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 <plat/dma.h>
  30 #include <plat/blizzard.h>
  31
  32 #include "omapfb.h"
  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 const 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 const 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         const 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_move(&req->entry, &blizzard.free_req_list);
 401         if (!(req->flags & REQ_FROM_IRQ_POOL))
 402                 up(&blizzard.req_sema);
 403
 404         spin_unlock_irqrestore(&blizzard.req_lock, flags);
 405 }
 406
 407 static void process_pending_requests(void)
 408 {
 409         unsigned long flags;
 410
 411         spin_lock_irqsave(&blizzard.req_lock, flags);
 412
 413         while (!list_empty(&blizzard.pending_req_list)) {
 414                 struct blizzard_request *req;
 415                 void (*complete)(void *);
 416                 void *complete_data;
 417
 418                 req = list_entry(blizzard.pending_req_list.next,
 419                                  struct blizzard_request, entry);
 420                 spin_unlock_irqrestore(&blizzard.req_lock, flags);
 421
 422                 if (req->handler(req) == REQ_PENDING)
 423                         return;
 424
 425                 complete = req->complete;
 426                 complete_data = req->complete_data;
 427                 free_req(req);
 428
 429                 if (complete)
 430                         complete(complete_data);
 431
 432                 spin_lock_irqsave(&blizzard.req_lock, flags);
 433         }
 434
 435         spin_unlock_irqrestore(&blizzard.req_lock, flags);
 436 }
 437
 438 static void submit_req_list(struct list_head *head)
 439 {
 440         unsigned long flags;
 441         int process = 1;
 442
 443         spin_lock_irqsave(&blizzard.req_lock, flags);
 444         if (likely(!list_empty(&blizzard.pending_req_list)))
 445                 process = 0;
 446         list_splice_init(head, blizzard.pending_req_list.prev);
 447         spin_unlock_irqrestore(&blizzard.req_lock, flags);
 448
 449         if (process)
 450                 process_pending_requests();
 451 }
 452
 453 static void request_complete(void *data)
 454 {
 455         struct blizzard_request *req = (struct blizzard_request *)data;
 456         void                    (*complete)(void *);
 457         void                    *complete_data;
 458
 459         complete = req->complete;
 460         complete_data = req->complete_data;
 461
 462         free_req(req);
 463
 464         if (complete)
 465                 complete(complete_data);
 466
 467         process_pending_requests();
 468 }
 469
 470
 471 static int do_full_screen_update(struct blizzard_request *req)
 472 {
 473         int i;
 474         int flags;
 475
 476         for (i = 0; i < 3; i++) {
 477                 struct plane_info *p = &blizzard.plane[i];
 478                 if (!(blizzard.enabled_planes & (1 << i))) {
 479                         blizzard.int_ctrl->enable_plane(i, 0);
 480                         continue;
 481                 }
 482                 dev_dbg(blizzard.fbdev->dev, "pw %d ph %d\n",
 483                         p->width, p->height);
 484                 blizzard.int_ctrl->setup_plane(i,
 485                                 OMAPFB_CHANNEL_OUT_LCD, p->offset,
 486                                 p->scr_width, p->pos_x, p->pos_y,
 487                                 p->width, p->height,
 488                                 p->color_mode);
 489                 blizzard.int_ctrl->enable_plane(i, 1);
 490         }
 491
 492         dev_dbg(blizzard.fbdev->dev, "sw %d sh %d\n",
 493                 blizzard.screen_width, blizzard.screen_height);
 494         blizzard_wait_line_buffer();
 495         flags = req->par.update.flags;
 496         if (flags & OMAPFB_FORMAT_FLAG_TEARSYNC)
 497                 enable_tearsync(0, blizzard.screen_width,
 498                                 blizzard.screen_height,
 499                                 blizzard.screen_height,
 500                                 blizzard.screen_height,
 501                                 flags & OMAPFB_FORMAT_FLAG_FORCE_VSYNC);
 502         else
 503                 disable_tearsync();
 504
 505         set_window_regs(0, 0, blizzard.screen_width, blizzard.screen_height,
 506                         0, 0, blizzard.screen_width, blizzard.screen_height,
 507                         BLIZZARD_COLOR_RGB565, blizzard.zoom_on, flags);
 508         blizzard.zoom_on = 0;
 509
 510         blizzard.extif->set_bits_per_cycle(16);
 511         /* set_window_regs has left the register index at the right
 512          * place, so no need to set it here.
 513          */
 514         blizzard.extif->transfer_area(blizzard.screen_width,
 515                                       blizzard.screen_height,
 516                                       request_complete, req);
 517         return REQ_PENDING;
 518 }
 519
 520 static int check_1d_intersect(int a1, int a2, int b1, int b2)
 521 {
 522         if (a2 <= b1 || b2 <= a1)
 523                 return 0;
 524         return 1;
 525 }
 526
 527 /* Setup all planes with an overlapping area with the update window. */
 528 static int do_partial_update(struct blizzard_request *req, int plane,
 529                              int x, int y, int w, int h,
 530                              int x_out, int y_out, int w_out, int h_out,
 531                              int wnd_color_mode, int bpp)
 532 {
 533         int i;
 534         int gx1, gy1, gx2, gy2;
 535         int gx1_out, gy1_out, gx2_out, gy2_out;
 536         int color_mode;
 537         int flags;
 538         int zoom_off;
 539         int have_zoom_for_this_update = 0;
 540
 541         /* Global coordinates, relative to pixel 0,0 of the LCD */
 542         gx1 = x + blizzard.plane[plane].pos_x;
 543         gy1 = y + blizzard.plane[plane].pos_y;
 544         gx2 = gx1 + w;
 545         gy2 = gy1 + h;
 546
 547         flags = req->par.update.flags;
 548         if (flags & OMAPFB_FORMAT_FLAG_DOUBLE) {
 549                 gx1_out = gx1;
 550                 gy1_out = gy1;
 551                 gx2_out = gx1 + w * 2;
 552                 gy2_out = gy1 + h * 2;
 553         } else {
 554                 gx1_out = x_out + blizzard.plane[plane].pos_x;
 555                 gy1_out = y_out + blizzard.plane[plane].pos_y;
 556                 gx2_out = gx1_out + w_out;
 557                 gy2_out = gy1_out + h_out;
 558         }
 559
 560         for (i = 0; i < OMAPFB_PLANE_NUM; i++) {
 561                 struct plane_info *p = &blizzard.plane[i];
 562                 int px1, py1;
 563                 int px2, py2;
 564                 int pw, ph;
 565                 int pposx, pposy;
 566                 unsigned long offset;
 567
 568                 if (!(blizzard.enabled_planes & (1 << i))  ||
 569                     (wnd_color_mode && i != plane)) {
 570                         blizzard.int_ctrl->enable_plane(i, 0);
 571                         continue;
 572                 }
 573                 /* Plane coordinates */
 574                 if (i == plane) {
 575                         /* Plane in which we are doing the update.
