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Edgar Hucek90b4f9a2006-06-26 00:26:59 -07001/*
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>
Jon Smirla8f340e2006-07-10 04:44:12 -070018#include <linux/screen_info.h>
Edgar Hucek90b4f9a2006-06-26 00:26:59 -070019#include <linux/slab.h>
20#include <linux/string.h>
Edgar Hucekb64ef8a2006-08-13 23:24:16 -070021#include <linux/dmi.h>
22#include <linux/efi.h>
Edgar Hucek90b4f9a2006-06-26 00:26:59 -070023
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,
Edgar Hucekb64ef8a2006-08-13 23:24:16 -070033 M_UNKNOWN
Edgar Hucek90b4f9a2006-06-26 00:26:59 -070034} 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;
Edgar Hucekb64ef8a2006-08-13 23:24:16 -070057static int model = M_UNKNOWN;
Edgar Hucek90b4f9a2006-06-26 00:26:59 -070058static int manual_height;
59static int manual_width;
60
Edgar Hucekb64ef8a2006-08-13 23:24:16 -070061static int set_system(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."),
Thomas Meyercb3e0fe2006-08-27 01:23:33 -070074 DMI_MATCH(DMI_PRODUCT_NAME,"iMac4,1") }, (void*)M_I17},
Edgar Hucekb64ef8a2006-08-13 23:24:16 -070075 { set_system, "MacBookPro1,1", {
76 DMI_MATCH(DMI_BIOS_VENDOR,"Apple Computer, Inc."),
Thomas Meyercb3e0fe2006-08-27 01:23:33 -070077 DMI_MATCH(DMI_PRODUCT_NAME,"MacBookPro1,1") }, (void*)M_I17},
Edgar Hucekb64ef8a2006-08-13 23:24:16 -070078 { 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
Edgar Hucek90b4f9a2006-06-26 00:26:59 -070087#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 * Set a single color register. The values supplied are
97 * already rounded down to the hardware's capabilities
98 * (according to the entries in the `var' structure). Return
99 * != 0 for invalid regno.
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;
Edgar Hucek90b4f9a2006-06-26 00:26:59 -0700180 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 /* if the user wants to manually specify height/width,
201 we will override the defaults */
202 /* TODO: eventually get auto-detection working */
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 /* size_vmode -- that is the amount of memory needed for the
215 * used video mode, i.e. the minimum amount of
216 * memory we need. */
217 size_vmode = imacfb_defined.yres * imacfb_fix.line_length;
218
219 /* size_total -- all video memory we have. Used for
220 * entries, ressource allocation and bounds
221 * checking. */
222 size_total = screen_info.lfb_size * 65536;
223 if (size_total < size_vmode)
224 size_total = size_vmode;
225
226 /* size_remap -- the amount of video memory we are going to
227 * use for imacfb. With modern cards it is no
228 * option to simply use size_total as that
229 * wastes plenty of kernel address space. */
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
Edgar Hucekb64ef8a2006-08-13 23:24:16 -0700237#ifndef __i386__
238 screen_info.imacpm_seg = 0;
239#endif
240
Edgar Hucek90b4f9a2006-06-26 00:26:59 -0700241 if (!request_mem_region(imacfb_fix.smem_start, size_total, "imacfb")) {
242 printk(KERN_WARNING
243 "imacfb: cannot reserve video memory at 0x%lx\n",
244 imacfb_fix.smem_start);
245 /* We cannot make this fatal. Sometimes this comes from magic
246 spaces our resource handlers simply don't know about */
247 }
248
249 info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
250 if (!info) {
251 err = -ENOMEM;
252 goto err_release_mem;
253 }
254 info->pseudo_palette = info->par;
255 info->par = NULL;
256
257 info->screen_base = ioremap(imacfb_fix.smem_start, imacfb_fix.smem_len);
258 if (!info->screen_base) {
259 printk(KERN_ERR "imacfb: abort, cannot ioremap video memory "
