Commit | Line | Data |
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1da177e4 LT |
1 | /* bw2.c: BWTWO 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> | |
6cd5a86b | 20 | #include <linux/of_device.h> |
1da177e4 LT |
21 | |
22 | #include <asm/io.h> | |
1da177e4 LT |
23 | #include <asm/fbio.h> |
24 | ||
1da177e4 LT |
25 | #include "sbuslib.h" |
26 | ||
27 | /* | |
28 | * Local functions. | |
29 | */ | |
30 | ||
31 | static int bw2_blank(int, struct fb_info *); | |
32 | ||
216d526c | 33 | static int bw2_mmap(struct fb_info *, struct vm_area_struct *); |
67a6680d | 34 | static int bw2_ioctl(struct fb_info *, unsigned int, unsigned long); |
1da177e4 LT |
35 | |
36 | /* | |
37 | * Frame buffer operations | |
38 | */ | |
39 | ||
40 | static struct fb_ops bw2_ops = { | |
41 | .owner = THIS_MODULE, | |
42 | .fb_blank = bw2_blank, | |
43 | .fb_fillrect = cfb_fillrect, | |
44 | .fb_copyarea = cfb_copyarea, | |
45 | .fb_imageblit = cfb_imageblit, | |
46 | .fb_mmap = bw2_mmap, | |
47 | .fb_ioctl = bw2_ioctl, | |
9ffb83bc CH |
48 | #ifdef CONFIG_COMPAT |
49 | .fb_compat_ioctl = sbusfb_compat_ioctl, | |
50 | #endif | |
1da177e4 LT |
51 | }; |
52 | ||
53 | /* OBio addresses for the bwtwo registers */ | |
54 | #define BWTWO_REGISTER_OFFSET 0x400000 | |
55 | ||
56 | struct bt_regs { | |
50312ce9 DM |
57 | u32 addr; |
58 | u32 color_map; | |
59 | u32 control; | |
60 | u32 cursor; | |
1da177e4 LT |
61 | }; |
62 | ||
63 | struct bw2_regs { | |
64 | struct bt_regs cmap; | |
50312ce9 DM |
65 | u8 control; |
66 | u8 status; | |
67 | u8 cursor_start; | |
68 | u8 cursor_end; | |
69 | u8 h_blank_start; | |
70 | u8 h_blank_end; | |
71 | u8 h_sync_start; | |
72 | u8 h_sync_end; | |
73 | u8 comp_sync_end; | |
74 | u8 v_blank_start_high; | |
75 | u8 v_blank_start_low; | |
76 | u8 v_blank_end; | |
77 | u8 v_sync_start; | |
78 | u8 v_sync_end; | |
79 | u8 xfer_holdoff_start; | |
80 | u8 xfer_holdoff_end; | |
1da177e4 LT |
81 | }; |
82 | ||
83 | /* Status Register Constants */ | |
84 | #define BWTWO_SR_RES_MASK 0x70 | |
85 | #define BWTWO_SR_1600_1280 0x50 | |
86 | #define BWTWO_SR_1152_900_76_A 0x40 | |
87 | #define BWTWO_SR_1152_900_76_B 0x60 | |
88 | #define BWTWO_SR_ID_MASK 0x0f | |
89 | #define BWTWO_SR_ID_MONO 0x02 | |
90 | #define BWTWO_SR_ID_MONO_ECL 0x03 | |
91 | #define BWTWO_SR_ID_MSYNC 0x04 | |
92 | #define BWTWO_SR_ID_NOCONN 0x0a | |
93 | ||
94 | /* Control Register Constants */ | |
95 | #define BWTWO_CTL_ENABLE_INTS 0x80 | |
96 | #define BWTWO_CTL_ENABLE_VIDEO 0x40 | |
97 | #define BWTWO_CTL_ENABLE_TIMING 0x20 | |
98 | #define BWTWO_CTL_ENABLE_CURCMP 0x10 | |
99 | #define BWTWO_CTL_XTAL_MASK 0x0C | |
100 | #define BWTWO_CTL_DIVISOR_MASK 0x03 | |
101 | ||