 576                          * Local coordinates are the one in the update
 577                          * request.
 578                          */
 579                         px1 = x;
 580                         py1 = y;
 581                         px2 = x + w;
 582                         py2 = y + h;
 583                         pposx = 0;
 584                         pposy = 0;
 585                 } else {
 586                         /* Check if this plane has an overlapping part */
 587                         px1 = gx1 - p->pos_x;
 588                         py1 = gy1 - p->pos_y;
 589                         px2 = gx2 - p->pos_x;
 590                         py2 = gy2 - p->pos_y;
 591                         if (px1 >= p->width || py1 >= p->height ||
 592                             px2 <= 0 || py2 <= 0) {
 593                                 blizzard.int_ctrl->enable_plane(i, 0);
 594                                 continue;
 595                         }
 596                         /* Calculate the coordinates for the overlapping
 597                          * part in the plane's local coordinates.
 598                          */
 599                         pposx = -px1;
 600                         pposy = -py1;
 601                         if (px1 < 0)
 602                                 px1 = 0;
 603                         if (py1 < 0)
 604                                 py1 = 0;
 605                         if (px2 > p->width)
 606                                 px2 = p->width;
 607                         if (py2 > p->height)
 608                                 py2 = p->height;
 609                         if (pposx < 0)
 610                                 pposx = 0;
 611                         if (pposy < 0)
 612                                 pposy = 0;
 613                 }
 614                 pw = px2 - px1;
 615                 ph = py2 - py1;
 616                 offset = p->offset + (p->scr_width * py1 + px1) * p->bpp / 8;
 617                 if (wnd_color_mode)
 618                         /* Window embedded in the plane with a differing
 619                          * color mode / bpp. Calculate the number of DMA
 620                          * transfer elements in terms of the plane's bpp.
 621                          */
 622                         pw = (pw + 1) * bpp / p->bpp;
 623 #ifdef VERBOSE
 624                 dev_dbg(blizzard.fbdev->dev,
 625                         "plane %d offset %#08lx pposx %d pposy %d "
 626                         "px1 %d py1 %d pw %d ph %d\n",
 627                         i, offset, pposx, pposy, px1, py1, pw, ph);
 628 #endif
 629                 blizzard.int_ctrl->setup_plane(i,
 630                                 OMAPFB_CHANNEL_OUT_LCD, offset,
 631                                 p->scr_width,
 632                                 pposx, pposy, pw, ph,
 633                                 p->color_mode);
 634
 635                 blizzard.int_ctrl->enable_plane(i, 1);
 636         }
 637
 638         switch (wnd_color_mode) {
 639         case OMAPFB_COLOR_YUV420:
 640                 color_mode = BLIZZARD_COLOR_YUV420;
 641                 /* Currently only the 16 bits/pixel cycle format is
 642                  * supported on the external interface. Adjust the number
 643                  * of transfer elements per line for 12bpp format.
 644                  */
 645                 w = (w + 1) * 3 / 4;
 646                 break;
 647         default:
 648                 color_mode = BLIZZARD_COLOR_RGB565;
 649                 break;
 650         }
 651
 652         blizzard_wait_line_buffer();
 653         if (blizzard.last_color_mode == BLIZZARD_COLOR_YUV420)
 654                 blizzard_wait_yyc();
 655         blizzard.last_color_mode = color_mode;
 656         if (flags & OMAPFB_FORMAT_FLAG_TEARSYNC)
 657                 enable_tearsync(gy1, w, h,
 658                                 blizzard.screen_height,
 659                                 h_out,
 660                                 flags & OMAPFB_FORMAT_FLAG_FORCE_VSYNC);
 661         else
 662                 disable_tearsync();
 663
 664         if ((gx2_out - gx1_out) != (gx2 - gx1) ||
 665             (gy2_out - gy1_out) != (gy2 - gy1))
 666                 have_zoom_for_this_update = 1;
 667
 668         /* 'background' type of screen update (as opposed to 'destructive')
 669            can be used to disable scaling if scaling is active */
 670         zoom_off = blizzard.zoom_on && !have_zoom_for_this_update &&
 671             (gx1_out == 0) && (gx2_out == blizzard.screen_width) &&
 672             (gy1_out == 0) && (gy2_out == blizzard.screen_height) &&
 673             (gx1 == 0) && (gy1 == 0);
 674
 675         if (blizzard.zoom_on && !have_zoom_for_this_update && !zoom_off &&
 676             check_1d_intersect(blizzard.zoom_area_gx1, blizzard.zoom_area_gx2,
 677                                gx1_out, gx2_out) &&
 678             check_1d_intersect(blizzard.zoom_area_gy1, blizzard.zoom_area_gy2,
 679                                gy1_out, gy2_out)) {
 680                 /* Previous screen update was using scaling, current update
 681                  * is not using it. Additionally, current screen update is
 682                  * going to overlap with the scaled area. Scaling needs to be
 683                  * disabled in order to avoid 'magnifying glass' effect.
 684                  * Dummy setup of background window can be used for this.
 685                  */
 686                 set_window_regs(0, 0, blizzard.screen_width,
 687                                 blizzard.screen_height,
 688                                 0, 0, blizzard.screen_width,
 689                                 blizzard.screen_height,
 690                                 BLIZZARD_COLOR_RGB565, 1, flags);
 691                 blizzard.zoom_on = 0;
 692         }
 693
 694         /* remember scaling settings if we have scaled update */
 695         if (have_zoom_for_this_update) {
 696                 blizzard.zoom_on = 1;
 697                 blizzard.zoom_area_gx1 = gx1_out;
 698                 blizzard.zoom_area_gx2 = gx2_out;
 699                 blizzard.zoom_area_gy1 = gy1_out;
 700                 blizzard.zoom_area_gy2 = gy2_out;
 701         }
 702
 703         set_window_regs(gx1, gy1, gx2, gy2, gx1_out, gy1_out, gx2_out, gy2_out,
 704                         color_mode, zoom_off, flags);
 705         if (zoom_off)
 706                 blizzard.zoom_on = 0;
 707
 708         blizzard.extif->set_bits_per_cycle(16);
 709         /* set_window_regs has left the register index at the right
 710          * place, so no need to set it here.
