[PATCH] arm26: s/task_threas_info/task_thread_info/
[linux-2.6.git] / drivers / video / sbuslib.c
1 /* sbuslib.c: Helper library for SBUS framebuffer drivers.
2  *
3  * Copyright (C) 2003 David S. Miller (davem@redhat.com)
4  */
5
6 #include <linux/compat.h>
7 #include <linux/kernel.h>
8 #include <linux/module.h>
9 #include <linux/string.h>
10 #include <linux/fb.h>
11 #include <linux/mm.h>
12
13 #include <asm/oplib.h>
14 #include <asm/fbio.h>
15
16 #include "sbuslib.h"
17
18 void sbusfb_fill_var(struct fb_var_screeninfo *var, int prom_node, int bpp)
19 {
20         memset(var, 0, sizeof(*var));
21
22         var->xres = prom_getintdefault(prom_node, "width", 1152);
23         var->yres = prom_getintdefault(prom_node, "height", 900);
24         var->xres_virtual = var->xres;
25         var->yres_virtual = var->yres;
26         var->bits_per_pixel = bpp;
27 }
28
29 EXPORT_SYMBOL(sbusfb_fill_var);
30
31 static unsigned long sbusfb_mmapsize(long size, unsigned long fbsize)
32 {
33         if (size == SBUS_MMAP_EMPTY) return 0;
34         if (size >= 0) return size;
35         return fbsize * (-size);
36 }
37
38 int sbusfb_mmap_helper(struct sbus_mmap_map *map,
39                        unsigned long physbase,
40                        unsigned long fbsize,
41                        unsigned long iospace,
42                        struct vm_area_struct *vma)
43 {
44         unsigned int size, page, r, map_size;
45         unsigned long map_offset = 0;
46         unsigned long off;
47         int i;
48                                         
49         if (!(vma->vm_flags & (VM_SHARED | VM_MAYSHARE)))
50                 return -EINVAL;
51
52         size = vma->vm_end - vma->vm_start;
53         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
54                 return -EINVAL;
55
56         off = vma->vm_pgoff << PAGE_SHIFT;
57
58         /* To stop the swapper from even considering these pages */
59         vma->vm_flags |= (VM_IO | VM_RESERVED);
60         
61         /* Each page, see which map applies */
62         for (page = 0; page < size; ){
63                 map_size = 0;
64                 for (i = 0; map[i].size; i++)
65                         if (map[i].voff == off+page) {
66                                 map_size = sbusfb_mmapsize(map[i].size, fbsize);
67 #ifdef __sparc_v9__
68 #define POFF_MASK       (PAGE_MASK|0x1UL)
69 #else
70 #define POFF_MASK       (PAGE_MASK)
71 #endif                          
72                                 map_offset = (physbase + map[i].poff) & POFF_MASK;
73                                 break;
74                         }
75                 if (!map_size){
76                         page += PAGE_SIZE;
77                         continue;
78                 }
79                 if (page + map_size > size)
80                         map_size = size - page;
81                 r = io_remap_pfn_range(vma,
82                                         vma->vm_start + page,
83                                         MK_IOSPACE_PFN(iospace,
84                                                 map_offset >> PAGE_SHIFT),
85                                         map_size,
86                                         vma->vm_page_prot);
87                 if (r)
88                         return -EAGAIN;
89                 page += map_size;
90         }
91
92         return 0;
93 }
94 EXPORT_SYMBOL(sbusfb_mmap_helper);
95
96 int sbusfb_ioctl_helper(unsigned long cmd, unsigned long arg,
97                         struct fb_info *info,
98                         int type, int fb_depth, unsigned long fb_size)
99 {
100         switch(cmd) {
101         case FBIOGTYPE: {
102                 struct fbtype __user *f = (struct fbtype __user *) arg;
103
104                 if (put_user(type, &f->fb_type) ||
105                     __put_user(info->var.yres, &f->fb_height) ||
106                     __put_user(info->var.xres, &f->fb_width) ||
107                     __put_user(fb_depth, &f->fb_depth) ||
108                     __put_user(0, &f->fb_cmsize) ||
109                     __put_user(fb_size, &f->fb_cmsize))
110                         return -EFAULT;
111                 return 0;
112         }
113         case FBIOPUTCMAP_SPARC: {
114                 struct fbcmap __user *c = (struct fbcmap __user *) arg;