102 | /* Status Register Constants */ | |
103 | #define BWTWO_STAT_PENDING_INT 0x80 | |
104 | #define BWTWO_STAT_MSENSE_MASK 0x70 | |
105 | #define BWTWO_STAT_ID_MASK 0x0f | |
106 | ||
107 | struct bw2_par { | |
108 | spinlock_t lock; | |
109 | struct bw2_regs __iomem *regs; | |
110 | ||
111 | u32 flags; | |
112 | #define BW2_FLAG_BLANKED 0x00000001 | |
113 | ||
114 | unsigned long physbase; | |
50312ce9 | 115 | unsigned long which_io; |
1da177e4 | 116 | unsigned long fbsize; |
1da177e4 LT |
117 | }; |
118 | ||
119 | /** | |
120 | * bw2_blank - Optional function. Blanks the display. | |
121 | * @blank_mode: the blank mode we want. | |
122 | * @info: frame buffer structure that represents a single frame buffer | |
123 | */ | |
124 | static int | |
125 | bw2_blank(int blank, struct fb_info *info) | |
126 | { | |
127 | struct bw2_par *par = (struct bw2_par *) info->par; | |
128 | struct bw2_regs __iomem *regs = par->regs; | |
129 | unsigned long flags; | |
130 | u8 val; | |
131 | ||
132 | spin_lock_irqsave(&par->lock, flags); | |
133 | ||
134 | switch (blank) { | |
135 | case FB_BLANK_UNBLANK: /* Unblanking */ | |
136 | val = sbus_readb(®s->control); | |
137 | val |= BWTWO_CTL_ENABLE_VIDEO; | |
138 | sbus_writeb(val, ®s->control); | |
139 | par->flags &= ~BW2_FLAG_BLANKED; | |
140 | break; | |
141 | ||
142 | case FB_BLANK_NORMAL: /* Normal blanking */ | |
143 | case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */ | |
144 | case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */ | |
145 | case FB_BLANK_POWERDOWN: /* Poweroff */ | |
146 | val = sbus_readb(®s->control); | |
147 | val &= ~BWTWO_CTL_ENABLE_VIDEO; | |
148 | sbus_writeb(val, ®s->control); | |
149 | par->flags |= BW2_FLAG_BLANKED; | |
150 | break; | |
151 | } | |
152 | ||
153 | spin_unlock_irqrestore(&par->lock, flags); | |
154 | ||
155 | return 0; | |
156 | } | |
157 | ||
158 | static struct sbus_mmap_map bw2_mmap_map[] = { | |
159 | { | |
160 | .size = SBUS_MMAP_FBSIZE(1) | |
161 | }, | |
162 | { .size = 0 } | |
163 | }; | |
164 | ||
216d526c | 165 | static int bw2_mmap(struct fb_info *info, struct vm_area_struct *vma) |
1da177e4 LT |
166 | { |
167 | struct bw2_par *par = (struct bw2_par *)info->par; | |
168 | ||
169 | return sbusfb_mmap_helper(bw2_mmap_map, | |
170 | par->physbase, par->fbsize, | |
50312ce9 | 171 | par->which_io, |
1da177e4 LT |
172 | vma); |
173 | } | |
174 | ||
67a6680d | 175 | static int bw2_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
176 | { |
177 | struct bw2_par *par = (struct bw2_par *) info->par; | |
178 | ||
179 | return sbusfb_ioctl_helper(cmd, arg, info, | |
180 | FBTYPE_SUN2BW, 1, par->fbsize); | |
181 | } | |
182 | ||
183 | /* | |
184 | * Initialisation | |
