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 | ||
4c2a54b0 BH |
20 | #undef DEBUG |
21 | ||
1da177e4 LT |
22 | #include <linux/module.h> |
23 | #include <linux/kernel.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/string.h> | |
26 | #include <linux/mm.h> | |
1da177e4 LT |
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> | |
1da177e4 LT |
33 | #include <linux/nvram.h> |
34 | #include <asm/io.h> | |
35 | #include <asm/prom.h> | |
36 | #include <asm/pgtable.h> | |
37 | #include <asm/of_device.h> | |
7eebde70 | 38 | #include <asm/of_platform.h> |
1da177e4 LT |
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]; | |
02c2c209 | 57 | u32 pseudo_palette[16]; |
1da177e4 LT |
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; | |
cc5d0189 BH |
72 | |
73 | struct resource rsrc_fb, rsrc_reg; | |
1da177e4 LT |
74 | }; |
75 | ||
76 | /* | |
77 | * Frame buffer device API | |
78 | */ | |
79 | ||
80 | static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, | |
81 | u_int transp, struct fb_info *info); | |
82 | static int platinumfb_blank(int blank_mode, struct fb_info *info); | |
83 | static int platinumfb_set_par (struct fb_info *info); | |
84 | static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info); | |
85 | ||
86 | /* | |
87 | * internal functions | |
88 | */ | |
89 | ||
90 | static inline int platinum_vram_reqd(int video_mode, int color_mode); | |
91 | static int read_platinum_sense(struct fb_info_platinum *pinfo); | |
92 | static void set_platinum_clock(struct fb_info_platinum *pinfo); | |
93 | static void platinum_set_hardware(struct fb_info_platinum *pinfo); | |
94 | static int platinum_var_to_par(struct fb_var_screeninfo *var, | |
95 | struct fb_info_platinum *pinfo, | |
96 | int check_only); | |
97 | ||
98 | /* | |
99 | * Interface used by the world | |
100 | */ | |
101 | ||
1da177e4 LT |
102 | static struct fb_ops platinumfb_ops = { |
103 | .owner = THIS_MODULE, | |
104 | .fb_check_var = platinumfb_check_var, | |
105 | .fb_set_par = platinumfb_set_par, | |
106 | .fb_setcolreg = platinumfb_setcolreg, | |
107 | .fb_blank = platinumfb_blank, | |
108 | .fb_fillrect = cfb_fillrect, | |
109 | .fb_copyarea = cfb_copyarea, | |
110 | .fb_imageblit = cfb_imageblit, | |
1da177e4 LT |
111 | }; |
112 | ||
113 | /* | |
114 | * Checks a var structure | |
115 | */ | |
116 | static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info) | |
117 | { | |
118 | return platinum_var_to_par(var, info->par, 1); | |
119 | } | |
120 | ||
121 | /* | |
122 | * Applies current var to display | |
123 | */ | |
124 | static int platinumfb_set_par (struct fb_info *info) | |
125 | { | |
126 | struct fb_info_platinum *pinfo = info->par; | |
127 | struct platinum_regvals *init; | |
128 | int err, offset = 0x20; | |
129 | ||
130 | if((err = platinum_var_to_par(&info->var, pinfo, 0))) { | |
131 | printk (KERN_ERR "platinumfb_set_par: error calling" | |
132 | " platinum_var_to_par: %d.\n", err); | |
133 | return err; | |
134 | } | |
135 | ||
136 | platinum_set_hardware(pinfo); | |
137 | ||
138 | init = platinum_reg_init[pinfo->vmode-1]; | |
