m:robe 100

- lcd driver tidied up and optimised 
- lcd flip and inverse display enabled 
(based on logikdax driver and work by lowlight)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16944 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 175 insertions, 93 deletions

diff --git a/firmware/target/arm/olympus/mrobe-100/lcd-mr100.c b/firmware/target/arm/olympus/mrobe-100/lcd-mr100.c
index 9fb6790cc4..d3c913f4d7 100644
--- a/firmware/target/arm/olympus/mrobe-100/lcd-mr100.c
+++ b/firmware/target/arm/olympus/mrobe-100/lcd-mr100.c
@@ -22,18 +22,109 @@
 #include "kernel.h"
 #include "system.h"
 
-/* send LCD data */
-static void lcd_send_data(unsigned data)
+/* The m:robe 100 display has a register set that is very similar to the
+   Solomon SSD1815 */
+
+/*** definitions ***/
+
+#define LCD_SET_LOWER_COLUMN_ADDRESS              ((char)0x00)
+#define LCD_SET_HIGHER_COLUMN_ADDRESS             ((char)0x10)
+#define LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO ((char)0x20)
+#define LCD_SET_POWER_CONTROL_REGISTER            ((char)0x28)
+#define LCD_SET_DISPLAY_START_LINE                ((char)0x40)
+#define LCD_SET_CONTRAST_CONTROL_REGISTER         ((char)0x81)
+#define LCD_SET_SEGMENT_REMAP                     ((char)0xA0)
+#define LCD_SET_LCD_BIAS                          ((char)0xA2)
+#define LCD_SET_ENTIRE_DISPLAY_OFF                ((char)0xA4)
+#define LCD_SET_ENTIRE_DISPLAY_ON                 ((char)0xA5)
+#define LCD_SET_NORMAL_DISPLAY                    ((char)0xA6)
+#define LCD_SET_REVERSE_DISPLAY                   ((char)0xA7)
+#define LCD_SET_MULTIPLEX_RATIO                   ((char)0xA8)
+#define LCD_SET_BIAS_TC_OSC                       ((char)0xA9)
+#define LCD_SET_1OVER4_BIAS_RATIO                 ((char)0xAA)
+#define LCD_SET_INDICATOR_OFF                     ((char)0xAC)
+#define LCD_SET_INDICATOR_ON                      ((char)0xAD)
+#define LCD_SET_DISPLAY_OFF                       ((char)0xAE)
+#define LCD_SET_DISPLAY_ON                        ((char)0xAF)
+#define LCD_SET_PAGE_ADDRESS                      ((char)0xB0)
+#define LCD_SET_COM_OUTPUT_SCAN_DIRECTION         ((char)0xC0)
+#define LCD_SET_TOTAL_FRAME_PHASES                ((char)0xD2)
+#define LCD_SET_DISPLAY_OFFSET                    ((char)0xD3)
+#define LCD_SET_READ_MODIFY_WRITE_MODE            ((char)0xE0)
+#define LCD_SOFTWARE_RESET                        ((char)0xE2)
+#define LCD_NOP                                   ((char)0xE3)
+#define LCD_SET_END_OF_READ_MODIFY_WRITE_MODE     ((char)0xEE)
+
+/* LCD command codes */
+
+#define LCD_CNTL_RESET          0xe2    /* Software reset */
+#define LCD_CNTL_POWER          0x2f    /* Power control */
+#define LCD_CNTL_CONTRAST       0x81    /* Contrast */
+#define LCD_CNTL_OUTSCAN        0xc8    /* Output scan direction */
+#define LCD_CNTL_SEGREMAP       0xa1    /* Segment remap */
+#define LCD_CNTL_DISPON         0xaf    /* Display on */
+
+#define LCD_CNTL_PAGE           0xb0    /* Page address */
+#define LCD_CNTL_HIGHCOL        0x10    /* Upper column address */
+#define LCD_CNTL_LOWCOL         0x00    /* Lower column address */
+
+/* send LCD command */
+
+void lcd_write_command(int byte)
 {
     while (LCD1_CONTROL & LCD1_BUSY_MASK); /* wait for LCD */
-    LCD1_DATA = data;
+    LCD1_CMD = byte;
 }
 
