aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/video/bw2.c
blob: f53bf3ba127898c01a480b69be8b211bf02ab561 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
/* bw2.c: BWTWO frame buffer driver
 *
 * Copyright (C) 2003 David S. Miller (davem@redhat.com)
 * Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz)
 * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
 * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
 *
 * Driver layout based loosely on tgafb.c, see that file for credits.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/fb.h>
#include <linux/mm.h>

#include <asm/io.h>
#include <asm/sbus.h>
#include <asm/oplib.h>
#include <asm/fbio.h>

#ifdef CONFIG_SPARC32
#include <asm/sun4paddr.h>
#endif

#include "sbuslib.h"

/*
 * Local functions.
 */

static int bw2_blank(int, struct fb_info *);

static int bw2_mmap(struct fb_info *, struct file *, struct vm_area_struct *);
static int bw2_ioctl(struct inode *, struct file *, unsigned int,
		     unsigned long, struct fb_info *);

/*
 *  Frame buffer operations
 */

static struct fb_ops bw2_ops = {
	.owner			= THIS_MODULE,
	.fb_blank		= bw2_blank,
	.fb_fillrect		= cfb_fillrect,
	.fb_copyarea		= cfb_copyarea,
	.fb_imageblit		= cfb_imageblit,
	.fb_mmap		= bw2_mmap,
	.fb_ioctl		= bw2_ioctl,
};

/* OBio addresses for the bwtwo registers */
#define BWTWO_REGISTER_OFFSET 0x400000

struct bt_regs {
	volatile u32 addr;
	volatile u32 color_map;
	volatile u32 control;
	volatile u32 cursor;
};

struct bw2_regs {
	struct bt_regs	cmap;
	volatile u8	control;
	volatile u8	status;
	volatile u8	cursor_start;
	volatile u8	cursor_end;
	volatile u8	h_blank_start;
	volatile u8	h_blank_end;
	volatile u8	h_sync_start;
	volatile u8	h_sync_end;
	volatile u8	comp_sync_end;
	volatile u8	v_blank_start_high;
	volatile u8	v_blank_start_low;
	volatile u8	v_blank_end;
	volatile u8	v_sync_start;
	volatile u8	v_sync_end;
	volatile u8	xfer_holdoff_start;
	volatile u8	xfer_holdoff_end;
};

/* Status Register Constants */
#define BWTWO_SR_RES_MASK	0x70
#define BWTWO_SR_1600_1280	0x50
#define BWTWO_SR_1152_900_76_A	0x40
#define BWTWO_SR_1152_900_76_B	0x60
#define BWTWO_SR_ID_MASK	0x0f
#define BWTWO_SR_ID_MONO	0x02
#define BWTWO_SR_ID_MONO_ECL	0x03
#define BWTWO_SR_ID_MSYNC	0x04
#define BWTWO_SR_ID_NOCONN	0x0a

/* Control Register Constants */
#define BWTWO_CTL_ENABLE_INTS   0x80
#define BWTWO_CTL_ENABLE_VIDEO  0x40
#define BWTWO_CTL_ENABLE_TIMING 0x20
#define BWTWO_CTL_ENABLE_CURCMP 0x10
#define BWTWO_CTL_XTAL_MASK     0x0C
#define BWTWO_CTL_DIVISOR_MASK  0x03

/* Status Register Constants */
#define BWTWO_STAT_PENDING_INT  0x80
#define BWTWO_STAT_MSENSE_MASK  0x70
#define BWTWO_STAT_ID_MASK      0x0f

struct bw2_par {
	spinlock_t		lock;
	struct bw2_regs		__iomem *regs;

	u32			flags;
#define BW2_FLAG_BLANKED	0x00000001

	unsigned long		physbase;
	unsigned long		fbsize;

	struct sbus_dev		*sdev;
	struct list_head	list;
};

/**
 *      bw2_blank - Optional function.  Blanks the display.
 *      @blank_mode: the blank mode we want.
 *      @info: frame buffer structure that represents a single frame buffer
 */
static int
bw2_blank(int blank, struct fb_info *info)
{
	struct bw2_par *par = (struct bw2_par *) info->par;
	struct bw2_regs __iomem *regs = par->regs;
	unsigned long flags;
	u8 val;

	spin_lock_irqsave(&par->lock, flags);

	switch (blank) {
	case FB_BLANK_UNBLANK: /* Unblanking */
		val = sbus_readb(&regs->control);
		val |= BWTWO_CTL_ENABLE_VIDEO;
		sbus_writeb(val, &regs->control);
		par->flags &= ~BW2_FLAG_BLANKED;
		break;

