diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/video/pmag-aa-fb.c |
Linux-2.6.12-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/pmag-aa-fb.c')
-rw-r--r-- | drivers/video/pmag-aa-fb.c | 514 |
1 files changed, 514 insertions, 0 deletions
diff --git a/drivers/video/pmag-aa-fb.c b/drivers/video/pmag-aa-fb.c new file mode 100644 index 000000000000..3e00ad7f2e31 --- /dev/null +++ b/drivers/video/pmag-aa-fb.c @@ -0,0 +1,514 @@ +/* + * linux/drivers/video/pmag-aa-fb.c + * Copyright 2002 Karsten Merker <merker@debian.org> + * + * PMAG-AA TurboChannel framebuffer card support ... derived from + * pmag-ba-fb.c, which is Copyright (C) 1999, 2000, 2001 by + * Michael Engel <engel@unix-ag.org>, Karsten Merker <merker@debian.org> + * and Harald Koerfgen <hkoerfg@web.de>, which itself is derived from + * "HP300 Topcat framebuffer support (derived from macfb of all things) + * Phil Blundell <philb@gnu.org> 1998" + * + * 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. + * + * 2002-09-28 Karsten Merker <merker@linuxtag.org> + * Version 0.01: First try to get a PMAG-AA running. + * + * 2003-02-24 Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de> + * Version 0.02: Major code cleanup. + * + * 2003-09-21 Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de> + * Hardware cursor support. + */ +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/timer.h> +#include <linux/mm.h> +#include <linux/tty.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/fb.h> +#include <linux/console.h> + +#include <asm/bootinfo.h> +#include <asm/dec/machtype.h> +#include <asm/dec/tc.h> + +#include <video/fbcon.h> +#include <video/fbcon-cfb8.h> + +#include "bt455.h" +#include "bt431.h" + +/* Version information */ +#define DRIVER_VERSION "0.02" +#define DRIVER_AUTHOR "Karsten Merker <merker@linuxtag.org>" +#define DRIVER_DESCRIPTION "PMAG-AA Framebuffer Driver" + +/* Prototypes */ +static int aafb_set_var(struct fb_var_screeninfo *var, int con, + struct fb_info *info); + +/* + * Bt455 RAM DAC register base offset (rel. to TC slot base address). + */ +#define PMAG_AA_BT455_OFFSET 0x100000 + +/* + * Bt431 cursor generator offset (rel. to TC slot base address). + */ +#define PMAG_AA_BT431_OFFSET 0x180000 + +/* + * Begin of PMAG-AA framebuffer memory relative to TC slot address, + * resolution is 1280x1024x1 (8 bits deep, but only LSB is used). + */ +#define PMAG_AA_ONBOARD_FBMEM_OFFSET 0x200000 + +struct aafb_cursor { + struct timer_list timer; + int enable; + int on; + int vbl_cnt; + int blink_rate; + u16 x, y, width, height; +}; + +#define CURSOR_TIMER_FREQ (HZ / 50) +#define CURSOR_BLINK_RATE (20) +#define CURSOR_DRAW_DELAY (2) + +struct aafb_info { + struct fb_info info; + struct display disp; + struct aafb_cursor cursor; + struct bt455_regs *bt455; + struct bt431_regs *bt431; + unsigned long fb_start; + unsigned long fb_size; + unsigned long fb_line_length; +}; + +/* + * Max 3 TURBOchannel slots -> max 3 PMAG-AA. + */ +static struct aafb_info my_fb_info[3]; + +static struct aafb_par { +} current_par; + +static int currcon = -1; + +static void aafb_set_cursor(struct aafb_info *info, int on) +{ + struct aafb_cursor *c = &info->cursor; + + if (on) { + bt431_position_cursor(info->bt431, c->x, c->y); + bt431_enable_cursor(info->bt431); + } else + bt431_erase_cursor(info->bt431); +} + +static void aafbcon_cursor(struct display *disp, int mode, int x, int y) +{ + struct aafb_info *info = (struct aafb_info *)disp->fb_info; + struct aafb_cursor *c = &info->cursor; + + x *= fontwidth(disp); + y *= fontheight(disp); + + if (c->x == x && c->y == y && (mode == CM_ERASE) == !c->enable) + return; + + c->enable = 0; + if (c->on) + aafb_set_cursor(info, 0); + c->x = x - disp->var.xoffset; + c->y = y - disp->var.yoffset; + + switch (mode) { + case CM_ERASE: + c->on = 0; + break; + case CM_DRAW: + case CM_MOVE: + if (c->on) + aafb_set_cursor(info, c->on); + else + c->vbl_cnt = CURSOR_DRAW_DELAY; + c->enable = 1; + break; + } +} + +static int aafbcon_set_font(struct display *disp, int width, int height) +{ + struct aafb_info *info = (struct aafb_info *)disp->fb_info; + struct aafb_cursor *c = &info->cursor; + u8 fgc = ~attr_bgcol_ec(disp, disp->conp); + + if (width > 64 || height > 64 || width < 0 || height < 0) + return -EINVAL; + + c->height = height; + c->width = width; + + bt431_set_font(info->bt431, fgc, width, height); + + return 1; +} + +static void aafb_cursor_timer_handler(unsigned long data) +{ + struct aafb_info *info = (struct aafb_info *)data; + struct aafb_cursor *c = &info->cursor; + + if (!c->enable) + goto out; + + if (c->vbl_cnt && --c->vbl_cnt == 0) { + c->on ^= 1; + aafb_set_cursor(info, c->on); + c->vbl_cnt = c->blink_rate; + } + +out: + c->timer.expires = jiffies + CURSOR_TIMER_FREQ; + add_timer(&c->timer); +} + +static void __init aafb_cursor_init(struct aafb_info *info) +{ + struct aafb_cursor *c = &info->cursor; + + c->enable = 1; + c->on = 1; + c->x = c->y = 0; + c->width = c->height = 0; + c->vbl_cnt = CURSOR_DRAW_DELAY; + c->blink_rate = CURSOR_BLINK_RATE; + + init_timer(&c->timer); + c->timer.data = (unsigned long)info; + c->timer.function = aafb_cursor_timer_handler; + mod_timer(&c->timer, jiffies + CURSOR_TIMER_FREQ); +} + +static void __exit aafb_cursor_exit(struct aafb_info *info) +{ + struct aafb_cursor *c = &info->cursor; + + del_timer_sync(&c->timer); +} + +static struct display_switch aafb_switch8 = { + .setup = fbcon_cfb8_setup, + .bmove = fbcon_cfb8_bmove, + .clear = fbcon_cfb8_clear, + .putc = fbcon_cfb8_putc, + .putcs = fbcon_cfb8_putcs, + .revc = fbcon_cfb8_revc, + .cursor = aafbcon_cursor, + .set_font = aafbcon_set_font, + .clear_margins = fbcon_cfb8_clear_margins, + .fontwidthmask = FONTWIDTH(4)|FONTWIDTH(8)|FONTWIDTH(12)|FONTWIDTH(16) +}; + +static void aafb_get_par(struct aafb_par *par) +{ + *par = current_par; +} + +static int aafb_get_fix(struct fb_fix_screeninfo *fix, int con, + struct fb_info *info) +{ + struct aafb_info *ip = (struct aafb_info *)info; + + memset(fix, 0, sizeof(struct fb_fix_screeninfo)); + strcpy(fix->id, "PMAG-AA"); + fix->smem_start = ip->fb_start; + fix->smem_len = ip->fb_size; + fix->type = FB_TYPE_PACKED_PIXELS; + fix->ypanstep = 1; + fix->ywrapstep = 1; + fix->visual = FB_VISUAL_MONO10; + fix->line_length = 1280; + fix->accel = FB_ACCEL_NONE; + + return 0; +} + +static void aafb_set_disp(struct display *disp, int con, + struct aafb_info *info) +{ + struct fb_fix_screeninfo