blob: 37d764ad56b052a8249dc8d9062c7af07a09d167 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* sbuslib.c: Helper library for SBUS framebuffer drivers.
2 *
3 * Copyright (C) 2003 David S. Miller (davem@redhat.com)
4 */
5
Christoph Hellwig9ffb83b2005-11-12 12:11:12 -08006#include <linux/compat.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07007#include <linux/kernel.h>
8#include <linux/module.h>
9#include <linux/string.h>
10#include <linux/fb.h>
11#include <linux/mm.h>
Robert Reif631a9dc2008-02-12 18:23:31 -080012#include <linux/uaccess.h>
Robert Reif6cd5a862008-05-08 21:37:30 -070013#include <linux/of_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <asm/fbio.h>
16
17#include "sbuslib.h"
18
Robert Reif6cd5a862008-05-08 21:37:30 -070019void sbusfb_fill_var(struct fb_var_screeninfo *var, struct device_node *dp,
20 int bpp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070021{
22 memset(var, 0, sizeof(*var));
23
Robert Reif6cd5a862008-05-08 21:37:30 -070024 var->xres = of_getintprop_default(dp, "width", 1152);
25 var->yres = of_getintprop_default(dp, "height", 900);
Linus Torvalds1da177e2005-04-16 15:20:36 -070026 var->xres_virtual = var->xres;
27 var->yres_virtual = var->yres;
28 var->bits_per_pixel = bpp;
29}
30
31EXPORT_SYMBOL(sbusfb_fill_var);
32
33static unsigned long sbusfb_mmapsize(long size, unsigned long fbsize)
34{
35 if (size == SBUS_MMAP_EMPTY) return 0;
36 if (size >= 0) return size;
37 return fbsize * (-size);
38}
39
40int sbusfb_mmap_helper(struct sbus_mmap_map *map,
41 unsigned long physbase,
42 unsigned long fbsize,
43 unsigned long iospace,
44 struct vm_area_struct *vma)
45{
46 unsigned int size, page, r, map_size;
47 unsigned long map_offset = 0;
48 unsigned long off;
49 int i;
50
David S. Millere445ee62005-12-24 12:06:10 -080051 if (!(vma->vm_flags & (VM_SHARED | VM_MAYSHARE)))
52 return -EINVAL;
53
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 size = vma->vm_end - vma->vm_start;
55 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
56 return -EINVAL;
57
58 off = vma->vm_pgoff << PAGE_SHIFT;
59
60 /* To stop the swapper from even considering these pages */
61 vma->vm_flags |= (VM_IO | VM_RESERVED);
62
David S. Miller14778d92006-03-21 02:29:39 -080063 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
64
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 /* Each page, see which map applies */
66 for (page = 0; page < size; ){
67 map_size = 0;
68 for (i = 0; map[i].size; i++)
69 if (map[i].voff == off+page) {
70 map_size = sbusfb_mmapsize(map[i].size, fbsize);
71#ifdef __sparc_v9__
72#define POFF_MASK (PAGE_MASK|0x1UL)
73#else
74#define POFF_MASK (PAGE_MASK)
75#endif
76 map_offset = (physbase + map[i].poff) & POFF_MASK;
77 break;
78 }
79 if (!map_size){
80 page += PAGE_SIZE;
81 continue;
82 }
83 if (page + map_size > size)
84 map_size = size - page;
85 r = io_remap_pfn_range(vma,
86 vma->vm_start + page,
87 MK_IOSPACE_PFN(iospace,
88 map_offset >> PAGE_SHIFT),
89 map_size,
90 vma->vm_page_prot);
91 if (r)
92 return -EAGAIN;
93 page += map_size;
94 }
95
96 return 0;
97}
98EXPORT_SYMBOL(sbusfb_mmap_helper);
99
100int sbusfb_ioctl_helper(unsigned long cmd, unsigned long arg,
101 struct fb_info *info,
102 int type, int fb_depth, unsigned long fb_size)