139 | ||
9cf84d7c BH |
140 | if ((pinfo->vmode == VMODE_832_624_75) && (pinfo->cmode > CMODE_8)) |
141 | offset = 0x10; | |
142 | ||
1da177e4 LT |
143 | info->screen_base = pinfo->frame_buffer + init->fb_offset + offset; |
144 | info->fix.smem_start = (pinfo->frame_buffer_phys) + init->fb_offset + offset; | |
145 | info->fix.visual = (pinfo->cmode == CMODE_8) ? | |
146 | FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR; | |
9cf84d7c BH |
147 | info->fix.line_length = vmode_attrs[pinfo->vmode-1].hres * (1<<pinfo->cmode) |
148 | + offset; | |
1da177e4 LT |
149 | printk("line_length: %x\n", info->fix.line_length); |
150 | return 0; | |
151 | } | |
152 | ||
153 | static int platinumfb_blank(int blank, struct fb_info *fb) | |
154 | { | |
155 | /* | |
156 | * Blank the screen if blank_mode != 0, else unblank. If blank == NULL | |
157 | * then the caller blanks by setting the CLUT (Color Look Up Table) to all | |
158 | * black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due | |
159 | * to e.g. a video mode which doesn't support it. Implements VESA suspend | |
160 | * and powerdown modes on hardware that supports disabling hsync/vsync: | |
161 | * blank_mode == 2: suspend vsync | |
162 | * blank_mode == 3: suspend hsync | |
163 | * blank_mode == 4: powerdown | |
164 | */ | |
165 | /* [danj] I think there's something fishy about those constants... */ | |
166 | /* | |
167 | struct fb_info_platinum *info = (struct fb_info_platinum *) fb; | |
168 | int ctrl; | |
169 | ||
170 | ctrl = ld_le32(&info->platinum_regs->ctrl.r) | 0x33; | |
171 | if (blank) | |
172 | --blank_mode; | |
173 | if (blank & VESA_VSYNC_SUSPEND) | |
174 | ctrl &= ~3; | |
175 | if (blank & VESA_HSYNC_SUSPEND) | |
176 | ctrl &= ~0x30; | |
177 | out_le32(&info->platinum_regs->ctrl.r, ctrl); | |
178 | */ | |
179 | /* TODO: Figure out how the heck to powerdown this thing! */ | |
180 | return 0; | |
181 | } | |
182 | ||
183 | static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, | |
184 | u_int transp, struct fb_info *info) | |
185 | { | |
186 | struct fb_info_platinum *pinfo = info->par; | |
187 | volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs; | |
188 | ||
189 | if (regno > 255) | |
190 | return 1; | |
191 | ||
192 | red >>= 8; | |
193 | green >>= 8; | |
194 | blue >>= 8; | |
195 | ||
196 | pinfo->palette[regno].red = red; | |
197 | pinfo->palette[regno].green = green; | |
198 | pinfo->palette[regno].blue = blue; | |
199 | ||
200 | out_8(&cmap_regs->addr, regno); /* tell clut what addr to fill */ | |
201 | out_8(&cmap_regs->lut, red); /* send one color channel at */ | |
202 | out_8(&cmap_regs->lut, green); /* a time... */ | |
203 | out_8(&cmap_regs->lut, blue); | |
204 | ||
205 | if (regno < 16) { | |
206 | int i; | |
207 | u32 *pal = info->pseudo_palette; | |
208 | switch (pinfo->cmode) { | |
209 | case CMODE_16: | |
210 | pal[regno] = (regno << 10) | (regno << 5) | regno; | |
211 | break; | |
212 | case CMODE_32: | |
213 | i = (regno << 8) | regno; | |
214 | pal[regno] = (i << 16) | i; | |
215 | break; | |
216 | } | |
