summaryrefslogtreecommitdiffstats
path: root/drivers/video/hpfb.c
blob: e97fe8481d59f5b52c17b052dcebd24783c7ca3b (plain)
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
/*
 *	HP300 Topcat framebuffer support (derived from macfb of all things)
 *	Phil Blundell <philb@gnu.org> 1998
 *	DIO-II, colour map and Catseye support by
 *	Kars de Jong <jongk@linux-m68k.org>, May 2004.
 */

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

#include <asm/io.h>
#include <asm/uaccess.h>

static struct fb_info fb_info = {
	.fix = {
		.id		= "HP300 ",
		.type		= FB_TYPE_PACKED_PIXELS,
		.visual		= FB_VISUAL_PSEUDOCOLOR,
		.accel		= FB_ACCEL_NONE,
	}
};

static unsigned long fb_regs;
static unsigned char fb_bitmask;

#define TC_NBLANK	0x4080
#define TC_WEN		0x4088
#define TC_REN		0x408c
#define TC_FBEN		0x4090
#define TC_PRR		0x40ea

/* These defines match the X window system */
#define RR_CLEAR	0x0
#define RR_COPY		0x3
#define RR_NOOP		0x5
#define RR_XOR		0x6
#define RR_INVERT	0xa
#define RR_COPYINVERTED 0xc
#define RR_SET		0xf

/* blitter regs */
#define BUSY		0x4044
#define WMRR		0x40ef
#define SOURCE_X	0x40f2
#define SOURCE_Y	0x40f6
#define DEST_X		0x40fa
#define DEST_Y		0x40fe
#define WHEIGHT		0x4106
#define WWIDTH		0x4102
#define WMOVE		0x409c

static struct fb_var_screeninfo hpfb_defined = {
	.red		= {
		.length = 8,
	},
	.green		= {
		.length = 8,
	},
	.blue		= {
		.length = 8,
	},
	.activate	= FB_ACTIVATE_NOW,
	.height		= -1,
	.width		= -1,
	.vmode		= FB_VMODE_NONINTERLACED,
};

static int hpfb_setcolreg(unsigned regno, unsigned red, unsigned green,
			  unsigned blue, unsigned transp,
			  struct fb_info *info)
{
	/* use MSBs */
	unsigned char _red  =red>>8;
	unsigned char _green=green>>8;
	unsigned char _blue =blue>>8;
	unsigned char _regno=regno;

	/*
	 *  Set a single color register. The values supplied are
	 *  already rounded down to the hardware's capabilities
	 *  (according to the entries in the `var' structure). Return
	 *  != 0 for invalid regno.
	 */

	if (regno >= info->cmap.len)
		return 1;
	
	while (in_be16(fb_regs + 0x6002) & 0x4) udelay(1);

	out_be16(fb_regs + 0x60ba, 0xff);

	out_be16(fb_regs + 0x60b2, _red);
	out_be16(fb_regs + 0x60b4, _green);
	out_be16(fb_regs + 0x60b6, _blue);
	out_be16(fb_regs + 0x60b8, ~_regno);
	out_be16(fb_regs + 0x60f0, 0xff);

	udelay(100);

	while (in_be16(fb_regs + 0x6002) & 0x4) udelay(1);
	out_be16(fb_regs + 0x60b2, 0);
	out_be16(fb_regs + 0x60b4, 0);
	out_be16(fb_regs + 0x60b6, 0);
	out_be16(fb_regs + 0x60b8, 0);

	return 0;
}

/* 0 unblank, 1 blank, 2 no vsync, 3 no hsync, 4 off */

static int hpfb_blank(int blank, struct fb_info *info)
{
	out_8(fb_regs + TC_NBLANK, (blank ? 0x00 : fb_bitmask));