-/* send LCD command */
-static void lcd_send_command(unsigned cmd)
+/* send LCD data */
+
+void lcd_write_data(const fb_data* p_bytes, int count)
 {
-    while (LCD1_CONTROL & LCD1_BUSY_MASK); /* wait for LCD */
-    LCD1_CMD = cmd;
+    while (count--)
+    {
+        while (LCD1_CONTROL & LCD1_BUSY_MASK); /* wait for LCD */
+        LCD1_DATA = *(p_bytes++);
+    }    
+}
+
+static int xoffset; /* needed for flip */
+
+/*** hardware configuration ***/
+
+int lcd_default_contrast(void)
+{
+    return DEFAULT_CONTRAST_SETTING;
+}
+
+void lcd_set_contrast(int val)
+{
+    lcd_write_command(LCD_CNTL_CONTRAST);
+    lcd_write_command(val);
+}
+
+void lcd_set_invert_display(bool yesno)
+{
+    if (yesno) 
+        lcd_write_command(LCD_SET_REVERSE_DISPLAY);
+    else
+        lcd_write_command(LCD_SET_NORMAL_DISPLAY);
+}
+
+/* turn the display upside down (call lcd_update() afterwards) */
+void lcd_set_flip(bool yesno)
+{
+    if (!yesno)
+    {
+        /* normal */
+        lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION | 0xc);
+        xoffset = 240 - LCD_WIDTH; /* 240 colums minus the 160 we have */
+    }
+    else
+    {
+        /* upside-down */
+        lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION);
+        xoffset = 0;
+    }
 }
 
 /* LCD init */
@@ -59,83 +150,67 @@ void lcd_init_device(void)
     LCD1_CONTROL = 0x694;
 
     /* OF just reads these */
-    i = LCD1_CONTROL;
-    i = inl(0x70003004);
-    i = LCD1_CMD;
-    i = inl(0x7000300c);
-
-#if 0
-    /* this is skipped in the OF */ 
-    LCD1_CONTROL &= ~0x200;
-    LCD1_CONTROL &= ~0x800;
-    LCD1_CONTROL &= ~0x400;
-#endif
+    LCD1_CONTROL;
+    inl(0x70003004);
+    LCD1_CMD;
+    inl(0x7000300c);
 
     LCD1_CONTROL |= 0x1;
     udelay(15000);
 
-    lcd_send_command(0xe2);
-    lcd_send_command(0x2f);
-    lcd_send_command(0x26);
-    lcd_send_command(0xcc);
-    lcd_send_command(0xe8);
-    lcd_send_command(0x81);
-    lcd_send_command(0);
-    lcd_send_command(0x40);
-    lcd_send_command(0xa6);
-    lcd_send_command(0x88);
-    lcd_send_command(0xb0);
-    lcd_send_command(0x10);
-    lcd_send_command(0);
-}
+    lcd_write_command(LCD_SOFTWARE_RESET);                   /* 0xE2 */
+    lcd_write_command(LCD_SET_POWER_CONTROL_REGISTER + 7);   /* 0x2F */
+               /* power control register: op-amp=1, regulator=1, booster=1 */
+    lcd_write_command(LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO + 6); /* 0x26 */ 
 
-/*** hardware configuration ***/
-int lcd_default_contrast(void)
-{
-    return DEFAULT_CONTRAST_SETTING;
-}
+    lcd_set_flip(false);                                    /* 0xCC */
 
-void lcd_set_contrast(int val)
-{
-    lcd_send_command(0x81);
-    lcd_send_command(val);
-}
+    lcd_write_command(0xe8);
 
-void lcd_set_invert_display(bool yesno)
-{
-  /* TODO: Implement lcd_set_invert_display() */
-  (void)yesno;
-}
+    lcd_set_contrast(lcd_default_contrast());               /* 0x80, 0x00 */
 
-/* turn the display upside down (call lcd_update() afterwards) */
-void lcd_set_flip(bool yesno)
-{
-  /* TODO: Implement lcd_set_flip() */
-  (void)yesno;
+    lcd_write_command(LCD_SET_DISPLAY_START_LINE + 0);       /* 0x40 */
+    lcd_write_command(LCD_SET_NORMAL_DISPLAY);               /* 0xA6 */
+
+    lcd_write_command(0x88);
+
+    lcd_write_command(LCD_SET_PAGE_ADDRESS);                 /* 0xB0 */
+    lcd_write_command(LCD_SET_HIGHER_COLUMN_ADDRESS + 0);    /* 0x10 */
+    lcd_write_command(LCD_SET_LOWER_COLUMN_ADDRESS + 0);     /* 0x00 */
+
+    lcd_write_command(LCD_SET_DISPLAY_ON);                   /* 0xAF */
 }
 
