1 files changed, 230 insertions, 0 deletions

diff --git a/firmware/target/arm/imx31/gigabeat-s/lcd-imx31.c b/firmware/target/arm/imx31/gigabeat-s/lcd-imx31.c
new file mode 100644
index 0000000000..c9cce6d653
--- /dev/null
+++ b/firmware/target/arm/imx31/gigabeat-s/lcd-imx31.c
@@ -0,0 +1,230 @@
+#include "config.h"
+#include "cpu.h"
+#include "string.h"
+#include "lcd.h"
+#include "kernel.h"
+#include "lcd-target.h"
+
+#define LCDADDR(x, y) (&lcd_framebuffer[(y)][(x)])
+
+static volatile bool lcd_on = true;
+volatile bool lcd_poweroff = false;
+/*
+** These are imported from lcd-16bit.c
+*/
+extern unsigned fg_pattern;
+extern unsigned bg_pattern;
+
+#if 0
+bool lcd_enabled()
+{
+    return lcd_on;
+}
+#endif
+
+void printscreen(unsigned int colour) {
+    int i;
+    int base = 0x84100000;
+    for(i=0;i<(320*240*2);i++) {
+        writel(colour,base);
+        base++;
+    }
+}
+
+unsigned int LCDBANK(unsigned int address)
+{
+    return ((address >> 22) & 0xff);
+}
+
+unsigned int LCDBASEU(unsigned int address)
+{
+    return (address & ((1 << 22)-1)) >> 1;
+}
+
+unsigned int LCDBASEL(unsigned int address)
+{
+    address += 320*240*2;
+    return (address & ((1 << 22)-1)) >> 1;
+}
+
+
+/* LCD init */
+void lcd_init_device(void)
+{
+    int i;
+#ifdef BOOTLOADER
+    /* When the Rockbox bootloader starts, we are changing framebuffer address,
+       but we don't want what's shown on the LCD to change until we do an
+       lcd_update(), so copy the data from the old framebuffer to the new one */
+    unsigned short *buf = (unsigned short*)FRAME1;
+        
+    memcpy(FRAME1, (short *)((LCDSADDR1)<<1), 320*240*2);
+
+    /* The Rockbox bootloader is transitioning from RGB555I to RGB565 mode
+       so convert the frambuffer data accordingly */
+    for(i=0; i< 320*240; i++){
+        *buf = ((*buf>>1) & 0x1F) | (*buf & 0xffc0);
+        buf++;
+    }
+    return;
+#endif
+}
+
+/* Update a fraction of the display. */
+void lcd_update_rect(int x, int y, int width, int height)
+{
+    (void)x;
+    (void)width;
+    (void)y;
+    (void)height;
+
+    if(!lcd_on)
+    {
+        sleep(200);
+        return;
+    }
+    memcpy(((char*)FRAME2) + (y * sizeof(fb_data) * LCD_WIDTH), ((char *)&lcd_framebuffer) + (y * sizeof(fb_data) * LCD_WIDTH), ((height * sizeof(fb_data) * LCD_WIDTH)));
+}
+
+void lcd_enable(bool state)
+{
+    (void)state;
+}
+
+bool lcd_enabled(void)
+{
+    return true;
+}
+
+/* Update the display.
