Logo Search packages:      
Sourcecode: linux version File versions  Download package

blizzard.c

/*
 * Epson Blizzard LCD controller driver
 *
 * Copyright (C) 2004-2005 Nokia Corporation
 * Authors:     Juha Yrjola   <juha.yrjola@nokia.com>
 *            Imre Deak     <imre.deak@nokia.com>
 * YUV support: Jussi Laako   <jussi.laako@nokia.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/fb.h>
#include <linux/delay.h>
#include <linux/clk.h>

#include <asm/arch/dma.h>
#include <asm/arch/omapfb.h>
#include <asm/arch/blizzard.h>

#include "dispc.h"

#define MODULE_NAME                       "blizzard"

#define BLIZZARD_REV_CODE                 0x00
#define BLIZZARD_CONFIG                   0x02
#define BLIZZARD_PLL_DIV                  0x04
#define BLIZZARD_PLL_LOCK_RANGE                 0x06
#define BLIZZARD_PLL_CLOCK_SYNTH_0        0x08
#define BLIZZARD_PLL_CLOCK_SYNTH_1        0x0a
#define BLIZZARD_PLL_MODE                 0x0c
#define BLIZZARD_CLK_SRC                  0x0e
#define BLIZZARD_MEM_BANK0_ACTIVATE       0x10
#define BLIZZARD_MEM_BANK0_STATUS         0x14
#define BLIZZARD_HDISP                    0x2a
#define BLIZZARD_HNDP                     0x2c
#define BLIZZARD_VDISP0                   0x2e
#define BLIZZARD_VDISP1                   0x30
#define BLIZZARD_VNDP                     0x32
#define BLIZZARD_HSW                      0x34
#define BLIZZARD_VSW                      0x38
#define BLIZZARD_DISPLAY_MODE             0x68
#define BLIZZARD_INPUT_WIN_X_START_0            0x6c
#define BLIZZARD_DATA_SOURCE_SELECT       0x8e
#define BLIZZARD_DISP_MEM_DATA_PORT       0x90
#define BLIZZARD_DISP_MEM_READ_ADDR0            0x92
#define BLIZZARD_POWER_SAVE               0xE6
#define BLIZZARD_NDISP_CTRL_STATUS        0xE8

/* Data source select */
/* For S1D13745 */
#define BLIZZARD_SRC_WRITE_LCD_BACKGROUND 0x00
#define BLIZZARD_SRC_WRITE_LCD_DESTRUCTIVE      0x01
#define BLIZZARD_SRC_WRITE_OVERLAY_ENABLE 0x04
#define BLIZZARD_SRC_DISABLE_OVERLAY            0x05
/* For S1D13744 */
#define BLIZZARD_SRC_WRITE_LCD                  0x00
#define BLIZZARD_SRC_BLT_LCD              0x06

#define BLIZZARD_COLOR_RGB565             0x01
#define BLIZZARD_COLOR_YUV420             0x09

#define BLIZZARD_VERSION_S1D13745         0x01  /* Hailstorm */
#define BLIZZARD_VERSION_S1D13744         0x02  /* Blizzard */

#define BLIZZARD_AUTO_UPDATE_TIME         (HZ / 20)

/* Reserve 4 request slots for requests in irq context */
#define REQ_POOL_SIZE               24
#define IRQ_REQ_POOL_SIZE           4

#define REQ_FROM_IRQ_POOL 0x01

#define REQ_COMPLETE    0
#define REQ_PENDING     1

struct blizzard_reg_list {
      int   start;
      int   end;
};

/* These need to be saved / restored separately from the rest. */
static struct blizzard_reg_list blizzard_pll_regs[] = {
      {
            .start      = 0x04,           /* Don't save PLL ctrl (0x0C) */
            .end  = 0x0a,
      },
      {
            .start      = 0x0e,           /* Clock configuration */
            .end  = 0x0e,
      },
};

static struct blizzard_reg_list blizzard_gen_regs[] = {
      {
            .start      = 0x18,           /* SDRAM control */
            .end  = 0x20,
      },
      {
            .start      = 0x28,           /* LCD Panel configuration */
            .end  = 0x5a,           /* HSSI interface, TV configuration */
      },
};

static u8 blizzard_reg_cache[0x5a / 2];

struct update_param {
      int   plane;
      int   x, y, width, height;
      int   out_x, out_y;
      int   out_width, out_height;
      int   color_mode;
      int   bpp;
      int   flags;
};

struct blizzard_request {
      struct list_head entry;
      unsigned int       flags;

      int          (*handler)(struct blizzard_request *req);
      void         (*complete)(void *data);
      void         *complete_data;

      union {
            struct update_param     update;
            struct completion *sync;
      } par;
};

struct plane_info {
      unsigned long offset;
      int pos_x, pos_y;
      int width, height;
      int out_width, out_height;
      int scr_width;
      int color_mode;
      int bpp;
};

struct blizzard_struct {
      enum omapfb_update_mode update_mode;
      enum omapfb_update_mode update_mode_before_suspend;

      struct timer_list auto_update_timer;
      int               stop_auto_update;
      struct omapfb_update_window   auto_update_window;
      int               enabled_planes;
      int               vid_nonstd_color;
      int               vid_scaled;
      int               last_color_mode;
      int               zoom_on;
      int               screen_width;
      int               screen_height;
      unsigned          te_connected:1;
      unsigned          vsync_only:1;

      struct plane_info plane[OMAPFB_PLANE_NUM];

      struct blizzard_request req_pool[REQ_POOL_SIZE];
      struct list_head  pending_req_list;
      struct list_head  free_req_list;
      struct semaphore  req_sema;
      spinlock_t        req_lock;

      unsigned long           sys_ck_rate;
      struct extif_timings    reg_timings, lut_timings;

      u32               max_transmit_size;
      u32               extif_clk_period;
      int               extif_clk_div;
      unsigned long           pix_tx_time;
      unsigned long           line_upd_time;

      struct omapfb_device    *fbdev;
      struct lcd_ctrl_extif   *extif;
      struct lcd_ctrl         *int_ctrl;

      void              (*power_up)(struct device *dev);
      void              (*power_down)(struct device *dev);

      int               version;
} blizzard;

struct lcd_ctrl blizzard_ctrl;

static u8 blizzard_read_reg(u8 reg)
{
      u8 data;

      blizzard.extif->set_bits_per_cycle(8);
      blizzard.extif->write_command(&reg, 1);
      blizzard.extif->read_data(&data, 1);

      return data;
}

static void blizzard_write_reg(u8 reg, u8 val)
{
      blizzard.extif->set_bits_per_cycle(8);
      blizzard.extif->write_command(&reg, 1);
      blizzard.extif->write_data(&val, 1);
}

static void blizzard_restart_sdram(void)
{
      unsigned long tmo;

      blizzard_write_reg(BLIZZARD_MEM_BANK0_ACTIVATE, 0);
      udelay(50);
      blizzard_write_reg(BLIZZARD_MEM_BANK0_ACTIVATE, 1);
      tmo = jiffies + msecs_to_jiffies(200);
      while (!(blizzard_read_reg(BLIZZARD_MEM_BANK0_STATUS) & 0x01)) {
            if (time_after(jiffies, tmo)) {
                  dev_err(blizzard.fbdev->dev,
                              "s1d1374x: SDRAM not ready\n");
                  break;
            }
            msleep(1);
      }
}

static void blizzard_stop_sdram(void)
{
      blizzard_write_reg(BLIZZARD_MEM_BANK0_ACTIVATE, 0);
}