103{
104 switch(cmd) {
105 case FBIOGTYPE: {
106 struct fbtype __user *f = (struct fbtype __user *) arg;
107
108 if (put_user(type, &f->fb_type) ||
109 __put_user(info->var.yres, &f->fb_height) ||
110 __put_user(info->var.xres, &f->fb_width) ||
111 __put_user(fb_depth, &f->fb_depth) ||
112 __put_user(0, &f->fb_cmsize) ||
113 __put_user(fb_size, &f->fb_cmsize))
114 return -EFAULT;
115 return 0;
116 }
117 case FBIOPUTCMAP_SPARC: {
118 struct fbcmap __user *c = (struct fbcmap __user *) arg;
119 struct fb_cmap cmap;
120 u16 red, green, blue;
121 u8 red8, green8, blue8;
122 unsigned char __user *ured;
123 unsigned char __user *ugreen;
124 unsigned char __user *ublue;
125 int index, count, i;
126
127 if (get_user(index, &c->index) ||
128 __get_user(count, &c->count) ||
129 __get_user(ured, &c->red) ||
130 __get_user(ugreen, &c->green) ||
131 __get_user(ublue, &c->blue))
132 return -EFAULT;
133
134 cmap.len = 1;
135 cmap.red = &red;
136 cmap.green = &green;
137 cmap.blue = &blue;
138 cmap.transp = NULL;
139 for (i = 0; i < count; i++) {
140 int err;
141
142 if (get_user(red8, &ured[i]) ||
143 get_user(green8, &ugreen[i]) ||
144 get_user(blue8, &ublue[i]))
145 return -EFAULT;
146
147 red = red8 << 8;
148 green = green8 << 8;
149 blue = blue8 << 8;
150
151 cmap.start = index + i;
152 err = fb_set_cmap(&cmap, info);
153 if (err)
154 return err;
155 }
156 return 0;
157 }
158 case FBIOGETCMAP_SPARC: {
159 struct fbcmap __user *c = (struct fbcmap __user *) arg;
160 unsigned char __user *ured;
161 unsigned char __user *ugreen;
162 unsigned char __user *ublue;
163 struct fb_cmap *cmap = &info->cmap;
164 int index, count, i;
165 u8 red, green, blue;
166
167 if (get_user(index, &c->index) ||
168 __get_user(count, &c->count) ||
169 __get_user(ured, &c->red) ||
170 __get_user(ugreen, &c->green) ||
171 __get_user(ublue, &c->blue))
172 return -EFAULT;
173
174 if (index + count > cmap->len)
175 return -EINVAL;
176
177 for (i = 0; i < count; i++) {
178 red = cmap->red[index + i] >> 8;
179 green = cmap->green[index + i] >> 8;
180 blue = cmap->blue[index + i] >> 8;
181 if (put_user(red, &ured[i]) ||
182 put_user(green, &ugreen[i]) ||
183 put_user(blue, &ublue[i]))
184 return -EFAULT;
185 }
186 return 0;
187 }
188 default:
189 return -EINVAL;
190 };
191}
192EXPORT_SYMBOL(sbusfb_ioctl_helper);
Christoph Hellwig9ffb83b2005-11-12 12:11:12 -0800193
194#ifdef CONFIG_COMPAT
David S. Millerc7006632006-01-17 15:53:11 -0800195static int fbiogetputcmap(struct fb_info *info, unsigned int cmd, unsigned long arg)
Christoph Hellwig9ffb83b2005-11-12 12:11:12 -0800196{
197 struct fbcmap32 __user *argp = (void __user *)arg;
198 struct fbcmap __user *p = compat_alloc_user_space(sizeof(*p));
199 u32 addr;
200 int ret;
201
202 ret = copy_in_user(p, argp, 2 * sizeof(int));
203 ret |= get_user(addr, &argp->red);
204 ret |= put_user(compat_ptr(addr), &p->red);
205 ret |= get_user(addr, &argp->green);
206 ret |= put_user(compat_ptr(addr), &p->green);
207 ret |= get_user(addr, &argp->blue);
208 ret |= put_user(compat_ptr(addr), &p->blue);
209 if (ret)
210 return -EFAULT;
Christoph Hellwig5ebdce72006-01-16 22:14:06 -0800211 return info->fbops->fb_ioctl(info,
Christoph Hellwig9ffb83b2005-11-12 12:11:12 -0800212 (cmd == FBIOPUTCMAP32) ?
