Commit | Line | Data |
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90b4f9ac EH |
1 | /* |
2 | * framebuffer driver for Intel Based Mac's | |
3 | * | |
4 | * (c) 2006 Edgar Hucek <gimli@dark-green.com> | |
5 | * Original imac driver written by Gerd Knorr <kraxel@goldbach.in-berlin.de> | |
6 | * | |
7 | */ | |
8 | ||
9 | #include <linux/delay.h> | |
10 | #include <linux/errno.h> | |
11 | #include <linux/fb.h> | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/ioport.h> | |
15 | #include <linux/mm.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/platform_device.h> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/string.h> | |
20 | #include <linux/tty.h> | |
21 | ||
22 | #include <asm/io.h> | |
23 | ||
24 | #include <video/vga.h> | |
25 | ||
26 | typedef enum _MAC_TYPE { | |
27 | M_I17, | |
28 | M_I20, | |
29 | M_MINI, | |
30 | M_MACBOOK, | |
31 | M_NEW | |
32 | } MAC_TYPE; | |
33 | ||
34 | /* --------------------------------------------------------------------- */ | |
35 | ||
36 | static struct fb_var_screeninfo imacfb_defined __initdata = { | |
37 | .activate = FB_ACTIVATE_NOW, | |
38 | .height = -1, | |
39 | .width = -1, | |
40 | .right_margin = 32, | |
41 | .upper_margin = 16, | |
42 | .lower_margin = 4, | |
43 | .vsync_len = 4, | |
44 | .vmode = FB_VMODE_NONINTERLACED, | |
45 | }; | |
46 | ||
47 | static struct fb_fix_screeninfo imacfb_fix __initdata = { | |
48 | .id = "IMAC VGA", | |
49 | .type = FB_TYPE_PACKED_PIXELS, | |
50 | .accel = FB_ACCEL_NONE, | |
51 | .visual = FB_VISUAL_TRUECOLOR, | |
52 | }; | |
53 | ||
54 | static int inverse; | |
55 | static int model = M_NEW; | |
56 | static int manual_height; | |
57 | static int manual_width; | |
58 | ||
59 | #define DEFAULT_FB_MEM 1024*1024*16 | |
60 | ||
61 | /* --------------------------------------------------------------------- */ | |
62 | ||
63 | static int imacfb_setcolreg(unsigned regno, unsigned red, unsigned green, | |
64 | unsigned blue, unsigned transp, | |
65 | struct fb_info *info) | |
66 | { | |
67 | /* | |
68 | * Set a single color register. The values supplied are | |
69 | * already rounded down to the hardware's capabilities | |
70 | * (according to the entries in the `var' structure). Return | |
71 | * != 0 for invalid regno. | |
72 | */ | |
73 | ||
74 | if (regno >= info->cmap.len) | |
75 | return 1; | |
76 | ||
77 | if (regno < 16) { | |
78 | red >>= 8; | |
79 | green >>= 8; | |
80 | blue >>= 8; | |
81 | ((u32 *)(info->pseudo_palette))[regno] = | |
82 | (red << info->var.red.offset) | | |
83 | (green << info->var.green.offset) | | |
84 | (blue << info->var.blue.offset); | |
85 | } | |
86 | return 0; | |
87 | } | |
88 | ||
89 | static struct fb_ops imacfb_ops = { | |
90 | .owner = THIS_MODULE, | |
91 | .fb_setcolreg = imacfb_setcolreg, | |
92 | .fb_fillrect = cfb_fillrect, | |
93 | .fb_copyarea = cfb_copyarea, | |
94 | .fb_imageblit = cfb_imageblit, | |
95 | }; | |
96 | ||
97 | static int __init imacfb_setup(char *options) | |
98 | { | |
99 | char *this_opt; | |
100 | ||
101 | if (!options || !*options) | |
102 | return 0; | |
103 | ||
104 | while ((this_opt = strsep(&options, ",")) != NULL) { | |
105 | if (!*this_opt) continue; | |
106 | ||
107 | if (!strcmp(this_opt, "inverse")) | |
108 | inverse = 1; | |
109 | else if (!strcmp(this_opt, "i17")) | |
110 | model = M_I17; | |
111 | else if (!strcmp(this_opt, "i20")) | |
112 | model = M_I20; | |
113 | else if (!strcmp(this_opt, "mini")) | |
114 | model = M_MINI; | |
115 | else if (!strcmp(this_opt, "macbook")) | |
116 | model = M_MACBOOK; | |
117 | else if (!strncmp(this_opt, "height:", 7)) | |
118 | manual_height = simple_strtoul(this_opt+7, NULL, 0); | |
119 | else if (!strncmp(this_opt, "width:", 6)) | |
120 | manual_width = simple_strtoul(this_opt+6, NULL, 0); | |
121 | } | |
122 | return 0; | |
123 | } | |
124 | ||
125 | static int __init imacfb_probe(struct platform_device *dev) | |
126 | { | |
127 | struct fb_info *info; | |
128 | int err; | |
129 | unsigned int size_vmode; | |