/* Wait until the last window was completely written into the controllers
 * SDRAM and we can start transferring the next window.
 */
static void blizzard_wait_line_buffer(void)
{
      unsigned long tmo = jiffies + msecs_to_jiffies(30);

      while (blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS) & (1 << 7)) {
            if (time_after(jiffies, tmo)) {
                  if (printk_ratelimit())
                        dev_err(blizzard.fbdev->dev,
                              "s1d1374x: line buffer not ready\n");
                  break;
            }
      }
}

/* Wait until the YYC color space converter is idle. */
static void blizzard_wait_yyc(void)
{
      unsigned long tmo = jiffies + msecs_to_jiffies(30);

      while (blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS) & (1 << 4)) {
            if (time_after(jiffies, tmo)) {
                  if (printk_ratelimit())
                        dev_err(blizzard.fbdev->dev,
                              "s1d1374x: YYC not ready\n");
                  break;
            }
      }
}

static void disable_overlay(void)
{
      blizzard_write_reg(BLIZZARD_DATA_SOURCE_SELECT,
                        BLIZZARD_SRC_DISABLE_OVERLAY);
}

static void set_window_regs(int x_start, int y_start, int x_end, int y_end,
                      int x_out_start, int y_out_start,
                      int x_out_end, int y_out_end, int color_mode,
                      int zoom_off, int flags)
{
      u8 tmp[18];
      u8 cmd;

      x_end--;
      y_end--;
      tmp[0] = x_start;
      tmp[1] = x_start >> 8;
      tmp[2] = y_start;
      tmp[3] = y_start >> 8;
      tmp[4] = x_end;
      tmp[5] = x_end >> 8;
      tmp[6] = y_end;
      tmp[7] = y_end >> 8;

      x_out_end--;
      y_out_end--;
      tmp[8]  = x_out_start;
      tmp[9]  = x_out_start >> 8;
      tmp[10] = y_out_start;
      tmp[11] = y_out_start >> 8;
      tmp[12] = x_out_end;
      tmp[13] = x_out_end >> 8;
      tmp[14] = y_out_end;
      tmp[15] = y_out_end >> 8;

      tmp[16] = color_mode;
      if (zoom_off && blizzard.version == BLIZZARD_VERSION_S1D13745)
            tmp[17] = BLIZZARD_SRC_WRITE_LCD_BACKGROUND;
      else if (flags & OMAPFB_FORMAT_FLAG_ENABLE_OVERLAY)
            tmp[17] = BLIZZARD_SRC_WRITE_OVERLAY_ENABLE;
      else
            tmp[17] = blizzard.version == BLIZZARD_VERSION_S1D13744 ?
                        BLIZZARD_SRC_WRITE_LCD :
                        BLIZZARD_SRC_WRITE_LCD_DESTRUCTIVE;

      blizzard.extif->set_bits_per_cycle(8);
      cmd = BLIZZARD_INPUT_WIN_X_START_0;
      blizzard.extif->write_command(&cmd, 1);
      blizzard.extif->write_data(tmp, 18);
}

static void enable_tearsync(int y, int width, int height, int screen_height,
                      int out_height, int force_vsync)
{
      u8 b;

      b = blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS);
      b |= 1 << 3;
      blizzard_write_reg(BLIZZARD_NDISP_CTRL_STATUS, b);

      if (likely(blizzard.vsync_only || force_vsync)) {
            blizzard.extif->enable_tearsync(1, 0);
            return;
      }

      if (width * blizzard.pix_tx_time < blizzard.line_upd_time) {
            blizzard.extif->enable_tearsync(1, 0);
            return;
      }

      if ((width * blizzard.pix_tx_time / 1000) * height <
          (y + out_height) * (blizzard.line_upd_time / 1000)) {
            blizzard.extif->enable_tearsync(1, 0);
            return;
      }

      blizzard.extif->enable_tearsync(1, y + 1);
}

static void disable_tearsync(void)
{
      u8 b;

      blizzard.extif->enable_tearsync(0, 0);
      b = blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS);
      b &= ~(1 << 3);
      blizzard_write_reg(BLIZZARD_NDISP_CTRL_STATUS, b);
      b = blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS);
}

static inline void set_extif_timings(const struct extif_timings *t);

static inline struct blizzard_request *alloc_req(void)
{
      unsigned long flags;
      struct blizzard_request *req;
      int req_flags = 0;

      if (!in_interrupt())
            down(&blizzard.req_sema);
      else
            req_flags = REQ_FROM_IRQ_POOL;

      spin_lock_irqsave(&blizzard.req_lock, flags);
      BUG_ON(list_empty(&blizzard.free_req_list));
      req = list_entry(blizzard.free_req_list.next,
                   struct blizzard_request, entry);
      list_del(&req->entry);
      spin_unlock_irqrestore(&blizzard.req_lock, flags);

      INIT_LIST_HEAD(&req->entry);
      req->flags = req_flags;

      return req;
}

static inline void free_req(struct blizzard_request *req)
{
      unsigned long flags;

      spin_lock_irqsave(&blizzard.req_lock, flags);

      list_del(&req->entry);
      list_add(&req->entry, &blizzard.free_req_list);
      if (!(req->flags & REQ_FROM_IRQ_POOL))
            up(&blizzard.req_sema);

      spin_unlock_irqrestore(&blizzard.req_lock, flags);
}

static void process_pending_requests(void)
{
      unsigned long flags;

      spin_lock_irqsave(&blizzard.req_lock, flags);

      while (!list_empty(&blizzard.pending_req_list)) {
            struct blizzard_request *req;
            void (*complete)(void *);
            void *complete_data;

            req = list_entry(blizzard.pending_req_list.next,
                         struct blizzard_request, entry);
            spin_unlock_irqrestore(&blizzard.req_lock, flags);

            if (req->handler(req) == REQ_PENDING)
                  return;

            complete = req->complete;
            complete_data = req->complete_data;
            free_req(req);

            if (complete)
                  complete(complete_data);

            spin_lock_irqsave(&blizzard.req_lock, flags);
      }

      spin_unlock_irqrestore(&blizzard.req_lock, flags);
}

static void submit_req_list(struct list_head *head)
{
      unsigned long flags;
      int process = 1;

