Commit | Line | Data |
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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 | ||
1da177e4 LT |
20 | #include <linux/module.h> |
21 | #include <linux/kernel.h> | |
22 | #include <linux/errno.h> | |
23 | #include <linux/string.h> | |
24 | #include <linux/mm.h> | |
1da177e4 LT |
25 | #include <linux/slab.h> |
26 | #include <linux/vmalloc.h> | |
27 | #include <linux/delay.h> | |
28 | #include <linux/interrupt.h> | |
29 | #include <linux/fb.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/pci.h> | |
32 | #include <linux/nvram.h> | |
33 | #include <asm/io.h> | |
34 | #include <asm/prom.h> | |
35 | #include <asm/pgtable.h> | |
36 | #include <asm/of_device.h> | |
7eebde70 | 37 | #include <asm/of_platform.h> |
1da177e4 LT |
38 | |
39 | #include "macmodes.h" | |
40 | #include "platinumfb.h" | |
41 | ||
42 | static int default_vmode = VMODE_NVRAM; | |
43 | static int default_cmode = CMODE_NVRAM; | |
44 | ||
45 | struct fb_info_platinum { | |
46 | struct fb_info *info; | |
47 | ||
48 | int vmode, cmode; | |
49 | int xres, yres; | |
50 | int vxres, vyres; | |
51 | int xoffset, yoffset; | |
52 | ||
53 | struct { | |
54 | __u8 red, green, blue; | |
55 | } palette[256]; | |
56 | u32 pseudo_palette[17]; | |
57 | ||
58 | volatile struct cmap_regs __iomem *cmap_regs; | |
59 | unsigned long cmap_regs_phys; | |
60 | ||
61 | volatile struct platinum_regs __iomem *platinum_regs; | |
62 | unsigned long platinum_regs_phys; | |
63 | ||
64 | __u8 __iomem *frame_buffer; | |
65 | volatile __u8 __iomem *base_frame_buffer; | |
66 | unsigned long frame_buffer_phys; | |
67 | ||
68 | unsigned long total_vram; | |
69 | int clktype; | |
70 | int dactype; | |
cc5d0189 BH |
71 | |
72 | struct resource rsrc_fb, rsrc_reg; | |
1da177e4 LT |
73 | }; |
74 | ||
75 | /* | |
76 | * Frame buffer device API | |
77 | */ | |
78 | ||
79 | static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, | |
80 | u_int transp, struct fb_info *info); | |
81 | static int platinumfb_blank(int blank_mode, struct fb_info *info); | |
82 | static int platinumfb_set_par (struct fb_info *info); | |
83 | static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info); | |
84 | ||
85 | /* | |
86 | * internal functions | |
87 | */ | |
88 | ||
89 | static inline int platinum_vram_reqd(int video_mode, int color_mode); | |
90 | static int read_platinum_sense(struct fb_info_platinum *pinfo); | |
91 | static void set_platinum_clock(struct fb_info_platinum *pinfo); | |
92 | static void platinum_set_hardware(struct fb_info_platinum *pinfo); | |
93 | static int platinum_var_to_par(struct fb_var_screeninfo *var, | |
94 | struct fb_info_platinum *pinfo, | |
95 | int check_only); | |
96 | ||
97 | /* | |
98 | * Interface used by the world | |
99 | */ | |
100 | ||
1da177e4 LT |
101 | static struct fb_ops platinumfb_ops = { |
102 | .owner = THIS_MODULE, | |
103 | .fb_check_var = platinumfb_check_var, | |
104 | .fb_set_par = platinumfb_set_par, | |
105 | .fb_setcolreg = platinumfb_setcolreg, | |
106 | .fb_blank = platinumfb_blank, | |
107 | .fb_fillrect = cfb_fillrect, | |
108 | .fb_copyarea = cfb_copyarea, | |
109 | .fb_imageblit = cfb_imageblit, | |
