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1da177e4 LT |
1 | /* |
2 | * platinumfb.c -- frame buffer device for the PowerMac 'platinum' display | |
3 | * | |
4 | * Copyright (C) 1998 Franz Sirl | |
5 | * | |
6 | * Frame buffer structure from: | |
7 | * drivers/video/controlfb.c -- frame buffer device for | |
8 | * Apple 'control' display chip. | |
9 | * Copyright (C) 1998 Dan Jacobowitz | |
10 | * | |
11 | * Hardware information from: | |
12 | * platinum.c: Console support for PowerMac "platinum" display adaptor. | |
13 | * Copyright (C) 1996 Paul Mackerras and Mark Abene | |
14 | * | |
15 | * This file is subject to the terms and conditions of the GNU General Public | |
16 | * License. See the file COPYING in the main directory of this archive for | |
17 | * more details. | |
18 | */ | |
19 | ||
20 | #include <linux/config.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/errno.h> | |
24 | #include <linux/string.h> | |
25 | #include <linux/mm.h> | |
26 | #include <linux/tty.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/vmalloc.h> | |
29 | #include <linux/delay.h> | |
30 | #include <linux/interrupt.h> | |
31 | #include <linux/fb.h> | |
32 | #include <linux/init.h> | |
33 | #include <linux/pci.h> | |
34 | #include <linux/nvram.h> | |
35 | #include <asm/io.h> | |
36 | #include <asm/prom.h> | |
37 | #include <asm/pgtable.h> | |
38 | #include <asm/of_device.h> | |
39 | ||
40 | #include "macmodes.h" | |
41 | #include "platinumfb.h" | |
42 | ||
43 | static int default_vmode = VMODE_NVRAM; | |
44 | static int default_cmode = CMODE_NVRAM; | |
45 | ||
46 | struct fb_info_platinum { | |
47 | struct fb_info *info; | |
48 | ||
49 | int vmode, cmode; | |
50 | int xres, yres; | |
51 | int vxres, vyres; | |
52 | int xoffset, yoffset; | |
53 | ||
54 | struct { | |
55 | __u8 red, green, blue; | |
56 | } palette[256]; | |
57 | u32 pseudo_palette[17]; | |
58 | ||
59 | volatile struct cmap_regs __iomem *cmap_regs; | |
60 | unsigned long cmap_regs_phys; | |
61 | ||
62 | volatile struct platinum_regs __iomem *platinum_regs; | |
63 | unsigned long platinum_regs_phys; | |
64 | ||
65 | __u8 __iomem *frame_buffer; | |
66 | volatile __u8 __iomem *base_frame_buffer; | |
67 | unsigned long frame_buffer_phys; | |
68 | ||
69 | unsigned long total_vram; | |
70 | int clktype; | |
71 | int dactype; | |
72 | }; | |
73 | ||
74 | /* | |
75 | * Frame buffer device API | |
76 | */ | |
77 | ||
78 | static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, | |
79 | u_int transp, struct fb_info *info); | |
80 | static int platinumfb_blank(int blank_mode, struct fb_info *info); | |
81 | static int platinumfb_set_par (struct fb_info *info); | |
82 | static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info); | |
83 | ||
84 | /* | |
85 | * internal functions | |
86 | */ | |
87 | ||
88 | static inline int platinum_vram_reqd(int video_mode, int color_mode); | |
89 | static int read_platinum_sense(struct fb_info_platinum *pinfo); | |
90 | static void set_platinum_clock(struct fb_info_platinum *pinfo); | |
91 | static void platinum_set_hardware(struct fb_info_platinum *pinfo); | |
92 | static int platinum_var_to_par(struct fb_var_screeninfo *var, | |
