1 files changed, 267 insertions, 0 deletions

diff --git a/firmware/target/arm/tcc77x/lcd-ssd1815.c b/firmware/target/arm/tcc77x/lcd-ssd1815.c
new file mode 100644
index 0000000000..4101f6ab7d
--- /dev/null
+++ b/firmware/target/arm/tcc77x/lcd-ssd1815.c
@@ -0,0 +1,267 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 by Alan Korr
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "config.h"
+
+#include "hwcompat.h"
+#include "kernel.h"
+#include "lcd.h"
+#include "system.h"
+#include "cpu.h"
+
+/*** 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 */
+
+/* TCC77x specific defines */
+#define LCD_BASE 0x50000000
+#define LCD_CMD   *(volatile unsigned char*)(LCD_BASE)
+#define LCD_DATA  *(volatile unsigned char*)(LCD_BASE+1)
+
+void lcd_write_command(int byte)
+{
+    LCD_CMD = byte;
+        
+    asm volatile (
+        "nop      \n\t"
+        "nop      \n\t"
+        "nop      \n\t"
+    );
+}
+
+void lcd_write_data(const fb_data* p_bytes, int count)
+{
+    while (count--)
+    {
+        LCD_DATA = *(p_bytes++);
+
+        asm volatile (
+            "nop      \n\t"
+            "nop      \n\t"
+            "nop      \n\t"
+        );
+    }
+}
+
+/* End of TCC77x specific defines */
+
+
+/** globals **/
+
+static int xoffset; /* needed for flip */
+
+/*** hardware configuration ***/
+
+int lcd_default_contrast(void)
+{
+    return 0x1f;
+}
+
+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)
+{
+    /* TODO: flip mode isn't working.  The commands in the else part of
+       this function are how the original firmware inits the LCD */
+
+    if (yesno)
+    {
+        lcd_write_command(LCD_SET_SEGMENT_REMAP | 0x01);
+        lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION);
+        xoffset = 132 - LCD_WIDTH; /* 132 colums minus the 128 we have */
+    }
+    else 
+    {
+        lcd_write_command(LCD_SET_SEGMENT_REMAP);
+        lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION | 0x08);
+        xoffset = 0;
+    }
+}
+
+
+/* LCD init */
+void lcd_init_device(void)
+{
+    uint32_t bus_width;
+
+    /* Telechips init the same as the original firmware */
+    CSCFG1 &= 0xc3ffc000;
+    CSCFG1 |= 0x3400101a;
+    CSCFG1 |= (1 << 21);
+    CSCFG1 &= ~(1 << 21);
+
+    bus_width = ((MCFG >> 11) & 0x3) ^ 3;
+
+    CSCFG1 = (bus_width << 28) |
+             (3 << 26) |                 /* MTYPE = 3 */
+             ((LCD_BASE >> 28) << 22) |  /* CSBASE = 0x5 */
+             (1 << 20) |                 /* Unknown */
+             (3 << 11) |                 /* Setup time = 3 cycles */
+             (3 << 3) |                  /* Pulse width = 3+1 cycles */
+             (1 << 0);                   /* Hold time = 1 cycle */
+
+    /* SSD1815 inits like the original firmware */
+    lcd_write_command(LCD_SET_DISPLAY_OFF);
+    lcd_set_flip(false);
+    lcd_write_command(LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO | 5);
+    lcd_set_contrast(lcd_default_contrast());
+    lcd_write_command(LCD_SET_POWER_CONTROL_REGISTER | 7);
+               /* power control register: op-amp=1, regulator=1, booster=1 */
+    lcd_write_command(LCD_SET_BIAS_TC_OSC);
+
+    /* 0xc2 = 110 000 10: Osc. Freq 110 - ???
+                          TC value 000  - "-0.01%/C (TC0, POR)"
+                          Bias ratio 10 - "1/9, 1/7 (POR)"
+     */
+    lcd_write_command(0xc2);
+    lcd_write_command(LCD_SET_DISPLAY_ON);
+
+    lcd_clear_display();
+    lcd_update();
+}
+
+/*** 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)
+{
+    /* Copy display bitmap to hardware */
+    while (bheight--)
+    {
+        lcd_write_command (LCD_CNTL_PAGE | (by++ & 0xf));
+        lcd_write_command (LCD_CNTL_HIGHCOL | (((x+xoffset)>>4) & 0xf));
+        lcd_write_command (LCD_CNTL_LOWCOL | ((x+xoffset) & 0xf));
+
+        lcd_write_data(data, width);
+        data += stride;
+    }
+}
+
+
+/* Performance function that works with an external buffer
+   note that by and bheight are in 8-pixel units! */
+void lcd_blit_grey_phase_blit(unsigned char *values, unsigned char *phases,
+                         int x, int by, int width, int bheight, int stride)
+{
+    (void)values;
+    (void)phases;
+    (void)x;
+    (void)by;
+    (void)width;
+    (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)
+{
+    int y;
+
+    /* Copy display bitmap to hardware */
+    for (y = 0; y < LCD_FBHEIGHT; y++)
+    {
+        lcd_write_command (LCD_CNTL_PAGE | (y & 0xf));
+        lcd_write_command (LCD_CNTL_HIGHCOL | ((xoffset >> 4) & 0xf));
+        lcd_write_command (LCD_CNTL_LOWCOL | (xoffset & 0xf));
+
+        lcd_write_data (lcd_framebuffer[y], LCD_WIDTH);
+    }
+}
+
+/* Update a fraction of the display. */
+void lcd_update_rect(int, int, int, int) ICODE_ATTR;
+void lcd_update_rect(int x, int y, int width, int height)
+{
+    int ymax;
+
+    /* The Y coordinates have to work on even 8 pixel rows */
+    ymax = (y + height-1) >> 3;
+    y >>= 3;
+
+    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;
+
+    /* Copy specified rectange bitmap to hardware */
+    for (; y <= ymax; y++)
+    {
+        lcd_write_command (LCD_CNTL_PAGE | (y & 0xf));
+        lcd_write_command (LCD_CNTL_HIGHCOL | (((x+xoffset) >> 4) & 0xf));
+        lcd_write_command (LCD_CNTL_LOWCOL | ((x+xoffset) & 0xf));
+
+        lcd_write_data (&lcd_framebuffer[y][x], width);
+    }
+}