v4.19.13 snapshot.
diff --git a/drivers/video/fbdev/atafb.c b/drivers/video/fbdev/atafb.c
new file mode 100644
index 0000000..fcd2dd6
--- /dev/null
+++ b/drivers/video/fbdev/atafb.c
@@ -0,0 +1,3264 @@
+/*
+ * linux/drivers/video/atafb.c -- Atari builtin chipset frame buffer device
+ *
+ * Copyright (C) 1994 Martin Schaller & Roman Hodek
+ *
+ * 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.
+ *
+ * History:
+ * - 03 Jan 95: Original version by Martin Schaller: The TT driver and
+ * all the device independent stuff
+ * - 09 Jan 95: Roman: I've added the hardware abstraction (hw_switch)
+ * and wrote the Falcon, ST(E), and External drivers
+ * based on the original TT driver.
+ * - 07 May 95: Martin: Added colormap operations for the external driver
+ * - 21 May 95: Martin: Added support for overscan
+ * Andreas: some bug fixes for this
+ * - Jul 95: Guenther Kelleter <guenther@pool.informatik.rwth-aachen.de>:
+ * Programmable Falcon video modes
+ * (thanks to Christian Cartus for documentation
+ * of VIDEL registers).
+ * - 27 Dec 95: Guenther: Implemented user definable video modes "user[0-7]"
+ * on minor 24...31. "user0" may be set on commandline by
+ * "R<x>;<y>;<depth>". (Makes sense only on Falcon)
+ * Video mode switch on Falcon now done at next VBL interrupt
+ * to avoid the annoying right shift of the screen.
+ * - 23 Sep 97: Juergen: added xres_virtual for cards like ProMST
+ * The external-part is legacy, therefore hardware-specific
+ * functions like panning/hardwarescrolling/blanking isn't
+ * supported.
+ * - 29 Sep 97: Juergen: added Romans suggestion for pan_display
+ * (var->xoffset was changed even if no set_screen_base avail.)
+ * - 05 Oct 97: Juergen: extfb (PACKED_PIXEL) is FB_PSEUDOCOLOR 'cause
+ * we know how to set the colors
+ * ext_*palette: read from ext_colors (former MV300_colors)
+ * write to ext_colors and RAMDAC
+ *
+ * To do:
+ * - For the Falcon it is not possible to set random video modes on
+ * SM124 and SC/TV, only the bootup resolution is supported.
+ *
+ */
+
+#define ATAFB_TT
+#define ATAFB_STE
+#define ATAFB_EXT
+#define ATAFB_FALCON
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+
+#include <asm/setup.h>
+#include <linux/uaccess.h>
+#include <asm/pgtable.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+
+#include <asm/atarihw.h>
+#include <asm/atariints.h>
+#include <asm/atari_stram.h>
+
+#include <linux/fb.h>
+#include <asm/atarikb.h>
+
+#include "c2p.h"
+#include "atafb.h"
+
+#define SWITCH_ACIA 0x01 /* modes for switch on OverScan */
+#define SWITCH_SND6 0x40
+#define SWITCH_SND7 0x80
+#define SWITCH_NONE 0x00
+
+
+#define up(x, r) (((x) + (r) - 1) & ~((r)-1))
+
+ /*
+ * Interface to the world
+ */
+
+static int atafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info);
+static int atafb_set_par(struct fb_info *info);
+static int atafb_setcolreg(unsigned int regno, unsigned int red, unsigned int green,
+ unsigned int blue, unsigned int transp,
+ struct fb_info *info);
+static int atafb_blank(int blank, struct fb_info *info);
+static int atafb_pan_display(struct fb_var_screeninfo *var,
+ struct fb_info *info);
+static void atafb_fillrect(struct fb_info *info,
+ const struct fb_fillrect *rect);
+static void atafb_copyarea(struct fb_info *info,
+ const struct fb_copyarea *region);
+static void atafb_imageblit(struct fb_info *info, const struct fb_image *image);
+static int atafb_ioctl(struct fb_info *info, unsigned int cmd,
+ unsigned long arg);
+
+
+static int default_par; /* default resolution (0=none) */
+
+static unsigned long default_mem_req;
+
+static int hwscroll = -1;
+
+static int use_hwscroll = 1;
+
+static int sttt_xres = 640, st_yres = 400, tt_yres = 480;
+static int sttt_xres_virtual = 640, sttt_yres_virtual = 400;
+static int ovsc_offset, ovsc_addlen;
+
+ /*
+ * Hardware parameters for current mode
+ */
+
+static struct atafb_par {
+ void *screen_base;
+ int yres_virtual;
+ u_long next_line;
+#if defined ATAFB_TT || defined ATAFB_STE
+ union {
+ struct {
+ int mode;
+ int sync;
+ } tt, st;
+#endif
+#ifdef ATAFB_FALCON
+ struct falcon_hw {
+ /* Here are fields for storing a video mode, as direct
+ * parameters for the hardware.
+ */
+ short sync;
+ short line_width;
+ short line_offset;
+ short st_shift;
+ short f_shift;
+ short vid_control;
+ short vid_mode;
+ short xoffset;
+ short hht, hbb, hbe, hdb, hde, hss;
+ short vft, vbb, vbe, vdb, vde, vss;
+ /* auxiliary information */
+ short mono;
+ short ste_mode;
+ short bpp;
+ u32 pseudo_palette[16];
+ } falcon;
+#endif
+ /* Nothing needed for external mode */
+ } hw;
+} current_par;
+
+/* Don't calculate an own resolution, and thus don't change the one found when
+ * booting (currently used for the Falcon to keep settings for internal video
+ * hardware extensions (e.g. ScreenBlaster) */
+static int DontCalcRes = 0;
+
+#ifdef ATAFB_FALCON
+#define HHT hw.falcon.hht
+#define HBB hw.falcon.hbb
+#define HBE hw.falcon.hbe
+#define HDB hw.falcon.hdb
+#define HDE hw.falcon.hde
+#define HSS hw.falcon.hss
+#define VFT hw.falcon.vft
+#define VBB hw.falcon.vbb
+#define VBE hw.falcon.vbe
+#define VDB hw.falcon.vdb
+#define VDE hw.falcon.vde
+#define VSS hw.falcon.vss
+#define VCO_CLOCK25 0x04
+#define VCO_CSYPOS 0x10
+#define VCO_VSYPOS 0x20
+#define VCO_HSYPOS 0x40
+#define VCO_SHORTOFFS 0x100
+#define VMO_DOUBLE 0x01
+#define VMO_INTER 0x02
+#define VMO_PREMASK 0x0c
+#endif
+
+static struct fb_info fb_info = {
+ .fix = {
+ .id = "Atari ",
+ .visual = FB_VISUAL_PSEUDOCOLOR,
+ .accel = FB_ACCEL_NONE,
+ }
+};
+
+static void *screen_base; /* base address of screen */
+static unsigned long phys_screen_base; /* (only for Overscan) */
+
+static int screen_len;
+
+static int current_par_valid;
+
+static int mono_moni;
+
+
+#ifdef ATAFB_EXT
+
+/* external video handling */
+static unsigned int external_xres;
+static unsigned int external_xres_virtual;
+static unsigned int external_yres;
+
+/*
+ * not needed - atafb will never support panning/hardwarescroll with external
+ * static unsigned int external_yres_virtual;
+ */
+static unsigned int external_depth;
+static int external_pmode;
+static void *external_screen_base;
+static unsigned long external_addr;
+static unsigned long external_len;
+static unsigned long external_vgaiobase;
+static unsigned int external_bitspercol = 6;
+
+/*
+ * JOE <joe@amber.dinoco.de>:
+ * added card type for external driver, is only needed for
+ * colormap handling.
+ */
+enum cardtype { IS_VGA, IS_MV300 };
+static enum cardtype external_card_type = IS_VGA;
+
+/*
+ * The MV300 mixes the color registers. So we need an array of munged
+ * indices in order to access the correct reg.
+ */
+static int MV300_reg_1bit[2] = {
+ 0, 1
+};
+static int MV300_reg_4bit[16] = {
+ 0, 8, 4, 12, 2, 10, 6, 14, 1, 9, 5, 13, 3, 11, 7, 15
+};
+static int MV300_reg_8bit[256] = {
+ 0, 128, 64, 192, 32, 160, 96, 224, 16, 144, 80, 208, 48, 176, 112, 240,
+ 8, 136, 72, 200, 40, 168, 104, 232, 24, 152, 88, 216, 56, 184, 120, 248,
+ 4, 132, 68, 196, 36, 164, 100, 228, 20, 148, 84, 212, 52, 180, 116, 244,
+ 12, 140, 76, 204, 44, 172, 108, 236, 28, 156, 92, 220, 60, 188, 124, 252,
+ 2, 130, 66, 194, 34, 162, 98, 226, 18, 146, 82, 210, 50, 178, 114, 242,
+ 10, 138, 74, 202, 42, 170, 106, 234, 26, 154, 90, 218, 58, 186, 122, 250,
+ 6, 134, 70, 198, 38, 166, 102, 230, 22, 150, 86, 214, 54, 182, 118, 246,
+ 14, 142, 78, 206, 46, 174, 110, 238, 30, 158, 94, 222, 62, 190, 126, 254,
+ 1, 129, 65, 193, 33, 161, 97, 225, 17, 145, 81, 209, 49, 177, 113, 241,
+ 9, 137, 73, 201, 41, 169, 105, 233, 25, 153, 89, 217, 57, 185, 121, 249,
+ 5, 133, 69, 197, 37, 165, 101, 229, 21, 149, 85, 213, 53, 181, 117, 245,
+ 13, 141, 77, 205, 45, 173, 109, 237, 29, 157, 93, 221, 61, 189, 125, 253,
+ 3, 131, 67, 195, 35, 163, 99, 227, 19, 147, 83, 211, 51, 179, 115, 243,
+ 11, 139, 75, 203, 43, 171, 107, 235, 27, 155, 91, 219, 59, 187, 123, 251,
+ 7, 135, 71, 199, 39, 167, 103, 231, 23, 151, 87, 215, 55, 183, 119, 247,
+ 15, 143, 79, 207, 47, 175, 111, 239, 31, 159, 95, 223, 63, 191, 127, 255
+};
+
+static int *MV300_reg = MV300_reg_8bit;
+#endif /* ATAFB_EXT */
+
+
+static int inverse;
+
+extern int fontheight_8x8;
+extern int fontwidth_8x8;
+extern unsigned char fontdata_8x8[];
+
+extern int fontheight_8x16;
+extern int fontwidth_8x16;
+extern unsigned char fontdata_8x16[];
+
+/*
+ * struct fb_ops {
+ * * open/release and usage marking
+ * struct module *owner;
+ * int (*fb_open)(struct fb_info *info, int user);
+ * int (*fb_release)(struct fb_info *info, int user);
+ *
+ * * For framebuffers with strange non linear layouts or that do not
+ * * work with normal memory mapped access
+ * ssize_t (*fb_read)(struct file *file, char __user *buf, size_t count, loff_t *ppos);
+ * ssize_t (*fb_write)(struct file *file, const char __user *buf, size_t count, loff_t *ppos);
+ *
+ * * checks var and eventually tweaks it to something supported,
+ * * DOES NOT MODIFY PAR *
+ * int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info);
+ *
+ * * set the video mode according to info->var *
+ * int (*fb_set_par)(struct fb_info *info);
+ *
+ * * set color register *
+ * int (*fb_setcolreg)(unsigned int regno, unsigned int red, unsigned int green,
+ * unsigned int blue, unsigned int transp, struct fb_info *info);
+ *
+ * * set color registers in batch *
+ * int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info);
+ *
+ * * blank display *
+ * int (*fb_blank)(int blank, struct fb_info *info);
+ *
+ * * pan display *
+ * int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info);
+ *
+ * *** The meat of the drawing engine ***
+ * * Draws a rectangle *
+ * void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect);
+ * * Copy data from area to another *
+ * void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region);
+ * * Draws a image to the display *
+ * void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image);
+ *
+ * * Draws cursor *
+ * int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor);
+ *
+ * * wait for blit idle, optional *
+ * int (*fb_sync)(struct fb_info *info);
+ *
+ * * perform fb specific ioctl (optional) *
+ * int (*fb_ioctl)(struct fb_info *info, unsigned int cmd,
+ * unsigned long arg);
+ *
+ * * Handle 32bit compat ioctl (optional) *
+ * int (*fb_compat_ioctl)(struct fb_info *info, unsigned int cmd,
+ * unsigned long arg);
+ *
+ * * perform fb specific mmap *
+ * int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma);
+ * } ;
+ */
+
+
+/* ++roman: This structure abstracts from the underlying hardware (ST(e),
+ * TT, or Falcon.
+ *
+ * int (*detect)(void)
+ * This function should detect the current video mode settings and
+ * store them in atafb_predefined[0] for later reference by the
+ * user. Return the index+1 of an equivalent predefined mode or 0
+ * if there is no such.
+ *
+ * int (*encode_fix)(struct fb_fix_screeninfo *fix,
+ * struct atafb_par *par)
+ * This function should fill in the 'fix' structure based on the
+ * values in the 'par' structure.
+ * !!! Obsolete, perhaps !!!
+ *
+ * int (*decode_var)(struct fb_var_screeninfo *var,
+ * struct atafb_par *par)
+ * Get the video params out of 'var'. If a value doesn't fit, round
+ * it up, if it's too big, return EINVAL.
+ * Round up in the following order: bits_per_pixel, xres, yres,
+ * xres_virtual, yres_virtual, xoffset, yoffset, grayscale, bitfields,
+ * horizontal timing, vertical timing.
+ *
+ * int (*encode_var)(struct fb_var_screeninfo *var,
+ * struct atafb_par *par);
+ * Fill the 'var' structure based on the values in 'par' and maybe
+ * other values read out of the hardware.
+ *
+ * void (*get_par)(struct atafb_par *par)
+ * Fill the hardware's 'par' structure.
+ * !!! Used only by detect() !!!
+ *
+ * void (*set_par)(struct atafb_par *par)
+ * Set the hardware according to 'par'.
+ *
+ * void (*set_screen_base)(void *s_base)
+ * Set the base address of the displayed frame buffer. Only called
+ * if yres_virtual > yres or xres_virtual > xres.
+ *
+ * int (*blank)(int blank_mode)
+ * Blank the screen if blank_mode != 0, else unblank. If blank == NULL then
+ * the caller blanks by setting the CLUT to all black. Return 0 if blanking
+ * succeeded, !=0 if un-/blanking failed due to e.g. a video mode which
+ * doesn't support it. Implements VESA suspend and powerdown modes on
+ * hardware that supports disabling hsync/vsync:
+ * blank_mode == 2: suspend vsync, 3:suspend hsync, 4: powerdown.