1da177e4 LT |
110 | }; |
111 | ||
112 | /* | |
113 | * Checks a var structure | |
114 | */ | |
115 | static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info) | |
116 | { | |
117 | return platinum_var_to_par(var, info->par, 1); | |
118 | } | |
119 | ||
120 | /* | |
121 | * Applies current var to display | |
122 | */ | |
123 | static int platinumfb_set_par (struct fb_info *info) | |
124 | { | |
125 | struct fb_info_platinum *pinfo = info->par; | |
126 | struct platinum_regvals *init; | |
127 | int err, offset = 0x20; | |
128 | ||
129 | if((err = platinum_var_to_par(&info->var, pinfo, 0))) { | |
130 | printk (KERN_ERR "platinumfb_set_par: error calling" | |
131 | " platinum_var_to_par: %d.\n", err); | |
132 | return err; | |
133 | } | |
134 | ||
135 | platinum_set_hardware(pinfo); | |
136 | ||
137 | init = platinum_reg_init[pinfo->vmode-1]; | |
138 | ||
9cf84d7c BH |
139 | if ((pinfo->vmode == VMODE_832_624_75) && (pinfo->cmode > CMODE_8)) |
140 | offset = 0x10; | |
141 | ||
1da177e4 LT |
142 | info->screen_base = pinfo->frame_buffer + init->fb_offset + offset; |
143 | info->fix.smem_start = (pinfo->frame_buffer_phys) + init->fb_offset + offset; | |
144 | info->fix.visual = (pinfo->cmode == CMODE_8) ? | |
145 | FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR; | |
9cf84d7c BH |
146 | info->fix.line_length = vmode_attrs[pinfo->vmode-1].hres * (1<<pinfo->cmode) |
147 | + offset; | |
1da177e4 LT |
148 | printk("line_length: %x\n", info->fix.line_length); |
149 | return 0; | |
150 | } | |
151 | ||
152 | static int platinumfb_blank(int blank, struct fb_info *fb) | |
153 | { | |
154 | /* | |
155 | * Blank the screen if blank_mode != 0, else unblank. If blank == NULL | |
156 | * then the caller blanks by setting the CLUT (Color Look Up Table) to all | |
157 | * black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due | |
158 | * to e.g. a video mode which doesn't support it. Implements VESA suspend | |
159 | * and powerdown modes on hardware that supports disabling hsync/vsync: | |
160 | * blank_mode == 2: suspend vsync | |
161 | * blank_mode == 3: suspend hsync | |
162 | * blank_mode == 4: powerdown | |
163 | */ | |
164 | /* [danj] I think there's something fishy about those constants... */ | |
165 | /* | |
166 | struct fb_info_platinum *info = (struct fb_info_platinum *) fb; | |
167 | int ctrl; | |
168 | ||
169 | ctrl = ld_le32(&info->platinum_regs->ctrl.r) | 0x33; | |
170 | if (blank) | |
171 | --blank_mode; | |
172 | if (blank & VESA_VSYNC_SUSPEND) | |
173 | ctrl &= ~3; | |
174 | if (blank & VESA_HSYNC_SUSPEND) | |
175 | ctrl &= ~0x30; | |
176 | out_le32(&info->platinum_regs->ctrl.r, ctrl); | |
177 | */ | |
178 | /* TODO: Figure out how the heck to powerdown this thing! */ | |
179 | return 0; | |
180 | } | |
181 | ||
182 | static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, | |
183 | u_int transp, struct fb_info *info) | |
184 | { | |
185 | struct fb_info_platinum *pinfo = info->par; | |
186 | volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs; | |
187 | ||
188 | if (regno > 255) | |
189 | return 1; | |
190 | ||
191 | red >>= 8; | |
192 | green >>= 8; | |
193 | blue >>= 8; | |
194 | ||
