1 /*

     2  * Arm PrimeCell PL110 Color LCD Controller

     3  *

     4  * Copyright (c) 2005-2006 CodeSourcery.

     5  * Written by Paul Brook

     6  *

     7  * This code is licenced under the GNU LGPL

     8  */

     9 

    10 #include "hw.h"

    11 #include "primecell.h"

    12 #include "gui.h"

    13 

    14 #define PL110_CR_EN   0x001

    15 #define PL110_CR_BGR  0x100

    16 #define PL110_CR_BEBO 0x200

    17 #define PL110_CR_BEPO 0x400

    18 #define PL110_CR_PWR  0x800

    19 

    20 enum pl110_bppmode

    21 {

    22     BPP_1,

    23     BPP_2,

    24     BPP_4,

    25     BPP_8,

    26     BPP_16,

    27     BPP_32

    28 };

    29 

    30 typedef struct {

    31     DisplayState *ds;

    32 

    33     /* The Versatile/PB uses a slightly modified PL110 controller.  */

    34     int versatile;

    35     uint32_t timing[4];

    36     uint32_t cr;

    37     uint32_t upbase;

    38     uint32_t lpbase;

    39     uint32_t int_status;

    40     uint32_t int_mask;

    41     int cols;

    42     int rows;

    43     enum pl110_bppmode bpp;

    44     int invalidate;

    45     uint32_t pallette[256];

    46     uint32_t raw_pallette[128];

    47     qemu_irq irq;

    48 } pl110_state;

    49 

    50 static const unsigned char pl110_id[] =

    51 { 0x10, 0x11, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };

    52 

    53 /* The Arm documentation (DDI0224C) says the CLDC on the Versatile board

    54    has a different ID.  However Linux only looks for the normal ID.  */

    55 #if 0

    56 static const unsigned char pl110_versatile_id[] =

    57 { 0x93, 0x10, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };

    58 #else

    59 #define pl110_versatile_id pl110_id

    60 #endif

    61 

    62 static inline uint32_t rgb_to_pixel8(unsigned int r, unsigned int g, unsigned b)

    63 {

    64     return ((r >> 5) << 5) | ((g >> 5) << 2) | (b >> 6);

    65 }

    66 

    67 static inline uint32_t rgb_to_pixel15(unsigned int r, unsigned int g, unsigned b)

    68 {

    69     return ((r >> 3) << 10) | ((g >> 3) << 5) | (b >> 3);

    70 }

    71 

    72 static inline uint32_t rgb_to_pixel16(unsigned int r, unsigned int g, unsigned b)

    73 {

    74     return ((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3);

    75 }

    76 

    77 static inline uint32_t rgb_to_pixel24(unsigned int r, unsigned int g, unsigned b)

    78 {

    79     return (r << 16) | (g << 8) | b;

    80 }

    81 

    82 static inline uint32_t rgb_to_pixel32(unsigned int r, unsigned int g, unsigned b)

    83 {

    84     return (r << 16) | (g << 8) | b;

    85 }

    86 

    87 typedef void (*drawfn)(uint32_t *, uint8_t *, const uint8_t *, int);

    88 

    89 #define BITS 8

    90 #include "pl110_template.h"

    91 #define BITS 15

    92 #include "pl110_template.h"

    93 #define BITS 16

    94 #include "pl110_template.h"

    95 #define BITS 24

    96 #include "pl110_template.h"

    97 #define BITS 32

    98 #include "pl110_template.h"

    99 

   100 static int pl110_enabled(pl110_state *s)

   101 {

   102   return (s->cr & PL110_CR_EN) && (s->cr & PL110_CR_PWR);

   103 }

   104 

   105 static void pl110_update_display(void *opaque)

   106 {

   107     pl110_state *s = (pl110_state *)opaque;

   108     drawfn* fntable;

   109     drawfn fn;

   110     uint32_t *pallette;

   111     uint32_t addr;

   112     uint32_t base;

   113     int dest_width;

   114     int src_width;

   115     uint8_t *dest;

   116     uint8_t *src;

   117     int first, last = 0;

   118     int dirty, new_dirty;

   119     int i;

   120     int bpp_offset;

   121 

   122     if (!pl110_enabled(s))

   123         return;

   124 

   125     switch (ds_get_bits_per_pixel(s->ds)) {

   126     case 0:

   127         return;

   128     case 8:

   129         fntable = pl110_draw_fn_8;

   130         dest_width = 1;

   131         break;

   132     case 15:

   133         fntable = pl110_draw_fn_15;

   134         dest_width = 2;

   135         break;

   136     case 16:

   137         fntable = pl110_draw_fn_16;

   138         dest_width = 2;

   139         break;

   140     case 24:

   141         fntable = pl110_draw_fn_24;

   142         dest_width = 3;

   143         break;

   144     case 32:

   145         fntable = pl110_draw_fn_32;

   146         dest_width = 4;

   147         break;

   148     default:

   149         fprintf(stderr, "pl110: Bad color depth\n");

   150         exit(1);

