Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* cg3.c: CGTHREE frame buffer driver |
2 | * | |
50312ce9 | 3 | * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net) |
1da177e4 LT |
4 | * Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz) |
5 | * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx) | |
6 | * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be) | |
7 | * | |
8 | * Driver layout based loosely on tgafb.c, see that file for credits. | |
9 | */ | |
10 | ||
11 | #include <linux/module.h> | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/errno.h> | |
14 | #include <linux/string.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/delay.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/fb.h> | |
19 | #include <linux/mm.h> | |
20 | ||
21 | #include <asm/io.h> | |
1da177e4 | 22 | #include <asm/oplib.h> |
50312ce9 DM |
23 | #include <asm/prom.h> |
24 | #include <asm/of_device.h> | |
1da177e4 LT |
25 | #include <asm/fbio.h> |
26 | ||
27 | #include "sbuslib.h" | |
28 | ||
29 | /* | |
30 | * Local functions. | |
31 | */ | |
32 | ||
33 | static int cg3_setcolreg(unsigned, unsigned, unsigned, unsigned, | |
34 | unsigned, struct fb_info *); | |
35 | static int cg3_blank(int, struct fb_info *); | |
36 | ||
216d526c | 37 | static int cg3_mmap(struct fb_info *, struct vm_area_struct *); |
67a6680d | 38 | static int cg3_ioctl(struct fb_info *, unsigned int, unsigned long); |
1da177e4 LT |
39 | |
40 | /* | |
41 | * Frame buffer operations | |
42 | */ | |
43 | ||
44 | static struct fb_ops cg3_ops = { | |
45 | .owner = THIS_MODULE, | |
46 | .fb_setcolreg = cg3_setcolreg, | |
47 | .fb_blank = cg3_blank, | |
48 | .fb_fillrect = cfb_fillrect, | |
49 | .fb_copyarea = cfb_copyarea, | |
50 | .fb_imageblit = cfb_imageblit, | |
51 | .fb_mmap = cg3_mmap, | |
52 | .fb_ioctl = cg3_ioctl, | |
9ffb83bc CH |
53 | #ifdef CONFIG_COMPAT |
54 | .fb_compat_ioctl = sbusfb_compat_ioctl, | |
55 | #endif | |
1da177e4 LT |
56 | }; |
57 | ||
58 | ||
59 | /* Control Register Constants */ | |
60 | #define CG3_CR_ENABLE_INTS 0x80 | |
61 | #define CG3_CR_ENABLE_VIDEO 0x40 | |
62 | #define CG3_CR_ENABLE_TIMING 0x20 | |
63 | #define CG3_CR_ENABLE_CURCMP 0x10 | |
64 | #define CG3_CR_XTAL_MASK 0x0c | |
65 | #define CG3_CR_DIVISOR_MASK 0x03 | |
66 | ||
67 | /* Status Register Constants */ | |
68 | #define CG3_SR_PENDING_INT 0x80 | |
69 | #define CG3_SR_RES_MASK 0x70 | |
70 | #define CG3_SR_1152_900_76_A 0x40 | |
71 | #define CG3_SR_1152_900_76_B 0x60 | |
72 | #define CG3_SR_ID_MASK 0x0f | |
73 | #define CG3_SR_ID_COLOR 0x01 | |
74 | #define CG3_SR_ID_MONO 0x02 | |
75 | #define CG3_SR_ID_MONO_ECL 0x03 | |
76 | ||
77 | enum cg3_type { | |
78 | CG3_AT_66HZ = 0, | |
79 | CG3_AT_76HZ, | |
80 | CG3_RDI | |
81 | }; | |
82 | ||
83 | struct bt_regs { | |
50312ce9 DM |
84 | u32 addr; |
85 | u32 color_map; | |