195 | pinfo->palette[regno].red = red; | |
196 | pinfo->palette[regno].green = green; | |
197 | pinfo->palette[regno].blue = blue; | |
198 | ||
199 | out_8(&cmap_regs->addr, regno); /* tell clut what addr to fill */ | |
200 | out_8(&cmap_regs->lut, red); /* send one color channel at */ | |
201 | out_8(&cmap_regs->lut, green); /* a time... */ | |
202 | out_8(&cmap_regs->lut, blue); | |
203 | ||
204 | if (regno < 16) { | |
205 | int i; | |
206 | u32 *pal = info->pseudo_palette; | |
207 | switch (pinfo->cmode) { | |
208 | case CMODE_16: | |
209 | pal[regno] = (regno << 10) | (regno << 5) | regno; | |
210 | break; | |
211 | case CMODE_32: | |
212 | i = (regno << 8) | regno; | |
213 | pal[regno] = (i << 16) | i; | |
214 | break; | |
215 | } | |
216 | } | |
217 | ||
218 | return 0; | |
219 | } | |
220 | ||
221 | static inline int platinum_vram_reqd(int video_mode, int color_mode) | |
222 | { | |
223 | return vmode_attrs[video_mode-1].vres * | |
9cf84d7c BH |
224 | (vmode_attrs[video_mode-1].hres * (1<<color_mode) + |
225 | ((video_mode == VMODE_832_624_75) && | |
226 | (color_mode > CMODE_8)) ? 0x10 : 0x20) + 0x1000; | |
1da177e4 LT |
227 | } |
228 | ||
229 | #define STORE_D2(a, d) { \ | |
230 | out_8(&cmap_regs->addr, (a+32)); \ | |
231 | out_8(&cmap_regs->d2, (d)); \ | |
232 | } | |
233 | ||
234 | static void set_platinum_clock(struct fb_info_platinum *pinfo) | |
235 | { | |
236 | volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs; | |
237 | struct platinum_regvals *init; | |
238 | ||
239 | init = platinum_reg_init[pinfo->vmode-1]; | |
240 | ||
241 | STORE_D2(6, 0xc6); | |
242 | out_8(&cmap_regs->addr,3+32); | |
243 | ||
244 | if (in_8(&cmap_regs->d2) == 2) { | |
245 | STORE_D2(7, init->clock_params[pinfo->clktype][0]); | |
246 | STORE_D2(8, init->clock_params[pinfo->clktype][1]); | |
247 | STORE_D2(3, 3); | |
248 | } else { | |
249 | STORE_D2(4, init->clock_params[pinfo->clktype][0]); | |
250 | STORE_D2(5, init->clock_params[pinfo->clktype][1]); | |
251 | STORE_D2(3, 2); | |
252 | } | |
253 | ||
254 | __delay(5000); | |
255 | STORE_D2(9, 0xa6); | |
256 | } | |
257 | ||
258 | ||
259 | /* Now how about actually saying, Make it so! */ | |
260 | /* Some things in here probably don't need to be done each time. */ | |
261 | static void platinum_set_hardware(struct fb_info_platinum *pinfo) | |
262 | { | |
263 | volatile struct platinum_regs __iomem *platinum_regs = pinfo->platinum_regs; | |
264 | volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs; | |
265 | struct platinum_regvals *init; | |
266 | int i; | |
267 | int vmode, cmode; | |
268 | ||
269 | vmode = pinfo->vmode; | |
270 | cmode = pinfo->cmode; | |
271 | ||
272 | init = platinum_reg_init[vmode - 1]; | |
273 | ||
274 | /* Initialize display timing registers */ | |
275 | out_be32(&platinum_regs->reg[24].r, 7); /* turn display off */ | |
276 | ||
277 | for (i = 0; i < 26; ++i) | |
278 | out_be32(&platinum_regs->reg[i+32].r, init->regs[i]); | |
279 | ||
280 | out_be32(&platinum_regs->reg[26+32].r, (pinfo->total_vram == 0x100000 ? | |
281 | init->offset[cmode] + 4 - cmode : | |
282 | init->offset[cmode])); | |