   151     }

   152     if (s->cr & PL110_CR_BGR)

   153         bpp_offset = 0;

   154     else

   155         bpp_offset = 18;

   156 

   157     if (s->cr & PL110_CR_BEBO)

   158         fn = fntable[s->bpp + 6 + bpp_offset];

   159     else if (s->cr & PL110_CR_BEPO)

   160         fn = fntable[s->bpp + 12 + bpp_offset];

   161     else

   162         fn = fntable[s->bpp + bpp_offset];

   163 

   164     src_width = s->cols;

   165     switch (s->bpp) {

   166     case BPP_1:

   167         src_width >>= 3;

   168         break;

   169     case BPP_2:

   170         src_width >>= 2;

   171         break;

   172     case BPP_4:

   173         src_width >>= 1;

   174         break;

   175     case BPP_8:

   176         break;

   177     case BPP_16:

   178         src_width <<= 1;

   179         break;

   180     case BPP_32:

   181         src_width <<= 2;

   182         break;

   183     }

   184     dest_width *= s->cols;

   185     pallette = s->pallette;

   186     base = s->upbase;

   187     /* HACK: Arm aliases physical memory at 0x80000000.  */

   188     if (base > 0x80000000)

   189         base -= 0x80000000;

   190     /* FIXME: This is broken if it spans multiple regions.  */

   191     src = host_ram_addr(base);

   192     dest = ds_get_data(s->ds);

   193     first = -1;

   194     addr = base;

   195 

   196     dirty = cpu_physical_memory_get_dirty(addr, VGA_DIRTY_FLAG);

   197     new_dirty = dirty;

   198     for (i = 0; i < s->rows; i++) {

   199         if ((addr & ~TARGET_PAGE_MASK) + src_width >= TARGET_PAGE_SIZE) {

   200             uint32_t tmp;

   201             new_dirty = 0;

   202             for (tmp = 0; tmp < src_width; tmp += TARGET_PAGE_SIZE) {

   203                 new_dirty |= cpu_physical_memory_get_dirty(addr + tmp,

   204                                                            VGA_DIRTY_FLAG);

   205             }

   206         }

   207 

   208         if (dirty || new_dirty || s->invalidate) {

   209             fn(pallette, dest, src, s->cols);

   210             if (first == -1)

   211                 first = i;

   212             last = i;

   213         }

   214         dirty = new_dirty;

   215         addr += src_width;

   216         dest += dest_width;

   217         src += src_width;

   218     }

   219     if (first < 0)

   220       return;

   221 

   222     s->invalidate = 0;

   223     cpu_physical_memory_reset_dirty(base + first * src_width,

   224                                     base + (last + 1) * src_width,

   225                                     VGA_DIRTY_FLAG);

   226     dpy_update(s->ds, 0, first, s->cols, last - first + 1);

   227 }

   228 

   229 static void pl110_invalidate_display(void * opaque)

   230 {

   231     pl110_state *s = (pl110_state *)opaque;

   232     s->invalidate = 1;

   233 }

   234 

   235 static void pl110_update_pallette(pl110_state *s, int n)

   236 {

   237     int i;

   238     uint32_t raw;

   239     unsigned int r, g, b;

   240 

   241     raw = s->raw_pallette[n];

   242     n <<= 1;

   243     for (i = 0; i < 2; i++) {

   244         r = (raw & 0x1f) << 3;

   245         raw >>= 5;

   246         g = (raw & 0x1f) << 3;

   247         raw >>= 5;

   248         b = (raw & 0x1f) << 3;

   249         /* The I bit is ignored.  */

   250         raw >>= 6;

   251         switch (ds_get_bits_per_pixel(s->ds)) {

   252         case 8:

   253             s->pallette[n] = rgb_to_pixel8(r, g, b);

   254             break;

   255         case 15:

   256             s->pallette[n] = rgb_to_pixel15(r, g, b);

   257             break;

   258         case 16:

   259             s->pallette[n] = rgb_to_pixel16(r, g, b);

   260             break;

   261         case 24:

   262         case 32:

   263             s->pallette[n] = rgb_to_pixel32(r, g, b);

   264             break;

   265         }

   266         n++;

   267     }

   268 }

   269 

   270 static void pl110_resize(pl110_state *s, int width, int height)

   271 {

   272     if (width != s->cols || height != s->rows) {

   273         if (pl110_enabled(s)) {

   274             gui_resize_vt(s->ds, width, height);

   275         }

   276     }

   277     s->cols = width;

   278     s->rows = height;

   279 }

   280 

   281 /* Update interrupts.  */

   282 static void pl110_update(pl110_state *s)

   283 {

   284   /* TODO: Implement interrupts.  */

   285 }

   286 

   287 static uint32_t pl110_read(void *opaque, target_phys_addr_t offset)

   288 {

   289     pl110_state *s = (pl110_state *)opaque;

   290 

   291     if (offset >= 0xfe0 && offset < 0x1000) {

   292         if (s->versatile)