fix; + + disp->fb_info = &info->info; + aafb_set_var(&disp->var, con, &info->info); + if (disp->conp && disp->conp->vc_sw && disp->conp->vc_sw->con_cursor) + disp->conp->vc_sw->con_cursor(disp->conp, CM_ERASE); + disp->dispsw = &aafb_switch8; + disp->dispsw_data = 0; + + aafb_get_fix(&fix, con, &info->info); + disp->screen_base = (u8 *) fix.smem_start; + disp->visual = fix.visual; + disp->type = fix.type; + disp->type_aux = fix.type_aux; + disp->ypanstep = fix.ypanstep; + disp->ywrapstep = fix.ywrapstep; + disp->line_length = fix.line_length; + disp->next_line = 2048; + disp->can_soft_blank = 1; + disp->inverse = 0; + disp->scrollmode = SCROLL_YREDRAW; + + aafbcon_set_font(disp, fontwidth(disp), fontheight(disp)); +} + +static int aafb_get_cmap(struct fb_cmap *cmap, int kspc, int con, + struct fb_info *info) +{ + static u16 color[2] = {0x0000, 0x000f}; + static struct fb_cmap aafb_cmap = {0, 2, color, color, color, NULL}; + + fb_copy_cmap(&aafb_cmap, cmap, kspc ? 0 : 2); + return 0; +} + +static int aafb_set_cmap(struct fb_cmap *cmap, int kspc, int con, + struct fb_info *info) +{ + u16 color[2] = {0x0000, 0x000f}; + + if (cmap->start == 0 + && cmap->len == 2 + && memcmp(cmap->red, color, sizeof(color)) == 0 + && memcmp(cmap->green, color, sizeof(color)) == 0 + && memcmp(cmap->blue, color, sizeof(color)) == 0 + && cmap->transp == NULL) + return 0; + else + return -EINVAL; +} + +static int aafb_ioctl(struct inode *inode, struct file *file, u32 cmd, + unsigned long arg, int con, struct fb_info *info) +{ + /* TODO: Not yet implemented */ + return -ENOIOCTLCMD; +} + +static int aafb_switch(int con, struct fb_info *info) +{ + struct aafb_info *ip = (struct aafb_info *)info; + struct display *old = (currcon < 0) ? &ip->disp : (fb_display + currcon); + struct display *new = (con < 0) ? &ip->disp : (fb_display + con); + + if (old->conp && old->conp->vc_sw && old->conp->vc_sw->con_cursor) + old->conp->vc_sw->con_cursor(old->conp, CM_ERASE); + + /* Set the current console. */ + currcon = con; + aafb_set_disp(new, con, ip); + + return 0; +} + +static void aafb_encode_var(struct fb_var_screeninfo *var, + struct aafb_par *par) +{ + var->xres = 1280; + var->yres = 1024; + var->xres_virtual = 2048; + var->yres_virtual = 1024; + var->xoffset = 0; + var->yoffset = 0; + var->bits_per_pixel = 8; + var->grayscale = 1; + var->red.offset = 0; + var->red.length = 0; + var->red.msb_right = 0; + var->green.offset = 0; + var->green.length = 1; + var->green.msb_right = 0; + var->blue.offset = 0; + var->blue.length = 0; + var->blue.msb_right = 0; + var->transp.offset = 0; + var->transp.length = 0; + var->transp.msb_right = 0; + var->nonstd = 0; + var->activate &= ~FB_ACTIVATE_MASK & FB_ACTIVATE_NOW; + var->accel_flags = 0; + var->sync = FB_SYNC_ON_GREEN; + var->vmode &= ~FB_VMODE_MASK & FB_VMODE_NONINTERLACED; +} + +static int aafb_get_var(struct fb_var_screeninfo *var, int con, + struct fb_info *info) +{ + if (con < 0) { + struct aafb_par par; + + memset(var, 0, sizeof(struct fb_var_screeninfo)); + aafb_get_par(&par); + aafb_encode_var(var, &par); + } else + *var = info->var; + + return 0; +} + +static int aafb_set_var(struct fb_var_screeninfo *var, int con, + struct fb_info *info) +{ + struct aafb_par