93 | struct fb_info_platinum *pinfo, | |
94 | int check_only); | |
95 | ||
96 | /* | |
97 | * Interface used by the world | |
98 | */ | |
99 | ||
100 | int platinumfb_init(void); | |
101 | int platinumfb_setup(char*); | |
102 | ||
103 | static struct fb_ops platinumfb_ops = { | |
104 | .owner = THIS_MODULE, | |
105 | .fb_check_var = platinumfb_check_var, | |
106 | .fb_set_par = platinumfb_set_par, | |
107 | .fb_setcolreg = platinumfb_setcolreg, | |
108 | .fb_blank = platinumfb_blank, | |
109 | .fb_fillrect = cfb_fillrect, | |
110 | .fb_copyarea = cfb_copyarea, | |
111 | .fb_imageblit = cfb_imageblit, | |
1da177e4 LT |
112 | }; |
113 | ||
114 | /* | |
115 | * Checks a var structure | |
116 | */ | |
117 | static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info) | |
118 | { | |
119 | return platinum_var_to_par(var, info->par, 1); | |
120 | } | |
121 | ||
122 | /* | |
123 | * Applies current var to display | |
124 | */ | |
125 | static int platinumfb_set_par (struct fb_info *info) | |
126 | { | |
127 | struct fb_info_platinum *pinfo = info->par; | |
128 | struct platinum_regvals *init; | |
129 | int err, offset = 0x20; | |
130 | ||
131 | if((err = platinum_var_to_par(&info->var, pinfo, 0))) { | |
132 | printk (KERN_ERR "platinumfb_set_par: error calling" | |
133 | " platinum_var_to_par: %d.\n", err); | |
134 | return err; | |
135 | } | |
136 | ||
137 | platinum_set_hardware(pinfo); | |
138 | ||
139 | init = platinum_reg_init[pinfo->vmode-1]; | |
140 | ||
9cf84d7c BH |
141 | if ((pinfo->vmode == VMODE_832_624_75) && (pinfo->cmode > CMODE_8)) |
142 | offset = 0x10; | |
143 | ||
1da177e4 LT |
144 | info->screen_base = pinfo->frame_buffer + init->fb_offset + offset; |
145 | info->fix.smem_start = (pinfo->frame_buffer_phys) + init->fb_offset + offset; | |
146 | info->fix.visual = (pinfo->cmode == CMODE_8) ? | |
147 | FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR; | |
9cf84d7c BH |
148 | info->fix.line_length = vmode_attrs[pinfo->vmode-1].hres * (1<<pinfo->cmode) |
149 | + offset; | |
1da177e4 LT |
150 | printk("line_length: %x\n", info->fix.line_length); |
151 | return 0; | |
152 | } | |
153 | ||
154 | static int platinumfb_blank(int blank, struct fb_info *fb) | |
155 | { | |
156 | /* | |
157 | * Blank the screen if blank_mode != 0, else unblank. If blank == NULL | |
158 | * then the caller blanks by setting the CLUT (Color Look Up Table) to all | |
159 | * black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due | |
160 | * to e.g. a video mode which doesn't support it. Implements VESA suspend | |
161 | * and powerdown modes on hardware that supports disabling hsync/vsync: | |
162 | * blank_mode == 2: suspend vsync | |
163 | * blank_mode == 3: suspend hsync | |
164 | * blank_mode == 4: powerdown | |
165 | */ | |
166 | /* [danj] I think there's something fishy about those constants... */ | |
167 | /* | |
168 | struct fb_info_platinum *info = (struct fb_info_platinum *) fb; | |
169 | int ctrl; | |
170 | ||
171 | ctrl = ld_le32(&info->platinum_regs->ctrl.r) | 0x33; | |
172 | if (blank) | |
173 | --blank_mode; | |
174 | if (blank & VESA_VSYNC_SUSPEND) | |
175 | ctrl &= ~3; | |