+ */
+
+static struct fb_hwswitch {
+ int (*detect)(void);
+ int (*encode_fix)(struct fb_fix_screeninfo *fix,
+ struct atafb_par *par);
+ int (*decode_var)(struct fb_var_screeninfo *var,
+ struct atafb_par *par);
+ int (*encode_var)(struct fb_var_screeninfo *var,
+ struct atafb_par *par);
+ void (*get_par)(struct atafb_par *par);
+ void (*set_par)(struct atafb_par *par);
+ void (*set_screen_base)(void *s_base);
+ int (*blank)(int blank_mode);
+ int (*pan_display)(struct fb_var_screeninfo *var,
+ struct fb_info *info);
+} *fbhw;
+
+static char *autodetect_names[] = { "autodetect", NULL };
+static char *stlow_names[] = { "stlow", NULL };
+static char *stmid_names[] = { "stmid", "default5", NULL };
+static char *sthigh_names[] = { "sthigh", "default4", NULL };
+static char *ttlow_names[] = { "ttlow", NULL };
+static char *ttmid_names[] = { "ttmid", "default1", NULL };
+static char *tthigh_names[] = { "tthigh", "default2", NULL };
+static char *vga2_names[] = { "vga2", NULL };
+static char *vga4_names[] = { "vga4", NULL };
+static char *vga16_names[] = { "vga16", "default3", NULL };
+static char *vga256_names[] = { "vga256", NULL };
+static char *falh2_names[] = { "falh2", NULL };
+static char *falh16_names[] = { "falh16", NULL };
+
+static char **fb_var_names[] = {
+ autodetect_names,
+ stlow_names,
+ stmid_names,
+ sthigh_names,
+ ttlow_names,
+ ttmid_names,
+ tthigh_names,
+ vga2_names,
+ vga4_names,
+ vga16_names,
+ vga256_names,
+ falh2_names,
+ falh16_names,
+ NULL
+};
+
+static struct fb_var_screeninfo atafb_predefined[] = {
+ /*
+ * yres_virtual == 0 means use hw-scrolling if possible, else yres
+ */
+ { /* autodetect */
+ 0, 0, 0, 0, 0, 0, 0, 0, /* xres-grayscale */
+ {0, 0, 0}, {0, 0, 0}, {0, 0, 0}, {0, 0, 0}, /* red green blue tran*/
+ 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
+ { /* st low */
+ 320, 200, 320, 0, 0, 0, 4, 0,
+ {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
+ 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
+ { /* st mid */
+ 640, 200, 640, 0, 0, 0, 2, 0,
+ {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
+ 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
+ { /* st high */
+ 640, 400, 640, 0, 0, 0, 1, 0,
+ {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
+ 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
+ { /* tt low */
+ 320, 480, 320, 0, 0, 0, 8, 0,
+ {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
+ 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
+ { /* tt mid */
+ 640, 480, 640, 0, 0, 0, 4, 0,
+ {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
+ 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
+ { /* tt high */
+ 1280, 960, 1280, 0, 0, 0, 1, 0,
+ {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
+ 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
+ { /* vga2 */
+ 640, 480, 640, 0, 0, 0, 1, 0,
+ {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
+ 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
+ { /* vga4 */
+ 640, 480, 640, 0, 0, 0, 2, 0,
+ {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
+ 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
+ { /* vga16 */
+ 640, 480, 640, 0, 0, 0, 4, 0,
+ {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
+ 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
+ { /* vga256 */
+ 640, 480, 640, 0, 0, 0, 8, 0,
+ {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
+ 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
+ { /* falh2 */
+ 896, 608, 896, 0, 0, 0, 1, 0,
+ {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
+ 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
+ { /* falh16 */
+ 896, 608, 896, 0, 0, 0, 4, 0,
+ {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
+ 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
+};
+
+static int num_atafb_predefined = ARRAY_SIZE(atafb_predefined);
+
+static struct fb_videomode atafb_modedb[] __initdata = {
+ /*
+ * Atari Video Modes
+ *
+ * If you change these, make sure to update DEFMODE_* as well!
+ */
+
+ /*
+ * ST/TT Video Modes
+ */
+
+ {
+ /* 320x200, 15 kHz, 60 Hz (ST low) */
+ "st-low", 60, 320, 200, 32000, 32, 16, 31, 14, 96, 4,
+ 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
+ }, {
+ /* 640x200, 15 kHz, 60 Hz (ST medium) */
+ "st-mid", 60, 640, 200, 32000, 32, 16, 31, 14, 96, 4,
+ 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
+ }, {
+ /* 640x400, 30.25 kHz, 63.5 Hz (ST high) */
+ "st-high", 63, 640, 400, 32000, 128, 0, 40, 14, 128, 4,
+ 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
+ }, {
+ /* 320x480, 15 kHz, 60 Hz (TT low) */
+ "tt-low", 60, 320, 480, 31041, 120, 100, 8, 16, 140, 30,
+ 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
+ }, {
+ /* 640x480, 29 kHz, 57 Hz (TT medium) */
+ "tt-mid", 60, 640, 480, 31041, 120, 100, 8, 16, 140, 30,
+ 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
+ }, {
+ /* 1280x960, 29 kHz, 60 Hz (TT high) */
+ "tt-high", 57, 640, 960, 31041, 120, 100, 8, 16, 140, 30,
+ 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
+ },
+
+ /*
+ * VGA Video Modes
+ */
+
+ {
+ /* 640x480, 31 kHz, 60 Hz (VGA) */
+ "vga", 63.5, 640, 480, 32000, 18, 42, 31, 11, 96, 3,
+ 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
+ }, {
+ /* 640x400, 31 kHz, 70 Hz (VGA) */
+ "vga70", 70, 640, 400, 32000, 18, 42, 31, 11, 96, 3,
+ FB_SYNC_VERT_HIGH_ACT | FB_SYNC_COMP_HIGH_ACT, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
+ },
+
+ /*
+ * Falcon HiRes Video Modes
+ */
+
+ {
+ /* 896x608, 31 kHz, 60 Hz (Falcon High) */
+ "falh", 60, 896, 608, 32000, 18, 42, 31, 1, 96,3,
+ 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
+ },
+};
+
+#define NUM_TOTAL_MODES ARRAY_SIZE(atafb_modedb)
+
+static char *mode_option __initdata = NULL;
+
+ /* default modes */
+
+#define DEFMODE_TT 5 /* "tt-high" for TT */
+#define DEFMODE_F30 7 /* "vga70" for Falcon */
+#define DEFMODE_STE 2 /* "st-high" for ST/E */
+#define DEFMODE_EXT 6 /* "vga" for external */
+
+
+static int get_video_mode(char *vname)
+{
+ char ***name_list;
+ char **name;
+ int i;
+
+ name_list = fb_var_names;
+ for (i = 0; i < num_atafb_predefined; i++) {
+ name = *name_list++;
+ if (!name || !*name)
+ break;
+ while (*name) {
+ if (!strcmp(vname, *name))
+ return i + 1;
+ name++;
+ }
+ }
+ return 0;
+}
+
+
+
+/* ------------------- TT specific functions ---------------------- */
+
+#ifdef ATAFB_TT
+
+static int tt_encode_fix(struct fb_fix_screeninfo *fix, struct atafb_par *par)
+{
+ int mode;
+
+ strcpy(fix->id, "Atari Builtin");
+ fix->smem_start = phys_screen_base;
+ fix->smem_len = screen_len;
+ fix->type = FB_TYPE_INTERLEAVED_PLANES;
+ fix->type_aux = 2;
+ fix->visual = FB_VISUAL_PSEUDOCOLOR;
+ mode = par->hw.tt.mode & TT_SHIFTER_MODEMASK;
+ if (mode == TT_SHIFTER_TTHIGH || mode == TT_SHIFTER_STHIGH) {
+ fix->type = FB_TYPE_PACKED_PIXELS;
+ fix->type_aux = 0;
+ if (mode == TT_SHIFTER_TTHIGH)
+ fix->visual = FB_VISUAL_MONO01;
+ }
+ fix->xpanstep = 0;
+ fix->ypanstep = 1;
+ fix->ywrapstep = 0;
+ fix->line_length = par->next_line;
+ fix->accel = FB_ACCEL_ATARIBLITT;
+ return 0;
+}
+
+static int tt_decode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
+{
+ int xres = var->xres;
+ int yres = var->yres;
+ int bpp = var->bits_per_pixel;
+ int linelen;
+ int yres_virtual = var->yres_virtual;
+
+ if (mono_moni) {
+ if (bpp > 1 || xres > sttt_xres * 2 || yres > tt_yres * 2)
+ return -EINVAL;
+ par->hw.tt.mode = TT_SHIFTER_TTHIGH;
+ xres = sttt_xres * 2;
+ yres = tt_yres * 2;
+ bpp = 1;
+ } else {
+ if (bpp > 8 || xres > sttt_xres || yres > tt_yres)
+ return -EINVAL;
+ if (bpp > 4) {
+ if (xres > sttt_xres / 2 || yres > tt_yres)
+ return -EINVAL;
+ par->hw.tt.mode = TT_SHIFTER_TTLOW;
+ xres = sttt_xres / 2;
+ yres = tt_yres;
+ bpp = 8;
+ } else if (bpp > 2) {
+ if (xres > sttt_xres || yres > tt_yres)
+ return -EINVAL;
+ if (xres > sttt_xres / 2 || yres > st_yres / 2) {
+ par->hw.tt.mode = TT_SHIFTER_TTMID;
+ xres = sttt_xres;
+ yres = tt_yres;
+ bpp = 4;
+ } else {
+ par->hw.tt.mode = TT_SHIFTER_STLOW;
+ xres = sttt_xres / 2;
+ yres = st_yres / 2;
+ bpp = 4;
+ }
+ } else if (bpp > 1) {
+ if (xres > sttt_xres || yres > st_yres / 2)
+ return -EINVAL;
+ par->hw.tt.mode = TT_SHIFTER_STMID;
+ xres = sttt_xres;
+ yres = st_yres / 2;
+ bpp = 2;
+ } else if (var->xres > sttt_xres || var->yres > st_yres) {
+ return -EINVAL;
+ } else {
+ par->hw.tt.mode = TT_SHIFTER_STHIGH;
+ xres = sttt_xres;
+ yres = st_yres;
+ bpp = 1;
+ }
+ }
+ if (yres_virtual <= 0)
+ yres_virtual = 0;
+ else if (yres_virtual < yres)
+ yres_virtual = yres;
+ if (var->sync & FB_SYNC_EXT)
+ par->hw.tt.sync = 0;
+ else
+ par->hw.tt.sync = 1;
+ linelen = xres * bpp / 8;
+ if (yres_virtual * linelen > screen_len && screen_len)
+ return -EINVAL;
+ if (yres * linelen > screen_len && screen_len)
+ return -EINVAL;
+ if (var->yoffset + yres > yres_virtual && yres_virtual)
+ return -EINVAL;
+ par->yres_virtual = yres_virtual;
+ par->screen_base = screen_base + var->yoffset * linelen;
+ par->next_line = linelen;
+ return 0;
+}
+
+static int tt_encode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
+{
+ int linelen;
+ memset(var, 0, sizeof(struct fb_var_screeninfo));
+ var->red.offset = 0;
+ var->red.length = 4;
+ var->red.msb_right = 0;
+ var->grayscale = 0;
+
+ var->pixclock = 31041;
+ var->left_margin = 120; /* these may be incorrect */
+ var->right_margin = 100;
+ var->upper_margin = 8;
+ var->lower_margin = 16;
+ var->hsync_len = 140;
+ var->vsync_len = 30;
+
+ var->height = -1;
+ var->width = -1;
+
+ if (par->hw.tt.sync & 1)
+ var->sync = 0;
+ else
+ var->sync = FB_SYNC_EXT;
+
+ switch (par->hw.tt.mode & TT_SHIFTER_MODEMASK) {
+ case TT_SHIFTER_STLOW:
+ var->xres = sttt_xres / 2;
+ var->xres_virtual = sttt_xres_virtual / 2;
+ var->yres = st_yres / 2;
+ var->bits_per_pixel = 4;
+ break;
+ case TT_SHIFTER_STMID:
+ var->xres = sttt_xres;
+ var->xres_virtual = sttt_xres_virtual;
+ var->yres = st_yres / 2;
+ var->bits_per_pixel = 2;
+ break;
+ case TT_SHIFTER_STHIGH:
+ var->xres = sttt_xres;
+ var->xres_virtual = sttt_xres_virtual;
+ var->yres = st_yres;
+ var->bits_per_pixel = 1;
+ break;
+ case TT_SHIFTER_TTLOW:
+ var->xres = sttt_xres / 2;
+ var->xres_virtual = sttt_xres_virtual / 2;
+ var->yres = tt_yres;
+ var->bits_per_pixel = 8;
+ break;
+ case TT_SHIFTER_TTMID:
+ var->xres = sttt_xres;
+ var->xres_virtual = sttt_xres_virtual;
+ var->yres = tt_yres;
+ var->bits_per_pixel = 4;
+ break;
+ case TT_SHIFTER_TTHIGH:
+ var->red.length = 0;
+ var->xres = sttt_xres * 2;
+ var->xres_virtual = sttt_xres_virtual * 2;
+ var->yres = tt_yres * 2;
+ var->bits_per_pixel = 1;
+ break;
+ }
+ var->blue = var->green = var->red;
+ var->transp.offset = 0;
+ var->transp.length = 0;
+ var->transp.msb_right = 0;
+ linelen = var->xres_virtual * var->bits_per_pixel / 8;
+ if (!use_hwscroll)
+ var->yres_virtual = var->yres;
+ else if (screen_len) {
+ if (par->yres_virtual)
+ var->yres_virtual = par->yres_virtual;
+ else
+ /* yres_virtual == 0 means use maximum */
+ var->yres_virtual = screen_len / linelen;
+ } else {
+ if (hwscroll < 0)
+ var->yres_virtual = 2 * var->yres;
+ else
+ var->yres_virtual = var->yres + hwscroll * 16;
+ }
+ var->xoffset = 0;
+ if (screen_base)
+ var->yoffset = (par->screen_base - screen_base) / linelen;
+ else
+ var->yoffset = 0;
+ var->nonstd = 0;
+ var->activate = 0;
+ var->vmode = FB_VMODE_NONINTERLACED;
+ return 0;
+}
+
+static void tt_get_par(struct atafb_par *par)
+{
+ unsigned long addr;
+ par->hw.tt.mode = shifter_tt.tt_shiftmode;
+ par->hw.tt.sync = shifter.syncmode;
+ addr = ((shifter.bas_hi & 0xff) << 16) |
+ ((shifter.bas_md & 0xff) << 8) |
+ ((shifter.bas_lo & 0xff));
+ par->screen_base = atari_stram_to_virt(addr);
+}
+
+static void tt_set_par(struct atafb_par *par)
+{
+ shifter_tt.tt_shiftmode = par->hw.tt.mode;
+ shifter.syncmode = par->hw.tt.sync;
+ /* only set screen_base if really necessary */
+ if (current_par.screen_base != par->screen_base)
+ fbhw->set_screen_base(par->screen_base);
+}
+
+static int tt_setcolreg(unsigned int regno, unsigned int red,
+ unsigned int green, unsigned int blue,
+ unsigned int transp, struct fb_info *info)
+{
+ if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) == TT_SHIFTER_STHIGH)
+ regno += 254;
+ if (regno > 255)
+ return 1;
+ tt_palette[regno] = (((red >> 12) << 8) | ((green >> 12) << 4) |
+ (blue >> 12));
+ if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) ==
+ TT_SHIFTER_STHIGH && regno == 254)
+ tt_palette[0] = 0;
+ return 0;
+}
+
+static int tt_detect(void)
+{
+ struct atafb_par par;
+
+ /* Determine the connected monitor: The DMA sound must be
+ * disabled before reading the MFP GPIP, because the Sound
+ * Done Signal and the Monochrome Detect are XORed together!
