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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 | #include <linux/uaccess.h> | |
13 | #include <linux/of_device.h> | |
14 | ||
15 | #include <asm/fbio.h> | |
16 | ||
17 | #include "sbuslib.h" | |
18 | ||
19 | void sbusfb_fill_var(struct fb_var_screeninfo *var, struct device_node *dp, | |
20 | int bpp) | |
21 | { | |
22 | memset(var, 0, sizeof(*var)); | |
23 | ||
24 | var->xres = of_getintprop_default(dp, "width", 1152); | |
25 | var->yres = of_getintprop_default(dp, "height", 900); | |
26 | var->xres_virtual = var->xres; | |
27 | var->yres_virtual = var->yres; | |
28 | var->bits_per_pixel = bpp; | |
29 | } | |
30 | ||
31 | EXPORT_SYMBOL(sbusfb_fill_var); | |
32 | ||
33 | static 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 | ||
40 | int 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 | ||
51 | if (!(vma->vm_flags & (VM_SHARED | VM_MAYSHARE))) | |
52 | return -EINVAL; | |
53 | ||
54 | 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 | ||
63 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
64 | ||
65 | /* 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 | } | |
98 | EXPORT_SYMBOL(sbusfb_mmap_helper); | |
99 | ||
100 | int 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 | } | |
192 | EXPORT_SYMBOL(sbusfb_ioctl_helper); | |
193 | ||
194 | #ifdef CONFIG_COMPAT | |
195 | static int fbiogetputcmap(struct fb_info *info, unsigned int cmd, unsigned long arg) | |
196 | { | |
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; | |
211 | return info->fbops->fb_ioctl(info, | |
212 | (cmd == FBIOPUTCMAP32) ? | |
213 | FBIOPUTCMAP_SPARC : FBIOGETCMAP_SPARC, | |
214 | (unsigned long)p); | |
215 | } | |
216 | ||
217 | static int fbiogscursor(struct fb_info *info, unsigned long arg) | |
218 | { | |
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; | |
240 | return info->fbops->fb_ioctl(info, FBIOSCURSOR, (unsigned long)p); | |
241 | } | |
242 | ||
243 | int sbusfb_compat_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg) | |
244 | { | |
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: | |
256 | return info->fbops->fb_ioctl(info, cmd, arg); | |
257 | case FBIOPUTCMAP32: | |
258 | return fbiogetputcmap(info, cmd, arg); | |
259 | case FBIOGETCMAP32: | |
260 | return fbiogetputcmap(info, cmd, arg); | |
261 | case FBIOSCURSOR32: | |
262 | return fbiogscursor(info, arg); | |
263 | default: | |
264 | return -ENOIOCTLCMD; | |
265 | } | |
266 | } | |
267 | EXPORT_SYMBOL(sbusfb_compat_ioctl); | |
268 | #endif |