      spin_lock_irqsave(&blizzard.req_lock, flags);
      if (likely(!list_empty(&blizzard.pending_req_list)))
            process = 0;
      list_splice_init(head, blizzard.pending_req_list.prev);
      spin_unlock_irqrestore(&blizzard.req_lock, flags);

      if (process)
            process_pending_requests();
}

static void request_complete(void *data)
{
      struct blizzard_request *req = (struct blizzard_request *)data;
      void              (*complete)(void *);
      void              *complete_data;

      complete = req->complete;
      complete_data = req->complete_data;

      free_req(req);

      if (complete)
            complete(complete_data);

      process_pending_requests();
}


static int do_full_screen_update(struct blizzard_request *req)
{
      int i;
      int flags;

      for (i = 0; i < 3; i++) {
            struct plane_info *p = &blizzard.plane[i];
            if (!(blizzard.enabled_planes & (1 << i))) {
                  blizzard.int_ctrl->enable_plane(i, 0);
                  continue;
            }
            dev_dbg(blizzard.fbdev->dev, "pw %d ph %d\n",
                  p->width, p->height);
            blizzard.int_ctrl->setup_plane(i,
                        OMAPFB_CHANNEL_OUT_LCD, p->offset,
                        p->scr_width, p->pos_x, p->pos_y,
                        p->width, p->height,
                        p->color_mode);
            blizzard.int_ctrl->enable_plane(i, 1);
      }

      dev_dbg(blizzard.fbdev->dev, "sw %d sh %d\n",
            blizzard.screen_width, blizzard.screen_height);
      blizzard_wait_line_buffer();
      flags = req->par.update.flags;
      if (flags & OMAPFB_FORMAT_FLAG_TEARSYNC)
            enable_tearsync(0, blizzard.screen_width,
                        blizzard.screen_height,
                        blizzard.screen_height,
                        blizzard.screen_height,
                        flags & OMAPFB_FORMAT_FLAG_FORCE_VSYNC);
      else
            disable_tearsync();

      set_window_regs(0, 0, blizzard.screen_width, blizzard.screen_height,
                  0, 0, blizzard.screen_width, blizzard.screen_height,
                  BLIZZARD_COLOR_RGB565, blizzard.zoom_on, flags);
      blizzard.zoom_on = 0;

      blizzard.extif->set_bits_per_cycle(16);
      /* set_window_regs has left the register index at the right
       * place, so no need to set it here.
       */
      blizzard.extif->transfer_area(blizzard.screen_width,
                              blizzard.screen_height,
                              request_complete, req);
      return REQ_PENDING;
}

/* Setup all planes with an overlapping area with the update window. */
static int do_partial_update(struct blizzard_request *req, int plane,
                       int x, int y, int w, int h,
                       int x_out, int y_out, int w_out, int h_out,
                       int wnd_color_mode, int bpp)
{
      int i;
      int gx1, gy1, gx2, gy2;
      int gx1_out, gy1_out, gx2_out, gy2_out;
      int color_mode;
      int flags;
      int zoom_off;

      /* Global coordinates, relative to pixel 0,0 of the LCD */
      gx1 = x + blizzard.plane[plane].pos_x;
      gy1 = y + blizzard.plane[plane].pos_y;
      gx2 = gx1 + w;
      gy2 = gy1 + h;

      flags = req->par.update.flags;
      if (flags & OMAPFB_FORMAT_FLAG_DOUBLE) {
            gx1_out = gx1;
            gy1_out = gy1;
            gx2_out = gx1 + w * 2;
            gy2_out = gy1 + h * 2;
      } else {
            gx1_out = x_out + blizzard.plane[plane].pos_x;
            gy1_out = y_out + blizzard.plane[plane].pos_y;
            gx2_out = gx1_out + w_out;
            gy2_out = gy1_out + h_out;
      }
      zoom_off = blizzard.zoom_on && gx1 == 0 && gy1 == 0 &&
            w == blizzard.screen_width && h == blizzard.screen_height;
      blizzard.zoom_on = (!zoom_off && blizzard.zoom_on) ||
                     (w < w_out || h < h_out);

      for (i = 0; i < OMAPFB_PLANE_NUM; i++) {
            struct plane_info *p = &blizzard.plane[i];
            int px1, py1;
            int px2, py2;
            int pw, ph;
            int pposx, pposy;
            unsigned long offset;

            if (!(blizzard.enabled_planes & (1 << i))  ||
                (wnd_color_mode && i != plane)) {
                  blizzard.int_ctrl->enable_plane(i, 0);
                  continue;
            }
            /* Plane coordinates */
            if (i == plane) {
                  /* Plane in which we are doing the update.
                   * Local coordinates are the one in the update
                   * request.
                   */
                  px1 = x;
                  py1 = y;
                  px2 = x + w;
                  py2 = y + h;
                  pposx = 0;
                  pposy = 0;
            } else {
                  /* Check if this plane has an overlapping part */
                  px1 = gx1 - p->pos_x;
                  py1 = gy1 - p->pos_y;
                  px2 = gx2 - p->pos_x;
                  py2 = gy2 - p->pos_y;
                  if (px1 >= p->width || py1 >= p->height ||
                      px2 <= 0 || py2 <= 0) {
                        blizzard.int_ctrl->enable_plane(i, 0);
                        continue;
                  }
                  /* Calculate the coordinates for the overlapping
                   * part in the plane's local coordinates.
                   */
                  pposx = -px1;
                  pposy = -py1;
                  if (px1 < 0)
                        px1 = 0;
                  if (py1 < 0)
                        py1 = 0;
                  if (px2 > p->width)
                        px2 = p->width;
                  if (py2 > p->height)
                        py2 = p->height;
                  if (pposx < 0)
                        pposx = 0;
                  if (pposy < 0)
                        pposy = 0;
            }
            pw = px2 - px1;
            ph = py2 - py1;
            offset = p->offset + (p->scr_width * py1 + px1) * p->bpp / 8;
            if (wnd_color_mode)
                  /* Window embedded in the plane with a differing
                   * color mode / bpp. Calculate the number of DMA
                   * transfer elements in terms of the plane's bpp.
                   */
                  pw = (pw + 1) * bpp / p->bpp;
#ifdef VERBOSE
            dev_dbg(blizzard.fbdev->dev,
                  "plane %d offset %#08lx pposx %d pposy %d "
                  "px1 %d py1 %d pw %d ph %d\n",
                  i, offset, pposx, pposy, px1, py1, pw, ph);
#endif
            blizzard.int_ctrl->setup_plane(i,
                        OMAPFB_CHANNEL_OUT_LCD, offset,
                        p->scr_width,
                        pposx, pposy, pw, ph,
                        p->color_mode);

            blizzard.int_ctrl->enable_plane(i, 1);
      }

      switch (wnd_color_mode) {
      case OMAPFB_COLOR_YUV420:
            color_mode = BLIZZARD_COLOR_YUV420;
            /* Currently only the 16 bits/pixel cycle format is
             * supported on the external interface. Adjust the number
             * of transfer elements per line for 12bpp format.
             */
            w = (w + 1) * 3 / 4;
            break;
      default:
            color_mode = BLIZZARD_COLOR_RGB565;
            break;
      }

