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sticore.c

/*
 *  linux/drivers/video/console/sticore.c -
 *    core code for console driver using HP's STI firmware
 *
 *    Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
 *    Copyright (C) 2001-2003 Helge Deller <deller@gmx.de>
 *    Copyright (C) 2001-2002 Thomas Bogendoerfer <tsbogend@alpha.franken.de>
 * 
 * TODO:
 * - call STI in virtual mode rather than in real mode
 * - screen blanking with state_mgmt() in text mode STI ? 
 * - try to make it work on m68k hp workstations ;)
 * 
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/font.h>

#include <asm/hardware.h>
#include <asm/parisc-device.h>
#include <asm/cacheflush.h>

#include "../sticore.h"

#define STI_DRIVERVERSION "Version 0.9a"

struct sti_struct *default_sti __read_mostly;

/* number of STI ROMS found and their ptrs to each struct */
static int num_sti_roms __read_mostly;
static struct sti_struct *sti_roms[MAX_STI_ROMS] __read_mostly;


/* The colour indices used by STI are
 *   0 - Black
 *   1 - White
 *   2 - Red
 *   3 - Yellow/Brown
 *   4 - Green
 *   5 - Cyan
 *   6 - Blue
 *   7 - Magenta
 *
 * So we have the same colours as VGA (basically one bit each for R, G, B),
 * but have to translate them, anyway. */

static const u8 col_trans[8] = {
        0, 6, 4, 5,
        2, 7, 3, 1
};

#define c_fg(sti, c) col_trans[((c>> 8) & 7)]
#define c_bg(sti, c) col_trans[((c>>11) & 7)]
#define c_index(sti, c) ((c) & 0xff)

static const struct sti_init_flags default_init_flags = {
      .wait = STI_WAIT, 
      .reset      = 1,
      .text = 1, 
      .nontext = 1,
      .no_chg_bet = 1, 
      .no_chg_bei = 1, 
      .init_cmap_tx = 1,
};

int
sti_init_graph(struct sti_struct *sti) 
{
      struct sti_init_inptr_ext inptr_ext = { 0, };
      struct sti_init_inptr inptr = {
            .text_planes      = 3, /* # of text planes (max 3 for STI) */
            .ext_ptr    = STI_PTR(&inptr_ext)
      };
      struct sti_init_outptr outptr = { 0, };
      unsigned long flags;
      int ret;

      spin_lock_irqsave(&sti->lock, flags);

      ret = STI_CALL(sti->init_graph, &default_init_flags, &inptr,
            &outptr, sti->glob_cfg);

      spin_unlock_irqrestore(&sti->lock, flags);

      if (ret < 0) {
            printk(KERN_ERR "STI init_graph failed (ret %d, errno %d)\n",ret,outptr.errno);
            return -1;
      }
      
      sti->text_planes = outptr.text_planes;
      return 0;
}

static const struct sti_conf_flags default_conf_flags = {
      .wait = STI_WAIT,
};

void
sti_inq_conf(struct sti_struct *sti)
{
      struct sti_conf_inptr inptr = { 0, };
      unsigned long flags;
      s32 ret;

      sti->outptr.ext_ptr = STI_PTR(&sti->outptr_ext);
      
      do {
            spin_lock_irqsave(&sti->lock, flags);
            ret = STI_CALL(sti->inq_conf, &default_conf_flags,
                  &inptr, &sti->outptr, sti->glob_cfg);
            spin_unlock_irqrestore(&sti->lock, flags);
      } while (ret == 1);
}

static const struct sti_font_flags default_font_flags = {
      .wait       = STI_WAIT,
      .non_text   = 0,
};

void
sti_putc(struct sti_struct *sti, int c, int y, int x)
{
      struct sti_font_inptr inptr = {
            .font_start_addr= STI_PTR(sti->font->raw),
            .index            = c_index(sti, c),
            .fg_color   = c_fg(sti, c),
            .bg_color   = c_bg(sti, c),
            .dest_x           = x * sti->font_width,
            .dest_y           = y * sti->font_height,
      };
      struct sti_font_outptr outptr = { 0, };
      s32 ret;
      unsigned long flags;

      do {
            spin_lock_irqsave(&sti->lock, flags);
            ret = STI_CALL(sti->font_unpmv, &default_font_flags,
                  &inptr, &outptr, sti->glob_cfg);
            spin_unlock_irqrestore(&sti->lock, flags);
      } while (ret == 1);
}