115                 struct fb_cmap cmap;
116                 u16 red, green, blue;
117                 u8 red8, green8, blue8;
118                 unsigned char __user *ured;
119                 unsigned char __user *ugreen;
120                 unsigned char __user *ublue;
121                 int index, count, i;
122
123                 if (get_user(index, &c->index) ||
124                     __get_user(count, &c->count) ||
125                     __get_user(ured, &c->red) ||
126                     __get_user(ugreen, &c->green) ||
127                     __get_user(ublue, &c->blue))
128                         return -EFAULT;
129
130                 cmap.len = 1;
131                 cmap.red = &red;
132                 cmap.green = &green;
133                 cmap.blue = &blue;
134                 cmap.transp = NULL;
135                 for (i = 0; i < count; i++) {
136                         int err;
137
138                         if (get_user(red8, &ured[i]) ||
139                             get_user(green8, &ugreen[i]) ||
140                             get_user(blue8, &ublue[i]))
141                                 return -EFAULT;
142
143                         red = red8 << 8;
144                         green = green8 << 8;
145                         blue = blue8 << 8;
146
147                         cmap.start = index + i;
148                         err = fb_set_cmap(&cmap, info);
149                         if (err)
150                                 return err;
151                 }
152                 return 0;
153         }
154         case FBIOGETCMAP_SPARC: {
155                 struct fbcmap __user *c = (struct fbcmap __user *) arg;
156                 unsigned char __user *ured;
157                 unsigned char __user *ugreen;
158                 unsigned char __user *ublue;
159                 struct fb_cmap *cmap = &info->cmap;
160                 int index, count, i;
161                 u8 red, green, blue;
162
163                 if (get_user(index, &c->index) ||
164                     __get_user(count, &c->count) ||
165                     __get_user(ured, &c->red) ||
166                     __get_user(ugreen, &c->green) ||
167                     __get_user(ublue, &c->blue))
168                         return -EFAULT;
169
170                 if (index + count > cmap->len)
171                         return -EINVAL;
172
173                 for (i = 0; i < count; i++) {
174                         red = cmap->red[index + i] >> 8;
175                         green = cmap->green[index + i] >> 8;
176                         blue = cmap->blue[index + i] >> 8;
177                         if (put_user(red, &ured[i]) ||
178                             put_user(green, &ugreen[i]) ||
179                             put_user(blue, &ublue[i]))
180                                 return -EFAULT;
181                 }
182                 return 0;
183         }
184         default:
185                 return -EINVAL;
186         };
187 }
188 EXPORT_SYMBOL(sbusfb_ioctl_helper);
189
190 #ifdef CONFIG_COMPAT
191 struct  fbcmap32 {
192         int             index;          /* first element (0 origin) */
193         int             count;
194         u32             red;
195         u32             green;
196         u32             blue;
197 };
198
199 #define FBIOPUTCMAP32   _IOW('F', 3, struct fbcmap32)
200 #define FBIOGETCMAP32   _IOW('F', 4, struct fbcmap32)
201
202 static int fbiogetputcmap(struct file *file, struct fb_info *info,
203                 unsigned int cmd, unsigned long arg)
204 {
205         struct fbcmap32 __user *argp = (void __user *)arg;
206         struct fbcmap __user *p = compat_alloc_user_space(sizeof(*p));
207         u32 addr;
208         int ret;
209
210         ret = copy_in_user(p, argp, 2 * sizeof(int));
211         ret |= get_user(addr, &argp->red);
212         ret |= put_user(compat_ptr(addr), &p->red);
213         ret |= get_user(addr, &argp->green);
214         ret |= put_user(compat_ptr(addr), &p->green);
215         ret |= get_user(addr, &argp->blue);
216         ret |= put_user(compat_ptr(addr), &p->blue);
217         if (ret)
218                 return -EFAULT;
219         return info->fbops->fb_ioctl(file->f_dentry->d_inode, file,
220                         (cmd == FBIOPUTCMAP32) ?