213 FBIOPUTCMAP_SPARC : FBIOGETCMAP_SPARC,
Christoph Hellwig5ebdce72006-01-16 22:14:06 -0800214 (unsigned long)p);
Christoph Hellwig9ffb83b2005-11-12 12:11:12 -0800215}
216
David S. Millerc7006632006-01-17 15:53:11 -0800217static int fbiogscursor(struct fb_info *info, unsigned long arg)
Christoph Hellwig9ffb83b2005-11-12 12:11:12 -0800218{
219 struct fbcursor __user *p = compat_alloc_user_space(sizeof(*p));
220 struct fbcursor32 __user *argp = (void __user *)arg;
221 compat_uptr_t addr;
222 int ret;
223
224 ret = copy_in_user(p, argp,
225 2 * sizeof (short) + 2 * sizeof(struct fbcurpos));
226 ret |= copy_in_user(&p->size, &argp->size, sizeof(struct fbcurpos));
227 ret |= copy_in_user(&p->cmap, &argp->cmap, 2 * sizeof(int));
228 ret |= get_user(addr, &argp->cmap.red);
229 ret |= put_user(compat_ptr(addr), &p->cmap.red);
230 ret |= get_user(addr, &argp->cmap.green);
231 ret |= put_user(compat_ptr(addr), &p->cmap.green);
232 ret |= get_user(addr, &argp->cmap.blue);
233 ret |= put_user(compat_ptr(addr), &p->cmap.blue);
234 ret |= get_user(addr, &argp->mask);
235 ret |= put_user(compat_ptr(addr), &p->mask);
236 ret |= get_user(addr, &argp->image);
237 ret |= put_user(compat_ptr(addr), &p->image);
238 if (ret)
239 return -EFAULT;
Christoph Hellwig5ebdce72006-01-16 22:14:06 -0800240 return info->fbops->fb_ioctl(info, FBIOSCURSOR, (unsigned long)p);
Christoph Hellwig9ffb83b2005-11-12 12:11:12 -0800241}
242
David S. Millerc7006632006-01-17 15:53:11 -0800243int sbusfb_compat_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
Christoph Hellwig9ffb83b2005-11-12 12:11:12 -0800244{
245 switch (cmd) {
246 case FBIOGTYPE:
247 case FBIOSATTR:
248 case FBIOGATTR:
249 case FBIOSVIDEO:
250 case FBIOGVIDEO:
251 case FBIOGCURSOR32: /* This is not implemented yet.
252 Later it should be converted... */
253 case FBIOSCURPOS:
254 case FBIOGCURPOS:
255 case FBIOGCURMAX:
Christoph Hellwig5ebdce72006-01-16 22:14:06 -0800256 return info->fbops->fb_ioctl(info, cmd, arg);
Christoph Hellwig9ffb83b2005-11-12 12:11:12 -0800257 case FBIOPUTCMAP32:
Christoph Hellwig5ebdce72006-01-16 22:14:06 -0800258 return fbiogetputcmap(info, cmd, arg);
Christoph Hellwig9ffb83b2005-11-12 12:11:12 -0800259 case FBIOGETCMAP32:
Christoph Hellwig5ebdce72006-01-16 22:14:06 -0800260 return fbiogetputcmap(info, cmd, arg);
Christoph Hellwig9ffb83b2005-11-12 12:11:12 -0800261 case FBIOSCURSOR32:
Christoph Hellwig5ebdce72006-01-16 22:14:06 -0800262 return fbiogscursor(info, arg);
Christoph Hellwig9ffb83b2005-11-12 12:11:12 -0800263 default:
264 return -ENOIOCTLCMD;
265 }
266}
267EXPORT_SYMBOL(sbusfb_compat_ioctl);
268#endif