+ *
+ * Even on a TT, we should look if there is a DMA sound. It was
+ * announced that the Eagle is TT compatible, but only the PCM is
+ * missing...
+ */
+ if (ATARIHW_PRESENT(PCM_8BIT)) {
+ tt_dmasnd.ctrl = DMASND_CTRL_OFF;
+ udelay(20); /* wait a while for things to settle down */
+ }
+ mono_moni = (st_mfp.par_dt_reg & 0x80) == 0;
+
+ tt_get_par(&par);
+ tt_encode_var(&atafb_predefined[0], &par);
+
+ return 1;
+}
+
+#endif /* ATAFB_TT */
+
+/* ------------------- Falcon specific functions ---------------------- */
+
+#ifdef ATAFB_FALCON
+
+static int mon_type; /* Falcon connected monitor */
+static int f030_bus_width; /* Falcon ram bus width (for vid_control) */
+#define F_MON_SM 0
+#define F_MON_SC 1
+#define F_MON_VGA 2
+#define F_MON_TV 3
+
+static struct pixel_clock {
+ unsigned long f; /* f/[Hz] */
+ unsigned long t; /* t/[ps] (=1/f) */
+ int right, hsync, left; /* standard timing in clock cycles, not pixel */
+ /* hsync initialized in falcon_detect() */
+ int sync_mask; /* or-mask for hw.falcon.sync to set this clock */
+ int control_mask; /* ditto, for hw.falcon.vid_control */
+} f25 = {
+ 25175000, 39721, 18, 0, 42, 0x0, VCO_CLOCK25
+}, f32 = {
+ 32000000, 31250, 18, 0, 42, 0x0, 0
+}, fext = {
+ 0, 0, 18, 0, 42, 0x1, 0
+};
+
+/* VIDEL-prescale values [mon_type][pixel_length from VCO] */
+static int vdl_prescale[4][3] = {
+ { 4,2,1 }, { 4,2,1 }, { 4,2,2 }, { 4,2,1 }
+};
+
+/* Default hsync timing [mon_type] in picoseconds */
+static long h_syncs[4] = { 3000000, 4875000, 4000000, 4875000 };
+
+static inline int hxx_prescale(struct falcon_hw *hw)
+{
+ return hw->ste_mode ? 16
+ : vdl_prescale[mon_type][hw->vid_mode >> 2 & 0x3];
+}
+
+static int falcon_encode_fix(struct fb_fix_screeninfo *fix,
+ struct atafb_par *par)
+{
+ strcpy(fix->id, "Atari Builtin");
+ fix->smem_start = phys_screen_base;
+ fix->smem_len = screen_len;
+ fix->type = FB_TYPE_INTERLEAVED_PLANES;
+ fix->type_aux = 2;
+ fix->visual = FB_VISUAL_PSEUDOCOLOR;
+ fix->xpanstep = 1;
+ fix->ypanstep = 1;
+ fix->ywrapstep = 0;
+ if (par->hw.falcon.mono) {
+ fix->type = FB_TYPE_PACKED_PIXELS;
+ fix->type_aux = 0;
+ /* no smooth scrolling with longword aligned video mem */
+ fix->xpanstep = 32;
+ } else if (par->hw.falcon.f_shift & 0x100) {
+ fix->type = FB_TYPE_PACKED_PIXELS;
+ fix->type_aux = 0;
+ /* Is this ok or should it be DIRECTCOLOR? */
+ fix->visual = FB_VISUAL_TRUECOLOR;
+ fix->xpanstep = 2;
+ }
+ fix->line_length = par->next_line;
+ fix->accel = FB_ACCEL_ATARIBLITT;
+ return 0;
+}
+
+static int falcon_decode_var(struct fb_var_screeninfo *var,
+ struct atafb_par *par)
+{
+ int bpp = var->bits_per_pixel;
+ int xres = var->xres;
+ int yres = var->yres;
+ int xres_virtual = var->xres_virtual;
+ int yres_virtual = var->yres_virtual;
+ int left_margin, right_margin, hsync_len;
+ int upper_margin, lower_margin, vsync_len;
+ int linelen;
+ int interlace = 0, doubleline = 0;
+ struct pixel_clock *pclock;
+ int plen; /* width of pixel in clock cycles */
+ int xstretch;
+ int prescale;
+ int longoffset = 0;
+ int hfreq, vfreq;
+ int hdb_off, hde_off, base_off;
+ int gstart, gend1, gend2, align;
+
+/*
+ Get the video params out of 'var'. If a value doesn't fit, round
+ it up, if it's too big, return EINVAL.
+ Round up in the following order: bits_per_pixel, xres, yres,
+ xres_virtual, yres_virtual, xoffset, yoffset, grayscale, bitfields,
+ horizontal timing, vertical timing.
+
+ There is a maximum of screen resolution determined by pixelclock
+ and minimum frame rate -- (X+hmarg.)*(Y+vmarg.)*vfmin <= pixelclock.
+ In interlace mode this is " * " *vfmin <= pixelclock.
+ Additional constraints: hfreq.
+ Frequency range for multisync monitors is given via command line.
+ For TV and SM124 both frequencies are fixed.
+
+ X % 16 == 0 to fit 8x?? font (except 1 bitplane modes must use X%32 == 0)
+ Y % 16 == 0 to fit 8x16 font
+ Y % 8 == 0 if Y<400
+
+ Currently interlace and doubleline mode in var are ignored.
+ On SM124 and TV only the standard resolutions can be used.
+*/
+
+ /* Reject uninitialized mode */
+ if (!xres || !yres || !bpp)
+ return -EINVAL;
+
+ if (mon_type == F_MON_SM && bpp != 1)
+ return -EINVAL;
+
+ if (bpp <= 1) {
+ bpp = 1;
+ par->hw.falcon.f_shift = 0x400;
+ par->hw.falcon.st_shift = 0x200;
+ } else if (bpp <= 2) {
+ bpp = 2;
+ par->hw.falcon.f_shift = 0x000;
+ par->hw.falcon.st_shift = 0x100;
+ } else if (bpp <= 4) {
+ bpp = 4;
+ par->hw.falcon.f_shift = 0x000;
+ par->hw.falcon.st_shift = 0x000;
+ } else if (bpp <= 8) {
+ bpp = 8;
+ par->hw.falcon.f_shift = 0x010;
+ } else if (bpp <= 16) {
+ bpp = 16; /* packed pixel mode */
+ par->hw.falcon.f_shift = 0x100; /* hicolor, no overlay */
+ } else
+ return -EINVAL;
+ par->hw.falcon.bpp = bpp;
+
+ if (mon_type == F_MON_SM || DontCalcRes) {
+ /* Skip all calculations. VGA/TV/SC1224 only supported. */
+ struct fb_var_screeninfo *myvar = &atafb_predefined[0];
+
+ if (bpp > myvar->bits_per_pixel ||
+ var->xres > myvar->xres ||
+ var->yres > myvar->yres)
+ return -EINVAL;
+ fbhw->get_par(par); /* Current par will be new par */
+ goto set_screen_base; /* Don't forget this */
+ }
+
+ /* Only some fixed resolutions < 640x400 */
+ if (xres <= 320)
+ xres = 320;
+ else if (xres <= 640 && bpp != 16)
+ xres = 640;
+ if (yres <= 200)
+ yres = 200;
+ else if (yres <= 240)
+ yres = 240;
+ else if (yres <= 400)
+ yres = 400;
+
+ /* 2 planes must use STE compatibility mode */
+ par->hw.falcon.ste_mode = bpp == 2;
+ par->hw.falcon.mono = bpp == 1;
+
+ /* Total and visible scanline length must be a multiple of one longword,
+ * this and the console fontwidth yields the alignment for xres and
+ * xres_virtual.
+ * TODO: this way "odd" fontheights are not supported
+ *
+ * Special case in STE mode: blank and graphic positions don't align,
+ * avoid trash at right margin
+ */
+ if (par->hw.falcon.ste_mode)
+ xres = (xres + 63) & ~63;
+ else if (bpp == 1)
+ xres = (xres + 31) & ~31;
+ else
+ xres = (xres + 15) & ~15;
+ if (yres >= 400)
+ yres = (yres + 15) & ~15;
+ else
+ yres = (yres + 7) & ~7;
+
+ if (xres_virtual < xres)
+ xres_virtual = xres;
+ else if (bpp == 1)
+ xres_virtual = (xres_virtual + 31) & ~31;
+ else
+ xres_virtual = (xres_virtual + 15) & ~15;
+
+ if (yres_virtual <= 0)
+ yres_virtual = 0;
+ else if (yres_virtual < yres)
+ yres_virtual = yres;
+
+ /* backward bug-compatibility */
+ if (var->pixclock > 1)
+ var->pixclock -= 1;
+
+ par->hw.falcon.line_width = bpp * xres / 16;
+ par->hw.falcon.line_offset = bpp * (xres_virtual - xres) / 16;
+
+ /* single or double pixel width */
+ xstretch = (xres < 640) ? 2 : 1;
+
+#if 0 /* SM124 supports only 640x400, this is rejected above */
+ if (mon_type == F_MON_SM) {
+ if (xres != 640 && yres != 400)
+ return -EINVAL;
+ plen = 1;
+ pclock = &f32;
+ /* SM124-mode is special */
+ par->hw.falcon.ste_mode = 1;
+ par->hw.falcon.f_shift = 0x000;
+ par->hw.falcon.st_shift = 0x200;
+ left_margin = hsync_len = 128 / plen;
+ right_margin = 0;
+ /* TODO set all margins */
+ } else
+#endif
+ if (mon_type == F_MON_SC || mon_type == F_MON_TV) {
+ plen = 2 * xstretch;
+ if (var->pixclock > f32.t * plen)
+ return -EINVAL;
+ pclock = &f32;
+ if (yres > 240)
+ interlace = 1;
+ if (var->pixclock == 0) {
+ /* set some minimal margins which center the screen */
+ left_margin = 32;
+ right_margin = 18;
+ hsync_len = pclock->hsync / plen;
+ upper_margin = 31;
+ lower_margin = 14;
+ vsync_len = interlace ? 3 : 4;
+ } else {
+ left_margin = var->left_margin;
+ right_margin = var->right_margin;
+ hsync_len = var->hsync_len;
+ upper_margin = var->upper_margin;
+ lower_margin = var->lower_margin;
+ vsync_len = var->vsync_len;
+ if (var->vmode & FB_VMODE_INTERLACED) {
+ upper_margin = (upper_margin + 1) / 2;
+ lower_margin = (lower_margin + 1) / 2;
+ vsync_len = (vsync_len + 1) / 2;
+ } else if (var->vmode & FB_VMODE_DOUBLE) {
+ upper_margin *= 2;
+ lower_margin *= 2;
+ vsync_len *= 2;
+ }
+ }
+ } else { /* F_MON_VGA */
+ if (bpp == 16)
+ xstretch = 2; /* Double pixel width only for hicolor */
+ /* Default values are used for vert./hor. timing if no pixelclock given. */
+ if (var->pixclock == 0) {
+ int linesize;
+
+ /* Choose master pixelclock depending on hor. timing */
+ plen = 1 * xstretch;
+ if ((plen * xres + f25.right + f25.hsync + f25.left) *
+ fb_info.monspecs.hfmin < f25.f)
+ pclock = &f25;
+ else if ((plen * xres + f32.right + f32.hsync +
+ f32.left) * fb_info.monspecs.hfmin < f32.f)
+ pclock = &f32;
+ else if ((plen * xres + fext.right + fext.hsync +
+ fext.left) * fb_info.monspecs.hfmin < fext.f &&
+ fext.f)
+ pclock = &fext;
+ else
+ return -EINVAL;
+
+ left_margin = pclock->left / plen;
+ right_margin = pclock->right / plen;
+ hsync_len = pclock->hsync / plen;
+ linesize = left_margin + xres + right_margin + hsync_len;
+ upper_margin = 31;
+ lower_margin = 11;
+ vsync_len = 3;
+ } else {
+ /* Choose largest pixelclock <= wanted clock */
+ int i;
+ unsigned long pcl = ULONG_MAX;
+ pclock = 0;
+ for (i = 1; i <= 4; i *= 2) {
+ if (f25.t * i >= var->pixclock &&
+ f25.t * i < pcl) {
+ pcl = f25.t * i;
+ pclock = &f25;
+ }
+ if (f32.t * i >= var->pixclock &&
+ f32.t * i < pcl) {
+ pcl = f32.t * i;
+ pclock = &f32;
+ }
+ if (fext.t && fext.t * i >= var->pixclock &&
+ fext.t * i < pcl) {
+ pcl = fext.t * i;
+ pclock = &fext;
+ }
+ }
+ if (!pclock)
+ return -EINVAL;
+ plen = pcl / pclock->t;
+
+ left_margin = var->left_margin;
+ right_margin = var->right_margin;
+ hsync_len = var->hsync_len;
+ upper_margin = var->upper_margin;
+ lower_margin = var->lower_margin;
+ vsync_len = var->vsync_len;
+ /* Internal unit is [single lines per (half-)frame] */
+ if (var->vmode & FB_VMODE_INTERLACED) {
+ /* # lines in half frame */
+ /* External unit is [lines per full frame] */
+ upper_margin = (upper_margin + 1) / 2;
+ lower_margin = (lower_margin + 1) / 2;
+ vsync_len = (vsync_len + 1) / 2;
+ } else if (var->vmode & FB_VMODE_DOUBLE) {
+ /* External unit is [double lines per frame] */
+ upper_margin *= 2;
+ lower_margin *= 2;
+ vsync_len *= 2;
+ }
+ }
+ if (pclock == &fext)
+ longoffset = 1; /* VIDEL doesn't synchronize on short offset */
+ }
+ /* Is video bus bandwidth (32MB/s) too low for this resolution? */
+ /* this is definitely wrong if bus clock != 32MHz */
+ if (pclock->f / plen / 8 * bpp > 32000000L)
+ return -EINVAL;
+
+ if (vsync_len < 1)
+ vsync_len = 1;
+
+ /* include sync lengths in right/lower margin for all calculations */
+ right_margin += hsync_len;
+ lower_margin += vsync_len;
+
+ /* ! In all calculations of margins we use # of lines in half frame
+ * (which is a full frame in non-interlace mode), so we can switch
+ * between interlace and non-interlace without messing around
+ * with these.
