git.oblomov.eu Git - linux-2.6/blob - 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_HDISP                          0x2a
  48 #define BLIZZARD_HNDP                           0x2c
  49 #define BLIZZARD_VDISP0                         0x2e
  50 #define BLIZZARD_VDISP1                         0x30
  51 #define BLIZZARD_VNDP                           0x32
  52 #define BLIZZARD_HSW                            0x34
  53 #define BLIZZARD_VSW                            0x38
  54 #define BLIZZARD_DISPLAY_MODE                   0x68
  55 #define BLIZZARD_INPUT_WIN_X_START_0            0x6c
  56 #define BLIZZARD_DATA_SOURCE_SELECT             0x8e
  57 #define BLIZZARD_DISP_MEM_DATA_PORT             0x90
  58 #define BLIZZARD_DISP_MEM_READ_ADDR0            0x92
  59 #define BLIZZARD_POWER_SAVE                     0xE6
  60 #define BLIZZARD_NDISP_CTRL_STATUS              0xE8
  61
  62 /* Data source select */
  63 /* For S1D13745 */
  64 #define BLIZZARD_SRC_WRITE_LCD_BACKGROUND       0x00
  65 #define BLIZZARD_SRC_WRITE_LCD_DESTRUCTIVE      0x01
  66 #define BLIZZARD_SRC_WRITE_OVERLAY_ENABLE       0x04
  67 #define BLIZZARD_SRC_DISABLE_OVERLAY            0x05
  68 /* For S1D13744 */
  69 #define BLIZZARD_SRC_WRITE_LCD                  0x00
  70 #define BLIZZARD_SRC_BLT_LCD                    0x06
  71
  72 #define BLIZZARD_COLOR_RGB565                   0x01
  73 #define BLIZZARD_COLOR_YUV420                   0x09
  74
  75 #define BLIZZARD_VERSION_S1D13745               0x01    /* Hailstorm */
  76 #define BLIZZARD_VERSION_S1D13744               0x02    /* Blizzard */
  77
  78 #define BLIZZARD_AUTO_UPDATE_TIME               (HZ / 20)
  79
  80 /* Reserve 4 request slots for requests in irq context */
  81 #define REQ_POOL_SIZE                   24
  82 #define IRQ_REQ_POOL_SIZE               4
  83
  84 #define REQ_FROM_IRQ_POOL 0x01
  85
  86 #define REQ_COMPLETE    0
  87 #define REQ_PENDING     1
  88
  89 struct blizzard_reg_list {
  90         int     start;
  91         int     end;
  92 };
  93
  94 /* These need to be saved / restored separately from the rest. */
  95 static struct blizzard_reg_list blizzard_pll_regs[] = {
  96         {
  97                 .start  = 0x04,         /* Don't save PLL ctrl (0x0C) */
  98                 .end    = 0x0a,
  99         },
 100         {
 101                 .start  = 0x0e,         /* Clock configuration */
 102                 .end    = 0x0e,
 103         },
 104 };
 105
 106 static struct blizzard_reg_list blizzard_gen_regs[] = {
 107         {
 108                 .start  = 0x18,         /* SDRAM control */
 109                 .end    = 0x20,
 110         },
 111         {
 112                 .start  = 0x28,         /* LCD Panel configuration */
 113                 .end    = 0x5a,         /* HSSI interface, TV configuration */
 114         },
 115 };
 116
 117 static u8 blizzard_reg_cache[0x5a / 2];
 118
 119 struct update_param {
 120         int     plane;
 121         int     x, y, width, height;
 122         int     out_x, out_y;
 123         int     out_width, out_height;
 124         int     color_mode;
 125         int     bpp;
 126         int     flags;
 127 };
 128
 129 struct blizzard_request {
 130         struct list_head entry;
 131         unsigned int     flags;
 132
 133         int              (*handler)(struct blizzard_request *req);
 134         void             (*complete)(void *data);
 135         void             *complete_data;
 136
 137         union {
 138                 struct update_param     update;
 139                 struct completion       *sync;
 140         } par;
 141 };
 142
 143 struct plane_info {
 144         unsigned long offset;
 145         int pos_x, pos_y;
 146         int width, height;
 147         int out_width, out_height;
 148         int scr_width;
 149         int color_mode;
 150         int bpp;
 151 };
 152
 153 struct blizzard_struct {
 154         enum omapfb_update_mode update_mode;
 155         enum omapfb_update_mode update_mode_before_suspend;
 156
 157         struct timer_list       auto_update_timer;
 158         int                     stop_auto_update;
 159         struct omapfb_update_window     auto_update_window;
 160         int                     enabled_planes;
 161         int                     vid_nonstd_color;
 162         int                     vid_scaled;
 163         int                     last_color_mode;
 164         int                     zoom_on;
 165         int                     screen_width;
 166         int                     screen_height;
 167         unsigned                te_connected:1;
 168         unsigned                vsync_only:1;
 169
 170         struct plane_info       plane[OMAPFB_PLANE_NUM];
 171
 172         struct blizzard_request req_pool[REQ_POOL_SIZE];
 173         struct list_head        pending_req_list;
 174         struct list_head        free_req_list;
 175         struct semaphore        req_sema;
 176         spinlock_t              req_lock;
 177
 178         unsigned long           sys_ck_rate;
 179         struct extif_timings    reg_timings, lut_timings;
 180
 181         u32                     max_transmit_size;
 182         u32                     extif_clk_period;
 183         int                     extif_clk_div;
 184         unsigned long           pix_tx_time;
 185         unsigned long           line_upd_time;
 186
 187         struct omapfb_device    *fbdev;
 188         struct lcd_ctrl_extif   *extif;
 189         struct lcd_ctrl         *int_ctrl;
 190
 191         void                    (*power_up)(struct device *dev);
 192         void                    (*power_down)(struct device *dev);
 193
 194         int                     version;
 195 } blizzard;
 196
 197 struct lcd_ctrl blizzard_ctrl;
 198
 199 static u8 blizzard_read_reg(u8 reg)
 200 {
 201         u8 data;
 202
 203         blizzard.extif->set_bits_per_cycle(8);
 204         blizzard.extif->write_command(&reg, 1);
 205         blizzard.extif->read_data(&data, 1);
 206
 207         return data;
 208 }
 209
 210 static void blizzard_write_reg(u8 reg, u8 val)
 211 {
 212         blizzard.extif->set_bits_per_cycle(8);
 213         blizzard.extif->write_command(&reg, 1);
 214         blizzard.extif->write_data(&val, 1);
 215 }
 216
 217 static void blizzard_restart_sdram(void)
 218 {
 219         unsigned long tmo;
 220
 221         blizzard_write_reg(BLIZZARD_MEM_BANK0_ACTIVATE, 0);
 222         udelay(50);
 223         blizzard_write_reg(BLIZZARD_MEM_BANK0_ACTIVATE, 1);
 224         tmo = jiffies + msecs_to_jiffies(200);
 225         while (!(blizzard_read_reg(BLIZZARD_MEM_BANK0_STATUS) & 0x01)) {
 226                 if (time_after(jiffies, tmo)) {
 227                         dev_err(blizzard.fbdev->dev,
 228                                         "s1d1374x: SDRAM not ready\n");
 229                         break;
 230                 }
 231                 msleep(1);
 232         }
 233 }
 234
 235 static void blizzard_stop_sdram(void)
 236 {
 237         blizzard_write_reg(BLIZZARD_MEM_BANK0_ACTIVATE, 0);
 238 }
 239
 240 /* Wait until the last window was completely written into the controllers
 241  * SDRAM and we can start transferring the next window.