par; + + aafb_get_par(&par); + aafb_encode_var(var, &par); + info->var = *var; + + return 0; +} + +static int aafb_update_var(int con, struct fb_info *info) +{ + struct aafb_info *ip = (struct aafb_info *)info; + struct display *disp = (con < 0) ? &ip->disp : (fb_display + con); + + if (con == currcon) + aafbcon_cursor(disp, CM_ERASE, ip->cursor.x, ip->cursor.y); + + return 0; +} + +/* 0 unblanks, any other blanks. */ + +static void aafb_blank(int blank, struct fb_info *info) +{ + struct aafb_info *ip = (struct aafb_info *)info; + u8 val = blank ? 0x00 : 0x0f; + + bt455_write_cmap_entry(ip->bt455, 1, val, val, val); + aafbcon_cursor(&ip->disp, CM_ERASE, ip->cursor.x, ip->cursor.y); +} + +static struct fb_ops aafb_ops = { + .owner = THIS_MODULE, + .fb_get_fix = aafb_get_fix, + .fb_get_var = aafb_get_var, + .fb_set_var = aafb_set_var, + .fb_get_cmap = aafb_get_cmap, + .fb_set_cmap = aafb_set_cmap, + .fb_ioctl = aafb_ioctl +}; + +static int __init init_one(int slot) +{ + unsigned long base_addr = get_tc_base_addr(slot); + struct aafb_info *ip = &my_fb_info[slot]; + + memset(ip, 0, sizeof(struct aafb_info)); + + /* + * Framebuffer display memory base address and friends. + */ + ip->bt455 = (struct bt455_regs *) (base_addr + PMAG_AA_BT455_OFFSET); + ip->bt431 = (struct bt431_regs *) (base_addr + PMAG_AA_BT431_OFFSET); + ip->fb_start = base_addr + PMAG_AA_ONBOARD_FBMEM_OFFSET; + ip->fb_size = 2048 * 1024; /* fb_fix_screeninfo.smem_length + seems to be physical */ + ip->fb_line_length = 2048; + + /* + * Let there be consoles.. + */ + strcpy(ip->info.modename, "PMAG-AA"); + ip->info.node = -1; + ip->info.flags = FBINFO_FLAG_DEFAULT; + ip->info.fbops = &aafb_ops; + ip->info.disp = &ip->disp; + ip->info.changevar = NULL; + ip->info.switch_con = &aafb_switch; + ip->info.updatevar = &aafb_update_var; + ip->info.blank = &aafb_blank; + + aafb_set_disp(&ip->disp, currcon, ip); + + /* + * Configure the RAM DACs. + */ + bt455_erase_cursor(ip->bt455); + + /* Init colormap. */ + bt455_write_cmap_entry(ip->bt455, 0, 0x00, 0x00, 0x00); + bt455_write_cmap_entry(ip->bt455, 1, 0x0f, 0x0f, 0x0f); + + /* Init hardware cursor. */ + bt431_init_cursor(ip->bt431); + aafb_cursor_init(ip); + + /* Clear the screen. */ + memset ((void *)ip->fb_start, 0, ip->fb_size); + + if (register_framebuffer(&ip->info) < 0) + return -EINVAL; + + printk(KERN_INFO "fb%d: %s frame buffer in TC slot %d\n", + GET_FB_IDX(ip->info.node), ip->info.modename, slot); + + return 0; +} + +static int __exit exit_one(int slot) +{ + struct aafb_info *ip = &my_fb_info[slot]; + + if (unregister_framebuffer(&ip->info) < 0) + return -EINVAL; + + return 0; +} + +/* + * Initialise the framebuffer. + */ +int __init pmagaafb_init(void) +{ + int sid; + int found = 0; + + while ((sid = search_tc_card("PMAG-AA")) >= 0) { + found = 1; + claim_tc_card(sid); + init_one(sid); + } + + return found ? 0 : -ENXIO; +} + +static void __exit pmagaafb_exit(void) +{ + int sid; + + while ((sid = search_tc_card("PMAG-AA")) >= 0) { + exit_one(sid); + release_tc_card(sid); + } +} + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESCRIPTION); +MODULE_LICENSE("GPL"); +#ifdef MODULE +module_init(pmagaafb_init); +module_exit(pmagaafb_exit); +#endif |