185 | */ | |
186 | ||
63abdcdc | 187 | static void __devinit bw2_init_fix(struct fb_info *info, int linebytes) |
1da177e4 LT |
188 | { |
189 | strlcpy(info->fix.id, "bwtwo", sizeof(info->fix.id)); | |
190 | ||
191 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
192 | info->fix.visual = FB_VISUAL_MONO01; | |
193 | ||
194 | info->fix.line_length = linebytes; | |
195 | ||
196 | info->fix.accel = FB_ACCEL_SUN_BWTWO; | |
197 | } | |
198 | ||
63abdcdc | 199 | static u8 bw2regs_1600[] __devinitdata = { |
1da177e4 LT |
200 | 0x14, 0x8b, 0x15, 0x28, 0x16, 0x03, 0x17, 0x13, |
201 | 0x18, 0x7b, 0x19, 0x05, 0x1a, 0x34, 0x1b, 0x2e, | |
202 | 0x1c, 0x00, 0x1d, 0x0a, 0x1e, 0xff, 0x1f, 0x01, | |
203 | 0x10, 0x21, 0 | |
204 | }; | |
205 | ||
63abdcdc | 206 | static u8 bw2regs_ecl[] __devinitdata = { |
1da177e4 LT |
207 | 0x14, 0x65, 0x15, 0x1e, 0x16, 0x04, 0x17, 0x0c, |
208 | 0x18, 0x5e, 0x19, 0x03, 0x1a, 0xa7, 0x1b, 0x23, | |
209 | 0x1c, 0x00, 0x1d, 0x08, 0x1e, 0xff, 0x1f, 0x01, | |
210 | 0x10, 0x20, 0 | |
211 | }; | |
212 | ||
63abdcdc | 213 | static u8 bw2regs_analog[] __devinitdata = { |
1da177e4 LT |
214 | 0x14, 0xbb, 0x15, 0x2b, 0x16, 0x03, 0x17, 0x13, |
215 | 0x18, 0xb0, 0x19, 0x03, 0x1a, 0xa6, 0x1b, 0x22, | |
216 | 0x1c, 0x01, 0x1d, 0x05, 0x1e, 0xff, 0x1f, 0x01, | |
217 | 0x10, 0x20, 0 | |
218 | }; | |
219 | ||
63abdcdc | 220 | static u8 bw2regs_76hz[] __devinitdata = { |
1da177e4 LT |
221 | 0x14, 0xb7, 0x15, 0x27, 0x16, 0x03, 0x17, 0x0f, |
222 | 0x18, 0xae, 0x19, 0x03, 0x1a, 0xae, 0x1b, 0x2a, | |
223 | 0x1c, 0x01, 0x1d, 0x09, 0x1e, 0xff, 0x1f, 0x01, | |
224 | 0x10, 0x24, 0 | |
225 | }; | |
226 | ||
63abdcdc | 227 | static u8 bw2regs_66hz[] __devinitdata = { |
1da177e4 LT |
228 | 0x14, 0xbb, 0x15, 0x2b, 0x16, 0x04, 0x17, 0x14, |
229 | 0x18, 0xae, 0x19, 0x03, 0x1a, 0xa8, 0x1b, 0x24, | |
230 | 0x1c, 0x01, 0x1d, 0x05, 0x1e, 0xff, 0x1f, 0x01, | |
231 | 0x10, 0x20, 0 | |
232 | }; | |
233 | ||
6c8f5b90 DM |
234 | static int __devinit bw2_do_default_mode(struct bw2_par *par, |
235 | struct fb_info *info, | |
236 | int *linebytes) | |
1da177e4 LT |
237 | { |
238 | u8 status, mon; | |
239 | u8 *p; | |
240 | ||
241 | status = sbus_readb(&par->regs->status); | |
242 | mon = status & BWTWO_SR_RES_MASK; | |
243 | switch (status & BWTWO_SR_ID_MASK) { | |
244 | case BWTWO_SR_ID_MONO_ECL: | |
245 | if (mon == BWTWO_SR_1600_1280) { | |
246 | p = bw2regs_1600; | |
247 | info->var.xres = info->var.xres_virtual = 1600; | |
248 | info->var.yres = info->var.yres_virtual = 1280; | |
249 | *linebytes = 1600 / 8; | |
250 | } else | |
251 | p = bw2regs_ecl; | |
252 | break; | |
253 | ||
254 | case BWTWO_SR_ID_MONO: | |
255 | p = bw2regs_analog; | |
256 | break; | |
257 | ||
258 | case BWTWO_SR_ID_MSYNC: | |