 242  */
 243 static void blizzard_wait_line_buffer(void)
 244 {
 245         unsigned long tmo = jiffies + msecs_to_jiffies(30);
 246
 247         while (blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS) & (1 << 7)) {
 248                 if (time_after(jiffies, tmo)) {
 249                         if (printk_ratelimit())
 250                                 dev_err(blizzard.fbdev->dev,
 251                                         "s1d1374x: line buffer not ready\n");
 252                         break;
 253                 }
 254         }
 255 }
 256
 257 /* Wait until the YYC color space converter is idle. */
 258 static void blizzard_wait_yyc(void)
 259 {
 260         unsigned long tmo = jiffies + msecs_to_jiffies(30);
 261
 262         while (blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS) & (1 << 4)) {
 263                 if (time_after(jiffies, tmo)) {
 264                         if (printk_ratelimit())
 265                                 dev_err(blizzard.fbdev->dev,
 266                                         "s1d1374x: YYC not ready\n");
 267                         break;
 268                 }
 269         }
 270 }
 271
 272 static void disable_overlay(void)
 273 {
 274         blizzard_write_reg(BLIZZARD_DATA_SOURCE_SELECT,
 275                                 BLIZZARD_SRC_DISABLE_OVERLAY);
 276 }
 277
 278 static void set_window_regs(int x_start, int y_start, int x_end, int y_end,
 279                             int x_out_start, int y_out_start,
 280                             int x_out_end, int y_out_end, int color_mode,
 281                             int zoom_off, int flags)
 282 {
 283         u8 tmp[18];
 284         u8 cmd;
 285
 286         x_end--;
 287         y_end--;
 288         tmp[0] = x_start;
 289         tmp[1] = x_start >> 8;
 290         tmp[2] = y_start;
 291         tmp[3] = y_start >> 8;
 292         tmp[4] = x_end;
 293         tmp[5] = x_end >> 8;
 294         tmp[6] = y_end;
 295         tmp[7] = y_end >> 8;
 296
 297         x_out_end--;
 298         y_out_end--;
 299         tmp[8]  = x_out_start;
 300         tmp[9]  = x_out_start >> 8;
 301         tmp[10] = y_out_start;
 302         tmp[11] = y_out_start >> 8;
 303         tmp[12] = x_out_end;
 304         tmp[13] = x_out_end >> 8;
 305         tmp[14] = y_out_end;
 306         tmp[15] = y_out_end >> 8;
 307
 308         tmp[16] = color_mode;
 309         if (zoom_off && blizzard.version == BLIZZARD_VERSION_S1D13745)
 310                 tmp[17] = BLIZZARD_SRC_WRITE_LCD_BACKGROUND;
 311         else if (flags & OMAPFB_FORMAT_FLAG_ENABLE_OVERLAY)
 312                 tmp[17] = BLIZZARD_SRC_WRITE_OVERLAY_ENABLE;
 313         else
 314                 tmp[17] = blizzard.version == BLIZZARD_VERSION_S1D13744 ?
 315                                 BLIZZARD_SRC_WRITE_LCD :
 316                                 BLIZZARD_SRC_WRITE_LCD_DESTRUCTIVE;
 317
 318         blizzard.extif->set_bits_per_cycle(8);
 319         cmd = BLIZZARD_INPUT_WIN_X_START_0;
 320         blizzard.extif->write_command(&cmd, 1);
 321         blizzard.extif->write_data(tmp, 18);
 322 }
 323
 324 static void enable_tearsync(int y, int width, int height, int screen_height,
 325                             int out_height, int force_vsync)
 326 {
 327         u8 b;
 328
 329         b = blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS);
 330         b |= 1 << 3;
 331         blizzard_write_reg(BLIZZARD_NDISP_CTRL_STATUS, b);
 332
 333         if (likely(blizzard.vsync_only || force_vsync)) {
 334                 blizzard.extif->enable_tearsync(1, 0);
 335                 return;
 336         }
 337
 338         if (width * blizzard.pix_tx_time < blizzard.line_upd_time) {
 339                 blizzard.extif->enable_tearsync(1, 0);
 340                 return;
 341         }
 342
 343         if ((width * blizzard.pix_tx_time / 1000) * height <
 344             (y + out_height) * (blizzard.line_upd_time / 1000)) {
 345                 blizzard.extif->enable_tearsync(1, 0);
 346                 return;
 347         }
 348
 349         blizzard.extif->enable_tearsync(1, y + 1);
 350 }
 351
 352 static void disable_tearsync(void)
 353 {
 354         u8 b;
 355
 356         blizzard.extif->enable_tearsync(0, 0);
 357         b = blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS);
 358         b &= ~(1 << 3);
 359         blizzard_write_reg(BLIZZARD_NDISP_CTRL_STATUS, b);
 360         b = blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS);
 361 }
 362
 363 static inline void set_extif_timings(const struct extif_timings *t);
 364
 365 static inline struct blizzard_request *alloc_req(void)
 366 {
 367         unsigned long flags;
 368         struct blizzard_request *req;
 369         int req_flags = 0;
 370
 371         if (!in_interrupt())
 372                 down(&blizzard.req_sema);
 373         else
 374                 req_flags = REQ_FROM_IRQ_POOL;
 375
 376         spin_lock_irqsave(&blizzard.req_lock, flags);
 377         BUG_ON(list_empty(&blizzard.free_req_list));
 378         req = list_entry(blizzard.free_req_list.next,
 379                          struct blizzard_request, entry);
 380         list_del(&req->entry);
 381         spin_unlock_irqrestore(&blizzard.req_lock, flags);
 382
 383         INIT_LIST_HEAD(&req->entry);
 384         req->flags = req_flags;
 385
 386         return req;
 387 }
 388
 389 static inline void free_req(struct blizzard_request *req)
 390 {
 391         unsigned long flags;
 392
 393         spin_lock_irqsave(&blizzard.req_lock, flags);
 394
 395         list_del(&req->entry);
 396         list_add(&req->entry, &blizzard.free_req_list);
 397         if (!(req->flags & REQ_FROM_IRQ_POOL))
 398                 up(&blizzard.req_sema);
 399
 400         spin_unlock_irqrestore(&blizzard.req_lock, flags);
 401 }
 402
 403 static void process_pending_requests(void)
 404 {
 405         unsigned long flags;
 406
 407         spin_lock_irqsave(&blizzard.req_lock, flags);
 408
 409         while (!list_empty(&blizzard.pending_req_list)) {
 410                 struct blizzard_request *req;
 411                 void (*complete)(void *);
 412                 void *complete_data;
 413
 414                 req = list_entry(blizzard.pending_req_list.next,
 415                                  struct blizzard_request, entry);
 416                 spin_unlock_irqrestore(&blizzard.req_lock, flags);
 417
 418                 if (req->handler(req) == REQ_PENDING)
 419                         return;
 420
 421                 complete = req->complete;
 422                 complete_data = req->complete_data;
 423                 free_req(req);
 424
 425                 if (complete)
 426                         complete(complete_data);
 427
 428                 spin_lock_irqsave(&blizzard.req_lock, flags);
 429         }
 430
 431         spin_unlock_irqrestore(&blizzard.req_lock, flags);
 432 }
 433
 434 static void submit_req_list(struct list_head *head)
 435 {
 436         unsigned long flags;
 437         int process = 1;
 438
 439         spin_lock_irqsave(&blizzard.req_lock, flags);
 440         if (likely(!list_empty(&blizzard.pending_req_list)))
 441                 process = 0;
 442         list_splice_init(head, blizzard.pending_req_list.prev);
 443         spin_unlock_irqrestore(&blizzard.req_lock, flags);
 444
 445         if (process)
 446                 process_pending_requests();
 447 }
 448
 449 static void request_complete(void *data)
 450 {
 451         struct blizzard_request *req = (struct blizzard_request *)data;
 452         void                    (*complete)(void *);
 453         void                    *complete_data;
 454
 455         complete = req->complete;
 456         complete_data = req->complete_data;
 457
 458         free_req(req);
 459
 460         if (complete)
 461                 complete(complete_data);
 462
 463         process_pending_requests();
 464 }
 465
 466
 467 static int do_full_screen_update(struct blizzard_request *req)
 468 {
 469         int i;
 470         int flags;
 471
 472         for (i = 0; i < 3; i++) {
 473                 struct plane_info *p = &blizzard.plane[i];
 474                 if (!(blizzard.enabled_planes & (1 << i))) {
 475                         blizzard.int_ctrl->enable_plane(i, 0);
 476                         continue;
 477                 }
 478                 dev_dbg(blizzard.fbdev->dev, "pw %d ph %d\n",
 479                         p->width, p->height);
 480                 blizzard.int_ctrl->setup_plane(i,
 481                                 OMAPFB_CHANNEL_OUT_LCD, p->offset,
 482                                 p->scr_width, p->pos_x, p->pos_y,
 483                                 p->width, p->height,
 484                                 p->color_mode);
 485                 blizzard.int_ctrl->enable_plane(i, 1);
 486         }
 487
 488         dev_dbg(blizzard.fbdev->dev, "sw %d sh %d\n",
 489                 blizzard.screen_width, blizzard.screen_height);
 490         blizzard_wait_line_buffer();
 491         flags = req->par.update.flags;
 492         if (flags & OMAPFB_FORMAT_FLAG_TEARSYNC)
 493                 enable_tearsync(0, blizzard.screen_width,
 494                                 blizzard.screen_height,
 495                                 blizzard.screen_height,
 496                                 blizzard.screen_height,
 497                                 flags & OMAPFB_FORMAT_FLAG_FORCE_VSYNC);
 498         else
 499                 disable_tearsync();
 500
 501         set_window_regs(0, 0, blizzard.screen_width, blizzard.screen_height,
 502                         0, 0, blizzard.screen_width, blizzard.screen_height,
 503                         BLIZZARD_COLOR_RGB565, blizzard.zoom_on, flags);
 504         blizzard.zoom_on = 0;
 505
 506         blizzard.extif->set_bits_per_cycle(16);
 507         /* set_window_regs has left the register index at the right
 508          * place, so no need to set it here.
