p1022ds: add video support

Add support for the DIU controller.  If CONFIG_VIDEO is defined, then
the console will appear on a DVI monitor instead of the serial port.

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Anatolij Gustschin <agust@denx.de>

2 files changed, 112 insertions, 0 deletions

diff --git a/board/freescale/p1022ds/Makefile b/board/freescale/p1022ds/Makefile
index 8ede2d6..678eb2a 100644
--- a/board/freescale/p1022ds/Makefile
+++ b/board/freescale/p1022ds/Makefile
@@ -16,6 +16,8 @@ COBJS-y	+= ddr.o
 COBJS-y	+= law.o
 COBJS-y	+= tlb.o
 
+COBJS-$(CONFIG_FSL_DIU_FB) += diu.o
+
 SRCS	:= $(SOBJS:.o=.S) $(COBJS-y:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS-y))
 SOBJS	:= $(addprefix $(obj),$(SOBJS))
diff --git a/board/freescale/p1022ds/diu.c b/board/freescale/p1022ds/diu.c
new file mode 100644
index 0000000..5ca84df
--- /dev/null
+++ b/board/freescale/p1022ds/diu.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright 2010 Freescale Semiconductor, Inc.
+ * Authors: Timur Tabi <timur@freescale.com>
+ *
+ * FSL DIU Framebuffer driver
+ *
+ * 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.
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/io.h>
+#include <stdio_dev.h>
+#include <video_fb.h>
+#include "../common/ngpixis.h"
+#include <fsl_diu_fb.h>
+
+#define PX_BRDCFG0_ELBC_DIU	0x02
+
+#define PX_BRDCFG1_DVIEN	0x80
+#define PX_BRDCFG1_DFPEN	0x40
+#define PX_BRDCFG1_BACKLIGHT	0x20
+
+/*
+ * DIU Area Descriptor
+ *
+ * Note that we need to byte-swap the value before it's written to the AD
+ * register.  So even though the registers don't look like they're in the same
+ * bit positions as they are on the MPC8610, the same value is written to the
+ * AD register on the MPC8610 and on the P1022.
+ */
+#define AD_BYTE_F		0x10000000
+#define AD_ALPHA_C_SHIFT	25
+#define AD_BLUE_C_SHIFT		23
+#define AD_GREEN_C_SHIFT	21
+#define AD_RED_C_SHIFT		19
+#define AD_PIXEL_S_SHIFT	16
+#define AD_COMP_3_SHIFT		12
+#define AD_COMP_2_SHIFT		8
+#define AD_COMP_1_SHIFT		4
+#define AD_COMP_0_SHIFT		0
+
+void diu_set_pixel_clock(unsigned int pixclock)
+{
+	ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+	unsigned long speed_ccb, temp;
+	u32 pixval;
+
+	speed_ccb = get_bus_freq(0);
+	temp = 1000000000 / pixclock;
+	temp *= 1000;
+	pixval = speed_ccb / temp;
+	debug("DIU pixval = %lu\n", pixval);
+
+	/* Modify PXCLK in GUTS CLKDVDR */
+	temp = in_be32(&gur->clkdvdr) & 0x2000FFFF;
+	out_be32(&gur->clkdvdr, temp);			/* turn off clock */
+	out_be32(&gur->clkdvdr, temp | 0x80000000 | ((pixval & 0x1F) << 16));
+}
+
+int platform_diu_init(unsigned int *xres, unsigned int *yres)
+{
+	ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+	char *monitor_port;
+	u32 pixel_format;
+	u8 temp;
+
+	pixel_format = cpu_to_le32(AD_BYTE_F | (3 << AD_ALPHA_C_SHIFT) |
+		(0 << AD_BLUE_C_SHIFT) | (1 << AD_GREEN_C_SHIFT) |
+		(2 << AD_RED_C_SHIFT) | (8 << AD_COMP_3_SHIFT) |
+		(8 << AD_COMP_2_SHIFT) | (8 << AD_COMP_1_SHIFT) |
+		(8 << AD_COMP_0_SHIFT) | (3 << AD_PIXEL_S_SHIFT));
+
+	temp = in_8(&pixis->brdcfg1);
+
+	monitor_port = getenv("monitor");
+	if (!strncmp(monitor_port, "1", 1)) { /* 1 - Single link LVDS */
+		*xres = 1024;
+		*yres = 768;
+		/* Enable the DFP port, disable the DVI and the backlight */
+		temp &= ~(PX_BRDCFG1_DVIEN | PX_BRDCFG1_BACKLIGHT);
+		temp |= PX_BRDCFG1_DFPEN;
+	} else {	/* DVI */
+		*xres = 1280;
+		*yres = 1024;
+		/* Enable the DVI port, disable the DFP and the backlight */
+		temp &= ~(PX_BRDCFG1_DFPEN | PX_BRDCFG1_BACKLIGHT);
+		temp |= PX_BRDCFG1_DVIEN;
+	}
+
+	out_8(&pixis->brdcfg1, temp);
+
+	/*
+	 * Route the LAD pins to the DIU.  This will disable access to the eLBC,
+	 * which means we won't be able to read/write any NOR flash addresses!
+	 */
+	out_8(&pixis->brdcfg0, in_8(&pixis->brdcfg0) | PX_BRDCFG0_ELBC_DIU);
+	/* we must do the dummy read from eLBC to sync the write as above */
+	in_8(&pixis->brdcfg0);
+
+	/* Setting PMUXCR to switch to DVI from ELBC */
+	/* Set pmuxcr to allow both i2c1 and i2c2 */
+	clrsetbits_be32(&gur->pmuxcr, 0xc0000000, 0x40000000);
+	in_be32(&gur->pmuxcr);
+
+	return fsl_diu_init(*xres, pixel_format, 0);
+}