static const struct sti_blkmv_flags clear_blkmv_flags = {
      .wait = STI_WAIT, 
      .color      = 1, 
      .clear      = 1, 
};

void
sti_set(struct sti_struct *sti, int src_y, int src_x,
      int height, int width, u8 color)
{
      struct sti_blkmv_inptr inptr = {
            .fg_color   = color,
            .bg_color   = color,
            .src_x            = src_x,
            .src_y            = src_y,
            .dest_x           = src_x,
            .dest_y           = src_y,
            .width            = width,
            .height           = height,
      };
      struct sti_blkmv_outptr outptr = { 0, };
      s32 ret;
      unsigned long flags;
      
      do {
            spin_lock_irqsave(&sti->lock, flags);
            ret = STI_CALL(sti->block_move, &clear_blkmv_flags,
                  &inptr, &outptr, sti->glob_cfg);
            spin_unlock_irqrestore(&sti->lock, flags);
      } while (ret == 1);
}

void
sti_clear(struct sti_struct *sti, int src_y, int src_x,
        int height, int width, int c)
{
      struct sti_blkmv_inptr inptr = {
            .fg_color   = c_fg(sti, c),
            .bg_color   = c_bg(sti, c),
            .src_x            = src_x * sti->font_width,
            .src_y            = src_y * sti->font_height,
            .dest_x           = src_x * sti->font_width,
            .dest_y           = src_y * sti->font_height,
            .width            = width * sti->font_width,
            .height           = height* sti->font_height,
      };
      struct sti_blkmv_outptr outptr = { 0, };
      s32 ret;
      unsigned long flags;

      do {
            spin_lock_irqsave(&sti->lock, flags);
            ret = STI_CALL(sti->block_move, &clear_blkmv_flags,
                  &inptr, &outptr, sti->glob_cfg);
            spin_unlock_irqrestore(&sti->lock, flags);
      } while (ret == 1);
}

static const struct sti_blkmv_flags default_blkmv_flags = {
      .wait = STI_WAIT, 
};

void
sti_bmove(struct sti_struct *sti, int src_y, int src_x,
        int dst_y, int dst_x, int height, int width)
{
      struct sti_blkmv_inptr inptr = {
            .src_x            = src_x * sti->font_width,
            .src_y            = src_y * sti->font_height,
            .dest_x           = dst_x * sti->font_width,
            .dest_y           = dst_y * sti->font_height,
            .width            = width * sti->font_width,
            .height           = height* sti->font_height,
      };
      struct sti_blkmv_outptr outptr = { 0, };
      s32 ret;
      unsigned long flags;

      do {
            spin_lock_irqsave(&sti->lock, flags);
            ret = STI_CALL(sti->block_move, &default_blkmv_flags,
                  &inptr, &outptr, sti->glob_cfg);
            spin_unlock_irqrestore(&sti->lock, flags);
      } while (ret == 1);
}


static void sti_flush(unsigned long start, unsigned long end)
{
      flush_icache_range(start, end);
}

void __devinit
sti_rom_copy(unsigned long base, unsigned long count, void *dest)
{
      unsigned long dest_start = (unsigned long) dest;

      /* this still needs to be revisited (see arch/parisc/mm/init.c:246) ! */
      while (count >= 4) {
            count -= 4;
            *(u32 *)dest = gsc_readl(base);
            base += 4;
            dest += 4;
      }
      while (count) {
            count--;
            *(u8 *)dest = gsc_readb(base);
            base++;
            dest++;
      }

      sti_flush(dest_start, (unsigned long)dest);
}




static char default_sti_path[21] __read_mostly;

#ifndef MODULE
static int __devinit sti_setup(char *str)
{
      if (str)
            strlcpy (default_sti_path, str, sizeof (default_sti_path));
      
      return 1;
}

/*    Assuming the machine has multiple STI consoles (=graphic cards) which
 *    all get detected by sticon, the user may define with the linux kernel
 *    parameter sti=<x> which of them will be the initial boot-console.
 *    <x> is a number between 0 and MAX_STI_ROMS, with 0 as the default 
 *    STI screen.
 */
__setup("sti=", sti_setup);
#endif



static char __devinitdata     *font_name[MAX_STI_ROMS] = { "VGA8x16", };
static int __devinitdata      font_index[MAX_STI_ROMS],
                        font_height[MAX_STI_ROMS],
                        font_width[MAX_STI_ROMS];
#ifndef MODULE
static int __devinit sti_font_setup(char *str)
{
      char *x;
      int i = 0;