 509          */
 510         blizzard.extif->transfer_area(blizzard.screen_width,
 511                                       blizzard.screen_height,
 512                                       request_complete, req);
 513         return REQ_PENDING;
 514 }
 515
 516 /* Setup all planes with an overlapping area with the update window. */
 517 static int do_partial_update(struct blizzard_request *req, int plane,
 518                              int x, int y, int w, int h,
 519                              int x_out, int y_out, int w_out, int h_out,
 520                              int wnd_color_mode, int bpp)
 521 {
 522         int i;
 523         int gx1, gy1, gx2, gy2;
 524         int gx1_out, gy1_out, gx2_out, gy2_out;
 525         int color_mode;
 526         int flags;
 527         int zoom_off;
 528
 529         /* Global coordinates, relative to pixel 0,0 of the LCD */
 530         gx1 = x + blizzard.plane[plane].pos_x;
 531         gy1 = y + blizzard.plane[plane].pos_y;
 532         gx2 = gx1 + w;
 533         gy2 = gy1 + h;
 534
 535         flags = req->par.update.flags;
 536         if (flags & OMAPFB_FORMAT_FLAG_DOUBLE) {
 537                 gx1_out = gx1;
 538                 gy1_out = gy1;
 539                 gx2_out = gx1 + w * 2;
 540                 gy2_out = gy1 + h * 2;
 541         } else {
 542                 gx1_out = x_out + blizzard.plane[plane].pos_x;
 543                 gy1_out = y_out + blizzard.plane[plane].pos_y;
 544                 gx2_out = gx1_out + w_out;
 545                 gy2_out = gy1_out + h_out;
 546         }
 547         zoom_off = blizzard.zoom_on && gx1 == 0 && gy1 == 0 &&
 548                 w == blizzard.screen_width && h == blizzard.screen_height;
 549         blizzard.zoom_on = (!zoom_off && blizzard.zoom_on) ||
 550                            (w < w_out || h < h_out);
 551
 552         for (i = 0; i < OMAPFB_PLANE_NUM; i++) {
 553                 struct plane_info *p = &blizzard.plane[i];
 554                 int px1, py1;
 555                 int px2, py2;
 556                 int pw, ph;
 557                 int pposx, pposy;
 558                 unsigned long offset;
 559
 560                 if (!(blizzard.enabled_planes & (1 << i))  ||
 561                     (wnd_color_mode && i != plane)) {
 562                         blizzard.int_ctrl->enable_plane(i, 0);
 563                         continue;
 564                 }
 565                 /* Plane coordinates */
 566                 if (i == plane) {
 567                         /* Plane in which we are doing the update.
 568                          * Local coordinates are the one in the update
 569                          * request.
 570                          */
 571                         px1 = x;
 572                         py1 = y;
 573                         px2 = x + w;
 574                         py2 = y + h;
 575                         pposx = 0;
 576                         pposy = 0;
 577                 } else {
 578                         /* Check if this plane has an overlapping part */
 579                         px1 = gx1 - p->pos_x;
 580                         py1 = gy1 - p->pos_y;
 581                         px2 = gx2 - p->pos_x;
 582                         py2 = gy2 - p->pos_y;
 583                         if (px1 >= p->width || py1 >= p->height ||
 584                             px2 <= 0 || py2 <= 0) {
 585                                 blizzard.int_ctrl->enable_plane(i, 0);
 586                                 continue;
 587                         }
 588                         /* Calculate the coordinates for the overlapping
 589                          * part in the plane's local coordinates.
 590                          */
 591                         pposx = -px1;
 592                         pposy = -py1;
 593                         if (px1 < 0)
 594                                 px1 = 0;
 595                         if (py1 < 0)
 596                                 py1 = 0;
 597                         if (px2 > p->width)
 598                                 px2 = p->width;
 599                         if (py2 > p->height)
 600                                 py2 = p->height;
 601                         if (pposx < 0)
 602                                 pposx = 0;
 603                         if (pposy < 0)
 604                                 pposy = 0;
 605                 }
 606                 pw = px2 - px1;
 607                 ph = py2 - py1;
 608                 offset = p->offset + (p->scr_width * py1 + px1) * p->bpp / 8;
 609                 if (wnd_color_mode)
 610                         /* Window embedded in the plane with a differing
 611                          * color mode / bpp. Calculate the number of DMA
 612                          * transfer elements in terms of the plane's bpp.
 613                          */
 614                         pw = (pw + 1) * bpp / p->bpp;
 615 #ifdef VERBOSE
 616                 dev_dbg(blizzard.fbdev->dev,
 617                         "plane %d offset %#08lx pposx %d pposy %d "
 618                         "px1 %d py1 %d pw %d ph %d\n",
 619                         i, offset, pposx, pposy, px1, py1, pw, ph);
 620 #endif
 621                 blizzard.int_ctrl->setup_plane(i,
 622                                 OMAPFB_CHANNEL_OUT_LCD, offset,
 623                                 p->scr_width,
 624                                 pposx, pposy, pw, ph,
 625                                 p->color_mode);
 626
 627                 blizzard.int_ctrl->enable_plane(i, 1);
 628         }
 629
 630         switch (wnd_color_mode) {
 631         case OMAPFB_COLOR_YUV420:
 632                 color_mode = BLIZZARD_COLOR_YUV420;
 633                 /* Currently only the 16 bits/pixel cycle format is
 634                  * supported on the external interface. Adjust the number
 635                  * of transfer elements per line for 12bpp format.
 636                  */
 637                 w = (w + 1) * 3 / 4;
 638                 break;
 639         default:
 640                 color_mode = BLIZZARD_COLOR_RGB565;
 641                 break;
 642         }
 643
 644         blizzard_wait_line_buffer();
 645         if (blizzard.last_color_mode == BLIZZARD_COLOR_YUV420)
 646                 blizzard_wait_yyc();
 647         blizzard.last_color_mode = color_mode;
 648         if (flags & OMAPFB_FORMAT_FLAG_TEARSYNC)
 649                 enable_tearsync(gy1, w, h,
 650                                 blizzard.screen_height,
 651                                 h_out,
 652                                 flags & OMAPFB_FORMAT_FLAG_FORCE_VSYNC);
 653         else
 654                 disable_tearsync();
 655
 656         set_window_regs(gx1, gy1, gx2, gy2, gx1_out, gy1_out, gx2_out, gy2_out,
 657                         color_mode, zoom_off, flags);
 658
 659         blizzard.extif->set_bits_per_cycle(16);
 660         /* set_window_regs has left the register index at the right
 661          * place, so no need to set it here.