 711          */
 712         blizzard.extif->transfer_area(w, h, request_complete, req);
 713
 714         return REQ_PENDING;
 715 }
 716
 717 static int send_frame_handler(struct blizzard_request *req)
 718 {
 719         struct update_param *par = &req->par.update;
 720         int plane = par->plane;
 721
 722 #ifdef VERBOSE
 723         dev_dbg(blizzard.fbdev->dev,
 724                 "send_frame: x %d y %d w %d h %d "
 725                 "x_out %d y_out %d w_out %d h_out %d "
 726                 "color_mode %04x flags %04x planes %01x\n",
 727                 par->x, par->y, par->width, par->height,
 728                 par->out_x, par->out_y, par->out_width, par->out_height,
 729                 par->color_mode, par->flags, blizzard.enabled_planes);
 730 #endif
 731         if (par->flags & OMAPFB_FORMAT_FLAG_DISABLE_OVERLAY)
 732                 disable_overlay();
 733
 734         if ((blizzard.enabled_planes & blizzard.vid_nonstd_color) ||
 735              (blizzard.enabled_planes & blizzard.vid_scaled))
 736                 return do_full_screen_update(req);
 737
 738         return do_partial_update(req, plane, par->x, par->y,
 739                                  par->width, par->height,
 740                                  par->out_x, par->out_y,
 741                                  par->out_width, par->out_height,
 742                                  par->color_mode, par->bpp);
 743 }
 744
 745 static void send_frame_complete(void *data)
 746 {
 747 }
 748
 749 #define ADD_PREQ(_x, _y, _w, _h, _x_out, _y_out, _w_out, _h_out) do {   \
 750         req = alloc_req();                      \
 751         req->handler    = send_frame_handler;   \
 752         req->complete   = send_frame_complete;  \
 753         req->par.update.plane = plane_idx;      \
 754         req->par.update.x = _x;                 \
 755         req->par.update.y = _y;                 \
 756         req->par.update.width  = _w;            \
 757         req->par.update.height = _h;            \
 758         req->par.update.out_x = _x_out;         \
 759         req->par.update.out_y = _y_out;         \
 760         req->par.update.out_width = _w_out;     \
 761         req->par.update.out_height = _h_out;    \
 762         req->par.update.bpp = bpp;              \
 763         req->par.update.color_mode = color_mode;\
 764         req->par.update.flags     = flags;      \
 765         list_add_tail(&req->entry, req_head);   \
 766 } while(0)
 767
 768 static void create_req_list(int plane_idx,
 769                             struct omapfb_update_window *win,
 770                             struct list_head *req_head)
 771 {
 772         struct blizzard_request *req;
 773         int x = win->x;
 774         int y = win->y;
 775         int width = win->width;
 776         int height = win->height;
 777         int x_out = win->out_x;
 778         int y_out = win->out_y;
 779         int width_out = win->out_width;
 780         int height_out = win->out_height;
 781         int color_mode;
 782         int bpp;
 783         int flags;
 784         unsigned int ystart = y;
 785         unsigned int yspan = height;
 786         unsigned int ystart_out = y_out;
 787         unsigned int yspan_out = height_out;
 788
 789         flags = win->format & ~OMAPFB_FORMAT_MASK;
 790         color_mode = win->format & OMAPFB_FORMAT_MASK;
 791         switch (color_mode) {
 792         case OMAPFB_COLOR_YUV420:
 793                 /* Embedded window with different color mode */
 794                 bpp = 12;
 795                 /* X, Y, height must be aligned at 2, width at 4 pixels */
 796                 x &= ~1;
 797                 y &= ~1;
 798                 height = yspan = height & ~1;
 799                 width = width & ~3;
 800                 break;
 801         default:
 802                 /* Same as the plane color mode */
 803                 bpp = blizzard.plane[plane_idx].bpp;
 804                 break;
 805         }
 806         if (width * height * bpp / 8 > blizzard.max_transmit_size) {
 807                 yspan = blizzard.max_transmit_size / (width * bpp / 8);
 808                 yspan_out = yspan * height_out / height;
 809                 ADD_PREQ(x, ystart, width, yspan, x_out, ystart_out,
 810                          width_out, yspan_out);
 811                 ystart += yspan;
 812                 ystart_out += yspan_out;
 813                 yspan = height - yspan;
 814                 yspan_out = height_out - yspan_out;
 815                 flags &= ~OMAPFB_FORMAT_FLAG_TEARSYNC;
 816         }
 817
 818         ADD_PREQ(x, ystart, width, yspan, x_out, ystart_out,
 819                  width_out, yspan_out);
 820 }
 821
 822 static void auto_update_complete(void *data)
 823 {
 824         if (!blizzard.stop_auto_update)
 825                 mod_timer(&blizzard.auto_update_timer,
 826                           jiffies + BLIZZARD_AUTO_UPDATE_TIME);
 827 }
 828
 829 static void blizzard_update_window_auto(unsigned long arg)
 830 {
 831         LIST_HEAD(req_list);
 832         struct blizzard_request *last;
 833         struct omapfb_plane_struct *plane;
 834
 835         plane = blizzard.fbdev->fb_info[0]->par;
 836         create_req_list(plane->idx,
 837                         &blizzard.auto_update_window, &req_list);
 838         last = list_entry(req_list.prev, struct blizzard_request, entry);
 839
 840         last->complete = auto_update_complete;
 841         last->complete_data = NULL;
 842
 843         submit_req_list(&req_list);
 844 }
 845
 846 int blizzard_update_window_async(struct fb_info *fbi,
 847                                  struct omapfb_update_window *win,
 848                                  void (*complete_callback)(void *arg),
 849                                  void *complete_callback_data)
 850 {
 851         LIST_HEAD(req_list);
 852         struct blizzard_request *last;
 853         struct omapfb_plane_struct *plane = fbi->par;
 854
 855         if (unlikely(blizzard.update_mode != OMAPFB_MANUAL_UPDATE))
 856                 return -EINVAL;
 857         if (unlikely(!blizzard.te_connected &&