86 | u32 control; | |
87 | u32 cursor; | |
1da177e4 LT |
88 | }; |
89 | ||
90 | struct cg3_regs { | |
91 | struct bt_regs cmap; | |
50312ce9 DM |
92 | u8 control; |
93 | u8 status; | |
94 | u8 cursor_start; | |
95 | u8 cursor_end; | |
96 | u8 h_blank_start; | |
97 | u8 h_blank_end; | |
98 | u8 h_sync_start; | |
99 | u8 h_sync_end; | |
100 | u8 comp_sync_end; | |
101 | u8 v_blank_start_high; | |
102 | u8 v_blank_start_low; | |
103 | u8 v_blank_end; | |
104 | u8 v_sync_start; | |
105 | u8 v_sync_end; | |
106 | u8 xfer_holdoff_start; | |
107 | u8 xfer_holdoff_end; | |
1da177e4 LT |
108 | }; |
109 | ||
110 | /* Offset of interesting structures in the OBIO space */ | |
111 | #define CG3_REGS_OFFSET 0x400000UL | |
112 | #define CG3_RAM_OFFSET 0x800000UL | |
113 | ||
114 | struct cg3_par { | |
115 | spinlock_t lock; | |
116 | struct cg3_regs __iomem *regs; | |
117 | u32 sw_cmap[((256 * 3) + 3) / 4]; | |
118 | ||
119 | u32 flags; | |
120 | #define CG3_FLAG_BLANKED 0x00000001 | |
121 | #define CG3_FLAG_RDI 0x00000002 | |
122 | ||
123 | unsigned long physbase; | |
50312ce9 | 124 | unsigned long which_io; |
1da177e4 | 125 | unsigned long fbsize; |
1da177e4 LT |
126 | }; |
127 | ||
128 | /** | |
129 | * cg3_setcolreg - Optional function. Sets a color register. | |
130 | * @regno: boolean, 0 copy local, 1 get_user() function | |
131 | * @red: frame buffer colormap structure | |
132 | * @green: The green value which can be up to 16 bits wide | |
133 | * @blue: The blue value which can be up to 16 bits wide. | |
134 | * @transp: If supported the alpha value which can be up to 16 bits wide. | |
135 | * @info: frame buffer info structure | |
136 | * | |
137 | * The cg3 palette is loaded with 4 color values at each time | |
138 | * so you end up with: (rgb)(r), (gb)(rg), (b)(rgb), and so on. | |
139 | * We keep a sw copy of the hw cmap to assist us in this esoteric | |
140 | * loading procedure. | |
141 | */ | |
142 | static int cg3_setcolreg(unsigned regno, | |
143 | unsigned red, unsigned green, unsigned blue, | |
144 | unsigned transp, struct fb_info *info) | |
145 | { | |
146 | struct cg3_par *par = (struct cg3_par *) info->par; | |
147 | struct bt_regs __iomem *bt = &par->regs->cmap; | |
148 | unsigned long flags; | |
149 | u32 *p32; | |
150 | u8 *p8; | |
151 | int count; | |
152 | ||
153 | if (regno >= 256) | |
154 | return 1; | |
155 | ||
156 | red >>= 8; | |
157 | green >>= 8; | |
158 | blue >>= 8; | |
159 | ||
160 | spin_lock_irqsave(&par->lock, flags); | |
161 | ||
162 | p8 = (u8 *)par->sw_cmap + (regno * 3); | |
163 | p8[0] = red; | |
164 | p8[1] = green; | |
165 | p8[2] = blue; | |
166 | ||
167 | #define D4M3(x) ((((x)>>2)<<1) + ((x)>>2)) /* (x/4)*3 */ | |
168 | #define D4M4(x) ((x)&~0x3) /* (x/4)*4 */ | |
169 | ||
170 | count = 3; | |
171 | p32 = &par->sw_cmap[D4M3(regno)]; | |
172 | sbus_writel(D4M4(regno), &bt->addr); | |