      blizzard_wait_line_buffer();
      if (blizzard.last_color_mode == BLIZZARD_COLOR_YUV420)
            blizzard_wait_yyc();
      blizzard.last_color_mode = color_mode;
      if (flags & OMAPFB_FORMAT_FLAG_TEARSYNC)
            enable_tearsync(gy1, w, h,
                        blizzard.screen_height,
                        h_out,
                        flags & OMAPFB_FORMAT_FLAG_FORCE_VSYNC);
      else
            disable_tearsync();

      set_window_regs(gx1, gy1, gx2, gy2, gx1_out, gy1_out, gx2_out, gy2_out,
                  color_mode, zoom_off, flags);

      blizzard.extif->set_bits_per_cycle(16);
      /* set_window_regs has left the register index at the right
       * place, so no need to set it here.
       */
      blizzard.extif->transfer_area(w, h, request_complete, req);

      return REQ_PENDING;
}

static int send_frame_handler(struct blizzard_request *req)
{
      struct update_param *par = &req->par.update;
      int plane = par->plane;

#ifdef VERBOSE
      dev_dbg(blizzard.fbdev->dev,
            "send_frame: x %d y %d w %d h %d "
            "x_out %d y_out %d w_out %d h_out %d "
            "color_mode %04x flags %04x planes %01x\n",
            par->x, par->y, par->width, par->height,
            par->out_x, par->out_y, par->out_width, par->out_height,
            par->color_mode, par->flags, blizzard.enabled_planes);
#endif
      if (par->flags & OMAPFB_FORMAT_FLAG_DISABLE_OVERLAY)
            disable_overlay();

      if ((blizzard.enabled_planes & blizzard.vid_nonstd_color) ||
           (blizzard.enabled_planes & blizzard.vid_scaled))
            return do_full_screen_update(req);

      return do_partial_update(req, plane, par->x, par->y,
                         par->width, par->height,
                         par->out_x, par->out_y,
                         par->out_width, par->out_height,
                         par->color_mode, par->bpp);
}

static void send_frame_complete(void *data)
{
}

#define ADD_PREQ(_x, _y, _w, _h, _x_out, _y_out, _w_out, _h_out) do {   \
      req = alloc_req();                  \
      req->handler      = send_frame_handler;   \
      req->complete     = send_frame_complete;  \
      req->par.update.plane = plane_idx;  \
      req->par.update.x = _x;             \
      req->par.update.y = _y;             \
      req->par.update.width  = _w;        \
      req->par.update.height = _h;        \
      req->par.update.out_x = _x_out;           \
      req->par.update.out_y = _y_out;           \
      req->par.update.out_width = _w_out; \
      req->par.update.out_height = _h_out;      \
      req->par.update.bpp = bpp;          \
      req->par.update.color_mode = color_mode;\
      req->par.update.flags     = flags;  \
      list_add_tail(&req->entry, req_head);     \
} while(0)

static void create_req_list(int plane_idx,
                      struct omapfb_update_window *win,
                      struct list_head *req_head)
{
      struct blizzard_request *req;
      int x = win->x;
      int y = win->y;
      int width = win->width;
      int height = win->height;
      int x_out = win->out_x;
      int y_out = win->out_y;
      int width_out = win->out_width;
      int height_out = win->out_height;
      int color_mode;
      int bpp;
      int flags;
      unsigned int ystart = y;
      unsigned int yspan = height;
      unsigned int ystart_out = y_out;
      unsigned int yspan_out = height_out;

      flags = win->format & ~OMAPFB_FORMAT_MASK;
      color_mode = win->format & OMAPFB_FORMAT_MASK;
      switch (color_mode) {
      case OMAPFB_COLOR_YUV420:
            /* Embedded window with different color mode */
            bpp = 12;
            /* X, Y, height must be aligned at 2, width at 4 pixels */
            x &= ~1;
            y &= ~1;
            height = yspan = height & ~1;
            width = width & ~3;
            break;
      default:
            /* Same as the plane color mode */
            bpp = blizzard.plane[plane_idx].bpp;
            break;
      }
      if (width * height * bpp / 8 > blizzard.max_transmit_size) {
            yspan = blizzard.max_transmit_size / (width * bpp / 8);
            yspan_out = yspan * height_out / height;
            ADD_PREQ(x, ystart, width, yspan, x_out, ystart_out,
                   width_out, yspan_out);
            ystart += yspan;
            ystart_out += yspan_out;
            yspan = height - yspan;
            yspan_out = height_out - yspan_out;
            flags &= ~OMAPFB_FORMAT_FLAG_TEARSYNC;
      }

      ADD_PREQ(x, ystart, width, yspan, x_out, ystart_out,
             width_out, yspan_out);
}

static void auto_update_complete(void *data)
{
      if (!blizzard.stop_auto_update)
            mod_timer(&blizzard.auto_update_timer,
                    jiffies + BLIZZARD_AUTO_UPDATE_TIME);
}

static void blizzard_update_window_auto(unsigned long arg)
{
      LIST_HEAD(req_list);
      struct blizzard_request *last;
      struct omapfb_plane_struct *plane;

      plane = blizzard.fbdev->fb_info[0]->par;
      create_req_list(plane->idx,
                  &blizzard.auto_update_window, &req_list);
      last = list_entry(req_list.prev, struct blizzard_request, entry);

      last->complete = auto_update_complete;
      last->complete_data = NULL;

      submit_req_list(&req_list);
}

int blizzard_update_window_async(struct fb_info *fbi,
                         struct omapfb_update_window *win,
                         void (*complete_callback)(void *arg),
                         void *complete_callback_data)
{
      LIST_HEAD(req_list);
      struct blizzard_request *last;
      struct omapfb_plane_struct *plane = fbi->par;

      if (unlikely(blizzard.update_mode != OMAPFB_MANUAL_UPDATE))
            return -EINVAL;
      if (unlikely(!blizzard.te_connected &&
                 (win->format & OMAPFB_FORMAT_FLAG_TEARSYNC)))
            return -EINVAL;

      create_req_list(plane->idx, win, &req_list);
      last = list_entry(req_list.prev, struct blizzard_request, entry);

      last->complete = complete_callback;
      last->complete_data = (void *)complete_callback_data;

      submit_req_list(&req_list);

      return 0;
}
EXPORT_SYMBOL(blizzard_update_window_async);

static int update_full_screen(void)
{
      return blizzard_update_window_async(blizzard.fbdev->fb_info[0],
                             &blizzard.auto_update_window, NULL, NULL);

}

static int blizzard_setup_plane(int plane, int channel_out,
                          unsigned long offset, int screen_width,
                          int pos_x, int pos_y, int width, int height,
                          int color_mode)
{
      struct plane_info *p;

