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/*
* linux/drivers/video/fm2fb.c -- BSC FrameMaster II/Rainbow II frame buffer
* device
*
* Copyright (C) 1998 Steffen A. Mork (mork@ls7.cs.uni-dortmund.de)
* Copyright (C) 1999 Geert Uytterhoeven
*
* Written for 2.0.x by Steffen A. Mork
* Ported to 2.1.x by Geert Uytterhoeven
*
* 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/mm.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/zorro.h>
#include <asm/io.h>
#include <video/fbcon.h>
#include <video/fbcon-cfb32.h>
/*
* Some technical notes:
*
* The BSC FrameMaster II (or Rainbow II) is a simple very dumb
* frame buffer which allows to display 24 bit true color images.
* Each pixel is 32 bit width so it's very easy to maintain the
* frame buffer. One long word has the following layout:
* AARRGGBB which means: AA the alpha channel byte, RR the red
* channel, GG the green channel and BB the blue channel.
*
* The FrameMaster II supports the following video modes.
* - PAL/NTSC
* - interlaced/non interlaced
* - composite sync/sync/sync over green
*
* The resolution is to the following both ones:
* - 768x576 (PAL)
* - 768x480 (NTSC)
*
* This means that pixel access per line is fixed due to the
* fixed line width. In case of maximal resolution the frame
* buffer needs an amount of memory of 1.769.472 bytes which
* is near to 2 MByte (the allocated address space of Zorro2).
* The memory is channel interleaved. That means every channel
* owns four VRAMs. Unfortunatly most FrameMasters II are
* not assembled with memory for the alpha channel. In this
* case it could be possible to add the frame buffer into the
* normal memory pool.
*
* At relative address 0x1ffff8 of the frame buffers base address
* there exists a control register with the number of
* four control bits. They have the following meaning:
* bit value meaning
*
* 0 1 0=interlaced/1=non interlaced
* 1 2 0=video out disabled/1=video out enabled
* 2 4 0=normal mode as jumpered via JP8/1=complement mode
* 3 8 0=read onboard ROM/1 normal operation (required)
*
* As mentioned above there are several jumper. I think there
* is not very much information about the FrameMaster II in
* the world so I add these information for completeness.
*
* JP1 interlace selection (1-2 non interlaced/2-3 interlaced)
* JP2 wait state creation (leave as is!)
* JP3 wait state creation (leave as is!)
* JP4 modulate composite sync on green output (1-2 composite
* sync on green channel/2-3 normal composite sync)
* JP5 create test signal, shorting this jumper will create
* a white screen
* JP6 sync creation (1-2 composite sync/2-3 H-sync output)
* JP8 video mode (1-2 PAL/2-3 NTSC)
*
* With the following jumpering table you can connect the
* FrameMaster II to a normal TV via SCART connector:
* JP1: 2-3
* JP4: 2-3
* JP6: 2-3
* JP8: 1-2 (means PAL for Europe)
*
* NOTE:
* There is no other possibility to change the video timings
* except the interlaced/non interlaced, sync control and the
* video mode PAL (50 Hz)/NTSC (60 Hz). Inside this
* FrameMaster II driver are assumed values to avoid anomalies
* to a future X server. Except the pixel clock is really
* constant at 30 MHz.
*
* 9 pin female video connector:
*
* 1 analog red 0.7 Vss
* 2 analog green 0.7 Vss
* 3 analog blue 0.7 Vss
* 4 H-sync TTL
* 5 V-sync TTL
* 6 ground
* 7 ground
* 8 ground
* 9 ground
*
* Some performance notes:
* The FrameMaster II was not designed to display a console
* this driver would do! It was designed to display still true
* color images. Imagine: When scroll up a text line there
* must copied ca. 1.7 MBytes to another place inside this
* frame buffer. This means 1.7 MByte read and 1.7 MByte write
* over the slow 16 bit wide Zorro2 bus! A scroll of one
* line needs 1 second so do not expect to much from this
* driver - he is at the limit!