   293             return pl110_versatile_id[(offset - 0xfe0) >> 2];

   294         else

   295             return pl110_id[(offset - 0xfe0) >> 2];

   296     }

   297     if (offset >= 0x200 && offset < 0x400) {

   298         return s->raw_pallette[(offset - 0x200) >> 2];

   299     }

   300     switch (offset >> 2) {

   301     case 0: /* LCDTiming0 */

   302         return s->timing[0];

   303     case 1: /* LCDTiming1 */

   304         return s->timing[1];

   305     case 2: /* LCDTiming2 */

   306         return s->timing[2];

   307     case 3: /* LCDTiming3 */

   308         return s->timing[3];

   309     case 4: /* LCDUPBASE */

   310         return s->upbase;

   311     case 5: /* LCDLPBASE */

   312         return s->lpbase;

   313     case 6: /* LCDIMSC */

   314 	if (s->versatile)

   315 	  return s->cr;

   316         return s->int_mask;

   317     case 7: /* LCDControl */

   318 	if (s->versatile)

   319 	  return s->int_mask;

   320         return s->cr;

   321     case 8: /* LCDRIS */

   322         return s->int_status;

   323     case 9: /* LCDMIS */

   324         return s->int_status & s->int_mask;

   325     case 11: /* LCDUPCURR */

   326         /* TODO: Implement vertical refresh.  */

   327         return s->upbase;

   328     case 12: /* LCDLPCURR */

   329         return s->lpbase;

   330     default:

   331         cpu_abort (cpu_single_env, "pl110_read: Bad offset %x\n", (int)offset);

   332         return 0;

   333     }

   334 }

   335 

   336 static void pl110_write(void *opaque, target_phys_addr_t offset,

   337                         uint32_t val)

   338 {

   339     pl110_state *s = (pl110_state *)opaque;

   340     int n;

   341 

   342     /* For simplicity invalidate the display whenever a control register

   343        is writen to.  */

   344     s->invalidate = 1;

   345     if (offset >= 0x200 && offset < 0x400) {

   346         /* Pallette.  */

   347         n = (offset - 0x200) >> 2;

   348         s->raw_pallette[(offset - 0x200) >> 2] = val;

   349         pl110_update_pallette(s, n);

   350         return;

   351     }

   352     switch (offset >> 2) {

   353     case 0: /* LCDTiming0 */

   354         s->timing[0] = val;

   355         n = ((val & 0xfc) + 4) * 4;

   356         pl110_resize(s, n, s->rows);

   357         break;

   358     case 1: /* LCDTiming1 */

   359         s->timing[1] = val;

   360         n = (val & 0x3ff) + 1;

   361         pl110_resize(s, s->cols, n);

   362         break;

   363     case 2: /* LCDTiming2 */

   364         s->timing[2] = val;

   365         break;

   366     case 3: /* LCDTiming3 */

   367         s->timing[3] = val;

   368         break;

   369     case 4: /* LCDUPBASE */

   370         s->upbase = val;

   371         break;

   372     case 5: /* LCDLPBASE */

   373         s->lpbase = val;

   374         break;

   375     case 6: /* LCDIMSC */

   376         if (s->versatile)

   377             goto control;

   378     imsc:

   379         s->int_mask = val;

   380         pl110_update(s);

   381         break;

   382     case 7: /* LCDControl */

   383         if (s->versatile)

   384             goto imsc;

   385     control:

   386         s->cr = val;

   387         s->bpp = (val >> 1) & 7;

   388         if (pl110_enabled(s)) {

   389             gui_resize_vt(s->ds, s->cols, s->rows);

   390         }

   391         break;

   392     case 10: /* LCDICR */

   393         s->int_status &= ~val;

   394         pl110_update(s);

   395         break;

   396     default:

   397         cpu_abort (cpu_single_env, "pl110_write: Bad offset %x\n", (int)offset);

   398     }

   399 }

   400 

   401 static CPUReadMemoryFunc *pl110_readfn[] = {

   402    pl110_read,

   403    pl110_read,

   404    pl110_read

   405 };

   406 

   407 static CPUWriteMemoryFunc *pl110_writefn[] = {

   408    pl110_write,

   409    pl110_write,

   410    pl110_write

   411 };

   412 

   413 void *pl110_init(DisplayState *ds, uint32_t base, qemu_irq irq,

   414                  int versatile)

   415 {

   416     pl110_state *s;

   417     int iomemtype;

   418 

   419     s = (pl110_state *)qemu_mallocz(sizeof(pl110_state));

   420     iomemtype = cpu_register_io_memory(0, pl110_readfn,

   421                                        pl110_writefn, s);

   422     cpu_register_physical_memory(base, 0x00001000, iomemtype);

   423     s->versatile = versatile;

   424     s->irq = irq;

   425     s->ds = gui_get_graphic_console(NULL,

   426                                     pl110_update_display,

   427                                     pl110_invalidate_display,

   428                                     NULL, s);

   429 

   430     /* ??? Save/restore.  */

   431     return s;

   432 }