#ifdef VERBOSE
      dev_dbg(blizzard.fbdev->dev,
                "plane %d ch_out %d offset %#08lx scr_width %d "
                "pos_x %d pos_y %d width %d height %d color_mode %d\n",
                plane, channel_out, offset, screen_width,
                pos_x, pos_y, width, height, color_mode);
#endif
      if ((unsigned)plane > OMAPFB_PLANE_NUM)
            return -EINVAL;
      p = &blizzard.plane[plane];

      switch (color_mode) {
      case OMAPFB_COLOR_YUV422:
      case OMAPFB_COLOR_YUY422:
            p->bpp = 16;
            blizzard.vid_nonstd_color &= ~(1 << plane);
            break;
      case OMAPFB_COLOR_YUV420:
            p->bpp = 12;
            blizzard.vid_nonstd_color |= 1 << plane;
            break;
      case OMAPFB_COLOR_RGB565:
            p->bpp = 16;
            blizzard.vid_nonstd_color &= ~(1 << plane);
            break;
      default:
            return -EINVAL;
      }

      p->offset = offset;
      p->pos_x = pos_x;
      p->pos_y = pos_y;
      p->width = width;
      p->height = height;
      p->scr_width = screen_width;
      if (!p->out_width)
            p->out_width = width;
      if (!p->out_height)
            p->out_height = height;

      p->color_mode = color_mode;

      return 0;
}

static int blizzard_set_scale(int plane, int orig_w, int orig_h,
                        int out_w, int out_h)
{
      struct plane_info *p = &blizzard.plane[plane];
      int r;

      dev_dbg(blizzard.fbdev->dev,
            "plane %d orig_w %d orig_h %d out_w %d out_h %d\n",
            plane, orig_w, orig_h, out_w, out_h);
      if ((unsigned)plane > OMAPFB_PLANE_NUM)
            return -ENODEV;

      r = blizzard.int_ctrl->set_scale(plane, orig_w, orig_h, out_w, out_h);
      if (r < 0)
            return r;

      p->width = orig_w;
      p->height = orig_h;
      p->out_width = out_w;
      p->out_height = out_h;
      if (orig_w == out_w && orig_h == out_h)
            blizzard.vid_scaled &= ~(1 << plane);
      else
            blizzard.vid_scaled |= 1 << plane;

      return 0;
}

static int blizzard_enable_plane(int plane, int enable)
{
      if (enable)
            blizzard.enabled_planes |= 1 << plane;
      else
            blizzard.enabled_planes &= ~(1 << plane);

      return 0;
}

static int sync_handler(struct blizzard_request *req)
{
      complete(req->par.sync);
      return REQ_COMPLETE;
}

static void blizzard_sync(void)
{
      LIST_HEAD(req_list);
      struct blizzard_request *req;
      struct completion comp;

      req = alloc_req();

      req->handler = sync_handler;
      req->complete = NULL;
      init_completion(&comp);
      req->par.sync = &comp;

      list_add(&req->entry, &req_list);
      submit_req_list(&req_list);

      wait_for_completion(&comp);
}


static void blizzard_bind_client(struct omapfb_notifier_block *nb)
{
      if (blizzard.update_mode == OMAPFB_MANUAL_UPDATE) {
            omapfb_notify_clients(blizzard.fbdev, OMAPFB_EVENT_READY);
      }
}

static int blizzard_set_update_mode(enum omapfb_update_mode mode)
{
      if (unlikely(mode != OMAPFB_MANUAL_UPDATE &&
                 mode != OMAPFB_AUTO_UPDATE &&
                 mode != OMAPFB_UPDATE_DISABLED))
            return -EINVAL;

      if (mode == blizzard.update_mode)
            return 0;

      dev_info(blizzard.fbdev->dev, "s1d1374x: setting update mode to %s\n",
                  mode == OMAPFB_UPDATE_DISABLED ? "disabled" :
                  (mode == OMAPFB_AUTO_UPDATE ? "auto" : "manual"));

      switch (blizzard.update_mode) {
      case OMAPFB_MANUAL_UPDATE:
            omapfb_notify_clients(blizzard.fbdev, OMAPFB_EVENT_DISABLED);
            break;
      case OMAPFB_AUTO_UPDATE:
            blizzard.stop_auto_update = 1;
            del_timer_sync(&blizzard.auto_update_timer);
            break;
      case OMAPFB_UPDATE_DISABLED:
            break;
      }

      blizzard.update_mode = mode;
      blizzard_sync();
      blizzard.stop_auto_update = 0;

      switch (mode) {
      case OMAPFB_MANUAL_UPDATE:
            omapfb_notify_clients(blizzard.fbdev, OMAPFB_EVENT_READY);
            break;
      case OMAPFB_AUTO_UPDATE:
            blizzard_update_window_auto(0);
            break;
      case OMAPFB_UPDATE_DISABLED:
            break;
      }

      return 0;
}

static enum omapfb_update_mode blizzard_get_update_mode(void)
{
      return blizzard.update_mode;
}

static inline void set_extif_timings(const struct extif_timings *t)
{
      blizzard.extif->set_timings(t);
}

static inline unsigned long round_to_extif_ticks(unsigned long ps, int div)
{
      int bus_tick = blizzard.extif_clk_period * div;
      return (ps + bus_tick - 1) / bus_tick * bus_tick;
}

static int calc_reg_timing(unsigned long sysclk, int div)
{
      struct extif_timings *t;
      unsigned long systim;

      /* CSOnTime 0, WEOnTime 2 ns, REOnTime 2 ns,
       * AccessTime 2 ns + 12.2 ns (regs),
       * WEOffTime = WEOnTime + 1 ns,
       * REOffTime = REOnTime + 12 ns (regs),
       * CSOffTime = REOffTime + 1 ns
       * ReadCycle = 2ns + 2*SYSCLK  (regs),
       * WriteCycle = 2*SYSCLK + 2 ns,
       * CSPulseWidth = 10 ns */

      systim = 1000000000 / (sysclk / 1000);
      dev_dbg(blizzard.fbdev->dev,
              "Blizzard systim %lu ps extif_clk_period %u div %d\n",
              systim, blizzard.extif_clk_period, div);

      t = &blizzard.reg_timings;
      memset(t, 0, sizeof(*t));

      t->clk_div = div;

      t->cs_on_time = 0;
      t->we_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div);
      t->re_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div);
      t->access_time = round_to_extif_ticks(t->re_on_time + 12200, div);
      t->we_off_time = round_to_extif_ticks(t->we_on_time + 1000, div);
      t->re_off_time = round_to_extif_ticks(t->re_on_time + 13000, div);
      t->cs_off_time = round_to_extif_ticks(t->re_off_time + 1000, div);
      t->we_cycle_time = round_to_extif_ticks(2 * systim + 2000, div);
      if (t->we_cycle_time < t->we_off_time)
            t->we_cycle_time = t->we_off_time;
      t->re_cycle_time = round_to_extif_ticks(2 * systim + 2000, div);
      if (t->re_cycle_time < t->re_off_time)
            t->re_cycle_time = t->re_off_time;
      t->cs_pulse_width = 0;

      dev_dbg(blizzard.fbdev->dev, "[reg]cson %d csoff %d reon %d reoff %d\n",
             t->cs_on_time, t->cs_off_time, t->re_on_time, t->re_off_time);
      dev_dbg(blizzard.fbdev->dev, "[reg]weon %d weoff %d recyc %d wecyc %d\n",
             t->we_on_time, t->we_off_time, t->re_cycle_time,
             t->we_cycle_time);
      dev_dbg(blizzard.fbdev->dev, "[reg]rdaccess %d cspulse %d\n",
             t->access_time, t->cs_pulse_width);

      return blizzard.extif->convert_timings(t);
}

static int calc_lut_timing(unsigned long sysclk, int div)
{
      struct extif_timings *t;
      unsigned long systim;