*
*/
/*
* definitions
*/
#define FRAMEMASTER_SIZE 0x200000
#define FRAMEMASTER_REG 0x1ffff8
#define FRAMEMASTER_NOLACE 1
#define FRAMEMASTER_ENABLE 2
#define FRAMEMASTER_COMPL 4
#define FRAMEMASTER_ROM 8
struct FrameMaster_fb_par
{
int xres;
int yres;
int bpp;
int pixclock;
};
static unsigned long fm2fb_mem_phys;
static void *fm2fb_mem;
static unsigned long fm2fb_reg_phys;
static volatile unsigned char *fm2fb_reg;
static int currcon = 0;
static struct display disp;
static struct fb_info fb_info;
static struct { u_char red, green, blue, pad; } palette[16];
#ifdef FBCON_HAS_CFB32
static u32 fbcon_cfb32_cmap[16];
#endif
static struct fb_fix_screeninfo fb_fix;
static struct fb_var_screeninfo fb_var;
static int fm2fb_mode __initdata = -1;
#define FM2FB_MODE_PAL 0
#define FM2FB_MODE_NTSC 1
static struct fb_var_screeninfo fb_var_modes[] __initdata = {
{
/* 768 x 576, 32 bpp (PAL) */
768, 576, 768, 576, 0, 0, 32, 0,
{ 16, 8, 0 }, { 8, 8, 0 }, { 0, 8, 0 }, { 24, 8, 0 },
0, FB_ACTIVATE_NOW, -1, -1, FB_ACCEL_NONE,
33333, 10, 102, 10, 5, 80, 34, FB_SYNC_COMP_HIGH_ACT, 0
}, {
/* 768 x 480, 32 bpp (NTSC - not supported yet */
768, 480, 768, 480, 0, 0, 32, 0,
{ 16, 8, 0 }, { 8, 8, 0 }, { 0, 8, 0 }, { 24, 8, 0 },
0, FB_ACTIVATE_NOW, -1, -1, FB_ACCEL_NONE,
33333, 10, 102, 10, 5, 80, 34, FB_SYNC_COMP_HIGH_ACT, 0
}
};
/*
* Interface used by the world
*/
static int fm2fb_get_fix(struct fb_fix_screeninfo *fix, int con,
struct fb_info *info);
static int fm2fb_get_var(struct fb_var_screeninfo *var, int con,
struct fb_info *info);
static int fm2fb_set_var(struct fb_var_screeninfo *var, int con,
struct fb_info *info);
static int fm2fb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info);
static int fm2fb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info);
/*
* Interface to the low level console driver
*/
int fm2fb_init(void);
static int fm2fbcon_switch(int con, struct fb_info *info);
static int fm2fbcon_updatevar(int con, struct fb_info *info);
static void fm2fbcon_blank(int blank, struct fb_info *info);
/*
* Internal routines
*/
static int fm2fb_getcolreg(u_int regno, u_int *red, u_int *green, u_int *blue,
u_int *transp, struct fb_info *info);
static int fm2fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *info);
static void do_install_cmap(int con, struct fb_info *info);
static struct fb_ops fm2fb_ops = {
owner: THIS_MODULE,
fb_get_fix: fm2fb_get_fix,
fb_get_var: fm2fb_get_var,
fb_set_var: fm2fb_set_var,
fb_get_cmap: fm2fb_get_cmap,
fb_set_cmap: fm2fb_set_cmap,
};
/*
* Get the Fixed Part of the Display
*/
static int fm2fb_get_fix(struct fb_fix_screeninfo *fix, int con,
struct fb_info *info)
{
memcpy(fix, &fb_fix, sizeof(fb_fix));
return 0;
}
/*
* Get the User Defined Part of the Display
*/
static int fm2fb_get_var(struct fb_var_screeninfo *var, int con,
struct fb_info *info)
{
memcpy(var, &fb_var, sizeof(fb_var));
return 0;
}
/*
* Set the User Defined Part of the Display
*/
static int fm2fb_set_var(struct fb_var_screeninfo *var, int con,
struct fb_info *info)
{
struct display *display;
int oldbpp = -1, err;
if (con >= 0)
display = &fb_display[con];
else