+   This must be called after all other LCD functions that change the display. */
+void lcd_update(void)
+{
+    lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
+}
+
+void lcd_bitmap_transparent_part(const fb_data *src, int src_x, int src_y,
+                                 int stride, int x, int y, int width,
+                                 int height)
+{
+    fb_data *dst, *dst_end;
+    unsigned int transcolor;
+
+    /* nothing to draw? */
+    if ((width <= 0) || (height <= 0) || (x >= LCD_WIDTH) || (y >= LCD_HEIGHT)
+        || (x + width <= 0) || (y + height <= 0))
+        return;
+
+    /* clipping */
+    if (x < 0)
+    {
+        width += x;
+        src_x -= x;
+        x = 0;
+    }
+    if (y < 0)
+    {
+        height += y;
+        src_y -= y;
+        y = 0;
+    }
+    if (x + width > LCD_WIDTH)
+        width = LCD_WIDTH - x;
+    if (y + height > LCD_HEIGHT)
+        height = LCD_HEIGHT - y;
+
+    src += stride * src_y + src_x; /* move starting point */
+    dst = &lcd_framebuffer[(y)][(x)];
+    dst_end = dst + height * LCD_WIDTH;
+    width *= 2;
+    stride *= 2;
+    transcolor = TRANSPARENT_COLOR;
+    asm volatile(
+    "rowstart:  \n"
+        "mov    r0, #0  \n"
+    "nextpixel:  \n"
+        "ldrh   r1, [%0, r0]   \n"  /* Load word src+r0 */
+        "cmp    r1, %5 \n"             /* Compare to transparent color */
+        "strneh r1, [%1, r0]   \n"  /* Store dst+r0 if not transparent */
+        "add    r0, r0, #2  \n"
+        "cmp    r0, %2 \n"             /* r0 == width? */         
+        "bne    nextpixel \n"        /* More in this row? */
+        "add    %0, %0, %4  \n"     /* src += stride */
+        "add    %1, %1, #480 \n"    /* dst += LCD_WIDTH (x2) */
+        "cmp    %1, %3 \n"             
+        "bne    rowstart \n"        /* if(dst != dst_end), keep going */
+        : : "r" (src), "r" (dst), "r" (width), "r" (dst_end), "r" (stride), "r" (transcolor) : "r0", "r1" );
+}
+
+/* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */
+extern void lcd_write_yuv420_lines(fb_data *dst,
+                                   unsigned char chroma_buf[LCD_HEIGHT/2*3],
+                                   unsigned char const * const src[3],
+                                   int width,
+                                   int stride);
+/* Performance function to blit a YUV bitmap directly to the LCD */
+/* For the Gigabeat - show it rotated */
+/* So the LCD_WIDTH is now the height */
+void lcd_yuv_blit(unsigned char * const src[3],
+                  int src_x, int src_y, int stride,
+                  int x, int y, int width, int height)
+{
+    /* Caches for chroma data so it only need be recaculated every other
+       line */
+    unsigned char chroma_buf[LCD_HEIGHT/2*3]; /* 480 bytes */
+    unsigned char const * yuv_src[3];
+    off_t z;
+
+    if (!lcd_on)
+        return;
+
+    /* Sorry, but width and height must be >= 2 or else */
+    width &= ~1;
+    height >>= 1;
+
+    fb_data *dst = (fb_data*)FRAME1 + x * LCD_WIDTH + (LCD_WIDTH - y) - 1;
+
+    z = stride*src_y;
+    yuv_src[0] = src[0] + z + src_x;
+    yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1);
+    yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
+
+    do
+    {
+        lcd_write_yuv420_lines(dst, chroma_buf, yuv_src, width,
+                               stride);
+        yuv_src[0] += stride << 1; /* Skip down two luma lines */
+        yuv_src[1] += stride >> 1; /* Skip down one chroma line */
+        yuv_src[2] += stride >> 1;
+        dst -= 2;
+    }
+    while (--height > 0);
+}
+
+void lcd_set_contrast(int val) {
+  (void) val;
+  // TODO:
+}
+
+void lcd_set_invert_display(bool yesno) {
+  (void) yesno;
+  // TODO:
+}
+
+void lcd_blit(const fb_data* data, int bx, int y, int bwidth,
+              int height, int stride)
+{
+  (void) data;
+  (void) bx;
+  (void) y;
+  (void) bwidth;
+  (void) height;
+  (void) stride;
+  //TODO:
+}
+
+void lcd_set_flip(bool yesno) {
+  (void) yesno;
+  // TODO:
+}
+