+ */
+again:
+ /* Set base_offset 128 and video bus width */
+ par->hw.falcon.vid_control = mon_type | f030_bus_width;
+ if (!longoffset)
+ par->hw.falcon.vid_control |= VCO_SHORTOFFS; /* base_offset 64 */
+ if (var->sync & FB_SYNC_HOR_HIGH_ACT)
+ par->hw.falcon.vid_control |= VCO_HSYPOS;
+ if (var->sync & FB_SYNC_VERT_HIGH_ACT)
+ par->hw.falcon.vid_control |= VCO_VSYPOS;
+ /* Pixelclock */
+ par->hw.falcon.vid_control |= pclock->control_mask;
+ /* External or internal clock */
+ par->hw.falcon.sync = pclock->sync_mask | 0x2;
+ /* Pixellength and prescale */
+ par->hw.falcon.vid_mode = (2 / plen) << 2;
+ if (doubleline)
+ par->hw.falcon.vid_mode |= VMO_DOUBLE;
+ if (interlace)
+ par->hw.falcon.vid_mode |= VMO_INTER;
+
+ /*********************
+ * Horizontal timing: unit = [master clock cycles]
+ * unit of hxx-registers: [master clock cycles * prescale]
+ * Hxx-registers are 9 bit wide
+ *
+ * 1 line = ((hht + 2) * 2 * prescale) clock cycles
+ *
+ * graphic output = hdb & 0x200 ?
+ * ((hht + 2) * 2 - hdb + hde) * prescale - hdboff + hdeoff:
+ * (hht + 2 - hdb + hde) * prescale - hdboff + hdeoff
+ * (this must be a multiple of plen*128/bpp, on VGA pixels
+ * to the right may be cut off with a bigger right margin)
+ *
+ * start of graphics relative to start of 1st halfline = hdb & 0x200 ?
+ * (hdb - hht - 2) * prescale + hdboff :
+ * hdb * prescale + hdboff
+ *
+ * end of graphics relative to start of 1st halfline =
+ * (hde + hht + 2) * prescale + hdeoff
+ *********************/
+ /* Calculate VIDEL registers */
+{
+ prescale = hxx_prescale(&par->hw.falcon);
+ base_off = par->hw.falcon.vid_control & VCO_SHORTOFFS ? 64 : 128;
+
+ /* Offsets depend on video mode */
+ /* Offsets are in clock cycles, divide by prescale to
+ * calculate hd[be]-registers
+ */
+ if (par->hw.falcon.f_shift & 0x100) {
+ align = 1;
+ hde_off = 0;
+ hdb_off = (base_off + 16 * plen) + prescale;
+ } else {
+ align = 128 / bpp;
+ hde_off = ((128 / bpp + 2) * plen);
+ if (par->hw.falcon.ste_mode)
+ hdb_off = (64 + base_off + (128 / bpp + 2) * plen) + prescale;
+ else
+ hdb_off = (base_off + (128 / bpp + 18) * plen) + prescale;
+ }
+
+ gstart = (prescale / 2 + plen * left_margin) / prescale;
+ /* gend1 is for hde (gend-gstart multiple of align), shifter's xres */
+ gend1 = gstart + roundup(xres, align) * plen / prescale;
+ /* gend2 is for hbb, visible xres (rest to gend1 is cut off by hblank) */
+ gend2 = gstart + xres * plen / prescale;
+ par->HHT = plen * (left_margin + xres + right_margin) /
+ (2 * prescale) - 2;
+/* par->HHT = (gend2 + plen * right_margin / prescale) / 2 - 2;*/
+
+ par->HDB = gstart - hdb_off / prescale;
+ par->HBE = gstart;
+ if (par->HDB < 0)
+ par->HDB += par->HHT + 2 + 0x200;
+ par->HDE = gend1 - par->HHT - 2 - hde_off / prescale;
+ par->HBB = gend2 - par->HHT - 2;
+#if 0
+ /* One more Videl constraint: data fetch of two lines must not overlap */
+ if ((par->HDB & 0x200) && (par->HDB & ~0x200) - par->HDE <= 5) {
+ /* if this happens increase margins, decrease hfreq. */
+ }
+#endif
+ if (hde_off % prescale)
+ par->HBB++; /* compensate for non matching hde and hbb */
+ par->HSS = par->HHT + 2 - plen * hsync_len / prescale;
+ if (par->HSS < par->HBB)
+ par->HSS = par->HBB;
+}
+
+ /* check hor. frequency */
+ hfreq = pclock->f / ((par->HHT + 2) * prescale * 2);
+ if (hfreq > fb_info.monspecs.hfmax && mon_type != F_MON_VGA) {
+ /* ++guenther: ^^^^^^^^^^^^^^^^^^^ can't remember why I did this */
+ /* Too high -> enlarge margin */
+ left_margin += 1;
+ right_margin += 1;
+ goto again;
+ }
+ if (hfreq > fb_info.monspecs.hfmax || hfreq < fb_info.monspecs.hfmin)
+ return -EINVAL;
+
+ /* Vxx-registers */
+ /* All Vxx must be odd in non-interlace, since frame starts in the middle
+ * of the first displayed line!
+ * One frame consists of VFT+1 half lines. VFT+1 must be even in
+ * non-interlace, odd in interlace mode for synchronisation.
+ * Vxx-registers are 11 bit wide
+ */
+ par->VBE = (upper_margin * 2 + 1); /* must begin on odd halfline */
+ par->VDB = par->VBE;
+ par->VDE = yres;
+ if (!interlace)
+ par->VDE <<= 1;
+ if (doubleline)
+ par->VDE <<= 1; /* VDE now half lines per (half-)frame */
+ par->VDE += par->VDB;
+ par->VBB = par->VDE;
+ par->VFT = par->VBB + (lower_margin * 2 - 1) - 1;
+ par->VSS = par->VFT + 1 - (vsync_len * 2 - 1);
+ /* vbb,vss,vft must be even in interlace mode */
+ if (interlace) {
+ par->VBB++;
+ par->VSS++;
+ par->VFT++;
+ }
+
+ /* V-frequency check, hope I didn't create any loop here. */
+ /* Interlace and doubleline are mutually exclusive. */
+ vfreq = (hfreq * 2) / (par->VFT + 1);
+ if (vfreq > fb_info.monspecs.vfmax && !doubleline && !interlace) {
+ /* Too high -> try again with doubleline */
+ doubleline = 1;
+ goto again;
+ } else if (vfreq < fb_info.monspecs.vfmin && !interlace && !doubleline) {
+ /* Too low -> try again with interlace */
+ interlace = 1;
+ goto again;
+ } else if (vfreq < fb_info.monspecs.vfmin && doubleline) {
+ /* Doubleline too low -> clear doubleline and enlarge margins */
+ int lines;
+ doubleline = 0;
+ for (lines = 0;
+ (hfreq * 2) / (par->VFT + 1 + 4 * lines - 2 * yres) >
+ fb_info.monspecs.vfmax;
+ lines++)
+ ;
+ upper_margin += lines;
+ lower_margin += lines;
+ goto again;
+ } else if (vfreq > fb_info.monspecs.vfmax && doubleline) {
+ /* Doubleline too high -> enlarge margins */
+ int lines;
+ for (lines = 0;
+ (hfreq * 2) / (par->VFT + 1 + 4 * lines) >
+ fb_info.monspecs.vfmax;
+ lines += 2)
+ ;
+ upper_margin += lines;
+ lower_margin += lines;
+ goto again;
+ } else if (vfreq > fb_info.monspecs.vfmax && interlace) {
+ /* Interlace, too high -> enlarge margins */
+ int lines;
+ for (lines = 0;
+ (hfreq * 2) / (par->VFT + 1 + 4 * lines) >
+ fb_info.monspecs.vfmax;
+ lines++)
+ ;
+ upper_margin += lines;
+ lower_margin += lines;
+ goto again;
+ } else if (vfreq < fb_info.monspecs.vfmin ||
+ vfreq > fb_info.monspecs.vfmax)
+ return -EINVAL;
+
+set_screen_base:
+ linelen = xres_virtual * bpp / 8;
+ if (yres_virtual * linelen > screen_len && screen_len)
+ return -EINVAL;
+ if (yres * linelen > screen_len && screen_len)
+ return -EINVAL;
+ if (var->yoffset + yres > yres_virtual && yres_virtual)
+ return -EINVAL;
+ par->yres_virtual = yres_virtual;
+ par->screen_base = screen_base + var->yoffset * linelen;
+ par->hw.falcon.xoffset = 0;
+
+ par->next_line = linelen;
+
+ return 0;
+}
+
+static int falcon_encode_var(struct fb_var_screeninfo *var,
+ struct atafb_par *par)
+{
+/* !!! only for VGA !!! */
+ int linelen;
+ int prescale, plen;
+ int hdb_off, hde_off, base_off;
+ struct falcon_hw *hw = &par->hw.falcon;
+
+ memset(var, 0, sizeof(struct fb_var_screeninfo));
+ /* possible frequencies: 25.175 or 32MHz */
+ var->pixclock = hw->sync & 0x1 ? fext.t :
+ hw->vid_control & VCO_CLOCK25 ? f25.t : f32.t;
+
+ var->height = -1;
+ var->width = -1;
+
+ var->sync = 0;
+ if (hw->vid_control & VCO_HSYPOS)
+ var->sync |= FB_SYNC_HOR_HIGH_ACT;
+ if (hw->vid_control & VCO_VSYPOS)
+ var->sync |= FB_SYNC_VERT_HIGH_ACT;
+
+ var->vmode = FB_VMODE_NONINTERLACED;
+ if (hw->vid_mode & VMO_INTER)
+ var->vmode |= FB_VMODE_INTERLACED;
+ if (hw->vid_mode & VMO_DOUBLE)
+ var->vmode |= FB_VMODE_DOUBLE;
+
+ /* visible y resolution:
+ * Graphics display starts at line VDB and ends at line
+ * VDE. If interlace mode off unit of VC-registers is
+ * half lines, else lines.
+ */
+ var->yres = hw->vde - hw->vdb;
+ if (!(var->vmode & FB_VMODE_INTERLACED))
+ var->yres >>= 1;
+ if (var->vmode & FB_VMODE_DOUBLE)
+ var->yres >>= 1;
+
+ /*
+ * to get bpp, we must examine f_shift and st_shift.
+ * f_shift is valid if any of bits no. 10, 8 or 4
+ * is set. Priority in f_shift is: 10 ">" 8 ">" 4, i.e.
+ * if bit 10 set then bit 8 and bit 4 don't care...
+ * If all these bits are 0 get display depth from st_shift
+ * (as for ST and STE)
+ */
+ if (hw->f_shift & 0x400) /* 2 colors */
+ var->bits_per_pixel = 1;
+ else if (hw->f_shift & 0x100) /* hicolor */
+ var->bits_per_pixel = 16;
+ else if (hw->f_shift & 0x010) /* 8 bitplanes */
+ var->bits_per_pixel = 8;
+ else if (hw->st_shift == 0)
+ var->bits_per_pixel = 4;
+ else if (hw->st_shift == 0x100)
+ var->bits_per_pixel = 2;
+ else /* if (hw->st_shift == 0x200) */
+ var->bits_per_pixel = 1;
+
+ var->xres = hw->line_width * 16 / var->bits_per_pixel;
+ var->xres_virtual = var->xres + hw->line_offset * 16 / var->bits_per_pixel;
+ if (hw->xoffset)
+ var->xres_virtual += 16;
+
+ if (var->bits_per_pixel == 16) {
+ var->red.offset = 11;
+ var->red.length = 5;
+ var->red.msb_right = 0;
+ var->green.offset = 5;
+ var->green.length = 6;
+ var->green.msb_right = 0;
+ var->blue.offset = 0;
+ var->blue.length = 5;
+ var->blue.msb_right = 0;
+ } else {
+ var->red.offset = 0;
+ var->red.length = hw->ste_mode ? 4 : 6;
+ if (var->red.length > var->bits_per_pixel)
+ var->red.length = var->bits_per_pixel;
+ var->red.msb_right = 0;
+ var->grayscale = 0;
+ var->blue = var->green = var->red;
+ }
+ var->transp.offset = 0;
+ var->transp.length = 0;
+ var->transp.msb_right = 0;
+
+ linelen = var->xres_virtual * var->bits_per_pixel / 8;
+ if (screen_len) {
+ if (par->yres_virtual)
+ var->yres_virtual = par->yres_virtual;
+ else
+ /* yres_virtual == 0 means use maximum */
+ var->yres_virtual = screen_len / linelen;
+ } else {
+ if (hwscroll < 0)
+ var->yres_virtual = 2 * var->yres;
+ else
+ var->yres_virtual = var->yres + hwscroll * 16;
+ }
+ var->xoffset = 0; /* TODO change this */
+
+ /* hdX-offsets */
+ prescale = hxx_prescale(hw);
+ plen = 4 >> (hw->vid_mode >> 2 & 0x3);
+ base_off = hw->vid_control & VCO_SHORTOFFS ? 64 : 128;
+ if (hw->f_shift & 0x100) {
+ hde_off = 0;
+ hdb_off = (base_off + 16 * plen) + prescale;
+ } else {
+ hde_off = ((128 / var->bits_per_pixel + 2) * plen);
+ if (hw->ste_mode)
+ hdb_off = (64 + base_off + (128 / var->bits_per_pixel + 2) * plen)
+ + prescale;
+ else
+ hdb_off = (base_off + (128 / var->bits_per_pixel + 18) * plen)
+ + prescale;
+ }
+
+ /* Right margin includes hsync */
+ var->left_margin = hdb_off + prescale * ((hw->hdb & 0x1ff) -
+ (hw->hdb & 0x200 ? 2 + hw->hht : 0));
+ if (hw->ste_mode || mon_type != F_MON_VGA)
+ var->right_margin = prescale * (hw->hht + 2 - hw->hde) - hde_off;
+ else
+ /* can't use this in ste_mode, because hbb is +1 off */
+ var->right_margin = prescale * (hw->hht + 2 - hw->hbb);
+ var->hsync_len = prescale * (hw->hht + 2 - hw->hss);
+
+ /* Lower margin includes vsync */
+ var->upper_margin = hw->vdb / 2; /* round down to full lines */
+ var->lower_margin = (hw->vft + 1 - hw->vde + 1) / 2; /* round up */
+ var->vsync_len = (hw->vft + 1 - hw->vss + 1) / 2; /* round up */
+ if (var->vmode & FB_VMODE_INTERLACED) {
+ var->upper_margin *= 2;
+ var->lower_margin *= 2;
+ var->vsync_len *= 2;
+ } else if (var->vmode & FB_VMODE_DOUBLE) {
+ var->upper_margin = (var->upper_margin + 1) / 2;
+ var->lower_margin = (var->lower_margin + 1) / 2;
+ var->vsync_len = (var->vsync_len + 1) / 2;
+ }
+
+ var->pixclock *= plen;
+ var->left_margin /= plen;
+ var->right_margin /= plen;
+ var->hsync_len /= plen;
+
+ var->right_margin -= var->hsync_len;
+ var->lower_margin -= var->vsync_len;
+
+ if (screen_base)
+ var->yoffset = (par->screen_base - screen_base) / linelen;
+ else
+ var->yoffset = 0;
+ var->nonstd = 0; /* what is this for? */
+ var->activate = 0;
+ return 0;
+}
+
+static int f_change_mode;
+static struct falcon_hw f_new_mode;
+static int f_pan_display;
+
+static void falcon_get_par(struct atafb_par *par)
+{
+ unsigned long addr;
+ struct falcon_hw *hw = &par->hw.falcon;
+
+ hw->line_width = shifter_f030.scn_width;
+ hw->line_offset = shifter_f030.off_next;
+ hw->st_shift = videl.st_shift & 0x300;
+ hw->f_shift = videl.f_shift;
+ hw->vid_control = videl.control;
+ hw->vid_mode = videl.mode;
+ hw->sync = shifter.syncmode & 0x1;
+ hw->xoffset = videl.xoffset & 0xf;
+ hw->hht = videl.hht;
+ hw->hbb = videl.hbb;
+ hw->hbe = videl.hbe;
+ hw->hdb = videl.hdb;
+ hw->hde = videl.hde;
+ hw->hss = videl.hss;
+ hw->vft = videl.vft;
+ hw->vbb = videl.vbb;
+ hw->vbe = videl.vbe;
+ hw->vdb = videl.vdb;
+ hw->vde = videl.vde;
+ hw->vss = videl.vss;
+
+ addr = (shifter.bas_hi & 0xff) << 16 |
+ (shifter.bas_md & 0xff) << 8 |
+ (shifter.bas_lo & 0xff);
+ par->screen_base = atari_stram_to_virt(addr);
+
+ /* derived parameters */
+ hw->ste_mode = (hw->f_shift & 0x510) == 0 && hw->st_shift == 0x100;
+ hw->mono = (hw->f_shift & 0x400) ||
+ ((hw->f_shift & 0x510) == 0 && hw->st_shift == 0x200);
+}
+
+static void falcon_set_par(struct atafb_par *par)
+{
+ f_change_mode = 0;
+
+ /* only set screen_base if really necessary */
+ if (current_par.screen_base != par->screen_base)
+ fbhw->set_screen_base(par->screen_base);
+
+ /* Don't touch any other registers if we keep the default resolution */
+ if (DontCalcRes)
+ return;
+
+ /* Tell vbl-handler to change video mode.