283 | out_be32(&platinum_regs->reg[16].r, (unsigned) pinfo->frame_buffer_phys+init->fb_offset+0x10); | |
284 | out_be32(&platinum_regs->reg[18].r, init->pitch[cmode]); | |
285 | out_be32(&platinum_regs->reg[19].r, (pinfo->total_vram == 0x100000 ? | |
286 | init->mode[cmode+1] : | |
287 | init->mode[cmode])); | |
288 | out_be32(&platinum_regs->reg[20].r, (pinfo->total_vram == 0x100000 ? 0x11 : 0x1011)); | |
289 | out_be32(&platinum_regs->reg[21].r, 0x100); | |
290 | out_be32(&platinum_regs->reg[22].r, 1); | |
291 | out_be32(&platinum_regs->reg[23].r, 1); | |
292 | out_be32(&platinum_regs->reg[26].r, 0xc00); | |
293 | out_be32(&platinum_regs->reg[27].r, 0x235); | |
294 | /* out_be32(&platinum_regs->reg[27].r, 0x2aa); */ | |
295 | ||
296 | STORE_D2(0, (pinfo->total_vram == 0x100000 ? | |
297 | init->dacula_ctrl[cmode] & 0xf : | |
298 | init->dacula_ctrl[cmode])); | |
299 | STORE_D2(1, 4); | |
300 | STORE_D2(2, 0); | |
301 | ||
302 | set_platinum_clock(pinfo); | |
303 | ||
304 | out_be32(&platinum_regs->reg[24].r, 0); /* turn display on */ | |
305 | } | |
306 | ||
307 | /* | |
308 | * Set misc info vars for this driver | |
309 | */ | |
310 | static void __devinit platinum_init_info(struct fb_info *info, struct fb_info_platinum *pinfo) | |
311 | { | |
312 | /* Fill fb_info */ | |
313 | info->fbops = &platinumfb_ops; | |
314 | info->pseudo_palette = pinfo->pseudo_palette; | |
315 | info->flags = FBINFO_DEFAULT; | |
316 | info->screen_base = pinfo->frame_buffer + 0x20; | |
317 | ||
318 | fb_alloc_cmap(&info->cmap, 256, 0); | |
319 | ||
320 | /* Fill fix common fields */ | |
321 | strcpy(info->fix.id, "platinum"); | |
322 | info->fix.mmio_start = pinfo->platinum_regs_phys; | |
323 | info->fix.mmio_len = 0x1000; | |
324 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
325 | info->fix.smem_start = pinfo->frame_buffer_phys + 0x20; /* will be updated later */ | |
326 | info->fix.smem_len = pinfo->total_vram - 0x20; | |
327 | info->fix.ywrapstep = 0; | |
328 | info->fix.xpanstep = 0; | |
329 | info->fix.ypanstep = 0; | |
330 | info->fix.type_aux = 0; | |
331 | info->fix.accel = FB_ACCEL_NONE; | |
332 | } | |
333 | ||
334 | ||
335 | static int __devinit platinum_init_fb(struct fb_info *info) | |
336 | { | |
337 | struct fb_info_platinum *pinfo = info->par; | |
338 | struct fb_var_screeninfo var; | |
339 | int sense, rc; | |
340 | ||
341 | sense = read_platinum_sense(pinfo); | |
342 | printk(KERN_INFO "platinumfb: Monitor sense value = 0x%x, ", sense); | |
1da177e4 | 343 | if (default_vmode == VMODE_NVRAM) { |
f3f6f9aa | 344 | #ifdef CONFIG_NVRAM |
1da177e4 LT |
345 | default_vmode = nvram_read_byte(NV_VMODE); |
346 | if (default_vmode <= 0 || default_vmode > VMODE_MAX || | |
347 | !platinum_reg_init[default_vmode-1]) | |
f3f6f9aa | 348 | #endif |
1da177e4 LT |
349 | default_vmode = VMODE_CHOOSE; |
350 | } | |
351 | if (default_vmode == VMODE_CHOOSE) { | |
352 | default_vmode = mac_map_monitor_sense(sense); | |
353 | } | |
354 | if (default_vmode <= 0 || default_vmode > VMODE_MAX) | |
355 | default_vmode = VMODE_640_480_60; | |
f3f6f9aa | 356 | #ifdef CONFIG_NVRAM |
1da177e4 LT |
357 | if (default_cmode == CMODE_NVRAM) |
358 | default_cmode = nvram_read_byte(NV_CMODE); | |