217 | } | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
222 | static inline int platinum_vram_reqd(int video_mode, int color_mode) | |
223 | { | |
224 | return vmode_attrs[video_mode-1].vres * | |
9cf84d7c BH |
225 | (vmode_attrs[video_mode-1].hres * (1<<color_mode) + |
226 | ((video_mode == VMODE_832_624_75) && | |
227 | (color_mode > CMODE_8)) ? 0x10 : 0x20) + 0x1000; | |
1da177e4 LT |
228 | } |
229 | ||
230 | #define STORE_D2(a, d) { \ | |
231 | out_8(&cmap_regs->addr, (a+32)); \ | |
232 | out_8(&cmap_regs->d2, (d)); \ | |
233 | } | |
234 | ||
235 | static void set_platinum_clock(struct fb_info_platinum *pinfo) | |
236 | { | |
237 | volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs; | |
238 | struct platinum_regvals *init; | |
239 | ||
240 | init = platinum_reg_init[pinfo->vmode-1]; | |
241 | ||
242 | STORE_D2(6, 0xc6); | |
243 | out_8(&cmap_regs->addr,3+32); | |
244 | ||
245 | if (in_8(&cmap_regs->d2) == 2) { | |
246 | STORE_D2(7, init->clock_params[pinfo->clktype][0]); | |
247 | STORE_D2(8, init->clock_params[pinfo->clktype][1]); | |
248 | STORE_D2(3, 3); | |
249 | } else { | |
250 | STORE_D2(4, init->clock_params[pinfo->clktype][0]); | |
251 | STORE_D2(5, init->clock_params[pinfo->clktype][1]); | |
252 | STORE_D2(3, 2); | |
253 | } | |
254 | ||
255 | __delay(5000); | |
256 | STORE_D2(9, 0xa6); | |
257 | } | |
258 | ||
259 | ||
260 | /* Now how about actually saying, Make it so! */ | |
261 | /* Some things in here probably don't need to be done each time. */ | |
262 | static void platinum_set_hardware(struct fb_info_platinum *pinfo) | |
263 | { | |
264 | volatile struct platinum_regs __iomem *platinum_regs = pinfo->platinum_regs; | |
265 | volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs; | |
266 | struct platinum_regvals *init; | |
267 | int i; | |
268 | int vmode, cmode; | |
269 | ||
270 | vmode = pinfo->vmode; | |
271 | cmode = pinfo->cmode; | |
272 | ||
273 | init = platinum_reg_init[vmode - 1]; | |
274 | ||
275 | /* Initialize display timing registers */ | |
276 | out_be32(&platinum_regs->reg[24].r, 7); /* turn display off */ | |
277 | ||
278 | for (i = 0; i < 26; ++i) | |
279 | out_be32(&platinum_regs->reg[i+32].r, init->regs[i]); | |
280 | ||
281 | out_be32(&platinum_regs->reg[26+32].r, (pinfo->total_vram == 0x100000 ? | |
282 | init->offset[cmode] + 4 - cmode : | |
283 | init->offset[cmode])); | |
284 | out_be32(&platinum_regs->reg[16].r, (unsigned) pinfo->frame_buffer_phys+init->fb_offset+0x10); | |
285 | out_be32(&platinum_regs->reg[18].r, init->pitch[cmode]); | |
286 | out_be32(&platinum_regs->reg[19].r, (pinfo->total_vram == 0x100000 ? | |
287 | init->mode[cmode+1] : | |
288 | init->mode[cmode])); | |
289 | out_be32(&platinum_regs->reg[20].r, (pinfo->total_vram == 0x100000 ? 0x11 : 0x1011)); | |
290 | out_be32(&platinum_regs->reg[21].r, 0x100); | |
291 | out_be32(&platinum_regs->reg[22].r, 1); | |
292 | out_be32(&platinum_regs->reg[23].r, 1); | |
293 | out_be32(&platinum_regs->reg[26].r, 0xc00); | |
294 | out_be32(&platinum_regs->reg[27].r, 0x235); | |
295 | /* out_be32(&platinum_regs->reg[27].r, 0x2aa); */ | |
296 | ||