	return 0;
}

static void topcat_blit(int x0, int y0, int x1, int y1, int w, int h, int rr)
{
	if (rr >= 0) {
		while (in_8(fb_regs + BUSY) & fb_bitmask)
			;
	}
	out_8(fb_regs + TC_FBEN, fb_bitmask);
	if (rr >= 0) {
		out_8(fb_regs + TC_WEN, fb_bitmask);
		out_8(fb_regs + WMRR, rr);
	}
	out_be16(fb_regs + SOURCE_X, x0);
	out_be16(fb_regs + SOURCE_Y, y0);
	out_be16(fb_regs + DEST_X, x1);
	out_be16(fb_regs + DEST_Y, y1);
	out_be16(fb_regs + WWIDTH, w);
	out_be16(fb_regs + WHEIGHT, h);
	out_8(fb_regs + WMOVE, fb_bitmask);
}

static void hpfb_copyarea(struct fb_info *info, const struct fb_copyarea *area) 
{
	topcat_blit(area->sx, area->sy, area->dx, area->dy, area->width, area->height, RR_COPY);
}

static void hpfb_fillrect(struct fb_info *p, const struct fb_fillrect *region)
{
	u8 clr;

	clr = region->color & 0xff;

	while (in_8(fb_regs + BUSY) & fb_bitmask)
		;

	/* Foreground */
	out_8(fb_regs + TC_WEN, fb_bitmask & clr);
	out_8(fb_regs + WMRR, (region->rop == ROP_COPY ? RR_SET : RR_INVERT));

	/* Background */
	out_8(fb_regs + TC_WEN, fb_bitmask & ~clr);
	out_8(fb_regs + WMRR, (region->rop == ROP_COPY ? RR_CLEAR : RR_NOOP));

	topcat_blit(region->dx, region->dy, region->dx, region->dy, region->width, region->height, -1);
}

static int hpfb_sync(struct fb_info *info)
{
	/*
	 * Since we also access the framebuffer directly, we have to wait
	 * until the block mover is finished
	 */
	while (in_8(fb_regs + BUSY) & fb_bitmask)
		;

	out_8(fb_regs + TC_WEN, fb_bitmask);
	out_8(fb_regs + TC_PRR, RR_COPY);
	out_8(fb_regs + TC_FBEN, fb_bitmask);

	return 0;
}

static struct fb_ops hpfb_ops = {
	.owner		= THIS_MODULE,
	.fb_setcolreg	= hpfb_setcolreg,
	.fb_blank	= hpfb_blank,
	.fb_fillrect	= hpfb_fillrect,
	.fb_copyarea	= hpfb_copyarea,
	.fb_imageblit	= cfb_imageblit,
	.fb_cursor	= soft_cursor,
	.fb_sync	= hpfb_sync,
};

/* Common to all HP framebuffers */
#define HPFB_FBWMSB	0x05	/* Frame buffer width 		*/
#define HPFB_FBWLSB	0x07
#define HPFB_FBHMSB	0x09	/* Frame buffer height		*/
#define HPFB_FBHLSB	0x0b
#define HPFB_DWMSB	0x0d	/* Display width		*/
#define HPFB_DWLSB	0x0f
#define HPFB_DHMSB	0x11	/* Display height		*/
#define HPFB_DHLSB	0x13
#define HPFB_NUMPLANES	0x5b	/* Number of colour planes	*/
#define HPFB_FBOMSB	0x5d	/* Frame buffer offset		*/
#define HPFB_FBOLSB	0x5f

static int __init hpfb_init_one(unsigned long phys_base, unsigned long virt_base)
{
	unsigned long fboff, fb_width, fb_height, fb_start;

	fb_regs = virt_base;
	fboff = (in_8(fb_regs + HPFB_FBOMSB) << 8) | in_8(fb_regs + HPFB_FBOLSB);

	fb_info.fix.smem_start = (in_8(fb_regs + fboff) << 16);

	if (phys_base >= DIOII_BASE) {
		fb_info.fix.smem_start += phys_base;
	}

	if (DIO_SECID(fb_regs) != DIO_ID2_TOPCAT) {
		/* This is the magic incantation the HP X server uses to make Catseye boards work. */
		while (in_be16(fb_regs+0x4800) & 1)
			;
		out_be16(fb_regs+0x4800, 0);	/* Catseye status */
		out_be16(fb_regs+0x4510, 0);	/* VB */
		out_be16(fb_regs+0x4512, 0);	/* TCNTRL */
		out_be16(fb_regs+0x4514, 0);	/* ACNTRL */
		out_be16(fb_regs+0x4516, 0);	/* PNCNTRL */
		out_be16(fb_regs+0x4206, 0x90);	/* RUG Command/Status */
		out_be16(fb_regs+0x60a2, 0);	/* Overlay Mask */
		out_be16(fb_regs+0x60bc, 0);	/* Ram Select */
	}