f3f6f9aa | 359 | #endif |
1da177e4 LT |
360 | if (default_cmode < CMODE_8 || default_cmode > CMODE_32) |
361 | default_cmode = CMODE_8; | |
362 | /* | |
363 | * Reduce the pixel size if we don't have enough VRAM. | |
364 | */ | |
365 | while(default_cmode > CMODE_8 && | |
366 | platinum_vram_reqd(default_vmode, default_cmode) > pinfo->total_vram) | |
367 | default_cmode--; | |
368 | ||
369 | printk("platinumfb: Using video mode %d and color mode %d.\n", default_vmode, default_cmode); | |
370 | ||
371 | /* Setup default var */ | |
372 | if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) { | |
373 | /* This shouldn't happen! */ | |
374 | printk("mac_vmode_to_var(%d, %d,) failed\n", default_vmode, default_cmode); | |
375 | try_again: | |
376 | default_vmode = VMODE_640_480_60; | |
377 | default_cmode = CMODE_8; | |
378 | if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) { | |
379 | printk(KERN_ERR "platinumfb: mac_vmode_to_var() failed\n"); | |
380 | return -ENXIO; | |
381 | } | |
382 | } | |
383 | ||
384 | /* Initialize info structure */ | |
385 | platinum_init_info(info, pinfo); | |
386 | ||
387 | /* Apply default var */ | |
388 | info->var = var; | |
389 | var.activate = FB_ACTIVATE_NOW; | |
390 | rc = fb_set_var(info, &var); | |
391 | if (rc && (default_vmode != VMODE_640_480_60 || default_cmode != CMODE_8)) | |
392 | goto try_again; | |
393 | ||
394 | /* Register with fbdev layer */ | |
395 | rc = register_framebuffer(info); | |
396 | if (rc < 0) | |
397 | return rc; | |
398 | ||
399 | printk(KERN_INFO "fb%d: Apple Platinum frame buffer device\n", info->node); | |
400 | ||
401 | return 0; | |
402 | } | |
403 | ||
404 | /* | |
405 | * Get the monitor sense value. | |
406 | * Note that this can be called before calibrate_delay, | |
407 | * so we can't use udelay. | |
408 | */ | |
409 | static int read_platinum_sense(struct fb_info_platinum *info) | |
410 | { | |
411 | volatile struct platinum_regs __iomem *platinum_regs = info->platinum_regs; | |
412 | int sense; | |
413 | ||
414 | out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */ | |
415 | __delay(2000); | |
416 | sense = (~in_be32(&platinum_regs->reg[23].r) & 7) << 8; | |
417 | ||
418 | /* drive each sense line low in turn and collect the other 2 */ | |
419 | out_be32(&platinum_regs->reg[23].r, 3); /* drive A low */ | |
420 | __delay(2000); | |
421 | sense |= (~in_be32(&platinum_regs->reg[23].r) & 3) << 4; | |
422 | out_be32(&platinum_regs->reg[23].r, 5); /* drive B low */ | |
423 | __delay(2000); | |
424 | sense |= (~in_be32(&platinum_regs->reg[23].r) & 4) << 1; | |
425 | sense |= (~in_be32(&platinum_regs->reg[23].r) & 1) << 2; | |
426 | out_be32(&platinum_regs->reg[23].r, 6); /* drive C low */ | |
427 | __delay(2000); | |
428 | sense |= (~in_be32(&platinum_regs->reg[23].r) & 6) >> 1; | |
429 | ||
430 | out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */ | |
431 | ||
432 | return sense; | |
433 | } | |
434 | ||
435 | /* | |
436 | * This routine takes a user-supplied var, and picks the best vmode/cmode from it. | |
437 | * It also updates the var structure to the actual mode data obtained | |
438 | */ | |
439 | static int platinum_var_to_par(struct fb_var_screeninfo *var, | |