      /* CSOnTime 0, WEOnTime 2 ns, REOnTime 2 ns,
       * AccessTime 2 ns + 4 * SYSCLK + 26 (lut),
       * WEOffTime = WEOnTime + 1 ns,
       * REOffTime = REOnTime + 4*SYSCLK + 26 ns (lut),
       * CSOffTime = REOffTime + 1 ns
       * ReadCycle = 2ns + 4*SYSCLK + 26 ns (lut),
       * WriteCycle = 2*SYSCLK + 2 ns,
       * CSPulseWidth = 10 ns */

      systim = 1000000000 / (sysclk / 1000);
      dev_dbg(blizzard.fbdev->dev,
            "Blizzard systim %lu ps extif_clk_period %u div %d\n",
            systim, blizzard.extif_clk_period, div);

      t = &blizzard.lut_timings;
      memset(t, 0, sizeof(*t));

      t->clk_div = div;

      t->cs_on_time = 0;
      t->we_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div);
      t->re_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div);
      t->access_time = round_to_extif_ticks(t->re_on_time + 4 * systim +
                                    26000, div);
      t->we_off_time = round_to_extif_ticks(t->we_on_time + 1000, div);
      t->re_off_time = round_to_extif_ticks(t->re_on_time + 4 * systim +
                                    26000, div);
      t->cs_off_time = round_to_extif_ticks(t->re_off_time + 1000, div);
      t->we_cycle_time = round_to_extif_ticks(2 * systim + 2000, div);
      if (t->we_cycle_time < t->we_off_time)
            t->we_cycle_time = t->we_off_time;
      t->re_cycle_time = round_to_extif_ticks(2000 + 4 * systim + 26000, div);
      if (t->re_cycle_time < t->re_off_time)
            t->re_cycle_time = t->re_off_time;
      t->cs_pulse_width = 0;

      dev_dbg(blizzard.fbdev->dev,
             "[lut]cson %d csoff %d reon %d reoff %d\n",
             t->cs_on_time, t->cs_off_time, t->re_on_time, t->re_off_time);
      dev_dbg(blizzard.fbdev->dev,
             "[lut]weon %d weoff %d recyc %d wecyc %d\n",
             t->we_on_time, t->we_off_time, t->re_cycle_time,
             t->we_cycle_time);
      dev_dbg(blizzard.fbdev->dev, "[lut]rdaccess %d cspulse %d\n",
             t->access_time, t->cs_pulse_width);

      return blizzard.extif->convert_timings(t);
}

static int calc_extif_timings(unsigned long sysclk, int *extif_mem_div)
{
      int max_clk_div;
      int div;

      blizzard.extif->get_clk_info(&blizzard.extif_clk_period, &max_clk_div);
      for (div = 1; div <= max_clk_div; div++) {
            if (calc_reg_timing(sysclk, div) == 0)
                  break;
      }
      if (div > max_clk_div) {
            dev_dbg(blizzard.fbdev->dev, "reg timing failed\n");
            goto err;
      }
      *extif_mem_div = div;

      for (div = 1; div <= max_clk_div; div++) {
            if (calc_lut_timing(sysclk, div) == 0)
                  break;
      }

      if (div > max_clk_div)
            goto err;

      blizzard.extif_clk_div = div;

      return 0;
err:
      dev_err(blizzard.fbdev->dev, "can't setup timings\n");
      return -1;
}

static void calc_blizzard_clk_rates(unsigned long ext_clk,
                        unsigned long *sys_clk, unsigned long *pix_clk)
{
      int pix_clk_src;
      int sys_div = 0, sys_mul = 0;
      int pix_div;

      pix_clk_src = blizzard_read_reg(BLIZZARD_CLK_SRC);
      pix_div = ((pix_clk_src >> 3) & 0x1f) + 1;
      if ((pix_clk_src & (0x3 << 1)) == 0) {
            /* Source is the PLL */
            sys_div = (blizzard_read_reg(BLIZZARD_PLL_DIV) & 0x3f) + 1;
            sys_mul = blizzard_read_reg(BLIZZARD_PLL_CLOCK_SYNTH_0);
            sys_mul |= ((blizzard_read_reg(BLIZZARD_PLL_CLOCK_SYNTH_1)
                        & 0x0f)     << 11);
            *sys_clk = ext_clk * sys_mul / sys_div;
      } else      /* else source is ext clk, or oscillator */
            *sys_clk = ext_clk;

      *pix_clk = *sys_clk / pix_div;                  /* HZ */
      dev_dbg(blizzard.fbdev->dev,
            "ext_clk %ld pix_src %d pix_div %d sys_div %d sys_mul %d\n",
            ext_clk, pix_clk_src & (0x3 << 1), pix_div, sys_div, sys_mul);
      dev_dbg(blizzard.fbdev->dev, "sys_clk %ld pix_clk %ld\n",
            *sys_clk, *pix_clk);
}

static int setup_tearsync(unsigned long pix_clk, int extif_div)
{
      int hdisp, vdisp;
      int hndp, vndp;
      int hsw, vsw;
      int hs, vs;
      int hs_pol_inv, vs_pol_inv;
      int use_hsvs, use_ndp;
      u8  b;

      hsw = blizzard_read_reg(BLIZZARD_HSW);
      vsw = blizzard_read_reg(BLIZZARD_VSW);
      hs_pol_inv = !(hsw & 0x80);
      vs_pol_inv = !(vsw & 0x80);
      hsw = hsw & 0x7f;
      vsw = vsw & 0x3f;

      hdisp = blizzard_read_reg(BLIZZARD_HDISP) * 8;
      vdisp = blizzard_read_reg(BLIZZARD_VDISP0) +
            ((blizzard_read_reg(BLIZZARD_VDISP1) & 0x3) << 8);

      hndp = blizzard_read_reg(BLIZZARD_HNDP) & 0x3f;
      vndp = blizzard_read_reg(BLIZZARD_VNDP);