 /*** update functions ***/
 
 /* Performance function that works with an external buffer
    note that by and bheight are in 8-pixel units! */
-void lcd_blit_mono(const unsigned char *data, int x, int by, int width,
-                   int bheight, int stride)
+void lcd_blit_mono(const unsigned char* data, int x, int by, int width,
+              int bheight, int stride)
 {
-    /* TODO: Implement lcd_blit() */
-    (void)data;
-    (void)x;
-    (void)by;
-    (void)width;
-    (void)bheight;
-    (void)stride;
+    int cmd1, cmd2;
+
+    cmd1 = LCD_CNTL_HIGHCOL | (((x + xoffset) >> 4) & 0xf);
+    cmd2 = LCD_CNTL_LOWCOL | ((x + xoffset) & 0xf);
+
+    /* Copy display bitmap to hardware */
+    while (bheight--)
+    {
+        lcd_write_command(LCD_CNTL_PAGE | (by++ & 0xff));
+        lcd_write_command(cmd1);
+        lcd_write_command(cmd2);
+
+        lcd_write_data(data, width);
+
+        data += stride;
+    }
 }
 
 /* Performance function that works with an external buffer
-   note that by and bheight are in 4-pixel units! */
+   note that by and bheight are in 8-pixel units! */
 void lcd_blit_grey_phase(unsigned char *values, unsigned char *phases,
                          int x, int by, int width, int bheight, int stride)
 {
-    /* TODO: Implement lcd_grey_phase_blit() */
     (void)values;
     (void)phases;
     (void)x;
@@ -144,49 +219,56 @@ void lcd_blit_grey_phase(unsigned char *values, unsigned char *phases,
     (void)bheight;
     (void)stride;
 }
-
+ 
 /* Update the display.
    This must be called after all other LCD functions that change the display. */
+void lcd_update(void) ICODE_ATTR;
 void lcd_update(void)
 {
-    lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
+    int y, cmd1, cmd2;
+
+    cmd1 = LCD_CNTL_HIGHCOL | (((xoffset) >> 4) & 0xf);
+    cmd2 = LCD_CNTL_LOWCOL | ((xoffset) & 0xf);
+
+    /* Copy display bitmap to hardware */
+    for (y = 0; y < LCD_FBHEIGHT; y++)
+    {
+        lcd_write_command (LCD_CNTL_PAGE | (y & 0xf));
+        lcd_write_command(cmd1);
+        lcd_write_command(cmd2);
+
+        lcd_write_data (lcd_framebuffer[y], LCD_WIDTH);
+    }
 }
 
 /* Update a fraction of the display. */
-void lcd_update_rect(int x0, int y0, int width, int height)
+void lcd_update_rect(int, int, int, int) ICODE_ATTR;
+void lcd_update_rect(int x, int y, int width, int height)
 {
-    unsigned char *addr;
-    unsigned int cmd0, cmd1, cmd2;
-    int r, c, x1, y1, start_row, last_row;
+    int ymax, cmd1, cmd2;
 
-    x1 = (x0 + width) - 1;
-    y1 = (y0 + height) - 1;
-    if ((x1 <= 0) || (y1 <= 0))
-        return;
+    /* The Y coordinates have to work on even 8 pixel rows */
+    ymax = (y + height - 1) >> 3;
+    y >>= 3;
 
-    if(x1 >= LCD_WIDTH)
-        x1 = LCD_WIDTH - 1;
+    if(x + width > LCD_WIDTH)
+        width = LCD_WIDTH - x;
+    if (width <= 0)
+        return; /* nothing left to do, 0 is harmful to lcd_write_data() */
+    if(ymax >= LCD_FBHEIGHT)
+        ymax = LCD_FBHEIGHT-1;
 
-    if(y1 >= LCD_HEIGHT)
-        y1 = LCD_HEIGHT - 1;
 
-    start_row = y0/8;
-    last_row  = y1/8;
+    cmd1 = LCD_CNTL_HIGHCOL | (((x + xoffset) >> 4) & 0xf);
+    cmd2 = LCD_CNTL_LOWCOL | ((x + xoffset) & 0xf);
 
-    cmd1 = (x0 & 0xff) >> 4;
-    cmd1 = (cmd1 + 5) | 0x10;
-    cmd2 = x0 & 0xf;
+    /* Copy specified rectange bitmap to hardware */
+    for (; y <= ymax; y++)
+    {
+        lcd_write_command(LCD_CNTL_PAGE | (y & 0xf));
+        lcd_write_command(cmd1);
+        lcd_write_command(cmd2);
 
-    for (r = start_row; r <= last_row; r++) {
-        cmd0 = (r & 0xff) | 0xb0;
-        lcd_send_command(cmd0);
-        lcd_send_command(cmd1);
-        lcd_send_command(cmd2);
-
-        addr = (unsigned char*)&lcd_framebuffer[r][x0];
-        for (c = x0; c <= x1; c++)
-            lcd_send_data(*(addr++));
+        lcd_write_data (&lcd_framebuffer[y][x], width);
     }
-
-    lcd_send_command(0xaf);
 }