1 files changed, 322 insertions, 0 deletions

diff --git a/drivers/video/fm2fb.c b/drivers/video/fm2fb.c
new file mode 100644
index 000000000000..a0763283d776
--- /dev/null
+++ b/drivers/video/fm2fb.c
@@ -0,0 +1,322 @@
+/*
+ *  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. Unfortunatly 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 __devinitdata = {
+        .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 __devinitdata = -1;
+
+#define FM2FB_MODE_PAL  0
+#define FM2FB_MODE_NTSC 1
+
+static struct fb_var_screeninfo fb_var_modes[] __devinitdata = {
+    {
+        /* 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 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,
+        .fb_cursor      = soft_cursor,
+};
+
+    /*
+     *  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 > info->cmap.len)
+                return 1;
+        red >>= 8;
+        green >>= 8;
+        blue >>= 8;
+
+        ((u32*)(info->pseudo_palette))[regno] = (red << 16) | (green << 8) | blue;
+        return 0;
+}
+
+    /*
+     *  Initialisation
+     */
+
+static int __devinit fm2fb_probe(struct zorro_dev *z,
+                                 const struct zorro_device_id *id);
+
+static struct zorro_device_id fm2fb_devices[] __devinitdata = {
+        { ZORRO_PROD_BSC_FRAMEMASTER_II },
+        { ZORRO_PROD_HELFRICH_RAINBOW_II },
+        { 0 }
+};
+
+static struct zorro_driver fm2fb_driver = {
+        .name           = "fm2fb",
+        .id_table       = fm2fb_devices,
+        .probe          = fm2fb_probe,
+};
+
+static int __devinit 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(256 * 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);
+                framebuffer_release(info);
+                zorro_release_device(z);
+                return -EINVAL;
+        }
+        printk("fb%d: %s frame buffer device\n", info->node, 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");