 858                      (win->format & OMAPFB_FORMAT_FLAG_TEARSYNC)))
 859                 return -EINVAL;
 860
 861         create_req_list(plane->idx, win, &req_list);
 862         last = list_entry(req_list.prev, struct blizzard_request, entry);
 863
 864         last->complete = complete_callback;
 865         last->complete_data = (void *)complete_callback_data;
 866
 867         submit_req_list(&req_list);
 868
 869         return 0;
 870 }
 871 EXPORT_SYMBOL(blizzard_update_window_async);
 872
 873 static int update_full_screen(void)
 874 {
 875         return blizzard_update_window_async(blizzard.fbdev->fb_info[0],
 876                                      &blizzard.auto_update_window, NULL, NULL);
 877
 878 }
 879
 880 static int blizzard_setup_plane(int plane, int channel_out,
 881                                   unsigned long offset, int screen_width,
 882                                   int pos_x, int pos_y, int width, int height,
 883                                   int color_mode)
 884 {
 885         struct plane_info *p;
 886
 887 #ifdef VERBOSE
 888         dev_dbg(blizzard.fbdev->dev,
 889                     "plane %d ch_out %d offset %#08lx scr_width %d "
 890                     "pos_x %d pos_y %d width %d height %d color_mode %d\n",
 891                     plane, channel_out, offset, screen_width,
 892                     pos_x, pos_y, width, height, color_mode);
 893 #endif
 894         if ((unsigned)plane > OMAPFB_PLANE_NUM)
 895                 return -EINVAL;
 896         p = &blizzard.plane[plane];
 897
 898         switch (color_mode) {
 899         case OMAPFB_COLOR_YUV422:
 900         case OMAPFB_COLOR_YUY422:
 901                 p->bpp = 16;
 902                 blizzard.vid_nonstd_color &= ~(1 << plane);
 903                 break;
 904         case OMAPFB_COLOR_YUV420:
 905                 p->bpp = 12;
 906                 blizzard.vid_nonstd_color |= 1 << plane;
 907                 break;
 908         case OMAPFB_COLOR_RGB565:
 909                 p->bpp = 16;
 910                 blizzard.vid_nonstd_color &= ~(1 << plane);
 911                 break;
 912         default:
 913                 return -EINVAL;
 914         }
 915
 916         p->offset = offset;
 917         p->pos_x = pos_x;
 918         p->pos_y = pos_y;
 919         p->width = width;
 920         p->height = height;
 921         p->scr_width = screen_width;
 922         if (!p->out_width)
 923                 p->out_width = width;
 924         if (!p->out_height)
 925                 p->out_height = height;
 926
 927         p->color_mode = color_mode;
 928
 929         return 0;
 930 }
 931
 932 static int blizzard_set_scale(int plane, int orig_w, int orig_h,
 933                               int out_w, int out_h)
 934 {
 935         struct plane_info *p = &blizzard.plane[plane];
 936         int r;
 937
 938         dev_dbg(blizzard.fbdev->dev,
 939                 "plane %d orig_w %d orig_h %d out_w %d out_h %d\n",
 940                 plane, orig_w, orig_h, out_w, out_h);
 941         if ((unsigned)plane > OMAPFB_PLANE_NUM)
 942                 return -ENODEV;
 943
 944         r = blizzard.int_ctrl->set_scale(plane, orig_w, orig_h, out_w, out_h);
 945         if (r < 0)
 946                 return r;
 947
 948         p->width = orig_w;
 949         p->height = orig_h;
 950         p->out_width = out_w;
 951         p->out_height = out_h;
 952         if (orig_w == out_w && orig_h == out_h)
 953                 blizzard.vid_scaled &= ~(1 << plane);
 954         else
 955                 blizzard.vid_scaled |= 1 << plane;
 956
 957         return 0;
 958 }
 959
 960 static int blizzard_set_rotate(int angle)
 961 {
 962         u32 l;
 963
 964         l = blizzard_read_reg(BLIZZARD_PANEL_CONFIGURATION);
 965         l &= ~0x03;
 966
 967         switch (angle) {
 968         case 0:
 969                 l = l | 0x00;
 970                 break;
 971         case 90:
 972                 l = l | 0x03;
 973                 break;
 974         case 180:
 975                 l = l | 0x02;
 976                 break;
 977         case 270:
 978                 l = l | 0x01;
 979                 break;
 980         default:
 981                 return -EINVAL;
 982         }
 983
 984         blizzard_write_reg(BLIZZARD_PANEL_CONFIGURATION, l);
 985
 986         return 0;
 987 }
 988
 989 static int blizzard_enable_plane(int plane, int enable)
 990 {
 991         if (enable)
 992                 blizzard.enabled_planes |= 1 << plane;
 993         else
 994                 blizzard.enabled_planes &= ~(1 << plane);
 995
 996         return 0;
 997 }
 998
 999 static int sync_handler(struct blizzard_request *req)
1000 {
1001         complete(req->par.sync);
1002         return REQ_COMPLETE;
1003 }
1004
1005 static void blizzard_sync(void)
1006 {
1007         LIST_HEAD(req_list);
1008         struct blizzard_request *req;
1009         struct completion comp;
1010
1011         req = alloc_req();
1012
1013         req->handler = sync_handler;
1014         req->complete = NULL;
1015         init_completion(&comp);
1016         req->par.sync = &comp;
1017
1018         list_add(&req->entry, &req_list);
1019         submit_req_list(&req_list);
1020
1021         wait_for_completion(&comp);
1022 }
1023
1024
1025 static void blizzard_bind_client(struct omapfb_notifier_block *nb)
1026 {
1027         if (blizzard.update_mode == OMAPFB_MANUAL_UPDATE) {
1028                 omapfb_notify_clients(blizzard.fbdev, OMAPFB_EVENT_READY);
1029         }
1030 }
1031
1032 static int blizzard_set_update_mode(enum omapfb_update_mode mode)
1033 {
1034         if (unlikely(mode != OMAPFB_MANUAL_UPDATE &&
1035                      mode != OMAPFB_AUTO_UPDATE &&
1036                      mode != OMAPFB_UPDATE_DISABLED))
1037                 return -EINVAL;
1038
1039         if (mode == blizzard.update_mode)
1040                 return 0;
1041
1042         dev_info(blizzard.fbdev->dev, "s1d1374x: setting update mode to %s\n",
1043                         mode == OMAPFB_UPDATE_DISABLED ? "disabled" :
