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1/*2 * linux/drivers/video/pmag-aa-fb.c3 * Copyright 2002 Karsten Merker <merker@debian.org>4 *5 * PMAG-AA TurboChannel framebuffer card support ... derived from6 * pmag-ba-fb.c, which is Copyright (C) 1999, 2000, 2001 by7 * Michael Engel <engel@unix-ag.org>, Karsten Merker <merker@debian.org>8 * and Harald Koerfgen <hkoerfg@web.de>, which itself is derived from9 * "HP300 Topcat framebuffer support (derived from macfb of all things)10 * Phil Blundell <philb@gnu.org> 1998"11 * Copyright (c) 2016 Maciej W. Rozycki12 *13 * This file is subject to the terms and conditions of the GNU General14 * Public License. See the file COPYING in the main directory of this15 * archive for more details.16 *17 * 2002-09-28 Karsten Merker <merker@linuxtag.org>18 * Version 0.01: First try to get a PMAG-AA running.19 *20 * 2003-02-24 Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de>21 * Version 0.02: Major code cleanup.22 *23 * 2003-09-21 Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de>24 * Hardware cursor support.25 *26 * 2016-02-21 Maciej W. Rozycki <macro@linux-mips.org>27 * Version 0.03: Rewritten for the new FB and TC APIs.28 */29 30#include <linux/compiler.h>31#include <linux/errno.h>32#include <linux/fb.h>33#include <linux/init.h>34#include <linux/io.h>35#include <linux/kernel.h>36#include <linux/module.h>37#include <linux/tc.h>38#include <linux/timer.h>39 40#include "bt455.h"41#include "bt431.h"42 43/* Version information */44#define DRIVER_VERSION "0.03"45#define DRIVER_AUTHOR "Karsten Merker <merker@linuxtag.org>"46#define DRIVER_DESCRIPTION "PMAG-AA Framebuffer Driver"47 48/*49 * Bt455 RAM DAC register base offset (rel. to TC slot base address).50 */51#define PMAG_AA_BT455_OFFSET 0x10000052 53/*54 * Bt431 cursor generator offset (rel. to TC slot base address).55 */56#define PMAG_AA_BT431_OFFSET 0x18000057 58/*59 * Begin of PMAG-AA framebuffer memory relative to TC slot address,60 * resolution is 1280x1024x1 (8 bits deep, but only LSB is used).61 */62#define PMAG_AA_ONBOARD_FBMEM_OFFSET 0x20000063 64struct aafb_par {65 void __iomem *mmio;66 struct bt455_regs __iomem *bt455;67 struct bt431_regs __iomem *bt431;68};69 70static const struct fb_var_screeninfo aafb_defined = {71 .xres = 1280,72 .yres = 1024,73 .xres_virtual = 2048,74 .yres_virtual = 1024,75 .bits_per_pixel = 8,76 .grayscale = 1,77 .red.length = 0,78 .green.length = 1,79 .blue.length = 0,80 .activate = FB_ACTIVATE_NOW,81 .accel_flags = FB_ACCEL_NONE,82 .pixclock = 7645,83 .left_margin = 224,84 .right_margin = 32,85 .upper_margin = 33,86 .lower_margin = 3,87 .hsync_len = 160,88 .vsync_len = 3,89 .sync = FB_SYNC_ON_GREEN,90 .vmode = FB_VMODE_NONINTERLACED,91};92 93static const struct fb_fix_screeninfo aafb_fix = {94 .id = "PMAG-AA",95 .smem_len = (2048 * 1024),96 .type = FB_TYPE_PACKED_PIXELS,97 .visual = FB_VISUAL_MONO10,98 .ypanstep = 1,99 .ywrapstep = 1,100 .line_length = 2048,101 .mmio_len = PMAG_AA_ONBOARD_FBMEM_OFFSET - PMAG_AA_BT455_OFFSET,102};103 104static int aafb_cursor(struct fb_info *info, struct fb_cursor *cursor)105{106 struct aafb_par *par = info->par;107 108 if (cursor->image.height > BT431_CURSOR_SIZE ||109 cursor->image.width > BT431_CURSOR_SIZE) {110 bt431_erase_cursor(par->bt431);111 return -EINVAL;112 }113 114 if (!cursor->enable)115 bt431_erase_cursor(par->bt431);116 117 if (cursor->set & FB_CUR_SETPOS)118 bt431_position_cursor(par->bt431,119 cursor->image.dx, cursor->image.dy);120 if (cursor->set & FB_CUR_SETCMAP) {121 u8 fg = cursor->image.fg_color ? 0xf : 0x0;122 u8 bg = cursor->image.bg_color ? 0xf : 0x0;123 124 bt455_write_cmap_entry(par->bt455, 8, bg);125 bt455_write_cmap_next(par->bt455, bg);126 bt455_write_ovly_next(par->bt455, fg);127 }128 if (cursor->set & (FB_CUR_SETSIZE | FB_CUR_SETSHAPE | FB_CUR_SETIMAGE))129 bt431_set_cursor(par->bt431,130 cursor->image.data, cursor->mask, cursor->rop,131 cursor->image.width, cursor->image.height);132 133 if (cursor->enable)134 bt431_enable_cursor(par->bt431);135 136 return 0;137}138 139/* 0 unblanks, any other blanks. */140 141static int aafb_blank(int blank, struct fb_info *info)142{143 struct aafb_par *par = info->par;144 u8 val = blank ? 