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12#include <linux/module.h>
13#include <linux/kernel.h>
14#include <linux/errno.h>
15#include <linux/string.h>
16#include <linux/delay.h>
17#include <linux/init.h>
18#include <linux/fb.h>
19#include <linux/mm.h>
20#include <linux/of_device.h>
21
22#include <asm/io.h>
23#include <asm/fbio.h>
24
25#include "sbuslib.h"
26
27
28
29
30
31static int bw2_blank(int, struct fb_info *);
32
33static int bw2_mmap(struct fb_info *, struct vm_area_struct *);
34static int bw2_ioctl(struct fb_info *, unsigned int, unsigned long);
35
36
37
38
39
40static const 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,
48#ifdef CONFIG_COMPAT
49 .fb_compat_ioctl = sbusfb_compat_ioctl,
50#endif
51};
52
53
54#define BWTWO_REGISTER_OFFSET 0x400000
55
56struct bt_regs {
57 u32 addr;
58 u32 color_map;
59 u32 control;
60 u32 cursor;
61};
62
63struct bw2_regs {
64 struct bt_regs cmap;
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;
81};
82
83
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
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
103#define BWTWO_STAT_PENDING_INT 0x80
104#define BWTWO_STAT_MSENSE_MASK 0x70
105#define BWTWO_STAT_ID_MASK 0x0f
106
107struct 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 which_io;
115};
116
117
118
119
120
121
122static int
123bw2_blank(int blank, struct fb_info *info)
124{
125 struct bw2_par *par = (struct bw2_par *) info->par;
126 struct bw2_regs __iomem *regs = par->regs;
127 unsigned long flags;
128 u8 val;
129
130 spin_lock_irqsave(&par->lock, flags);
131
132 switch (blank) {
133 case FB_BLANK_UNBLANK:
134 val = sbus_readb(®s->control);
135 val |= BWTWO_CTL_ENABLE_VIDEO;
136 sbus_writeb(val, ®s->control);
137 par->flags &= ~BW2_FLAG_BLANKED;
138 break;
139
140 case FB_BLANK_NORMAL:
141 case FB_BLANK_VSYNC_SUSPEND:
142 case FB_BLANK_HSYNC_SUSPEND:
143 case FB_BLANK_POWERDOWN:
144 val = sbus_readb(®s->control);
145 val &= ~BWTWO_CTL_ENABLE_VIDEO;
146 sbus_writeb(val, ®s->control);
147 par->flags |= BW2_FLAG_BLANKED;
148 break;
149 }
150
151 spin_unlock_irqrestore(&par->lock, flags);
152
153 return 0;
154}
155
156static struct sbus_mmap_map bw2_mmap_map[] = {
157 {
158 .size = SBUS_MMAP_FBSIZE(1)
159 },
160 { .size = 0 }
161};
162
163static int bw2_mmap(struct fb_info *info, struct vm_area_struct *vma)
164{
165 struct bw2_par *par = (struct bw2_par *)info->par;
166
167 return sbusfb_mmap_helper(bw2_mmap_map,
168 info->fix.smem_start, info->fix.smem_len,
169 par->which_io,
170 vma);
171}
172
173static int bw2_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
174{
175 return sbusfb_ioctl_helper(cmd, arg, info,
176 FBTYPE_SUN2BW, 1, info->fix.smem_len);
177}
178
179
180
181
182
183static void bw2_init_fix(struct fb_info *info, int linebytes)
184{
185 strlcpy(info->fix.id, "bwtwo", sizeof(info->fix.id));
186
187 info->fix.type = FB_TYPE_PACKED_PIXELS;
188 info->fix.visual = FB_VISUAL_MONO01;
189
190 info->fix.line_length = linebytes;
191
192 info->fix.accel = FB_ACCEL_SUN_BWTWO;
193}
194
195static u8 bw2regs_1600[] = {
196 0x14, 0x8b, 0x15, 0x28, 0x16, 0x03, 0x17, 0x13,
197 0x18, 0x7b, 0x19, 0x05, 0x1a, 0x34, 0x1b, 0x2e,
198 0x1c, 0x00, 0x1d, 0x0a, 0x1e, 0xff, 0x1f, 0x01,
199 0x10, 0x21, 0
200};
201
202static u8 bw2regs_ecl[] = {
203 0x14, 0x65, 0x15, 0x1e, 0x16, 0x04, 0x17, 0x0c,
204 0x18, 0x5e, 0x19, 0x03, 0x1a, 0xa7, 0x1b, 0x23,
205 0x1c, 0x00, 0x1d, 0x08, 0x1e, 0xff, 0x1f, 0x01,
206 0x10, 0x20, 0
207};
208
209static u8 bw2regs_analog[] = {
210 0x14, 0xbb, 0x15, 0x2b, 0x16, 0x03, 0x17, 0x13,
211 0x18, 0xb0, 0x19, 0x03, 0x1a, 0xa6, 0x1b, 0x22,
212 0x1c, 0x01, 0x1d, 0x05, 0x1e, 0xff, 0x1f, 0x01,
213 0x10, 0x20, 0
214};
215
216static u8 bw2regs_76hz[] = {
217 0x14, 0xb7, 0x15, 0x27, 0x16, 0x03, 0x17, 0x0f,
218 0x18, 0xae, 0x19, 0x03, 0x1a, 0xae, 0x1b, 0x2a,
219 0x1c, 0x01, 0x1d, 0x09, 0x1e, 0xff, 0x1f, 0x01,
220 0x10, 0x24, 0
221};
222
223static u8 bw2regs_66hz[] = {
224 0x14, 0xbb, 0x15, 0x2b, 0x16, 0x04, 0x17, 0x14,
225 0x18, 0xae, 0x19, 0x03, 0x1a, 0xa8, 0x1b, 0x24,
226 0x1c, 0x01, 0x1d, 0x05, 0x1e, 0xff, 0x1f, 0x01,
227 0x10, 0x20, 0
228};
229
230static int bw2_do_default_mode(struct bw2_par *par, struct fb_info *info,
231 int *linebytes)