260 "0x%x @ 0x%lx\n",
261 imacfb_fix.smem_len, imacfb_fix.smem_start);
262 err = -EIO;
263 goto err_unmap;
264 }
265
266 printk(KERN_INFO "imacfb: framebuffer at 0x%lx, mapped to 0x%p, "
267 "using %dk, total %dk\n",
268 imacfb_fix.smem_start, info->screen_base,
269 size_remap/1024, size_total/1024);
270 printk(KERN_INFO "imacfb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
271 imacfb_defined.xres, imacfb_defined.yres,
272 imacfb_defined.bits_per_pixel, imacfb_fix.line_length,
273 screen_info.pages);
274
275 imacfb_defined.xres_virtual = imacfb_defined.xres;
276 imacfb_defined.yres_virtual = imacfb_fix.smem_len /
277 imacfb_fix.line_length;
278 printk(KERN_INFO "imacfb: scrolling: redraw\n");
279 imacfb_defined.yres_virtual = imacfb_defined.yres;
280
281 /* some dummy values for timing to make fbset happy */
282 imacfb_defined.pixclock = 10000000 / imacfb_defined.xres *
283 1000 / imacfb_defined.yres;
284 imacfb_defined.left_margin = (imacfb_defined.xres / 8) & 0xf8;
285 imacfb_defined.hsync_len = (imacfb_defined.xres / 8) & 0xf8;
286
287 imacfb_defined.red.offset = screen_info.red_pos;
288 imacfb_defined.red.length = screen_info.red_size;
289 imacfb_defined.green.offset = screen_info.green_pos;
290 imacfb_defined.green.length = screen_info.green_size;
291 imacfb_defined.blue.offset = screen_info.blue_pos;
292 imacfb_defined.blue.length = screen_info.blue_size;
293 imacfb_defined.transp.offset = screen_info.rsvd_pos;
294 imacfb_defined.transp.length = screen_info.rsvd_size;
295
296 printk(KERN_INFO "imacfb: %s: "
297 "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
298 "Truecolor",
299 screen_info.rsvd_size,
300 screen_info.red_size,
301 screen_info.green_size,
302 screen_info.blue_size,
303 screen_info.rsvd_pos,
304 screen_info.red_pos,
305 screen_info.green_pos,
306 screen_info.blue_pos);
307
308 imacfb_fix.ypanstep = 0;
309 imacfb_fix.ywrapstep = 0;
310
311 /* request failure does not faze us, as vgacon probably has this
312 * region already (FIXME) */
313 request_region(0x3c0, 32, "imacfb");
314
315 info->fbops = &imacfb_ops;
316 info->var = imacfb_defined;
317 info->fix = imacfb_fix;
318 info->flags = FBINFO_FLAG_DEFAULT;
319
320 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
321 err = -ENOMEM;
322 goto err_unmap;
323 }
324 if (register_framebuffer(info)<0) {
325 err = -EINVAL;
326 goto err_fb_dealoc;
327 }
328 printk(KERN_INFO "fb%d: %s frame buffer device\n",
329 info->node, info->fix.id);
330 return 0;
331
332err_fb_dealoc:
333 fb_dealloc_cmap(&info->cmap);
334err_unmap:
335 iounmap(info->screen_base);
336 framebuffer_release(info);
337err_release_mem:
338 release_mem_region(imacfb_fix.smem_start, size_total);
339 return err;
340}
341
342static struct platform_driver imacfb_driver = {
343 .probe = imacfb_probe,
344 .driver = {
345 .name = "imacfb",
346 },
347};
348
349static struct platform_device imacfb_device = {
350 .name = "imacfb",
351};
352
353static int __init imacfb_init(void)
354{
355 int ret;
356 char *option = NULL;
357
Edgar Hucekb64ef8a2006-08-13 23:24:16 -0700358 if (!efi_enabled)
359 return -ENODEV;
360 if (!dmi_check_system(dmi_system_table))
361 return -ENODEV;
362 if (model == M_UNKNOWN)
363 return -ENODEV;
364
365 if (fb_get_options("imacfb", &option))
366 return -ENODEV;
367
Edgar Hucek90b4f9a2006-06-26 00:26:59 -0700368 imacfb_setup(option);
369 ret = platform_driver_register(&imacfb_driver);
370
371 if (!ret) {
372 ret = platform_device_register(&imacfb_device);
373 if (ret)
374 platform_driver_unregister(&imacfb_driver);
375 }
376 return ret;
377}
378module_init(imacfb_init);
379
380MODULE_LICENSE("GPL");