	case FB_BLANK_NORMAL: /* Normal blanking */
	case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
	case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
	case FB_BLANK_POWERDOWN: /* Poweroff */
		val = sbus_readb(&regs->control);
		val &= ~BWTWO_CTL_ENABLE_VIDEO;
		sbus_writeb(val, &regs->control);
		par->flags |= BW2_FLAG_BLANKED;
		break;
	}

	spin_unlock_irqrestore(&par->lock, flags);

	return 0;
}

static struct sbus_mmap_map bw2_mmap_map[] = {
	{
		.size = SBUS_MMAP_FBSIZE(1)
	},
	{ .size = 0 }
};

static int bw2_mmap(struct fb_info *info, struct file *file, struct vm_area_struct *vma)
{
	struct bw2_par *par = (struct bw2_par *)info->par;

	return sbusfb_mmap_helper(bw2_mmap_map,
				  par->physbase, par->fbsize,
				  (par->sdev ?
				   par->sdev->reg_addrs[0].which_io :
				   0),
				  vma);
}

static int bw2_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
		     unsigned long arg, struct fb_info *info)
{
	struct bw2_par *par = (struct bw2_par *) info->par;

	return sbusfb_ioctl_helper(cmd, arg, info,
				   FBTYPE_SUN2BW, 1, par->fbsize);
}

/*
 *  Initialisation
 */

static void
bw2_init_fix(struct fb_info *info, int linebytes)
{
	strlcpy(info->fix.id, "bwtwo", sizeof(info->fix.id));

	info->fix.type = FB_TYPE_PACKED_PIXELS;
	info->fix.visual = FB_VISUAL_MONO01;

	info->fix.line_length = linebytes;

	info->fix.accel = FB_ACCEL_SUN_BWTWO;
}

static u8 bw2regs_1600[] __initdata = {
	0x14, 0x8b,	0x15, 0x28,	0x16, 0x03,	0x17, 0x13,
	0x18, 0x7b,	0x19, 0x05,	0x1a, 0x34,	0x1b, 0x2e,
	0x1c, 0x00,	0x1d, 0x0a,	0x1e, 0xff,	0x1f, 0x01,
	0x10, 0x21,	0
};

static u8 bw2regs_ecl[] __initdata = {
	0x14, 0x65,	0x15, 0x1e,	0x16, 0x04,	0x17, 0x0c,
	0x18, 0x5e,	0x19, 0x03,	0x1a, 0xa7,	0x1b, 0x23,
	0x1c, 0x00,	0x1d, 0x08,	0x1e, 0xff,	0x1f, 0x01,
	0x10, 0x20,	0
};

static u8 bw2regs_analog[] __initdata = {
	0x14, 0xbb,	0x15, 0x2b,	0x16, 0x03,	0x17, 0x13,
	0x18, 0xb0,	0x19, 0x03,	0x1a, 0xa6,	0x1b, 0x22,
	0x1c, 0x01,	0x1d, 0x05,	0x1e, 0xff,	0x1f, 0x01,
	0x10, 0x20,	0
};

static u8 bw2regs_76hz[] __initdata = {
	0x14, 0xb7,	0x15, 0x27,	0x16, 0x03,	0x17, 0x0f,
	0x18, 0xae,	0x19, 0x03,	0x1a, 0xae,	0x1b, 0x2a,
	0x1c, 0x01,	0x1d, 0x09,	0x1e, 0xff,	0x1f, 0x01,
	0x10, 0x24,	0
};

static u8 bw2regs_66hz[] __initdata = {
	0x14, 0xbb,	0x15, 0x2b,	0x16, 0x04,	0x17, 0x14,
	0x18, 0xae,	0x19, 0x03,	0x1a, 0xa8,	0x1b, 0x24,
	0x1c, 0x01,	0x1d, 0x05,	0x1e, 0xff,	0x1f, 0x01,
	0x10, 0x20,	0
};

static void bw2_do_default_mode(struct bw2_par *par, struct fb_info *info,
				int *linebytes)
{
	u8 status, mon;
	u8 *p;

	status = sbus_readb(&par->regs->status);
	mon = status & BWTWO_SR_RES_MASK;
	switch (status & BWTWO_SR_ID_MASK) {
	case BWTWO_SR_ID_MONO_ECL:
		if (mon == BWTWO_SR_1600_1280) {
			p = bw2regs_1600;
			info->var.xres = info->var.xres_virtual = 1600;
			info->var.yres = info->var.yres_virtual = 1280;
			*linebytes = 1600 / 8;
		} else
			p = bw2regs_ecl;
		break;

	case BWTWO_SR_ID_MONO:
		p = bw2regs_analog;
		break;

	case BWTWO_SR_ID_MSYNC:
		if (mon == BWTWO_SR_1152_900_76_A ||
		    mon == BWTWO_SR_1152_900_76_B)
			p = bw2regs_76hz;
		else
			p = bw2regs_66hz;
		break;