440 | struct fb_info_platinum *pinfo, | |
441 | int check_only) | |
442 | { | |
443 | int vmode, cmode; | |
444 | ||
445 | if (mac_var_to_vmode(var, &vmode, &cmode) != 0) { | |
446 | printk(KERN_ERR "platinum_var_to_par: mac_var_to_vmode unsuccessful.\n"); | |
447 | printk(KERN_ERR "platinum_var_to_par: var->xres = %d\n", var->xres); | |
448 | printk(KERN_ERR "platinum_var_to_par: var->yres = %d\n", var->yres); | |
449 | printk(KERN_ERR "platinum_var_to_par: var->xres_virtual = %d\n", var->xres_virtual); | |
450 | printk(KERN_ERR "platinum_var_to_par: var->yres_virtual = %d\n", var->yres_virtual); | |
451 | printk(KERN_ERR "platinum_var_to_par: var->bits_per_pixel = %d\n", var->bits_per_pixel); | |
452 | printk(KERN_ERR "platinum_var_to_par: var->pixclock = %d\n", var->pixclock); | |
453 | printk(KERN_ERR "platinum_var_to_par: var->vmode = %d\n", var->vmode); | |
454 | return -EINVAL; | |
455 | } | |
456 | ||
457 | if (!platinum_reg_init[vmode-1]) { | |
458 | printk(KERN_ERR "platinum_var_to_par, vmode %d not valid.\n", vmode); | |
459 | return -EINVAL; | |
460 | } | |
461 | ||
462 | if (platinum_vram_reqd(vmode, cmode) > pinfo->total_vram) { | |
463 | printk(KERN_ERR "platinum_var_to_par, not enough ram for vmode %d, cmode %d.\n", vmode, cmode); | |
464 | return -EINVAL; | |
465 | } | |
466 | ||
467 | if (mac_vmode_to_var(vmode, cmode, var)) | |
468 | return -EINVAL; | |
469 | ||
470 | if (check_only) | |
471 | return 0; | |
472 | ||
473 | pinfo->vmode = vmode; | |
474 | pinfo->cmode = cmode; | |
475 | pinfo->xres = vmode_attrs[vmode-1].hres; | |
476 | pinfo->yres = vmode_attrs[vmode-1].vres; | |
477 | pinfo->xoffset = 0; | |
478 | pinfo->yoffset = 0; | |
479 | pinfo->vxres = pinfo->xres; | |
480 | pinfo->vyres = pinfo->yres; | |
481 | ||
482 | return 0; | |
483 | } | |
484 | ||
485 | ||
486 | /* | |
487 | * Parse user speficied options (`video=platinumfb:') | |
488 | */ | |
cc5d0189 | 489 | static int __init platinumfb_setup(char *options) |
1da177e4 LT |
490 | { |
491 | char *this_opt; | |
492 | ||
493 | if (!options || !*options) | |
494 | return 0; | |
495 | ||
496 | while ((this_opt = strsep(&options, ",")) != NULL) { | |
497 | if (!strncmp(this_opt, "vmode:", 6)) { | |
498 | int vmode = simple_strtoul(this_opt+6, NULL, 0); | |
499 | if (vmode > 0 && vmode <= VMODE_MAX) | |
500 | default_vmode = vmode; | |
501 | } else if (!strncmp(this_opt, "cmode:", 6)) { | |
502 | int depth = simple_strtoul(this_opt+6, NULL, 0); | |
503 | switch (depth) { | |
504 | case 0: | |
505 | case 8: | |
506 | default_cmode = CMODE_8; | |
507 | break; | |
508 | case 15: | |
509 | case 16: | |
510 | default_cmode = CMODE_16; | |
511 | break; | |
512 | case 24: | |
513 | case 32: | |
514 | default_cmode = CMODE_32; | |
515 | break; | |
516 | } | |
517 | } | |
518 | } | |
519 | return 0; | |
520 | } | |
521 | ||
522 | #ifdef __powerpc__ | |
523 | #define invalidate_cache(addr) \ | |
524 | asm volatile("eieio; dcbf 0,%1" \ | |
525 | : "=m" (*(addr)) : "r" (addr) : "memory"); | |
526 | #else | |
527 | #define invalidate_cache(addr) | |
528 | #endif | |
529 | ||
cc5d0189 BH |
530 | static int __devinit platinumfb_probe(struct of_device* odev, |