259 | if (mon == BWTWO_SR_1152_900_76_A || | |
260 | mon == BWTWO_SR_1152_900_76_B) | |
261 | p = bw2regs_76hz; | |
262 | else | |
263 | p = bw2regs_66hz; | |
264 | break; | |
265 | ||
266 | case BWTWO_SR_ID_NOCONN: | |
6c8f5b90 | 267 | return 0; |
1da177e4 LT |
268 | |
269 | default: | |
6c8f5b90 DM |
270 | printk(KERN_ERR "bw2: can't handle SR %02x\n", |
271 | status); | |
272 | return -EINVAL; | |
1da177e4 LT |
273 | } |
274 | for ( ; *p; p += 2) { | |
275 | u8 __iomem *regp = &((u8 __iomem *)par->regs)[p[0]]; | |
276 | sbus_writeb(p[1], regp); | |
277 | } | |
6c8f5b90 | 278 | return 0; |
1da177e4 LT |
279 | } |
280 | ||
c7f439b9 | 281 | static int __devinit bw2_probe(struct of_device *op, const struct of_device_id *match) |
1da177e4 | 282 | { |
50312ce9 | 283 | struct device_node *dp = op->node; |
c7f439b9 DM |
284 | struct fb_info *info; |
285 | struct bw2_par *par; | |
50312ce9 | 286 | int linebytes, err; |
1da177e4 | 287 | |
c7f439b9 | 288 | info = framebuffer_alloc(sizeof(struct bw2_par), &op->dev); |
1da177e4 | 289 | |
c7f439b9 DM |
290 | err = -ENOMEM; |
291 | if (!info) | |
292 | goto out_err; | |
293 | par = info->par; | |
50312ce9 | 294 | |
c7f439b9 | 295 | spin_lock_init(&par->lock); |
50312ce9 | 296 | |
c7f439b9 DM |
297 | par->physbase = op->resource[0].start; |
298 | par->which_io = op->resource[0].flags & IORESOURCE_BITS; | |
299 | ||
6cd5a86b | 300 | sbusfb_fill_var(&info->var, dp, 1); |
50312ce9 | 301 | linebytes = of_getintprop_default(dp, "linebytes", |
c7f439b9 | 302 | info->var.xres); |
50312ce9 | 303 | |
c7f439b9 DM |
304 | info->var.red.length = info->var.green.length = |
305 | info->var.blue.length = info->var.bits_per_pixel; | |
306 | info->var.red.offset = info->var.green.offset = | |
307 | info->var.blue.offset = 0; | |
1da177e4 | 308 | |
c7f439b9 DM |
309 | par->regs = of_ioremap(&op->resource[0], BWTWO_REGISTER_OFFSET, |
310 | sizeof(struct bw2_regs), "bw2 regs"); | |
311 | if (!par->regs) | |
312 | goto out_release_fb; | |
1da177e4 | 313 | |
6c8f5b90 DM |
314 | if (!of_find_property(dp, "width", NULL)) { |
315 | err = bw2_do_default_mode(par, info, &linebytes); | |
316 | if (err) | |
317 | goto out_unmap_regs; | |
318 | } | |
1da177e4 | 319 | |
c7f439b9 | 320 | par->fbsize = PAGE_ALIGN(linebytes * info->var.yres); |
1da177e4 | 321 | |
c7f439b9 DM |
322 | info->flags = FBINFO_DEFAULT; |
323 | info->fbops = &bw2_ops; | |
50312ce9 | 324 | |
c7f439b9 DM |
325 | info->screen_base = of_ioremap(&op->resource[0], 0, |
326 | par->fbsize, "bw2 ram"); | |
327 | if (!info->screen_base) | |
328 | goto out_unmap_regs; | |
1da177e4 | 329 | |
59f7137a | 330 | bw2_blank(FB_BLANK_UNBLANK, info); |
1da177e4 | 331 | |