display = &disp; /* used during initialization */
if (var->xres > fb_var.xres || var->yres > fb_var.yres ||
var->xres_virtual > fb_var.xres_virtual ||
var->yres_virtual > fb_var.yres_virtual ||
var->bits_per_pixel > fb_var.bits_per_pixel ||
var->nonstd ||
(var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED)
return -EINVAL;
memcpy(var, &fb_var, sizeof(fb_var));
if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
oldbpp = display->var.bits_per_pixel;
display->var = *var;
}
if (oldbpp != var->bits_per_pixel) {
if ((err = fb_alloc_cmap(&display->cmap, 0, 0)))
return err;
do_install_cmap(con, info);
}
return 0;
}
/*
* Get the Colormap
*/
static int fm2fb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info)
{
if (con == currcon) /* current console? */
return fb_get_cmap(cmap, kspc, fm2fb_getcolreg, info);
else if (fb_display[con].cmap.len) /* non default colormap? */
fb_copy_cmap(&fb_display[con].cmap, cmap, kspc ? 0 : 2);
else
fb_copy_cmap(fb_default_cmap(256), cmap, kspc ? 0 : 2);
return 0;
}
/*
* Set the Colormap
*/
static int fm2fb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info)
{
int err;
if (!fb_display[con].cmap.len) { /* no colormap allocated? */
if ((err = fb_alloc_cmap(&fb_display[con].cmap, 256, 0)))
return err;
}
if (con == currcon) { /* current console? */
err = fb_set_cmap(cmap, kspc, fm2fb_setcolreg, info);
return err;
} else
fb_copy_cmap(cmap, &fb_display[con].cmap, kspc ? 0 : 1);
return 0;
}
/*
* Initialisation
*/
int __init fm2fb_init(void)
{
int is_fm;
struct zorro_dev *z = NULL;
unsigned long *ptr;
int x, y;
while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
if (z->id == ZORRO_PROD_BSC_FRAMEMASTER_II)
is_fm = 1;
else if (z->id == ZORRO_PROD_HELFRICH_RAINBOW_II)
is_fm = 0;
else
continue;
if (!request_mem_region(z->resource.start, FRAMEMASTER_SIZE, "fm2fb"))
continue;
/* assigning memory to kernel space */
fm2fb_mem_phys = z->resource.start;
fm2fb_mem = ioremap(fm2fb_mem_phys, FRAMEMASTER_SIZE);
fm2fb_reg_phys = fm2fb_mem_phys+FRAMEMASTER_REG;
fm2fb_reg = (unsigned char *)(fm2fb_mem+FRAMEMASTER_REG);
/* make EBU color bars on display */
ptr = (unsigned long *)fm2fb_mem;
for (y = 0; y < 576; y++) {
for (x = 0; x < 96; x++) *ptr++ = 0xffffff; /* white */
for (x = 0; x < 96; x++) *ptr++ = 0xffff00; /* yellow */
for (x = 0; x < 96; x++) *ptr++ = 0x00ffff; /* cyan */
for (x = 0; x < 96; x++) *ptr++ = 0x00ff00; /* green */
for (x = 0; x < 96; x++) *ptr++ = 0xff00ff; /* magenta */
for (x = 0; x < 96; x++) *ptr++ = 0xff0000; /* red */
for (x = 0; x < 96; x++) *ptr++ = 0x0000ff; /* blue */
for (x = 0; x < 96; x++) *ptr++ = 0x000000; /* black */
}
fm2fbcon_blank(0, NULL);
if (fm2fb_mode == -1)
fm2fb_mode = FM2FB_MODE_PAL;
fb_var = fb_var_modes[fm2fb_mode];
strcpy(fb_fix.id, is_fm ? "FrameMaster II" : "Rainbow II");
fb_fix.smem_start = fm2fb_mem_phys;
fb_fix.smem_len = FRAMEMASTER_REG;
fb_fix.type = FB_TYPE_PACKED_PIXELS;
fb_fix.type_aux = 0;
fb_fix.visual = FB_VISUAL_TRUECOLOR;
fb_fix.line_length = 768<<2;
fb_fix.mmio_start = fm2fb_reg_phys;
fb_fix.mmio_len = 8;
fb_fix.accel = FB_ACCEL_NONE;
disp.var = fb_var;