1044                         (mode == OMAPFB_AUTO_UPDATE ? "auto" : "manual"));
1045
1046         switch (blizzard.update_mode) {
1047         case OMAPFB_MANUAL_UPDATE:
1048                 omapfb_notify_clients(blizzard.fbdev, OMAPFB_EVENT_DISABLED);
1049                 break;
1050         case OMAPFB_AUTO_UPDATE:
1051                 blizzard.stop_auto_update = 1;
1052                 del_timer_sync(&blizzard.auto_update_timer);
1053                 break;
1054         case OMAPFB_UPDATE_DISABLED:
1055                 break;
1056         }
1057
1058         blizzard.update_mode = mode;
1059         blizzard_sync();
1060         blizzard.stop_auto_update = 0;
1061
1062         switch (mode) {
1063         case OMAPFB_MANUAL_UPDATE:
1064                 omapfb_notify_clients(blizzard.fbdev, OMAPFB_EVENT_READY);
1065                 break;
1066         case OMAPFB_AUTO_UPDATE:
1067                 blizzard_update_window_auto(0);
1068                 break;
1069         case OMAPFB_UPDATE_DISABLED:
1070                 break;
1071         }
1072
1073         return 0;
1074 }
1075
1076 static enum omapfb_update_mode blizzard_get_update_mode(void)
1077 {
1078         return blizzard.update_mode;
1079 }
1080
1081 static inline void set_extif_timings(const struct extif_timings *t)
1082 {
1083         blizzard.extif->set_timings(t);
1084 }
1085
1086 static inline unsigned long round_to_extif_ticks(unsigned long ps, int div)
1087 {
1088         int bus_tick = blizzard.extif_clk_period * div;
1089         return (ps + bus_tick - 1) / bus_tick * bus_tick;
1090 }
1091
1092 static int calc_reg_timing(unsigned long sysclk, int div)
1093 {
1094         struct extif_timings *t;
1095         unsigned long systim;
1096
1097         /* CSOnTime 0, WEOnTime 2 ns, REOnTime 2 ns,
1098          * AccessTime 2 ns + 12.2 ns (regs),
1099          * WEOffTime = WEOnTime + 1 ns,
1100          * REOffTime = REOnTime + 12 ns (regs),
1101          * CSOffTime = REOffTime + 1 ns
1102          * ReadCycle = 2ns + 2*SYSCLK  (regs),
1103          * WriteCycle = 2*SYSCLK + 2 ns,
1104          * CSPulseWidth = 10 ns */
1105
1106         systim = 1000000000 / (sysclk / 1000);
1107         dev_dbg(blizzard.fbdev->dev,
1108                   "Blizzard systim %lu ps extif_clk_period %u div %d\n",
1109                   systim, blizzard.extif_clk_period, div);
1110
1111         t = &blizzard.reg_timings;
1112         memset(t, 0, sizeof(*t));
1113
1114         t->clk_div = div;
1115
1116         t->cs_on_time = 0;
1117         t->we_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div);
1118         t->re_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div);
1119         t->access_time = round_to_extif_ticks(t->re_on_time + 12200, div);
1120         t->we_off_time = round_to_extif_ticks(t->we_on_time + 1000, div);
1121         t->re_off_time = round_to_extif_ticks(t->re_on_time + 13000, div);
1122         t->cs_off_time = round_to_extif_ticks(t->re_off_time + 1000, div);
1123         t->we_cycle_time = round_to_extif_ticks(2 * systim + 2000, div);
1124         if (t->we_cycle_time < t->we_off_time)
1125                 t->we_cycle_time = t->we_off_time;
1126         t->re_cycle_time = round_to_extif_ticks(2 * systim + 2000, div);
1127         if (t->re_cycle_time < t->re_off_time)
1128                 t->re_cycle_time = t->re_off_time;
1129         t->cs_pulse_width = 0;
1130
1131         dev_dbg(blizzard.fbdev->dev, "[reg]cson %d csoff %d reon %d reoff %d\n",
1132                  t->cs_on_time, t->cs_off_time, t->re_on_time, t->re_off_time);
1133         dev_dbg(blizzard.fbdev->dev, "[reg]weon %d weoff %d recyc %d wecyc %d\n",
1134                  t->we_on_time, t->we_off_time, t->re_cycle_time,
1135                  t->we_cycle_time);
1136         dev_dbg(blizzard.fbdev->dev, "[reg]rdaccess %d cspulse %d\n",
1137                  t->access_time, t->cs_pulse_width);
1138
1139         return blizzard.extif->convert_timings(t);
1140 }
1141
1142 static int calc_lut_timing(unsigned long sysclk, int div)
1143 {
1144         struct extif_timings *t;
1145         unsigned long systim;
1146
1147         /* CSOnTime 0, WEOnTime 2 ns, REOnTime 2 ns,
1148          * AccessTime 2 ns + 4 * SYSCLK + 26 (lut),
1149          * WEOffTime = WEOnTime + 1 ns,
1150          * REOffTime = REOnTime + 4*SYSCLK + 26 ns (lut),
1151          * CSOffTime = REOffTime + 1 ns
1152          * ReadCycle = 2ns + 4*SYSCLK + 26 ns (lut),
1153          * WriteCycle = 2*SYSCLK + 2 ns,
1154          * CSPulseWidth = 10 ns */
1155
1156         systim = 1000000000 / (sysclk / 1000);
1157         dev_dbg(blizzard.fbdev->dev,
1158                 "Blizzard systim %lu ps extif_clk_period %u div %d\n",
1159                 systim, blizzard.extif_clk_period, div);
1160
1161         t = &blizzard.lut_timings;
1162         memset(t, 0, sizeof(*t));
1163
1164         t->clk_div = div;
1165
1166         t->cs_on_time = 0;
1167         t->we_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div);
1168         t->re_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div);
1169         t->access_time = round_to_extif_ticks(t->re_on_time + 4 * systim +
1170                                               26000, div);
1171         t->we_off_time = round_to_extif_ticks(t->we_on_time + 1000, div);
1172         t->re_off_time = round_to_extif_ticks(t->re_on_time + 4 * systim +
1173                                               26000, div);
1174         t->cs_off_time = round_to_extif_ticks(t->re_off_time + 1000, div);
1175         t->we_cycle_time = round_to_extif_ticks(2 * systim + 2000, div);
1176         if (t->we_cycle_time < t->we_off_time)
1177                 t->we_cycle_time = t->we_off_time;
1178         t->re_cycle_time = round_to_extif_ticks(2000 + 4 * systim + 26000, div);
1179         if (t->re_cycle_time < t->re_off_time)
1180                 t->re_cycle_time = t->re_off_time;
1181         t->cs_pulse_width = 0;
1182
1183         dev_dbg(blizzard.fbdev->dev,
1184                  "[lut]cson %d csoff %d reon %d reoff %d\n",
1185                  t->cs_on_time, t->cs_off_time, t->re_on_time, t->re_off_time);