232{
233 u8 status, mon;
234 u8 *p;
235
236 status = sbus_readb(&par->regs->status);
237 mon = status & BWTWO_SR_RES_MASK;
238 switch (status & BWTWO_SR_ID_MASK) {
239 case BWTWO_SR_ID_MONO_ECL:
240 if (mon == BWTWO_SR_1600_1280) {
241 p = bw2regs_1600;
242 info->var.xres = info->var.xres_virtual = 1600;
243 info->var.yres = info->var.yres_virtual = 1280;
244 *linebytes = 1600 / 8;
245 } else
246 p = bw2regs_ecl;
247 break;
248
249 case BWTWO_SR_ID_MONO:
250 p = bw2regs_analog;
251 break;
252
253 case BWTWO_SR_ID_MSYNC:
254 if (mon == BWTWO_SR_1152_900_76_A ||
255 mon == BWTWO_SR_1152_900_76_B)
256 p = bw2regs_76hz;
257 else
258 p = bw2regs_66hz;
259 break;
260
261 case BWTWO_SR_ID_NOCONN:
262 return 0;
263
264 default:
265 printk(KERN_ERR "bw2: can't handle SR %02x\n",
266 status);
267 return -EINVAL;
268 }
269 for ( ; *p; p += 2) {
270 u8 __iomem *regp = &((u8 __iomem *)par->regs)[p[0]];
271 sbus_writeb(p[1], regp);
272 }
273 return 0;
274}
275
276static int bw2_probe(struct platform_device *op)
277{
278 struct device_node *dp = op->dev.of_node;
279 struct fb_info *info;
280 struct bw2_par *par;
281 int linebytes, err;
282
283 info = framebuffer_alloc(sizeof(struct bw2_par), &op->dev);
284
285 err = -ENOMEM;
286 if (!info)
287 goto out_err;
288 par = info->par;
289
290 spin_lock_init(&par->lock);
291
292 info->fix.smem_start = op->resource[0].start;
293 par->which_io = op->resource[0].flags & IORESOURCE_BITS;
294
295 sbusfb_fill_var(&info->var, dp, 1);
296 linebytes = of_getintprop_default(dp, "linebytes",
297 info->var.xres);
298
299 info->var.red.length = info->var.green.length =
300 info->var.blue.length = info->var.bits_per_pixel;
301 info->var.red.offset = info->var.green.offset =
302 info->var.blue.offset = 0;
303
304 par->regs = of_ioremap(&op->resource[0], BWTWO_REGISTER_OFFSET,
305 sizeof(struct bw2_regs), "bw2 regs");
306 if (!par->regs)
307 goto out_release_fb;
308
309 if (!of_find_property(dp, "width", NULL)) {
310 err = bw2_do_default_mode(par, info, &linebytes);
311 if (err)
312 goto out_unmap_regs;
313 }
314
315 info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres);
316
317 info->flags = FBINFO_DEFAULT;
318 info->fbops = &bw2_ops;
319
320 info->screen_base = of_ioremap(&op->resource[0], 0,
321 info->fix.smem_len, "bw2 ram");
322 if (!info->screen_base) {
323 err = -ENOMEM;
324 goto out_unmap_regs;
325 }
326
327 bw2_blank(FB_BLANK_UNBLANK, info);
328
329 bw2_init_fix(info, linebytes);
330
331 err = register_framebuffer(info);
332 if (err < 0)
333 goto out_unmap_screen;
334
335 dev_set_drvdata(&op->dev, info);
336
337 printk(KERN_INFO "%pOF: bwtwo at %lx:%lx\n",
338 dp, par->which_io, info->fix.smem_start);
339
340 return 0;
341
342out_unmap_screen:
343 of_iounmap(&op->resource[0], info->screen_base, info->fix.smem_len);
344
345out_unmap_regs:
346 of_iounmap(&op->resource[0], par->regs, sizeof(struct bw2_regs));
347
348out_release_fb:
349 framebuffer_release(info);
350
351out_err:
352 return err;
353}
354
355static int bw2_remove(struct platform_device *op)
356{
357 struct fb_info *info = dev_get_drvdata(&op->dev);
358 struct bw2_par *par = info->par;
359
360 unregister_framebuffer(info);
361
362 of_iounmap(&op->resource[0], par->regs, sizeof(struct bw2_regs));
363 of_iounmap(&op->resource[0], info->screen_base, info->fix.smem_len);
364
365 framebuffer_release(info);
366
367 return 0;
368}
369
370static const struct of_device_id bw2_match[] = {
371 {
372 .name = "bwtwo",
373 },
374 {},
375};
376MODULE_DEVICE_TABLE(of, bw2_match);
377
378static struct platform_driver bw2_driver = {
379 .driver = {
380 .name = "bw2",
381 .of_match_table = bw2_match,
382 },
383 .probe = bw2_probe,
384 .remove = bw2_remove,
385};
386
387static int __init bw2_init(void)
388{
389 if (fb_get_options("bw2fb", NULL))
390 return -ENODEV;
391
392 return platform_driver_register(&bw2_driver);
393}
394
395static void __exit bw2_exit(void)
396{
397 platform_driver_unregister(&bw2_driver);
398}
399
400module_init(bw2_init);
401module_exit(bw2_exit);
402
403MODULE_DESCRIPTION("framebuffer driver for BWTWO chipsets");
404MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
405MODULE_VERSION("2.0");
406MODULE_LICENSE("GPL");
407
