1 files changed, 182 insertions, 0 deletions

diff --git a/drivers/video/pmag-ba-fb.c b/drivers/video/pmag-ba-fb.c
new file mode 100644
index 000000000000..f8095588e99d
--- /dev/null
+++ b/drivers/video/pmag-ba-fb.c
@@ -0,0 +1,182 @@
+/*
+ *      linux/drivers/video/pmag-ba-fb.c
+ *
+ *      PMAG-BA TurboChannel framebuffer card support ... derived from:
+ *      "HP300 Topcat framebuffer support (derived from macfb of all things)
+ *      Phil Blundell <philb@gnu.org> 1998", the original code can be
+ *      found in the file hpfb.c in the same directory.
+ *
+ *      Based on digital document:
+ *      "PMAG-BA TURBOchannel Color Frame Buffer
+ *       Functional Specification", Revision 1.2, August 27, 1990
+ *
+ *      DECstation related code Copyright (C) 1999, 2000, 2001 by
+ *      Michael Engel <engel@unix-ag.org>, 
+ *      Karsten Merker <merker@linuxtag.org> and
+ *      Harald Koerfgen.
+ *      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/kernel.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/fb.h>
+#include <asm/bootinfo.h>
+#include <asm/dec/machtype.h>
+#include <asm/dec/tc.h>
+#include <video/pmag-ba-fb.h>
+
+struct pmag_ba_ramdac_regs {
+        unsigned char addr_low;
+        unsigned char pad0[3];
+        unsigned char addr_hi;
+        unsigned char pad1[3];
+        unsigned char data;
+        unsigned char pad2[3];
+        unsigned char cmap;
+};
+
+/*
+ * Max 3 TURBOchannel slots -> max 3 PMAG-BA :)
+ */
+static struct fb_info pmagba_fb_info[3];
+
+static struct fb_var_screeninfo pmagbafb_defined = {
+        .xres           = 1024,
+        .yres           = 864,
+        .xres_virtual   = 1024,
+        .yres_virtual   = 864,
+        .bits_per_pixel = 8,
+        .red.length     = 8,
+        .green.length   = 8,
+        .blue.length    = 8,
+        .activate       = FB_ACTIVATE_NOW,
+        .height         = 274,
+        .width          = 195,
+        .accel          = FB_ACCEL_NONE,
+        .vmode          = FB_VMODE_NONINTERLACED,
+};
+
+static struct fb_fix_screeninfo pmagbafb_fix = {
+        .id             = "PMAG-BA",
+        .smem_len       = (1024 * 864),
+        .type           = FB_TYPE_PACKED_PIXELS,
+        .visual         = FB_VISUAL_PSEUDOCOLOR,
+        .line_length    = 1024,
+};
+
+/*
+ * Turn hardware cursor off
+ */
+void pmagbafb_erase_cursor(struct pmag_ba_ramdac_regs *bt459_regs)
+{
+        bt459_regs->addr_low = 0;
+        bt459_regs->addr_hi = 3;
+        bt459_regs->data = 0;
+}
+
+/*
+ * Set the palette. 
+ */
+static int pmagbafb_setcolreg(unsigned regno, unsigned red, unsigned green,
+                              unsigned blue, unsigned transp,
+                              struct fb_info *info)
+{
+        struct pmag_ba_ramdac_regs *bt459_regs = (struct pmag_ba_ramdac_regs *) info->par;
+
+        if (regno >= info->cmap.len)
+                return 1;
+
+        red   >>= 8;    /* The cmap fields are 16 bits    */
+        green >>= 8;    /* wide, but the harware colormap */
+        blue  >>= 8;    /* registers are only 8 bits wide */
+
+        bt459_regs->addr_low = (__u8) regno;
+        bt459_regs->addr_hi = 0;
+        bt459_regs->cmap = red;
+        bt459_regs->cmap = green;
+        bt459_regs->cmap = blue;
+        return 0;
+}
+
+static struct fb_ops pmagbafb_ops = {
+        .owner          = THIS_MODULE,
+        .fb_get_fix     = gen_get_fix,
+        .fb_get_var     = gen_get_var,
+        .fb_setcolreg   = pmagbafb_setcolreg,
+        .fb_fillrect    = cfb_fillrect,
+        .fb_copyarea    = cfb_copyarea,
+        .fb_imageblit   = cfb_imageblit,
+        .fb_cursor      = soft_cursor,
+};
+
+int __init pmagbafb_init_one(int slot)
+{
+        unsigned long base_addr = get_tc_base_addr(slot);
+        struct fb_info *info = &pmagba_fb_info[slot]; 
+        struct display *disp = &pmagba_disp[slot];
+
+        printk("PMAG-BA framebuffer in slot %d\n", slot);
+        /*
+         * Framebuffer display memory base address and friends
+         */
+        pmagbafb_fix.smem_start = base_addr + PMAG_BA_ONBOARD_FBMEM_OFFSET;
+        info->par = (base_addr + PMAG_BA_BT459_OFFSET);
+
+        /*
+         * Configure the Bt459 RAM DAC
+         */
+        pmagbafb_erase_cursor((struct pmag_ba_ramdac_regs *) info->par);
+
+        /*
+         *      Let there be consoles..
+         */
+        info->fbops = &pmagbafb_ops;
+        info->var = pmagbafb_defined;
+        info->fix = pmagbafb_fix; 
+        info->screen_base = pmagbafb_fix.smem_start;
+        info->flags = FBINFO_DEFAULT;
+
+        fb_alloc_cmap(&fb_info.cmap, 256, 0);
+
+        if (register_framebuffer(info) < 0)
+                return 1;
+        return 0;
+}
+
+/* 
+ * Initialise the framebuffer
+ */
+
+int __init pmagbafb_init(void)
+{
+        int sid;
+        int found = 0;
+
+        if (fb_get_options("pmagbafb", NULL))
+                return -ENODEV;
+
+        if (TURBOCHANNEL) {
+                while ((sid = search_tc_card("PMAG-BA")) >= 0) {
+                        found = 1;
+                        claim_tc_card(sid);
+                        pmagbafb_init_one(sid);
+                }
+                return found ? 0 : -ENODEV;
+        } else {
+                return -ENODEV;
+        }
+}
+
+module_init(pmagbafb_init);
+MODULE_LICENSE("GPL");