up = ctrl_conf->power_up;
1521
1522         spin_lock_init(&blizzard.req_lock);
1523
1524         if ((r = blizzard.int_ctrl->init(fbdev, 1, req_vram)) < 0)
1525                 goto err1;
1526
1527         if ((r = blizzard.extif->init(fbdev)) < 0)
1528                 goto err2;
1529
1530         blizzard_ctrl.set_color_key = blizzard.int_ctrl->set_color_key;
1531         blizzard_ctrl.get_color_key = blizzard.int_ctrl->get_color_key;
1532         blizzard_ctrl.setup_mem = blizzard.int_ctrl->setup_mem;
1533         blizzard_ctrl.mmap = blizzard.int_ctrl->mmap;
1534
1535         ext_clk = ctrl_conf->get_clock_rate(fbdev->dev);
1536         if ((r = calc_extif_timings(ext_clk, &extif_div)) < 0)
1537                 goto err3;
1538
1539         set_extif_timings(&blizzard.reg_timings);
1540
1541         if (blizzard.power_up != NULL)
1542                 blizzard.power_up(fbdev->dev);
1543
1544         calc_blizzard_clk_rates(ext_clk, &sys_clk, &pix_clk);
1545
1546         if ((r = calc_extif_timings(sys_clk, &extif_div)) < 0)
1547                 goto err3;
1548         set_extif_timings(&blizzard.reg_timings);
1549
1550         if (!(blizzard_read_reg(BLIZZARD_PLL_DIV) & 0x80)) {
1551                 dev_err(fbdev->dev,
1552                         "controller not initialized by the bootloader\n");
1553                 r = -ENODEV;
1554                 goto err3;
1555         }
1556
1557         if (ctrl_conf->te_connected) {
1558                 if ((r = setup_tearsync(pix_clk, extif_div)) < 0)
1559                         goto err3;
1560                 blizzard.te_connected = 1;
1561         }
1562
1563         rev = blizzard_read_reg(BLIZZARD_REV_CODE);
1564         conf = blizzard_read_reg(BLIZZARD_CONFIG);
1565
1566         switch (rev & 0xfc) {
1567         case 0x9c:
1568                 blizzard.version = BLIZZARD_VERSION_S1D13744;
1569                 pr_info("omapfb: s1d13744 LCD controller rev %d "
1570                         "initialized (CNF pins %x)\n", rev & 0x03, conf & 0x07);
1571                 break;
1572         case 0xa4:
1573                 blizzard.version = BLIZZARD_VERSION_S1D13745;
1574                 pr_info("omapfb: s1d13745 LCD controller rev %d "
1575                         "initialized (CNF pins %x)\n", rev & 0x03, conf & 0x07);
1576                 break;
1577         default:
1578                 dev_err(fbdev->dev, "invalid s1d1374x revision %02x\n",
1579                         rev);
1580                 r = -ENODEV;
1581                 goto err3;
1582         }
1583
1584         blizzard.max_transmit_size = blizzard.extif->max_transmit_size;
1585
1586         blizzard.update_mode = OMAPFB_UPDATE_DISABLED;
1587
1588         blizzard.auto_update_window.x = 0;
1589         blizzard.auto_update_window.y = 0;
1590         blizzard.auto_update_window.width = fbdev->panel->x_res;
1591         blizzard.auto_update_window.height = fbdev->panel->y_res;
1592         blizzard.auto_update_window.out_x = 0;
1593         blizzard.auto_update_window.out_x = 0;
1594         blizzard.auto_update_window.out_width = fbdev->panel->x_res;
1595         blizzard.auto_update_window.out_height = fbdev->panel->y_res;
1596         blizzard.auto_update_window.format = 0;
1597
1598         blizzard.screen_width = fbdev->panel->x_res;
1599         blizzard.screen_height = fbdev->panel->y_res;
1600
1601         init_timer(&blizzard.auto_update_timer);
1602         blizzard.auto_update_timer.function = blizzard_update_window_auto;
1603         blizzard.auto_update_timer.data = 0;
1604
1605         INIT_LIST_HEAD(&blizzard.free_req_list);
1606         INIT_LIST_HEAD(&blizzard.pending_req_list);
1607         for (i = 0; i < ARRAY_SIZE(blizzard.req_pool); i++)
1608                 list_add(&blizzard.req_pool[i].entry, &blizzard.free_req_list);
1609         BUG_ON(i <= IRQ_REQ_POOL_SIZE);
1610         sema_init(&blizzard.req_sema, i - IRQ_REQ_POOL_SIZE);
1611
1612         return 0;
1613 err3:
1614         if (blizzard.power_down != NULL)
1615                 blizzard.power_down(fbdev->dev);
1616         blizzard.extif->cleanup();
1617 err2:
1618         blizzard.int_ctrl->cleanup();
1619 err1:
1620         return r;
1621 }
1622
1623 static void blizzard_cleanup(void)
1624 {
1625         blizzard_set_update_mode(OMAPFB_UPDATE_DISABLED);
1626         blizzard.extif->cleanup();
1627         blizzard.int_ctrl->cleanup();
1628         if (blizzard.power_down != NULL)
1629                 blizzard.power_down(blizzard.fbdev->dev);
1630 }
1631
1632 struct lcd_ctrl blizzard_ctrl = {
1633         .name                   = "blizzard",
1634         .init                   = blizzard_init,
1635         .cleanup                = blizzard_cleanup,
1636         .bind_client            = blizzard_bind_client,
1637         .get_caps               = blizzard_get_caps,
1638         .set_update_mode        = blizzard_set_update_mode,
1639         .get_update_mode        = blizzard_get_update_mode,
1640         .setup_plane            = blizzard_setup_plane,
1641         .set_scale              = blizzard_set_scale,
1642         .enable_plane           = blizzard_enable_plane,
1643         .set_rotate             = blizzard_set_rotate,
1644         .update_window          = blizzard_update_window_async,
1645         .sync                   = blizzard_sync,
1646         .suspend                = blizzard_suspend,
1647         .resume                 = blizzard_resume,
1648 };
1649