+ * We change modes only on next VBL, to avoid desynchronisation
+ * (a shift to the right and wrap around by a random number of pixels
+ * in all monochrome modes).
+ * This seems to work on my Falcon.
+ */
+ f_new_mode = par->hw.falcon;
+ f_change_mode = 1;
+}
+
+static irqreturn_t falcon_vbl_switcher(int irq, void *dummy)
+{
+ struct falcon_hw *hw = &f_new_mode;
+
+ if (f_change_mode) {
+ f_change_mode = 0;
+
+ if (hw->sync & 0x1) {
+ /* Enable external pixelclock. This code only for ScreenWonder */
+ *(volatile unsigned short *)0xffff9202 = 0xffbf;
+ } else {
+ /* Turn off external clocks. Read sets all output bits to 1. */
+ *(volatile unsigned short *)0xffff9202;
+ }
+ shifter.syncmode = hw->sync;
+
+ videl.hht = hw->hht;
+ videl.hbb = hw->hbb;
+ videl.hbe = hw->hbe;
+ videl.hdb = hw->hdb;
+ videl.hde = hw->hde;
+ videl.hss = hw->hss;
+ videl.vft = hw->vft;
+ videl.vbb = hw->vbb;
+ videl.vbe = hw->vbe;
+ videl.vdb = hw->vdb;
+ videl.vde = hw->vde;
+ videl.vss = hw->vss;
+
+ videl.f_shift = 0; /* write enables Falcon palette, 0: 4 planes */
+ if (hw->ste_mode) {
+ videl.st_shift = hw->st_shift; /* write enables STE palette */
+ } else {
+ /* IMPORTANT:
+ * set st_shift 0, so we can tell the screen-depth if f_shift == 0.
+ * Writing 0 to f_shift enables 4 plane Falcon mode but
+ * doesn't set st_shift. st_shift != 0 (!= 4planes) is impossible
+ * with Falcon palette.
+ */
+ videl.st_shift = 0;
+ /* now back to Falcon palette mode */
+ videl.f_shift = hw->f_shift;
+ }
+ /* writing to st_shift changed scn_width and vid_mode */
+ videl.xoffset = hw->xoffset;
+ shifter_f030.scn_width = hw->line_width;
+ shifter_f030.off_next = hw->line_offset;
+ videl.control = hw->vid_control;
+ videl.mode = hw->vid_mode;
+ }
+ if (f_pan_display) {
+ f_pan_display = 0;
+ videl.xoffset = current_par.hw.falcon.xoffset;
+ shifter_f030.off_next = current_par.hw.falcon.line_offset;
+ }
+ return IRQ_HANDLED;
+}
+
+static int falcon_pan_display(struct fb_var_screeninfo *var,
+ struct fb_info *info)
+{
+ struct atafb_par *par = (struct atafb_par *)info->par;
+
+ int xoffset;
+ int bpp = info->var.bits_per_pixel;
+
+ if (bpp == 1)
+ var->xoffset = up(var->xoffset, 32);
+ if (bpp != 16)
+ par->hw.falcon.xoffset = var->xoffset & 15;
+ else {
+ par->hw.falcon.xoffset = 0;
+ var->xoffset = up(var->xoffset, 2);
+ }
+ par->hw.falcon.line_offset = bpp *
+ (info->var.xres_virtual - info->var.xres) / 16;
+ if (par->hw.falcon.xoffset)
+ par->hw.falcon.line_offset -= bpp;
+ xoffset = var->xoffset - par->hw.falcon.xoffset;
+
+ par->screen_base = screen_base +
+ (var->yoffset * info->var.xres_virtual + xoffset) * bpp / 8;
+ if (fbhw->set_screen_base)
+ fbhw->set_screen_base(par->screen_base);
+ else
+ return -EINVAL; /* shouldn't happen */
+ f_pan_display = 1;
+ return 0;
+}
+
+static int falcon_setcolreg(unsigned int regno, unsigned int red,
+ unsigned int green, unsigned int blue,
+ unsigned int transp, struct fb_info *info)
+{
+ if (regno > 255)
+ return 1;
+ f030_col[regno] = (((red & 0xfc00) << 16) |
+ ((green & 0xfc00) << 8) |
+ ((blue & 0xfc00) >> 8));
+ if (regno < 16) {
+ shifter_tt.color_reg[regno] =
+ (((red & 0xe000) >> 13) | ((red & 0x1000) >> 12) << 8) |
+ (((green & 0xe000) >> 13) | ((green & 0x1000) >> 12) << 4) |
+ ((blue & 0xe000) >> 13) | ((blue & 0x1000) >> 12);
+ ((u32 *)info->pseudo_palette)[regno] = ((red & 0xf800) |
+ ((green & 0xfc00) >> 5) |
+ ((blue & 0xf800) >> 11));
+ }
+ return 0;
+}
+
+static int falcon_blank(int blank_mode)
+{
+ /* ++guenther: we can switch off graphics by changing VDB and VDE,
+ * so VIDEL doesn't hog the bus while saving.
+ * (this may affect usleep()).
+ */
+ int vdb, vss, hbe, hss;
+
+ if (mon_type == F_MON_SM) /* this doesn't work on SM124 */
+ return 1;
+
+ vdb = current_par.VDB;
+ vss = current_par.VSS;
+ hbe = current_par.HBE;
+ hss = current_par.HSS;
+
+ if (blank_mode >= 1) {
+ /* disable graphics output (this speeds up the CPU) ... */
+ vdb = current_par.VFT + 1;
+ /* ... and blank all lines */
+ hbe = current_par.HHT + 2;
+ }
+ /* use VESA suspend modes on VGA monitors */
+ if (mon_type == F_MON_VGA) {
+ if (blank_mode == 2 || blank_mode == 4)
+ vss = current_par.VFT + 1;
+ if (blank_mode == 3 || blank_mode == 4)
+ hss = current_par.HHT + 2;
+ }
+
+ videl.vdb = vdb;
+ videl.vss = vss;
+ videl.hbe = hbe;
+ videl.hss = hss;
+
+ return 0;
+}
+
+static int falcon_detect(void)
+{
+ struct atafb_par par;
+ unsigned char fhw;
+
+ /* Determine connected monitor and set monitor parameters */
+ fhw = *(unsigned char *)0xffff8006;
+ mon_type = fhw >> 6 & 0x3;
+ /* bit 1 of fhw: 1=32 bit ram bus, 0=16 bit */
+ f030_bus_width = fhw << 6 & 0x80;
+ switch (mon_type) {
+ case F_MON_SM:
+ fb_info.monspecs.vfmin = 70;
+ fb_info.monspecs.vfmax = 72;
+ fb_info.monspecs.hfmin = 35713;
+ fb_info.monspecs.hfmax = 35715;
+ break;
+ case F_MON_SC:
+ case F_MON_TV:
+ /* PAL...NTSC */
+ fb_info.monspecs.vfmin = 49; /* not 50, since TOS defaults to 49.9x Hz */
+ fb_info.monspecs.vfmax = 60;
+ fb_info.monspecs.hfmin = 15620;
+ fb_info.monspecs.hfmax = 15755;
+ break;
+ }
+ /* initialize hsync-len */
+ f25.hsync = h_syncs[mon_type] / f25.t;
+ f32.hsync = h_syncs[mon_type] / f32.t;
+ if (fext.t)
+ fext.hsync = h_syncs[mon_type] / fext.t;
+
+ falcon_get_par(&par);
+ falcon_encode_var(&atafb_predefined[0], &par);
+
+ /* Detected mode is always the "autodetect" slot */
+ return 1;
+}
+
+#endif /* ATAFB_FALCON */
+
+/* ------------------- ST(E) specific functions ---------------------- */
+
+#ifdef ATAFB_STE
+
+static int stste_encode_fix(struct fb_fix_screeninfo *fix,
+ struct atafb_par *par)
+{
+ int mode;
+
+ strcpy(fix->id, "Atari Builtin");
+ fix->smem_start = phys_screen_base;
+ fix->smem_len = screen_len;
+ fix->type = FB_TYPE_INTERLEAVED_PLANES;
+ fix->type_aux = 2;
+ fix->visual = FB_VISUAL_PSEUDOCOLOR;
+ mode = par->hw.st.mode & 3;
+ if (mode == ST_HIGH) {
+ fix->type = FB_TYPE_PACKED_PIXELS;
+ fix->type_aux = 0;
+ fix->visual = FB_VISUAL_MONO10;
+ }
+ if (ATARIHW_PRESENT(EXTD_SHIFTER)) {
+ fix->xpanstep = 16;
+ fix->ypanstep = 1;
+ } else {
+ fix->xpanstep = 0;
+ fix->ypanstep = 0;
+ }
+ fix->ywrapstep = 0;
+ fix->line_length = par->next_line;
+ fix->accel = FB_ACCEL_ATARIBLITT;
+ return 0;
+}
+
+static int stste_decode_var(struct fb_var_screeninfo *var,
+ struct atafb_par *par)
+{
+ int xres = var->xres;
+ int yres = var->yres;
+ int bpp = var->bits_per_pixel;
+ int linelen;
+ int yres_virtual = var->yres_virtual;
+
+ if (mono_moni) {
+ if (bpp > 1 || xres > sttt_xres || yres > st_yres)
+ return -EINVAL;
+ par->hw.st.mode = ST_HIGH;
+ xres = sttt_xres;
+ yres = st_yres;
+ bpp = 1;
+ } else {
+ if (bpp > 4 || xres > sttt_xres || yres > st_yres)
+ return -EINVAL;
+ if (bpp > 2) {
+ if (xres > sttt_xres / 2 || yres > st_yres / 2)
+ return -EINVAL;
+ par->hw.st.mode = ST_LOW;
+ xres = sttt_xres / 2;
+ yres = st_yres / 2;
+ bpp = 4;
+ } else if (bpp > 1) {
+ if (xres > sttt_xres || yres > st_yres / 2)
+ return -EINVAL;
+ par->hw.st.mode = ST_MID;
+ xres = sttt_xres;
+ yres = st_yres / 2;
+ bpp = 2;
+ } else
+ return -EINVAL;
+ }
+ if (yres_virtual <= 0)
+ yres_virtual = 0;
+ else if (yres_virtual < yres)
+ yres_virtual = yres;
+ if (var->sync & FB_SYNC_EXT)
+ par->hw.st.sync = (par->hw.st.sync & ~1) | 1;
+ else
+ par->hw.st.sync = (par->hw.st.sync & ~1);
+ linelen = xres * bpp / 8;
+ if (yres_virtual * linelen > screen_len && screen_len)
+ return -EINVAL;
+ if (yres * linelen > screen_len && screen_len)
+ return -EINVAL;
+ if (var->yoffset + yres > yres_virtual && yres_virtual)
+ return -EINVAL;
+ par->yres_virtual = yres_virtual;
+ par->screen_base = screen_base + var->yoffset * linelen;
+ par->next_line = linelen;
+ return 0;
+}
+
+static int stste_encode_var(struct fb_var_screeninfo *var,
+ struct atafb_par *par)
+{
+ int linelen;
+ memset(var, 0, sizeof(struct fb_var_screeninfo));
+ var->red.offset = 0;
+ var->red.length = ATARIHW_PRESENT(EXTD_SHIFTER) ? 4 : 3;
+ var->red.msb_right = 0;
+ var->grayscale = 0;
+
+ var->pixclock = 31041;
+ var->left_margin = 120; /* these are incorrect */
+ var->right_margin = 100;
+ var->upper_margin = 8;
+ var->lower_margin = 16;
+ var->hsync_len = 140;
+ var->vsync_len = 30;
+
+ var->height = -1;
+ var->width = -1;
+
+ if (!(par->hw.st.sync & 1))
+ var->sync = 0;
+ else
+ var->sync = FB_SYNC_EXT;
+
+ switch (par->hw.st.mode & 3) {
+ case ST_LOW:
+ var->xres = sttt_xres / 2;
+ var->yres = st_yres / 2;
+ var->bits_per_pixel = 4;
+ break;
+ case ST_MID:
+ var->xres = sttt_xres;
+ var->yres = st_yres / 2;
+ var->bits_per_pixel = 2;
+ break;
+ case ST_HIGH:
+ var->xres = sttt_xres;
+ var->yres = st_yres;
+ var->bits_per_pixel = 1;
+ break;
+ }
+ var->blue = var->green = var->red;
+ var->transp.offset = 0;
+ var->transp.length = 0;
+ var->transp.msb_right = 0;
+ var->xres_virtual = sttt_xres_virtual;
+ linelen = var->xres_virtual * var->bits_per_pixel / 8;
+ ovsc_addlen = linelen * (sttt_yres_virtual - st_yres);
+
+ if (!use_hwscroll)
+ var->yres_virtual = var->yres;
+ else if (screen_len) {
+ if (par->yres_virtual)
+ var->yres_virtual = par->yres_virtual;
+ else
+ /* yres_virtual == 0 means use maximum */
+ var->yres_virtual = screen_len / linelen;
+ } else {
+ if (hwscroll < 0)
+ var->yres_virtual = 2 * var->yres;
+ else
+ var->yres_virtual = var->yres + hwscroll * 16;
+ }
+ var->xoffset = 0;
+ if (screen_base)
+ var->yoffset = (par->screen_base - screen_base) / linelen;
+ else
+ var->yoffset = 0;
+ var->nonstd = 0;
+ var->activate = 0;
+ var->vmode = FB_VMODE_NONINTERLACED;
+ return 0;
+}
+
+static void stste_get_par(struct atafb_par *par)
+{
+ unsigned long addr;
+ par->hw.st.mode = shifter_tt.st_shiftmode;
+ par->hw.st.sync = shifter.syncmode;
+ addr = ((shifter.bas_hi & 0xff) << 16) |
+ ((shifter.bas_md & 0xff) << 8);
+ if (ATARIHW_PRESENT(EXTD_SHIFTER))
+ addr |= (shifter.bas_lo & 0xff);
+ par->screen_base = atari_stram_to_virt(addr);
+}
+
+static void stste_set_par(struct atafb_par *par)
+{
+ shifter_tt.st_shiftmode = par->hw.st.mode;
+ shifter.syncmode = par->hw.st.sync;
+ /* only set screen_base if really necessary */
+ if (current_par.screen_base != par->screen_base)
+ fbhw->set_screen_base(par->screen_base);
+}
+
+static int stste_setcolreg(unsigned int regno, unsigned int red,
+ unsigned int green, unsigned int blue,
+ unsigned int transp, struct fb_info *info)
+{
+ if (regno > 15)
+ return 1;
+ red >>= 12;
+ blue >>= 12;
+ green >>= 12;
+ if (ATARIHW_PRESENT(EXTD_SHIFTER))
+ shifter_tt.color_reg[regno] =
+ (((red & 0xe) >> 1) | ((red & 1) << 3) << 8) |
+ (((green & 0xe) >> 1) | ((green & 1) << 3) << 4) |
+ ((blue & 0xe) >> 1) | ((blue & 1) << 3);
+ else
+ shifter_tt.color_reg[regno] =
+ ((red & 0xe) << 7) |
+ ((green & 0xe) << 3) |
+ ((blue & 0xe) >> 1);
+ return 0;
+}
+
+static int stste_detect(void)
+{
+ struct atafb_par par;
+
+ /* Determine the connected monitor: The DMA sound must be
+ * disabled before reading the MFP GPIP, because the Sound
+ * Done Signal and the Monochrome Detect are XORed together!
