Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 323 insertions, 0 deletions

diff --git a/drivers/video/fbdev/fm2fb.c b/drivers/video/fbdev/fm2fb.c
new file mode 100644
index 000000000..3b727d528
--- /dev/null
+++ b/drivers/video/fbdev/fm2fb.c
@@ -0,0 +1,323 @@
+/*
+ *  linux/drivers/video/fm2fb.c -- BSC FrameMaster II/Rainbow II frame buffer
+ *				   device
+ *
+ *	Copyright (C) 1998 Steffen A. Mork (linux-dev@morknet.de)
+ *	Copyright (C) 1999 Geert Uytterhoeven
+ *
+ *  Written for 2.0.x by Steffen A. Mork
+ *  Ported to 2.1.x by Geert Uytterhoeven
+ *  Ported to new api by James Simmons
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License. See the file COPYING in the main directory of this archive for
+ *  more details.
+ */
+
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/zorro.h>
+#include <asm/io.h>
+
+/*
+ *	Some technical notes:
+ *
+ *	The BSC FrameMaster II (or Rainbow II) is a simple very dumb
+ *	frame buffer which allows to display 24 bit true color images.
+ *	Each pixel is 32 bit width so it's very easy to maintain the
+ *	frame buffer. One long word has the following layout:
+ *	AARRGGBB which means: AA the alpha channel byte, RR the red
+ *	channel, GG the green channel and BB the blue channel.
+ *
+ *	The FrameMaster II supports the following video modes.
+ *	- PAL/NTSC
+ *	- interlaced/non interlaced
+ *	- composite sync/sync/sync over green
+ *
+ *	The resolution is to the following both ones:
+ *	- 768x576 (PAL)
+ *	- 768x480 (NTSC)
+ *
+ *	This means that pixel access per line is fixed due to the
+ *	fixed line width. In case of maximal resolution the frame
+ *	buffer needs an amount of memory of 1.769.472 bytes which
+ *	is near to 2 MByte (the allocated address space of Zorro2).
+ *	The memory is channel interleaved. That means every channel
+ *	owns four VRAMs. Unfortunately most FrameMasters II are
+ *	not assembled with memory for the alpha channel. In this
+ *	case it could be possible to add the frame buffer into the
+ *	normal memory pool.
+ *
+ *	At relative address 0x1ffff8 of the frame buffers base address
+ *	there exists a control register with the number of
+ *	four control bits. They have the following meaning:
+ *	bit value meaning
+ *
+ *	 0    1   0=interlaced/1=non interlaced
+ *	 1    2   0=video out disabled/1=video out enabled
+ *	 2    4   0=normal mode as jumpered via JP8/1=complement mode
+ *	 3    8   0=read  onboard ROM/1 normal operation (required)
+ *
+ *	As mentioned above there are several jumper. I think there
+ *	is not very much information about the FrameMaster II in
+ *	the world so I add these information for completeness.
+ *
+ *	JP1  interlace selection (1-2 non interlaced/2-3 interlaced)
+ *	JP2  wait state creation (leave as is!)
+ *	JP3  wait state creation (leave as is!)
+ *	JP4  modulate composite sync on green output (1-2 composite
+ *	     sync on green channel/2-3 normal composite sync)
+ *	JP5  create test signal, shorting this jumper will create
+ *	     a white screen
+ *	JP6  sync creation (1-2 composite sync/2-3 H-sync output)
+ *	JP8  video mode (1-2 PAL/2-3 NTSC)
+ *
+ *	With the following jumpering table you can connect the
+ *	FrameMaster II to a normal TV via SCART connector:
+ *	JP1:  2-3
+ *	JP4:  2-3
+ *	JP6:  2-3
+ *	JP8:  1-2 (means PAL for Europe)
+ *
+ *	NOTE:
+ *	There is no other possibility to change the video timings
+ *	except the interlaced/non interlaced, sync control and the
+ *	video mode PAL (50 Hz)/NTSC (60 Hz). Inside this
+ *	FrameMaster II driver are assumed values to avoid anomalies
+ *	to a future X server. Except the pixel clock is really
+ *	constant at 30 MHz.
