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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 00:20:36 +0200 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 00:20:36 +0200 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/video/hgafb.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/video/hgafb.c')
-rw-r--r-- | drivers/video/hgafb.c | 619 |
1 files changed, 619 insertions, 0 deletions
diff --git a/drivers/video/hgafb.c b/drivers/video/hgafb.c new file mode 100644 index 000000000000..b37cea7d1094 --- /dev/null +++ b/drivers/video/hgafb.c @@ -0,0 +1,619 @@ +/* + * linux/drivers/video/hgafb.c -- Hercules graphics adaptor frame buffer device + * + * Created 25 Nov 1999 by Ferenc Bakonyi (fero@drama.obuda.kando.hu) + * Based on skeletonfb.c by Geert Uytterhoeven and + * mdacon.c by Andrew Apted + * + * History: + * + * - Revision 0.1.8 (23 Oct 2002): Ported to new framebuffer api. + * + * - Revision 0.1.7 (23 Jan 2001): fix crash resulting from MDA only cards + * being detected as Hercules. (Paul G.) + * - Revision 0.1.6 (17 Aug 2000): new style structs + * documentation + * - Revision 0.1.5 (13 Mar 2000): spinlocks instead of saveflags();cli();etc + * minor fixes + * - Revision 0.1.4 (24 Jan 2000): fixed a bug in hga_card_detect() for + * HGA-only systems + * - Revision 0.1.3 (22 Jan 2000): modified for the new fb_info structure + * screen is cleared after rmmod + * virtual resolutions + * module parameter 'nologo={0|1}' + * the most important: boot logo :) + * - Revision 0.1.0 (6 Dec 1999): faster scrolling and minor fixes + * - First release (25 Nov 1999) + * + * 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/spinlock.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/tty.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/fb.h> +#include <linux/init.h> +#include <linux/ioport.h> +#include <asm/io.h> +#include <asm/vga.h> + +#if 0 +#define DPRINTK(args...) printk(KERN_DEBUG __FILE__": " ##args) +#else +#define DPRINTK(args...) +#endif + +#if 0 +#define CHKINFO(ret) if (info != &fb_info) { printk(KERN_DEBUG __FILE__": This should never happen, line:%d \n", __LINE__); return ret; } +#else +#define CHKINFO(ret) +#endif + +/* Description of the hardware layout */ + +static void __iomem *hga_vram; /* Base of video memory */ +static unsigned long hga_vram_len; /* Size of video memory */ + +#define HGA_ROWADDR(row) ((row%4)*8192 + (row>>2)*90) +#define HGA_TXT 0 +#define HGA_GFX 1 + +static inline u8 __iomem * rowaddr(struct fb_info *info, u_int row) +{ + return info->screen_base + HGA_ROWADDR(row); +} + +static int hga_mode = -1; /* 0 = txt, 1 = gfx mode */ + +static enum { TYPE_HERC, TYPE_HERCPLUS, TYPE_HERCCOLOR } hga_type; +static char *hga_type_name; + +#define HGA_INDEX_PORT 0x3b4 /* Register select port */ +#define HGA_VALUE_PORT 0x3b5 /* Register value port */ +#define HGA_MODE_PORT 0x3b8 /* Mode control port */ +#define HGA_STATUS_PORT 0x3ba /* Status and Config port */ +#define HGA_GFX_PORT 0x3bf /* Graphics control port */ + +/* HGA register values */ + +#define HGA_CURSOR_BLINKING 0x00 +#define HGA_CURSOR_OFF 0x20 +#define HGA_CURSOR_SLOWBLINK 0x60 + +#define HGA_MODE_GRAPHICS 0x02 +#define HGA_MODE_VIDEO_EN 0x08 +#define HGA_MODE_BLINK_EN 0x20 +#define HGA_MODE_GFX_PAGE1 0x80 + +#define HGA_STATUS_HSYNC 0x01 +#define