diff options
author | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2014-02-13 14:31:38 +0100 |
---|---|---|
committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2014-04-17 07:10:19 +0200 |
commit | f7018c21350204c4cf628462f229d44d03545254 (patch) | |
tree | 408787177164cf51cc06f7aabdb04fcff8d2b6aa /drivers/video/vga16fb.c | |
parent | video: bf54x-lq043fb: fix build error (diff) | |
download | linux-f7018c21350204c4cf628462f229d44d03545254.tar.xz linux-f7018c21350204c4cf628462f229d44d03545254.zip |
video: move fbdev to drivers/video/fbdev
The drivers/video directory is a mess. It contains generic video related
files, directories for backlight, console, linux logo, lots of fbdev
device drivers, fbdev framework files.
Make some order into the chaos by creating drivers/video/fbdev
directory, and move all fbdev related files there.
No functionality is changed, although I guess it is possible that some
subtle Makefile build order related issue could be created by this
patch.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Rob Clark <robdclark@gmail.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/video/vga16fb.c')
-rw-r--r-- | drivers/video/vga16fb.c | 1464 |
1 files changed, 0 insertions, 1464 deletions
diff --git a/drivers/video/vga16fb.c b/drivers/video/vga16fb.c deleted file mode 100644 index 283d335a759f..000000000000 --- a/drivers/video/vga16fb.c +++ /dev/null @@ -1,1464 +0,0 @@ -/* - * linux/drivers/video/vga16.c -- VGA 16-color framebuffer driver - * - * Copyright 1999 Ben Pfaff <pfaffben@debian.org> and Petr Vandrovec <VANDROVE@vc.cvut.cz> - * Based on VGA info at http://www.goodnet.com/~tinara/FreeVGA/home.htm - * Based on VESA framebuffer (c) 1998 Gerd Knorr <kraxel@goldbach.in-berlin.de> - * - * This file is subject to the terms and conditions of the GNU General - * Public License. See the file COPYING in the main directory of this - * archive for more details. - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/string.h> -#include <linux/mm.h> -#include <linux/delay.h> -#include <linux/fb.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/platform_device.h> -#include <linux/screen_info.h> - -#include <asm/io.h> -#include <video/vga.h> - -#define VGA_FB_PHYS 0xA0000 -#define VGA_FB_PHYS_LEN 65536 - -#define MODE_SKIP4 1 -#define MODE_8BPP 2 -#define MODE_CFB 4 -#define MODE_TEXT 8 - -/* --------------------------------------------------------------------- */ - -/* - * card parameters - */ - -struct vga16fb_par { - /* structure holding original VGA register settings when the - screen is blanked */ - struct { - unsigned char SeqCtrlIndex; /* Sequencer Index reg. */ - unsigned char CrtCtrlIndex; /* CRT-Contr. Index reg. */ - unsigned char CrtMiscIO; /* Miscellaneous register */ - unsigned char HorizontalTotal; /* CRT-Controller:00h */ - unsigned char HorizDisplayEnd; /* CRT-Controller:01h */ - unsigned char StartHorizRetrace;/* CRT-Controller:04h */ - unsigned char EndHorizRetrace; /* CRT-Controller:05h */ - unsigned char Overflow; /* CRT-Controller:07h */ - unsigned char StartVertRetrace; /* CRT-Controller:10h */ - unsigned char EndVertRetrace; /* CRT-Controller:11h */ - unsigned char ModeControl; /* CRT-Controller:17h */ - unsigned char ClockingMode; /* Seq-Controller:01h */ - } vga_state; - struct vgastate state; - unsigned int ref_count; - int palette_blanked, vesa_blanked, mode, isVGA; - u8 misc, pel_msk, vss, clkdiv; - u8 crtc[VGA_CRT_C]; -}; - -/* --------------------------------------------------------------------- */ - -static struct fb_var_screeninfo vga16fb_defined = { - .xres = 640, - .yres = 480, - .xres_virtual = 640, - .yres_virtual = 480, - .bits_per_pixel = 4, - .activate = FB_ACTIVATE_TEST, - .height = -1, - .width = -1, - .pixclock = 39721, - .left_margin = 48, - .right_margin = 16, - .upper_margin = 33, - .lower_margin = 10, - .hsync_len = 96, - .vsync_len = 2, - .vmode = FB_VMODE_NONINTERLACED, -}; - -/* name should not depend on EGA/VGA */ -static struct fb_fix_screeninfo vga16fb_fix = { - .id = "VGA16 VGA", - .smem_start = VGA_FB_PHYS, - .smem_len = VGA_FB_PHYS_LEN, - .type = FB_TYPE_VGA_PLANES, - .type_aux = FB_AUX_VGA_PLANES_VGA4, - .visual = FB_VISUAL_PSEUDOCOLOR, - .xpanstep = 8, - .ypanstep = 1, - .line_length = 640 / 8, - .accel = FB_ACCEL_NONE -}; - -/* The VGA's weird architecture often requires that we read a byte and - write a byte to the same location. It doesn't matter *what* byte - we write, however. This is because all the action goes on behind - the scenes in the VGA's 32-bit latch register, and reading and writing - video memory just invokes latch behavior. - - To avoid race conditions (is this necessary?), reading and writing - the memory byte should be done with a single instruction. One - suitable