      /* time to transfer one pixel (16bpp) in ps */
      blizzard.pix_tx_time = blizzard.reg_timings.we_cycle_time;
      if (blizzard.extif->get_max_tx_rate != NULL) {
            /* The external interface might have a rate limitation,
             * if so, we have to maximize our transfer rate.
             */
            unsigned long min_tx_time;
            unsigned long max_tx_rate = blizzard.extif->get_max_tx_rate();

            dev_dbg(blizzard.fbdev->dev, "max_tx_rate %ld HZ\n",
                  max_tx_rate);
            min_tx_time = 1000000000 / (max_tx_rate / 1000);  /* ps */
            if (blizzard.pix_tx_time < min_tx_time)
                  blizzard.pix_tx_time = min_tx_time;
      }

      /* time to update one line in ps */
      blizzard.line_upd_time = (hdisp + hndp) * 1000000 / (pix_clk / 1000);
      blizzard.line_upd_time *= 1000;
      if (hdisp * blizzard.pix_tx_time > blizzard.line_upd_time)
            /* transfer speed too low, we might have to use both
             * HS and VS */
            use_hsvs = 1;
      else
            /* decent transfer speed, we'll always use only VS */
            use_hsvs = 0;

      if (use_hsvs && (hs_pol_inv || vs_pol_inv)) {
            /* HS or'ed with VS doesn't work, use the active high
             * TE signal based on HNDP / VNDP */
            use_ndp = 1;
            hs_pol_inv = 0;
            vs_pol_inv = 0;
            hs = hndp;
            vs = vndp;
      } else {
            /* Use HS or'ed with VS as a TE signal if both are needed
             * or VNDP if only vsync is needed. */
            use_ndp = 0;
            hs = hsw;
            vs = vsw;
            if (!use_hsvs) {
                  hs_pol_inv = 0;
                  vs_pol_inv = 0;
            }
      }

      hs = hs * 1000000 / (pix_clk / 1000);             /* ps */
      hs *= 1000;

      vs = vs * (hdisp + hndp) * 1000000 / (pix_clk / 1000); /* ps */
      vs *= 1000;

      if (vs <= hs)
            return -EDOM;
      /* set VS to 120% of HS to minimize VS detection time */
      vs = hs * 12 / 10;
      /* minimize HS too */
      if (hs > 10000)
            hs = 10000;

      b = blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS);
      b &= ~0x3;
      b |= use_hsvs ? 1 : 0;
      b |= (use_ndp && use_hsvs) ? 0 : 2;
      blizzard_write_reg(BLIZZARD_NDISP_CTRL_STATUS, b);

      blizzard.vsync_only = !use_hsvs;

      dev_dbg(blizzard.fbdev->dev,
            "pix_clk %ld HZ pix_tx_time %ld ps line_upd_time %ld ps\n",
            pix_clk, blizzard.pix_tx_time, blizzard.line_upd_time);
      dev_dbg(blizzard.fbdev->dev,
            "hs %d ps vs %d ps mode %d vsync_only %d\n",
            hs, vs, b & 0x3, !use_hsvs);

      return blizzard.extif->setup_tearsync(1, hs, vs,
                                    hs_pol_inv, vs_pol_inv,
                                    extif_div);
}

static void blizzard_get_caps(int plane, struct omapfb_caps *caps)
{
      blizzard.int_ctrl->get_caps(plane, caps);
      caps->ctrl |= OMAPFB_CAPS_MANUAL_UPDATE |
            OMAPFB_CAPS_WINDOW_PIXEL_DOUBLE |
            OMAPFB_CAPS_WINDOW_SCALE |
            OMAPFB_CAPS_WINDOW_OVERLAY;
      if (blizzard.te_connected)
            caps->ctrl |= OMAPFB_CAPS_TEARSYNC;
      caps->wnd_color |= (1 << OMAPFB_COLOR_RGB565) |
                     (1 << OMAPFB_COLOR_YUV420);
}

static void _save_regs(struct blizzard_reg_list *list, int cnt)
{
      int i;

      for (i = 0; i < cnt; i++, list++) {
            int reg;
            for (reg = list->start; reg <= list->end; reg += 2)
                  blizzard_reg_cache[reg / 2] = blizzard_read_reg(reg);
      }
}

static void _restore_regs(struct blizzard_reg_list *list, int cnt)
{
      int i;

      for (i = 0; i < cnt; i++, list++) {
            int reg;
            for (reg = list->start; reg <= list->end; reg += 2)
                  blizzard_write_reg(reg, blizzard_reg_cache[reg / 2]);
      }
}

static void blizzard_save_all_regs(void)
{
      _save_regs(blizzard_pll_regs, ARRAY_SIZE(blizzard_pll_regs));
      _save_regs(blizzard_gen_regs, ARRAY_SIZE(blizzard_gen_regs));
}

static void blizzard_restore_pll_regs(void)
{
      _restore_regs(blizzard_pll_regs, ARRAY_SIZE(blizzard_pll_regs));
}

static void blizzard_restore_gen_regs(void)
{
      _restore_regs(blizzard_gen_regs, ARRAY_SIZE(blizzard_gen_regs));
}

static void blizzard_suspend(void)
{
      u32 l;
      unsigned long tmo;

      if (blizzard.last_color_mode) {
            update_full_screen();
            blizzard_sync();
      }
      blizzard.update_mode_before_suspend = blizzard.update_mode;
      /* the following will disable clocks as well */
      blizzard_set_update_mode(OMAPFB_UPDATE_DISABLED);

      blizzard_save_all_regs();

      blizzard_stop_sdram();

      l = blizzard_read_reg(BLIZZARD_POWER_SAVE);
      /* Standby, Sleep. We assume we use an external clock. */
      l |= 0x03;
      blizzard_write_reg(BLIZZARD_POWER_SAVE, l);

      tmo = jiffies + msecs_to_jiffies(100);
      while (!(blizzard_read_reg(BLIZZARD_PLL_MODE) & (1 << 1))) {
            if (time_after(jiffies, tmo)) {
                  dev_err(blizzard.fbdev->dev,
                        "s1d1374x: sleep timeout, stopping PLL manually\n");
                  l = blizzard_read_reg(BLIZZARD_PLL_MODE);
                  l &= ~0x03;
                  /* Disable PLL, counter function */
                  l |= 0x2;
                  blizzard_write_reg(BLIZZARD_PLL_MODE, l);
                  break;
            }
            msleep(1);
      }

      if (blizzard.power_down != NULL)
            blizzard.power_down(blizzard.fbdev->dev);
}

static void blizzard_resume(void)
{
      u32 l;

      if (blizzard.power_up != NULL)
            blizzard.power_up(blizzard.fbdev->dev);

      l = blizzard_read_reg(BLIZZARD_POWER_SAVE);
      /* Standby, Sleep */
      l &= ~0x03;
      blizzard_write_reg(BLIZZARD_POWER_SAVE, l);

      blizzard_restore_pll_regs();
      l = blizzard_read_reg(BLIZZARD_PLL_MODE);
      l &= ~0x03;
      /* Enable PLL, counter function */
      l |= 0x1;
      blizzard_write_reg(BLIZZARD_PLL_MODE, l);

      while (!(blizzard_read_reg(BLIZZARD_PLL_DIV) & (1 << 7)))
            msleep(1);

      blizzard_restart_sdram();

      blizzard_restore_gen_regs();

