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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/screen_info.h>
19#include <linux/slab.h>
20#include <linux/string.h>
21#include <linux/dmi.h>
22#include <linux/efi.h>
23
24#include <asm/io.h>
25
26#include <video/vga.h>
27
28typedef enum _MAC_TYPE {
29 M_I17,
30 M_I20,
31 M_MINI,
32 M_MACBOOK,
33 M_UNKNOWN
34} MAC_TYPE;
35
36
37
38static struct fb_var_screeninfo imacfb_defined __initdata = {
39 .activate = FB_ACTIVATE_NOW,
40 .height = -1,
41 .width = -1,
42 .right_margin = 32,
43 .upper_margin = 16,
44 .lower_margin = 4,
45 .vsync_len = 4,
46 .vmode = FB_VMODE_NONINTERLACED,
47};
48
49static struct fb_fix_screeninfo imacfb_fix __initdata = {
50 .id = "IMAC VGA",
51 .type = FB_TYPE_PACKED_PIXELS,
52 .accel = FB_ACCEL_NONE,
53 .visual = FB_VISUAL_TRUECOLOR,
54};
55
56static int inverse;
57static int model = M_UNKNOWN;
58static int manual_height;
59static int manual_width;
60
61static int set_system(const struct dmi_system_id *id)
62{
63 printk(KERN_INFO "imacfb: %s detected - set system to %ld\n",
64 id->ident, (long)id->driver_data);
65
66 model = (long)id->driver_data;
67
68 return 0;
69}
70
71static struct dmi_system_id __initdata dmi_system_table[] = {
72 { set_system, "iMac4,1", {
73 DMI_MATCH(DMI_BIOS_VENDOR,"Apple Computer, Inc."),
74 DMI_MATCH(DMI_PRODUCT_NAME,"iMac4,1") }, (void*)M_I17},
75 { set_system, "MacBookPro1,1", {
76 DMI_MATCH(DMI_BIOS_VENDOR,"Apple Computer, Inc."),
77 DMI_MATCH(DMI_PRODUCT_NAME,"MacBookPro1,1") }, (void*)M_I17},
78 { set_system, "MacBook1,1", {
79 DMI_MATCH(DMI_BIOS_VENDOR,"Apple Computer, Inc."),
80 DMI_MATCH(DMI_PRODUCT_NAME,"MacBook1,1")}, (void *)M_MACBOOK},
81 { set_system, "Macmini1,1", {
82 DMI_MATCH(DMI_BIOS_VENDOR,"Apple Computer, Inc."),
83 DMI_MATCH(DMI_PRODUCT_NAME,"Macmini1,1")}, (void *)M_MINI},
84 {},
85};
86
87#define DEFAULT_FB_MEM 1024*1024*16
88
89
90
91static int imacfb_setcolreg(unsigned regno, unsigned red, unsigned green,
92 unsigned blue, unsigned transp,
93 struct fb_info *info)
94{
95
96
97
98
99
100
101
102 if (regno >= info->cmap.len)
103 return 1;
104
105 if (regno < 16) {
106 red >>= 8;
107 green >>= 8;
108 blue >>= 8;
109 ((u32 *)(info->pseudo_palette))[regno] =
110 (red << info->var.red.offset) |
111 (green << info->var.green.offset) |
112 (blue << info->var.blue.offset);
113 }
114 return 0;
115}
116
117static struct fb_ops imacfb_ops = {
118 .owner = THIS_MODULE,
119 .fb_setcolreg = imacfb_setcolreg,
120 .fb_fillrect = cfb_fillrect,
121 .fb_copyarea = cfb_copyarea,
122 .fb_imageblit = cfb_imageblit,
123};
124
125static int __init imacfb_setup(char *options)
126{
127 char *this_opt;
128
129 if (!options || !*options)
130 return 0;
131
132 while ((this_opt = strsep(&options, ",")) != NULL) {
133 if (!*this_opt) continue;
134
135 if (!strcmp(this_opt, "inverse"))
136 inverse = 1;
137 else if (!strcmp(this_opt, "i17"))
138 model = M_I17;
139 else if (!strcmp(this_opt, "i20"))
140 model = M_I20;
141 else if (!strcmp(this_opt, "mini"))
142 model = M_MINI;
143 else if (!strcmp(this_opt, "macbook"))
144 model = M_MACBOOK;
145 else if (!strncmp(this_opt, "height:", 7))