130 | unsigned int size_remap; | |
131 | unsigned int size_total; | |
132 | ||
133 | screen_info.lfb_depth = 32; | |
134 | screen_info.lfb_size = DEFAULT_FB_MEM / 0x10000; | |
135 | screen_info.pages=1; | |
136 | screen_info.blue_size = 8; | |
137 | screen_info.blue_pos = 0; | |
138 | screen_info.green_size = 8; | |
139 | screen_info.green_pos = 8; | |
140 | screen_info.red_size = 8; | |
141 | screen_info.red_pos = 16; | |
142 | screen_info.rsvd_size = 8; | |
143 | screen_info.rsvd_pos = 24; | |
144 | ||
145 | switch (model) { | |
146 | case M_I17: | |
147 | screen_info.lfb_width = 1440; | |
148 | screen_info.lfb_height = 900; | |
149 | screen_info.lfb_linelength = 1472 * 4; | |
150 | screen_info.lfb_base = 0x80010000; | |
151 | break; | |
152 | case M_NEW: | |
153 | case M_I20: | |
154 | screen_info.lfb_width = 1680; | |
155 | screen_info.lfb_height = 1050; | |
156 | screen_info.lfb_linelength = 1728 * 4; | |
157 | screen_info.lfb_base = 0x80010000; | |
158 | break; | |
159 | case M_MINI: | |
160 | screen_info.lfb_width = 1024; | |
161 | screen_info.lfb_height = 768; | |
162 | screen_info.lfb_linelength = 2048 * 4; | |
163 | screen_info.lfb_base = 0x80000000; | |
164 | break; | |
165 | case M_MACBOOK: | |
166 | screen_info.lfb_width = 1280; | |
167 | screen_info.lfb_height = 800; | |
168 | screen_info.lfb_linelength = 2048 * 4; | |
169 | screen_info.lfb_base = 0x80000000; | |
170 | break; | |
171 | } | |
172 | ||
173 | /* if the user wants to manually specify height/width, | |
174 | we will override the defaults */ | |
175 | /* TODO: eventually get auto-detection working */ | |
176 | if (manual_height > 0) | |
177 | screen_info.lfb_height = manual_height; | |
178 | if (manual_width > 0) | |
179 | screen_info.lfb_width = manual_width; | |
180 | ||
181 | imacfb_fix.smem_start = screen_info.lfb_base; | |
182 | imacfb_defined.bits_per_pixel = screen_info.lfb_depth; | |
183 | imacfb_defined.xres = screen_info.lfb_width; | |
184 | imacfb_defined.yres = screen_info.lfb_height; | |
185 | imacfb_fix.line_length = screen_info.lfb_linelength; | |
186 | ||
187 | /* size_vmode -- that is the amount of memory needed for the | |
188 | * used video mode, i.e. the minimum amount of | |
189 | * memory we need. */ | |
190 | size_vmode = imacfb_defined.yres * imacfb_fix.line_length; | |
191 | ||
192 | /* size_total -- all video memory we have. Used for | |
193 | * entries, ressource allocation and bounds | |
194 | * checking. */ | |
195 | size_total = screen_info.lfb_size * 65536; | |
196 | if (size_total < size_vmode) | |
197 | size_total = size_vmode; | |
198 | ||
199 | /* size_remap -- the amount of video memory we are going to | |
200 | * use for imacfb. With modern cards it is no | |
201 | * option to simply use size_total as that | |
202 | * wastes plenty of kernel address space. */ | |
203 | size_remap = size_vmode * 2; | |
204 | if (size_remap < size_vmode) | |
205 | size_remap = size_vmode; | |
206 | if (size_remap > size_total) | |
207 | size_remap = size_total; | |
208 | imacfb_fix.smem_len = size_remap; | |
209 | ||
210 | #ifndef __i386__ | |
211 | screen_info.imacpm_seg = 0; | |
212 | #endif | |
213 | ||
214 | if (!request_mem_region(imacfb_fix.smem_start, size_total, "imacfb")) { | |
215 | printk(KERN_WARNING | |
216 | "imacfb: cannot reserve video memory at 0x%lx\n", | |
217 | imacfb_fix.smem_start); | |
218 | /* We cannot make this fatal. Sometimes this comes from magic | |
219 | spaces our resource handlers simply don't know about */ | |
220 | } | |
221 | ||
222 | info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev); | |
223 | if (!info) { | |
224 | err = -ENOMEM; | |
225 | goto err_release_mem; | |
226 | } | |
227 | info->pseudo_palette = info->par; | |
228 | info->par = NULL; | |
229 | ||
230 | info->screen_base = ioremap(imacfb_fix.smem_start, imacfb_fix.smem_len); | |
231 | if (!info->screen_base) { | |
232 | printk(KERN_ERR "imacfb: abort, cannot ioremap video memory " | |
233 | "0x%x @ 0x%lx\n", | |
234 | imacfb_fix.smem_len, imacfb_fix.smem_start); | |