176 | if (blank & VESA_HSYNC_SUSPEND) | |
177 | ctrl &= ~0x30; | |
178 | out_le32(&info->platinum_regs->ctrl.r, ctrl); | |
179 | */ | |
180 | /* TODO: Figure out how the heck to powerdown this thing! */ | |
181 | return 0; | |
182 | } | |
183 | ||
184 | static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, | |
185 | u_int transp, struct fb_info *info) | |
186 | { | |
187 | struct fb_info_platinum *pinfo = info->par; | |
188 | volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs; | |
189 | ||
190 | if (regno > 255) | |
191 | return 1; | |
192 | ||
193 | red >>= 8; | |
194 | green >>= 8; | |
195 | blue >>= 8; | |
196 | ||
197 | pinfo->palette[regno].red = red; | |
198 | pinfo->palette[regno].green = green; | |
199 | pinfo->palette[regno].blue = blue; | |
200 | ||
201 | out_8(&cmap_regs->addr, regno); /* tell clut what addr to fill */ | |
202 | out_8(&cmap_regs->lut, red); /* send one color channel at */ | |
203 | out_8(&cmap_regs->lut, green); /* a time... */ | |
204 | out_8(&cmap_regs->lut, blue); | |
205 | ||
206 | if (regno < 16) { | |
207 | int i; | |
208 | u32 *pal = info->pseudo_palette; | |
209 | switch (pinfo->cmode) { | |
210 | case CMODE_16: | |
211 | pal[regno] = (regno << 10) | (regno << 5) | regno; | |
212 | break; | |
213 | case CMODE_32: | |
214 | i = (regno << 8) | regno; | |
215 | pal[regno] = (i << 16) | i; | |
216 | break; | |
217 | } | |
218 | } | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
223 | static inline int platinum_vram_reqd(int video_mode, int color_mode) | |
224 | { | |
225 | return vmode_attrs[video_mode-1].vres * | |
9cf84d7c BH |
226 | (vmode_attrs[video_mode-1].hres * (1<<color_mode) + |
227 | ((video_mode == VMODE_832_624_75) && | |
228 | (color_mode > CMODE_8)) ? 0x10 : 0x20) + 0x1000; | |
1da177e4 LT |
229 | } |
230 | ||
231 | #define STORE_D2(a, d) { \ | |
232 | out_8(&cmap_regs->addr, (a+32)); \ | |
233 | out_8(&cmap_regs->d2, (d)); \ | |
234 | } | |
235 | ||
236 | static void set_platinum_clock(struct fb_info_platinum *pinfo) | |
237 | { | |
238 | volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs; | |
239 | struct platinum_regvals *init; | |
240 | ||
241 | init = platinum_reg_init[pinfo->vmode-1]; | |
242 | ||
243 | STORE_D2(6, 0xc6); | |
244 | out_8(&cmap_regs->addr,3+32); | |
245 | ||
246 | if (in_8(&cmap_regs->d2) == 2) { | |
247 | STORE_D2(7, init->clock_params[pinfo->clktype][0]); | |
248 | STORE_D2(8, init->clock_params[pinfo->clktype][1]); | |
249 | STORE_D2(3, 3); | |
250 | } else { | |
251 | STORE_D2(4, init->clock_params[pinfo->clktype][0]); | |
252 | STORE_D2(5, init->clock_params[pinfo->clktype][1]); | |
253 | STORE_D2(3, 2); | |
254 | } | |
255 | ||
256 | __delay(5000); | |
257 | STORE_D2(9, 0xa6); | |
258 | } | |
259 | ||
260 | ||
261 | /* Now how about actually saying, Make it so! */ | |
262 | /* Some things in here probably don't need to be done each time. */ | |
263 | static void platinum_set_hardware(struct fb_info_platinum *pinfo) | |
264 | { | |
265 | volatile struct platinum_regs __iomem *platinum_regs = pinfo->platinum_regs; | |
266 | volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs; | |