      /* we accept sti_font=VGA8x16, sti_font=10x20, sti_font=10*20 
       * or sti_font=7 style command lines. */

      while (i<MAX_STI_ROMS && str && *str) {
            if (*str>='0' && *str<='9') {
                  if ((x = strchr(str, 'x')) || (x = strchr(str, '*'))) {
                        font_height[i] = simple_strtoul(str, NULL, 0);
                        font_width[i] = simple_strtoul(x+1, NULL, 0);
                  } else {
                        font_index[i] = simple_strtoul(str, NULL, 0);
                  }
            } else {
                  font_name[i] = str;     /* fb font name */
            }

            if ((x = strchr(str, ',')))
                  *x++ = 0;
            str = x;

            i++;
      }

      return 1;
}

/*    The optional linux kernel parameter "sti_font" defines which font
 *    should be used by the sticon driver to draw characters to the screen.
 *    Possible values are:
 *    - sti_font=<fb_fontname>:
 *          <fb_fontname> is the name of one of the linux-kernel built-in 
 *          framebuffer font names (e.g. VGA8x16, SUN22x18). 
 *          This is only available if the fonts have been statically compiled 
 *          in with e.g. the CONFIG_FONT_8x16 or CONFIG_FONT_SUN12x22 options.
 *    - sti_font=<number>
 *          most STI ROMs have built-in HP specific fonts, which can be selected
 *          by giving the desired number to the sticon driver. 
 *          NOTE: This number is machine and STI ROM dependend.
 *    - sti_font=<height>x<width>  (e.g. sti_font=16x8)
 *          <height> and <width> gives hints to the height and width of the
 *          font which the user wants. The sticon driver will try to use
 *          a font with this height and width, but if no suitable font is
 *          found, sticon will use the default 8x8 font.
 */
__setup("sti_font=", sti_font_setup);
#endif


      
static void __devinit
sti_dump_globcfg(struct sti_glob_cfg *glob_cfg, unsigned int sti_mem_request)
{
      struct sti_glob_cfg_ext *cfg;
      
      DPRINTK((KERN_INFO
            "%d text planes\n"
            "%4d x %4d screen resolution\n"
            "%4d x %4d offscreen\n"
            "%4d x %4d layout\n"
            "regions at %08x %08x %08x %08x\n"
            "regions at %08x %08x %08x %08x\n"
            "reent_lvl %d\n"
            "save_addr %08x\n",
            glob_cfg->text_planes,
            glob_cfg->onscreen_x, glob_cfg->onscreen_y,
            glob_cfg->offscreen_x, glob_cfg->offscreen_y,
            glob_cfg->total_x, glob_cfg->total_y,
            glob_cfg->region_ptrs[0], glob_cfg->region_ptrs[1],
            glob_cfg->region_ptrs[2], glob_cfg->region_ptrs[3],
            glob_cfg->region_ptrs[4], glob_cfg->region_ptrs[5],
            glob_cfg->region_ptrs[6], glob_cfg->region_ptrs[7],
            glob_cfg->reent_lvl,
            glob_cfg->save_addr));

      /* dump extended cfg */ 
      cfg = PTR_STI((unsigned long)glob_cfg->ext_ptr);
      DPRINTK(( KERN_INFO
            "monitor %d\n"
            "in friendly mode: %d\n"
            "power consumption %d watts\n"
            "freq ref %d\n"
            "sti_mem_addr %08x (size=%d bytes)\n",
            cfg->curr_mon,
            cfg->friendly_boot,
            cfg->power,
            cfg->freq_ref,
            cfg->sti_mem_addr, sti_mem_request));
}

static void __devinit
sti_dump_outptr(struct sti_struct *sti)
{
      DPRINTK((KERN_INFO
            "%d bits per pixel\n"
            "%d used bits\n"
            "%d planes\n"
            "attributes %08x\n",
             sti->outptr.bits_per_pixel,
             sti->outptr.bits_used,
             sti->outptr.planes,
             sti->outptr.attributes));
}