+ */
+ if (ATARIHW_PRESENT(PCM_8BIT)) {
+ tt_dmasnd.ctrl = DMASND_CTRL_OFF;
+ udelay(20); /* wait a while for things to settle down */
+ }
+ mono_moni = (st_mfp.par_dt_reg & 0x80) == 0;
+
+ stste_get_par(&par);
+ stste_encode_var(&atafb_predefined[0], &par);
+
+ if (!ATARIHW_PRESENT(EXTD_SHIFTER))
+ use_hwscroll = 0;
+ return 1;
+}
+
+static void stste_set_screen_base(void *s_base)
+{
+ unsigned long addr;
+ addr = atari_stram_to_phys(s_base);
+ /* Setup Screen Memory */
+ shifter.bas_hi = (unsigned char)((addr & 0xff0000) >> 16);
+ shifter.bas_md = (unsigned char)((addr & 0x00ff00) >> 8);
+ if (ATARIHW_PRESENT(EXTD_SHIFTER))
+ shifter.bas_lo = (unsigned char)(addr & 0x0000ff);
+}
+
+#endif /* ATAFB_STE */
+
+/* Switching the screen size should be done during vsync, otherwise
+ * the margins may get messed up. This is a well known problem of
+ * the ST's video system.
+ *
+ * Unfortunately there is hardly any way to find the vsync, as the
+ * vertical blank interrupt is no longer in time on machines with
+ * overscan type modifications.
+ *
+ * We can, however, use Timer B to safely detect the black shoulder,
+ * but then we've got to guess an appropriate delay to find the vsync.
+ * This might not work on every machine.
+ *
+ * martin_rogge @ ki.maus.de, 8th Aug 1995
+ */
+
+#define LINE_DELAY (mono_moni ? 30 : 70)
+#define SYNC_DELAY (mono_moni ? 1500 : 2000)
+
+/* SWITCH_ACIA may be used for Falcon (ScreenBlaster III internal!) */
+static void st_ovsc_switch(void)
+{
+ unsigned long flags;
+ register unsigned char old, new;
+
+ if (!(atari_switches & ATARI_SWITCH_OVSC_MASK))
+ return;
+ local_irq_save(flags);
+
+ st_mfp.tim_ct_b = 0x10;
+ st_mfp.active_edge |= 8;
+ st_mfp.tim_ct_b = 0;
+ st_mfp.tim_dt_b = 0xf0;
+ st_mfp.tim_ct_b = 8;
+ while (st_mfp.tim_dt_b > 1) /* TOS does it this way, don't ask why */
+ ;
+ new = st_mfp.tim_dt_b;
+ do {
+ udelay(LINE_DELAY);
+ old = new;
+ new = st_mfp.tim_dt_b;
+ } while (old != new);
+ st_mfp.tim_ct_b = 0x10;
+ udelay(SYNC_DELAY);
+
+ if (atari_switches & ATARI_SWITCH_OVSC_IKBD)
+ acia.key_ctrl = ACIA_DIV64 | ACIA_D8N1S | ACIA_RHTID | ACIA_RIE;
+ if (atari_switches & ATARI_SWITCH_OVSC_MIDI)
+ acia.mid_ctrl = ACIA_DIV16 | ACIA_D8N1S | ACIA_RHTID;
+ if (atari_switches & (ATARI_SWITCH_OVSC_SND6|ATARI_SWITCH_OVSC_SND7)) {
+ sound_ym.rd_data_reg_sel = 14;
+ sound_ym.wd_data = sound_ym.rd_data_reg_sel |
+ ((atari_switches & ATARI_SWITCH_OVSC_SND6) ? 0x40:0) |
+ ((atari_switches & ATARI_SWITCH_OVSC_SND7) ? 0x80:0);
+ }
+ local_irq_restore(flags);
+}
+
+/* ------------------- External Video ---------------------- */
+
+#ifdef ATAFB_EXT
+
+static int ext_encode_fix(struct fb_fix_screeninfo *fix, struct atafb_par *par)
+{
+ strcpy(fix->id, "Unknown Extern");
+ fix->smem_start = external_addr;
+ fix->smem_len = PAGE_ALIGN(external_len);
+ if (external_depth == 1) {
+ fix->type = FB_TYPE_PACKED_PIXELS;
+ /* The letters 'n' and 'i' in the "atavideo=external:" stand
+ * for "normal" and "inverted", rsp., in the monochrome case */
+ fix->visual =
+ (external_pmode == FB_TYPE_INTERLEAVED_PLANES ||
+ external_pmode == FB_TYPE_PACKED_PIXELS) ?
+ FB_VISUAL_MONO10 : FB_VISUAL_MONO01;
+ } else {
+ /* Use STATIC if we don't know how to access color registers */
+ int visual = external_vgaiobase ?
+ FB_VISUAL_PSEUDOCOLOR :
+ FB_VISUAL_STATIC_PSEUDOCOLOR;
+ switch (external_pmode) {
+ case -1: /* truecolor */
+ fix->type = FB_TYPE_PACKED_PIXELS;
+ fix->visual = FB_VISUAL_TRUECOLOR;
+ break;
+ case FB_TYPE_PACKED_PIXELS:
+ fix->type = FB_TYPE_PACKED_PIXELS;
+ fix->visual = visual;
+ break;
+ case FB_TYPE_PLANES:
+ fix->type = FB_TYPE_PLANES;
+ fix->visual = visual;
+ break;
+ case FB_TYPE_INTERLEAVED_PLANES:
+ fix->type = FB_TYPE_INTERLEAVED_PLANES;
+ fix->type_aux = 2;
+ fix->visual = visual;
+ break;
+ }
+ }
+ fix->xpanstep = 0;
+ fix->ypanstep = 0;
+ fix->ywrapstep = 0;
+ fix->line_length = par->next_line;
+ return 0;
+}
+
+static int ext_decode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
+{
+ struct fb_var_screeninfo *myvar = &atafb_predefined[0];
+
+ if (var->bits_per_pixel > myvar->bits_per_pixel ||
+ var->xres > myvar->xres ||
+ var->xres_virtual > myvar->xres_virtual ||
+ var->yres > myvar->yres ||
+ var->xoffset > 0 ||
+ var->yoffset > 0)
+ return -EINVAL;
+
+ par->next_line = external_xres_virtual * external_depth / 8;
+ return 0;
+}
+
+static int ext_encode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
+{
+ memset(var, 0, sizeof(struct fb_var_screeninfo));
+ var->red.offset = 0;
+ var->red.length = (external_pmode == -1) ? external_depth / 3 :
+ (external_vgaiobase ? external_bitspercol : 0);
+ var->red.msb_right = 0;
+ var->grayscale = 0;
+
+ var->pixclock = 31041;
+ var->left_margin = 120; /* these are surely incorrect */
+ var->right_margin = 100;
+ var->upper_margin = 8;
+ var->lower_margin = 16;
+ var->hsync_len = 140;
+ var->vsync_len = 30;
+
+ var->height = -1;
+ var->width = -1;
+
+ var->sync = 0;
+
+ var->xres = external_xres;
+ var->yres = external_yres;
+ var->xres_virtual = external_xres_virtual;
+ var->bits_per_pixel = external_depth;
+
+ var->blue = var->green = var->red;
+ var->transp.offset = 0;
+ var->transp.length = 0;
+ var->transp.msb_right = 0;
+ var->yres_virtual = var->yres;
+ var->xoffset = 0;
+ var->yoffset = 0;
+ var->nonstd = 0;
+ var->activate = 0;
+ var->vmode = FB_VMODE_NONINTERLACED;
+ return 0;
+}
+
+static void ext_get_par(struct atafb_par *par)
+{
+ par->screen_base = external_screen_base;
+}
+
+static void ext_set_par(struct atafb_par *par)
+{
+}
+
+#define OUTB(port,val) \
+ *((unsigned volatile char *) ((port)+external_vgaiobase)) = (val)
+#define INB(port) \
+ (*((unsigned volatile char *) ((port)+external_vgaiobase)))
+#define DACDelay \
+ do { \
+ unsigned char tmp = INB(0x3da); \
+ tmp = INB(0x3da); \
+ } while (0)
+
+static int ext_setcolreg(unsigned int regno, unsigned int red,
+ unsigned int green, unsigned int blue,
+ unsigned int transp, struct fb_info *info)
+{
+ unsigned char colmask = (1 << external_bitspercol) - 1;
+
+ if (!external_vgaiobase)
+ return 1;
+
+ if (regno > 255)
+ return 1;
+
+ switch (external_card_type) {
+ case IS_VGA:
+ OUTB(0x3c8, regno);
+ DACDelay;
+ OUTB(0x3c9, red & colmask);
+ DACDelay;
+ OUTB(0x3c9, green & colmask);
+ DACDelay;
+ OUTB(0x3c9, blue & colmask);
+ DACDelay;
+ return 0;
+
+ case IS_MV300:
+ OUTB((MV300_reg[regno] << 2) + 1, red);
+ OUTB((MV300_reg[regno] << 2) + 1, green);
+ OUTB((MV300_reg[regno] << 2) + 1, blue);
+ return 0;
+
+ default:
+ return 1;
+ }
+}
+
+static int ext_detect(void)
+{
+ struct fb_var_screeninfo *myvar = &atafb_predefined[0];
+ struct atafb_par dummy_par;
+
+ myvar->xres = external_xres;
+ myvar->xres_virtual = external_xres_virtual;
+ myvar->yres = external_yres;
+ myvar->bits_per_pixel = external_depth;
+ ext_encode_var(myvar, &dummy_par);
+ return 1;
+}
+
+#endif /* ATAFB_EXT */
+
+/* ------ This is the same for most hardware types -------- */
+
+static void set_screen_base(void *s_base)
+{
+ unsigned long addr;
+
+ addr = atari_stram_to_phys(s_base);
+ /* Setup Screen Memory */
+ shifter.bas_hi = (unsigned char)((addr & 0xff0000) >> 16);
+ shifter.bas_md = (unsigned char)((addr & 0x00ff00) >> 8);
+ shifter.bas_lo = (unsigned char)(addr & 0x0000ff);
+}
+
+static int pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+ struct atafb_par *par = (struct atafb_par *)info->par;
+
+ if (!fbhw->set_screen_base ||
+ (!ATARIHW_PRESENT(EXTD_SHIFTER) && var->xoffset))
+ return -EINVAL;
+ var->xoffset = up(var->xoffset, 16);
+ par->screen_base = screen_base +
+ (var->yoffset * info->var.xres_virtual + var->xoffset)
+ * info->var.bits_per_pixel / 8;
+ fbhw->set_screen_base(par->screen_base);
+ return 0;
+}
+
+/* ------------ Interfaces to hardware functions ------------ */
+
+#ifdef ATAFB_TT
+static struct fb_hwswitch tt_switch = {
+ .detect = tt_detect,
+ .encode_fix = tt_encode_fix,
+ .decode_var = tt_decode_var,
+ .encode_var = tt_encode_var,
+ .get_par = tt_get_par,
+ .set_par = tt_set_par,
+ .set_screen_base = set_screen_base,
+ .pan_display = pan_display,
+};
+#endif
+
+#ifdef ATAFB_FALCON
+static struct fb_hwswitch falcon_switch = {
+ .detect = falcon_detect,
+ .encode_fix = falcon_encode_fix,
+ .decode_var = falcon_decode_var,
+ .encode_var = falcon_encode_var,
+ .get_par = falcon_get_par,
+ .set_par = falcon_set_par,
+ .set_screen_base = set_screen_base,
+ .blank = falcon_blank,
+ .pan_display = falcon_pan_display,
+};
+#endif
+
+#ifdef ATAFB_STE
+static struct fb_hwswitch st_switch = {
+ .detect = stste_detect,
+ .encode_fix = stste_encode_fix,
+ .decode_var = stste_decode_var,
+ .encode_var = stste_encode_var,
+ .get_par = stste_get_par,
+ .set_par = stste_set_par,
+ .set_screen_base = stste_set_screen_base,
+ .pan_display = pan_display
+};
+#endif
+
+#ifdef ATAFB_EXT
+static struct fb_hwswitch ext_switch = {
+ .detect = ext_detect,
+ .encode_fix = ext_encode_fix,
+ .decode_var = ext_decode_var,
+ .encode_var = ext_encode_var,
+ .get_par = ext_get_par,
+ .set_par = ext_set_par,
+};
+#endif
+
+static void ata_get_par(struct atafb_par *par)
+{
+ if (current_par_valid)
+ *par = current_par;
+ else
+ fbhw->get_par(par);
+}
+
+static void ata_set_par(struct atafb_par *par)
+{
+ fbhw->set_par(par);
+ current_par = *par;
+ current_par_valid = 1;
+}
+
+
+/* =========================================================== */
+/* ============== Hardware Independent Functions ============= */
+/* =========================================================== */
+
+/* used for hardware scrolling */
+
+static int do_fb_set_var(struct fb_var_screeninfo *var, int isactive)
+{
+ int err, activate;
+ struct atafb_par par;
+
+ err = fbhw->decode_var(var, &par);
+ if (err)
+ return err;
+ activate = var->activate;
+ if (((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) && isactive)
+ ata_set_par(&par);
+ fbhw->encode_var(var, &par);
+ var->activate = activate;
+ return 0;
+}
+
+/* fbhw->encode_fix() must be called with fb_info->mm_lock held
+ * if it is called after the register_framebuffer() - not a case here
+ */
+static int atafb_get_fix(struct fb_fix_screeninfo *fix, struct fb_info *info)
+{
+ struct atafb_par par;
+ int err;
+ // Get fix directly (case con == -1 before)??