297 | STORE_D2(0, (pinfo->total_vram == 0x100000 ? | |
298 | init->dacula_ctrl[cmode] & 0xf : | |
299 | init->dacula_ctrl[cmode])); | |
300 | STORE_D2(1, 4); | |
301 | STORE_D2(2, 0); | |
302 | ||
303 | set_platinum_clock(pinfo); | |
304 | ||
305 | out_be32(&platinum_regs->reg[24].r, 0); /* turn display on */ | |
306 | } | |
307 | ||
308 | /* | |
309 | * Set misc info vars for this driver | |
310 | */ | |
311 | static void __devinit platinum_init_info(struct fb_info *info, struct fb_info_platinum *pinfo) | |
312 | { | |
313 | /* Fill fb_info */ | |
314 | info->fbops = &platinumfb_ops; | |
315 | info->pseudo_palette = pinfo->pseudo_palette; | |
316 | info->flags = FBINFO_DEFAULT; | |
317 | info->screen_base = pinfo->frame_buffer + 0x20; | |
318 | ||
319 | fb_alloc_cmap(&info->cmap, 256, 0); | |
320 | ||
321 | /* Fill fix common fields */ | |
322 | strcpy(info->fix.id, "platinum"); | |
323 | info->fix.mmio_start = pinfo->platinum_regs_phys; | |
324 | info->fix.mmio_len = 0x1000; | |
325 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
326 | info->fix.smem_start = pinfo->frame_buffer_phys + 0x20; /* will be updated later */ | |
327 | info->fix.smem_len = pinfo->total_vram - 0x20; | |
328 | info->fix.ywrapstep = 0; | |
329 | info->fix.xpanstep = 0; | |
330 | info->fix.ypanstep = 0; | |
331 | info->fix.type_aux = 0; | |
332 | info->fix.accel = FB_ACCEL_NONE; | |
333 | } | |
334 | ||
335 | ||
336 | static int __devinit platinum_init_fb(struct fb_info *info) | |
337 | { | |
338 | struct fb_info_platinum *pinfo = info->par; | |
339 | struct fb_var_screeninfo var; | |
340 | int sense, rc; | |
341 | ||
342 | sense = read_platinum_sense(pinfo); | |
343 | printk(KERN_INFO "platinumfb: Monitor sense value = 0x%x, ", sense); | |
1da177e4 | 344 | if (default_vmode == VMODE_NVRAM) { |
f3f6f9aa | 345 | #ifdef CONFIG_NVRAM |
1da177e4 LT |
346 | default_vmode = nvram_read_byte(NV_VMODE); |
347 | if (default_vmode <= 0 || default_vmode > VMODE_MAX || | |
348 | !platinum_reg_init[default_vmode-1]) | |
f3f6f9aa | 349 | #endif |
1da177e4 LT |
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; | |
f3f6f9aa | 357 | #ifdef CONFIG_NVRAM |
1da177e4 LT |
358 | if (default_cmode == CMODE_NVRAM) |
359 | default_cmode = nvram_read_byte(NV_CMODE); | |
f3f6f9aa | 360 | #endif |
1da177e4 LT |
361 | if (default_cmode < CMODE_8 || default_cmode > CMODE_32) |
362 | default_cmode = CMODE_8; | |
363 | /* | |
364 | * Reduce the pixel size if we don't have enough VRAM. | |
365 | */ | |
366 | while(default_cmode > CMODE_8 && | |
367 | platinum_vram_reqd(default_vmode, default_cmode) > pinfo->total_vram) | |
368 | default_cmode--; | |
369 | ||
370 | printk("platinumfb: Using video mode %d and color mode %d.\n", default_vmode, default_cmode); | |
371 | ||
372 | /* Setup default var */ | |
373 | if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) { | |
374 | /* This shouldn't happen! */ | |
375 | printk("mac_vmode_to_var(%d, %d,) failed\n", default_vmode, default_cmode); | |
376 | try_again: | |
377 | default_vmode = VMODE_640_480_60; | |
378 | default_cmode = CMODE_8; | |