c7f439b9 | 332 | bw2_init_fix(info, linebytes); |
1da177e4 | 333 | |
c7f439b9 DM |
334 | err = register_framebuffer(info); |
335 | if (err < 0) | |
336 | goto out_unmap_screen; | |
1da177e4 | 337 | |
c7f439b9 | 338 | dev_set_drvdata(&op->dev, info); |
50312ce9 | 339 | |
194f1a68 | 340 | printk(KERN_INFO "%s: bwtwo at %lx:%lx\n", |
c7f439b9 | 341 | dp->full_name, par->which_io, par->physbase); |
1da177e4 | 342 | |
50312ce9 | 343 | return 0; |
1da177e4 | 344 | |
c7f439b9 DM |
345 | out_unmap_screen: |
346 | of_iounmap(&op->resource[0], info->screen_base, par->fbsize); | |
347 | ||
348 | out_unmap_regs: | |
349 | of_iounmap(&op->resource[0], par->regs, sizeof(struct bw2_regs)); | |
350 | ||
351 | out_release_fb: | |
352 | framebuffer_release(info); | |
1da177e4 | 353 | |
c7f439b9 DM |
354 | out_err: |
355 | return err; | |
50312ce9 | 356 | } |
1da177e4 | 357 | |
e3a411a3 | 358 | static int __devexit bw2_remove(struct of_device *op) |
50312ce9 | 359 | { |
c7f439b9 DM |
360 | struct fb_info *info = dev_get_drvdata(&op->dev); |
361 | struct bw2_par *par = info->par; | |
50312ce9 | 362 | |
c7f439b9 | 363 | unregister_framebuffer(info); |
50312ce9 | 364 | |
c7f439b9 DM |
365 | of_iounmap(&op->resource[0], par->regs, sizeof(struct bw2_regs)); |
366 | of_iounmap(&op->resource[0], info->screen_base, par->fbsize); | |
50312ce9 | 367 | |
c7f439b9 | 368 | framebuffer_release(info); |
50312ce9 | 369 | |
e3a411a3 | 370 | dev_set_drvdata(&op->dev, NULL); |
1da177e4 LT |
371 | |
372 | return 0; | |
373 | } | |
374 | ||
fd098316 | 375 | static const struct of_device_id bw2_match[] = { |
50312ce9 DM |
376 | { |
377 | .name = "bwtwo", | |
378 | }, | |
379 | {}, | |
380 | }; | |
381 | MODULE_DEVICE_TABLE(of, bw2_match); | |
1da177e4 | 382 | |
50312ce9 DM |
383 | static struct of_platform_driver bw2_driver = { |
384 | .name = "bw2", | |
385 | .match_table = bw2_match, | |
386 | .probe = bw2_probe, | |
387 | .remove = __devexit_p(bw2_remove), | |
388 | }; | |
1da177e4 | 389 | |
50312ce9 DM |
390 | static int __init bw2_init(void) |
391 | { | |
392 | if (fb_get_options("bw2fb", NULL)) | |
393 | return -ENODEV; | |
394 | ||
395 | return of_register_driver(&bw2_driver, &of_bus_type); | |
1da177e4 LT |
396 | } |
397 | ||
50312ce9 | 398 | static void __exit bw2_exit(void) |
1da177e4 | 399 | { |
2556bf12 | 400 | of_unregister_driver(&bw2_driver); |
1da177e4 LT |
401 | } |
402 | ||
50312ce9 | 403 | module_init(bw2_init); |
1da177e4 | 404 | module_exit(bw2_exit); |
1da177e4 LT |
405 | |
406 | MODULE_DESCRIPTION("framebuffer driver for BWTWO chipsets"); | |
50312ce9 DM |
407 | MODULE_AUTHOR("David S. Miller <davem@davemloft.net>"); |
408 | MODULE_VERSION("2.0"); | |
1da177e4 | 409 | MODULE_LICENSE("GPL"); |