disp.cmap.start = 0;
disp.cmap.len = 0;
disp.cmap.red = disp.cmap.green = disp.cmap.blue = disp.cmap.transp = NULL;
disp.screen_base = (char *)fm2fb_mem;
disp.visual = fb_fix.visual;
disp.type = fb_fix.type;
disp.type_aux = fb_fix.type_aux;
disp.ypanstep = 0;
disp.ywrapstep = 0;
disp.line_length = fb_fix.line_length;
disp.can_soft_blank = 1;
disp.inverse = 0;
#ifdef FBCON_HAS_CFB32
disp.dispsw = &fbcon_cfb32;
disp.dispsw_data = &fbcon_cfb32_cmap;
#else
disp.dispsw = &fbcon_dummy;
#endif
disp.scrollmode = SCROLL_YREDRAW;
strcpy(fb_info.modename, fb_fix.id);
fb_info.node = -1;
fb_info.fbops = &fm2fb_ops;
fb_info.disp = &disp;
fb_info.fontname[0] = '\0';
fb_info.changevar = NULL;
fb_info.switch_con = &fm2fbcon_switch;
fb_info.updatevar = &fm2fbcon_updatevar;
fb_info.blank = &fm2fbcon_blank;
fb_info.flags = FBINFO_FLAG_DEFAULT;
fm2fb_set_var(&fb_var, -1, &fb_info);
if (register_framebuffer(&fb_info) < 0)
return -EINVAL;
printk("fb%d: %s frame buffer device\n", GET_FB_IDX(fb_info.node),
fb_fix.id);
return 0;
}
return -ENXIO;
}
int __init fm2fb_setup(char *options)
{
char *this_opt;
if (!options || !*options)
return 0;
while ((this_opt = strsep(&options, ",")) != NULL) {
if (!strncmp(this_opt, "pal", 3))
fm2fb_mode = FM2FB_MODE_PAL;
else if (!strncmp(this_opt, "ntsc", 4))
fm2fb_mode = FM2FB_MODE_NTSC;
}
return 0;
}
static int fm2fbcon_switch(int con, struct fb_info *info)
{
/* Do we have to save the colormap? */
if (fb_display[currcon].cmap.len)
fb_get_cmap(&fb_display[currcon].cmap, 1, fm2fb_getcolreg, info);
currcon = con;
/* Install new colormap */
do_install_cmap(con, info);
return 0;
}
/*
* Update the `var' structure (called by fbcon.c)
*/
static int fm2fbcon_updatevar(int con, struct fb_info *info)
{
/* Nothing */
return 0;
}
/*
* Blank the display.
*/
static void fm2fbcon_blank(int blank, struct fb_info *info)
{
unsigned char t = FRAMEMASTER_ROM;
if (!blank)
t |= FRAMEMASTER_ENABLE | FRAMEMASTER_NOLACE;
fm2fb_reg[0] = t;
}
/*
* Read a single color register and split it into
* colors/transparent. Return != 0 for invalid regno.
*/
static int fm2fb_getcolreg(u_int regno, u_int *red, u_int *green, u_int *blue,
u_int *transp, struct fb_info *info)
{
if (regno > 15)
return 1;
*red = (palette[regno].red<<8) | palette[regno].red;
*green = (palette[regno].green<<8) | palette[regno].green;
*blue = (palette[regno].blue<<8) | palette[regno].blue;
*transp = 0;
return 0;
}
/*
* 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.
*/
static int fm2fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *info)
{
if (regno > 15)
return 1;
red >>= 8;
green >>= 8;
blue >>= 8;
palette[regno].red = red;
palette[regno].green = green;
palette[regno].blue = blue;
#ifdef FBCON_HAS_CFB32
fbcon_cfb32_cmap[regno] = (red << 16) | (green << 8) | blue;
#endif
return 0;
}
static void do_install_cmap(int con, struct fb_info *info)
{
if (con != currcon)
return;
if (fb_display[con].cmap.len)
fb_set_cmap(&fb_display[con].cmap, 1, fm2fb_setcolreg, info);
else
fb_set_cmap(fb_default_cmap(256), 1, fm2fb_setcolreg, info);
}
MODULE_LICENSE("GPL");
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