267 | struct platinum_regvals *init; | |
268 | int i; | |
269 | int vmode, cmode; | |
270 | ||
271 | vmode = pinfo->vmode; | |
272 | cmode = pinfo->cmode; | |
273 | ||
274 | init = platinum_reg_init[vmode - 1]; | |
275 | ||
276 | /* Initialize display timing registers */ | |
277 | out_be32(&platinum_regs->reg[24].r, 7); /* turn display off */ | |
278 | ||
279 | for (i = 0; i < 26; ++i) | |
280 | out_be32(&platinum_regs->reg[i+32].r, init->regs[i]); | |
281 | ||
282 | out_be32(&platinum_regs->reg[26+32].r, (pinfo->total_vram == 0x100000 ? | |
283 | init->offset[cmode] + 4 - cmode : | |
284 | init->offset[cmode])); | |
285 | out_be32(&platinum_regs->reg[16].r, (unsigned) pinfo->frame_buffer_phys+init->fb_offset+0x10); | |
286 | out_be32(&platinum_regs->reg[18].r, init->pitch[cmode]); | |
287 | out_be32(&platinum_regs->reg[19].r, (pinfo->total_vram == 0x100000 ? | |
288 | init->mode[cmode+1] : | |
289 | init->mode[cmode])); | |
290 | out_be32(&platinum_regs->reg[20].r, (pinfo->total_vram == 0x100000 ? 0x11 : 0x1011)); | |
291 | out_be32(&platinum_regs->reg[21].r, 0x100); | |
292 | out_be32(&platinum_regs->reg[22].r, 1); | |
293 | out_be32(&platinum_regs->reg[23].r, 1); | |
294 | out_be32(&platinum_regs->reg[26].r, 0xc00); | |
295 | out_be32(&platinum_regs->reg[27].r, 0x235); | |
296 | /* out_be32(&platinum_regs->reg[27].r, 0x2aa); */ | |
297 | ||
298 | STORE_D2(0, (pinfo->total_vram == 0x100000 ? | |
299 | init->dacula_ctrl[cmode] & 0xf : | |
300 | init->dacula_ctrl[cmode])); | |
301 | STORE_D2(1, 4); | |
302 | STORE_D2(2, 0); | |
303 | ||
304 | set_platinum_clock(pinfo); | |
305 | ||
306 | out_be32(&platinum_regs->reg[24].r, 0); /* turn display on */ | |
307 | } | |
308 | ||
309 | /* | |
310 | * Set misc info vars for this driver | |
311 | */ | |
312 | static void __devinit platinum_init_info(struct fb_info *info, struct fb_info_platinum *pinfo) | |
313 | { | |
314 | /* Fill fb_info */ | |
315 | info->fbops = &platinumfb_ops; | |
316 | info->pseudo_palette = pinfo->pseudo_palette; | |
317 | info->flags = FBINFO_DEFAULT; | |
318 | info->screen_base = pinfo->frame_buffer + 0x20; | |
319 | ||
320 | fb_alloc_cmap(&info->cmap, 256, 0); | |
321 | ||
322 | /* Fill fix common fields */ | |
323 | strcpy(info->fix.id, "platinum"); | |
324 | info->fix.mmio_start = pinfo->platinum_regs_phys; | |
325 | info->fix.mmio_len = 0x1000; | |
326 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
327 | info->fix.smem_start = pinfo->frame_buffer_phys + 0x20; /* will be updated later */ | |
328 | info->fix.smem_len = pinfo->total_vram - 0x20; | |
329 | info->fix.ywrapstep = 0; | |
330 | info->fix.xpanstep = 0; | |
331 | info->fix.ypanstep = 0; | |
332 | info->fix.type_aux = 0; | |
333 | info->fix.accel = FB_ACCEL_NONE; | |
334 | } | |
335 | ||
336 | ||
337 | static int __devinit platinum_init_fb(struct fb_info *info) | |
338 | { | |
339 | struct fb_info_platinum *pinfo = info->par; | |
340 | struct fb_var_screeninfo var; | |
341 | int sense, rc; | |
342 | ||
343 | sense = read_platinum_sense(pinfo); | |
344 | printk(KERN_INFO "platinumfb: Monitor sense value = 0x%x, ", sense); | |
345 | ||
346 | if (default_vmode == VMODE_NVRAM) { | |