static int __devinit
sti_init_glob_cfg(struct sti_struct *sti,
          unsigned long rom_address, unsigned long hpa)
{
      struct sti_glob_cfg *glob_cfg;
      struct sti_glob_cfg_ext *glob_cfg_ext;
      void *save_addr;
      void *sti_mem_addr;
      const int save_addr_size = 1024;    /* XXX */
      int i;

      if (!sti->sti_mem_request)
            sti->sti_mem_request = 256; /* STI default */

      glob_cfg = kzalloc(sizeof(*sti->glob_cfg), GFP_KERNEL);
      glob_cfg_ext = kzalloc(sizeof(*glob_cfg_ext), GFP_KERNEL);
      save_addr = kzalloc(save_addr_size, GFP_KERNEL);
      sti_mem_addr = kzalloc(sti->sti_mem_request, GFP_KERNEL);

      if (!(glob_cfg && glob_cfg_ext && save_addr && sti_mem_addr)) {
            kfree(glob_cfg);
            kfree(glob_cfg_ext);
            kfree(save_addr);
            kfree(sti_mem_addr);
            return -ENOMEM;
      }

      glob_cfg->ext_ptr = STI_PTR(glob_cfg_ext);
      glob_cfg->save_addr = STI_PTR(save_addr);
      for (i=0; i<8; i++) {
            unsigned long newhpa, len;
             
            if (sti->pd) {
                  unsigned char offs = sti->rm_entry[i];
                        
                  if (offs == 0)
                        continue;
                  if (offs != PCI_ROM_ADDRESS &&
                      (offs < PCI_BASE_ADDRESS_0 ||
                       offs > PCI_BASE_ADDRESS_5)) {
                        printk (KERN_WARNING
                              "STI pci region maping for region %d (%02x) can't be mapped\n",
                              i,sti->rm_entry[i]);
                        continue;
                  }
                  newhpa = pci_resource_start (sti->pd, (offs - PCI_BASE_ADDRESS_0) / 4);
            } else
                  newhpa = (i == 0) ? rom_address : hpa;

            sti->regions_phys[i] =
                  REGION_OFFSET_TO_PHYS(sti->regions[i], newhpa);
            
            len = sti->regions[i].region_desc.length * 4096;
            if (len)
                  glob_cfg->region_ptrs[i] = sti->regions_phys[i];
            
            DPRINTK(("region #%d: phys %08lx, region_ptr %08x, len=%lukB, "
                   "btlb=%d, sysonly=%d, cache=%d, last=%d\n",
                  i, sti->regions_phys[i], glob_cfg->region_ptrs[i],
                  len/1024,
                  sti->regions[i].region_desc.btlb,
                  sti->regions[i].region_desc.sys_only,
                  sti->regions[i].region_desc.cache, 
                  sti->regions[i].region_desc.last));

            /* last entry reached ? */
            if (sti->regions[i].region_desc.last)
                  break;
      }

      if (++i<8 && sti->regions[i].region)
            printk(KERN_WARNING "%s: *future ptr (0x%8x) not yet supported !\n",
                        __FILE__, sti->regions[i].region);

      glob_cfg_ext->sti_mem_addr = STI_PTR(sti_mem_addr);

      sti->glob_cfg = glob_cfg;
      
      return 0;
}

#ifdef CONFIG_FB
struct sti_cooked_font * __devinit
sti_select_fbfont(struct sti_cooked_rom *cooked_rom, const char *fbfont_name)
{
      const struct font_desc *fbfont;
      unsigned int size, bpc;
      void *dest;
      struct sti_rom_font *nf;
      struct sti_cooked_font *cooked_font;
      
      if (!fbfont_name || !strlen(fbfont_name))
            return NULL;
      fbfont = find_font(fbfont_name);
      if (!fbfont)
            fbfont = get_default_font(1024,768, ~(u32)0, ~(u32)0);
      if (!fbfont)
            return NULL;

