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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 6/6] xen/arm: introduce a driver for the ARM HDLCD controller
For the moment the resolution is hardcoded to 1280x1024@60.
Use the generic framebuffer functions to print on the screen.
Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
---
xen/arch/arm/Rules.mk | 1 +
xen/drivers/video/Makefile | 1 +
xen/drivers/video/arm_hdlcd.c | 165 +++++++++++++++++++++++++++++++++++++++++
xen/include/asm-arm/config.h | 3 +
4 files changed, 170 insertions(+), 0 deletions(-)
create mode 100644 xen/drivers/video/arm_hdlcd.c
diff --git a/xen/arch/arm/Rules.mk b/xen/arch/arm/Rules.mk
index fa9f9c1..9580e6b 100644
--- a/xen/arch/arm/Rules.mk
+++ b/xen/arch/arm/Rules.mk
@@ -8,6 +8,7 @@
HAS_DEVICE_TREE := y
HAS_VIDEO := y
+HAS_ARM_HDLCD := y
CFLAGS += -fno-builtin -fno-common -Wredundant-decls
CFLAGS += -iwithprefix include -Werror -Wno-pointer-arith -pipe
diff --git a/xen/drivers/video/Makefile b/xen/drivers/video/Makefile
index 3b3eb43..8a6f5da 100644
--- a/xen/drivers/video/Makefile
+++ b/xen/drivers/video/Makefile
@@ -4,3 +4,4 @@ obj-$(HAS_VIDEO) += font_8x16.o
obj-$(HAS_VIDEO) += font_8x8.o
obj-$(HAS_VIDEO) += fb.o
obj-$(HAS_VGA) += vesa.o
+obj-$(HAS_ARM_HDLCD) += arm_hdlcd.o
diff --git a/xen/drivers/video/arm_hdlcd.c b/xen/drivers/video/arm_hdlcd.c
new file mode 100644
index 0000000..68f588c
--- /dev/null
+++ b/xen/drivers/video/arm_hdlcd.c
@@ -0,0 +1,165 @@
+/*
+ * xen/drivers/video/arm_hdlcd.c
+ *
+ * Driver for ARM HDLCD Controller
+ *
+ * Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
+ * Copyright (c) 2012 Citrix Systems.
+ *
+ * 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <asm/delay.h>
+#include <asm/types.h>
+#include <xen/config.h>
+#include <xen/device_tree.h>
+#include <xen/libfdt/libfdt.h>
+#include <xen/init.h>
+#include <xen/mm.h>
+#include "font.h"
+#include "fb.h"
+
+#define HDLCD ((volatile uint32_t *) FIXMAP_ADDR(FIXMAP_MISC))
+
+#define HDLCD_INTMASK (0x18/4)
+#define HDLCD_FBBASE (0x100/4)
+#define HDLCD_LINELENGTH (0x104/4)
+#define HDLCD_LINECOUNT (0x108/4)
+#define HDLCD_LINEPITCH (0x10C/4)
+#define HDLCD_BUS (0x110/4)
+#define HDLCD_VSYNC (0x200/4)
+#define HDLCD_VBACK (0x204/4)
+#define HDLCD_VDATA (0x208/4)
+#define HDLCD_VFRONT (0x20C/4)
+#define HDLCD_HSYNC (0x210/4)
+#define HDLCD_HBACK (0x214/4)
+#define HDLCD_HDATA (0x218/4)
+#define HDLCD_HFRONT (0x21C/4)
+#define HDLCD_POLARITIES (0x220/4)
+#define HDLCD_COMMAND (0x230/4)
+#define HDLCD_PF (0x240/4)
+#define HDLCD_RED (0x244/4)
+#define HDLCD_GREEN (0x248/4)
+#define HDLCD_BLUE (0x24C/4)
+
+#define BPP 4
+#define XRES 1280
+#define YRES 1024
+#define refresh 60
+#define pixclock 108 /* in Mhz, needs to be set in the board config for
OSC5 */
+#define left_margin 80
+#define hback left_margin
+#define right_margin 48
+#define hfront right_margin
+#define upper_margin 21
+#define vback upper_margin
+#define lower_margin 3
+#define vfront lower_margin
+#define hsync_len 32
+#define vsync_len 6
+
+#define HDLCD_SIZE (XRES*YRES*BPP)
+
+static void vga_noop_puts(const char *s) {}
+void (*video_puts)(const char *) = vga_noop_puts;