146 manual_height = simple_strtoul(this_opt+7, NULL, 0);
147 else if (!strncmp(this_opt, "width:", 6))
148 manual_width = simple_strtoul(this_opt+6, NULL, 0);
149 }
150 return 0;
151}
152
153static int __init imacfb_probe(struct platform_device *dev)
154{
155 struct fb_info *info;
156 int err;
157 unsigned int size_vmode;
158 unsigned int size_remap;
159 unsigned int size_total;
160
161 screen_info.lfb_depth = 32;
162 screen_info.lfb_size = DEFAULT_FB_MEM / 0x10000;
163 screen_info.pages=1;
164 screen_info.blue_size = 8;
165 screen_info.blue_pos = 0;
166 screen_info.green_size = 8;
167 screen_info.green_pos = 8;
168 screen_info.red_size = 8;
169 screen_info.red_pos = 16;
170 screen_info.rsvd_size = 8;
171 screen_info.rsvd_pos = 24;
172
173 switch (model) {
174 case M_I17:
175 screen_info.lfb_width = 1440;
176 screen_info.lfb_height = 900;
177 screen_info.lfb_linelength = 1472 * 4;
178 screen_info.lfb_base = 0x80010000;
179 break;
180 case M_I20:
181 screen_info.lfb_width = 1680;
182 screen_info.lfb_height = 1050;
183 screen_info.lfb_linelength = 1728 * 4;
184 screen_info.lfb_base = 0x80010000;
185 break;
186 case M_MINI:
187 screen_info.lfb_width = 1024;
188 screen_info.lfb_height = 768;
189 screen_info.lfb_linelength = 2048 * 4;
190 screen_info.lfb_base = 0x80000000;
191 break;
192 case M_MACBOOK:
193 screen_info.lfb_width = 1280;
194 screen_info.lfb_height = 800;
195 screen_info.lfb_linelength = 2048 * 4;
196 screen_info.lfb_base = 0x80000000;
197 break;
198 }
199
200
201
202
203 if (manual_height > 0)
204 screen_info.lfb_height = manual_height;
205 if (manual_width > 0)
206 screen_info.lfb_width = manual_width;
207
208 imacfb_fix.smem_start = screen_info.lfb_base;
209 imacfb_defined.bits_per_pixel = screen_info.lfb_depth;
210 imacfb_defined.xres = screen_info.lfb_width;
211 imacfb_defined.yres = screen_info.lfb_height;
212 imacfb_fix.line_length = screen_info.lfb_linelength;
213
214
215
216
217 size_vmode = imacfb_defined.yres * imacfb_fix.line_length;
218
219
220
221
222 size_total = screen_info.lfb_size * 65536;
223 if (size_total < size_vmode)
224 size_total = size_vmode;
225
226
227
228
229
230 size_remap = size_vmode * 2;
231 if (size_remap < size_vmode)
232 size_remap = size_vmode;
233 if (size_remap > size_total)
234 size_remap = size_total;
235 imacfb_fix.smem_len = size_remap;
236
237 if (!request_mem_region(imacfb_fix.smem_start, size_total, "imacfb")) {
238 printk(KERN_WARNING
239 "imacfb: cannot reserve video memory at 0x%lx\n",
240 imacfb_fix.smem_start);
241
242
243 }
244
245 info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
246 if (!info) {
247 err = -ENOMEM;
248 goto err_release_mem;
249 }
250 info->pseudo_palette = info->par;
251 info->par = NULL;
252
253 info->screen_base = ioremap(imacfb_fix.smem_start, imacfb_fix.smem_len);
254 if (!info->screen_base) {
255 printk(KERN_ERR "imacfb: abort, cannot ioremap video memory "
256 "0x%x @ 0x%lx\n",
257 imacfb_fix.smem_len, imacfb_fix.smem_start);
258 err = -EIO;
259 goto err_unmap;
260 }
261
262 printk(KERN_INFO "imacfb: framebuffer at 0x%lx, mapped to 0x%p, "
263 "using %dk, total %dk\n",
264 imacfb_fix.smem_start, info->screen_base,