235 | err = -EIO; | |
236 | goto err_unmap; | |
237 | } | |
238 | ||
239 | printk(KERN_INFO "imacfb: framebuffer at 0x%lx, mapped to 0x%p, " | |
240 | "using %dk, total %dk\n", | |
241 | imacfb_fix.smem_start, info->screen_base, | |
242 | size_remap/1024, size_total/1024); | |
243 | printk(KERN_INFO "imacfb: mode is %dx%dx%d, linelength=%d, pages=%d\n", | |
244 | imacfb_defined.xres, imacfb_defined.yres, | |
245 | imacfb_defined.bits_per_pixel, imacfb_fix.line_length, | |
246 | screen_info.pages); | |
247 | ||
248 | imacfb_defined.xres_virtual = imacfb_defined.xres; | |
249 | imacfb_defined.yres_virtual = imacfb_fix.smem_len / | |
250 | imacfb_fix.line_length; | |
251 | printk(KERN_INFO "imacfb: scrolling: redraw\n"); | |
252 | imacfb_defined.yres_virtual = imacfb_defined.yres; | |
253 | ||
254 | /* some dummy values for timing to make fbset happy */ | |
255 | imacfb_defined.pixclock = 10000000 / imacfb_defined.xres * | |
256 | 1000 / imacfb_defined.yres; | |
257 | imacfb_defined.left_margin = (imacfb_defined.xres / 8) & 0xf8; | |
258 | imacfb_defined.hsync_len = (imacfb_defined.xres / 8) & 0xf8; | |
259 | ||
260 | imacfb_defined.red.offset = screen_info.red_pos; | |
261 | imacfb_defined.red.length = screen_info.red_size; | |
262 | imacfb_defined.green.offset = screen_info.green_pos; | |
263 | imacfb_defined.green.length = screen_info.green_size; | |
264 | imacfb_defined.blue.offset = screen_info.blue_pos; | |
265 | imacfb_defined.blue.length = screen_info.blue_size; | |
266 | imacfb_defined.transp.offset = screen_info.rsvd_pos; | |
267 | imacfb_defined.transp.length = screen_info.rsvd_size; | |
268 | ||
269 | printk(KERN_INFO "imacfb: %s: " | |
270 | "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n", | |
271 | "Truecolor", | |
272 | screen_info.rsvd_size, | |
273 | screen_info.red_size, | |
274 | screen_info.green_size, | |
275 | screen_info.blue_size, | |
276 | screen_info.rsvd_pos, | |
277 | screen_info.red_pos, | |
278 | screen_info.green_pos, | |
279 | screen_info.blue_pos); | |
280 | ||
281 | imacfb_fix.ypanstep = 0; | |
282 | imacfb_fix.ywrapstep = 0; | |
283 | ||
284 | /* request failure does not faze us, as vgacon probably has this | |
285 | * region already (FIXME) */ | |
286 | request_region(0x3c0, 32, "imacfb"); | |
287 | ||
288 | info->fbops = &imacfb_ops; | |
289 | info->var = imacfb_defined; | |
290 | info->fix = imacfb_fix; | |
291 | info->flags = FBINFO_FLAG_DEFAULT; | |
292 | ||
293 | if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) { | |
294 | err = -ENOMEM; | |
295 | goto err_unmap; | |
296 | } | |
297 | if (register_framebuffer(info)<0) { | |
298 | err = -EINVAL; | |
299 | goto err_fb_dealoc; | |
300 | } | |
301 | printk(KERN_INFO "fb%d: %s frame buffer device\n", | |
302 | info->node, info->fix.id); | |
303 | return 0; | |
304 | ||
305 | err_fb_dealoc: | |
306 | fb_dealloc_cmap(&info->cmap); | |
307 | err_unmap: | |
308 | iounmap(info->screen_base); | |
309 | framebuffer_release(info); | |
310 | err_release_mem: | |
311 | release_mem_region(imacfb_fix.smem_start, size_total); | |
312 | return err; | |
313 | } | |
314 | ||
315 | static struct platform_driver imacfb_driver = { | |
316 | .probe = imacfb_probe, | |
317 | .driver = { | |
318 | .name = "imacfb", | |
319 | }, | |
320 | }; | |
321 | ||
322 | static struct platform_device imacfb_device = { | |
323 | .name = "imacfb", | |
324 | }; | |
325 | ||
326 | static int __init imacfb_init(void) | |
327 | { | |
328 | int ret; | |
329 | char *option = NULL; | |
330 | ||
331 | /* ignore error return of fb_get_options */ | |
332 | fb_get_options("imacfb", &option); | |
333 | imacfb_setup(option); | |
334 | ret = platform_driver_register(&imacfb_driver); | |
335 | ||
336 | if (!ret) { | |
337 | ret = platform_device_register(&imacfb_device); | |
338 | if (ret) | |
339 | platform_driver_unregister(&imacfb_driver); | |
340 | } | |
341 | return ret; | |
342 | } | |
343 | module_init(imacfb_init); | |
344 | ||
345 | MODULE_LICENSE("GPL"); |