+ err = fbhw->decode_var(&info->var, &par);
+ if (err)
+ return err;
+ memset(fix, 0, sizeof(struct fb_fix_screeninfo));
+ err = fbhw->encode_fix(fix, &par);
+ return err;
+}
+
+static int atafb_get_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+ struct atafb_par par;
+
+ ata_get_par(&par);
+ fbhw->encode_var(var, &par);
+
+ return 0;
+}
+
+// No longer called by fbcon!
+// Still called by set_var internally
+
+static void atafb_set_disp(struct fb_info *info)
+{
+ atafb_get_var(&info->var, info);
+ atafb_get_fix(&info->fix, info);
+
+ /* Note: smem_start derives from phys_screen_base, not screen_base! */
+ info->screen_base = (external_addr ? external_screen_base :
+ atari_stram_to_virt(info->fix.smem_start));
+}
+
+static int atafb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+ u_int transp, struct fb_info *info)
+{
+ red >>= 8;
+ green >>= 8;
+ blue >>= 8;
+
+ return info->fbops->fb_setcolreg(regno, red, green, blue, transp, info);
+}
+
+static int
+atafb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+ int xoffset = var->xoffset;
+ int yoffset = var->yoffset;
+ int err;
+
+ if (var->vmode & FB_VMODE_YWRAP) {
+ if (yoffset < 0 || yoffset >= info->var.yres_virtual || xoffset)
+ return -EINVAL;
+ } else {
+ if (xoffset + info->var.xres > info->var.xres_virtual ||
+ yoffset + info->var.yres > info->var.yres_virtual)
+ return -EINVAL;
+ }
+
+ if (fbhw->pan_display) {
+ err = fbhw->pan_display(var, info);
+ if (err)
+ return err;
+ } else
+ return -EINVAL;
+
+ info->var.xoffset = xoffset;
+ info->var.yoffset = yoffset;
+
+ if (var->vmode & FB_VMODE_YWRAP)
+ info->var.vmode |= FB_VMODE_YWRAP;
+ else
+ info->var.vmode &= ~FB_VMODE_YWRAP;
+
+ return 0;
+}
+
+/*
+ * generic drawing routines; imageblit needs updating for image depth > 1
+ */
+
+#if BITS_PER_LONG == 32
+#define BYTES_PER_LONG 4
+#define SHIFT_PER_LONG 5
+#elif BITS_PER_LONG == 64
+#define BYTES_PER_LONG 8
+#define SHIFT_PER_LONG 6
+#else
+#define Please update me
+#endif
+
+
+static void atafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
+{
+ struct atafb_par *par = (struct atafb_par *)info->par;
+ int x2, y2;
+ u32 width, height;
+
+ if (!rect->width || !rect->height)
+ return;
+
+#ifdef ATAFB_FALCON
+ if (info->var.bits_per_pixel == 16) {
+ cfb_fillrect(info, rect);
+ return;
+ }
+#endif
+
+ /*
+ * We could use hardware clipping but on many cards you get around
+ * hardware clipping by writing to framebuffer directly.
+ * */
+ x2 = rect->dx + rect->width;
+ y2 = rect->dy + rect->height;
+ x2 = x2 < info->var.xres_virtual ? x2 : info->var.xres_virtual;
+ y2 = y2 < info->var.yres_virtual ? y2 : info->var.yres_virtual;
+ width = x2 - rect->dx;
+ height = y2 - rect->dy;
+
+ if (info->var.bits_per_pixel == 1)
+ atafb_mfb_fillrect(info, par->next_line, rect->color,
+ rect->dy, rect->dx, height, width);
+ else if (info->var.bits_per_pixel == 2)
+ atafb_iplan2p2_fillrect(info, par->next_line, rect->color,
+ rect->dy, rect->dx, height, width);
+ else if (info->var.bits_per_pixel == 4)
+ atafb_iplan2p4_fillrect(info, par->next_line, rect->color,
+ rect->dy, rect->dx, height, width);
+ else
+ atafb_iplan2p8_fillrect(info, par->next_line, rect->color,
+ rect->dy, rect->dx, height, width);
+
+ return;
+}
+
+static void atafb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
+{
+ struct atafb_par *par = (struct atafb_par *)info->par;
+ int x2, y2;
+ u32 dx, dy, sx, sy, width, height;
+ int rev_copy = 0;
+
+#ifdef ATAFB_FALCON
+ if (info->var.bits_per_pixel == 16) {
+ cfb_copyarea(info, area);
+ return;
+ }
+#endif
+
+ /* clip the destination */
+ x2 = area->dx + area->width;
+ y2 = area->dy + area->height;
+ dx = area->dx > 0 ? area->dx : 0;
+ dy = area->dy > 0 ? area->dy : 0;
+ x2 = x2 < info->var.xres_virtual ? x2 : info->var.xres_virtual;
+ y2 = y2 < info->var.yres_virtual ? y2 : info->var.yres_virtual;
+ width = x2 - dx;
+ height = y2 - dy;
+
+ if (area->sx + dx < area->dx || area->sy + dy < area->dy)
+ return;
+
+ /* update sx,sy */
+ sx = area->sx + (dx - area->dx);
+ sy = area->sy + (dy - area->dy);
+
+ /* the source must be completely inside the virtual screen */
+ if (sx + width > info->var.xres_virtual ||
+ sy + height > info->var.yres_virtual)
+ return;
+
+ if (dy > sy || (dy == sy && dx > sx)) {
+ dy += height;
+ sy += height;
+ rev_copy = 1;
+ }
+
+ if (info->var.bits_per_pixel == 1)
+ atafb_mfb_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
+ else if (info->var.bits_per_pixel == 2)
+ atafb_iplan2p2_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
+ else if (info->var.bits_per_pixel == 4)
+ atafb_iplan2p4_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
+ else
+ atafb_iplan2p8_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
+
+ return;
+}
+
+static void atafb_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+ struct atafb_par *par = (struct atafb_par *)info->par;
+ int x2, y2;
+ unsigned long *dst;
+ int dst_idx;
+ const char *src;
+ u32 dx, dy, width, height, pitch;
+
+#ifdef ATAFB_FALCON
+ if (info->var.bits_per_pixel == 16) {
+ cfb_imageblit(info, image);
+ return;
+ }
+#endif
+
+ /*
+ * We could use hardware clipping but on many cards you get around
+ * hardware clipping by writing to framebuffer directly like we are
+ * doing here.
+ */
+ x2 = image->dx + image->width;
+ y2 = image->dy + image->height;
+ dx = image->dx;
+ dy = image->dy;
+ x2 = x2 < info->var.xres_virtual ? x2 : info->var.xres_virtual;
+ y2 = y2 < info->var.yres_virtual ? y2 : info->var.yres_virtual;
+ width = x2 - dx;
+ height = y2 - dy;
+
+ if (image->depth == 1) {
+ // used for font data
+ dst = (unsigned long *)
+ ((unsigned long)info->screen_base & ~(BYTES_PER_LONG - 1));
+ dst_idx = ((unsigned long)info->screen_base & (BYTES_PER_LONG - 1)) * 8;
+ dst_idx += dy * par->next_line * 8 + dx;
+ src = image->data;
+ pitch = (image->width + 7) / 8;
+ while (height--) {
+
+ if (info->var.bits_per_pixel == 1)
+ atafb_mfb_linefill(info, par->next_line,
+ dy, dx, width, src,
+ image->bg_color, image->fg_color);
+ else if (info->var.bits_per_pixel == 2)
+ atafb_iplan2p2_linefill(info, par->next_line,
+ dy, dx, width, src,
+ image->bg_color, image->fg_color);
+ else if (info->var.bits_per_pixel == 4)
+ atafb_iplan2p4_linefill(info, par->next_line,
+ dy, dx, width, src,
+ image->bg_color, image->fg_color);
+ else
+ atafb_iplan2p8_linefill(info, par->next_line,
+ dy, dx, width, src,
+ image->bg_color, image->fg_color);
+ dy++;
+ src += pitch;
+ }
+ } else {
+ c2p_iplan2(info->screen_base, image->data, dx, dy, width,
+ height, par->next_line, image->width,
+ info->var.bits_per_pixel);
+ }
+}
+
+static int
+atafb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
+{
+ switch (cmd) {
+#ifdef FBCMD_GET_CURRENTPAR
+ case FBCMD_GET_CURRENTPAR:
+ if (copy_to_user((void *)arg, (void *)¤t_par,
+ sizeof(struct atafb_par)))
+ return -EFAULT;
+ return 0;
+#endif
+#ifdef FBCMD_SET_CURRENTPAR
+ case FBCMD_SET_CURRENTPAR:
+ if (copy_from_user((void *)¤t_par, (void *)arg,
+ sizeof(struct atafb_par)))
+ return -EFAULT;
+ ata_set_par(¤t_par);
+ return 0;
+#endif
+ }
+ return -EINVAL;
+}
+
+/* (un)blank/poweroff
+ * 0 = unblank
+ * 1 = blank
+ * 2 = suspend vsync
+ * 3 = suspend hsync
+ * 4 = off
+ */
+static int atafb_blank(int blank, struct fb_info *info)
+{
+ unsigned short black[16];
+ struct fb_cmap cmap;
+ if (fbhw->blank && !fbhw->blank(blank))
+ return 1;
+ if (blank) {
+ memset(black, 0, 16 * sizeof(unsigned short));
+ cmap.red = black;
+ cmap.green = black;
+ cmap.blue = black;
+ cmap.transp = NULL;
+ cmap.start = 0;
+ cmap.len = 16;
+ fb_set_cmap(&cmap, info);
+ }
+#if 0
+ else
+ do_install_cmap(info);
+#endif
+ return 0;
+}
+
+ /*
+ * New fbcon interface ...
+ */
+
+ /* check var by decoding var into hw par, rounding if necessary,
+ * then encoding hw par back into new, validated var */
+static int atafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+ int err;
+ struct atafb_par par;
+
+ /* Validate wanted screen parameters */
+ // if ((err = ata_decode_var(var, &par)))
+ err = fbhw->decode_var(var, &par);
+ if (err)
+ return err;
+
+ /* Encode (possibly rounded) screen parameters */
+ fbhw->encode_var(var, &par);
+ return 0;
+}
+
+ /* actually set hw par by decoding var, then setting hardware from
+ * hw par just decoded */
+static int atafb_set_par(struct fb_info *info)
+{
+ struct atafb_par *par = (struct atafb_par *)info->par;
+
+ /* Decode wanted screen parameters */
+ fbhw->decode_var(&info->var, par);
+ mutex_lock(&info->mm_lock);
+ fbhw->encode_fix(&info->fix, par);
+ mutex_unlock(&info->mm_lock);
+
+ /* Set new videomode */
+ ata_set_par(par);
+
+ return 0;
+}
+
+
+static struct fb_ops atafb_ops = {
+ .owner = THIS_MODULE,
+ .fb_check_var = atafb_check_var,
+ .fb_set_par = atafb_set_par,
+ .fb_setcolreg = atafb_setcolreg,
+ .fb_blank = atafb_blank,
+ .fb_pan_display = atafb_pan_display,
+ .fb_fillrect = atafb_fillrect,
+ .fb_copyarea = atafb_copyarea,
+ .fb_imageblit = atafb_imageblit,
+ .fb_ioctl = atafb_ioctl,
+};
+
+static void check_default_par(int detected_mode)
+{
+ char default_name[10];
+ int i;
+ struct fb_var_screeninfo var;
+ unsigned long min_mem;
+
+ /* First try the user supplied mode */
+ if (default_par) {
+ var = atafb_predefined[default_par - 1];
+ var.activate = FB_ACTIVATE_TEST;
+ if (do_fb_set_var(&var, 1))
+ default_par = 0; /* failed */
+ }
+ /* Next is the autodetected one */
+ if (!default_par) {
+ var = atafb_predefined[detected_mode - 1]; /* autodetect */
+ var.activate = FB_ACTIVATE_TEST;
+ if (!do_fb_set_var(&var, 1))
+ default_par = detected_mode;
+ }
+ /* If that also failed, try some default modes... */
+ if (!default_par) {
+ /* try default1, default2... */
+ for (i = 1; i < 10; i++) {
+ sprintf(default_name,"default%d", i);
+ default_par = get_video_mode(default_name);
+ if (!default_par)
+ panic("can't set default video mode");
+ var = atafb_predefined[default_par - 1];
+ var.activate = FB_ACTIVATE_TEST;
+ if (!do_fb_set_var(&var,1))
+ break; /* ok */
+ }
+ }
+ min_mem = var.xres_virtual * var.yres_virtual * var.bits_per_pixel / 8;
+ if (default_mem_req < min_mem)
+ default_mem_req = min_mem;
+}
+
+#ifdef ATAFB_EXT
+static void __init atafb_setup_ext(char *spec)
+{
+ int xres, xres_virtual, yres, depth, planes;
+ unsigned long addr, len;
+ char *p;
+
+ /* Format is: <xres>;<yres>;<depth>;<plane organ.>;
+ * <screen mem addr>
+ * [;<screen mem length>[;<vgaiobase>[;<bits-per-col>[;<colorreg-type>
+ * [;<xres-virtual>]]]]]
+ *
+ * 09/23/97 Juergen
+ * <xres_virtual>: hardware's x-resolution (f.e. ProMST)
+ *
+ * Even xres_virtual is available, we neither support panning nor hw-scrolling!
