pm2fb: hardware cursor support for the Permedia2

This patch adds hardware cursor support for the Permedia 2 chip.

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 120 insertions, 12 deletions

diff --git a/drivers/video/pm2fb.c b/drivers/video/pm2fb.c
index 53dd639e9753..20476f4c43ae 100644
--- a/drivers/video/pm2fb.c
+++ b/drivers/video/pm2fb.c
@@ -1257,18 +1257,8 @@ static const u8 cursor_bits_lookup[16] = {
 static int pm2vfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 {
         struct pm2fb_par *par = info->par;
-        u8 mode;
-
-        if (!hwcursor)
-                return -EINVAL; /* just to force soft_cursor() call */
-
-        /* Too large of a cursor or wrong bpp :-( */
-        if (cursor->image.width > 64 ||
-            cursor->image.height > 64 ||
-            cursor->image.depth > 1)
-                return -EINVAL;
+        u8 mode = PM2F_CURSORMODE_TYPE_X;
 
-        mode = PM2F_CURSORMODE_TYPE_X;
         if (cursor->enable)
                 mode |= PM2F_CURSORMODE_CURSOR_ENABLE;
 
@@ -1369,11 +1359,122 @@ static int pm2vfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 static int pm2fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 {
         struct pm2fb_par *par = info->par;
+        u8 mode;
+
+        if (!hwcursor)
+                return -EINVAL; /* just to force soft_cursor() call */
+
+        /* Too large of a cursor or wrong bpp :-( */
+        if (cursor->image.width > 64 ||
+            cursor->image.height > 64 ||
+            cursor->image.depth > 1)
+                return -EINVAL;
 
         if (par->type == PM2_TYPE_PERMEDIA2V)
                 return pm2vfb_cursor(info, cursor);
 
-        return -ENXIO;
+        mode = 0;
+        if (cursor->enable)
+                 mode = 0x43;
+
+        pm2_RDAC_WR(par, PM2I_RD_CURSOR_CONTROL, mode);
+
+        /*
+         * If the cursor is not be changed this means either we want the
+         * current cursor state (if enable is set) or we want to query what
+         * we can do with the cursor (if enable is not set)
+         */
+        if (!cursor->set)
+                return 0;
+
+        if (cursor->set & FB_CUR_SETPOS) {
+                int x, y;
+
+                x = cursor->image.dx + 63;
+                y = cursor->image.dy + 63;
+                WAIT_FIFO(par, 4);
+                pm2_WR(par, PM2R_RD_CURSOR_X_LSB, x & 0xff);
+                pm2_WR(par, PM2R_RD_CURSOR_X_MSB, (x >> 8) & 0x7);
+                pm2_WR(par, PM2R_RD_CURSOR_Y_LSB, y & 0xff);
+                pm2_WR(par, PM2R_RD_CURSOR_Y_MSB, (y >> 8) & 0x7);
+        }
+
+        if (cursor->set & FB_CUR_SETCMAP) {
+                u32 fg_idx = cursor->image.fg_color;
+                u32 bg_idx = cursor->image.bg_color;
+
+                WAIT_FIFO(par, 7);
+                pm2_WR(par, PM2R_RD_CURSOR_COLOR_ADDRESS, 1);
+                pm2_WR(par, PM2R_RD_CURSOR_COLOR_DATA,
+                        info->cmap.red[bg_idx] >> 8);
+                pm2_WR(par, PM2R_RD_CURSOR_COLOR_DATA,
+                        info->cmap.green[bg_idx] >> 8);
+                pm2_WR(par, PM2R_RD_CURSOR_COLOR_DATA,
+                        info->cmap.blue[bg_idx] >> 8);
+
+                pm2_WR(par, PM2R_RD_CURSOR_COLOR_DATA,
+                        info->cmap.red[fg_idx] >> 8);
+                pm2_WR(par, PM2R_RD_CURSOR_COLOR_DATA,
+                        info->cmap.green[fg_idx] >> 8);
+                pm2_WR(par, PM2R_RD_CURSOR_COLOR_DATA,
+                        info->cmap.blue[fg_idx] >> 8);
+        }
+
+        if (cursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETIMAGE)) {
+                u8 *bitmap = (u8 *)cursor->image.data;
+                u8 *mask = (u8 *)cursor->mask;
+                int i;
+
+                WAIT_FIFO(par, 1);
+                pm2_WR(par, PM2R_RD_PALETTE_WRITE_ADDRESS, 0);
+
+                for (i = 0; i < cursor->image.height; i++) {
+                        int j = (cursor->image.width + 7) >> 3;
+                        int k = 8 - j;
+
+                        WAIT_FIFO(par, 8);
+                        for (; j > 0; j--) {
+                                u8 data = *bitmap ^ *mask;
+
+                                if (cursor->rop == ROP_COPY)
+                                        data = *mask & *bitmap;
+                                /* bitmap data */
+                                pm2_WR(par, PM2R_RD_CURSOR_DATA, data);
+                                bitmap++;
+                                mask++;
+                        }
+                        for (; k > 0; k--)
+                                pm2_WR(par, PM2R_RD_CURSOR_DATA, 0);
+                }
+                for (; i < 64; i++) {
+                        int j = 8;
+                        WAIT_FIFO(par, 8);
+                        while (j-- > 0)
+                                pm2_WR(par, PM2R_RD_CURSOR_DATA, 0);
+                }
+
+                mask = (u8 *)cursor->mask;
+                for (i = 0; i < cursor->image.height; i++) {
+                        int j = (cursor->image.width + 7) >> 3;
+                        int k = 8 - j;
+
+                        WAIT_FIFO(par, 8);
+                        for (; j > 0; j--) {
+                                /* mask */
+                                pm2_WR(par, PM2R_RD_CURSOR_DATA, *mask);
+                                mask++;
+                        }
+                        for (; k > 0; k--)
+                                pm2_WR(par, PM2R_RD_CURSOR_DATA, 0);
+                }
+                for (; i < 64; i++) {
+                        int j = 8;
+                        WAIT_FIFO(par, 8);
+                        while (j-- > 0)
+                                pm2_WR(par, PM2R_RD_CURSOR_DATA, 0);
+                }
+        }
+        return 0;
 }
 
 /* ------------ Hardware Independent Functions ------------ */
diff --git a/include/video/permedia2.h b/include/video/permedia2.h
index c6575b834fef..9ce9adbfda2b 100644
--- a/include/video/permedia2.h
+++ b/include/video/permedia2.h
@@ -58,7 +58,14 @@
 #define PM2R_RD_PALETTE_DATA                            0x4008
 #define PM2R_RD_PIXEL_MASK                              0x4010
 #define PM2R_RD_PALETTE_READ_ADDRESS                    0x4018
+#define PM2R_RD_CURSOR_COLOR_ADDRESS                    0x4020
+#define PM2R_RD_CURSOR_COLOR_DATA                       0x4028
 #define PM2R_RD_INDEXED_DATA                            0x4050
+#define PM2R_RD_CURSOR_DATA                             0x4058
+#define PM2R_RD_CURSOR_X_LSB                            0x4060
+#define PM2R_RD_CURSOR_X_MSB                            0x4068
+#define PM2R_RD_CURSOR_Y_LSB                            0x4070
+#define PM2R_RD_CURSOR_Y_MSB                            0x4078
 
 #define PM2R_START_X_DOM                                0x8000
 #define PM2R_D_X_DOM                                    0x8008