307 lines
7.5 KiB
C
307 lines
7.5 KiB
C
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/*
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* linux/drivers/video/pmag-aa-fb.c
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* Copyright 2002 Karsten Merker <merker@debian.org>
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*
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* PMAG-AA TurboChannel framebuffer card support ... derived from
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* pmag-ba-fb.c, which is Copyright (C) 1999, 2000, 2001 by
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* Michael Engel <engel@unix-ag.org>, Karsten Merker <merker@debian.org>
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* and Harald Koerfgen <hkoerfg@web.de>, which itself is derived from
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* "HP300 Topcat framebuffer support (derived from macfb of all things)
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* Phil Blundell <philb@gnu.org> 1998"
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* Copyright (c) 2016 Maciej W. Rozycki
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file COPYING in the main directory of this
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* archive for more details.
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*
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* 2002-09-28 Karsten Merker <merker@linuxtag.org>
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* Version 0.01: First try to get a PMAG-AA running.
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*
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* 2003-02-24 Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de>
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* Version 0.02: Major code cleanup.
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*
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* 2003-09-21 Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de>
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* Hardware cursor support.
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*
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* 2016-02-21 Maciej W. Rozycki <macro@linux-mips.org>
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* Version 0.03: Rewritten for the new FB and TC APIs.
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*/
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#include <linux/compiler.h>
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#include <linux/errno.h>
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#include <linux/fb.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/tc.h>
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#include <linux/timer.h>
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#include "bt455.h"
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#include "bt431.h"
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/* Version information */
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#define DRIVER_VERSION "0.03"
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#define DRIVER_AUTHOR "Karsten Merker <merker@linuxtag.org>"
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#define DRIVER_DESCRIPTION "PMAG-AA Framebuffer Driver"
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/*
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* Bt455 RAM DAC register base offset (rel. to TC slot base address).
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*/
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#define PMAG_AA_BT455_OFFSET 0x100000
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/*
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* Bt431 cursor generator offset (rel. to TC slot base address).
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*/
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#define PMAG_AA_BT431_OFFSET 0x180000
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/*
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* Begin of PMAG-AA framebuffer memory relative to TC slot address,
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* resolution is 1280x1024x1 (8 bits deep, but only LSB is used).
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*/
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#define PMAG_AA_ONBOARD_FBMEM_OFFSET 0x200000
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struct aafb_par {
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void __iomem *mmio;
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struct bt455_regs __iomem *bt455;
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struct bt431_regs __iomem *bt431;
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};
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static const struct fb_var_screeninfo aafb_defined = {
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.xres = 1280,
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.yres = 1024,
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.xres_virtual = 2048,
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.yres_virtual = 1024,
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.bits_per_pixel = 8,
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.grayscale = 1,
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.red.length = 0,
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.green.length = 1,
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.blue.length = 0,
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.activate = FB_ACTIVATE_NOW,
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.accel_flags = FB_ACCEL_NONE,
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.pixclock = 7645,
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.left_margin = 224,
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.right_margin = 32,
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.upper_margin = 33,
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.lower_margin = 3,
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.hsync_len = 160,
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.vsync_len = 3,
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.sync = FB_SYNC_ON_GREEN,
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.vmode = FB_VMODE_NONINTERLACED,
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};
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static const struct fb_fix_screeninfo aafb_fix = {
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.id = "PMAG-AA",
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.smem_len = (2048 * 1024),
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.type = FB_TYPE_PACKED_PIXELS,
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.visual = FB_VISUAL_MONO10,
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.ypanstep = 1,
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.ywrapstep = 1,
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.line_length = 2048,
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.mmio_len = PMAG_AA_ONBOARD_FBMEM_OFFSET - PMAG_AA_BT455_OFFSET,
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};
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static int aafb_cursor(struct fb_info *info, struct fb_cursor *cursor)
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{
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struct aafb_par *par = info->par;
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if (cursor->image.height > BT431_CURSOR_SIZE ||
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cursor->image.width > BT431_CURSOR_SIZE) {
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bt431_erase_cursor(par->bt431);
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return -EINVAL;
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}
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if (!cursor->enable)
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bt431_erase_cursor(par->bt431);
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if (cursor->set & FB_CUR_SETPOS)
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bt431_position_cursor(par->bt431,
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cursor->image.dx, cursor->image.dy);
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if (cursor->set & FB_CUR_SETCMAP) {
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u8 fg = cursor->image.fg_color ? 0xf : 0x0;
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u8 bg = cursor->image.bg_color ? 0xf : 0x0;
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bt455_write_cmap_entry(par->bt455, 8, bg);
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bt455_write_cmap_next(par->bt455, bg);
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bt455_write_ovly_next(par->bt455, fg);
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}
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if (cursor->set & (FB_CUR_SETSIZE | FB_CUR_SETSHAPE | FB_CUR_SETIMAGE))
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bt431_set_cursor(par->bt431,
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cursor->image.data, cursor->mask, cursor->rop,
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cursor->image.width, cursor->image.height);
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if (cursor->enable)
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bt431_enable_cursor(par->bt431);
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return 0;
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}
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/* 0 unblanks, any other blanks. */
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static int aafb_blank(int blank, struct fb_info *info)
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{
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struct aafb_par *par = info->par;
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u8 val = blank ? 0x00 : 0x0f;
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bt455_write_cmap_entry(par->bt455, 1, val);
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return 0;
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}
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static struct fb_ops aafb_ops = {