+ *
+ *	9 pin female video connector:
+ *
+ *	1  analog red 0.7 Vss
+ *	2  analog green 0.7 Vss
+ *	3  analog blue 0.7 Vss
+ *	4  H-sync TTL
+ *	5  V-sync TTL
+ *	6  ground
+ *	7  ground
+ *	8  ground
+ *	9  ground
+ *
+ *	Some performance notes:
+ *	The FrameMaster II was not designed to display a console
+ *	this driver would do! It was designed to display still true
+ *	color images. Imagine: When scroll up a text line there
+ *	must copied ca. 1.7 MBytes to another place inside this
+ *	frame buffer. This means 1.7 MByte read and 1.7 MByte write
+ *	over the slow 16 bit wide Zorro2 bus! A scroll of one
+ *	line needs 1 second so do not expect to much from this
+ *	driver - he is at the limit!
+ *
+ */
+
+/*
+ *	definitions
+ */
+
+#define FRAMEMASTER_SIZE	0x200000
+#define FRAMEMASTER_REG		0x1ffff8
+
+#define FRAMEMASTER_NOLACE	1
+#define FRAMEMASTER_ENABLE	2
+#define FRAMEMASTER_COMPL	4
+#define FRAMEMASTER_ROM		8
+
+static volatile unsigned char *fm2fb_reg;
+
+static struct fb_fix_screeninfo fb_fix = {
+	.smem_len =	FRAMEMASTER_REG,
+	.type =		FB_TYPE_PACKED_PIXELS,
+	.visual =	FB_VISUAL_TRUECOLOR,
+	.line_length =	(768 << 2),
+	.mmio_len =	(8),
+	.accel =	FB_ACCEL_NONE,
+};
+
+static int fm2fb_mode = -1;
+
+#define FM2FB_MODE_PAL	0
+#define FM2FB_MODE_NTSC	1
+
+static struct fb_var_screeninfo fb_var_modes[] = {
+    {
+	/* 768 x 576, 32 bpp (PAL) */
+	768, 576, 768, 576, 0, 0, 32, 0,
+	{ 16, 8, 0 }, { 8, 8, 0 }, { 0, 8, 0 }, { 24, 8, 0 },
+	0, FB_ACTIVATE_NOW, -1, -1, FB_ACCEL_NONE,
+	33333, 10, 102, 10, 5, 80, 34, FB_SYNC_COMP_HIGH_ACT, 0
+    }, {
+	/* 768 x 480, 32 bpp (NTSC - not supported yet */
+	768, 480, 768, 480, 0, 0, 32, 0,
+	{ 16, 8, 0 }, { 8, 8, 0 }, { 0, 8, 0 }, { 24, 8, 0 },
+	0, FB_ACTIVATE_NOW, -1, -1, FB_ACCEL_NONE,
+	33333, 10, 102, 10, 5, 80, 34, FB_SYNC_COMP_HIGH_ACT, 0
+    }
+};
+
+    /*
+     *  Interface used by the world
+     */
+
+static int fm2fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+                           u_int transp, struct fb_info *info);
+static int fm2fb_blank(int blank, struct fb_info *info);
+
+static const struct fb_ops fm2fb_ops = {
+	.owner		= THIS_MODULE,
+	.fb_setcolreg	= fm2fb_setcolreg,
+	.fb_blank	= fm2fb_blank,
+	.fb_fillrect	= cfb_fillrect,
+	.fb_copyarea	= cfb_copyarea,
+	.fb_imageblit	= cfb_imageblit,
+};
+
+    /*
+     *  Blank the display.
+     */
+static int fm2fb_blank(int blank, struct fb_info *info)
+{
+	unsigned char t = FRAMEMASTER_ROM;
+
+	if (!blank)
+		t |= FRAMEMASTER_ENABLE | FRAMEMASTER_NOLACE;
+	fm2fb_reg[0] = t;
+	return 0;
+}
+
+    /*
+     *  Set a single color register. The values supplied are already
+     *  rounded down to the hardware's capabilities (according to the
+     *  entries in the var structure). Return != 0 for invalid regno.
