Sansa clip+: fix display brightness for players with newer OLED controller type (and reorganise the variant detection a bit in the process)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27522 a1c6a512-1295-4272-9138-f99709370657

firmware/target/arm/as3525/lcd-clip.h

@@ -20,10 +20,10 @@
  ****************************************************************************/
 
 #include "config.h"
-#include "ascodec.h"
 
-void lcd_hw_init(int *offset) INIT_ATTR;
+/* return variant number: 0 = clipv1, old clip+, 1 = newer clip+ */
-static inline void lcd_enable_power(bool onoff)
+int lcd_hw_init(void) INIT_ATTR;
-{
+
-    ascodec_write(AS3514_DCDC15, onoff ? 1 : 0);
+/* target-specific power enable */
-}
+void lcd_enable_power(bool onoff);
+

firmware/target/arm/as3525/lcd-ssd1303.c

@@ -44,7 +44,6 @@
 #define LCD_SET_REVERSE_DISPLAY                   ((char)0xA7)
 #define LCD_SET_MULTIPLEX_RATIO                   ((char)0xA8)
 #define LCD_SET_DC_DC                             ((char)0xAD)
-#define LCD_SET_DC_DC_PART2                       ((char)0x8A)
 #define LCD_SET_DISPLAY_OFF                       ((char)0xAE)
 #define LCD_SET_DISPLAY_ON                        ((char)0xAF)
 #define LCD_SET_PAGE_ADDRESS                      ((char)0xB0)
@@ -68,6 +67,13 @@
 /** globals **/
 
 static bool display_on; /* used by lcd_enable */
+
+/* Display variant, always 0 in clipv1, clipv2, can be 0 or 1 in clip+
+ * variant 0: has 132 pixel wide framebuffer, max brightness about 50
+ * variant 1: has 128 pixel wide framebuffer, max brightness about 128
+ */
+static int variant;
+
 static int offset; /* column offset */
 
 /*** hardware configuration ***/
@@ -80,6 +86,9 @@ int lcd_default_contrast(void)
 void lcd_set_contrast(int val)
 {
     lcd_write_command(LCD_CNTL_CONTRAST);
+    if (variant == 1) {
+        val = val * 5 / 2;
+    }
     lcd_write_command(val);
 }
 
@@ -137,7 +146,8 @@ void lcd_init_device(void)
 {
     int i;
 
-    lcd_hw_init(&offset);
+    variant = lcd_hw_init();
+    offset = (variant == 0) ? 2 : 0;
 
     /* Set display clock (divide ratio = 1) and oscillator frequency (1) */
     lcd_write_command(LCD_SET_DISPLAY_CLOCK_AND_OSC_FREQ);
@@ -154,9 +164,9 @@ void lcd_init_device(void)
     /* Set contrast register to 12% */
     lcd_set_contrast(lcd_default_contrast());
 
-    /* Disable DC-DC */
+    /* Configure DC-DC */
     lcd_write_command(LCD_SET_DC_DC);
-    lcd_write_command(LCD_SET_DC_DC_PART2/*|0*/);
+    lcd_write_command((variant == 0) ? 0x8A : 0x10);
 
     /* Set starting line as 0 */
     lcd_write_command(LCD_SET_DISPLAY_START_LINE /*|(0 & 0x3f)*/);

firmware/target/arm/as3525/sansa-clip/lcd-clip.c

@@ -25,8 +25,11 @@
 #include "lcd-clip.h"
 #include "system.h"
 #include "cpu.h"
+#include "ascodec.h"
 
-void lcd_hw_init(int *offset)
+#define LCD_DELAY 1
+
+int lcd_hw_init(void)
 {
 /* DBOP initialisation, do what OF does */
     CGU_DBOP = (1<<3) | AS3525_DBOP_DIV;
@@ -46,11 +49,9 @@ void lcd_hw_init(int *offset)
     GPIOA_PIN(4) = 0;
     GPIOB_PIN(6) = (1<<6);
 