1186         dev_dbg(blizzard.fbdev->dev,
1187                  "[lut]weon %d weoff %d recyc %d wecyc %d\n",
1188                  t->we_on_time, t->we_off_time, t->re_cycle_time,
1189                  t->we_cycle_time);
1190         dev_dbg(blizzard.fbdev->dev, "[lut]rdaccess %d cspulse %d\n",
1191                  t->access_time, t->cs_pulse_width);
1192
1193         return blizzard.extif->convert_timings(t);
1194 }
1195
1196 static int calc_extif_timings(unsigned long sysclk, int *extif_mem_div)
1197 {
1198         int max_clk_div;
1199         int div;
1200
1201         blizzard.extif->get_clk_info(&blizzard.extif_clk_period, &max_clk_div);
1202         for (div = 1; div <= max_clk_div; div++) {
1203                 if (calc_reg_timing(sysclk, div) == 0)
1204                         break;
1205         }
1206         if (div > max_clk_div) {
1207                 dev_dbg(blizzard.fbdev->dev, "reg timing failed\n");
1208                 goto err;
1209         }
1210         *extif_mem_div = div;
1211
1212         for (div = 1; div <= max_clk_div; div++) {
1213                 if (calc_lut_timing(sysclk, div) == 0)
1214                         break;
1215         }
1216
1217         if (div > max_clk_div)
1218                 goto err;
1219
1220         blizzard.extif_clk_div = div;
1221
1222         return 0;
1223 err:
1224         dev_err(blizzard.fbdev->dev, "can't setup timings\n");
1225         return -1;
1226 }
1227
1228 static void calc_blizzard_clk_rates(unsigned long ext_clk,
1229                                 unsigned long *sys_clk, unsigned long *pix_clk)
1230 {
1231         int pix_clk_src;
1232         int sys_div = 0, sys_mul = 0;
1233         int pix_div;
1234
1235         pix_clk_src = blizzard_read_reg(BLIZZARD_CLK_SRC);
1236         pix_div = ((pix_clk_src >> 3) & 0x1f) + 1;
1237         if ((pix_clk_src & (0x3 << 1)) == 0) {
1238                 /* Source is the PLL */
1239                 sys_div = (blizzard_read_reg(BLIZZARD_PLL_DIV) & 0x3f) + 1;
1240                 sys_mul = blizzard_read_reg(BLIZZARD_PLL_CLOCK_SYNTH_0);
1241                 sys_mul |= ((blizzard_read_reg(BLIZZARD_PLL_CLOCK_SYNTH_1)
1242                                 & 0x0f) << 11);
1243                 *sys_clk = ext_clk * sys_mul / sys_div;
1244         } else  /* else source is ext clk, or oscillator */
1245                 *sys_clk = ext_clk;
1246
1247         *pix_clk = *sys_clk / pix_div;                  /* HZ */
1248         dev_dbg(blizzard.fbdev->dev,
1249                 "ext_clk %ld pix_src %d pix_div %d sys_div %d sys_mul %d\n",
1250                 ext_clk, pix_clk_src & (0x3 << 1), pix_div, sys_div, sys_mul);
1251         dev_dbg(blizzard.fbdev->dev, "sys_clk %ld pix_clk %ld\n",
1252                 *sys_clk, *pix_clk);
1253 }
1254
1255 static int setup_tearsync(unsigned long pix_clk, int extif_div)
1256 {
1257         int hdisp, vdisp;
1258         int hndp, vndp;
1259         int hsw, vsw;
1260         int hs, vs;
1261         int hs_pol_inv, vs_pol_inv;
1262         int use_hsvs, use_ndp;
1263         u8  b;
1264
1265         hsw = blizzard_read_reg(BLIZZARD_HSW);
1266         vsw = blizzard_read_reg(BLIZZARD_VSW);
1267         hs_pol_inv = !(hsw & 0x80);
1268         vs_pol_inv = !(vsw & 0x80);
1269         hsw = hsw & 0x7f;
1270         vsw = vsw & 0x3f;
1271
1272         hdisp = blizzard_read_reg(BLIZZARD_HDISP) * 8;
1273         vdisp = blizzard_read_reg(BLIZZARD_VDISP0) +
1274                 ((blizzard_read_reg(BLIZZARD_VDISP1) & 0x3) << 8);
1275
1276         hndp = blizzard_read_reg(BLIZZARD_HNDP) & 0x3f;
1277         vndp = blizzard_read_reg(BLIZZARD_VNDP);
1278
1279         /* time to transfer one pixel (16bpp) in ps */
1280         blizzard.pix_tx_time = blizzard.reg_timings.we_cycle_time;
1281         if (blizzard.extif->get_max_tx_rate != NULL) {
1282                 /* The external interface might have a rate limitation,
1283                  * if so, we have to maximize our transfer rate.
1284                  */
1285                 unsigned long min_tx_time;
1286                 unsigned long max_tx_rate = blizzard.extif->get_max_tx_rate();
1287
1288                 dev_dbg(blizzard.fbdev->dev, "max_tx_rate %ld HZ\n",
1289                         max_tx_rate);
1290                 min_tx_time = 1000000000 / (max_tx_rate / 1000);  /* ps */
1291                 if (blizzard.pix_tx_time < min_tx_time)
1292                         blizzard.pix_tx_time = min_tx_time;
1293         }
1294
1295         /* time to update one line in ps */
1296         blizzard.line_upd_time = (hdisp + hndp) * 1000000 / (pix_clk / 1000);
1297         blizzard.line_upd_time *= 1000;
1298         if (hdisp * blizzard.pix_tx_time > blizzard.line_upd_time)
1299                 /* transfer speed too low, we might have to use both
1300                  * HS and VS */
1301                 use_hsvs = 1;
1302         else
1303                 /* decent transfer speed, we'll always use only VS */
1304                 use_hsvs = 0;
1305
1306         if (use_hsvs && (hs_pol_inv || vs_pol_inv)) {
1307                 /* HS or'ed with VS doesn't work, use the active high
1308                  * TE signal based on HNDP / VNDP */
1309                 use_ndp = 1;
1310                 hs_pol_inv = 0;
1311                 vs_pol_inv = 0;
1312                 hs = hndp;
1313                 vs = vndp;
1314         } else {
1315                 /* Use HS or'ed with VS as a TE signal if both are needed
1316                  * or VNDP if only vsync is needed. */
1317                 use_ndp = 0;
1318                 hs = hsw;
1319                 vs = vsw;
1320                 if (!use_hsvs) {
1321                         hs_pol_inv = 0;
1322                         vs_pol_inv = 0;
1323                 }
1324         }
1325
1326         hs = hs * 1000000 / (pix_clk / 1000);             /* ps */
1327         hs *= 1000;
1328
1329         vs = vs * (hdisp + hndp) * 1000000 / (pix_clk / 1000); /* ps */
1330         vs *= 1000;
1331
1332         if (vs <= hs)
1333                 return -EDOM;
1334         /* set VS to 120% of HS to minimize VS detection time */