	/*
	 *	Fill in the available video resolution
	 */
	fb_width = (in_8(fb_regs + HPFB_FBWMSB) << 8) | in_8(fb_regs + HPFB_FBWLSB);
	fb_info.fix.line_length = fb_width;
	fb_height = (in_8(fb_regs + HPFB_FBHMSB) << 8) | in_8(fb_regs + HPFB_FBHLSB);
	fb_info.fix.smem_len = fb_width * fb_height;
	fb_start = (unsigned long)ioremap_writethrough(fb_info.fix.smem_start,
						       fb_info.fix.smem_len);
	hpfb_defined.xres = (in_8(fb_regs + HPFB_DWMSB) << 8) | in_8(fb_regs + HPFB_DWLSB);
	hpfb_defined.yres = (in_8(fb_regs + HPFB_DHMSB) << 8) | in_8(fb_regs + HPFB_DHLSB);
	hpfb_defined.xres_virtual = hpfb_defined.xres;
	hpfb_defined.yres_virtual = hpfb_defined.yres;
	hpfb_defined.bits_per_pixel = in_8(fb_regs + HPFB_NUMPLANES);

	printk(KERN_INFO "hpfb: framebuffer at 0x%lx, mapped to 0x%lx, size %dk\n",
	       fb_info.fix.smem_start, fb_start, fb_info.fix.smem_len/1024);
	printk(KERN_INFO "hpfb: mode is %dx%dx%d, linelength=%d\n",
	       hpfb_defined.xres, hpfb_defined.yres, hpfb_defined.bits_per_pixel, fb_info.fix.line_length);

	/*
	 *	Give the hardware a bit of a prod and work out how many bits per
	 *	pixel are supported.
	 */
	out_8(fb_regs + TC_WEN, 0xff);
	out_8(fb_regs + TC_PRR, RR_COPY);
	out_8(fb_regs + TC_FBEN, 0xff);
	out_8(fb_start, 0xff);
	fb_bitmask = in_8(fb_start);
	out_8(fb_start, 0);

	/*
	 *	Enable reading/writing of all the planes.
	 */
	out_8(fb_regs + TC_WEN, fb_bitmask);
	out_8(fb_regs + TC_PRR, RR_COPY);
	out_8(fb_regs + TC_REN, fb_bitmask);
	out_8(fb_regs + TC_FBEN, fb_bitmask);

	/*
	 *	Clear the screen.
	 */
	topcat_blit(0, 0, 0, 0, fb_width, fb_height, RR_CLEAR);

	/*
	 *	Let there be consoles..
	 */
	if (DIO_SECID(fb_regs) == DIO_ID2_TOPCAT)
		strcat(fb_info.fix.id, "Topcat");
	else
		strcat(fb_info.fix.id, "Catseye");
	fb_info.fbops = &hpfb_ops;
	fb_info.flags = FBINFO_DEFAULT;
	fb_info.var   = hpfb_defined;
	fb_info.screen_base = (char *)fb_start;

	fb_alloc_cmap(&fb_info.cmap, 1 << hpfb_defined.bits_per_pixel, 0);

	if (register_framebuffer(&fb_info) < 0) {
		fb_dealloc_cmap(&fb_info.cmap);
		return 1;
	}

	printk(KERN_INFO "fb%d: %s frame buffer device\n",
	       fb_info.node, fb_info.fix.id);

	return 0;
}

/* 
 * Check that the secondary ID indicates that we have some hope of working with this
 * framebuffer.  The catseye boards are pretty much like topcats and we can muddle through.
 */