531 | const struct of_device_id *match) | |
1da177e4 LT |
532 | { |
533 | struct device_node *dp = odev->node; | |
534 | struct fb_info *info; | |
535 | struct fb_info_platinum *pinfo; | |
1da177e4 | 536 | volatile __u8 *fbuffer; |
cc5d0189 | 537 | int bank0, bank1, bank2, bank3, rc; |
1da177e4 | 538 | |
1da177e4 LT |
539 | printk(KERN_INFO "platinumfb: Found Apple Platinum video hardware\n"); |
540 | ||
541 | info = framebuffer_alloc(sizeof(*pinfo), &odev->dev); | |
542 | if (info == NULL) | |
543 | return -ENOMEM; | |
544 | pinfo = info->par; | |
545 | ||
cc5d0189 BH |
546 | if (of_address_to_resource(dp, 0, &pinfo->rsrc_reg) || |
547 | of_address_to_resource(dp, 1, &pinfo->rsrc_fb)) { | |
548 | printk(KERN_ERR "platinumfb: Can't get resources\n"); | |
549 | framebuffer_release(info); | |
550 | return -ENXIO; | |
1da177e4 | 551 | } |
cc5d0189 BH |
552 | if (!request_mem_region(pinfo->rsrc_reg.start, |
553 | pinfo->rsrc_reg.start - | |
554 | pinfo->rsrc_reg.end + 1, | |
555 | "platinumfb registers")) { | |
556 | framebuffer_release(info); | |
557 | return -ENXIO; | |
558 | } | |
559 | if (!request_mem_region(pinfo->rsrc_fb.start, | |
560 | pinfo->rsrc_fb.start | |
561 | - pinfo->rsrc_fb.end + 1, | |
562 | "platinumfb framebuffer")) { | |
563 | release_mem_region(pinfo->rsrc_reg.start, | |
564 | pinfo->rsrc_reg.end - | |
565 | pinfo->rsrc_reg.start + 1); | |
566 | framebuffer_release(info); | |
567 | return -ENXIO; | |
568 | } | |
569 | ||
570 | /* frame buffer - map only 4MB */ | |
571 | pinfo->frame_buffer_phys = pinfo->rsrc_fb.start; | |
572 | pinfo->frame_buffer = __ioremap(pinfo->rsrc_fb.start, 0x400000, | |
573 | _PAGE_WRITETHRU); | |
574 | pinfo->base_frame_buffer = pinfo->frame_buffer; | |
575 | ||
576 | /* registers */ | |
577 | pinfo->platinum_regs_phys = pinfo->rsrc_reg.start; | |
578 | pinfo->platinum_regs = ioremap(pinfo->rsrc_reg.start, 0x1000); | |
1da177e4 LT |
579 | |
580 | pinfo->cmap_regs_phys = 0xf301b000; /* XXX not in prom? */ | |
581 | request_mem_region(pinfo->cmap_regs_phys, 0x1000, "platinumfb cmap"); | |
582 | pinfo->cmap_regs = ioremap(pinfo->cmap_regs_phys, 0x1000); | |
583 | ||
584 | /* Grok total video ram */ | |
585 | out_be32(&pinfo->platinum_regs->reg[16].r, (unsigned)pinfo->frame_buffer_phys); | |
586 | out_be32(&pinfo->platinum_regs->reg[20].r, 0x1011); /* select max vram */ | |
587 | out_be32(&pinfo->platinum_regs->reg[24].r, 0); /* switch in vram */ | |
588 | ||
589 | fbuffer = pinfo->base_frame_buffer; | |
590 | fbuffer[0x100000] = 0x34; | |
591 | fbuffer[0x100008] = 0x0; | |
592 | invalidate_cache(&fbuffer[0x100000]); | |
593 | fbuffer[0x200000] = 0x56; | |
594 | fbuffer[0x200008] = 0x0; | |
595 | invalidate_cache(&fbuffer[0x200000]); | |
596 | fbuffer[0x300000] = 0x78; | |
597 | fbuffer[0x300008] = 0x0; | |
598 | invalidate_cache(&fbuffer[0x300000]); | |
599 | bank0 = 1; /* builtin 1MB vram, always there */ | |
600 | bank1 = fbuffer[0x100000] == 0x34; | |
601 | bank2 = fbuffer[0x200000] == 0x56; | |
602 | bank3 = fbuffer[0x300000] == 0x78; | |
603 | pinfo->total_vram = (bank0 + bank1 + bank2 + bank3) * 0x100000; | |