instruction is the x86 bitwise OR. The following - read-modify-write routine should optimize to one such bitwise - OR. */ -static inline void rmw(volatile char __iomem *p) -{ - readb(p); - writeb(1, p); -} - -/* Set the Graphics Mode Register, and return its previous value. - Bits 0-1 are write mode, bit 3 is read mode. */ -static inline int setmode(int mode) -{ - int oldmode; - - oldmode = vga_io_rgfx(VGA_GFX_MODE); - vga_io_w(VGA_GFX_D, mode); - return oldmode; -} - -/* Select the Bit Mask Register and return its value. */ -static inline int selectmask(void) -{ - return vga_io_rgfx(VGA_GFX_BIT_MASK); -} - -/* Set the value of the Bit Mask Register. It must already have been - selected with selectmask(). */ -static inline void setmask(int mask) -{ - vga_io_w(VGA_GFX_D, mask); -} - -/* Set the Data Rotate Register and return its old value. - Bits 0-2 are rotate count, bits 3-4 are logical operation - (0=NOP, 1=AND, 2=OR, 3=XOR). */ -static inline int setop(int op) -{ - int oldop; - - oldop = vga_io_rgfx(VGA_GFX_DATA_ROTATE); - vga_io_w(VGA_GFX_D, op); - return oldop; -} - -/* Set the Enable Set/Reset Register and return its old value. - The code here always uses value 0xf for this register. */ -static inline int setsr(int sr) -{ - int oldsr; - - oldsr = vga_io_rgfx(VGA_GFX_SR_ENABLE); - vga_io_w(VGA_GFX_D, sr); - return oldsr; -} - -/* Set the Set/Reset Register and return its old value. */ -static inline int setcolor(int color) -{ - int oldcolor; - - oldcolor = vga_io_rgfx(VGA_GFX_SR_VALUE); - vga_io_w(VGA_GFX_D, color); - return oldcolor; -} - -/* Return the value in the Graphics Address Register. */ -static inline int getindex(void) -{ - return vga_io_r(VGA_GFX_I); -} - -/* Set the value in the Graphics Address Register. */ -static inline void setindex(int index) -{ - vga_io_w(VGA_GFX_I, index); -} - -static void vga16fb_pan_var(struct fb_info *info, - struct fb_var_screeninfo *var) -{ - struct vga16fb_par *par = info->par; - u32 xoffset, pos; - - xoffset = var->xoffset; - if (info->var.bits_per_pixel == 8) { - pos = (info->var.xres_virtual * var->yoffset + xoffset) >> 2; - } else if (par->mode & MODE_TEXT) { - int fh = 16; // FIXME !!! font height. Fugde for now. - pos = (info->var.xres_virtual * (var->yoffset / fh) + xoffset) >> 3; - } else { - if (info->var.nonstd) - xoffset--; - pos = (info->var.xres_virtual * var->yoffset + xoffset) >> 3; - } - vga_io_wcrt(VGA_CRTC_START_HI, pos >> 8); - vga_io_wcrt(VGA_CRTC_START_LO, pos & 0xFF); - /* if we support CFB4, then we must! support xoffset with pixel - * granularity if someone supports xoffset in bit resolution */ - vga_io_r(VGA_IS1_RC); /* reset flip-flop */ - vga_io_w(VGA_ATT_IW, VGA_ATC_PEL); - if (info->var.bits_per_pixel == 8) - vga_io_w(VGA_ATT_IW, (xoffset & 3) << 1); - else - vga_io_w(VGA_ATT_IW, xoffset & 7); - vga_io_r(VGA_IS1_RC); - vga_io_w(VGA_ATT_IW, 0x20); -} - -static void vga16fb_update_fix(struct fb_info *info) -{ - if (info->var.bits_per_pixel == 4) { - if (info->var.nonstd) { - info->fix.type = FB_TYPE_PACKED_PIXELS; - info->fix.line_length = info->var.xres_virtual / 2; - } else { - info->fix.type = FB_TYPE_VGA_PLANES; - info->fix.type_aux = FB_AUX_VGA_PLANES_VGA4; - info->fix.line_length = info->var.xres_virtual / 8; - } - } else if (info->var.bits_per_pixel == 0) { - info->fix.type = FB_TYPE_TEXT; - info->fix.type_aux = FB_AUX_TEXT_CGA; - info->fix.line_length = info->var.xres_virtual / 4; - } else { /* 8bpp */ - if (info->var.nonstd) { - info->fix.type = FB_TYPE_VGA_PLANES; - info->fix.type_aux = FB_AUX_VGA_PLANES_CFB8; - info->fix.line_length = info->var.xres_virtual / 4; - } else { - info->fix.type = FB_TYPE_PACKED_PIXELS; - info->fix.line_length = info->var.xres_virtual; - } - } -} - -static void vga16fb_clock_chip(struct vga16fb_par *par, - unsigned int pixclock, - const struct fb_info *info, - int mul, int div) -{ - static const struct { - u32 pixclock; - u8 misc; - u8 seq_clock_mode; - } *ptr, *best, vgaclocks[] = { - { 79442 /* 12.587 */, 0x00, 0x08}, - { 70616 /* 14.161 */, 0x04, 0x08}, - { 39721 /* 25.175 */, 0x00, 0x00}, - { 35308 /* 28.322 */, 0x04, 0x00}, - { 0 /* bad */, 0x00, 0x00}}; - int err; - - pixclock = (pixclock * mul) / div; - best = vgaclocks; - err = pixclock - best->pixclock; - if (err < 0) err = -err; - for (ptr = vgaclocks + 1; ptr->pixclock; ptr++) { - int tmp; - - tmp = pixclock - ptr->pixclock; - if (tmp < 0) tmp = -tmp; - if (tmp < err) { - err = tmp; - best = ptr; - } - } - par->misc |= best->misc; - par->clkdiv = best->seq_clock_mode; - pixclock = (best->pixclock * div) / mul; -} - -#define FAIL(X) return -EINVAL - -static int vga16fb_open(struct fb_info *info, int user) -{ - struct vga16fb_par *par = info->par; - - if (!par->ref_count) { - memset(&par->state, 0, sizeof(struct