 662          */
 663         blizzard.extif->transfer_area(w, h, request_complete, req);
 664
 665         return REQ_PENDING;
 666 }
 667
 668 static int send_frame_handler(struct blizzard_request *req)
 669 {
 670         struct update_param *par = &req->par.update;
 671         int plane = par->plane;
 672
 673 #ifdef VERBOSE
 674         dev_dbg(blizzard.fbdev->dev,
 675                 "send_frame: x %d y %d w %d h %d "
 676                 "x_out %d y_out %d w_out %d h_out %d "
 677                 "color_mode %04x flags %04x planes %01x\n",
 678                 par->x, par->y, par->width, par->height,
 679                 par->out_x, par->out_y, par->out_width, par->out_height,
 680                 par->color_mode, par->flags, blizzard.enabled_planes);
 681 #endif
 682         if (par->flags & OMAPFB_FORMAT_FLAG_DISABLE_OVERLAY)
 683                 disable_overlay();
 684
 685         if ((blizzard.enabled_planes & blizzard.vid_nonstd_color) ||
 686              (blizzard.enabled_planes & blizzard.vid_scaled))
 687                 return do_full_screen_update(req);
 688
 689         return do_partial_update(req, plane, par->x, par->y,
 690                                  par->width, par->height,
 691                                  par->out_x, par->out_y,
 692                                  par->out_width, par->out_height,
 693                                  par->color_mode, par->bpp);
 694 }
 695
 696 static void send_frame_complete(void *data)
 697 {
 698 }
 699
 700 #define ADD_PREQ(_x, _y, _w, _h, _x_out, _y_out, _w_out, _h_out) do {   \
 701         req = alloc_req();                      \
 702         req->handler    = send_frame_handler;   \
 703         req->complete   = send_frame_complete;  \
 704         req->par.update.plane = plane_idx;      \
 705         req->par.update.x = _x;                 \
 706         req->par.update.y = _y;                 \
 707         req->par.update.width  = _w;            \
 708         req->par.update.height = _h;            \
 709         req->par.update.out_x = _x_out;         \
 710         req->par.update.out_y = _y_out;         \
 711         req->par.update.out_width = _w_out;     \
 712         req->par.update.out_height = _h_out;    \
 713         req->par.update.bpp = bpp;              \
 714         req->par.update.color_mode = color_mode;\
 715         req->par.update.flags     = flags;      \
 716         list_add_tail(&req->entry, req_head);   \
 717 } while(0)
 718
 719 static void create_req_list(int plane_idx,
 720                             struct omapfb_update_window *win,
 721                             struct list_head *req_head)
 722 {
 723         struct blizzard_request *req;
 724         int x = win->x;
 725         int y = win->y;
 726         int width = win->width;
 727         int height = win->height;
 728         int x_out = win->out_x;
 729         int y_out = win->out_y;
 730         int width_out = win->out_width;
 731         int height_out = win->out_height;
 732         int color_mode;
 733         int bpp;
 734         int flags;
 735         unsigned int ystart = y;
 736         unsigned int yspan = height;
 737         unsigned int ystart_out = y_out;
 738         unsigned int yspan_out = height_out;
 739
 740         flags = win->format & ~OMAPFB_FORMAT_MASK;
 741         color_mode = win->format & OMAPFB_FORMAT_MASK;
 742         switch (color_mode) {
 743         case OMAPFB_COLOR_YUV420:
 744                 /* Embedded window with different color mode */
 745                 bpp = 12;
 746                 /* X, Y, height must be aligned at 2, width at 4 pixels */
 747                 x &= ~1;
 748                 y &= ~1;
 749                 height = yspan = height & ~1;
 750                 width = width & ~3;
 751                 break;
 752         default:
 753                 /* Same as the plane color mode */
 754                 bpp = blizzard.plane[plane_idx].bpp;
 755                 break;
 756         }
 757         if (width * height * bpp / 8 > blizzard.max_transmit_size) {
 758                 yspan = blizzard.max_transmit_size / (width * bpp / 8);
 759                 yspan_out = yspan * height_out / height;
 760                 ADD_PREQ(x, ystart, width, yspan, x_out, ystart_out,
 761                          width_out, yspan_out);
 762                 ystart += yspan;
 763                 ystart_out += yspan_out;
 764                 yspan = height - yspan;
 765                 yspan_out = height_out - yspan_out;
 766                 flags &= ~OMAPFB_FORMAT_FLAG_TEARSYNC;
 767         }
 768
 769         ADD_PREQ(x, ystart, width, yspan, x_out, ystart_out,
 770                  width_out, yspan_out);
 771 }
 772
 773 static void auto_update_complete(void *data)
 774 {
 775         if (!blizzard.stop_auto_update)
 776                 mod_timer(&blizzard.auto_update_timer,
 777                           jiffies + BLIZZARD_AUTO_UPDATE_TIME);
 778 }
 779
 780 static void blizzard_update_window_auto(unsigned long arg)
 781 {
 782         LIST_HEAD(req_list);
 783         struct blizzard_request *last;
 784         struct omapfb_plane_struct *plane;
 785
 786         plane = blizzard.fbdev->fb_info[0]->par;
 787         create_req_list(plane->idx,
 788                         &blizzard.auto_update_window, &req_list);
 789         last = list_entry(req_list.prev, struct blizzard_request, entry);
 790
 791         last->complete = auto_update_complete;
 792         last->complete_data = NULL;
 793
 794         submit_req_list(&req_list);
 795 }
 796
 797 int blizzard_update_window_async(struct fb_info *fbi,
 798                                  struct omapfb_update_window *win,
 799                                  void (*complete_callback)(void *arg),
 800                                  void *complete_callback_data)
 801 {
 802         LIST_HEAD(req_list);
 803         struct blizzard_request *last;
 804         struct omapfb_plane_struct *plane = fbi->par;
 805
 806         if (unlikely(blizzard.update_mode != OMAPFB_MANUAL_UPDATE))
 807                 return -EINVAL;
 808         if (unlikely(!blizzard.te_connected &&
 809                      (win->format & OMAPFB_FORMAT_FLAG_TEARSYNC)))
 810                 return -EINVAL;
 811
 812         create_req_list(plane->idx, win, &req_list);
 813         last = list_entry(req_list.prev, struct blizzard_request, entry);
 814
 815         last->complete = complete_callback;
 816         last->complete_data = (void *)complete_callback_data;
 817
 818         submit_req_list(&req_list);
 819
 820         return 0;
 821 }
 822 EXPORT_SYMBOL(blizzard_update_window_async);
 823
 824 static int update_full_screen(void)
 825 {
 826         return blizzard_update_window_async(blizzard.fbdev->fb_info[0],
 827                                      &blizzard.auto_update_window, NULL, NULL);
 828
 829 }
 830
 831 static int blizzard_setup_plane(int plane, int channel_out,
 832                                   unsigned long offset, int screen_width,
 833                                   int pos_x, int pos_y, int width, int height,
 834                                   int color_mode)
 835 {
 836         struct plane_info *p;
 837