      /* Enable display */
      blizzard_write_reg(BLIZZARD_DISPLAY_MODE, 0x01);

      /* the following will enable clocks as necessary */
      blizzard_set_update_mode(blizzard.update_mode_before_suspend);

      /* Force a background update */
      blizzard.zoom_on = 1;
      update_full_screen();
      blizzard_sync();
}

static int blizzard_init(struct omapfb_device *fbdev, int ext_mode,
                   struct omapfb_mem_desc *req_vram)
{
      int r = 0, i;
      u8 rev, conf;
      unsigned long ext_clk;
      int extif_div;
      unsigned long sys_clk, pix_clk;
      struct omapfb_platform_data *omapfb_conf;
      struct blizzard_platform_data *ctrl_conf;

      blizzard.fbdev = fbdev;

      BUG_ON(!fbdev->ext_if || !fbdev->int_ctrl);

      blizzard.fbdev = fbdev;
      blizzard.extif = fbdev->ext_if;
      blizzard.int_ctrl = fbdev->int_ctrl;

      omapfb_conf = fbdev->dev->platform_data;
      ctrl_conf = omapfb_conf->ctrl_platform_data;
      if (ctrl_conf == NULL || ctrl_conf->get_clock_rate == NULL) {
            dev_err(fbdev->dev, "s1d1374x: missing platform data\n");
            r = -ENOENT;
            goto err1;
      }

      blizzard.power_down = ctrl_conf->power_down;
      blizzard.power_up = ctrl_conf->power_up;

      spin_lock_init(&blizzard.req_lock);

      if ((r = blizzard.int_ctrl->init(fbdev, 1, req_vram)) < 0)
            goto err1;

      if ((r = blizzard.extif->init(fbdev)) < 0)
            goto err2;

      blizzard_ctrl.set_color_key = blizzard.int_ctrl->set_color_key;
      blizzard_ctrl.get_color_key = blizzard.int_ctrl->get_color_key;
      blizzard_ctrl.setup_mem = blizzard.int_ctrl->setup_mem;
      blizzard_ctrl.mmap = blizzard.int_ctrl->mmap;

      ext_clk = ctrl_conf->get_clock_rate(fbdev->dev);
      if ((r = calc_extif_timings(ext_clk, &extif_div)) < 0)
            goto err3;

      set_extif_timings(&blizzard.reg_timings);

      if (blizzard.power_up != NULL)
            blizzard.power_up(fbdev->dev);

      calc_blizzard_clk_rates(ext_clk, &sys_clk, &pix_clk);

      if ((r = calc_extif_timings(sys_clk, &extif_div)) < 0)
            goto err3;
      set_extif_timings(&blizzard.reg_timings);

      if (!(blizzard_read_reg(BLIZZARD_PLL_DIV) & 0x80)) {
            dev_err(fbdev->dev,
                  "controller not initialized by the bootloader\n");
            r = -ENODEV;
            goto err3;
      }

      if (ctrl_conf->te_connected) {
            if ((r = setup_tearsync(pix_clk, extif_div)) < 0)
                  goto err3;
            blizzard.te_connected = 1;
      }

      rev = blizzard_read_reg(BLIZZARD_REV_CODE);
      conf = blizzard_read_reg(BLIZZARD_CONFIG);

      switch (rev & 0xfc) {
      case 0x9c:
            blizzard.version = BLIZZARD_VERSION_S1D13744;
            pr_info("omapfb: s1d13744 LCD controller rev %d "
                  "initialized (CNF pins %x)\n", rev & 0x03, conf & 0x07);
            break;
      case 0xa4:
            blizzard.version = BLIZZARD_VERSION_S1D13745;
            pr_info("omapfb: s1d13745 LCD controller rev %d "
                  "initialized (CNF pins %x)\n", rev & 0x03, conf & 0x07);
            break;
      default:
            dev_err(fbdev->dev, "invalid s1d1374x revision %02x\n",
                  rev);
            r = -ENODEV;
            goto err3;
      }

      blizzard.max_transmit_size = blizzard.extif->max_transmit_size;

      blizzard.update_mode = OMAPFB_UPDATE_DISABLED;

      blizzard.auto_update_window.x = 0;
      blizzard.auto_update_window.y = 0;
      blizzard.auto_update_window.width = fbdev->panel->x_res;
      blizzard.auto_update_window.height = fbdev->panel->y_res;
      blizzard.auto_update_window.out_x = 0;
      blizzard.auto_update_window.out_x = 0;
      blizzard.auto_update_window.out_width = fbdev->panel->x_res;
      blizzard.auto_update_window.out_height = fbdev->panel->y_res;
      blizzard.auto_update_window.format = 0;

      blizzard.screen_width = fbdev->panel->x_res;
      blizzard.screen_height = fbdev->panel->y_res;

      init_timer(&blizzard.auto_update_timer);
      blizzard.auto_update_timer.function = blizzard_update_window_auto;
      blizzard.auto_update_timer.data = 0;

      INIT_LIST_HEAD(&blizzard.free_req_list);
      INIT_LIST_HEAD(&blizzard.pending_req_list);
      for (i = 0; i < ARRAY_SIZE(blizzard.req_pool); i++)
            list_add(&blizzard.req_pool[i].entry, &blizzard.free_req_list);
      BUG_ON(i <= IRQ_REQ_POOL_SIZE);
      sema_init(&blizzard.req_sema, i - IRQ_REQ_POOL_SIZE);

      return 0;
err3:
      if (blizzard.power_down != NULL)
            blizzard.power_down(fbdev->dev);
      blizzard.extif->cleanup();
err2:
      blizzard.int_ctrl->cleanup();
err1:
      return r;
}

static void blizzard_cleanup(void)
{
      blizzard_set_update_mode(OMAPFB_UPDATE_DISABLED);
      blizzard.extif->cleanup();
      blizzard.int_ctrl->cleanup();
      if (blizzard.power_down != NULL)
            blizzard.power_down(blizzard.fbdev->dev);
}

struct lcd_ctrl blizzard_ctrl = {
      .name             = "blizzard",
      .init             = blizzard_init,
      .cleanup          = blizzard_cleanup,
      .bind_client            = blizzard_bind_client,
      .get_caps         = blizzard_get_caps,
      .set_update_mode  = blizzard_set_update_mode,
      .get_update_mode  = blizzard_get_update_mode,
      .setup_plane            = blizzard_setup_plane,
      .set_scale        = blizzard_set_scale,
      .enable_plane           = blizzard_enable_plane,
      .update_window          = blizzard_update_window_async,
      .sync             = blizzard_sync,
      .suspend          = blizzard_suspend,
      .resume                 = blizzard_resume,
};


Generated by  Doxygen 1.6.0   Back to index