drivers/video/omap/blizzard.c

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