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path: root/drivers/video/pmag-aa-fb.c
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Diffstat (limited to 'drivers/video/pmag-aa-fb.c')
-rw-r--r--drivers/video/pmag-aa-fb.c514
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