173 | while (count--) | |
174 | sbus_writel(*p32++, &bt->color_map); | |
175 | ||
176 | #undef D4M3 | |
177 | #undef D4M4 | |
178 | ||
179 | spin_unlock_irqrestore(&par->lock, flags); | |
180 | ||
181 | return 0; | |
182 | } | |
183 | ||
184 | /** | |
185 | * cg3_blank - Optional function. Blanks the display. | |
186 | * @blank_mode: the blank mode we want. | |
187 | * @info: frame buffer structure that represents a single frame buffer | |
188 | */ | |
a7177514 | 189 | static int cg3_blank(int blank, struct fb_info *info) |
1da177e4 LT |
190 | { |
191 | struct cg3_par *par = (struct cg3_par *) info->par; | |
192 | struct cg3_regs __iomem *regs = par->regs; | |
193 | unsigned long flags; | |
194 | u8 val; | |
195 | ||
196 | spin_lock_irqsave(&par->lock, flags); | |
197 | ||
198 | switch (blank) { | |
199 | case FB_BLANK_UNBLANK: /* Unblanking */ | |
200 | val = sbus_readb(®s->control); | |
201 | val |= CG3_CR_ENABLE_VIDEO; | |
202 | sbus_writeb(val, ®s->control); | |
203 | par->flags &= ~CG3_FLAG_BLANKED; | |
204 | break; | |
205 | ||
206 | case FB_BLANK_NORMAL: /* Normal blanking */ | |
207 | case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */ | |
208 | case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */ | |
209 | case FB_BLANK_POWERDOWN: /* Poweroff */ | |
210 | val = sbus_readb(®s->control); | |
211 | val &= ~CG3_CR_ENABLE_VIDEO; | |
212 | sbus_writeb(val, ®s->control); | |
213 | par->flags |= CG3_FLAG_BLANKED; | |
214 | break; | |
215 | } | |
216 | ||
217 | spin_unlock_irqrestore(&par->lock, flags); | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
222 | static struct sbus_mmap_map cg3_mmap_map[] = { | |
223 | { | |
224 | .voff = CG3_MMAP_OFFSET, | |
225 | .poff = CG3_RAM_OFFSET, | |
226 | .size = SBUS_MMAP_FBSIZE(1) | |
227 | }, | |
228 | { .size = 0 } | |
229 | }; | |
230 | ||
216d526c | 231 | static int cg3_mmap(struct fb_info *info, struct vm_area_struct *vma) |
1da177e4 LT |
232 | { |
233 | struct cg3_par *par = (struct cg3_par *)info->par; | |
234 | ||
235 | return sbusfb_mmap_helper(cg3_mmap_map, | |
236 | par->physbase, par->fbsize, | |
50312ce9 | 237 | par->which_io, |
1da177e4 LT |
238 | vma); |
239 | } | |
240 | ||
67a6680d | 241 | static int cg3_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
242 | { |
243 | struct cg3_par *par = (struct cg3_par *) info->par; | |
244 | ||
245 | return sbusfb_ioctl_helper(cmd, arg, info, | |
246 | FBTYPE_SUN3COLOR, 8, par->fbsize); | |
247 | } | |
248 | ||
249 | /* | |
250 | * Initialisation | |
251 | */ | |
252 | ||
a7177514 RR |
253 | static void __devinit cg3_init_fix(struct fb_info *info, int linebytes, |
254 | struct device_node *dp) | |
1da177e4 | 255 | { |
50312ce9 | 256 | strlcpy(info->fix.id, dp->name, sizeof(info->fix.id)); |
1da177e4 LT |
257 | |
258 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