-    *offset = 2;
+    return 0;
 }
 
-#define LCD_DELAY 1
-
 void lcd_write_command(int byte)
 {
     volatile int i = 0;
@@ -90,3 +91,9 @@ void lcd_write_data(const fb_data* p_bytes, int count)
     /* While push fifo is not empty */
     while ((DBOP_STAT & (1<<10)) == 0);
 }
+
+void lcd_enable_power(bool onoff)
+{
+    ascodec_write(AS3514_DCDC15, onoff ? 1 : 0);
+}
+

firmware/target/arm/as3525/sansa-clipplus/lcd-clip-plus.c

@@ -26,7 +26,7 @@
 #include "system.h"
 #include "cpu.h"
 
-void lcd_hw_init(int *offset)
+int lcd_hw_init(void)
 {
     bitset32(&CGU_PERI, CGU_SSP_CLOCK_ENABLE);
 
@@ -41,7 +41,7 @@ void lcd_hw_init(int *offset)
     GPIOB_PIN(7) = 0;
     GPIOA_PIN(5) = (1<<5);
 
-    *offset = GPIOB_PIN(3) ? 0 : 2;
+    return GPIOB_PIN(3) ? 1 : 0;
 }
 
 void lcd_write_command(int byte)
@@ -68,3 +68,9 @@ void lcd_write_data(const fb_data* p_bytes, int count)
         SSP_DATA = *p_bytes++;
     }
 }
+
+void lcd_enable_power(bool onoff)
+{
+    (void) onoff;
+}
+

firmware/target/arm/as3525/sansa-clipplus/lcd-clip.h

@@ -1,28 +0,0 @@
-/***************************************************************************
- *             __________               __   ___.
- *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
- *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
- *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
- *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
- *                     \/            \/     \/    \/            \/
- * $Id$
- *
- * Copyright (C) 2008-2009 Rafaël Carré
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
- * KIND, either express or implied.
- *
- ****************************************************************************/
-
-#include "config.h"
-
-void lcd_hw_init(int *offset) INIT_ATTR;
-static inline void lcd_enable_power(bool onoff)
-{
-    (void) onoff;
-}

firmware/target/arm/as3525/sansa-clipv2/lcd-clip.h

@@ -1,28 +0,0 @@
-/***************************************************************************
- *             __________               __   ___.
- *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
- *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
- *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
- *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
- *                     \/            \/     \/    \/            \/
- * $Id$
- *
- * Copyright (C) 2008-2009 Rafaël Carré
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
- * KIND, either express or implied.
- *
- ****************************************************************************/
-
-#include "config.h"
-
-void lcd_hw_init(int *offset) INIT_ATTR;
-static inline void lcd_enable_power(bool onoff)
-{
-    (void) onoff;
-}

firmware/target/arm/as3525/sansa-clipv2/lcd-clipv2.c

@@ -26,7 +26,9 @@
 #include "system.h"
 #include "cpu.h"
 
-void lcd_hw_init(int *offset)
+#define LCD_DELAY 10
+
+int lcd_hw_init(void)
 {
 /* DBOP initialisation, do what OF does */
     bitset32(&CCU_IO, 1<<12); /* ?? */
@@ -39,11 +41,9 @@ void lcd_hw_init(int *offset)
     GPIOB_DIR |= (1<<2)|(1<<5);
     GPIOB_PIN(5) = (1<<5);
 
-    *offset = 2;
+    return 0;
 }
 
-#define LCD_DELAY 10
-
 void lcd_write_command(int byte)
 {
     volatile int i = 0;
@@ -84,3 +84,9 @@ void lcd_write_data(const fb_data* p_bytes, int count)
     /* While push fifo is not empty */
     while ((DBOP_STAT & (1<<10)) == 0);
 }
+
+void lcd_enable_power(bool onoff)
+{
+    (void) onoff;
+}
+