0x00 : 0x0f;145 146 bt455_write_cmap_entry(par->bt455, 1, val);147 return 0;148}149 150static const struct fb_ops aafb_ops = {151 .owner = THIS_MODULE,152 FB_DEFAULT_IOMEM_OPS,153 .fb_blank = aafb_blank,154 .fb_cursor = aafb_cursor,155};156 157static int pmagaafb_probe(struct device *dev)158{159 struct tc_dev *tdev = to_tc_dev(dev);160 resource_size_t start, len;161 struct fb_info *info;162 struct aafb_par *par;163 int err;164 165 info = framebuffer_alloc(sizeof(struct aafb_par), dev);166 if (!info)167 return -ENOMEM;168 169 par = info->par;170 dev_set_drvdata(dev, info);171 172 info->fbops = &aafb_ops;173 info->fix = aafb_fix;174 info->var = aafb_defined;175 176 /* Request the I/O MEM resource. */177 start = tdev->resource.start;178 len = tdev->resource.end - start + 1;179 if (!request_mem_region(start, len, dev_name(dev))) {180 printk(KERN_ERR "%s: Cannot reserve FB region\n",181 dev_name(dev));182 err = -EBUSY;183 goto err_alloc;184 }185 186 /* MMIO mapping setup. */187 info->fix.mmio_start = start + PMAG_AA_BT455_OFFSET;188 par->mmio = ioremap(info->fix.mmio_start, info->fix.mmio_len);189 if (!par->mmio) {190 printk(KERN_ERR "%s: Cannot map MMIO\n", dev_name(dev));191 err = -ENOMEM;192 goto err_resource;193 }194 par->bt455 = par->mmio - PMAG_AA_BT455_OFFSET + PMAG_AA_BT455_OFFSET;195 par->bt431 = par->mmio - PMAG_AA_BT455_OFFSET + PMAG_AA_BT431_OFFSET;196 197 /* Frame buffer mapping setup. */198 info->fix.smem_start = start + PMAG_AA_ONBOARD_FBMEM_OFFSET;199 info->screen_base = ioremap(info->fix.smem_start,200 info->fix.smem_len);201 if (!info->screen_base) {202 printk(KERN_ERR "%s: Cannot map FB\n", dev_name(dev));203 err = -ENOMEM;204 goto err_mmio_map;205 }206 info->screen_size = info->fix.smem_len;207 208 /* Init colormap. */209 bt455_write_cmap_entry(par->bt455, 0, 0x0);210 bt455_write_cmap_next(par->bt455, 0xf);211 212 /* Init hardware cursor. */213 bt431_erase_cursor(par->bt431);214 bt431_init_cursor(par->bt431);215 216 err = register_framebuffer(info);217 if (err < 0) {218 printk(KERN_ERR "%s: Cannot register framebuffer\n",219 dev_name(dev));220 goto err_smem_map;221 }222 223 get_device(dev);224 225 pr_info("fb%d: %s frame buffer device at %s\n",226 info->node, info->fix.id, dev_name(dev));227 228 return 0;229 230 231err_smem_map:232 iounmap(info->screen_base);233 234err_mmio_map:235 iounmap(par->mmio);236 237err_resource:238 release_mem_region(start, len);239 240err_alloc:241 framebuffer_release(info);242 return err;243}244 245static int pmagaafb_remove(struct device *dev)246{247 struct tc_dev *tdev = to_tc_dev(dev);248 struct fb_info *info = dev_get_drvdata(dev);249 struct aafb_par *par = info->par;250 resource_size_t start, len;251 252 put_device(dev);253 unregister_framebuffer(info);254 iounmap(info->screen_base);255 iounmap(par->mmio);256 start = tdev->resource.start;257 len = tdev->resource.end - start + 1;258 release_mem_region(start, len);259 framebuffer_release(info);260 return 0;261}262 263/*264 * Initialise the framebuffer.265 */266static const struct tc_device_id pmagaafb_tc_table[] = {267 { "DEC ", "PMAG-AA " },268 { }269};270MODULE_DEVICE_TABLE(tc, pmagaafb_tc_table);271 272static struct tc_driver pmagaafb_driver = {273 .id_table = pmagaafb_tc_table,274 .driver = {275 .name = "pmagaafb",276 .bus = &tc_bus_type,277 .probe = pmagaafb_probe,278 .remove = pmagaafb_remove,279 },280};281 282static int __init pmagaafb_init(void)283{284#ifndef MODULE285 if (fb_get_options("pmagaafb", NULL))286 return -ENXIO;287#endif288 return tc_register_driver(&pmagaafb_driver);289}290 291static void __exit pmagaafb_exit(void)292{293 tc_unregister_driver(&pmagaafb_driver);294}295 296module_init(pmagaafb_init);297module_exit(pmagaafb_exit);298 299MODULE_AUTHOR(DRIVER_AUTHOR);300MODULE_DESCRIPTION(DRIVER_DESCRIPTION);301MODULE_LICENSE("GPL");302