265 size_remap/1024, size_total/1024);
266 printk(KERN_INFO "imacfb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
267 imacfb_defined.xres, imacfb_defined.yres,
268 imacfb_defined.bits_per_pixel, imacfb_fix.line_length,
269 screen_info.pages);
270
271 imacfb_defined.xres_virtual = imacfb_defined.xres;
272 imacfb_defined.yres_virtual = imacfb_fix.smem_len /
273 imacfb_fix.line_length;
274 printk(KERN_INFO "imacfb: scrolling: redraw\n");
275 imacfb_defined.yres_virtual = imacfb_defined.yres;
276
277
278 imacfb_defined.pixclock = 10000000 / imacfb_defined.xres *
279 1000 / imacfb_defined.yres;
280 imacfb_defined.left_margin = (imacfb_defined.xres / 8) & 0xf8;
281 imacfb_defined.hsync_len = (imacfb_defined.xres / 8) & 0xf8;
282
283 imacfb_defined.red.offset = screen_info.red_pos;
284 imacfb_defined.red.length = screen_info.red_size;
285 imacfb_defined.green.offset = screen_info.green_pos;
286 imacfb_defined.green.length = screen_info.green_size;
287 imacfb_defined.blue.offset = screen_info.blue_pos;
288 imacfb_defined.blue.length = screen_info.blue_size;
289 imacfb_defined.transp.offset = screen_info.rsvd_pos;
290 imacfb_defined.transp.length = screen_info.rsvd_size;
291
292 printk(KERN_INFO "imacfb: %s: "
293 "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
294 "Truecolor",
295 screen_info.rsvd_size,
296 screen_info.red_size,
297 screen_info.green_size,
298 screen_info.blue_size,
299 screen_info.rsvd_pos,
300 screen_info.red_pos,
301 screen_info.green_pos,
302 screen_info.blue_pos);
303
304 imacfb_fix.ypanstep = 0;
305 imacfb_fix.ywrapstep = 0;
306
307
308
309 request_region(0x3c0, 32, "imacfb");
310
311 info->fbops = &imacfb_ops;
312 info->var = imacfb_defined;
313 info->fix = imacfb_fix;
314 info->flags = FBINFO_FLAG_DEFAULT;
315
316 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
317 err = -ENOMEM;
318 goto err_unmap;
319 }
320 if (register_framebuffer(info)<0) {
321 err = -EINVAL;
322 goto err_fb_dealoc;
323 }
324 printk(KERN_INFO "fb%d: %s frame buffer device\n",
325 info->node, info->fix.id);
326 return 0;
327
328err_fb_dealoc:
329 fb_dealloc_cmap(&info->cmap);
330err_unmap:
331 iounmap(info->screen_base);
332 framebuffer_release(info);
333err_release_mem:
334 release_mem_region(imacfb_fix.smem_start, size_total);
335 return err;
336}
337
338static struct platform_driver imacfb_driver = {
339 .probe = imacfb_probe,
340 .driver = {
341 .name = "imacfb",
342 },
343};
344
345static struct platform_device imacfb_device = {
346 .name = "imacfb",
347};
348
349static int __init imacfb_init(void)
350{
351 int ret;
352 char *option = NULL;
353
354 if (!efi_enabled)
355 return -ENODEV;
356 if (!dmi_check_system(dmi_system_table))
357 return -ENODEV;
358 if (model == M_UNKNOWN)
359 return -ENODEV;
360
361 if (fb_get_options("imacfb", &option))
362 return -ENODEV;
363
364 imacfb_setup(option);
365 ret = platform_driver_register(&imacfb_driver);
366
367 if (!ret) {
368 ret = platform_device_register(&imacfb_device);
369 if (ret)
370 platform_driver_unregister(&imacfb_driver);
371 }
372 return ret;
373}
374module_init(imacfb_init);
375
376MODULE_LICENSE("GPL");
377