259 | info->fix.visual = FB_VISUAL_PSEUDOCOLOR; | |
260 | ||
261 | info->fix.line_length = linebytes; | |
262 | ||
263 | info->fix.accel = FB_ACCEL_SUN_CGTHREE; | |
264 | } | |
265 | ||
a7177514 RR |
266 | static void __devinit cg3_rdi_maybe_fixup_var(struct fb_var_screeninfo *var, |
267 | struct device_node *dp) | |
1da177e4 | 268 | { |
ccf0dec6 | 269 | const char *params; |
1da177e4 LT |
270 | char *p; |
271 | int ww, hh; | |
272 | ||
50312ce9 DM |
273 | params = of_get_property(dp, "params", NULL); |
274 | if (params) { | |
275 | ww = simple_strtoul(params, &p, 10); | |
1da177e4 LT |
276 | if (ww && *p == 'x') { |
277 | hh = simple_strtoul(p + 1, &p, 10); | |
278 | if (hh && *p == '-') { | |
279 | if (var->xres != ww || | |
280 | var->yres != hh) { | |
281 | var->xres = var->xres_virtual = ww; | |
282 | var->yres = var->yres_virtual = hh; | |
283 | } | |
284 | } | |
285 | } | |
286 | } | |
287 | } | |
288 | ||
a7177514 | 289 | static u8 cg3regvals_66hz[] __devinitdata = { /* 1152 x 900, 66 Hz */ |
1da177e4 LT |
290 | 0x14, 0xbb, 0x15, 0x2b, 0x16, 0x04, 0x17, 0x14, |
291 | 0x18, 0xae, 0x19, 0x03, 0x1a, 0xa8, 0x1b, 0x24, | |
292 | 0x1c, 0x01, 0x1d, 0x05, 0x1e, 0xff, 0x1f, 0x01, | |
293 | 0x10, 0x20, 0 | |
294 | }; | |
295 | ||
a7177514 | 296 | static u8 cg3regvals_76hz[] __devinitdata = { /* 1152 x 900, 76 Hz */ |
1da177e4 LT |
297 | 0x14, 0xb7, 0x15, 0x27, 0x16, 0x03, 0x17, 0x0f, |
298 | 0x18, 0xae, 0x19, 0x03, 0x1a, 0xae, 0x1b, 0x2a, | |
299 | 0x1c, 0x01, 0x1d, 0x09, 0x1e, 0xff, 0x1f, 0x01, | |
300 | 0x10, 0x24, 0 | |
301 | }; | |
302 | ||
a7177514 | 303 | static u8 cg3regvals_rdi[] __devinitdata = { /* 640 x 480, cgRDI */ |
1da177e4 LT |
304 | 0x14, 0x70, 0x15, 0x20, 0x16, 0x08, 0x17, 0x10, |
305 | 0x18, 0x06, 0x19, 0x02, 0x1a, 0x31, 0x1b, 0x51, | |
306 | 0x1c, 0x06, 0x1d, 0x0c, 0x1e, 0xff, 0x1f, 0x01, | |
307 | 0x10, 0x22, 0 | |
308 | }; | |
309 | ||
a7177514 | 310 | static u8 *cg3_regvals[] __devinitdata = { |
1da177e4 LT |
311 | cg3regvals_66hz, cg3regvals_76hz, cg3regvals_rdi |
312 | }; | |
313 | ||
a7177514 | 314 | static u_char cg3_dacvals[] __devinitdata = { |
1da177e4 LT |
315 | 4, 0xff, 5, 0x00, 6, 0x70, 7, 0x00, 0 |
316 | }; | |
317 | ||
6c8f5b90 | 318 | static int __devinit cg3_do_default_mode(struct cg3_par *par) |
1da177e4 LT |
319 | { |
320 | enum cg3_type type; | |
321 | u8 *p; | |
322 | ||
323 | if (par->flags & CG3_FLAG_RDI) | |
324 | type = CG3_RDI; | |
325 | else { | |
326 | u8 status = sbus_readb(&par->regs->status), mon; | |
327 | if ((status & CG3_SR_ID_MASK) == CG3_SR_ID_COLOR) { | |
328 | mon = status & CG3_SR_RES_MASK; | |
329 | if (mon == CG3_SR_1152_900_76_A || | |
330 | mon == CG3_SR_1152_900_76_B) | |
331 | type = CG3_AT_76HZ; | |
332 | else | |
333 | type = CG3_AT_66HZ; | |
334 | } else { | |
6c8f5b90 DM |
335 | printk(KERN_ERR "cgthree: can't handle SR %02x\n", |
