296 строки
6.5 KiB
C
296 строки
6.5 KiB
C
/*
|
|
* linux/drivers/video/pmag-ba-fb.c
|
|
*
|
|
* PMAG-BA TURBOchannel Color Frame Buffer (CFB) card support,
|
|
* derived from:
|
|
* "HP300 Topcat framebuffer support (derived from macfb of all things)
|
|
* Phil Blundell <philb@gnu.org> 1998", the original code can be
|
|
* found in the file hpfb.c in the same directory.
|
|
*
|
|
* Based on digital document:
|
|
* "PMAG-BA TURBOchannel Color Frame Buffer
|
|
* Functional Specification", Revision 1.2, August 27, 1990
|
|
*
|
|
* DECstation related code Copyright (C) 1999, 2000, 2001 by
|
|
* Michael Engel <engel@unix-ag.org>,
|
|
* Karsten Merker <merker@linuxtag.org> and
|
|
* Harald Koerfgen.
|
|
* Copyright (c) 2005, 2006 Maciej W. Rozycki
|
|
* Copyright (c) 2005 James Simmons
|
|
*
|
|
* 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/compiler.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/fb.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/tc.h>
|
|
#include <linux/types.h>
|
|
|
|
#include <asm/io.h>
|
|
|
|
#include <video/pmag-ba-fb.h>
|
|
|
|
|
|
struct pmagbafb_par {
|
|
volatile void __iomem *mmio;
|
|
volatile u32 __iomem *dac;
|
|
};
|
|
|
|
|
|
static struct fb_var_screeninfo pmagbafb_defined = {
|
|
.xres = 1024,
|
|
.yres = 864,
|
|
.xres_virtual = 1024,
|
|
.yres_virtual = 864,
|
|
.bits_per_pixel = 8,
|
|
.red.length = 8,
|
|
.green.length = 8,
|
|
.blue.length = 8,
|
|
.activate = FB_ACTIVATE_NOW,
|
|
.height = -1,
|
|
.width = -1,
|
|
.accel_flags = FB_ACCEL_NONE,
|
|
.pixclock = 14452,
|
|
.left_margin = 116,
|
|
.right_margin = 12,
|
|
.upper_margin = 34,
|
|
.lower_margin = 12,
|
|
.hsync_len = 128,
|
|
.vsync_len = 3,
|
|
.sync = FB_SYNC_ON_GREEN,
|
|
.vmode = FB_VMODE_NONINTERLACED,
|
|
};
|
|
|
|
static struct fb_fix_screeninfo pmagbafb_fix = {
|
|
.id = "PMAG-BA",
|
|
.smem_len = (1024 * 1024),
|
|
.type = FB_TYPE_PACKED_PIXELS,
|
|
.visual = FB_VISUAL_PSEUDOCOLOR,
|
|
.line_length = 1024,
|
|
.mmio_len = PMAG_BA_SIZE - PMAG_BA_BT459,
|
|
};
|
|
|
|
|
|
static inline void dac_write(struct pmagbafb_par *par, unsigned int reg, u8 v)
|
|
{
|
|
writeb(v, par->dac + reg / 4);
|
|
}
|
|
|
|
static inline u8 dac_read(struct pmagbafb_par *par, unsigned int reg)
|
|
{
|
|
return readb(par->dac + reg / 4);
|
|
}
|
|
|
|
|
|
/*
|
|
* Set the palette.
|
|
*/
|
|
static int pmagbafb_setcolreg(unsigned int regno, unsigned int red,
|
|
unsigned int green, unsigned int blue,
|
|
unsigned int transp, struct fb_info *info)
|
|
{
|
|
struct pmagbafb_par *par = info->par;
|
|
|
|
if (regno >= info->cmap.len)
|
|
return 1;
|
|
|
|
red >>= 8; /* The cmap fields are 16 bits */
|
|
green >>= 8; /* wide, but the hardware colormap */
|
|
blue >>= 8; /* registers are only 8 bits wide */
|
|
|
|
mb();
|
|
dac_write(par, BT459_ADDR_LO, regno);
|
|
dac_write(par, BT459_ADDR_HI, 0x00);
|
|
wmb();
|
|
dac_write(par, BT459_CMAP, red);
|
|
wmb();
|
|
dac_write(par, BT459_CMAP, green);
|
|
wmb();
|
|
dac_write(par, BT459_CMAP, blue);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct fb_ops pmagbafb_ops = {
|
|
.owner = THIS_MODULE,
|
|
.fb_setcolreg = pmagbafb_setcolreg,
|
|
.fb_fillrect = cfb_fillrect,
|
|
.fb_copyarea = cfb_copyarea,
|
|
.fb_imageblit = cfb_imageblit,
|
|
};
|
|
|
|
|
|
/*
|
|
* Turn the hardware cursor off.
