ppc4xx: lwmon5: Update Lime initialization

Change Lime SDRAM initialization to now support 100MHz and
133MHz (if enabled). Also the framebuffer is initialized to
display a blue rectangle with a white border.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>

2 files changed, 73 insertions, 5 deletions

diff --git a/board/lwmon5/lwmon5.c b/board/lwmon5/lwmon5.c
index 66cef2f..830ec19 100644
--- a/board/lwmon5/lwmon5.c
+++ b/board/lwmon5/lwmon5.c
@@ -221,8 +221,8 @@ int misc_init_r(void)
 	udelay(500);
 	gpio_write_bit(CFG_GPIO_LIME_RST, 1);
 
-	/* Lime memory clock adjusted to 133MHz */
-	out_be32((void *)CFG_LIME_SDRAM_CLOCK, CFG_LIME_CLOCK_133MHZ);
+	/* Lime memory clock adjusted to 100MHz */
+	out_be32((void *)CFG_LIME_SDRAM_CLOCK, CFG_LIME_CLOCK_100MHZ);
 	/* Wait untill time expired. Because of requirements in lime manual */
 	udelay(300);
 	/* Write lime controller memory parameters */
@@ -237,6 +237,64 @@ int misc_init_r(void)
 	gpio_write_bit(CFG_GPIO_PHY0_RST, 1);
 	gpio_write_bit(CFG_GPIO_PHY1_RST, 1);
 
+	/*
+	 * Init display controller
+	 */
+	/* Setup dot clock (internal PLL, division rate 1/16) */
+	out_be32((void *)0xc1fd0100, 0x00000f00);
+
+	/* Lime L0 init (16 bpp, 640x480) */
+	out_be32((void *)0xc1fd0020, 0x801401df);
+	out_be32((void *)0xc1fd0024, 0x0);
+	out_be32((void *)0xc1fd0028, 0x0);
+	out_be32((void *)0xc1fd002c, 0x0);
+	out_be32((void *)0xc1fd0110, 0x0);
+	out_be32((void *)0xc1fd0114, 0x0);
+	out_be32((void *)0xc1fd0118, 0x01df0280);
+
+	/* Display timing init */
+	out_be32((void *)0xc1fd0004, 0x031f0000);
+	out_be32((void *)0xc1fd0008, 0x027f027f);
+	out_be32((void *)0xc1fd000c, 0x015f028f);
+	out_be32((void *)0xc1fd0010, 0x020c0000);
+	out_be32((void *)0xc1fd0014, 0x01df01ea);
+	out_be32((void *)0xc1fd0018, 0x0);
+	out_be32((void *)0xc1fd001c, 0x01e00280);
+
+#if 1
+	/*
+	 * Clear framebuffer using Lime's drawing engine
+	 * (draw blue rect. with white border around it)
+	 */
+	/* Setup mode and fbbase, xres, fg, bg */
+	out_be32((void *)0xc1ff0420, 0x8300);
+	out_be32((void *)0xc1ff0440, 0x0000);
+	out_be32((void *)0xc1ff0444, 0x0280);
+	out_be32((void *)0xc1ff0480, 0x7fff);
+	out_be32((void *)0xc1ff0484, 0x0000);
+	/* Reset clipping rectangle */
+	out_be32((void *)0xc1ff0454, 0x0000);
+	out_be32((void *)0xc1ff0458, 0x0280);
+	out_be32((void *)0xc1ff045c, 0x0000);
+	out_be32((void *)0xc1ff0460, 0x01e0);
+	/* Draw white rect. */
+	out_be32((void *)0xc1ff04a0, 0x09410000);
+	out_be32((void *)0xc1ff04a0, 0x00000000);
+	out_be32((void *)0xc1ff04a0, 0x01e00280);
+	udelay(2000);
+	/* Draw blue rect. */
+	out_be32((void *)0xc1ff0480, 0x001f);
+	out_be32((void *)0xc1ff04a0, 0x09410000);
+	out_be32((void *)0xc1ff04a0, 0x00010001);
+	out_be32((void *)0xc1ff04a0, 0x01de027e);
+#endif
+	/* Display enable, L0 layer */
+	out_be32((void *)0xc1fd0100, 0x80010f00);
+
+	/* TFT-LCD enable - PWM duty, lamp on */
+	out_be32((void *)0xc4000024, 0x64);
+	out_be32((void *)0xc4000020, 0x701);
+
 	return 0;
 }
 
diff --git a/include/configs/lwmon5.h b/include/configs/lwmon5.h
index 55e2c94..b09b478 100644
--- a/include/configs/lwmon5.h
+++ b/include/configs/lwmon5.h
@@ -341,14 +341,24 @@
  * Graphics (Fujitsu Lime)
  *----------------------------------------------------------------------*/
 /* SDRAM Clock frequency adjustment register */
-#define CFG_LIME_SDRAM_CLOCK	0xC1FC0000
-/* Lime Clock frequency is to set 133MHz */
+#define CFG_LIME_SDRAM_CLOCK	0xC1FC0038
+/* Lime Clock frequency is to set 100MHz */
+#define CFG_LIME_CLOCK_100MHZ	0x00000
+#if 0
+/* Lime Clock frequency for 133MHz */
 #define CFG_LIME_CLOCK_133MHZ	0x10000
+#endif
 
 /* SDRAM Parameter register */
 #define CFG_LIME_MMR		0xC1FCFFFC
-/* SDRAM parameter value */
+/* SDRAM parameter value; was 0x414FB7F2, caused several vertical bars
+   and pixel flare on display when 133MHz was configured. According to
+   SDRAM chip datasheet CAS Latency is 3 for 133MHz and -75 Speed Grade */
+#ifdef CFG_LIME_CLOCK_133MHZ
+#define CFG_LIME_MMR_VALUE	0x414FB7F3
+#else
 #define CFG_LIME_MMR_VALUE	0x414FB7F2
+#endif
 
 /*-----------------------------------------------------------------------
  * GPIO Setup