 838 #ifdef VERBOSE
 839         dev_dbg(blizzard.fbdev->dev,
 840                     "plane %d ch_out %d offset %#08lx scr_width %d "
 841                     "pos_x %d pos_y %d width %d height %d color_mode %d\n",
 842                     plane, channel_out, offset, screen_width,
 843                     pos_x, pos_y, width, height, color_mode);
 844 #endif
 845         if ((unsigned)plane > OMAPFB_PLANE_NUM)
 846                 return -EINVAL;
 847         p = &blizzard.plane[plane];
 848
 849         switch (color_mode) {
 850         case OMAPFB_COLOR_YUV422:
 851         case OMAPFB_COLOR_YUY422:
 852                 p->bpp = 16;
 853                 blizzard.vid_nonstd_color &= ~(1 << plane);
 854                 break;
 855         case OMAPFB_COLOR_YUV420:
 856                 p->bpp = 12;
 857                 blizzard.vid_nonstd_color |= 1 << plane;
 858                 break;
 859         case OMAPFB_COLOR_RGB565:
 860                 p->bpp = 16;
 861                 blizzard.vid_nonstd_color &= ~(1 << plane);
 862                 break;
 863         default:
 864                 return -EINVAL;
 865         }
 866
 867         p->offset = offset;
 868         p->pos_x = pos_x;
 869         p->pos_y = pos_y;
 870         p->width = width;
 871         p->height = height;
 872         p->scr_width = screen_width;
 873         if (!p->out_width)
 874                 p->out_width = width;
 875         if (!p->out_height)
 876                 p->out_height = height;
 877
 878         p->color_mode = color_mode;
 879
 880         return 0;
 881 }
 882
 883 static int blizzard_set_scale(int plane, int orig_w, int orig_h,
 884                               int out_w, int out_h)
 885 {
 886         struct plane_info *p = &blizzard.plane[plane];
 887         int r;
 888
 889         dev_dbg(blizzard.fbdev->dev,
 890                 "plane %d orig_w %d orig_h %d out_w %d out_h %d\n",
 891                 plane, orig_w, orig_h, out_w, out_h);
 892         if ((unsigned)plane > OMAPFB_PLANE_NUM)
 893                 return -ENODEV;
 894
 895         r = blizzard.int_ctrl->set_scale(plane, orig_w, orig_h, out_w, out_h);
 896         if (r < 0)
 897                 return r;
 898
 899         p->width = orig_w;
 900         p->height = orig_h;
 901         p->out_width = out_w;
 902         p->out_height = out_h;
 903         if (orig_w == out_w && orig_h == out_h)
 904                 blizzard.vid_scaled &= ~(1 << plane);
 905         else
 906                 blizzard.vid_scaled |= 1 << plane;
 907
 908         return 0;
 909 }
 910
 911 static int blizzard_enable_plane(int plane, int enable)
 912 {
 913         if (enable)
 914                 blizzard.enabled_planes |= 1 << plane;
 915         else
 916                 blizzard.enabled_planes &= ~(1 << plane);
 917
 918         return 0;
 919 }
 920
 921 static int sync_handler(struct blizzard_request *req)
 922 {
 923         complete(req->par.sync);
 924         return REQ_COMPLETE;
 925 }
 926
 927 static void blizzard_sync(void)
 928 {
 929         LIST_HEAD(req_list);
 930         struct blizzard_request *req;
 931         struct completion comp;
 932
 933         req = alloc_req();
 934
 935         req->handler = sync_handler;
 936         req->complete = NULL;
 937         init_completion(&comp);
 938         req->par.sync = &comp;
 939
 940         list_add(&req->entry, &req_list);
 941         submit_req_list(&req_list);
 942
 943         wait_for_completion(&comp);
 944 }
 945
 946
 947 static void blizzard_bind_client(struct omapfb_notifier_block *nb)
 948 {
 949         if (blizzard.update_mode == OMAPFB_MANUAL_UPDATE) {
 950                 omapfb_notify_clients(blizzard.fbdev, OMAPFB_EVENT_READY);
 951         }
 952 }
 953
 954 static int blizzard_set_update_mode(enum omapfb_update_mode mode)
 955 {
 956         if (unlikely(mode != OMAPFB_MANUAL_UPDATE &&
 957                      mode != OMAPFB_AUTO_UPDATE &&
 958                      mode != OMAPFB_UPDATE_DISABLED))
 959                 return -EINVAL;
 960
 961         if (mode == blizzard.update_mode)
 962                 return 0;
 963
 964         dev_info(blizzard.fbdev->dev, "s1d1374x: setting update mode to %s\n",
 965                         mode == OMAPFB_UPDATE_DISABLED ? "disabled" :
 966                         (mode == OMAPFB_AUTO_UPDATE ? "auto" : "manual"));
 967
 968         switch (blizzard.update_mode) {
 969         case OMAPFB_MANUAL_UPDATE:
 970                 omapfb_notify_clients(blizzard.fbdev, OMAPFB_EVENT_DISABLED);
 971                 break;
 972         case OMAPFB_AUTO_UPDATE:
 973                 blizzard.stop_auto_update = 1;
 974                 del_timer_sync(&blizzard.auto_update_timer);
 975                 break;
 976         case OMAPFB_UPDATE_DISABLED:
 977                 break;
 978         }
 979
 980         blizzard.update_mode = mode;
 981         blizzard_sync();
 982         blizzard.stop_auto_update = 0;
 983
 984         switch (mode) {
 985         case OMAPFB_MANUAL_UPDATE:
 986                 omapfb_notify_clients(blizzard.fbdev, OMAPFB_EVENT_READY);
 987                 break;
 988         case OMAPFB_AUTO_UPDATE:
 989                 blizzard_update_window_auto(0);
 990                 break;
 991         case OMAPFB_UPDATE_DISABLED:
 992                 break;
 993         }
 994
 995         return 0;
 996 }
 997
 998 static enum omapfb_update_mode blizzard_get_update_mode(void)
 999 {
1000         return blizzard.update_mode;
1001 }
1002
1003 static inline void set_extif_timings(const struct extif_timings *t)
1004 {
1005         blizzard.extif->set_timings(t);
1006 }
1007
1008 static inline unsigned long round_to_extif_ticks(unsigned long ps, int div)
1009 {
1010         int bus_tick = blizzard.extif_clk_period * div;
1011         return (ps + bus_tick - 1) / bus_tick * bus_tick;
1012 }
1013
1014 static int calc_reg_timing(unsigned long sysclk, int div)
1015 {
1016         struct extif_timings *t;
1017         unsigned long systim;
1018
1019         /* CSOnTime 0, WEOnTime 2 ns, REOnTime 2 ns,
1020          * AccessTime 2 ns + 12.2 ns (regs),
1021          * WEOffTime = WEOnTime + 1 ns,
1022          * REOffTime = REOnTime + 12 ns (regs),
1023          * CSOffTime = REOffTime + 1 ns
1024          * ReadCycle = 2ns + 2*SYSCLK  (regs),
1025          * WriteCycle = 2*SYSCLK + 2 ns,
1026          * CSPulseWidth = 10 ns */
1027
1028         systim = 1000000000 / (sysclk / 1000);
1029         dev_dbg(blizzard.fbdev->dev,
1030                   "Blizzard systim %lu ps extif_clk_period %u div %d\n",
1031                   systim, blizzard.extif_clk_period, div);
1032
1033         t = &blizzard.reg_timings;
1034         memset(t, 0, sizeof(*t));
1035
1036         t->clk_div = div;
1037
1038         t->cs_on_time = 0;
1039         t->we_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div);
1040         t->re_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div);
1041         t->access_time = round_to_extif_ticks(t->re_on_time + 12200, div);
1042         t->we_off_time = round_to_extif_ticks(t->we_on_time + 1000, div);
1043         t->re_off_time = round_to_extif_ticks(t->re_on_time + 13000, div);