      DPRINTK((KERN_DEBUG "selected %dx%d fb-font %s\n",
                  fbfont->width, fbfont->height, fbfont->name));
                  
      bpc = ((fbfont->width+7)/8) * fbfont->height; 
      size = bpc * 256;
      size += sizeof(struct sti_rom_font);

      nf = kzalloc(size, GFP_KERNEL);
      if (!nf)
            return NULL;

      nf->first_char = 0;
      nf->last_char = 255;
      nf->width = fbfont->width;
      nf->height = fbfont->height;
      nf->font_type = STI_FONT_HPROMAN8;
      nf->bytes_per_char = bpc;
      nf->next_font = 0;
      nf->underline_height = 1;
      nf->underline_pos = fbfont->height - nf->underline_height;

      dest = nf;
      dest += sizeof(struct sti_rom_font);
      memcpy(dest, fbfont->data, bpc*256);

      cooked_font = kzalloc(sizeof(*cooked_font), GFP_KERNEL);
      if (!cooked_font) {
            kfree(nf);
            return NULL;
      }
      
      cooked_font->raw = nf;
      cooked_font->next_font = NULL;

      cooked_rom->font_start = cooked_font;

      return cooked_font;
}
#else
struct sti_cooked_font * __devinit
sti_select_fbfont(struct sti_cooked_rom *cooked_rom, const char *fbfont_name)
{
      return NULL;
}
#endif

struct sti_cooked_font * __devinit
sti_select_font(struct sti_cooked_rom *rom,
          int (*search_font_fnc) (struct sti_cooked_rom *,int,int) )
{
      struct sti_cooked_font *font;
      int i;
      int index = num_sti_roms;

      /* check for framebuffer-font first */
      if ((font = sti_select_fbfont(rom, font_name[index])))
            return font;

      if (font_width[index] && font_height[index])
            font_index[index] = search_font_fnc(rom, 
                        font_height[index], font_width[index]);

      for (font = rom->font_start, i = font_index[index];
          font && (i > 0);
          font = font->next_font, i--);

      if (font)
            return font;
      else
            return rom->font_start;
}


static void __devinit
sti_dump_rom(struct sti_rom *rom)
{
      printk(KERN_INFO "    id %04x-%04x, conforms to spec rev. %d.%02x\n",
            rom->graphics_id[0], 
            rom->graphics_id[1],
            rom->revno[0] >> 4, 
            rom->revno[0] & 0x0f);
      DPRINTK(("      supports %d monitors\n", rom->num_mons));
      DPRINTK(("      font start %08x\n", rom->font_start));
      DPRINTK(("      region list %08x\n", rom->region_list));
      DPRINTK(("      init_graph %08x\n", rom->init_graph));
      DPRINTK(("      bus support %02x\n", rom->bus_support));
      DPRINTK(("      ext bus support %02x\n", rom->ext_bus_support));
      DPRINTK(("      alternate code type %d\n", rom->alt_code_type));
}


static int __devinit
sti_cook_fonts(struct sti_cooked_rom *cooked_rom,
                  struct sti_rom *raw_rom)
{
      struct sti_rom_font *raw_font, *font_start;
      struct sti_cooked_font *cooked_font;
      
      cooked_font = kzalloc(sizeof(*cooked_font), GFP_KERNEL);
      if (!cooked_font)
            return 0;

      cooked_rom->font_start = cooked_font;

      raw_font = ((void *)raw_rom) + (raw_rom->font_start);

      font_start = raw_font;
      cooked_font->raw = raw_font;

      while (raw_font->next_font) {
            raw_font = ((void *)font_start) + (raw_font->next_font);

            cooked_font->next_font = kzalloc(sizeof(*cooked_font), GFP_KERNEL);
            if (!cooked_font->next_font)
                  return 1;

            cooked_font = cooked_font->next_font;

            cooked_font->raw = raw_font;
      }

      cooked_font->next_font = NULL;
      return 1;
}


static int __devinit
sti_search_font(struct sti_cooked_rom *rom, int height, int width)
{
      struct sti_cooked_font *font;
      int i = 0;
      
      for (font = rom->font_start; font; font = font->next_font, i++) {
            if ((font->raw->width == width) &&
                (font->raw->height == height))
                  return i;
      }
      return 0;
}