336 | status); | |
337 | return -EINVAL; | |
1da177e4 LT |
338 | } |
339 | } | |
340 | ||
341 | for (p = cg3_regvals[type]; *p; p += 2) { | |
342 | u8 __iomem *regp = &((u8 __iomem *)par->regs)[p[0]]; | |
343 | sbus_writeb(p[1], regp); | |
344 | } | |
345 | for (p = cg3_dacvals; *p; p += 2) { | |
50312ce9 | 346 | u8 __iomem *regp; |
1da177e4 | 347 | |
50312ce9 | 348 | regp = (u8 __iomem *)&par->regs->cmap.addr; |
1da177e4 | 349 | sbus_writeb(p[0], regp); |
50312ce9 | 350 | regp = (u8 __iomem *)&par->regs->cmap.control; |
1da177e4 LT |
351 | sbus_writeb(p[1], regp); |
352 | } | |
6c8f5b90 | 353 | return 0; |
1da177e4 LT |
354 | } |
355 | ||
c7f439b9 DM |
356 | static int __devinit cg3_probe(struct of_device *op, |
357 | const struct of_device_id *match) | |
1da177e4 | 358 | { |
50312ce9 | 359 | struct device_node *dp = op->node; |
c7f439b9 DM |
360 | struct fb_info *info; |
361 | struct cg3_par *par; | |
50312ce9 | 362 | int linebytes, err; |
1da177e4 | 363 | |
c7f439b9 | 364 | info = framebuffer_alloc(sizeof(struct cg3_par), &op->dev); |
1da177e4 | 365 | |
c7f439b9 DM |
366 | err = -ENOMEM; |
367 | if (!info) | |
368 | goto out_err; | |
369 | par = info->par; | |
1da177e4 | 370 | |
c7f439b9 | 371 | spin_lock_init(&par->lock); |
1da177e4 | 372 | |
c7f439b9 DM |
373 | par->physbase = op->resource[0].start; |
374 | par->which_io = op->resource[0].flags & IORESOURCE_BITS; | |
375 | ||
376 | sbusfb_fill_var(&info->var, dp->node, 8); | |
377 | info->var.red.length = 8; | |
378 | info->var.green.length = 8; | |
379 | info->var.blue.length = 8; | |
50312ce9 | 380 | if (!strcmp(dp->name, "cgRDI")) |
c7f439b9 DM |
381 | par->flags |= CG3_FLAG_RDI; |
382 | if (par->flags & CG3_FLAG_RDI) | |
383 | cg3_rdi_maybe_fixup_var(&info->var, dp); | |
1da177e4 | 384 | |
50312ce9 | 385 | linebytes = of_getintprop_default(dp, "linebytes", |
c7f439b9 DM |
386 | info->var.xres); |
387 | par->fbsize = PAGE_ALIGN(linebytes * info->var.yres); | |
1da177e4 | 388 | |
c7f439b9 DM |
389 | par->regs = of_ioremap(&op->resource[0], CG3_REGS_OFFSET, |
390 | sizeof(struct cg3_regs), "cg3 regs"); | |
391 | if (!par->regs) | |
392 | goto out_release_fb; | |
1da177e4 | 393 | |
c7f439b9 DM |
394 | info->flags = FBINFO_DEFAULT; |
395 | info->fbops = &cg3_ops; | |
396 | info->screen_base = of_ioremap(&op->resource[0], CG3_RAM_OFFSET, | |
397 | par->fbsize, "cg3 ram"); | |
398 | if (!info->screen_base) | |
399 | goto out_unmap_regs; | |
1da177e4 | 400 | |
c7f439b9 | 401 | cg3_blank(0, info); |
1da177e4 | 402 | |
6c8f5b90 DM |
403 | if (!of_find_property(dp, "width", NULL)) { |
404 | err = cg3_do_default_mode(par); | |
405 | if (err) | |
406 | goto out_unmap_screen; | |
407 | } | |
c7f439b9 DM |
408 | |
409 | if (fb_alloc_cmap(&info->cmap, 256, 0)) | |
410 | goto out_unmap_screen; | |
411 | ||
412 | fb_set_cmap(&info->cmap, info); | |