1044         t->cs_off_time = round_to_extif_ticks(t->re_off_time + 1000, div);
1045         t->we_cycle_time = round_to_extif_ticks(2 * systim + 2000, div);
1046         if (t->we_cycle_time < t->we_off_time)
1047                 t->we_cycle_time = t->we_off_time;
1048         t->re_cycle_time = round_to_extif_ticks(2 * systim + 2000, div);
1049         if (t->re_cycle_time < t->re_off_time)
1050                 t->re_cycle_time = t->re_off_time;
1051         t->cs_pulse_width = 0;
1052
1053         dev_dbg(blizzard.fbdev->dev, "[reg]cson %d csoff %d reon %d reoff %d\n",
1054                  t->cs_on_time, t->cs_off_time, t->re_on_time, t->re_off_time);
1055         dev_dbg(blizzard.fbdev->dev, "[reg]weon %d weoff %d recyc %d wecyc %d\n",
1056                  t->we_on_time, t->we_off_time, t->re_cycle_time,
1057                  t->we_cycle_time);
1058         dev_dbg(blizzard.fbdev->dev, "[reg]rdaccess %d cspulse %d\n",
1059                  t->access_time, t->cs_pulse_width);
1060
1061         return blizzard.extif->convert_timings(t);
1062 }
1063
1064 static int calc_lut_timing(unsigned long sysclk, int div)
1065 {
1066         struct extif_timings *t;
1067         unsigned long systim;
1068
1069         /* CSOnTime 0, WEOnTime 2 ns, REOnTime 2 ns,
1070          * AccessTime 2 ns + 4 * SYSCLK + 26 (lut),
1071          * WEOffTime = WEOnTime + 1 ns,
1072          * REOffTime = REOnTime + 4*SYSCLK + 26 ns (lut),
1073          * CSOffTime = REOffTime + 1 ns
1074          * ReadCycle = 2ns + 4*SYSCLK + 26 ns (lut),
1075          * WriteCycle = 2*SYSCLK + 2 ns,
1076          * CSPulseWidth = 10 ns */
1077
1078         systim = 1000000000 / (sysclk / 1000);
1079         dev_dbg(blizzard.fbdev->dev,
1080                 "Blizzard systim %lu ps extif_clk_period %u div %d\n",
1081                 systim, blizzard.extif_clk_period, div);
1082
1083         t = &blizzard.lut_timings;
1084         memset(t, 0, sizeof(*t));
1085
1086         t->clk_div = div;
1087
1088         t->cs_on_time = 0;
1089         t->we_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div);
1090         t->re_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div);
1091         t->access_time = round_to_extif_ticks(t->re_on_time + 4 * systim +
1092                                               26000, div);
1093         t->we_off_time = round_to_extif_ticks(t->we_on_time + 1000, div);
1094         t->re_off_time = round_to_extif_ticks(t->re_on_time + 4 * systim +
1095                                               26000, div);
1096         t->cs_off_time = round_to_extif_ticks(t->re_off_time + 1000, div);
1097         t->we_cycle_time = round_to_extif_ticks(2 * systim + 2000, div);
1098         if (t->we_cycle_time < t->we_off_time)
1099                 t->we_cycle_time = t->we_off_time;
1100         t->re_cycle_time = round_to_extif_ticks(2000 + 4 * systim + 26000, div);
1101         if (t->re_cycle_time < t->re_off_time)
1102                 t->re_cycle_time = t->re_off_time;
1103         t->cs_pulse_width = 0;
1104
1105         dev_dbg(blizzard.fbdev->dev,
1106                  "[lut]cson %d csoff %d reon %d reoff %d\n",
1107                  t->cs_on_time, t->cs_off_time, t->re_on_time, t->re_off_time);
1108         dev_dbg(blizzard.fbdev->dev,
1109                  "[lut]weon %d weoff %d recyc %d wecyc %d\n",
1110                  t->we_on_time, t->we_off_time, t->re_cycle_time,
1111                  t->we_cycle_time);
1112         dev_dbg(blizzard.fbdev->dev, "[lut]rdaccess %d cspulse %d\n",
1113                  t->access_time, t->cs_pulse_width);
1114
1115         return blizzard.extif->convert_timings(t);
1116 }
1117
1118 static int calc_extif_timings(unsigned long sysclk, int *extif_mem_div)
1119 {
1120         int max_clk_div;
1121         int div;
1122
1123         blizzard.extif->get_clk_info(&blizzard.extif_clk_period, &max_clk_div);
1124         for (div = 1; div <= max_clk_div; div++) {
1125                 if (calc_reg_timing(sysclk, div) == 0)
1126                         break;
1127         }
1128         if (div > max_clk_div) {
1129                 dev_dbg(blizzard.fbdev->dev, "reg timing failed\n");
1130                 goto err;
1131         }
1132         *extif_mem_div = div;
1133
1134         for (div = 1; div <= max_clk_div; div++) {
1135                 if (calc_lut_timing(sysclk, div) == 0)
1136                         break;
1137         }
1138
1139         if (div > max_clk_div)
1140                 goto err;
1141
1142         blizzard.extif_clk_div = div;
1143
1144         return 0;
1145 err:
1146         dev_err(blizzard.fbdev->dev, "can't setup timings\n");
1147         return -1;
1148 }
1149
1150 static void calc_blizzard_clk_rates(unsigned long ext_clk,
1151                                 unsigned long *sys_clk, unsigned long *pix_clk)
1152 {
1153         int pix_clk_src;
1154         int sys_div = 0, sys_mul = 0;
1155         int pix_div;
1156
1157         pix_clk_src = blizzard_read_reg(BLIZZARD_CLK_SRC);
1158         pix_div = ((pix_clk_src >> 3) & 0x1f) + 1;
1159         if ((pix_clk_src & (0x3 << 1)) == 0) {
1160                 /* Source is the PLL */
1161                 sys_div = (blizzard_read_reg(BLIZZARD_PLL_DIV) & 0x3f) + 1;
1162                 sys_mul = blizzard_read_reg(BLIZZARD_PLL_CLOCK_SYNTH_0);
1163                 sys_mul |= ((blizzard_read_reg(BLIZZARD_PLL_CLOCK_SYNTH_1)
1164                                 & 0x0f) << 11);
1165                 *sys_clk = ext_clk * sys_mul / sys_div;
1166         } else  /* else source is ext clk, or oscillator */
1167                 *sys_clk = ext_clk;
1168
1169         *pix_clk = *sys_clk / pix_div;                  /* HZ */
1170         dev_dbg(blizzard.fbdev->dev,
1171                 "ext_clk %ld pix_src %d pix_div %d sys_div %d sys_mul %d\n",
1172                 ext_clk, pix_clk_src & (0x3 << 1), pix_div, sys_div, sys_mul);
1173         dev_dbg(blizzard.fbdev->dev, "sys_clk %ld pix_clk %ld\n",
1174                 *sys_clk, *pix_clk);
1175 }
1176
1177 static int setup_tearsync(unsigned long pix_clk, int extif_div)
1178 {
1179         int hdisp, vdisp;
1180         int hndp, vndp;
1181         int hsw, vsw;
1182         int hs, vs;
1183         int hs_pol_inv, vs_pol_inv;
1184         int use_hsvs, use_ndp;
1185         u8  b;
1186
1187         hsw = blizzard_read_reg(BLIZZARD_HSW);
1188         vsw = blizzard_read_reg(BLIZZARD_VSW);
1189         hs_pol_inv = !(hsw & 0x80);
1190         vs_pol_inv = !(vsw & 0x80);
1191         hsw = hsw & 0x7f;
1192         vsw = vsw & 0x3f;
1193
1194         hdisp = blizzard_read_reg(BLIZZARD_HDISP) * 8;
1195         vdisp = blizzard_read_reg(BLIZZARD_VDISP0) +
1196                 ((blizzard_read_reg(BLIZZARD_VDISP1) & 0x3) << 8);
1197
1198         hndp = blizzard_read_reg(BLIZZARD_HNDP) & 0x3f;
1199         vndp = blizzard_read_reg(BLIZZARD_VNDP);
1200
1201         /* time to transfer one pixel (16bpp) in ps */
1202         blizzard.pix_tx_time = blizzard.reg_timings.we_cycle_time;
1203         if (blizzard.extif->get_max_tx_rate != NULL) {
1204                 /* The external interface might have a rate limitation,
1205                  * if so, we have to maximize our transfer rate.