#define BMODE_RELOCATE(offset)            offset = (offset) / 4;
#define BMODE_LAST_ADDR_OFFS        0x50

static void * __devinit
sti_bmode_font_raw(struct sti_cooked_font *f)
{
      unsigned char *n, *p, *q;
      int size = f->raw->bytes_per_char*256+sizeof(struct sti_rom_font);
      
      n = kzalloc (4*size, GFP_KERNEL);
      if (!n)
            return NULL;
      p = n + 3;
      q = (unsigned char *)f->raw;
      while (size--) {
            *p = *q++;
            p+=4;
      }
      return n + 3;
}

static void __devinit
sti_bmode_rom_copy(unsigned long base, unsigned long count, void *dest)
{
      unsigned long dest_start = (unsigned long) dest;

      while (count) {
            count--;
            *(u8 *)dest = gsc_readl(base);
            base += 4;
            dest++;
      }

      sti_flush(dest_start, (unsigned long)dest);
}

static struct sti_rom * __devinit
sti_get_bmode_rom (unsigned long address)
{
      struct sti_rom *raw;
      u32 size;
      struct sti_rom_font *raw_font, *font_start;

      sti_bmode_rom_copy(address + BMODE_LAST_ADDR_OFFS, sizeof(size), &size);

      size = (size+3) / 4;
      raw = kmalloc(size, GFP_KERNEL);
      if (raw) {
            sti_bmode_rom_copy(address, size, raw);
            memmove (&raw->res004, &raw->type[0], 0x3c);
            raw->type[3] = raw->res004;

            BMODE_RELOCATE (raw->region_list);
            BMODE_RELOCATE (raw->font_start);

            BMODE_RELOCATE (raw->init_graph);
            BMODE_RELOCATE (raw->state_mgmt);
            BMODE_RELOCATE (raw->font_unpmv);
            BMODE_RELOCATE (raw->block_move);
            BMODE_RELOCATE (raw->inq_conf);

            raw_font = ((void *)raw) + raw->font_start;
            font_start = raw_font;
            
            while (raw_font->next_font) {
                  BMODE_RELOCATE (raw_font->next_font);
                  raw_font = ((void *)font_start) + raw_font->next_font;
            }
      }
      return raw;
}

struct sti_rom * __devinit
sti_get_wmode_rom (unsigned long address)
{
      struct sti_rom *raw;
      unsigned long size;

      /* read the ROM size directly from the struct in ROM */ 
      size = gsc_readl(address + offsetof(struct sti_rom,last_addr));

      raw = kmalloc(size, GFP_KERNEL);
      if (raw)
            sti_rom_copy(address, size, raw);

      return raw;
}

int __devinit
sti_read_rom(int wordmode, struct sti_struct *sti, unsigned long address)
{
      struct sti_cooked_rom *cooked;
      struct sti_rom *raw = NULL;

      cooked = kmalloc(sizeof *cooked, GFP_KERNEL);
      if (!cooked)
            goto out_err;

      if (wordmode)
            raw = sti_get_wmode_rom (address);
      else
            raw = sti_get_bmode_rom (address);

      if (!raw)
            goto out_err;

      if (!sti_cook_fonts(cooked, raw)) {
            printk(KERN_ERR "No font found for STI at %08lx\n", address);
            goto out_err;
      }

      if (raw->region_list)
            memcpy(sti->regions, ((void *)raw)+raw->region_list, sizeof(sti->regions));

      address = (unsigned long) STI_PTR(raw);

      sti->font_unpmv = address + (raw->font_unpmv & 0x03ffffff);
      sti->block_move = address + (raw->block_move & 0x03ffffff);
      sti->init_graph = address + (raw->init_graph & 0x03ffffff);
      sti->inq_conf   = address + (raw->inq_conf   & 0x03ffffff);

      sti->rom = cooked;
      sti->rom->raw = raw;
      
      sti->font = sti_select_font(sti->rom, sti_search_font);
      sti->font_width = sti->font->raw->width;
      sti->font_height = sti->font->raw->height;
      if (!wordmode)
            sti->font->raw = sti_bmode_font_raw(sti->font);

      sti->sti_mem_request = raw->sti_mem_req;
      sti->graphics_id[0] = raw->graphics_id[0];
      sti->graphics_id[1] = raw->graphics_id[1];
      
      sti_dump_rom(raw);
      
      return 1;

out_err:
      kfree(raw);
      kfree(cooked);
      return 0;
}

static struct sti_struct * __devinit
sti_try_rom_generic(unsigned long address, unsigned long hpa, struct pci_dev *pd)
{
      struct sti_struct *sti;
      int ok;
      u32 sig;

      if (num_sti_roms >= MAX_STI_ROMS) {
            printk(KERN_WARNING "maximum number of STI ROMS reached !\n");
            return NULL;
      }
      
      sti = kzalloc(sizeof(*sti), GFP_KERNEL);
      if (!sti) {
            printk(KERN_ERR "Not enough memory !\n");
            return NULL;
      }

      spin_lock_init(&sti->lock);

test_rom:
      /* if we can't read the ROM, bail out early.  Not being able
       * to read the hpa is okay, for romless sti */
      if (pdc_add_valid(address))
            goto out_err;

      sig = gsc_readl(address);