604 | printk(KERN_INFO "platinumfb: Total VRAM = %dMB (%d%d%d%d)\n", (int) (pinfo->total_vram / 1024 / 1024), | |
605 | bank3, bank2, bank1, bank0); | |
606 | ||
607 | /* | |
608 | * Try to determine whether we have an old or a new DACula. | |
609 | */ | |
610 | out_8(&pinfo->cmap_regs->addr, 0x40); | |
611 | pinfo->dactype = in_8(&pinfo->cmap_regs->d2); | |
612 | switch (pinfo->dactype) { | |
613 | case 0x3c: | |
614 | pinfo->clktype = 1; | |
615 | printk(KERN_INFO "platinumfb: DACula type 0x3c\n"); | |
616 | break; | |
617 | case 0x84: | |
618 | pinfo->clktype = 0; | |
619 | printk(KERN_INFO "platinumfb: DACula type 0x84\n"); | |
620 | break; | |
621 | default: | |
622 | pinfo->clktype = 0; | |
623 | printk(KERN_INFO "platinumfb: Unknown DACula type: %x\n", pinfo->dactype); | |
624 | break; | |
625 | } | |
626 | dev_set_drvdata(&odev->dev, info); | |
627 | ||
628 | rc = platinum_init_fb(info); | |
629 | if (rc != 0) { | |
630 | dev_set_drvdata(&odev->dev, NULL); | |
631 | framebuffer_release(info); | |
632 | } | |
633 | ||
634 | return rc; | |
635 | } | |
636 | ||
637 | static int __devexit platinumfb_remove(struct of_device* odev) | |
638 | { | |
639 | struct fb_info *info = dev_get_drvdata(&odev->dev); | |
640 | struct fb_info_platinum *pinfo = info->par; | |
1da177e4 LT |
641 | |
642 | unregister_framebuffer (info); | |
643 | ||
644 | /* Unmap frame buffer and registers */ | |
cc5d0189 BH |
645 | release_mem_region(pinfo->rsrc_fb.start, |
646 | pinfo->rsrc_fb.end - | |
647 | pinfo->rsrc_fb.start + 1); | |
648 | release_mem_region(pinfo->rsrc_reg.start, | |
649 | pinfo->rsrc_reg.end - | |
650 | pinfo->rsrc_reg.start + 1); | |
1da177e4 LT |
651 | iounmap(pinfo->frame_buffer); |
652 | iounmap(pinfo->platinum_regs); | |
653 | release_mem_region(pinfo->cmap_regs_phys, 0x1000); | |
654 | iounmap(pinfo->cmap_regs); | |
655 | ||
656 | framebuffer_release(info); | |
657 | ||
658 | return 0; | |
659 | } | |
660 | ||
5e655772 | 661 | static struct of_device_id platinumfb_match[] = |
1da177e4 LT |
662 | { |
663 | { | |
664 | .name = "platinum", | |
1da177e4 LT |
665 | }, |
666 | {}, | |
667 | }; | |
668 | ||
669 | static struct of_platform_driver platinum_driver = | |
670 | { | |
671 | .name = "platinumfb", | |
672 | .match_table = platinumfb_match, | |
673 | .probe = platinumfb_probe, | |
674 | .remove = platinumfb_remove, | |
675 | }; | |
676 | ||
cc5d0189 | 677 | static int __init platinumfb_init(void) |
1da177e4 LT |
678 | { |
679 | #ifndef MODULE | |
680 | char *option = NULL; | |
681 | ||
682 | if (fb_get_options("platinumfb", &option)) | |
683 | return -ENODEV; | |
684 | platinumfb_setup(option); | |
685 | #endif | |
7eebde70 | 686 | of_register_platform_driver(&platinum_driver); |
1da177e4 LT |
687 | |
688 | return 0; | |
689 | } | |
690 | ||
cc5d0189 | 691 | static void __exit platinumfb_exit(void) |
1da177e4 | 692 | { |
7eebde70 | 693 | of_unregister_platform_driver(&platinum_driver); |
1da177e4 LT |
694 | } |
695 | ||
696 | MODULE_LICENSE("GPL"); | |
697 | MODULE_DESCRIPTION("framebuffer driver for Apple Platinum video"); | |
698 | module_init(platinumfb_init); | |
699 | ||
700 | #ifdef MODULE | |
701 | module_exit(platinumfb_exit); | |
702 | #endif |