HGA_STATUS_VSYNC 0x80 +#define HGA_STATUS_VIDEO 0x08 + +#define HGA_CONFIG_COL132 0x08 +#define HGA_GFX_MODE_EN 0x01 +#define HGA_GFX_PAGE_EN 0x02 + +/* Global locks */ + +static DEFINE_SPINLOCK(hga_reg_lock); + +/* Framebuffer driver structures */ + +static struct fb_var_screeninfo hga_default_var = { + .xres = 720, + .yres = 348, + .xres_virtual = 720, + .yres_virtual = 348, + .bits_per_pixel = 1, + .red = {0, 1, 0}, + .green = {0, 1, 0}, + .blue = {0, 1, 0}, + .transp = {0, 0, 0}, + .height = -1, + .width = -1, +}; + +static struct fb_fix_screeninfo hga_fix = { + .id = "HGA", + .type = FB_TYPE_PACKED_PIXELS, /* (not sure) */ + .visual = FB_VISUAL_MONO10, + .xpanstep = 8, + .ypanstep = 8, + .line_length = 90, + .accel = FB_ACCEL_NONE +}; + +static struct fb_info fb_info; + +/* Don't assume that tty1 will be the initial current console. */ +static int release_io_port = 0; +static int release_io_ports = 0; +static int nologo = 0; + +/* ------------------------------------------------------------------------- + * + * Low level hardware functions + * + * ------------------------------------------------------------------------- */ + +static void write_hga_b(unsigned int val, unsigned char reg) +{ + outb_p(reg, HGA_INDEX_PORT); + outb_p(val, HGA_VALUE_PORT); +} + +static void write_hga_w(unsigned int val, unsigned char reg) +{ + outb_p(reg, HGA_INDEX_PORT); outb_p(val >> 8, HGA_VALUE_PORT); + outb_p(reg+1, HGA_INDEX_PORT); outb_p(val & 0xff, HGA_VALUE_PORT); +} + +static int test_hga_b(unsigned char val, unsigned char reg) +{ + outb_p(reg, HGA_INDEX_PORT); + outb (val, HGA_VALUE_PORT); + udelay(20); val = (inb_p(HGA_VALUE_PORT) == val); + return val; +} + +static void hga_clear_screen(void) +{ + unsigned char fillchar = 0xbf; /* magic */ + unsigned long flags; + + spin_lock_irqsave(&hga_reg_lock, flags); + if (hga_mode == HGA_TXT) + fillchar = ' '; + else if (hga_mode == HGA_GFX) + fillchar = 0x00; + spin_unlock_irqrestore(&hga_reg_lock, flags); + if (fillchar != 0xbf) + memset_io(hga_vram, fillchar, hga_vram_len); +} + +static void hga_txt_mode(void) +{ + unsigned long flags; + + spin_lock_irqsave(&hga_reg_lock, flags); + outb_p(HGA_MODE_VIDEO_EN | HGA_MODE_BLINK_EN, HGA_MODE_PORT); + outb_p(0x00, HGA_GFX_PORT); + outb_p(0x00, HGA_STATUS_PORT); + + write_hga_b(0x61, 0x00); /* horizontal total */ + write_hga_b(0x50, 0x01); /* horizontal displayed */ + write_hga_b(0x52, 0x02); /* horizontal sync pos */ + write_hga_b(0x0f, 0x03); /* horizontal sync width */ + + write_hga_b(0x19, 0x04); /* vertical total */ + write_hga_b(0x06, 0x05); /* vertical total adjust */ + write_hga_b(0x19, 0x06); /* vertical displayed */ + write_hga_b(0x19, 0x07); /* vertical sync pos */ + + write_hga_b(0x02, 0x08); /* interlace mode */ + write_hga_b(0x0d, 0x09); /* maximum scanline */ + write_hga_b(0x0c, 0x0a); /* cursor start */ + write_hga_b(0x0d, 0x0b); /* cursor end */ + + write_hga_w(0x0000, 0x0c); /* start address */ + write_hga_w(0x0000, 0x0e); /* cursor location */ + + hga_mode = HGA_TXT; + spin_unlock_irqrestore(&hga_reg_lock, flags); +} + +static void hga_gfx_mode(void) +{ + unsigned long flags; + + spin_lock_irqsave(&hga_reg_lock, flags); + outb_p(0x00, HGA_STATUS_PORT); + outb_p(HGA_GFX_MODE_EN, HGA_GFX_PORT); + outb_p(HGA_MODE_VIDEO_EN | HGA_MODE_GRAPHICS, HGA_MODE_PORT); + + write_hga_b(0x35, 