379 | if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) { | |
380 | printk(KERN_ERR "platinumfb: mac_vmode_to_var() failed\n"); | |
381 | return -ENXIO; | |
382 | } | |
383 | } | |
384 | ||
385 | /* Initialize info structure */ | |
386 | platinum_init_info(info, pinfo); | |
387 | ||
388 | /* Apply default var */ | |
389 | info->var = var; | |
390 | var.activate = FB_ACTIVATE_NOW; | |
391 | rc = fb_set_var(info, &var); | |
392 | if (rc && (default_vmode != VMODE_640_480_60 || default_cmode != CMODE_8)) | |
393 | goto try_again; | |
394 | ||
395 | /* Register with fbdev layer */ | |
396 | rc = register_framebuffer(info); | |
397 | if (rc < 0) | |
398 | return rc; | |
399 | ||
400 | printk(KERN_INFO "fb%d: Apple Platinum frame buffer device\n", info->node); | |
401 | ||
402 | return 0; | |
403 | } | |
404 | ||
405 | /* | |
406 | * Get the monitor sense value. | |
407 | * Note that this can be called before calibrate_delay, | |
408 | * so we can't use udelay. | |
409 | */ | |
410 | static int read_platinum_sense(struct fb_info_platinum *info) | |
411 | { | |
412 | volatile struct platinum_regs __iomem *platinum_regs = info->platinum_regs; | |
413 | int sense; | |
414 | ||
415 | out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */ | |
416 | __delay(2000); | |
417 | sense = (~in_be32(&platinum_regs->reg[23].r) & 7) << 8; | |
418 | ||
419 | /* drive each sense line low in turn and collect the other 2 */ | |
420 | out_be32(&platinum_regs->reg[23].r, 3); /* drive A low */ | |
421 | __delay(2000); | |
422 | sense |= (~in_be32(&platinum_regs->reg[23].r) & 3) << 4; | |
423 | out_be32(&platinum_regs->reg[23].r, 5); /* drive B low */ | |
424 | __delay(2000); | |
425 | sense |= (~in_be32(&platinum_regs->reg[23].r) & 4) << 1; | |
426 | sense |= (~in_be32(&platinum_regs->reg[23].r) & 1) << 2; | |
427 | out_be32(&platinum_regs->reg[23].r, 6); /* drive C low */ | |
428 | __delay(2000); | |
429 | sense |= (~in_be32(&platinum_regs->reg[23].r) & 6) >> 1; | |
430 | ||
431 | out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */ | |
432 | ||
433 | return sense; | |
434 | } | |
435 | ||
436 | /* | |
437 | * This routine takes a user-supplied var, and picks the best vmode/cmode from it. | |
438 | * It also updates the var structure to the actual mode data obtained | |
439 | */ | |
440 | static int platinum_var_to_par(struct fb_var_screeninfo *var, | |
441 | struct fb_info_platinum *pinfo, | |
442 | int check_only) | |
443 | { | |
444 | int vmode, cmode; | |
445 | ||
446 | if (mac_var_to_vmode(var, &vmode, &cmode) != 0) { | |
447 | printk(KERN_ERR "platinum_var_to_par: mac_var_to_vmode unsuccessful.\n"); | |
448 | printk(KERN_ERR "platinum_var_to_par: var->xres = %d\n", var->xres); | |
449 | printk(KERN_ERR "platinum_var_to_par: var->yres = %d\n", var->yres); | |
450 | printk(KERN_ERR "platinum_var_to_par: var->xres_virtual = %d\n", var->xres_virtual); | |
451 | printk(KERN_ERR "platinum_var_to_par: var->yres_virtual = %d\n", var->yres_virtual); | |
452 | printk(KERN_ERR "platinum_var_to_par: var->bits_per_pixel = %d\n", var->bits_per_pixel); | |