1335         vs = hs * 12 / 10;
1336         /* minimize HS too */
1337         if (hs > 10000)
1338                 hs = 10000;
1339
1340         b = blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS);
1341         b &= ~0x3;
1342         b |= use_hsvs ? 1 : 0;
1343         b |= (use_ndp && use_hsvs) ? 0 : 2;
1344         blizzard_write_reg(BLIZZARD_NDISP_CTRL_STATUS, b);
1345
1346         blizzard.vsync_only = !use_hsvs;
1347
1348         dev_dbg(blizzard.fbdev->dev,
1349                 "pix_clk %ld HZ pix_tx_time %ld ps line_upd_time %ld ps\n",
1350                 pix_clk, blizzard.pix_tx_time, blizzard.line_upd_time);
1351         dev_dbg(blizzard.fbdev->dev,
1352                 "hs %d ps vs %d ps mode %d vsync_only %d\n",
1353                 hs, vs, b & 0x3, !use_hsvs);
1354
1355         return blizzard.extif->setup_tearsync(1, hs, vs,
1356                                               hs_pol_inv, vs_pol_inv,
1357                                               extif_div);
1358 }
1359
1360 static void blizzard_get_caps(int plane, struct omapfb_caps *caps)
1361 {
1362         blizzard.int_ctrl->get_caps(plane, caps);
1363         caps->ctrl |= OMAPFB_CAPS_MANUAL_UPDATE |
1364                 OMAPFB_CAPS_WINDOW_PIXEL_DOUBLE |
1365                 OMAPFB_CAPS_WINDOW_SCALE |
1366                 OMAPFB_CAPS_WINDOW_OVERLAY |
1367                 OMAPFB_CAPS_WINDOW_ROTATE;
1368         if (blizzard.te_connected)
1369                 caps->ctrl |= OMAPFB_CAPS_TEARSYNC;
1370         caps->wnd_color |= (1 << OMAPFB_COLOR_RGB565) |
1371                            (1 << OMAPFB_COLOR_YUV420);
1372 }
1373
1374 static void _save_regs(const struct blizzard_reg_list *list, int cnt)
1375 {
1376         int i;
1377
1378         for (i = 0; i < cnt; i++, list++) {
1379                 int reg;
1380                 for (reg = list->start; reg <= list->end; reg += 2)
1381                         blizzard_reg_cache[reg / 2] = blizzard_read_reg(reg);
1382         }
1383 }
1384
1385 static void _restore_regs(const struct blizzard_reg_list *list, int cnt)
1386 {
1387         int i;
1388
1389         for (i = 0; i < cnt; i++, list++) {
1390                 int reg;
1391                 for (reg = list->start; reg <= list->end; reg += 2)
1392                         blizzard_write_reg(reg, blizzard_reg_cache[reg / 2]);
1393         }
1394 }
1395
1396 static void blizzard_save_all_regs(void)
1397 {
1398         _save_regs(blizzard_pll_regs, ARRAY_SIZE(blizzard_pll_regs));
1399         _save_regs(blizzard_gen_regs, ARRAY_SIZE(blizzard_gen_regs));
1400 }
1401
1402 static void blizzard_restore_pll_regs(void)
1403 {
1404         _restore_regs(blizzard_pll_regs, ARRAY_SIZE(blizzard_pll_regs));
1405 }
1406
1407 static void blizzard_restore_gen_regs(void)
1408 {
1409         _restore_regs(blizzard_gen_regs, ARRAY_SIZE(blizzard_gen_regs));
1410 }
1411
1412 static void blizzard_suspend(void)
1413 {
1414         u32 l;
1415         unsigned long tmo;
1416
1417         if (blizzard.last_color_mode) {
1418                 update_full_screen();
1419                 blizzard_sync();
1420         }
1421         blizzard.update_mode_before_suspend = blizzard.update_mode;
1422         /* the following will disable clocks as well */
1423         blizzard_set_update_mode(OMAPFB_UPDATE_DISABLED);
1424
1425         blizzard_save_all_regs();
1426
1427         blizzard_stop_sdram();
1428
1429         l = blizzard_read_reg(BLIZZARD_POWER_SAVE);
1430         /* Standby, Sleep. We assume we use an external clock. */
1431         l |= 0x03;
1432         blizzard_write_reg(BLIZZARD_POWER_SAVE, l);
1433
1434         tmo = jiffies + msecs_to_jiffies(100);
1435         while (!(blizzard_read_reg(BLIZZARD_PLL_MODE) & (1 << 1))) {
1436                 if (time_after(jiffies, tmo)) {
1437                         dev_err(blizzard.fbdev->dev,
1438                                 "s1d1374x: sleep timeout, stopping PLL manually\n");
1439                         l = blizzard_read_reg(BLIZZARD_PLL_MODE);
1440                         l &= ~0x03;
1441                         /* Disable PLL, counter function */
1442                         l |= 0x2;
1443                         blizzard_write_reg(BLIZZARD_PLL_MODE, l);
1444                         break;
1445                 }
1446                 msleep(1);
1447         }
1448
1449         if (blizzard.power_down != NULL)
1450                 blizzard.power_down(blizzard.fbdev->dev);
1451 }
1452
1453 static void blizzard_resume(void)
1454 {
1455         u32 l;
1456
1457         if (blizzard.power_up != NULL)
1458                 blizzard.power_up(blizzard.fbdev->dev);
1459
1460         l = blizzard_read_reg(BLIZZARD_POWER_SAVE);
1461         /* Standby, Sleep */
1462         l &= ~0x03;
1463         blizzard_write_reg(BLIZZARD_POWER_SAVE, l);
1464
1465         blizzard_restore_pll_regs();
1466         l = blizzard_read_reg(BLIZZARD_PLL_MODE);
1467         l &= ~0x03;
1468         /* Enable PLL, counter function */
1469         l |= 0x1;
1470         blizzard_write_reg(BLIZZARD_PLL_MODE, l);
1471
1472         while (!(blizzard_read_reg(BLIZZARD_PLL_DIV) & (1 << 7)))
1473                 msleep(1);
1474
1475         blizzard_restart_sdram();
1476
1477         blizzard_restore_gen_regs();
1478
1479         /* Enable display */
1480         blizzard_write_reg(BLIZZARD_DISPLAY_MODE, 0x01);
1481
1482         /* the following will enable clocks as necessary */
1483         blizzard_set_update_mode(blizzard.update_mode_before_suspend);
1484
1485         /* Force a background update */
1486         blizzard.zoom_on = 1;
1487         update_full_screen();
1488         blizzard_sync();
1489 }
1490
1491 static int blizzard_init(struct omapfb_device *fbdev, int ext_mode,
1492                          struct omapfb_mem_desc *req_vram)
1493 {
1494         int r = 0, i;
1495         u8 rev, conf;
1496         unsigned long ext_clk;
1497         int extif_div;
1498         unsigned long sys_clk, pix_clk;
1499         struct omapfb_platform_data *omapfb_conf;
1500         struct blizzard_platform_data *ctrl_conf;
1501