+ */
+ p = strsep(&spec, ";");
+ if (!p || !*p)
+ return;
+ xres_virtual = xres = simple_strtoul(p, NULL, 10);
+ if (xres <= 0)
+ return;
+
+ p = strsep(&spec, ";");
+ if (!p || !*p)
+ return;
+ yres = simple_strtoul(p, NULL, 10);
+ if (yres <= 0)
+ return;
+
+ p = strsep(&spec, ";");
+ if (!p || !*p)
+ return;
+ depth = simple_strtoul(p, NULL, 10);
+ if (depth != 1 && depth != 2 && depth != 4 && depth != 8 &&
+ depth != 16 && depth != 24)
+ return;
+
+ p = strsep(&spec, ";");
+ if (!p || !*p)
+ return;
+ if (*p == 'i')
+ planes = FB_TYPE_INTERLEAVED_PLANES;
+ else if (*p == 'p')
+ planes = FB_TYPE_PACKED_PIXELS;
+ else if (*p == 'n')
+ planes = FB_TYPE_PLANES;
+ else if (*p == 't')
+ planes = -1; /* true color */
+ else
+ return;
+
+ p = strsep(&spec, ";");
+ if (!p || !*p)
+ return;
+ addr = simple_strtoul(p, NULL, 0);
+
+ p = strsep(&spec, ";");
+ if (!p || !*p)
+ len = xres * yres * depth / 8;
+ else
+ len = simple_strtoul(p, NULL, 0);
+
+ p = strsep(&spec, ";");
+ if (p && *p)
+ external_vgaiobase = simple_strtoul(p, NULL, 0);
+
+ p = strsep(&spec, ";");
+ if (p && *p) {
+ external_bitspercol = simple_strtoul(p, NULL, 0);
+ if (external_bitspercol > 8)
+ external_bitspercol = 8;
+ else if (external_bitspercol < 1)
+ external_bitspercol = 1;
+ }
+
+ p = strsep(&spec, ";");
+ if (p && *p) {
+ if (!strcmp(p, "vga"))
+ external_card_type = IS_VGA;
+ if (!strcmp(p, "mv300"))
+ external_card_type = IS_MV300;
+ }
+
+ p = strsep(&spec, ";");
+ if (p && *p) {
+ xres_virtual = simple_strtoul(p, NULL, 10);
+ if (xres_virtual < xres)
+ xres_virtual = xres;
+ if (xres_virtual * yres * depth / 8 > len)
+ len = xres_virtual * yres * depth / 8;
+ }
+
+ external_xres = xres;
+ external_xres_virtual = xres_virtual;
+ external_yres = yres;
+ external_depth = depth;
+ external_pmode = planes;
+ external_addr = addr;
+ external_len = len;
+
+ if (external_card_type == IS_MV300) {
+ switch (external_depth) {
+ case 1:
+ MV300_reg = MV300_reg_1bit;
+ break;
+ case 4:
+ MV300_reg = MV300_reg_4bit;
+ break;
+ case 8:
+ MV300_reg = MV300_reg_8bit;
+ break;
+ }
+ }
+}
+#endif /* ATAFB_EXT */
+
+static void __init atafb_setup_int(char *spec)
+{
+ /* Format to config extended internal video hardware like OverScan:
+ * "internal:<xres>;<yres>;<xres_max>;<yres_max>;<offset>"
+ * Explanation:
+ * <xres>: x-resolution
+ * <yres>: y-resolution
+ * The following are only needed if you have an overscan which
+ * needs a black border:
+ * <xres_max>: max. length of a line in pixels your OverScan hardware would allow
+ * <yres_max>: max. number of lines your OverScan hardware would allow
+ * <offset>: Offset from physical beginning to visible beginning
+ * of screen in bytes
+ */
+ int xres;
+ char *p;
+
+ if (!(p = strsep(&spec, ";")) || !*p)
+ return;
+ xres = simple_strtoul(p, NULL, 10);
+ if (!(p = strsep(&spec, ";")) || !*p)
+ return;
+ sttt_xres = xres;
+ tt_yres = st_yres = simple_strtoul(p, NULL, 10);
+ if ((p = strsep(&spec, ";")) && *p)
+ sttt_xres_virtual = simple_strtoul(p, NULL, 10);
+ if ((p = strsep(&spec, ";")) && *p)
+ sttt_yres_virtual = simple_strtoul(p, NULL, 0);
+ if ((p = strsep(&spec, ";")) && *p)
+ ovsc_offset = simple_strtoul(p, NULL, 0);
+
+ if (ovsc_offset || (sttt_yres_virtual != st_yres))
+ use_hwscroll = 0;
+}
+
+#ifdef ATAFB_FALCON
+static void __init atafb_setup_mcap(char *spec)
+{
+ char *p;
+ int vmin, vmax, hmin, hmax;
+
+ /* Format for monitor capabilities is: <Vmin>;<Vmax>;<Hmin>;<Hmax>
+ * <V*> vertical freq. in Hz
+ * <H*> horizontal freq. in kHz
+ */
+ if (!(p = strsep(&spec, ";")) || !*p)
+ return;
+ vmin = simple_strtoul(p, NULL, 10);
+ if (vmin <= 0)
+ return;
+ if (!(p = strsep(&spec, ";")) || !*p)
+ return;
+ vmax = simple_strtoul(p, NULL, 10);
+ if (vmax <= 0 || vmax <= vmin)
+ return;
+ if (!(p = strsep(&spec, ";")) || !*p)
+ return;
+ hmin = 1000 * simple_strtoul(p, NULL, 10);
+ if (hmin <= 0)
+ return;
+ if (!(p = strsep(&spec, "")) || !*p)
+ return;
+ hmax = 1000 * simple_strtoul(p, NULL, 10);
+ if (hmax <= 0 || hmax <= hmin)
+ return;
+
+ fb_info.monspecs.vfmin = vmin;
+ fb_info.monspecs.vfmax = vmax;
+ fb_info.monspecs.hfmin = hmin;
+ fb_info.monspecs.hfmax = hmax;
+}
+#endif /* ATAFB_FALCON */
+
+static void __init atafb_setup_user(char *spec)
+{
+ /* Format of user defined video mode is: <xres>;<yres>;<depth>
+ */
+ char *p;
+ int xres, yres, depth, temp;
+
+ p = strsep(&spec, ";");
+ if (!p || !*p)
+ return;
+ xres = simple_strtoul(p, NULL, 10);
+ p = strsep(&spec, ";");
+ if (!p || !*p)
+ return;
+ yres = simple_strtoul(p, NULL, 10);
+ p = strsep(&spec, "");
+ if (!p || !*p)
+ return;
+ depth = simple_strtoul(p, NULL, 10);
+ temp = get_video_mode("user0");
+ if (temp) {
+ default_par = temp;
+ atafb_predefined[default_par - 1].xres = xres;
+ atafb_predefined[default_par - 1].yres = yres;
+ atafb_predefined[default_par - 1].bits_per_pixel = depth;
+ }
+}
+
+int __init atafb_setup(char *options)
+{
+ char *this_opt;
+ int temp;
+
+ if (!options || !*options)
+ return 0;
+
+ while ((this_opt = strsep(&options, ",")) != NULL) {
+ if (!*this_opt)
+ continue;
+ if ((temp = get_video_mode(this_opt))) {
+ default_par = temp;
+ mode_option = this_opt;
+ } else if (!strcmp(this_opt, "inverse"))
+ inverse = 1;
+ else if (!strncmp(this_opt, "hwscroll_", 9)) {
+ hwscroll = simple_strtoul(this_opt + 9, NULL, 10);
+ if (hwscroll < 0)
+ hwscroll = 0;
+ if (hwscroll > 200)
+ hwscroll = 200;
+ }
+#ifdef ATAFB_EXT
+ else if (!strcmp(this_opt, "mv300")) {
+ external_bitspercol = 8;
+ external_card_type = IS_MV300;
+ } else if (!strncmp(this_opt, "external:", 9))
+ atafb_setup_ext(this_opt + 9);
+#endif
+ else if (!strncmp(this_opt, "internal:", 9))
+ atafb_setup_int(this_opt + 9);
+#ifdef ATAFB_FALCON
+ else if (!strncmp(this_opt, "eclock:", 7)) {
+ fext.f = simple_strtoul(this_opt + 7, NULL, 10);
+ /* external pixelclock in kHz --> ps */
+ fext.t = 1000000000 / fext.f;
+ fext.f *= 1000;
+ } else if (!strncmp(this_opt, "monitorcap:", 11))
+ atafb_setup_mcap(this_opt + 11);
+#endif
+ else if (!strcmp(this_opt, "keep"))
+ DontCalcRes = 1;
+ else if (!strncmp(this_opt, "R", 1))
+ atafb_setup_user(this_opt + 1);
+ }
+ return 0;
+}
+
+int __init atafb_init(void)
+{
+ int pad, detected_mode, error;
+ unsigned int defmode = 0;
+ unsigned long mem_req;
+
+#ifndef MODULE
+ char *option = NULL;
+
+ if (fb_get_options("atafb", &option))
+ return -ENODEV;
+ atafb_setup(option);
+#endif
+ printk("atafb_init: start\n");
+
+ if (!MACH_IS_ATARI)
+ return -ENODEV;
+
+ do {
+#ifdef ATAFB_EXT
+ if (external_addr) {
+ printk("atafb_init: initializing external hw\n");
+ fbhw = &ext_switch;
+ atafb_ops.fb_setcolreg = &ext_setcolreg;
+ defmode = DEFMODE_EXT;
+ break;
+ }
+#endif
+#ifdef ATAFB_TT
+ if (ATARIHW_PRESENT(TT_SHIFTER)) {
+ printk("atafb_init: initializing TT hw\n");
+ fbhw = &tt_switch;
+ atafb_ops.fb_setcolreg = &tt_setcolreg;
+ defmode = DEFMODE_TT;
+ break;
+ }
+#endif
+#ifdef ATAFB_FALCON
+ if (ATARIHW_PRESENT(VIDEL_SHIFTER)) {
+ printk("atafb_init: initializing Falcon hw\n");
+ fbhw = &falcon_switch;
+ atafb_ops.fb_setcolreg = &falcon_setcolreg;
+ error = request_irq(IRQ_AUTO_4, falcon_vbl_switcher, 0,
+ "framebuffer:modeswitch",
+ falcon_vbl_switcher);
+ if (error)
+ return error;
+ defmode = DEFMODE_F30;
+ break;
+ }
+#endif
+#ifdef ATAFB_STE
+ if (ATARIHW_PRESENT(STND_SHIFTER) ||
+ ATARIHW_PRESENT(EXTD_SHIFTER)) {
+ printk("atafb_init: initializing ST/E hw\n");
+ fbhw = &st_switch;
+ atafb_ops.fb_setcolreg = &stste_setcolreg;
+ defmode = DEFMODE_STE;
+ break;
+ }
+ fbhw = &st_switch;
+ atafb_ops.fb_setcolreg = &stste_setcolreg;
+ printk("Cannot determine video hardware; defaulting to ST(e)\n");
+#else /* ATAFB_STE */
+ /* no default driver included */
+ /* Nobody will ever see this message :-) */
+ panic("Cannot initialize video hardware");
+#endif
+ } while (0);
+
+ /* Multisync monitor capabilities */
+ /* Atari-TOS defaults if no boot option present */
+ if (fb_info.monspecs.hfmin == 0) {
+ fb_info.monspecs.hfmin = 31000;
+ fb_info.monspecs.hfmax = 32000;
+ fb_info.monspecs.vfmin = 58;
+ fb_info.monspecs.vfmax = 62;
+ }
+
+ detected_mode = fbhw->detect();
+ check_default_par(detected_mode);
+#ifdef ATAFB_EXT
+ if (!external_addr) {
+#endif /* ATAFB_EXT */
+ mem_req = default_mem_req + ovsc_offset + ovsc_addlen;
+ mem_req = PAGE_ALIGN(mem_req) + PAGE_SIZE;
+ screen_base = atari_stram_alloc(mem_req, "atafb");
+ if (!screen_base)
+ panic("Cannot allocate screen memory");
+ memset(screen_base, 0, mem_req);
+ pad = -(unsigned long)screen_base & (PAGE_SIZE - 1);
+ screen_base += pad;
+ phys_screen_base = atari_stram_to_phys(screen_base + ovsc_offset);
+ screen_len = (mem_req - pad - ovsc_offset) & PAGE_MASK;
+ st_ovsc_switch();
+ if (CPU_IS_040_OR_060) {
+ /* On a '040+, the cache mode of video RAM must be set to
+ * write-through also for internal video hardware! */
+ cache_push(atari_stram_to_phys(screen_base), screen_len);
+ kernel_set_cachemode(screen_base, screen_len,
+ IOMAP_WRITETHROUGH);
+ }
+ printk("atafb: screen_base %p phys_screen_base %lx screen_len %d\n",
+ screen_base, phys_screen_base, screen_len);
+#ifdef ATAFB_EXT
+ } else {
+ /* Map the video memory (physical address given) to somewhere
+ * in the kernel address space.
+ */
+ external_screen_base = ioremap_wt(external_addr, external_len);
+ if (external_vgaiobase)
+ external_vgaiobase =
+ (unsigned long)ioremap(external_vgaiobase, 0x10000);
+ screen_base = external_screen_base;
+ phys_screen_base = external_addr;
+ screen_len = external_len & PAGE_MASK;
+ memset (screen_base, 0, external_len);
+ }
+#endif /* ATAFB_EXT */
+
+// strcpy(fb_info.mode->name, "Atari Builtin ");
+ fb_info.fbops = &atafb_ops;
+ // try to set default (detected; requested) var
+ do_fb_set_var(&atafb_predefined[default_par - 1], 1);
+ // reads hw state into current par, which may not be sane yet
+ ata_get_par(¤t_par);
+ fb_info.par = ¤t_par;
+ // tries to read from HW which may not be initialized yet
+ // so set sane var first, then call atafb_set_par
+ atafb_get_var(&fb_info.var, &fb_info);
+
+#ifdef ATAFB_FALCON
+ fb_info.pseudo_palette = current_par.hw.falcon.pseudo_palette;
+#endif
+ fb_info.flags = FBINFO_FLAG_DEFAULT;
+
+ if (!fb_find_mode(&fb_info.var, &fb_info, mode_option, atafb_modedb,
+ NUM_TOTAL_MODES, &atafb_modedb[defmode],
+ fb_info.var.bits_per_pixel)) {
+ return -EINVAL;
+ }
+
+ fb_videomode_to_modelist(atafb_modedb, NUM_TOTAL_MODES,
+ &fb_info.modelist);
+
+ atafb_set_disp(&fb_info);
+
+ fb_alloc_cmap(&(fb_info.cmap), 1 << fb_info.var.bits_per_pixel, 0);
+
+
+ printk("Determined %dx%d, depth %d\n",
+ fb_info.var.xres, fb_info.var.yres, fb_info.var.bits_per_pixel);
+ if ((fb_info.var.xres != fb_info.var.xres_virtual) ||
+ (fb_info.var.yres != fb_info.var.yres_virtual))
+ printk(" virtual %dx%d\n", fb_info.var.xres_virtual,
+ fb_info.var.yres_virtual);
+
+ if (register_framebuffer(&fb_info) < 0) {
+#ifdef ATAFB_EXT
+ if (external_addr) {
+ iounmap(external_screen_base);
+ external_addr = 0;
+ }
+ if (external_vgaiobase) {
+ iounmap((void*)external_vgaiobase);
+ external_vgaiobase = 0;
+ }
+#endif
+ return -EINVAL;
+ }
+
+ fb_info(&fb_info, "frame buffer device, using %dK of video memory\n",
+ screen_len >> 10);
+
+ /* TODO: This driver cannot be unloaded yet */
+ return 0;
+}
+
+module_init(atafb_init);
+
+#ifdef MODULE
+MODULE_LICENSE("GPL");
+
+int cleanup_module(void)
+{
+ unregister_framebuffer(&fb_info);
+ return atafb_deinit();
+}
+#endif /* MODULE */