#define topcat_sid_ok(x)  (((x) == DIO_ID2_LRCATSEYE) || ((x) == DIO_ID2_HRCCATSEYE)    \
			   || ((x) == DIO_ID2_HRMCATSEYE) || ((x) == DIO_ID2_TOPCAT))

/* 
 * Initialise the framebuffer
 */
static int __devinit hpfb_dio_probe(struct dio_dev * d, const struct dio_device_id * ent)
{
	unsigned long paddr, vaddr;

	paddr = d->resource.start;
	if (!request_mem_region(d->resource.start, d->resource.end - d->resource.start, d->name))
                return -EBUSY;

	if (d->scode >= DIOII_SCBASE) {
		vaddr = (unsigned long)ioremap(paddr, d->resource.end - d->resource.start);
	} else {
		vaddr = paddr + DIO_VIRADDRBASE;
	}
	printk(KERN_INFO "Topcat found at DIO select code %d "
	       "(secondary id %02x)\n", d->scode, (d->id >> 8) & 0xff);
	if (hpfb_init_one(paddr, vaddr)) {
		if (d->scode >= DIOII_SCBASE)
			iounmap((void *)vaddr);
		return -ENOMEM;
	}
	return 0;
}

static void __devexit hpfb_remove_one(struct dio_dev *d)
{
	unregister_framebuffer(&fb_info);
	if (d->scode >= DIOII_SCBASE)
		iounmap((void *)fb_regs);
        release_mem_region(d->resource.start, d->resource.end - d->resource.start);
}

static struct dio_device_id hpfb_dio_tbl[] = {
    { DIO_ENCODE_ID(DIO_ID_FBUFFER, DIO_ID2_LRCATSEYE) },
    { DIO_ENCODE_ID(DIO_ID_FBUFFER, DIO_ID2_HRCCATSEYE) },
    { DIO_ENCODE_ID(DIO_ID_FBUFFER, DIO_ID2_HRMCATSEYE) },
    { DIO_ENCODE_ID(DIO_ID_FBUFFER, DIO_ID2_TOPCAT) },
    { 0 }
};

static struct dio_driver hpfb_driver = {
    .name      = "hpfb",
    .id_table  = hpfb_dio_tbl,
    .probe     = hpfb_dio_probe,
    .remove    = __devexit_p(hpfb_remove_one),
};

int __init hpfb_init(void)
{
	unsigned int sid;
	mm_segment_t fs;
	unsigned char i;
	int err;

	/* Topcats can be on the internal IO bus or real DIO devices.
	 * The internal variant sits at 0x560000; it has primary
	 * and secondary ID registers just like the DIO version.
	 * So we merge the two detection routines.
	 *
	 * Perhaps this #define should be in a global header file:
	 * I believe it's common to all internal fbs, not just topcat.
	 */
#define INTFBVADDR 0xf0560000
#define INTFBPADDR 0x560000

	if (!MACH_IS_HP300)
		return -ENXIO;

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

	dio_module_init(&hpfb_driver);

	fs = get_fs();
	set_fs(KERNEL_DS);
	err = get_user(i, (unsigned char *)INTFBVADDR + DIO_IDOFF);
	set_fs(fs);

	if (!err && (i == DIO_ID_FBUFFER) && topcat_sid_ok(sid = DIO_SECID(INTFBVADDR))) {
		if (!request_mem_region(INTFBPADDR, DIO_DEVSIZE, "Internal Topcat"))
			return -EBUSY;
		printk(KERN_INFO "Internal Topcat found (secondary id %02x)\n", sid);
		if (hpfb_init_one(INTFBPADDR, INTFBVADDR)) {
			return -ENOMEM;
		}
	}
	return 0;
}

void __exit hpfb_cleanup_module(void)
{
	dio_unregister_driver(&hpfb_driver);
}

module_init(hpfb_init);
module_exit(hpfb_cleanup_module);

MODULE_LICENSE("GPL");