+
+static void hdlcd_flush(void)
+{
+ dsb();
+}
+
+void __init video_init(void)
+{
+ int node, depth;
+ u32 address_cells, size_cells;
+ struct fb_prop fbp;
+ unsigned char *lfb = (unsigned char *) VRAM_VIRT_START;
+ paddr_t hdlcd_start, hdlcd_size;
+ paddr_t framebuffer_start, framebuffer_size;
+ const struct fdt_property *prop;
+ const u32 *cell;
+
+ if ( find_compatible_node("arm,hdlcd", &node, &depth,
+ &address_cells, &size_cells) <= 0 )
+ return;
+
+ prop = fdt_get_property(device_tree_flattened, node, "reg", NULL);
+ if ( !prop )
+ return;
+
+ cell = (const u32 *)prop->data;
+ device_tree_get_reg(&cell, address_cells, size_cells,
+ &hdlcd_start, &hdlcd_size);
+
+ prop = fdt_get_property(device_tree_flattened, node, "framebuffer", NULL);
+ if ( !prop )
+ return;
+
+ cell = (const u32 *)prop->data;
+ device_tree_get_reg(&cell, address_cells, size_cells,
+ &framebuffer_start, &framebuffer_size);
+
+ if ( !hdlcd_start || !framebuffer_start )
+ return;
+
+ printk("Initializing HDLCD driver\n");
+
+ map_phys_range(framebuffer_start,
+ framebuffer_start + framebuffer_size,
+ VRAM_VIRT_START, DEV_WC);
+ memset(lfb, 0x00, HDLCD_SIZE);
+
+ set_fixmap(FIXMAP_MISC, hdlcd_start >> PAGE_SHIFT, DEV_SHARED);
+ HDLCD[HDLCD_COMMAND] = 0;
+
+ HDLCD[HDLCD_LINELENGTH] = XRES * BPP;
+ HDLCD[HDLCD_LINECOUNT] = YRES - 1;
+ HDLCD[HDLCD_LINEPITCH] = XRES * BPP;
+ HDLCD[HDLCD_PF] = ((BPP - 1) << 3);
+ HDLCD[HDLCD_INTMASK] = 0;
+ HDLCD[HDLCD_FBBASE] = framebuffer_start;
+ HDLCD[HDLCD_BUS] = 0xf00|(1<<4);
+ HDLCD[HDLCD_VBACK] = upper_margin - 1;
+ HDLCD[HDLCD_VSYNC] = vsync_len - 1;
+ HDLCD[HDLCD_VDATA] = YRES - 1;
+ HDLCD[HDLCD_VFRONT] = lower_margin - 1;
+ HDLCD[HDLCD_HBACK] = left_margin - 1;
+ HDLCD[HDLCD_HSYNC] = hsync_len - 1;
+ HDLCD[HDLCD_HDATA] = XRES - 1;
+ HDLCD[HDLCD_HFRONT] = right_margin - 1;
+ HDLCD[HDLCD_POLARITIES] = (1<<2)|(1<<3);
+ HDLCD[HDLCD_RED] = (8<<8)|0;
+ HDLCD[HDLCD_GREEN] = (8<<8)|8;
+ HDLCD[HDLCD_BLUE] = (8<<8)|16;
+
+ HDLCD[HDLCD_COMMAND] = 1;
+ clear_fixmap(FIXMAP_MISC);
+
+ fbp.lfb = lfb;
+ fbp.font = &font_vga_8x16;
+ fbp.pixel_on = 0xffffff;
+ fbp.bits_per_pixel = BPP*8;
+ fbp.bytes_per_line = BPP*XRES;
+ fbp.width = XRES;
+ fbp.height = YRES;
+ fbp.flush = hdlcd_flush;
+ fbp.text_columns = XRES / 8;
+ fbp.text_rows = YRES / 16;
+ if ( fb_init(fbp) < 0 )
+ return;
+ video_puts = fb_scroll_puts;
+}
+
+void video_endboot(void)
+{
+ if ( video_puts != vga_noop_puts )
+ fb_alloc();
+}
diff --git a/xen/include/asm-arm/config.h b/xen/include/asm-arm/config.h
index 2a05539..9727562 100644
--- a/xen/include/asm-arm/config.h
+++ b/xen/include/asm-arm/config.h
@@ -19,6 +19,8 @@
#define CONFIG_DOMAIN_PAGE 1
+#define CONFIG_VIDEO 1
+
#define OPT_CONSOLE_STR "com1"
#ifdef MAX_PHYS_CPUS
@@ -73,6 +75,7 @@
#define FIXMAP_ADDR(n) (mk_unsigned_long(0x00400000) + (n) * PAGE_SIZE)
#define BOOT_MISC_VIRT_START mk_unsigned_long(0x00600000)
#define FRAMETABLE_VIRT_START mk_unsigned_long(0x02000000)
+#define VRAM_VIRT_START mk_unsigned_long(0x10000000)
#define XENHEAP_VIRT_START mk_unsigned_long(0x40000000)
#define DOMHEAP_VIRT_START mk_unsigned_long(0x80000000)
--
1.7.2.5
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