1206                  */
1207                 unsigned long min_tx_time;
1208                 unsigned long max_tx_rate = blizzard.extif->get_max_tx_rate();
1209
1210                 dev_dbg(blizzard.fbdev->dev, "max_tx_rate %ld HZ\n",
1211                         max_tx_rate);
1212                 min_tx_time = 1000000000 / (max_tx_rate / 1000);  /* ps */
1213                 if (blizzard.pix_tx_time < min_tx_time)
1214                         blizzard.pix_tx_time = min_tx_time;
1215         }
1216
1217         /* time to update one line in ps */
1218         blizzard.line_upd_time = (hdisp + hndp) * 1000000 / (pix_clk / 1000);
1219         blizzard.line_upd_time *= 1000;
1220         if (hdisp * blizzard.pix_tx_time > blizzard.line_upd_time)
1221                 /* transfer speed too low, we might have to use both
1222                  * HS and VS */
1223                 use_hsvs = 1;
1224         else
1225                 /* decent transfer speed, we'll always use only VS */
1226                 use_hsvs = 0;
1227
1228         if (use_hsvs && (hs_pol_inv || vs_pol_inv)) {
1229                 /* HS or'ed with VS doesn't work, use the active high
1230                  * TE signal based on HNDP / VNDP */
1231                 use_ndp = 1;
1232                 hs_pol_inv = 0;
1233                 vs_pol_inv = 0;
1234                 hs = hndp;
1235                 vs = vndp;
1236         } else {
1237                 /* Use HS or'ed with VS as a TE signal if both are needed
1238                  * or VNDP if only vsync is needed. */
1239                 use_ndp = 0;
1240                 hs = hsw;
1241                 vs = vsw;
1242                 if (!use_hsvs) {
1243                         hs_pol_inv = 0;
1244                         vs_pol_inv = 0;
1245                 }
1246         }
1247
1248         hs = hs * 1000000 / (pix_clk / 1000);             /* ps */
1249         hs *= 1000;
1250
1251         vs = vs * (hdisp + hndp) * 1000000 / (pix_clk / 1000); /* ps */
1252         vs *= 1000;
1253
1254         if (vs <= hs)
1255                 return -EDOM;
1256         /* set VS to 120% of HS to minimize VS detection time */
1257         vs = hs * 12 / 10;
1258         /* minimize HS too */
1259         if (hs > 10000)
1260                 hs = 10000;
1261
1262         b = blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS);
1263         b &= ~0x3;
1264         b |= use_hsvs ? 1 : 0;
1265         b |= (use_ndp && use_hsvs) ? 0 : 2;
1266         blizzard_write_reg(BLIZZARD_NDISP_CTRL_STATUS, b);
1267
1268         blizzard.vsync_only = !use_hsvs;
1269
1270         dev_dbg(blizzard.fbdev->dev,
1271                 "pix_clk %ld HZ pix_tx_time %ld ps line_upd_time %ld ps\n",
1272                 pix_clk, blizzard.pix_tx_time, blizzard.line_upd_time);
1273         dev_dbg(blizzard.fbdev->dev,
1274                 "hs %d ps vs %d ps mode %d vsync_only %d\n",
1275                 hs, vs, b & 0x3, !use_hsvs);
1276
1277         return blizzard.extif->setup_tearsync(1, hs, vs,
1278                                               hs_pol_inv, vs_pol_inv,
1279                                               extif_div);
1280 }
1281
1282 static void blizzard_get_caps(int plane, struct omapfb_caps *caps)
1283 {
1284         blizzard.int_ctrl->get_caps(plane, caps);
1285         caps->ctrl |= OMAPFB_CAPS_MANUAL_UPDATE |
1286                 OMAPFB_CAPS_WINDOW_PIXEL_DOUBLE |
1287                 OMAPFB_CAPS_WINDOW_SCALE |
1288                 OMAPFB_CAPS_WINDOW_OVERLAY;
1289         if (blizzard.te_connected)
1290                 caps->ctrl |= OMAPFB_CAPS_TEARSYNC;
1291         caps->wnd_color |= (1 << OMAPFB_COLOR_RGB565) |
1292                            (1 << OMAPFB_COLOR_YUV420);
1293 }
1294
1295 static void _save_regs(struct blizzard_reg_list *list, int cnt)
1296 {
1297         int i;
1298
1299         for (i = 0; i < cnt; i++, list++) {
1300                 int reg;
1301                 for (reg = list->start; reg <= list->end; reg += 2)
1302                         blizzard_reg_cache[reg / 2] = blizzard_read_reg(reg);
1303         }
1304 }
1305
1306 static void _restore_regs(struct blizzard_reg_list *list, int cnt)
1307 {
1308         int i;
1309
1310         for (i = 0; i < cnt; i++, list++) {
1311                 int reg;
1312                 for (reg = list->start; reg <= list->end; reg += 2)
1313                         blizzard_write_reg(reg, blizzard_reg_cache[reg / 2]);
1314         }
1315 }
1316
1317 static void blizzard_save_all_regs(void)
1318 {
1319         _save_regs(blizzard_pll_regs, ARRAY_SIZE(blizzard_pll_regs));
1320         _save_regs(blizzard_gen_regs, ARRAY_SIZE(blizzard_gen_regs));
1321 }
1322
1323 static void blizzard_restore_pll_regs(void)
1324 {
1325         _restore_regs(blizzard_pll_regs, ARRAY_SIZE(blizzard_pll_regs));
1326 }
1327
1328 static void blizzard_restore_gen_regs(void)
1329 {
1330         _restore_regs(blizzard_gen_regs, ARRAY_SIZE(blizzard_gen_regs));
1331 }
1332
1333 static void blizzard_suspend(void)
1334 {
1335         u32 l;
1336         unsigned long tmo;
1337
1338         if (blizzard.last_color_mode) {
1339                 update_full_screen();
1340                 blizzard_sync();
1341         }
1342         blizzard.update_mode_before_suspend = blizzard.update_mode;
1343         /* the following will disable clocks as well */
1344         blizzard_set_update_mode(OMAPFB_UPDATE_DISABLED);
1345
1346         blizzard_save_all_regs();
1347
1348         blizzard_stop_sdram();
1349
1350         l = blizzard_read_reg(BLIZZARD_POWER_SAVE);
1351         /* Standby, Sleep. We assume we use an external clock. */
1352         l |= 0x03;
1353         blizzard_write_reg(BLIZZARD_POWER_SAVE, l);
1354
1355         tmo = jiffies + msecs_to_jiffies(100);
1356         while (!(blizzard_read_reg(BLIZZARD_PLL_MODE) & (1 << 1))) {
1357                 if (time_after(jiffies, tmo)) {
1358                         dev_err(blizzard.fbdev->dev,
1359                                 "s1d1374x: sleep timeout, stopping PLL manually\n");
1360                         l = blizzard_read_reg(BLIZZARD_PLL_MODE);
1361                         l &= ~0x03;
1362                         /* Disable PLL, counter function */
1363                         l |= 0x2;
1364                         blizzard_write_reg(BLIZZARD_PLL_MODE, l);
1365                         break;
1366                 }
1367                 msleep(1);
1368         }
1369
1370         if (blizzard.power_down != NULL)
1371                 blizzard.power_down(blizzard.fbdev->dev);
1372 }
1373
1374 static void blizzard_resume(void)
1375 {
1376         u32 l;
1377
1378         if (blizzard.power_up != NULL)
1379                 blizzard.power_up(blizzard.fbdev->dev);
1380
1381         l = blizzard_read_reg(BLIZZARD_POWER_SAVE);
1382         /* Standby, Sleep */
1383         l &= ~0x03;
1384         blizzard_write_reg(BLIZZARD_POWER_SAVE, l);
1385
1386         blizzard_restore_pll_regs();
1387         l = blizzard_read_reg(BLIZZARD_PLL_MODE);
1388         l &= ~0x03;
1389         /* Enable PLL, counter function */
1390         l |= 0x1;