vgastate)); - par->state.flags = VGA_SAVE_FONTS | VGA_SAVE_MODE | - VGA_SAVE_CMAP; - save_vga(&par->state); - } - par->ref_count++; - - return 0; -} - -static int vga16fb_release(struct fb_info *info, int user) -{ - struct vga16fb_par *par = info->par; - - if (!par->ref_count) - return -EINVAL; - - if (par->ref_count == 1) - restore_vga(&par->state); - par->ref_count--; - - return 0; -} - -static int vga16fb_check_var(struct fb_var_screeninfo *var, - struct fb_info *info) -{ - struct vga16fb_par *par = info->par; - u32 xres, right, hslen, left, xtotal; - u32 yres, lower, vslen, upper, ytotal; - u32 vxres, xoffset, vyres, yoffset; - u32 pos; - u8 r7, rMode; - int shift; - int mode; - u32 maxmem; - - par->pel_msk = 0xFF; - - if (var->bits_per_pixel == 4) { - if (var->nonstd) { - if (!par->isVGA) - return -EINVAL; - shift = 3; - mode = MODE_SKIP4 | MODE_CFB; - maxmem = 16384; - par->pel_msk = 0x0F; - } else { - shift = 3; - mode = 0; - maxmem = 65536; - } - } else if (var->bits_per_pixel == 8) { - if (!par->isVGA) - return -EINVAL; /* no support on EGA */ - shift = 2; - if (var->nonstd) { - mode = MODE_8BPP | MODE_CFB; - maxmem = 65536; - } else { - mode = MODE_SKIP4 | MODE_8BPP | MODE_CFB; - maxmem = 16384; - } - } else - return -EINVAL; - - xres = (var->xres + 7) & ~7; - vxres = (var->xres_virtual + 0xF) & ~0xF; - xoffset = (var->xoffset + 7) & ~7; - left = (var->left_margin + 7) & ~7; - right = (var->right_margin + 7) & ~7; - hslen = (var->hsync_len + 7) & ~7; - - if (vxres < xres) - vxres = xres; - if (xres + xoffset > vxres) - xoffset = vxres - xres; - - var->xres = xres; - var->right_margin = right; - var->hsync_len = hslen; - var->left_margin = left; - var->xres_virtual = vxres; - var->xoffset = xoffset; - - xres >>= shift; - right >>= shift; - hslen >>= shift; - left >>= shift; - vxres >>= shift; - xtotal = xres + right + hslen + left; - if (xtotal >= 256) - FAIL("xtotal too big"); - if (hslen > 32) - FAIL("hslen too big"); - if (right + hslen + left > 64) - FAIL("hblank too big"); - par->crtc[VGA_CRTC_H_TOTAL] = xtotal - 5; - par->crtc[VGA_CRTC_H_BLANK_START] = xres - 1; - par->crtc[VGA_CRTC_H_DISP] = xres - 1; - pos = xres + right; - par->crtc[VGA_CRTC_H_SYNC_START] = pos; - pos += hslen; - par->crtc[VGA_CRTC_H_SYNC_END] = pos & 0x1F; - pos += left - 2; /* blank_end + 2 <= total + 5 */ - par->crtc[VGA_CRTC_H_BLANK_END] = (pos & 0x1F) | 0x80; - if (pos & 0x20) - par->crtc[VGA_CRTC_H_SYNC_END] |= 0x80; - - yres = var->yres; - lower = var->lower_margin; - vslen = var->vsync_len; - upper = var->upper_margin; - vyres = var->yres_virtual; - yoffset = var->yoffset; - - if (yres > vyres) - vyres = yres; - if (vxres * vyres > maxmem) { - vyres = maxmem / vxres; - if (vyres < yres) - return -ENOMEM; - } - if (yoffset + yres > vyres) - yoffset = vyres - yres; - var->yres = yres; - var->lower_margin = lower; - var->vsync_len = vslen; - var->upper_margin = upper; - var->yres_virtual = vyres; - var->yoffset = yoffset; - - if (var->vmode & FB_VMODE_DOUBLE) { - yres <<= 1; - lower <<= 1; - vslen <<= 1; - upper <<= 1; - } - ytotal = yres + lower + vslen + upper; - if (ytotal > 1024) { - ytotal >>= 1; - yres >>= 1; - lower >>= 1; - vslen >>= 1; - upper >>= 1; - rMode = 0x04; - } else - rMode = 0x00; - if (ytotal > 1024) - FAIL("ytotal too big"); - if (vslen > 16) - FAIL("vslen too big"); - par->crtc[VGA_CRTC_V_TOTAL] = ytotal - 2; - r7 = 0x10; /* disable linecompare */ - if (ytotal & 0x100) r7 |= 0x01; - if (ytotal & 0x200) r7 |= 0x20; - par->crtc[VGA_CRTC_PRESET_ROW] = 0; - par->crtc[VGA_CRTC_MAX_SCAN] = 0x40; /* 1 scanline, no linecmp */ - if (var->vmode & FB_VMODE_DOUBLE) - par->crtc[VGA_CRTC_MAX_SCAN] |= 0x80; - par->crtc[VGA_CRTC_CURSOR_START] = 0x20; - par->crtc[VGA_CRTC_CURSOR_END] = 0x00; - if ((mode & (MODE_CFB | MODE_8BPP)) == MODE_CFB) - xoffset--; - pos = yoffset * vxres + (xoffset >> shift); - par->crtc[VGA_CRTC_START_HI] = pos >> 8; - par->crtc[VGA_CRTC_START_LO] = pos & 0xFF; - par->crtc[VGA_CRTC_CURSOR_HI] = 0x00; - par->crtc[VGA_CRTC_CURSOR_LO] = 0x00; - pos = yres - 1; - par->crtc[VGA_CRTC_V_DISP_END] = pos & 0xFF; - par->crtc[VGA_CRTC_V_BLANK_START] = pos & 0xFF; - if (pos & 0x100) - r7 |= 0x0A; /* 0x02 -> DISP_END, 0x08 -> BLANK_START */ - if (pos & 0x200) { - r7 |= 0x40; /* 0x40 -> DISP_END */ - par->crtc[VGA_CRTC_MAX_SCAN] |= 0x20; /* BLANK_START */ - } - pos += lower; - par->crtc[VGA_CRTC_V_SYNC_START] = pos & 0xFF; - if (pos & 0x100) - r7 |= 0x04; - if (pos & 0x200) - r7 |= 0x80; - pos += vslen; - par->crtc[VGA_CRTC_V_SYNC_END] = (pos & 0x0F) & ~0x10; /* disabled IRQ */ - pos += upper - 1; /* blank_end + 1 <= ytotal + 2 */ - par->crtc[VGA_CRTC_V_BLANK_END] = pos & 0xFF; /* 0x7F for original VGA, - but some SVGA chips requires all 8 bits to set */ - if (vxres >= 512) - FAIL("vxres too long"); - par->crtc[VGA_CRTC_OFFSET] = vxres >> 1; - if (mode & MODE_SKIP4) - par->crtc[VGA_CRTC_UNDERLINE] = 0x5F; /* 256, cfb8 */ - else - par->crtc[VGA_CRTC_UNDERLINE] = 0x1F; /* 16, vgap */ - par->crtc[VGA_CRTC_MODE] = rMode | ((mode & MODE_TEXT) ? 