347 | default_vmode = nvram_read_byte(NV_VMODE); | |
348 | if (default_vmode <= 0 || default_vmode > VMODE_MAX || | |
349 | !platinum_reg_init[default_vmode-1]) | |
350 | default_vmode = VMODE_CHOOSE; | |
351 | } | |
352 | if (default_vmode == VMODE_CHOOSE) { | |
353 | default_vmode = mac_map_monitor_sense(sense); | |
354 | } | |
355 | if (default_vmode <= 0 || default_vmode > VMODE_MAX) | |
356 | default_vmode = VMODE_640_480_60; | |
357 | if (default_cmode == CMODE_NVRAM) | |
358 | default_cmode = nvram_read_byte(NV_CMODE); | |
359 | if (default_cmode < CMODE_8 || default_cmode > CMODE_32) | |
360 | default_cmode = CMODE_8; | |
361 | /* | |
362 | * Reduce the pixel size if we don't have enough VRAM. | |
363 | */ | |
364 | while(default_cmode > CMODE_8 && | |
365 | platinum_vram_reqd(default_vmode, default_cmode) > pinfo->total_vram) | |
366 | default_cmode--; | |
367 | ||
368 | printk("platinumfb: Using video mode %d and color mode %d.\n", default_vmode, default_cmode); | |
369 | ||
370 | /* Setup default var */ | |
371 | if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) { | |
372 | /* This shouldn't happen! */ | |
373 | printk("mac_vmode_to_var(%d, %d,) failed\n", default_vmode, default_cmode); | |
374 | try_again: | |
375 | default_vmode = VMODE_640_480_60; | |
376 | default_cmode = CMODE_8; | |
377 | if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) { | |
378 | printk(KERN_ERR "platinumfb: mac_vmode_to_var() failed\n"); | |
379 | return -ENXIO; | |
380 | } | |
381 | } | |
382 | ||
383 | /* Initialize info structure */ | |
384 | platinum_init_info(info, pinfo); | |
385 | ||
386 | /* Apply default var */ | |
387 | info->var = var; | |
388 | var.activate = FB_ACTIVATE_NOW; | |
389 | rc = fb_set_var(info, &var); | |
390 | if (rc && (default_vmode != VMODE_640_480_60 || default_cmode != CMODE_8)) | |
391 | goto try_again; | |
392 | ||
393 | /* Register with fbdev layer */ | |
394 | rc = register_framebuffer(info); | |
395 | if (rc < 0) | |
396 | return rc; | |
397 | ||
398 | printk(KERN_INFO "fb%d: Apple Platinum frame buffer device\n", info->node); | |
399 | ||
400 | return 0; | |
401 | } | |
402 | ||
403 | /* | |
404 | * Get the monitor sense value. | |
405 | * Note that this can be called before calibrate_delay, | |
406 | * so we can't use udelay. | |
407 | */ | |
408 | static int read_platinum_sense(struct fb_info_platinum *info) | |
409 | { | |
410 | volatile struct platinum_regs __iomem *platinum_regs = info->platinum_regs; | |
411 | int sense; | |
412 | ||
413 | out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */ | |
414 | __delay(2000); | |
415 | sense = (~in_be32(&platinum_regs->reg[23].r) & 7) << 8; | |
416 | ||
417 | /* drive each sense line low in turn and collect the other 2 */ | |
418 | out_be32(&platinum_regs->reg[23].r, 3); /* drive A low */ | |
419 | __delay(2000); | |
420 | sense |= (~in_be32(&platinum_regs->reg[23].r) & 3) << 4; | |
421 | out_be32(&platinum_regs->reg[23].r, 5); /* drive B low */ | |
422 | __delay(2000); | |
423 | sense |= (~in_be32(&platinum_regs->reg[23].r) & 4) << 1; | |
424 | sense |= (~in_be32(&platinum_regs->reg[23].r) & 1) << 2; | |