	case BWTWO_SR_ID_NOCONN:
		return;

	default:
		prom_printf("bw2: can't handle SR %02x\n",
			    status);
		prom_halt();
	}
	for ( ; *p; p += 2) {
		u8 __iomem *regp = &((u8 __iomem *)par->regs)[p[0]];
		sbus_writeb(p[1], regp);
	}
}

struct all_info {
	struct fb_info info;
	struct bw2_par par;
	struct list_head list;
};
static LIST_HEAD(bw2_list);

static void bw2_init_one(struct sbus_dev *sdev)
{
	struct all_info *all;
	struct resource *resp;
#ifdef CONFIG_SUN4
	struct resource res;
#endif
	int linebytes;

	all = kmalloc(sizeof(*all), GFP_KERNEL);
	if (!all) {
		printk(KERN_ERR "bw2: Cannot allocate memory.\n");
		return;
	}
	memset(all, 0, sizeof(*all));

	INIT_LIST_HEAD(&all->list);

	spin_lock_init(&all->par.lock);
	all->par.sdev = sdev;

#ifdef CONFIG_SUN4
	if (!sdev) {
		all->par.physbase = sun4_bwtwo_physaddr;
		res.start = sun4_bwtwo_physaddr;
		res.end = res.start + BWTWO_REGISTER_OFFSET + sizeof(struct bw2_regs) - 1;
		res.flags = IORESOURCE_IO;
		resp = &res;
		all->info.var.xres = all->info.var.xres_virtual = 1152;
		all->info.var.yres = all->info.var.yres_virtual = 900;
		all->info.var.bits_per_pixel = 1;
		linebytes = 1152 / 8;
	} else
#else
	{
		if (!sdev)
			BUG();
		all->par.physbase = sdev->reg_addrs[0].phys_addr;
		resp = &sdev->resource[0];
		sbusfb_fill_var(&all->info.var, (sdev ? sdev->prom_node : 0), 1);
		linebytes = prom_getintdefault(sdev->prom_node, "linebytes",
					       all->info.var.xres);
	}
#endif
	all->info.var.red.length = all->info.var.green.length =
		all->info.var.blue.length = all->info.var.bits_per_pixel;
	all->info.var.red.offset = all->info.var.green.offset =
		all->info.var.blue.offset = 0;

	all->par.regs = sbus_ioremap(resp, BWTWO_REGISTER_OFFSET,
			     sizeof(struct bw2_regs), "bw2 regs");

	if (sdev && !prom_getbool(sdev->prom_node, "width"))
		bw2_do_default_mode(&all->par, &all->info, &linebytes);

	all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);

	all->info.flags = FBINFO_DEFAULT;
	all->info.fbops = &bw2_ops;
#if defined(CONFIG_SPARC32)
	if (sdev)
		all->info.screen_base = (char __iomem *)
			prom_getintdefault(sdev->prom_node, "address", 0);
#endif
	if (!all->info.screen_base)
		all->info.screen_base =
			sbus_ioremap(resp, 0, all->par.fbsize, "bw2 ram");
	all->info.par = &all->par;

	bw2_blank(0, &all->info);

	bw2_init_fix(&all->info, linebytes);

	if (register_framebuffer(&all->info) < 0) {
		printk(KERN_ERR "bw2: Could not register framebuffer.\n");
		kfree(all);
		return;
	}

	list_add(&all->list, &bw2_list);

	printk("bw2: bwtwo at %lx:%lx\n",
	       (long) (sdev ? sdev->reg_addrs[0].which_io : 0),
	       (long) all->par.physbase);
}

int __init bw2_init(void)
{
	struct sbus_bus *sbus;
	struct sbus_dev *sdev;

	if (fb_get_options("bw2fb", NULL))
		return -ENODEV;

#ifdef CONFIG_SUN4
	bw2_init_one(NULL);
#endif
	for_all_sbusdev(sdev, sbus) {
		if (!strcmp(sdev->prom_name, "bwtwo"))
			bw2_init_one(sdev);
	}

	return 0;
}

void __exit bw2_exit(void)
{
	struct list_head *pos, *tmp;

	list_for_each_safe(pos, tmp, &bw2_list) {
		struct all_info *all = list_entry(pos, typeof(*all), list);

		unregister_framebuffer(&all->info);
		kfree(all);
	}
}

int __init
bw2_setup(char *arg)
{
	/* No cmdline options yet... */
	return 0;
}

module_init(bw2_init);

#ifdef MODULE
module_exit(bw2_exit);
#endif

MODULE_DESCRIPTION("framebuffer driver for BWTWO chipsets");
MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
MODULE_LICENSE("GPL");