0xA3 : 0xE3); - par->crtc[VGA_CRTC_LINE_COMPARE] = 0xFF; - par->crtc[VGA_CRTC_OVERFLOW] = r7; - - par->vss = 0x00; /* 3DA */ - - par->misc = 0xE3; /* enable CPU, ports 0x3Dx, positive sync */ - if (var->sync & FB_SYNC_HOR_HIGH_ACT) - par->misc &= ~0x40; - if (var->sync & FB_SYNC_VERT_HIGH_ACT) - par->misc &= ~0x80; - - par->mode = mode; - - if (mode & MODE_8BPP) - /* pixel clock == vga clock / 2 */ - vga16fb_clock_chip(par, var->pixclock, info, 1, 2); - else - /* pixel clock == vga clock */ - vga16fb_clock_chip(par, var->pixclock, info, 1, 1); - - var->red.offset = var->green.offset = var->blue.offset = - var->transp.offset = 0; - var->red.length = var->green.length = var->blue.length = - (par->isVGA) ? 6 : 2; - var->transp.length = 0; - var->activate = FB_ACTIVATE_NOW; - var->height = -1; - var->width = -1; - var->accel_flags = 0; - return 0; -} -#undef FAIL - -static int vga16fb_set_par(struct fb_info *info) -{ - struct vga16fb_par *par = info->par; - u8 gdc[VGA_GFX_C]; - u8 seq[VGA_SEQ_C]; - u8 atc[VGA_ATT_C]; - int fh, i; - - seq[VGA_SEQ_CLOCK_MODE] = 0x01 | par->clkdiv; - if (par->mode & MODE_TEXT) - seq[VGA_SEQ_PLANE_WRITE] = 0x03; - else - seq[VGA_SEQ_PLANE_WRITE] = 0x0F; - seq[VGA_SEQ_CHARACTER_MAP] = 0x00; - if (par->mode & MODE_TEXT) - seq[VGA_SEQ_MEMORY_MODE] = 0x03; - else if (par->mode & MODE_SKIP4) - seq[VGA_SEQ_MEMORY_MODE] = 0x0E; - else - seq[VGA_SEQ_MEMORY_MODE] = 0x06; - - gdc[VGA_GFX_SR_VALUE] = 0x00; - gdc[VGA_GFX_SR_ENABLE] = 0x00; - gdc[VGA_GFX_COMPARE_VALUE] = 0x00; - gdc[VGA_GFX_DATA_ROTATE] = 0x00; - gdc[VGA_GFX_PLANE_READ] = 0; - if (par->mode & MODE_TEXT) { - gdc[VGA_GFX_MODE] = 0x10; - gdc[VGA_GFX_MISC] = 0x06; - } else { - if (par->mode & MODE_CFB) - gdc[VGA_GFX_MODE] = 0x40; - else - gdc[VGA_GFX_MODE] = 0x00; - gdc[VGA_GFX_MISC] = 0x05; - } - gdc[VGA_GFX_COMPARE_MASK] = 0x0F; - gdc[VGA_GFX_BIT_MASK] = 0xFF; - - for (i = 0x00; i < 0x10; i++) - atc[i] = i; - if (par->mode & MODE_TEXT) - atc[VGA_ATC_MODE] = 0x04; - else if (par->mode & MODE_8BPP) - atc[VGA_ATC_MODE] = 0x41; - else - atc[VGA_ATC_MODE] = 0x81; - atc[VGA_ATC_OVERSCAN] = 0x00; /* 0 for EGA, 0xFF for VGA */ - atc[VGA_ATC_PLANE_ENABLE] = 0x0F; - if (par->mode & MODE_8BPP) - atc[VGA_ATC_PEL] = (info->var.xoffset & 3) << 1; - else - atc[VGA_ATC_PEL] = info->var.xoffset & 7; - atc[VGA_ATC_COLOR_PAGE] = 0x00; - - if (par->mode & MODE_TEXT) { - fh = 16; // FIXME !!! Fudge font height. - par->crtc[VGA_CRTC_MAX_SCAN] = (par->crtc[VGA_CRTC_MAX_SCAN] - & ~0x1F) | (fh - 1); - } - - vga_io_w(VGA_MIS_W, vga_io_r(VGA_MIS_R) | 0x01); - - /* Enable graphics register modification */ - if (!par->isVGA) { - vga_io_w(EGA_GFX_E0, 0x00); - vga_io_w(EGA_GFX_E1, 0x01); - } - - /* update misc output register */ - vga_io_w(VGA_MIS_W, par->misc); - - /* synchronous reset on */ - vga_io_wseq(0x00, 0x01); - - if (par->isVGA) - vga_io_w(VGA_PEL_MSK, par->pel_msk); - - /* write sequencer registers */ - vga_io_wseq(VGA_SEQ_CLOCK_MODE, seq[VGA_SEQ_CLOCK_MODE] | 0x20); - for (i = 2; i < VGA_SEQ_C; i++) { - vga_io_wseq(i, seq[i]); - } - - /* synchronous reset off */ - vga_io_wseq(0x00, 0x03); - - /* deprotect CRT registers 0-7 */ - vga_io_wcrt(VGA_CRTC_V_SYNC_END, par->crtc[VGA_CRTC_V_SYNC_END]); - - /* write CRT registers */ - for (i = 0; i < VGA_CRTC_REGS; i++) { - vga_io_wcrt(i, par->crtc[i]); - } - - /* write graphics controller registers */ - for (i = 0; i < VGA_GFX_C; i++) { - vga_io_wgfx(i, gdc[i]); - } - - /* write attribute controller registers */ - for (i = 0; i < VGA_ATT_C; i++) { - vga_io_r(VGA_IS1_RC); /* reset flip-flop */ - vga_io_wattr(i, atc[i]); - } - - /* Wait for screen to stabilize. */ - mdelay(50); - - vga_io_wseq(VGA_SEQ_CLOCK_MODE, seq[VGA_SEQ_CLOCK_MODE]); - - vga_io_r(VGA_IS1_RC); - vga_io_w(VGA_ATT_IW, 0x20); - - vga16fb_update_fix(info); - return 0; -} - -static void ega16_setpalette(int regno, unsigned red, unsigned green, unsigned blue) -{ - static const unsigned char map[] = { 000, 001, 010, 011 }; - int val; - - if (regno >= 16) - return; - val = map[red>>14] | ((map[green>>14]) << 1) | ((map[blue>>14]) << 2); - vga_io_r(VGA_IS1_RC); /* ! 