425 | out_be32(&platinum_regs->reg[23].r, 6); /* drive C low */ | |
426 | __delay(2000); | |
427 | sense |= (~in_be32(&platinum_regs->reg[23].r) & 6) >> 1; | |
428 | ||
429 | out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */ | |
430 | ||
431 | return sense; | |
432 | } | |
433 | ||
434 | /* | |
435 | * This routine takes a user-supplied var, and picks the best vmode/cmode from it. | |
436 | * It also updates the var structure to the actual mode data obtained | |
437 | */ | |
438 | static int platinum_var_to_par(struct fb_var_screeninfo *var, | |
439 | struct fb_info_platinum *pinfo, | |
440 | int check_only) | |
441 | { | |
442 | int vmode, cmode; | |
443 | ||
444 | if (mac_var_to_vmode(var, &vmode, &cmode) != 0) { | |
445 | printk(KERN_ERR "platinum_var_to_par: mac_var_to_vmode unsuccessful.\n"); | |
446 | printk(KERN_ERR "platinum_var_to_par: var->xres = %d\n", var->xres); | |
447 | printk(KERN_ERR "platinum_var_to_par: var->yres = %d\n", var->yres); | |
448 | printk(KERN_ERR "platinum_var_to_par: var->xres_virtual = %d\n", var->xres_virtual); | |
449 | printk(KERN_ERR "platinum_var_to_par: var->yres_virtual = %d\n", var->yres_virtual); | |
450 | printk(KERN_ERR "platinum_var_to_par: var->bits_per_pixel = %d\n", var->bits_per_pixel); | |
451 | printk(KERN_ERR "platinum_var_to_par: var->pixclock = %d\n", var->pixclock); | |
452 | printk(KERN_ERR "platinum_var_to_par: var->vmode = %d\n", var->vmode); | |
453 | return -EINVAL; | |
454 | } | |
455 | ||
456 | if (!platinum_reg_init[vmode-1]) { | |
457 | printk(KERN_ERR "platinum_var_to_par, vmode %d not valid.\n", vmode); | |
458 | return -EINVAL; | |
459 | } | |
460 | ||
461 | if (platinum_vram_reqd(vmode, cmode) > pinfo->total_vram) { | |
462 | printk(KERN_ERR "platinum_var_to_par, not enough ram for vmode %d, cmode %d.\n", vmode, cmode); | |
463 | return -EINVAL; | |
464 | } | |
465 | ||
466 | if (mac_vmode_to_var(vmode, cmode, var)) | |
467 | return -EINVAL; | |
468 | ||
469 | if (check_only) | |
470 | return 0; | |
471 | ||
472 | pinfo->vmode = vmode; | |
473 | pinfo->cmode = cmode; | |
474 | pinfo->xres = vmode_attrs[vmode-1].hres; | |
475 | pinfo->yres = vmode_attrs[vmode-1].vres; | |
476 | pinfo->xoffset = 0; | |
477 | pinfo->yoffset = 0; | |
478 | pinfo->vxres = pinfo->xres; | |
479 | pinfo->vyres = pinfo->yres; | |
480 | ||
481 | return 0; | |
482 | } | |
483 | ||
484 | ||
485 | /* | |
486 | * Parse user speficied options (`video=platinumfb:') | |
487 | */ | |
488 | int __init platinumfb_setup(char *options) | |
489 | { | |
490 | char *this_opt; | |
491 | ||
492 | if (!options || !*options) | |
493 | return 0; | |
494 | ||
495 | while ((this_opt = strsep(&options, ",")) != NULL) { | |
496 | if (!strncmp(this_opt, "vmode:", 6)) { | |
497 | int vmode = simple_strtoul(this_opt+6, NULL, 0); | |
498 | if (vmode > 0 && vmode <= VMODE_MAX) | |
499 | default_vmode = vmode; | |
500 | } else if (!strncmp(this_opt, "cmode:", 6)) { | |
501 | int depth = simple_strtoul(this_opt+6, NULL, 0); | |
502 | switch (depth) { | |
503 | case 0: | |
504 | case 8: | |
505 | default_cmode = CMODE_8; | |
506 | break; | |
507 | case 15: | |
508 | case 16: | |
509 | default_cmode = CMODE_16; | |