453 | printk(KERN_ERR "platinum_var_to_par: var->pixclock = %d\n", var->pixclock); | |
454 | printk(KERN_ERR "platinum_var_to_par: var->vmode = %d\n", var->vmode); | |
455 | return -EINVAL; | |
456 | } | |
457 | ||
458 | if (!platinum_reg_init[vmode-1]) { | |
459 | printk(KERN_ERR "platinum_var_to_par, vmode %d not valid.\n", vmode); | |
460 | return -EINVAL; | |
461 | } | |
462 | ||
463 | if (platinum_vram_reqd(vmode, cmode) > pinfo->total_vram) { | |
464 | printk(KERN_ERR "platinum_var_to_par, not enough ram for vmode %d, cmode %d.\n", vmode, cmode); | |
465 | return -EINVAL; | |
466 | } | |
467 | ||
468 | if (mac_vmode_to_var(vmode, cmode, var)) | |
469 | return -EINVAL; | |
470 | ||
471 | if (check_only) | |
472 | return 0; | |
473 | ||
474 | pinfo->vmode = vmode; | |
475 | pinfo->cmode = cmode; | |
476 | pinfo->xres = vmode_attrs[vmode-1].hres; | |
477 | pinfo->yres = vmode_attrs[vmode-1].vres; | |
478 | pinfo->xoffset = 0; | |
479 | pinfo->yoffset = 0; | |
480 | pinfo->vxres = pinfo->xres; | |
481 | pinfo->vyres = pinfo->yres; | |
482 | ||
483 | return 0; | |
484 | } | |
485 | ||
486 | ||
487 | /* | |
488 | * Parse user speficied options (`video=platinumfb:') | |
489 | */ | |
cc5d0189 | 490 | static int __init platinumfb_setup(char *options) |
1da177e4 LT |
491 | { |
492 | char *this_opt; | |
493 | ||
494 | if (!options || !*options) | |
495 | return 0; | |
496 | ||
497 | while ((this_opt = strsep(&options, ",")) != NULL) { | |
498 | if (!strncmp(this_opt, "vmode:", 6)) { | |
499 | int vmode = simple_strtoul(this_opt+6, NULL, 0); | |
500 | if (vmode > 0 && vmode <= VMODE_MAX) | |
501 | default_vmode = vmode; | |
502 | } else if (!strncmp(this_opt, "cmode:", 6)) { | |
503 | int depth = simple_strtoul(this_opt+6, NULL, 0); | |
504 | switch (depth) { | |
505 | case 0: | |
506 | case 8: | |
507 | default_cmode = CMODE_8; | |
508 | break; | |
509 | case 15: | |
510 | case 16: | |
511 | default_cmode = CMODE_16; | |
512 | break; | |
513 | case 24: | |
514 | case 32: | |
515 | default_cmode = CMODE_32; | |
516 | break; | |
517 | } | |
518 | } | |
519 | } | |
520 | return 0; | |
521 | } | |
522 | ||
523 | #ifdef __powerpc__ | |
524 | #define invalidate_cache(addr) \ | |
525 | asm volatile("eieio; dcbf 0,%1" \ | |
526 | : "=m" (*(addr)) : "r" (addr) : "memory"); | |
527 | #else | |
528 | #define invalidate_cache(addr) | |
529 | #endif | |
530 | ||
cc5d0189 BH |
531 | static int __devinit platinumfb_probe(struct of_device* odev, |
532 | const struct of_device_id *match) | |
1da177e4 LT |
533 | { |
534 | struct device_node *dp = odev->node; | |
535 | struct fb_info *info; | |
536 | struct fb_info_platinum *pinfo; | |
1da177e4 | 537 | volatile __u8 *fbuffer; |
cc5d0189 | 538 | int bank0, bank1, bank2, bank3, rc; |
1da177e4 | 539 | |
4c2a54b0 | 540 | dev_info(&odev->dev, "Found Apple Platinum video hardware\n"); |
1da177e4 LT |
541 | |
542 | info = framebuffer_alloc(sizeof(*pinfo), &odev->dev); | |
4c2a54b0 BH |
543 | if (info == NULL) { |
544 | dev_err(&odev->dev, "Failed to allocate fbdev !\n"); | |
1da177e4 | 545 | return -ENOMEM; |
4c2a54b0 | 546 | } |