      /* check for a PCI ROM structure */
      if ((le32_to_cpu(sig)==0xaa55)) {
            unsigned int i, rm_offset;
            u32 *rm;
            i = gsc_readl(address+0x04);
            if (i != 1) {
                  /* The ROM could have multiple architecture 
                   * dependent images (e.g. i386, parisc,...) */
                  printk(KERN_WARNING 
                        "PCI ROM is not a STI ROM type image (0x%8x)\n", i);
                  goto out_err;
            }
            
            sti->pd = pd;

            i = gsc_readl(address+0x0c);
            DPRINTK(("PCI ROM size (from header) = %d kB\n",
                  le16_to_cpu(i>>16)*512/1024));
            rm_offset = le16_to_cpu(i & 0xffff);
            if (rm_offset) { 
                  /* read 16 bytes from the pci region mapper array */
                  rm = (u32*) &sti->rm_entry;
                  *rm++ = gsc_readl(address+rm_offset+0x00);
                  *rm++ = gsc_readl(address+rm_offset+0x04);
                  *rm++ = gsc_readl(address+rm_offset+0x08);
                  *rm++ = gsc_readl(address+rm_offset+0x0c);
                  DPRINTK(("PCI region Mapper offset = %08x: ",
                        rm_offset));
                  for (i=0; i<16; i++)
                        DPRINTK(("%02x ", sti->rm_entry[i]));
                  DPRINTK(("\n"));
            }

            address += le32_to_cpu(gsc_readl(address+8));
            DPRINTK(("sig %04x, PCI STI ROM at %08lx\n", sig, address));
            goto test_rom;
      }
      
      ok = 0;
      
      if ((sig & 0xff) == 0x01) {
            DPRINTK(("    byte mode ROM at %08lx, hpa at %08lx\n",
                   address, hpa));
            ok = sti_read_rom(0, sti, address);
      }

      if ((sig & 0xffff) == 0x0303) {
            DPRINTK(("    word mode ROM at %08lx, hpa at %08lx\n",
                   address, hpa));
            ok = sti_read_rom(1, sti, address);
      }

      if (!ok)
            goto out_err;

      if (sti_init_glob_cfg(sti, address, hpa))
            goto out_err; /* not enough memory */

      /* disable STI PCI ROM. ROM and card RAM overlap and
       * leaving it enabled would force HPMCs
       */
      if (sti->pd) {
            unsigned long rom_base;
            rom_base = pci_resource_start(sti->pd, PCI_ROM_RESOURCE);   
            pci_write_config_dword(sti->pd, PCI_ROM_ADDRESS, rom_base & ~PCI_ROM_ADDRESS_ENABLE);
            DPRINTK((KERN_DEBUG "STI PCI ROM disabled\n"));
      }

      if (sti_init_graph(sti))
            goto out_err;

      sti_inq_conf(sti);
      sti_dump_globcfg(sti->glob_cfg, sti->sti_mem_request);
      sti_dump_outptr(sti);
      
      printk(KERN_INFO "    graphics card name: %s\n", sti->outptr.dev_name );

      sti_roms[num_sti_roms] = sti;
      num_sti_roms++;
      
      return sti;

out_err:
      kfree(sti);
      return NULL;
}

static void __devinit sticore_check_for_default_sti(struct sti_struct *sti, char *path)
{
      if (strcmp (path, default_sti_path) == 0)
            default_sti = sti;
}