510 | break; | |
511 | case 24: | |
512 | case 32: | |
513 | default_cmode = CMODE_32; | |
514 | break; | |
515 | } | |
516 | } | |
517 | } | |
518 | return 0; | |
519 | } | |
520 | ||
521 | #ifdef __powerpc__ | |
522 | #define invalidate_cache(addr) \ | |
523 | asm volatile("eieio; dcbf 0,%1" \ | |
524 | : "=m" (*(addr)) : "r" (addr) : "memory"); | |
525 | #else | |
526 | #define invalidate_cache(addr) | |
527 | #endif | |
528 | ||
5e655772 | 529 | static int __devinit platinumfb_probe(struct of_device* odev, const struct of_device_id *match) |
1da177e4 LT |
530 | { |
531 | struct device_node *dp = odev->node; | |
532 | struct fb_info *info; | |
533 | struct fb_info_platinum *pinfo; | |
534 | unsigned long addr, size; | |
535 | volatile __u8 *fbuffer; | |
536 | int i, bank0, bank1, bank2, bank3, rc; | |
537 | ||
538 | if (dp->n_addrs != 2) { | |
539 | printk(KERN_ERR "expecting 2 address for platinum (got %d)", dp->n_addrs); | |
540 | return -ENXIO; | |
541 | } | |
542 | printk(KERN_INFO "platinumfb: Found Apple Platinum video hardware\n"); | |
543 | ||
544 | info = framebuffer_alloc(sizeof(*pinfo), &odev->dev); | |
545 | if (info == NULL) | |
546 | return -ENOMEM; | |
547 | pinfo = info->par; | |
548 | ||
549 | /* Map in frame buffer and registers */ | |
550 | for (i = 0; i < dp->n_addrs; ++i) { | |
551 | addr = dp->addrs[i].address; | |
552 | size = dp->addrs[i].size; | |
553 | /* Let's assume we can request either all or nothing */ | |
554 | if (!request_mem_region(addr, size, "platinumfb")) { | |
555 | framebuffer_release(info); | |
556 | return -ENXIO; | |
557 | } | |
558 | if (size >= 0x400000) { | |
559 | /* frame buffer - map only 4MB */ | |
560 | pinfo->frame_buffer_phys = addr; | |
561 | pinfo->frame_buffer = __ioremap(addr, 0x400000, _PAGE_WRITETHRU); | |
562 | pinfo->base_frame_buffer = pinfo->frame_buffer; | |
563 | } else { | |
564 | /* registers */ | |
565 | pinfo->platinum_regs_phys = addr; | |
566 | pinfo->platinum_regs = ioremap(addr, size); | |
567 | } | |
568 | } | |
569 | ||
570 | pinfo->cmap_regs_phys = 0xf301b000; /* XXX not in prom? */ | |
571 | request_mem_region(pinfo->cmap_regs_phys, 0x1000, "platinumfb cmap"); | |
572 | pinfo->cmap_regs = ioremap(pinfo->cmap_regs_phys, 0x1000); | |
573 | ||
574 | /* Grok total video ram */ | |
575 | out_be32(&pinfo->platinum_regs->reg[16].r, (unsigned)pinfo->frame_buffer_phys); | |
576 | out_be32(&pinfo->platinum_regs->reg[20].r, 0x1011); /* select max vram */ | |
577 | out_be32(&pinfo->platinum_regs->reg[24].r, 0); /* switch in vram */ | |
578 | ||
579 | fbuffer = pinfo->base_frame_buffer; | |
580 | fbuffer[0x100000] = 0x34; | |
581 | fbuffer[0x100008] = 0x0; | |
582 | invalidate_cache(&fbuffer[0x100000]); | |
583 | fbuffer[0x200000] = 0x56; | |
584 | fbuffer[0x200008] = 0x0; | |
585 | invalidate_cache(&fbuffer[0x200000]); | |
586 | fbuffer[0x300000] = 0x78; | |
587 | fbuffer[0x300008] = 0x0; | |
588 | invalidate_cache(&fbuffer[0x300000]); | |
589 | bank0 = 1; /* builtin 1MB vram, always there */ | |
590 | bank1 = fbuffer[0x100000] == 0x34; | |
591 | bank2 = fbuffer[0x200000] == 0x56; | |
592 | bank3 = fbuffer[0x300000] == 0x78; | |