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.owner = THIS_MODULE,
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.fb_blank = aafb_blank,
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.fb_fillrect = cfb_fillrect,
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.fb_copyarea = cfb_copyarea,
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.fb_imageblit = cfb_imageblit,
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.fb_cursor = aafb_cursor,
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};
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static int pmagaafb_probe(struct device *dev)
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{
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struct tc_dev *tdev = to_tc_dev(dev);
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resource_size_t start, len;
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struct fb_info *info;
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struct aafb_par *par;
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int err;
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info = framebuffer_alloc(sizeof(struct aafb_par), dev);
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if (!info) {
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printk(KERN_ERR "%s: Cannot allocate memory\n", dev_name(dev));
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return -ENOMEM;
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}
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par = info->par;
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dev_set_drvdata(dev, info);
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info->fbops = &aafb_ops;
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info->fix = aafb_fix;
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info->var = aafb_defined;
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info->flags = FBINFO_DEFAULT;
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/* Request the I/O MEM resource. */
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start = tdev->resource.start;
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len = tdev->resource.end - start + 1;
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if (!request_mem_region(start, len, dev_name(dev))) {
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printk(KERN_ERR "%s: Cannot reserve FB region\n",
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dev_name(dev));
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err = -EBUSY;
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goto err_alloc;
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}
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/* MMIO mapping setup. */
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info->fix.mmio_start = start + PMAG_AA_BT455_OFFSET;
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par->mmio = ioremap_nocache(info->fix.mmio_start, info->fix.mmio_len);
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if (!par->mmio) {
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printk(KERN_ERR "%s: Cannot map MMIO\n", dev_name(dev));
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err = -ENOMEM;
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goto err_resource;
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}
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par->bt455 = par->mmio - PMAG_AA_BT455_OFFSET + PMAG_AA_BT455_OFFSET;
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par->bt431 = par->mmio - PMAG_AA_BT455_OFFSET + PMAG_AA_BT431_OFFSET;
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/* Frame buffer mapping setup. */
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info->fix.smem_start = start + PMAG_AA_ONBOARD_FBMEM_OFFSET;
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info->screen_base = ioremap_nocache(info->fix.smem_start,
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info->fix.smem_len);
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if (!info->screen_base) {
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printk(KERN_ERR "%s: Cannot map FB\n", dev_name(dev));
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err = -ENOMEM;
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goto err_mmio_map;
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}
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info->screen_size = info->fix.smem_len;
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/* Init colormap. */
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bt455_write_cmap_entry(par->bt455, 0, 0x0);
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bt455_write_cmap_next(par->bt455, 0xf);
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/* Init hardware cursor. */
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bt431_erase_cursor(par->bt431);
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bt431_init_cursor(par->bt431);
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err = register_framebuffer(info);
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if (err < 0) {
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printk(KERN_ERR "%s: Cannot register framebuffer\n",
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dev_name(dev));
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goto err_smem_map;
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}
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get_device(dev);
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pr_info("fb%d: %s frame buffer device at %s\n",
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info->node, info->fix.id, dev_name(dev));
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return 0;
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err_smem_map:
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iounmap(info->screen_base);
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err_mmio_map:
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iounmap(par->mmio);
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err_resource:
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release_mem_region(start, len);
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err_alloc:
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framebuffer_release(info);
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return err;
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}
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static int pmagaafb_remove(struct device *dev)
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{
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struct tc_dev *tdev = to_tc_dev(dev);
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struct fb_info *info = dev_get_drvdata(dev);
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struct aafb_par *par = info->par;
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resource_size_t start, len;
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put_device(dev);
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unregister_framebuffer(info);
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iounmap(info->screen_base);
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iounmap(par->mmio);
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start = tdev->resource.start;
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len = tdev->resource.end - start + 1;
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release_mem_region(start, len);
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framebuffer_release(info);
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return 0;
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}
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/*
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* Initialise the framebuffer.
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*/
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static const struct tc_device_id pmagaafb_tc_table[] = {
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{ "DEC ", "PMAG-AA " },
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{ }
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};
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MODULE_DEVICE_TABLE(tc, pmagaafb_tc_table);
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static struct tc_driver pmagaafb_driver = {
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.id_table = pmagaafb_tc_table,
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.driver = {
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.name = "pmagaafb",
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.bus = &tc_bus_type,
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.probe = pmagaafb_probe,
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.remove = pmagaafb_remove,
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},
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};
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static int __init pmagaafb_init(void)
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{
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#ifndef MODULE
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if (fb_get_options("pmagaafb", NULL))
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return -ENXIO;
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#endif
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return tc_register_driver(&pmagaafb_driver);
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}
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static void __exit pmagaafb_exit(void)
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{
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tc_unregister_driver(&pmagaafb_driver);
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}
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module_init(pmagaafb_init);
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module_exit(pmagaafb_exit);
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_DESCRIPTION(DRIVER_DESCRIPTION);
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MODULE_LICENSE("GPL");
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