1502         blizzard.fbdev = fbdev;
1503
1504         BUG_ON(!fbdev->ext_if || !fbdev->int_ctrl);
1505
1506         blizzard.fbdev = fbdev;
1507         blizzard.extif = fbdev->ext_if;
1508         blizzard.int_ctrl = fbdev->int_ctrl;
1509
1510         omapfb_conf = fbdev->dev->platform_data;
1511         ctrl_conf = omapfb_conf->ctrl_platform_data;
1512         if (ctrl_conf == NULL || ctrl_conf->get_clock_rate == NULL) {
1513                 dev_err(fbdev->dev, "s1d1374x: missing platform data\n");
1514                 r = -ENOENT;
1515                 goto err1;
1516         }
1517
1518         blizzard.power_down = ctrl_conf->power_down;
1519         blizzard.power_up = ctrl_conf->power_up;
1520
1521         spin_lock_init(&blizzard.req_lock);
1522
1523         if ((r = blizzard.int_ctrl->init(fbdev, 1, req_vram)) < 0)
1524                 goto err1;
1525
1526         if ((r = blizzard.extif->init(fbdev)) < 0)
1527                 goto err2;
1528
1529         blizzard_ctrl.set_color_key = blizzard.int_ctrl->set_color_key;
1530         blizzard_ctrl.get_color_key = blizzard.int_ctrl->get_color_key;
1531         blizzard_ctrl.setup_mem = blizzard.int_ctrl->setup_mem;
1532         blizzard_ctrl.mmap = blizzard.int_ctrl->mmap;
1533
1534         ext_clk = ctrl_conf->get_clock_rate(fbdev->dev);
1535         if ((r = calc_extif_timings(ext_clk, &extif_div)) < 0)
1536                 goto err3;
1537
1538         set_extif_timings(&blizzard.reg_timings);
1539
1540         if (blizzard.power_up != NULL)
1541                 blizzard.power_up(fbdev->dev);
1542
1543         calc_blizzard_clk_rates(ext_clk, &sys_clk, &pix_clk);
1544
1545         if ((r = calc_extif_timings(sys_clk, &extif_div)) < 0)
1546                 goto err3;
1547         set_extif_timings(&blizzard.reg_timings);
1548
1549         if (!(blizzard_read_reg(BLIZZARD_PLL_DIV) & 0x80)) {
1550                 dev_err(fbdev->dev,
1551                         "controller not initialized by the bootloader\n");
1552                 r = -ENODEV;
1553                 goto err3;
1554         }
1555
1556         if (ctrl_conf->te_connected) {
1557                 if ((r = setup_tearsync(pix_clk, extif_div)) < 0)
1558                         goto err3;
1559                 blizzard.te_connected = 1;
1560         }
1561
1562         rev = blizzard_read_reg(BLIZZARD_REV_CODE);
1563         conf = blizzard_read_reg(BLIZZARD_CONFIG);
1564
1565         switch (rev & 0xfc) {
1566         case 0x9c:
1567                 blizzard.version = BLIZZARD_VERSION_S1D13744;
1568                 pr_info("omapfb: s1d13744 LCD controller rev %d "
1569                         "initialized (CNF pins %x)\n", rev & 0x03, conf & 0x07);
1570                 break;
1571         case 0xa4:
1572                 blizzard.version = BLIZZARD_VERSION_S1D13745;
1573                 pr_info("omapfb: s1d13745 LCD controller rev %d "
1574                         "initialized (CNF pins %x)\n", rev & 0x03, conf & 0x07);
1575                 break;
1576         default:
1577                 dev_err(fbdev->dev, "invalid s1d1374x revision %02x\n",
1578                         rev);
1579                 r = -ENODEV;
1580                 goto err3;
1581         }
1582
1583         blizzard.max_transmit_size = blizzard.extif->max_transmit_size;
1584
1585         blizzard.update_mode = OMAPFB_UPDATE_DISABLED;
1586
1587         blizzard.auto_update_window.x = 0;
1588         blizzard.auto_update_window.y = 0;
1589         blizzard.auto_update_window.width = fbdev->panel->x_res;
1590         blizzard.auto_update_window.height = fbdev->panel->y_res;
1591         blizzard.auto_update_window.out_x = 0;
1592         blizzard.auto_update_window.out_y = 0;
1593         blizzard.auto_update_window.out_width = fbdev->panel->x_res;
1594         blizzard.auto_update_window.out_height = fbdev->panel->y_res;
1595         blizzard.auto_update_window.format = 0;
1596
1597         blizzard.screen_width = fbdev->panel->x_res;
1598         blizzard.screen_height = fbdev->panel->y_res;
1599
1600         init_timer(&blizzard.auto_update_timer);
1601         blizzard.auto_update_timer.function = blizzard_update_window_auto;
1602         blizzard.auto_update_timer.data = 0;
1603
1604         INIT_LIST_HEAD(&blizzard.free_req_list);
1605         INIT_LIST_HEAD(&blizzard.pending_req_list);
1606         for (i = 0; i < ARRAY_SIZE(blizzard.req_pool); i++)
1607                 list_add(&blizzard.req_pool[i].entry, &blizzard.free_req_list);
1608         BUG_ON(i <= IRQ_REQ_POOL_SIZE);
1609         sema_init(&blizzard.req_sema, i - IRQ_REQ_POOL_SIZE);
1610
1611         return 0;
1612 err3:
1613         if (blizzard.power_down != NULL)
1614                 blizzard.power_down(fbdev->dev);
1615         blizzard.extif->cleanup();
1616 err2:
1617         blizzard.int_ctrl->cleanup();
1618 err1:
1619         return r;
1620 }
1621
1622 static void blizzard_cleanup(void)
1623 {
1624         blizzard_set_update_mode(OMAPFB_UPDATE_DISABLED);
1625         blizzard.extif->cleanup();
1626         blizzard.int_ctrl->cleanup();
1627         if (blizzard.power_down != NULL)
1628                 blizzard.power_down(blizzard.fbdev->dev);
1629 }
1630
1631 struct lcd_ctrl blizzard_ctrl = {
1632         .name                   = "blizzard",
1633         .init                   = blizzard_init,
1634         .cleanup                = blizzard_cleanup,
1635         .bind_client            = blizzard_bind_client,
1636         .get_caps               = blizzard_get_caps,
1637         .set_update_mode        = blizzard_set_update_mode,
1638         .get_update_mode        = blizzard_get_update_mode,
1639         .setup_plane            = blizzard_setup_plane,
1640         .set_scale              = blizzard_set_scale,
1641         .enable_plane           = blizzard_enable_plane,
1642         .set_rotate             = blizzard_set_rotate,
1643         .update_window          = blizzard_update_window_async,
1644         .sync                   = blizzard_sync,
1645         .suspend                = blizzard_suspend,
1646         .resume                 = blizzard_resume,
1647 };
1648