593 | pinfo->total_vram = (bank0 + bank1 + bank2 + bank3) * 0x100000; | |
594 | printk(KERN_INFO "platinumfb: Total VRAM = %dMB (%d%d%d%d)\n", (int) (pinfo->total_vram / 1024 / 1024), | |
595 | bank3, bank2, bank1, bank0); | |
596 | ||
597 | /* | |
598 | * Try to determine whether we have an old or a new DACula. | |
599 | */ | |
600 | out_8(&pinfo->cmap_regs->addr, 0x40); | |
601 | pinfo->dactype = in_8(&pinfo->cmap_regs->d2); | |
602 | switch (pinfo->dactype) { | |
603 | case 0x3c: | |
604 | pinfo->clktype = 1; | |
605 | printk(KERN_INFO "platinumfb: DACula type 0x3c\n"); | |
606 | break; | |
607 | case 0x84: | |
608 | pinfo->clktype = 0; | |
609 | printk(KERN_INFO "platinumfb: DACula type 0x84\n"); | |
610 | break; | |
611 | default: | |
612 | pinfo->clktype = 0; | |
613 | printk(KERN_INFO "platinumfb: Unknown DACula type: %x\n", pinfo->dactype); | |
614 | break; | |
615 | } | |
616 | dev_set_drvdata(&odev->dev, info); | |
617 | ||
618 | rc = platinum_init_fb(info); | |
619 | if (rc != 0) { | |
620 | dev_set_drvdata(&odev->dev, NULL); | |
621 | framebuffer_release(info); | |
622 | } | |
623 | ||
624 | return rc; | |
625 | } | |
626 | ||
627 | static int __devexit platinumfb_remove(struct of_device* odev) | |
628 | { | |
629 | struct fb_info *info = dev_get_drvdata(&odev->dev); | |
630 | struct fb_info_platinum *pinfo = info->par; | |
631 | struct device_node *dp = odev->node; | |
632 | unsigned long addr, size; | |
633 | int i; | |
634 | ||
635 | unregister_framebuffer (info); | |
636 | ||
637 | /* Unmap frame buffer and registers */ | |
638 | for (i = 0; i < dp->n_addrs; ++i) { | |
639 | addr = dp->addrs[i].address; | |
640 | size = dp->addrs[i].size; | |
641 | release_mem_region(addr, size); | |
642 | } | |
643 | iounmap(pinfo->frame_buffer); | |
644 | iounmap(pinfo->platinum_regs); | |
645 | release_mem_region(pinfo->cmap_regs_phys, 0x1000); | |
646 | iounmap(pinfo->cmap_regs); | |
647 | ||
648 | framebuffer_release(info); | |
649 | ||
650 | return 0; | |
651 | } | |
652 | ||
5e655772 | 653 | static struct of_device_id platinumfb_match[] = |
1da177e4 LT |
654 | { |
655 | { | |
656 | .name = "platinum", | |
1da177e4 LT |
657 | }, |
658 | {}, | |
659 | }; | |
660 | ||
661 | static struct of_platform_driver platinum_driver = | |
662 | { | |
663 | .name = "platinumfb", | |
664 | .match_table = platinumfb_match, | |
665 | .probe = platinumfb_probe, | |
666 | .remove = platinumfb_remove, | |
667 | }; | |
668 | ||
669 | int __init platinumfb_init(void) | |
670 | { | |
671 | #ifndef MODULE | |
672 | char *option = NULL; | |
673 | ||
674 | if (fb_get_options("platinumfb", &option)) | |
675 | return -ENODEV; | |
676 | platinumfb_setup(option); | |
677 | #endif | |
678 | of_register_driver(&platinum_driver); | |
679 | ||
680 | return 0; | |
681 | } | |
682 | ||
683 | void __exit platinumfb_exit(void) | |
684 | { | |
685 | of_unregister_driver(&platinum_driver); | |
686 | } | |
687 | ||
688 | MODULE_LICENSE("GPL"); | |
689 | MODULE_DESCRIPTION("framebuffer driver for Apple Platinum video"); | |
690 | module_init(platinumfb_init); | |
691 | ||
692 | #ifdef MODULE | |
693 | module_exit(platinumfb_exit); | |
694 | #endif |