+     */
+static int fm2fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+                         u_int transp, struct fb_info *info)
+{
+	if (regno < 16) {
+		red >>= 8;
+		green >>= 8;
+		blue >>= 8;
+
+		((u32*)(info->pseudo_palette))[regno] = (red << 16) |
+			(green << 8) | blue;
+	}
+
+	return 0;
+}
+
+    /*
+     *  Initialisation
+     */
+
+static int fm2fb_probe(struct zorro_dev *z, const struct zorro_device_id *id);
+
+static const struct zorro_device_id fm2fb_devices[] = {
+	{ ZORRO_PROD_BSC_FRAMEMASTER_II },
+	{ ZORRO_PROD_HELFRICH_RAINBOW_II },
+	{ 0 }
+};
+MODULE_DEVICE_TABLE(zorro, fm2fb_devices);
+
+static struct zorro_driver fm2fb_driver = {
+	.name		= "fm2fb",
+	.id_table	= fm2fb_devices,
+	.probe		= fm2fb_probe,
+};
+
+static int fm2fb_probe(struct zorro_dev *z, const struct zorro_device_id *id)
+{
+	struct fb_info *info;
+	unsigned long *ptr;
+	int is_fm;
+	int x, y;
+
+	is_fm = z->id == ZORRO_PROD_BSC_FRAMEMASTER_II;
+
+	if (!zorro_request_device(z,"fm2fb"))
+		return -ENXIO;
+
+	info = framebuffer_alloc(16 * sizeof(u32), &z->dev);
+	if (!info) {
+		zorro_release_device(z);
+		return -ENOMEM;
+	}
+
+	if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
+		framebuffer_release(info);
+		zorro_release_device(z);
+		return -ENOMEM;
+	}
+
+	/* assigning memory to kernel space */
+	fb_fix.smem_start = zorro_resource_start(z);
+	info->screen_base = ioremap(fb_fix.smem_start, FRAMEMASTER_SIZE);
+	fb_fix.mmio_start = fb_fix.smem_start + FRAMEMASTER_REG;
+	fm2fb_reg  = (unsigned char *)(info->screen_base+FRAMEMASTER_REG);
+
+	strcpy(fb_fix.id, is_fm ? "FrameMaster II" : "Rainbow II");
+
+	/* make EBU color bars on display */
+	ptr = (unsigned long *)fb_fix.smem_start;
+	for (y = 0; y < 576; y++) {
+		for (x = 0; x < 96; x++) *ptr++ = 0xffffff;/* white */
+		for (x = 0; x < 96; x++) *ptr++ = 0xffff00;/* yellow */
+		for (x = 0; x < 96; x++) *ptr++ = 0x00ffff;/* cyan */
+		for (x = 0; x < 96; x++) *ptr++ = 0x00ff00;/* green */
+		for (x = 0; x < 96; x++) *ptr++ = 0xff00ff;/* magenta */
+		for (x = 0; x < 96; x++) *ptr++ = 0xff0000;/* red */
+		for (x = 0; x < 96; x++) *ptr++ = 0x0000ff;/* blue */
+		for (x = 0; x < 96; x++) *ptr++ = 0x000000;/* black */
+	}
+	fm2fb_blank(0, info);
+
+	if (fm2fb_mode == -1)
+		fm2fb_mode = FM2FB_MODE_PAL;
+
+	info->fbops = &fm2fb_ops;
+	info->var = fb_var_modes[fm2fb_mode];
+	info->pseudo_palette = info->par;
+	info->par = NULL;
+	info->fix = fb_fix;
+	info->flags = FBINFO_DEFAULT;
+
+	if (register_framebuffer(info) < 0) {
+		fb_dealloc_cmap(&info->cmap);
+		iounmap(info->screen_base);
+		framebuffer_release(info);
+		zorro_release_device(z);
+		return -EINVAL;
+	}
+	fb_info(info, "%s frame buffer device\n", fb_fix.id);
+	return 0;
+}
+
+int __init fm2fb_setup(char *options)
+{
+	char *this_opt;
+
+	if (!options || !*options)
+		return 0;
+
+	while ((this_opt = strsep(&options, ",")) != NULL) {
+		if (!strncmp(this_opt, "pal", 3))
+			fm2fb_mode = FM2FB_MODE_PAL;
+		else if (!strncmp(this_opt, "ntsc", 4))
+			fm2fb_mode = FM2FB_MODE_NTSC;
+	}
+	return 0;
+}
+
+int __init fm2fb_init(void)
+{
+	char *option = NULL;
+
+	if (fb_get_options("fm2fb", &option))
+		return -ENODEV;
+	fm2fb_setup(option);
+	return zorro_register_driver(&fm2fb_driver);
+}
+
+module_init(fm2fb_init);
+MODULE_LICENSE("GPL");