0x00); /* horizontal total */ + write_hga_b(0x2d, 0x01); /* horizontal displayed */ + write_hga_b(0x2e, 0x02); /* horizontal sync pos */ + write_hga_b(0x07, 0x03); /* horizontal sync width */ + + write_hga_b(0x5b, 0x04); /* vertical total */ + write_hga_b(0x02, 0x05); /* vertical total adjust */ + write_hga_b(0x57, 0x06); /* vertical displayed */ + write_hga_b(0x57, 0x07); /* vertical sync pos */ + + write_hga_b(0x02, 0x08); /* interlace mode */ + write_hga_b(0x03, 0x09); /* maximum scanline */ + write_hga_b(0x00, 0x0a); /* cursor start */ + write_hga_b(0x00, 0x0b); /* cursor end */ + + write_hga_w(0x0000, 0x0c); /* start address */ + write_hga_w(0x0000, 0x0e); /* cursor location */ + + hga_mode = HGA_GFX; + spin_unlock_irqrestore(&hga_reg_lock, flags); +} + +static void hga_show_logo(struct fb_info *info) +{ +/* + void __iomem *dest = hga_vram; + char *logo = linux_logo_bw; + int x, y; + + for (y = 134; y < 134 + 80 ; y++) * this needs some cleanup * + for (x = 0; x < 10 ; x++) + writeb(~*(logo++),(dest + HGA_ROWADDR(y) + x + 40)); +*/ +} + +static void hga_pan(unsigned int xoffset, unsigned int yoffset) +{ + unsigned int base; + unsigned long flags; + + base = (yoffset / 8) * 90 + xoffset; + spin_lock_irqsave(&hga_reg_lock, flags); + write_hga_w(base, 0x0c); /* start address */ + spin_unlock_irqrestore(&hga_reg_lock, flags); + DPRINTK("hga_pan: base:%d\n", base); +} + +static void hga_blank(int blank_mode) +{ + unsigned long flags; + + spin_lock_irqsave(&hga_reg_lock, flags); + if (blank_mode) { + outb_p(0x00, HGA_MODE_PORT); /* disable video */ + } else { + outb_p(HGA_MODE_VIDEO_EN | HGA_MODE_GRAPHICS, HGA_MODE_PORT); + } + spin_unlock_irqrestore(&hga_reg_lock, flags); +} + +static int __init hga_card_detect(void) +{ + int count=0; + void __iomem *p, *q; + unsigned short p_save, q_save; + + hga_vram_len = 0x08000; + + hga_vram = ioremap(0xb0000, hga_vram_len); + + if (request_region(0x3b0, 12, "hgafb")) + release_io_ports = 1; + if (request_region(0x3bf, 1, "hgafb")) + release_io_port = 1; + + /* do a memory check */ + + p = hga_vram; + q = hga_vram + 0x01000; + + p_save = readw(p); q_save = readw(q); + + writew(0xaa55, p); if (readw(p) == 0xaa55) count++; + writew(0x55aa, p); if (readw(p) == 0x55aa) count++; + writew(p_save, p); + + if (count != 2) { + return 0; + } + + /* Ok, there is definitely a card registering at the correct + * memory location, so now we do an I/O port test. + */ + + if (!test_hga_b(0x66, 0x0f)) { /* cursor low register */ + return 0; + } + if (!test_hga_b(0x99, 0x0f)) { /* cursor low register */ + return 0; + } + + /* See if the card is a Hercules, by checking whether the vsync + * bit of the status register is changing. This test lasts for + * approximately 1/10th of a second. + */ + + p_save = q_save = inb_p(HGA_STATUS_PORT) & HGA_STATUS_VSYNC; + + for (count=0; count < 50000 && p_save == q_save; count++) { + q_save = inb(HGA_STATUS_PORT) & HGA_STATUS_VSYNC; + udelay(2); + } + + if (p_save == q_save) + return 0; + + switch (inb_p(HGA_STATUS_PORT) & 0x70) { + case 0x10: + hga_type = TYPE_HERCPLUS; + hga_type_name = "HerculesPlus"; + break; + case 0x50: + hga_type = TYPE_HERCCOLOR; + hga_type_name = "HerculesColor"; + break; + default: + hga_type = TYPE_HERC; + hga_type_name = "Hercules"; + break; + } + return 1; +} + +/** + * hgafb_open - open the framebuffer device + * @info:pointer to fb_info object containing info for current hga board + * @int:open by console system or userland. + */ + +static int hgafb_open(struct fb_info *info, int init) +{ + hga_gfx_mode(); + hga_clear_screen(); + if (!nologo) hga_show_logo(info); + return 0; +} + +/** + * hgafb_open - open the framebuffer device + * @info:pointer to fb_info object containing info for current hga board + * @int:open by console system or userland. + */ + +static int hgafb_release(struct fb_info *info, int init) +{ + hga_txt_mode(); + hga_clear_screen(); + return 0; +} + +/** + * hgafb_setcolreg - set color registers + * @regno:register index to set + * @red:red value, unused + * @green:green value, unused + * @blue:blue value, unused + * @transp:transparency value, unused + * @info:unused + * + * This callback function is used to set the color registers of a HGA + * board. Since we have only two fixed colors only @regno is checked. + * A zero is returned on success and 1 for failure. + */ + +static int hgafb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, + u_int transp, struct fb_info *info) +{ + if (regno > 1) + return 1; + return 0; +} + +/** + * hga_pan_display - pan or wrap the display + * @var:contains new xoffset, yoffset and vmode values + * @info:pointer to fb_info object containing info for current hga board + * + * This function looks only at xoffset, yoffset and the %FB_VMODE_YWRAP + * flag in @var. If input parameters are correct it calls hga_pan() to + * program the hardware. @info->var is updated to the new values. + * A zero is returned on success and %-EINVAL for failure. + */ + +static int hgafb_pan_display(struct fb_var_screeninfo *var, + struct fb_info *info) +{ + if (var->vmode & FB_VMODE_YWRAP) { + if (var->yoffset < 0 || + var->yoffset >= info->var.yres_virtual || + var->xoffset) + return -EINVAL; + } else { + if (var->xoffset + var->xres > info->var.xres_virtual + || var->yoffset + var->yres > info->var.yres_virtual + || var->yoffset % 8) + return -EINVAL; + } + + hga_pan(var->xoffset, var->yoffset); + return 0; +} + +/** + * hgafb_blank - (un)blank the screen + * @blank_mode:blanking method to use + * @info:unused + * + * Blank the screen if blank_mode != 0, else unblank. + * Implements VESA suspend and powerdown modes on hardware that supports + * disabling hsync/vsync: + * @blank_mode == 2 means suspend vsync, + * @blank_mode == 3 means suspend hsync, + * @blank_mode == 4 means powerdown. + */ + +static int hgafb_blank(int blank_mode, struct fb_info *info) +{ + hga_blank(blank_mode); + return 0; +} + +/* + * Accel functions + */ +#ifdef CONFIG_FB_HGA_ACCEL +static void hgafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect) +{ + u_int rows, y; + u8 __iomem *dest; + + y = rect->dy; + + for (rows = rect->height; rows--; y++) { + dest = rowaddr(info, y) + (rect->dx >> 3); + switch (rect->rop) { + case ROP_COPY: + //fb_memset(dest, rect->color, (rect->width >> 3)); + break; + case ROP_XOR: + fb_writeb(~(fb_readb(dest)), dest); + break; + } + } +} + +static void hgafb_copyarea(struct fb_info *info, const struct fb_copyarea *area) +{ + u_int rows, y1, y2; + u8 __iomem *src; + u8 __iomem *dest; + + if (area->dy <= area->sy) { + y1 = area->sy; + y2 = area->dy; + + for (rows = area->height; rows--; ) { + src = rowaddr(info, y1) + (area->sx >> 3); + dest = rowaddr(info, y2) + (area->dx >> 3); + //fb_memmove(dest, src, (area->width >> 3)); + y1++; + y2++; + } + } else { + y1 = area->sy + area->height - 1; + y2 = area->dy + area->height - 1; + + for (rows = area->height; rows--;) { + src = rowaddr(info, y1) + (area->sx >> 3); + dest = rowaddr(info, y2) + (area->dx >> 3); + //fb_memmove(dest, src, (area->width >> 3)); + y1--; + y2--; + } + } +} + +static void hgafb_imageblit(struct fb_info *info, const struct fb_image *image) +{ + u8 __iomem *dest; + u8 *cdat = (u8 *) image->data; + u_int rows, y = image->dy; + u8 d; + + for (rows = image->height; rows--; y++) { + d = *cdat++; + dest = rowaddr(info, y) + (image->dx >> 3); + fb_writeb(d, dest); + } +} +#else /* !CONFIG_FB_HGA_ACCEL */ +#define hgafb_fillrect cfb_fillrect +#define hgafb_copyarea cfb_copyarea +#define hgafb_imageblit cfb_imageblit +#endif /* CONFIG_FB_HGA_ACCEL */ + + +static struct fb_ops hgafb_ops = { + .owner = THIS_MODULE, + .fb_open = hgafb_open, + .fb_release = hgafb_release, + .fb_setcolreg = hgafb_setcolreg, + .fb_pan_display = hgafb_pan_display, + .fb_blank = hgafb_blank, + .fb_fillrect = hgafb_fillrect, + .fb_copyarea = hgafb_copyarea, + .fb_imageblit = hgafb_imageblit, +}; + +/* ------------------------------------------------------------------------- * + * + * Functions in fb_info + * + * ------------------------------------------------------------------------- */ + +/* ------------------------------------------------------------------------- */ + + /* + * Initialization + */ + +static int __init hgafb_init(void) +{ + if (fb_get_options("hgafb", NULL)) + return -ENODEV; + + if (! hga_card_detect()) { + printk(KERN_INFO "hgafb: HGA card not detected.\n"); + if (hga_vram) + iounmap(hga_vram); + return -EINVAL; + } + + printk(KERN_INFO "hgafb: %s with %ldK of memory detected.\n", + hga_type_name, hga_vram_len/1024); + + hga_fix.smem_start = (unsigned long)hga_vram; + hga_fix.smem_len = hga_vram_len; + + fb_info.flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN; + fb_info.var = hga_default_var; + fb_info.fix = hga_fix; + fb_info.monspecs.hfmin = 0; + fb_info.monspecs.hfmax = 0; + fb_info.monspecs.vfmin = 10000; + fb_info.monspecs.vfmax = 10000; + fb_info.monspecs.dpms = 0; + fb_info.fbops = &hgafb_ops; + fb_info.screen_base = hga_vram; + + if (register_framebuffer(&fb_info) < 0) { + iounmap(hga_vram); + return -EINVAL; + } + + printk(KERN_INFO "fb%d: %s frame buffer device\n", + fb_info.node, fb_info.fix.id); + return 0; +} + +#ifdef MODULE +static void __exit hgafb_exit(void) +{ + hga_txt_mode(); + hga_clear_screen(); + unregister_framebuffer(&fb_info); + iounmap(hga_vram); + if (release_io_ports) release_region(0x3b0, 12); + if (release_io_port) release_region(0x3bf, 1); +} +#endif + +/* ------------------------------------------------------------------------- + * + * Modularization + * + * ------------------------------------------------------------------------- */ + +MODULE_AUTHOR("Ferenc Bakonyi (fero@drama.obuda.kando.hu)"); +MODULE_DESCRIPTION("FBDev driver for Hercules Graphics Adaptor"); +MODULE_LICENSE("GPL"); + +module_param(nologo, bool, 0); +MODULE_PARM_DESC(nologo, "Disables startup logo if != 0 (default=0)"); +module_init(hgafb_init); + +#ifdef MODULE +module_exit(hgafb_exit); +#endif |