/*
 * on newer systems PDC gives the address of the ROM 
 * in the additional address field addr[1] while on
 * older Systems the PDC stores it in page0->proc_sti 
 */
static int __devinit sticore_pa_init(struct parisc_device *dev)
{
      char pa_path[21];
      struct sti_struct *sti = NULL;
      int hpa = dev->hpa.start;

      if (dev->num_addrs && dev->addr[0])
            sti = sti_try_rom_generic(dev->addr[0], hpa, NULL);
      if (!sti)
            sti = sti_try_rom_generic(hpa, hpa, NULL);
      if (!sti)
            sti = sti_try_rom_generic(PAGE0->proc_sti, hpa, NULL);
      if (!sti)
            return 1;

      print_pa_hwpath(dev, pa_path);
      sticore_check_for_default_sti(sti, pa_path);
      return 0;
}


static int __devinit sticore_pci_init(struct pci_dev *pd,
            const struct pci_device_id *ent)
{
#ifdef CONFIG_PCI
      unsigned long fb_base, rom_base;
      unsigned int fb_len, rom_len;
      struct sti_struct *sti;
      
      pci_enable_device(pd);

      fb_base = pci_resource_start(pd, 0);
      fb_len = pci_resource_len(pd, 0);
      rom_base = pci_resource_start(pd, PCI_ROM_RESOURCE);
      rom_len = pci_resource_len(pd, PCI_ROM_RESOURCE);
      if (rom_base) {
            pci_write_config_dword(pd, PCI_ROM_ADDRESS, rom_base | PCI_ROM_ADDRESS_ENABLE);
            DPRINTK((KERN_DEBUG "STI PCI ROM enabled at 0x%08lx\n", rom_base));
      }

      printk(KERN_INFO "STI PCI graphic ROM found at %08lx (%u kB), fb at %08lx (%u MB)\n",
            rom_base, rom_len/1024, fb_base, fb_len/1024/1024);

      DPRINTK((KERN_DEBUG "Trying PCI STI ROM at %08lx, PCI hpa at %08lx\n",
                rom_base, fb_base));

      sti = sti_try_rom_generic(rom_base, fb_base, pd);
      if (sti) {
            char pa_path[30];
            print_pci_hwpath(pd, pa_path);
            sticore_check_for_default_sti(sti, pa_path);
      }
      
      if (!sti) {
            printk(KERN_WARNING "Unable to handle STI device '%s'\n",
                  pci_name(pd));
            return -ENODEV;
      }
#endif /* CONFIG_PCI */

      return 0;
}


static void __devexit sticore_pci_remove(struct pci_dev *pd)
{
      BUG();
}


static struct pci_device_id sti_pci_tbl[] = {
      { PCI_DEVICE(PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_VISUALIZE_EG) },
      { PCI_DEVICE(PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_VISUALIZE_FX6) },
      { PCI_DEVICE(PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_VISUALIZE_FX4) },
      { PCI_DEVICE(PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_VISUALIZE_FX2) },
      { PCI_DEVICE(PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_VISUALIZE_FXE) },
      { 0, } /* terminate list */
};
MODULE_DEVICE_TABLE(pci, sti_pci_tbl);

static struct pci_driver pci_sti_driver = {
      .name       = "sti",
      .id_table   = sti_pci_tbl,
      .probe            = sticore_pci_init,
      .remove           = sticore_pci_remove,
};

static struct parisc_device_id sti_pa_tbl[] = {
      { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00077 },
      { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00085 },
      { 0, }
};

static struct parisc_driver pa_sti_driver = {
      .name       = "sti",
      .id_table   = sti_pa_tbl,
      .probe            = sticore_pa_init,
};


/*
 * sti_init_roms() - detects all STI ROMs and stores them in sti_roms[]
 */

static int sticore_initialized __read_mostly;

static void __devinit sti_init_roms(void)
{
      if (sticore_initialized)
            return;

      sticore_initialized = 1;

      printk(KERN_INFO "STI GSC/PCI core graphics driver "
                  STI_DRIVERVERSION "\n");

      /* Register drivers for native & PCI cards */
      register_parisc_driver(&pa_sti_driver);
      pci_register_driver(&pci_sti_driver);

      /* if we didn't find the given default sti, take the first one */
      if (!default_sti)
            default_sti = sti_roms[0];

}

/*
 * index = 0 gives default sti
 * index > 0 gives other stis in detection order
 */
struct sti_struct * sti_get_rom(unsigned int index)
{
      if (!sticore_initialized)
            sti_init_roms();

      if (index == 0)
            return default_sti;

      if (index > num_sti_roms)
            return NULL;

      return sti_roms[index-1];
}
EXPORT_SYMBOL(sti_get_rom);

MODULE_AUTHOR("Philipp Rumpf, Helge Deller, Thomas Bogendoerfer");
MODULE_DESCRIPTION("Core STI driver for HP's NGLE series graphics cards in HP PARISC machines");
MODULE_LICENSE("GPL v2");


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