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/* * 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/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 <linux/platform_device.h> #include <asm/setup.h> #include <linux/uaccess.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 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 */ /* * 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 }, { /* 640x200, 15 kHz, 60 Hz (ST medium) */ "st-mid", 60, 640, 200, 32000, 32, 16, 31, 14, 96, 4, 0, FB_VMODE_NONINTERLACED }, { /* 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 }, { /* 320x480, 15 kHz, 60 Hz (TT low) */ "tt-low", 60, 320, 480, 31041, 120, 100, 8, 16, 140, 30, 0, FB_VMODE_NONINTERLACED }, { /* 640x480, 29 kHz, 57 Hz (TT medium) */ "tt-mid", 60, 640, 480, 31041, 120, 100, 8, 16, 140, 30, 0, FB_VMODE_NONINTERLACED }, { /* 1280x960, 72 kHz, 72 Hz (TT high) */ "tt-high", 72, 1280, 960, 7760, 260, 60, 36, 4, 192, 4, 0, FB_VMODE_NONINTERLACED }, /* * VGA Video Modes */ { /* 640x480, 31 kHz, 60 Hz (VGA) */ "vga", 60, 640, 480, 39721, 42, 18, 31, 11, 100, 3, 0, FB_VMODE_NONINTERLACED }, { /* 640x400, 31 kHz, 70 Hz (VGA) */ "vga70", 70, 640, 400, 39721, 42, 18, 31, 11, 100, 3, FB_SYNC_VERT_HIGH_ACT | FB_SYNC_COMP_HIGH_ACT, FB_VMODE_NONINTERLACED }, /* * 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 }, }; #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_st.syncmode; addr = ((shifter_st.bas_hi & 0xff) << 16) | ((shifter_st.bas_md & 0xff) << 8) | ((shifter_st.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_st.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; 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) { /* 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; 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_st.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_st.bas_hi & 0xff) << 16 | (shifter_st.bas_md & 0xff) << 8 | (shifter_st.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_st.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 = info->par; int xoffset; int bpp = info->var.bits_per_pixel; if (bpp == 1) var->xoffset = round_up(var->xoffset, 32); if (bpp != 16) par->hw.falcon.xoffset = var->xoffset & 15; else { par->hw.falcon.xoffset = 0; var->xoffset = round_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_st.syncmode; addr = ((shifter_st.bas_hi & 0xff) << 16) | ((shifter_st.bas_md & 0xff) << 8); if (ATARIHW_PRESENT(EXTD_SHIFTER)) addr |= (shifter_st.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_st.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_st.bas_hi = (unsigned char)((addr & 0xff0000) >> 16); shifter_st.bas_md = (unsigned char)((addr & 0x00ff00) >> 8); if (ATARIHW_PRESENT(EXTD_SHIFTER)) shifter_st.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; red >>= 8; green >>= 8; blue >>= 8; 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_st.bas_hi = (unsigned char)((addr & 0xff0000) >> 16); shifter_st.bas_md = (unsigned char)((addr & 0x00ff00) >> 8); shifter_st.bas_lo = (unsigned char)(addr & 0x0000ff); } static int pan_display(struct fb_var_screeninfo *var, struct fb_info *info) { struct atafb_par *par = info->par; if (!fbhw->set_screen_base || (!ATARIHW_PRESENT(EXTD_SHIFTER) && var->xoffset)) return -EINVAL; var->xoffset = round_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_pan_display(struct fb_var_screeninfo *var, struct fb_info *info) { if (!fbhw->pan_display) return -EINVAL; return fbhw->pan_display(var, info); } /* * generic drawing routines; imageblit needs updating for image depth > 1 */ static void atafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect) { struct atafb_par *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 = 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 = info->par; int x2, y2; 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 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, ¤t_par, sizeof(struct atafb_par))) return -EFAULT; return 0; #endif #ifdef FBCMD_SET_CURRENTPAR case FBCMD_SET_CURRENTPAR: if (copy_from_user(¤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 = 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_DEFAULT_IOMEM_OPS_RDWR, .fb_check_var = atafb_check_var, .fb_set_par = atafb_set_par, .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, __FB_DEFAULT_IOMEM_OPS_MMAP, }; 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; } } static 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")) fb_invert_cmaps(); 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; } static int __init atafb_probe(struct platform_device *pdev) { int pad, detected_mode, error; unsigned int defmode = 0; unsigned long mem_req; char *option = NULL; if (fb_get_options("atafb", &option)) return -ENODEV; atafb_setup(option); dev_dbg(&pdev->dev, "%s: start\n", __func__); do { #ifdef ATAFB_EXT if (external_addr) { dev_dbg(&pdev->dev, "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)) { dev_dbg(&pdev->dev, "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)) { dev_dbg(&pdev->dev, "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)) { dev_dbg(&pdev->dev, "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; dev_warn(&pdev->dev, "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); } dev_info(&pdev->dev, "phys_screen_base %lx screen_len %d\n", 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 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); dev_info(&pdev->dev, "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)) dev_info(&pdev->dev, " 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; } static void atafb_shutdown(struct platform_device *pdev) { /* Unblank before kexec */ if (fbhw->blank) fbhw->blank(0); } static struct platform_driver atafb_driver = { .shutdown = atafb_shutdown, .driver = { .name = "atafb", }, }; static int __init atafb_init(void) { struct platform_device *pdev; if (!MACH_IS_ATARI) return -ENODEV; pdev = platform_device_register_simple("atafb", -1, NULL, 0); if (IS_ERR(pdev)) return PTR_ERR(pdev); return platform_driver_probe(&atafb_driver, atafb_probe); } device_initcall(atafb_init);
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2026-10-10