1da177e4 | 413 | |
c7f439b9 DM |
414 | cg3_init_fix(info, linebytes, dp); |
415 | ||
416 | err = register_framebuffer(info); | |
417 | if (err < 0) | |
418 | goto out_dealloc_cmap; | |
419 | ||
420 | dev_set_drvdata(&op->dev, info); | |
50312ce9 DM |
421 | |
422 | printk("%s: cg3 at %lx:%lx\n", | |
c7f439b9 | 423 | dp->full_name, par->which_io, par->physbase); |
1da177e4 | 424 | |
50312ce9 | 425 | return 0; |
1da177e4 | 426 | |
c7f439b9 DM |
427 | out_dealloc_cmap: |
428 | fb_dealloc_cmap(&info->cmap); | |
429 | ||
430 | out_unmap_screen: | |
431 | of_iounmap(&op->resource[0], info->screen_base, par->fbsize); | |
432 | ||
433 | out_unmap_regs: | |
434 | of_iounmap(&op->resource[0], par->regs, sizeof(struct cg3_regs)); | |
435 | ||
436 | out_release_fb: | |
437 | framebuffer_release(info); | |
1da177e4 | 438 | |
c7f439b9 DM |
439 | out_err: |
440 | return err; | |
50312ce9 | 441 | } |
1da177e4 | 442 | |
e3a411a3 | 443 | static int __devexit cg3_remove(struct of_device *op) |
50312ce9 | 444 | { |
c7f439b9 DM |
445 | struct fb_info *info = dev_get_drvdata(&op->dev); |
446 | struct cg3_par *par = info->par; | |
50312ce9 | 447 | |
c7f439b9 DM |
448 | unregister_framebuffer(info); |
449 | fb_dealloc_cmap(&info->cmap); | |
50312ce9 | 450 | |
c7f439b9 DM |
451 | of_iounmap(&op->resource[0], par->regs, sizeof(struct cg3_regs)); |
452 | of_iounmap(&op->resource[0], info->screen_base, par->fbsize); | |
50312ce9 | 453 | |
c7f439b9 | 454 | framebuffer_release(info); |
50312ce9 | 455 | |
e3a411a3 | 456 | dev_set_drvdata(&op->dev, NULL); |
1da177e4 LT |
457 | |
458 | return 0; | |
459 | } | |
460 | ||
50312ce9 DM |
461 | static struct of_device_id cg3_match[] = { |
462 | { | |
463 | .name = "cgthree", | |
464 | }, | |
465 | { | |
466 | .name = "cgRDI", | |
467 | }, | |
468 | {}, | |
469 | }; | |
470 | MODULE_DEVICE_TABLE(of, cg3_match); | |
1da177e4 | 471 | |
50312ce9 DM |
472 | static struct of_platform_driver cg3_driver = { |
473 | .name = "cg3", | |
474 | .match_table = cg3_match, | |
475 | .probe = cg3_probe, | |
476 | .remove = __devexit_p(cg3_remove), | |
477 | }; | |
1da177e4 | 478 | |
50312ce9 DM |
479 | static int __init cg3_init(void) |
480 | { | |
481 | if (fb_get_options("cg3fb", NULL)) | |
482 | return -ENODEV; | |
483 | ||
484 | return of_register_driver(&cg3_driver, &of_bus_type); | |
1da177e4 LT |
485 | } |
486 | ||
50312ce9 | 487 | static void __exit cg3_exit(void) |
1da177e4 | 488 | { |
50312ce9 | 489 | of_unregister_driver(&cg3_driver); |
1da177e4 LT |
490 | } |
491 | ||
492 | module_init(cg3_init); | |
1da177e4 | 493 | module_exit(cg3_exit); |
1da177e4 LT |
494 | |
495 | MODULE_DESCRIPTION("framebuffer driver for CGthree chipsets"); | |
50312ce9 DM |
496 | MODULE_AUTHOR("David S. Miller <davem@davemloft.net>"); |
497 | MODULE_VERSION("2.0"); | |
1da177e4 | 498 | MODULE_LICENSE("GPL"); |