|
|
*/
|
|
static void __init pmagbafb_erase_cursor(struct fb_info *info)
|
|
{
|
|
struct pmagbafb_par *par = info->par;
|
|
|
|
mb();
|
|
dac_write(par, BT459_ADDR_LO, 0x00);
|
|
dac_write(par, BT459_ADDR_HI, 0x03);
|
|
wmb();
|
|
dac_write(par, BT459_DATA, 0x00);
|
|
}
|
|
|
|
|
|
static int pmagbafb_probe(struct device *dev)
|
|
{
|
|
struct tc_dev *tdev = to_tc_dev(dev);
|
|
resource_size_t start, len;
|
|
struct fb_info *info;
|
|
struct pmagbafb_par *par;
|
|
int err;
|
|
|
|
info = framebuffer_alloc(sizeof(struct pmagbafb_par), dev);
|
|
if (!info) {
|
|
printk(KERN_ERR "%s: Cannot allocate memory\n", dev_name(dev));
|
|
return -ENOMEM;
|
|
}
|
|
|
|
par = info->par;
|
|
dev_set_drvdata(dev, info);
|
|
|
|
if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
|
|
printk(KERN_ERR "%s: Cannot allocate color map\n",
|
|
dev_name(dev));
|
|
err = -ENOMEM;
|
|
goto err_alloc;
|
|
}
|
|
|
|
info->fbops = &pmagbafb_ops;
|
|
info->fix = pmagbafb_fix;
|
|
info->var = pmagbafb_defined;
|
|
info->flags = FBINFO_DEFAULT;
|
|
|
|
/* Request the I/O MEM resource. */
|
|
start = tdev->resource.start;
|
|
len = tdev->resource.end - start + 1;
|
|
if (!request_mem_region(start, len, dev_name(dev))) {
|
|
printk(KERN_ERR "%s: Cannot reserve FB region\n",
|
|
dev_name(dev));
|
|
err = -EBUSY;
|
|
goto err_cmap;
|
|
}
|
|
|
|
/* MMIO mapping setup. */
|
|
info->fix.mmio_start = start;
|
|
par->mmio = ioremap_nocache(info->fix.mmio_start, info->fix.mmio_len);
|
|
if (!par->mmio) {
|
|
printk(KERN_ERR "%s: Cannot map MMIO\n", dev_name(dev));
|
|
err = -ENOMEM;
|
|
goto err_resource;
|
|
}
|
|
par->dac = par->mmio + PMAG_BA_BT459;
|
|
|
|
/* Frame buffer mapping setup. */
|
|
info->fix.smem_start = start + PMAG_BA_FBMEM;
|
|
info->screen_base = ioremap_nocache(info->fix.smem_start,
|
|
info->fix.smem_len);
|
|
if (!info->screen_base) {
|
|
printk(KERN_ERR "%s: Cannot map FB\n", dev_name(dev));
|
|
err = -ENOMEM;
|
|
goto err_mmio_map;
|
|
}
|
|
info->screen_size = info->fix.smem_len;
|
|
|
|
pmagbafb_erase_cursor(info);
|
|
|
|
err = register_framebuffer(info);
|
|
if (err < 0) {
|
|
printk(KERN_ERR "%s: Cannot register framebuffer\n",
|
|
dev_name(dev));
|
|
goto err_smem_map;
|
|
}
|
|
|
|
get_device(dev);
|
|
|
|
fb_info(info, "%s frame buffer device at %s\n",
|
|
info->fix.id, dev_name(dev));
|
|
|
|
return 0;
|
|
|
|
|
|
err_smem_map:
|
|
iounmap(info->screen_base);
|
|
|
|
err_mmio_map:
|
|
iounmap(par->mmio);
|
|
|
|
err_resource:
|
|
release_mem_region(start, len);
|
|
|
|
err_cmap:
|
|
fb_dealloc_cmap(&info->cmap);
|
|
|
|
err_alloc:
|
|
framebuffer_release(info);
|
|
return err;
|
|
}
|
|
|
|
static int __exit pmagbafb_remove(struct device *dev)
|
|
{
|
|
struct tc_dev *tdev = to_tc_dev(dev);
|
|
struct fb_info *info = dev_get_drvdata(dev);
|
|
struct pmagbafb_par *par = info->par;
|
|
resource_size_t start, len;
|
|
|
|
put_device(dev);
|
|
unregister_framebuffer(info);
|
|
iounmap(info->screen_base);
|
|
iounmap(par->mmio);
|
|
start = tdev->resource.start;
|
|
len = tdev->resource.end - start + 1;
|
|
release_mem_region(start, len);
|
|
fb_dealloc_cmap(&info->cmap);
|
|
framebuffer_release(info);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Initialize the framebuffer.
|
|
*/
|
|
static const struct tc_device_id pmagbafb_tc_table[] = {
|
|
{ "DEC ", "PMAG-BA " },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(tc, pmagbafb_tc_table);
|
|
|
|
static struct tc_driver pmagbafb_driver = {
|
|
.id_table = pmagbafb_tc_table,
|
|
.driver = {
|
|
.name = "pmagbafb",
|
|
.bus = &tc_bus_type,
|
|
.probe = pmagbafb_probe,
|
|
.remove = __exit_p(pmagbafb_remove),
|
|
},
|
|
};
|
|
|
|
static int __init pmagbafb_init(void)
|
|
{
|
|
#ifndef MODULE
|
|
if (fb_get_options("pmagbafb", NULL))
|
|
return -ENXIO;
|
|
#endif
|
|
return tc_register_driver(&pmagbafb_driver);
|
|
}
|
|
|
|
static void __exit pmagbafb_exit(void)
|
|
{
|
|
tc_unregister_driver(&pmagbafb_driver);
|
|
}
|
|
|
|
|
|
module_init(pmagbafb_init);
|
|
module_exit(pmagbafb_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|