0x3BA */ - vga_io_wattr(regno, val); - vga_io_r(VGA_IS1_RC); /* some clones need it */ - vga_io_w(VGA_ATT_IW, 0x20); /* unblank screen */ -} - -static void vga16_setpalette(int regno, unsigned red, unsigned green, unsigned blue) -{ - outb(regno, VGA_PEL_IW); - outb(red >> 10, VGA_PEL_D); - outb(green >> 10, VGA_PEL_D); - outb(blue >> 10, VGA_PEL_D); -} - -static int vga16fb_setcolreg(unsigned regno, unsigned red, unsigned green, - unsigned blue, unsigned transp, - struct fb_info *info) -{ - struct vga16fb_par *par = info->par; - int gray; - - /* - * Set a single color register. The values supplied are - * already rounded down to the hardware's capabilities - * (according to the entries in the `var' structure). Return - * != 0 for invalid regno. - */ - - if (regno >= 256) - return 1; - - gray = info->var.grayscale; - - if (gray) { - /* gray = 0.30*R + 0.59*G + 0.11*B */ - red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8; - } - if (par->isVGA) - vga16_setpalette(regno,red,green,blue); - else - ega16_setpalette(regno,red,green,blue); - return 0; -} - -static int vga16fb_pan_display(struct fb_var_screeninfo *var, - struct fb_info *info) -{ - vga16fb_pan_var(info, var); - return 0; -} - -/* The following VESA blanking code is taken from vgacon.c. The VGA - blanking code was originally by Huang shi chao, and modified by - Christoph Rimek (chrimek@toppoint.de) and todd j. derr - (tjd@barefoot.org) for Linux. */ - -static void vga_vesa_blank(struct vga16fb_par *par, int mode) -{ - unsigned char SeqCtrlIndex = vga_io_r(VGA_SEQ_I); - unsigned char CrtCtrlIndex = vga_io_r(VGA_CRT_IC); - - /* save original values of VGA controller registers */ - if(!par->vesa_blanked) { - par->vga_state.CrtMiscIO = vga_io_r(VGA_MIS_R); - //sti(); - - par->vga_state.HorizontalTotal = vga_io_rcrt(0x00); /* HorizontalTotal */ - par->vga_state.HorizDisplayEnd = vga_io_rcrt(0x01); /* HorizDisplayEnd */ - par->vga_state.StartHorizRetrace = vga_io_rcrt(0x04); /* StartHorizRetrace */ - par->vga_state.EndHorizRetrace = vga_io_rcrt(0x05); /* EndHorizRetrace */ - par->vga_state.Overflow = vga_io_rcrt(0x07); /* Overflow */ - par->vga_state.StartVertRetrace = vga_io_rcrt(0x10); /* StartVertRetrace */ - par->vga_state.EndVertRetrace = vga_io_rcrt(0x11); /* EndVertRetrace */ - par->vga_state.ModeControl = vga_io_rcrt(0x17); /* ModeControl */ - par->vga_state.ClockingMode = vga_io_rseq(0x01); /* ClockingMode */ - } - - /* assure that video is enabled */ - /* "0x20" is VIDEO_ENABLE_bit in register 01 of sequencer */ - vga_io_wseq(0x01, par->vga_state.ClockingMode | 0x20); - - /* test for vertical retrace in process.... */ - if ((par->vga_state.CrtMiscIO & 0x80) == 0x80) - vga_io_w(VGA_MIS_W, par->vga_state.CrtMiscIO & 0xef); - - /* - * Set <End of vertical retrace> to minimum (0) and - * <Start of vertical Retrace> to maximum (incl. overflow) - * Result: turn off vertical sync (VSync) pulse. - */ - if (mode & FB_BLANK_VSYNC_SUSPEND) { - vga_io_wcrt(VGA_CRTC_V_SYNC_START, 0xff); - vga_io_wcrt(VGA_CRTC_V_SYNC_END, 0x40); - /* bits 9,10 of vert. retrace */ - vga_io_wcrt(VGA_CRTC_OVERFLOW, par->vga_state.Overflow | 0x84); - } - - if (mode & FB_BLANK_HSYNC_SUSPEND) { - /* - * Set <End of horizontal retrace> to minimum (0) and - * <Start of horizontal Retrace> to maximum - * Result: turn off horizontal sync (HSync) pulse. - */ - vga_io_wcrt(VGA_CRTC_H_SYNC_START, 0xff); - vga_io_wcrt(VGA_CRTC_H_SYNC_END, 0x00); - } - - /* restore both index registers */ - outb_p(SeqCtrlIndex, VGA_SEQ_I); - outb_p(CrtCtrlIndex, VGA_CRT_IC); -} - -static void vga_vesa_unblank(struct vga16fb_par *par) -{ - unsigned char SeqCtrlIndex = vga_io_r(VGA_SEQ_I); - unsigned char CrtCtrlIndex = vga_io_r(VGA_CRT_IC); - - /* restore original values of VGA controller registers */ - vga_io_w(VGA_MIS_W, par->vga_state.CrtMiscIO); - - /* HorizontalTotal */ - vga_io_wcrt(0x00, par->vga_state.HorizontalTotal); - /* HorizDisplayEnd */ - vga_io_wcrt(0x01, par->vga_state.HorizDisplayEnd); - /* StartHorizRetrace */ - vga_io_wcrt(0x04, par->vga_state.StartHorizRetrace); - /* EndHorizRetrace */ - vga_io_wcrt(0x05, par->vga_state.EndHorizRetrace); - /* Overflow */ - vga_io_wcrt(0x07, par->vga_state.Overflow); - /* StartVertRetrace */ - vga_io_wcrt(0x10, par->vga_state.StartVertRetrace); - /* EndVertRetrace */ - vga_io_wcrt(0x11, par->vga_state.EndVertRetrace); - /* ModeControl */ - vga_io_wcrt(0x17, par->vga_state.ModeControl); - /* ClockingMode */ - vga_io_wseq(0x01, par->vga_state.ClockingMode); - - /* restore index/control registers */ - vga_io_w(VGA_SEQ_I, SeqCtrlIndex); - vga_io_w(VGA_CRT_IC, CrtCtrlIndex); -} - -static void vga_pal_blank(void) -{ - int i; - - for (i=0; i<16; i++) { - outb_p(i, VGA_PEL_IW); - outb_p(0, VGA_PEL_D); - outb_p(0, VGA_PEL_D); - outb_p(0, VGA_PEL_D); - } -} - -/* 0 unblank, 1 blank, 2 no vsync, 3 no hsync, 4 off */ -static int vga16fb_blank(int blank, struct fb_info *info) -{ - struct vga16fb_par *par = info->par; - - switch (blank) { - case FB_BLANK_UNBLANK: /* Unblank */ - if (par->vesa_blanked) { - vga_vesa_unblank(par); - par->vesa_blanked = 0; - } - if (par->palette_blanked) { - par->palette_blanked = 0; - } - break; - case FB_BLANK_NORMAL: /* blank */ - vga_pal_blank(); - par->palette_blanked = 1; - break; - default: /* VESA blanking */ - vga_vesa_blank(par, blank); - par->vesa_blanked = 1; - break; - } - return 0; -} - -static void vga_8planes_fillrect(struct fb_info *info, const struct fb_fillrect *rect) -{ - u32 dx = rect->dx, width = rect->width; - char oldindex = getindex(); - char oldmode = setmode(0x40); - char oldmask = selectmask(); - int line_ofs, height; - char oldop, oldsr; - char __iomem *where; - - dx /= 4; - where = info->screen_base + dx + rect->dy * info->fix.line_length; - - if (rect->rop == ROP_COPY) { - oldop = setop(0); - oldsr = setsr(0); - - width /= 4; - line_ofs = info->fix.line_length - width; - setmask(0xff); - - height = rect->height; - - while (height--) { - int x; - - /* we can do memset... */ - for (x = width; x > 0; --x) { - writeb(rect->color, where); - where++; - } - where += line_ofs; - } - } else { - char oldcolor = setcolor(0xf); - int y; - - oldop = setop(0x18); - oldsr = setsr(0xf); - setmask(0x0F); - for (y = 0; y < rect->height; y++) { - rmw(where); - rmw(where+1); - where += info->fix.line_length; - } - setcolor(oldcolor); - } - setmask(oldmask); - setsr(oldsr); - setop(oldop); - setmode(oldmode); - setindex(oldindex); -} - -static void vga16fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect) -{ - int x, x2, y2, vxres, vyres, width, height, line_ofs; - char __iomem *dst; - - vxres = info->var.xres_virtual; - vyres = info->var.yres_virtual; - - if (!rect->width || !rect->height || rect->dx > vxres || rect->dy > vyres) - return; - - /* 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 < vxres ? x2 : vxres; - y2 = y2 < vyres ? y2 : vyres; - width = x2 - rect->dx; - - switch (info->fix.type) { - case FB_TYPE_VGA_PLANES: - if (info->fix.type_aux == FB_AUX_VGA_PLANES_VGA4) { - - height = y2 - rect->dy; - width = rect->width/8; - - line_ofs = info->fix.line_length - width; - dst = info->screen_base + (rect->dx/8) + rect->dy * info->fix.line_length; - - switch (rect->rop) { - case ROP_COPY: - setmode(0); - setop(0); - setsr(0xf); - setcolor(rect->color); - selectmask(); - - setmask(0xff); - - while (height--) { - for (x = 0; x < width; x++) { - writeb(0, dst); - dst++; - } - dst += line_ofs; - } - break; - case ROP_XOR: - setmode(0); - setop(0x18); - setsr(0xf); - setcolor(0xf); - selectmask(); - - setmask(0xff); - while (height--) { - for (x = 0; x < width; x++) { - rmw(dst); - dst++; - } - dst += line_ofs; - } - break; - } - } else - vga_8planes_fillrect(info, rect); - break; - case FB_TYPE_PACKED_PIXELS: - default: - cfb_fillrect(info, rect); - break; - } -} - -static void vga_8planes_copyarea(struct fb_info *info, const struct fb_copyarea *area) -{ - char oldindex = getindex(); - char oldmode = setmode(0x41); - char oldop = setop(0); - char oldsr = setsr(0xf); - int height, line_ofs, x; - u32 sx, dx, width; - char __iomem *dest; - char __iomem *src; - - height = area->height; - - sx = area->sx / 4; - dx = area->dx / 4; - width = area->width / 4; - - if (area->dy < area->sy || (area->dy == area->sy && dx < sx)) { - line_ofs = info->fix.line_length - width; - dest = info->screen_base + dx + area->dy * info->fix.line_length; - src = info->screen_base + sx + area->sy * info->fix.line_length; - while (height--) { - for (x = 0; x < width; x++) { - readb(src); - writeb(0, dest); - src++; - dest++; - } - src += line_ofs; - dest += line_ofs; - } - } else { - line_ofs = info->fix.line_length - width; - dest = info->screen_base + dx + width + - (area->dy + height - 1) * info->fix.line_length; - src = info->screen_base + sx + width + - (area->sy + height - 1) * info->fix.line_length; - while (height--) { - for (x = 0; x < width; x++) { - --src; - --dest; - readb(src); - writeb(0, dest); - } - src -= line_ofs; - dest -= line_ofs; - } - } - - setsr(oldsr); - setop(oldop); - setmode(oldmode); - setindex(oldindex); -} - -static void vga16fb_copyarea(struct fb_info *info, const struct fb_copyarea *area) -{ - u32 dx = area->dx, dy = area->dy, sx = area->sx, sy = area->sy; - int x, x2, y2, old_dx, old_dy, vxres, vyres; - int height, width, line_ofs; - char __iomem *dst = NULL; - char __iomem *src = NULL; - - vxres = info->var.xres_virtual; - vyres = info->var.yres_virtual; - - if (area->dx > vxres || area->sx > vxres || area->dy > vyres || - area->sy > vyres) - return; - - /* clip the destination */ - old_dx = area->dx; - old_dy = area->dy; - - /* - * We could use hardware clipping but on many cards you get around - * hardware clipping by writing to framebuffer directly. - */ - 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 < vxres ? x2 : vxres; - y2 = y2 < vyres ? y2 : vyres; - width = x2 - dx; - height = y2 - dy; - - if (sx + dx < old_dx || sy + dy < old_dy) - return; - - /* update sx1,sy1 */ - sx += (dx - old_dx); - sy += (dy - old_dy); - - /* the source must be completely inside the virtual screen */ - if (sx + width > vxres || sy + height > vyres) - return; - - switch (info->fix.type) { - case FB_TYPE_VGA_PLANES: - if (info->fix.type_aux == FB_AUX_VGA_PLANES_VGA4) { - width = width/8; - height = height; - line_ofs = info->fix.line_length - width; - - setmode(1); - setop(0); - setsr(0xf); - - if (dy < sy || (dy == sy && dx < sx)) { - dst = info->screen_base + (dx/8) + dy * info->fix.line_length; - src = info->screen_base + (sx/8) + sy * info->fix.line_length; - while (height--) { - for (x = 0; x < width; x++) { - readb(src); - writeb(0, dst); - dst++; - src++; - } - src += line_ofs; - dst += line_ofs; - } - } else { - dst = info->screen_base + (dx/8) + width + - (dy + height - 1) * info->fix.line_length; - src = info->screen_base + (sx/8) + width + - (sy + height - 1) * info->fix.line_length; - while (height--) { - for (x = 0; x < width; x++) { - dst--; - src--; - readb(src); - writeb(0, dst); - } - src -= line_ofs; - dst -= line_ofs; - } - } - } else - vga_8planes_copyarea(info, area); - break; - case FB_TYPE_PACKED_PIXELS: - default: - cfb_copyarea(info, area); - break; - } -} - -#define TRANS_MASK_LOW {0x0,0x8,0x4,0xC,0x2,0xA,0x6,0xE,0x1,0x9,0x5,0xD,0x3,0xB,0x7,0xF} -#define TRANS_MASK_HIGH {0x000, 0x800, 0x400, 0xC00, 0x200, 0xA00, 0x600, 0xE00, \ - 0x100, 0x900, 0x500, 0xD00, 0x300, 0xB00, 0x700, 0xF00} - -#if defined(__LITTLE_ENDIAN) -static const u16 transl_l[] = TRANS_MASK_LOW; -static const u16 transl_h[] = TRANS_MASK_HIGH; -#elif defined(__BIG_ENDIAN) -static const u16 transl_l[] = TRANS_MASK_HIGH; -static const u16 transl_h[] = TRANS_MASK_LOW; -#else -#error "Only __BIG_ENDIAN and __LITTLE_ENDIAN are supported in vga-planes" -#endif - -static void vga_8planes_imageblit(struct fb_info *info, const struct fb_image *image) -{ - char oldindex = getindex(); - char oldmode = setmode(0x40); - char oldop = setop(0); - char oldsr = setsr(0); - char oldmask = selectmask(); - const char *cdat = image->data; - u32 dx = image->dx; - char __iomem *where; - int y; - - dx /= 4; - where = info->screen_base + dx + image->dy * info->fix.line_length; - - setmask(0xff); - writeb(image->bg_color, where); - readb(where); - selectmask(); - setmask(image->fg_color ^ image->bg_color); - setmode(0x42); - setop(0x18); - for (y = 0; y < image->height; y++, where += info->fix.line_length) - writew(transl_h[cdat[y]&0xF] | transl_l[cdat[y] >> 4], where); - setmask(oldmask); - setsr(oldsr); - setop(oldop); - setmode(oldmode); - setindex(oldindex); -} - -static void vga_imageblit_expand(struct fb_info *info, const struct fb_image *image) -{ - char __iomem *where = info->screen_base + (image->dx/8) + - image->dy * info->fix.line_length; - struct vga16fb_par *par = info->par; - char *cdat = (char *) image->data; - char __iomem *dst; - int x, y; - - switch (info->fix.type) { - case FB_TYPE_VGA_PLANES: - if (info->fix.type_aux == FB_AUX_VGA_PLANES_VGA4) { - if (par->isVGA) { - setmode(2); - setop(0); - setsr(0xf); - setcolor(image->fg_color); - selectmask(); - - setmask(0xff); - writeb(image->bg_color, where); - rmb(); - readb(where); /* fill latches */ - setmode(3); - wmb(); - for (y = 0; y < image->height; y++) { - dst = where; - for (x = image->width/8; x--;) - writeb(*cdat++, dst++); - where += info->fix.line_length; - } - wmb(); - } else { - setmode(0); - setop(0); - setsr(0xf); - setcolor(image->bg_color); - selectmask(); - - setmask(0xff); - for (y = 0; y < image->height; y++) { - dst = where; - for (x=image->width/8; x--;){ - rmw(dst); - setcolor(image->fg_color); - selectmask(); - if (*cdat) { - setmask(*cdat++); - rmw(dst++); - } - } - where += info->fix.line_length; - } - } - } else - vga_8planes_imageblit(info, image); - break; - case FB_TYPE_PACKED_PIXELS: - default: - cfb_imageblit(info, image); - break; - } -} - -static void vga_imageblit_color(struct fb_info *info, const struct fb_image *image) -{ - /* - * Draw logo - */ - struct vga16fb_par *par = info->par; - char __iomem *where = - info->screen_base + image->dy * info->fix.line_length + - image->dx/8; - const char *cdat = image->data; - char __iomem *dst; - int x, y; - - switch (info->fix.type) { - case FB_TYPE_VGA_PLANES: - if (info->fix.type_aux == FB_AUX_VGA_PLANES_VGA4 && - par->isVGA) { - setsr(0xf); - setop(0); - setmode(0); - - for (y = 0; y < image->height; y++) { - for (x = 0; x < image->width; x++) { - dst = where + x/8; - - setcolor(*cdat); - selectmask(); - setmask(1 << (7 - (x % 8))); - fb_readb(dst); - fb_writeb(0, dst); - - cdat++; - } - where += info->fix.line_length; - } - } - break; - case FB_TYPE_PACKED_PIXELS: - cfb_imageblit(info, image); - break; - default: - break; - } -} - -static void vga16fb_imageblit(struct fb_info *info, const struct fb_image *image) -{ - if (image->depth == 1) - vga_imageblit_expand(info, image); - else - vga_imageblit_color(info, image); -} - -static void vga16fb_destroy(struct fb_info *info) -{ - iounmap(info->screen_base); - fb_dealloc_cmap(&info->cmap); - /* XXX unshare VGA regions */ - framebuffer_release(info); -} - -static struct fb_ops vga16fb_ops = { - .owner = THIS_MODULE, - .fb_open = vga16fb_open, - .fb_release = vga16fb_release, - .fb_destroy = vga16fb_destroy, - .fb_check_var = vga16fb_check_var, - .fb_set_par = vga16fb_set_par, - .fb_setcolreg = vga16fb_setcolreg, - .fb_pan_display = vga16fb_pan_display, - .fb_blank = vga16fb_blank, - .fb_fillrect = vga16fb_fillrect, - .fb_copyarea = vga16fb_copyarea, - .fb_imageblit = vga16fb_imageblit, -}; - -#ifndef MODULE -static int __init vga16fb_setup(char *options) -{ - char *this_opt; - - if (!options || !*options) - return 0; - - while ((this_opt = strsep(&options, ",")) != NULL) { - if (!*this_opt) continue; - } - return 0; -} -#endif - -static int vga16fb_probe(struct platform_device *dev) -{ - struct fb_info *info; - struct vga16fb_par *par; - int i; - int ret = 0; - - printk(KERN_DEBUG "vga16fb: initializing\n"); - info = framebuffer_alloc(sizeof(struct vga16fb_par), &dev->dev); - - if (!info) { - ret = -ENOMEM; - goto err_fb_alloc; - } - info->apertures = alloc_apertures(1); - if (!info->apertures) { - ret = -ENOMEM; - goto err_ioremap; - } - - /* XXX share VGA_FB_PHYS and I/O region with vgacon and others */ - info->screen_base = (void __iomem *)VGA_MAP_MEM(VGA_FB_PHYS, 0); - - if (!info->screen_base) { - printk(KERN_ERR "vga16fb: unable to map device\n"); - ret = -ENOMEM; - goto err_ioremap; - } - - printk(KERN_INFO "vga16fb: mapped to 0x%p\n", info->screen_base); - par = info->par; - - par->isVGA = screen_info.orig_video_isVGA; - par->palette_blanked = 0; - par->vesa_blanked = 0; - - i = par->isVGA? 6 : 2; - - vga16fb_defined.red.length = i; - vga16fb_defined.green.length = i; - vga16fb_defined.blue.length = i; - - /* name should not depend on EGA/VGA */ - info->fbops = &vga16fb_ops; - info->var = vga16fb_defined; - info->fix = vga16fb_fix; - /* supports rectangles with widths of multiples of 8 */ - info->pixmap.blit_x = 1 << 7 | 1 << 15 | 1 << 23 | 1 << 31; - info->flags = FBINFO_FLAG_DEFAULT | FBINFO_MISC_FIRMWARE | - FBINFO_HWACCEL_YPAN; - - i = (info->var.bits_per_pixel == 8) ? 256 : 16; - ret = fb_alloc_cmap(&info->cmap, i, 0); - if (ret) { - printk(KERN_ERR "vga16fb: unable to allocate colormap\n"); - ret = -ENOMEM; - goto err_alloc_cmap; - } - - if (vga16fb_check_var(&info->var, info)) { - printk(KERN_ERR "vga16fb: unable to validate variable\n"); - ret = -EINVAL; - goto err_check_var; - } - - vga16fb_update_fix(info); - - info->apertures->ranges[0].base = VGA_FB_PHYS; - info->apertures->ranges[0].size = VGA_FB_PHYS_LEN; - - if (register_framebuffer(info) < 0) { - printk(KERN_ERR "vga16fb: unable to register framebuffer\n"); - ret = -EINVAL; - goto err_check_var; - } - - fb_info(info, "%s frame buffer device\n", info->fix.id); - platform_set_drvdata(dev, info); - - return 0; - - err_check_var: - fb_dealloc_cmap(&info->cmap); - err_alloc_cmap: - iounmap(info->screen_base); - err_ioremap: - framebuffer_release(info); - err_fb_alloc: - return ret; -} - -static int vga16fb_remove(struct platform_device *dev) -{ - struct fb_info *info = platform_get_drvdata(dev); - - if (info) - unregister_framebuffer(info); - - return 0; -} - -static struct platform_driver vga16fb_driver = { - .probe = vga16fb_probe, - .remove = vga16fb_remove, - .driver = { - .name = "vga16fb", - }, -}; - -static struct platform_device *vga16fb_device; - -static int __init vga16fb_init(void) -{ - int ret; -#ifndef MODULE - char *option = NULL; - - if (fb_get_options("vga16fb", &option)) - return -ENODEV; - - vga16fb_setup(option); -#endif - ret = platform_driver_register(&vga16fb_driver); - - if (!ret) { - vga16fb_device = platform_device_alloc("vga16fb", 0); - - if (vga16fb_device) - ret = platform_device_add(vga16fb_device); - else - ret = -ENOMEM; - - if (ret) { - platform_device_put(vga16fb_device); - platform_driver_unregister(&vga16fb_driver); - } - } - - return ret; -} - -static void __exit vga16fb_exit(void) -{ - platform_device_unregister(vga16fb_device); - platform_driver_unregister(&vga16fb_driver); -} - -MODULE_DESCRIPTION("Legacy VGA framebuffer device driver"); -MODULE_LICENSE("GPL"); -module_init(vga16fb_init); -module_exit(vga16fb_exit); - - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * --------------------------------------------------------------------------- - * Local variables: - * c-basic-offset: 8 - * End: - */ - |