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304 lines
7.4 KiB
304 lines
7.4 KiB
/* |
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* linux/drivers/video/pmag-aa-fb.c |
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* Copyright 2002 Karsten Merker <[email protected]> |
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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 <[email protected]>, Karsten Merker <[email protected]> |
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* and Harald Koerfgen <[email protected]>, 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 <[email protected]> 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 <[email protected]> |
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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 <[email protected]> |
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* Version 0.02: Major code cleanup. |
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* |
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* 2003-09-21 Thiemo Seufer <[email protected]> |
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* Hardware cursor support. |
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* |
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* 2016-02-21 Maciej W. Rozycki <[email protected]> |
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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 <[email protected]>" |
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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 const 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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return -ENOMEM; |
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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(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(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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