1391         blizzard_write_reg(BLIZZARD_PLL_MODE, l);
1392
1393         while (!(blizzard_read_reg(BLIZZARD_PLL_DIV) & (1 << 7)))
1394                 msleep(1);
1395
1396         blizzard_restart_sdram();
1397
1398         blizzard_restore_gen_regs();
1399
1400         /* Enable display */
1401         blizzard_write_reg(BLIZZARD_DISPLAY_MODE, 0x01);
1402
1403         /* the following will enable clocks as necessary */
1404         blizzard_set_update_mode(blizzard.update_mode_before_suspend);
1405
1406         /* Force a background update */
1407         blizzard.zoom_on = 1;
1408         update_full_screen();
1409         blizzard_sync();
1410 }
1411
1412 static int blizzard_init(struct omapfb_device *fbdev, int ext_mode,
1413                          struct omapfb_mem_desc *req_vram)
1414 {
1415         int r = 0, i;
1416         u8 rev, conf;
1417         unsigned long ext_clk;
1418         int extif_div;
1419         unsigned long sys_clk, pix_clk;
1420         struct omapfb_platform_data *omapfb_conf;
1421         struct blizzard_platform_data *ctrl_conf;
1422
1423         blizzard.fbdev = fbdev;
1424
1425         BUG_ON(!fbdev->ext_if || !fbdev->int_ctrl);
1426
1427         blizzard.fbdev = fbdev;
1428         blizzard.extif = fbdev->ext_if;
1429         blizzard.int_ctrl = fbdev->int_ctrl;
1430
1431         omapfb_conf = fbdev->dev->platform_data;
1432         ctrl_conf = omapfb_conf->ctrl_platform_data;
1433         if (ctrl_conf == NULL || ctrl_conf->get_clock_rate == NULL) {
1434                 dev_err(fbdev->dev, "s1d1374x: missing platform data\n");
1435                 r = -ENOENT;
1436                 goto err1;
1437         }
1438
1439         blizzard.power_down = ctrl_conf->power_down;
1440         blizzard.power_up = ctrl_conf->power_up;
1441
1442         spin_lock_init(&blizzard.req_lock);
1443
1444         if ((r = blizzard.int_ctrl->init(fbdev, 1, req_vram)) < 0)
1445                 goto err1;
1446
1447         if ((r = blizzard.extif->init(fbdev)) < 0)
1448                 goto err2;
1449
1450         blizzard_ctrl.set_color_key = blizzard.int_ctrl->set_color_key;
1451         blizzard_ctrl.get_color_key = blizzard.int_ctrl->get_color_key;
1452         blizzard_ctrl.setup_mem = blizzard.int_ctrl->setup_mem;
1453         blizzard_ctrl.mmap = blizzard.int_ctrl->mmap;
1454
1455         ext_clk = ctrl_conf->get_clock_rate(fbdev->dev);
1456         if ((r = calc_extif_timings(ext_clk, &extif_div)) < 0)
1457                 goto err3;
1458
1459         set_extif_timings(&blizzard.reg_timings);
1460
1461         if (blizzard.power_up != NULL)
1462                 blizzard.power_up(fbdev->dev);
1463
1464         calc_blizzard_clk_rates(ext_clk, &sys_clk, &pix_clk);
1465
1466         if ((r = calc_extif_timings(sys_clk, &extif_div)) < 0)
1467                 goto err3;
1468         set_extif_timings(&blizzard.reg_timings);
1469
1470         if (!(blizzard_read_reg(BLIZZARD_PLL_DIV) & 0x80)) {
1471                 dev_err(fbdev->dev,
1472                         "controller not initialized by the bootloader\n");
1473                 r = -ENODEV;
1474                 goto err3;
1475         }
1476
1477         if (ctrl_conf->te_connected) {
1478                 if ((r = setup_tearsync(pix_clk, extif_div)) < 0)
1479                         goto err3;
1480                 blizzard.te_connected = 1;
1481         }
1482
1483         rev = blizzard_read_reg(BLIZZARD_REV_CODE);
1484         conf = blizzard_read_reg(BLIZZARD_CONFIG);
1485
1486         switch (rev & 0xfc) {
1487         case 0x9c:
1488                 blizzard.version = BLIZZARD_VERSION_S1D13744;
1489                 pr_info("omapfb: s1d13744 LCD controller rev %d "
1490                         "initialized (CNF pins %x)\n", rev & 0x03, conf & 0x07);
1491                 break;
1492         case 0xa4:
1493                 blizzard.version = BLIZZARD_VERSION_S1D13745;
1494                 pr_info("omapfb: s1d13745 LCD controller rev %d "
1495                         "initialized (CNF pins %x)\n", rev & 0x03, conf & 0x07);
1496                 break;
1497         default:
1498                 dev_err(fbdev->dev, "invalid s1d1374x revision %02x\n",
1499                         rev);
1500                 r = -ENODEV;
1501                 goto err3;
1502         }
1503
1504         blizzard.max_transmit_size = blizzard.extif->max_transmit_size;
1505
1506         blizzard.update_mode = OMAPFB_UPDATE_DISABLED;
1507
1508         blizzard.auto_update_window.x = 0;
1509         blizzard.auto_update_window.y = 0;
1510         blizzard.auto_update_window.width = fbdev->panel->x_res;
1511         blizzard.auto_update_window.height = fbdev->panel->y_res;
1512         blizzard.auto_update_window.out_x = 0;
1513         blizzard.auto_update_window.out_x = 0;
1514         blizzard.auto_update_window.out_width = fbdev->panel->x_res;
1515         blizzard.auto_update_window.out_height = fbdev->panel->y_res;
1516         blizzard.auto_update_window.format = 0;
1517
1518         blizzard.screen_width = fbdev->panel->x_res;
1519         blizzard.screen_height = fbdev->panel->y_res;
1520
1521         init_timer(&blizzard.auto_update_timer);
1522         blizzard.auto_update_timer.function = blizzard_update_window_auto;
1523         blizzard.auto_update_timer.data = 0;
1524
1525         INIT_LIST_HEAD(&blizzard.free_req_list);
1526         INIT_LIST_HEAD(&blizzard.pending_req_list);
1527         for (i = 0; i < ARRAY_SIZE(blizzard.req_pool); i++)
1528                 list_add(&blizzard.req_pool[i].entry, &blizzard.free_req_list);
1529         BUG_ON(i <= IRQ_REQ_POOL_SIZE);
1530         sema_init(&blizzard.req_sema, i - IRQ_REQ_POOL_SIZE);
1531
1532         return 0;
1533 err3:
1534         if (blizzard.power_down != NULL)
1535                 blizzard.power_down(fbdev->dev);
1536         blizzard.extif->cleanup();
1537 err2:
1538         blizzard.int_ctrl->cleanup();
1539 err1:
1540         return r;
1541 }
1542
1543 static void blizzard_cleanup(void)
1544 {
1545         blizzard_set_update_mode(OMAPFB_UPDATE_DISABLED);
1546         blizzard.extif->cleanup();
1547         blizzard.int_ctrl->cleanup();
1548         if (blizzard.power_down != NULL)
1549                 blizzard.power_down(blizzard.fbdev->dev);
1550 }
1551
1552 struct lcd_ctrl blizzard_ctrl = {
1553         .name                   = "blizzard",
1554         .init                   = blizzard_init,
1555         .cleanup                = blizzard_cleanup,
1556         .bind_client            = blizzard_bind_client,
1557         .get_caps               = blizzard_get_caps,
1558         .set_update_mode        = blizzard_set_update_mode,
1559         .get_update_mode        = blizzard_get_update_mode,
1560         .setup_plane            = blizzard_setup_plane,
1561         .set_scale              = blizzard_set_scale,
1562         .enable_plane           = blizzard_enable_plane,
1563         .update_window          = blizzard_update_window_async,
1564         .sync                   = blizzard_sync,
1565         .suspend                = blizzard_suspend,
1566         .resume                 = blizzard_resume,
1567 };
1568