221                         FBIOPUTCMAP_SPARC : FBIOGETCMAP_SPARC,
222                         (unsigned long)p, info);
223 }
224
225 struct fbcursor32 {
226         short set;              /* what to set, choose from the list above */
227         short enable;           /* cursor on/off */
228         struct fbcurpos pos;    /* cursor position */
229         struct fbcurpos hot;    /* cursor hot spot */
230         struct fbcmap32 cmap;   /* color map info */
231         struct fbcurpos size;   /* cursor bit map size */
232         u32     image;          /* cursor image bits */
233         u32     mask;           /* cursor mask bits */
234 };
235
236 #define FBIOSCURSOR32   _IOW('F', 24, struct fbcursor32)
237 #define FBIOGCURSOR32   _IOW('F', 25, struct fbcursor32)
238
239 static int fbiogscursor(struct file *file, struct fb_info *info,
240                 unsigned long arg)
241 {
242         struct fbcursor __user *p = compat_alloc_user_space(sizeof(*p));
243         struct fbcursor32 __user *argp =  (void __user *)arg;
244         compat_uptr_t addr;
245         int ret;
246
247         ret = copy_in_user(p, argp,
248                               2 * sizeof (short) + 2 * sizeof(struct fbcurpos));
249         ret |= copy_in_user(&p->size, &argp->size, sizeof(struct fbcurpos));
250         ret |= copy_in_user(&p->cmap, &argp->cmap, 2 * sizeof(int));
251         ret |= get_user(addr, &argp->cmap.red);
252         ret |= put_user(compat_ptr(addr), &p->cmap.red);
253         ret |= get_user(addr, &argp->cmap.green);
254         ret |= put_user(compat_ptr(addr), &p->cmap.green);
255         ret |= get_user(addr, &argp->cmap.blue);
256         ret |= put_user(compat_ptr(addr), &p->cmap.blue);
257         ret |= get_user(addr, &argp->mask);
258         ret |= put_user(compat_ptr(addr), &p->mask);
259         ret |= get_user(addr, &argp->image);
260         ret |= put_user(compat_ptr(addr), &p->image);
261         if (ret)
262                 return -EFAULT;
263         return info->fbops->fb_ioctl(file->f_dentry->d_inode, file,
264                         FBIOSCURSOR, (unsigned long)p, info);
265 }
266
267 long sbusfb_compat_ioctl(struct file *file, unsigned int cmd,
268                 unsigned long arg, struct fb_info *info)
269 {
270         switch (cmd) {
271         case FBIOGTYPE:
272         case FBIOSATTR:
273         case FBIOGATTR:
274         case FBIOSVIDEO:
275         case FBIOGVIDEO:
276         case FBIOGCURSOR32:     /* This is not implemented yet.
277                                    Later it should be converted... */
278         case FBIOSCURPOS:
279         case FBIOGCURPOS:
280         case FBIOGCURMAX:
281                 return info->fbops->fb_ioctl(file->f_dentry->d_inode,
282                                 file, cmd, arg, info);
283         case FBIOPUTCMAP32:
284                 return fbiogetputcmap(file, info, cmd, arg);
285         case FBIOGETCMAP32:
286                 return fbiogetputcmap(file, info, cmd, arg);
287         case FBIOSCURSOR32:
288                 return fbiogscursor(file, info, arg);
289         default:
290                 return -ENOIOCTLCMD;
291         }
292 }
293 EXPORT_SYMBOL(sbusfb_compat_ioctl);
294 #endif