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