1da177e4 LT |
547 | pinfo = info->par; |
548 | ||
cc5d0189 BH |
549 | if (of_address_to_resource(dp, 0, &pinfo->rsrc_reg) || |
550 | of_address_to_resource(dp, 1, &pinfo->rsrc_fb)) { | |
4c2a54b0 | 551 | dev_err(&odev->dev, "Can't get resources\n"); |
cc5d0189 BH |
552 | framebuffer_release(info); |
553 | return -ENXIO; | |
554 | } | |
4c2a54b0 BH |
555 | dev_dbg(&odev->dev, " registers : 0x%llx...0x%llx\n", |
556 | (unsigned long long)pinfo->rsrc_reg.start, | |
557 | (unsigned long long)pinfo->rsrc_reg.end); | |
558 | dev_dbg(&odev->dev, " framebuffer: 0x%llx...0x%llx\n", | |
559 | (unsigned long long)pinfo->rsrc_fb.start, | |
560 | (unsigned long long)pinfo->rsrc_fb.end); | |
561 | ||
562 | /* Do not try to request register space, they overlap with the | |
563 | * northbridge and that can fail. Only request framebuffer | |
564 | */ | |
cc5d0189 | 565 | if (!request_mem_region(pinfo->rsrc_fb.start, |
4c2a54b0 | 566 | pinfo->rsrc_fb.end - pinfo->rsrc_fb.start + 1, |
cc5d0189 | 567 | "platinumfb framebuffer")) { |
4c2a54b0 | 568 | printk(KERN_ERR "platinumfb: Can't request framebuffer !\n"); |
cc5d0189 BH |
569 | framebuffer_release(info); |
570 | return -ENXIO; | |
571 | } | |
572 | ||
573 | /* frame buffer - map only 4MB */ | |
574 | pinfo->frame_buffer_phys = pinfo->rsrc_fb.start; | |
575 | pinfo->frame_buffer = __ioremap(pinfo->rsrc_fb.start, 0x400000, | |
576 | _PAGE_WRITETHRU); | |
577 | pinfo->base_frame_buffer = pinfo->frame_buffer; | |
578 | ||
579 | /* registers */ | |
580 | pinfo->platinum_regs_phys = pinfo->rsrc_reg.start; | |
581 | pinfo->platinum_regs = ioremap(pinfo->rsrc_reg.start, 0x1000); | |
1da177e4 LT |
582 | |
583 | pinfo->cmap_regs_phys = 0xf301b000; /* XXX not in prom? */ | |
584 | request_mem_region(pinfo->cmap_regs_phys, 0x1000, "platinumfb cmap"); | |
585 | pinfo->cmap_regs = ioremap(pinfo->cmap_regs_phys, 0x1000); | |
586 | ||
587 | /* Grok total video ram */ | |
588 | out_be32(&pinfo->platinum_regs->reg[16].r, (unsigned)pinfo->frame_buffer_phys); | |
589 | out_be32(&pinfo->platinum_regs->reg[20].r, 0x1011); /* select max vram */ | |
590 | out_be32(&pinfo->platinum_regs->reg[24].r, 0); /* switch in vram */ | |
591 | ||
592 | fbuffer = pinfo->base_frame_buffer; | |
593 | fbuffer[0x100000] = 0x34; | |
594 | fbuffer[0x100008] = 0x0; | |
595 | invalidate_cache(&fbuffer[0x100000]); | |
596 | fbuffer[0x200000] = 0x56; | |
597 | fbuffer[0x200008] = 0x0; | |
598 | invalidate_cache(&fbuffer[0x200000]); | |
599 | fbuffer[0x300000] = 0x78; | |
600 | fbuffer[0x300008] = 0x0; | |
601 | invalidate_cache(&fbuffer[0x300000]); | |
602 | bank0 = 1; /* builtin 1MB vram, always there */ | |
603 | bank1 = fbuffer[0x100000] == 0x34; | |
604 | bank2 = fbuffer[0x200000] == 0x56; | |
605 | bank3 = fbuffer[0x300000] == 0x78; | |
606 | pinfo->total_vram = (bank0 + bank1 + bank2 + bank3) * 0x100000; | |
4c2a54b0 BH |
607 | printk(KERN_INFO "platinumfb: Total VRAM = %dMB (%d%d%d%d)\n", |
608 | (unsigned int) (pinfo->total_vram / 1024 / 1024), | |
1da177e4 LT |
609 | bank3, bank2, bank1, bank0); |
610 | ||
611 | /* | |
612 | * Try to determine whether we have an old or a new DACula. | |
613 | */ | |
614 | out_8(&pinfo->cmap_regs->addr, 0x40); | |
615 | pinfo->dactype = in_8(&pinfo->cmap_regs->d2); | |
616 | switch (pinfo->dactype) { | |
617 | case 0x3c: | |
618 | pinfo->clktype = 1; | |
619 | printk(KERN_INFO "platinumfb: DACula type 0x3c\n"); | |
620 | break; | |
621 | case 0x84: | |
622 | pinfo->clktype = 0; | |
623 | printk(KERN_INFO "platinumfb: DACula type 0x84\n"); | |
624 | break; | |
625 | default: | |
626 | pinfo->clktype = 0; | |
627 | printk(KERN_INFO "platinumfb: Unknown DACula type: %x\n", pinfo->dactype); | |
628 | break; | |
629 | } | |
630 | dev_set_drvdata(&odev->dev, info); | |
631 | ||
632 | rc = platinum_init_fb(info); | |
633 | if (rc != 0) { | |
2b7574da AL |
634 | iounmap(pinfo->frame_buffer); |
635 | iounmap(pinfo->platinum_regs); | |
636 | iounmap(pinfo->cmap_regs); | |
1da177e4 LT |
637 | dev_set_drvdata(&odev->dev, NULL); |
638 | framebuffer_release(info); | |
639 | } | |
640 | ||
641 | return rc; | |
642 | } | |
643 | ||
644 | static int __devexit platinumfb_remove(struct of_device* odev) | |
645 | { | |
646 | struct fb_info *info = dev_get_drvdata(&odev->dev); | |
647 | struct fb_info_platinum *pinfo = info->par; | |
1da177e4 LT |
648 | |
649 | unregister_framebuffer (info); | |
650 | ||
651 | /* Unmap frame buffer and registers */ | |
4c2a54b0 BH |
652 | iounmap(pinfo->frame_buffer); |
653 | iounmap(pinfo->platinum_regs); | |
654 | iounmap(pinfo->cmap_regs); | |
655 | ||
cc5d0189 BH |
656 | release_mem_region(pinfo->rsrc_fb.start, |
657 | pinfo->rsrc_fb.end - | |
658 | pinfo->rsrc_fb.start + 1); | |
4c2a54b0 | 659 | |
1da177e4 | 660 | release_mem_region(pinfo->cmap_regs_phys, 0x1000); |
1da177e4 LT |
661 | |
662 | framebuffer_release(info); | |
663 | ||
664 | return 0; | |
665 | } | |
666 | ||
5e655772 | 667 | static struct of_device_id platinumfb_match[] = |
1da177e4 LT |
668 | { |
669 | { | |
670 | .name = "platinum", | |
1da177e4 LT |
671 | }, |
672 | {}, | |
673 | }; | |
674 | ||
675 | static struct of_platform_driver platinum_driver = | |
676 | { | |
677 | .name = "platinumfb", | |
678 | .match_table = platinumfb_match, | |
679 | .probe = platinumfb_probe, | |
680 | .remove = platinumfb_remove, | |
681 | }; | |
682 | ||
cc5d0189 | 683 | static int __init platinumfb_init(void) |
1da177e4 LT |
684 | { |
685 | #ifndef MODULE | |
686 | char *option = NULL; | |
687 | ||
688 | if (fb_get_options("platinumfb", &option)) | |
689 | return -ENODEV; | |
690 | platinumfb_setup(option); | |
691 | #endif | |
7eebde70 | 692 | of_register_platform_driver(&platinum_driver); |
1da177e4 LT |
693 | |
694 | return 0; | |
695 | } | |
696 | ||
cc5d0189 | 697 | static void __exit platinumfb_exit(void) |
1da177e4 | 698 | { |
7eebde70 | 699 | of_unregister_platform_driver(&platinum_driver); |
1da177e4 LT |
700 | } |
701 | ||
702 | MODULE_LICENSE("GPL"); | |
703 | MODULE_DESCRIPTION("framebuffer driver for Apple Platinum video"); | |
704 | module_init(platinumfb_init); | |
705 | ||
706 | #ifdef MODULE | |
707 | module_exit(platinumfb_exit); | |
708 | #endif |