summaryrefslogtreecommitdiff
path: root/drivers/video/fbdev/p9100.c
blob: 6da672e92643b8d4a38682ec29fec31339b2ade9 (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
// SPDX-License-Identifier: GPL-2.0-only
/* p9100.c: P9100 frame buffer driver
 *
 * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
 * Copyright 1999 Derrick J Brashear (shadow@dementia.org)
 *
 * 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/delay.h>
#include <linux/init.h>
#include <linux/fb.h>
#include <linux/mm.h>
#include <linux/of_device.h>

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

#include "sbuslib.h"

/*
 * Local functions.
 */

static int p9100_setcolreg(unsigned, unsigned, unsigned, unsigned,
			   unsigned, struct fb_info *);
static int p9100_blank(int, struct fb_info *);

static int p9100_mmap(struct fb_info *, struct vm_area_struct *);
static int p9100_ioctl(struct fb_info *, unsigned int, unsigned long);

/*
 *  Frame buffer operations
 */

static const struct fb_ops p9100_ops = {
	.owner			= THIS_MODULE,
	.fb_setcolreg		= p9100_setcolreg,
	.fb_blank		= p9100_blank,
	.fb_fillrect		= cfb_fillrect,
	.fb_copyarea		= cfb_copyarea,
	.fb_imageblit		= cfb_imageblit,
	.fb_mmap		= p9100_mmap,
	.fb_ioctl		= p9100_ioctl,
#ifdef CONFIG_COMPAT
	.fb_compat_ioctl	= sbusfb_compat_ioctl,
#endif
};

/* P9100 control registers */
#define P9100_SYSCTL_OFF	0x0UL
#define P9100_VIDEOCTL_OFF	0x100UL
#define P9100_VRAMCTL_OFF 	0x180UL
#define P9100_RAMDAC_OFF 	0x200UL
#define P9100_VIDEOCOPROC_OFF 	0x400UL

/* P9100 command registers */
#define P9100_CMD_OFF 0x0UL

/* P9100 framebuffer memory */
#define P9100_FB_OFF 0x0UL

/* 3 bits: 2=8bpp 3=16bpp 5=32bpp 7=24bpp */
#define SYS_CONFIG_PIXELSIZE_SHIFT 26 

#define SCREENPAINT_TIMECTL1_ENABLE_VIDEO 0x20 /* 0 = off, 1 = on */

struct p9100_regs {
	/* Registers for the system control */
	u32 sys_base;
	u32 sys_config;
	u32 sys_intr;
	u32 sys_int_ena;
	u32 sys_alt_rd;
	u32 sys_alt_wr;
	u32 sys_xxx[58];

	/* Registers for the video control */
	u32 vid_base;
	u32 vid_hcnt;
	u32 vid_htotal;
	u32 vid_hsync_rise;
	u32 vid_hblank_rise;
	u32 vid_hblank_fall;
	u32 vid_hcnt_preload;
	u32 vid_vcnt;
	u32 vid_vlen;
	u32 vid_vsync_rise;
	u32 vid_vblank_rise;
	u32 vid_vblank_fall;
	u32 vid_vcnt_preload;
	u32 vid_screenpaint_addr;
	u32 vid_screenpaint_timectl1;
	u32 vid_screenpaint_qsfcnt;
	u32 vid_screenpaint_timectl2;
	u32 vid_xxx[15];

	/* Registers for the video control */
	u32 vram_base;
	u32 vram_memcfg;
	u32 vram_refresh_pd;
	u32 vram_refresh_cnt;
	u32 vram_raslo_max;
	u32 vram_raslo_cur;
	u32 pwrup_cfg;
	u32 vram_xxx[25];

	/* Registers for IBM RGB528 Palette */
	u32 ramdac_cmap_wridx; 
	u32 ramdac_palette_data;
	u32 ramdac_pixel_mask;
	u32 ramdac_palette_rdaddr;
	u32 ramdac_idx_lo;
	u32 ramdac_idx_hi;
	u32 ramdac_idx_data;
	u32 ramdac_idx_ctl;
	u32 ramdac_xxx[1784];
};

struct p9100_cmd_parameng {
	u32 parameng_status;
	u32 parameng_bltcmd;
	u32 parameng_quadcmd;
};

struct p9100_par {
	spinlock_t		lock;
	struct p9100_regs	__iomem *regs;

	u32			flags;
#define P9100_FLAG_BLANKED	0x00000001

	unsigned long		which_io;
};

/**
 *      p9100_setcolreg - Optional function. Sets a color register.
 *      @regno: boolean, 0 copy local, 1 get_user() function
 *      @red: frame buffer colormap structure
 *      @green: The green value which can be up to 16 bits wide
 *      @blue:  The blue value which can be up to 16 bits wide.
 *      @transp: If supported the alpha value which can be up to 16 bits wide.
 *      @info: frame buffer info structure
 */
static int p9100_setcolreg(unsigned regno,
			   unsigned red, unsigned green, unsigned blue,
			   unsigned transp, struct fb_info *info)
{
	struct p9100_par *par = (struct p9100_par *) info->par;
	struct p9100_regs __iomem *regs = par->regs;
	unsigned long flags;

	if (regno >= 256)
		return 1;

	red >>= 8;
	green >>= 8;
	blue >>= 8;

	spin_lock_irqsave(&par->lock, flags);

	sbus_writel((regno << 16), &regs->ramdac_cmap_wridx);
	sbus_writel((red << 16), &regs->ramdac_palette_data);
	sbus_writel((green << 16), &regs->ramdac_palette_data);
	sbus_writel((blue << 16), &regs->ramdac_palette_data);

	spin_unlock_irqrestore(&par->lock, flags);

	return 0;
}

/**
 *      p9100_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
p9100_blank(int blank, struct fb_info *info)
{
	struct p9100_par *par = (struct p9100_par *) info->par;
	struct p9100_regs __iomem *regs = par->regs;
	unsigned long flags;
	u32 val;

	spin_lock_irqsave(&par->lock, flags);

	switch (blank) {
	case FB_BLANK_UNBLANK: /* Unblanking */
		val = sbus_readl(&regs->vid_screenpaint_timectl1);
		val |= SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
		sbus_writel(val, &regs->vid_screenpaint_timectl1);
		par->flags &= ~P9100_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_readl(&regs->vid_screenpaint_timectl1);
		val &= ~SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
		sbus_writel(val, &regs->vid_screenpaint_timectl1);
		par->flags |= P9100_FLAG_BLANKED;
		break;
	}

	spin_unlock_irqrestore(&par->lock, flags);

	return 0;
}

static struct sbus_mmap_map p9100_mmap_map[] = {
	{ CG3_MMAP_OFFSET,	0,		SBUS_MMAP_FBSIZE(1) },
	{ 0,			0,		0		    }
};

static int p9100_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
	struct p9100_par *par = (struct p9100_par *)info->par;

	return sbusfb_mmap_helper(p9100_mmap_map,
				  info->fix.smem_start, info->fix.smem_len,
				  par->which_io, vma);
}

static int p9100_ioctl(struct fb_info *info, unsigned int cmd,
		       unsigned long arg)
{
	/* Make it look like a cg3. */
	return sbusfb_ioctl_helper(cmd, arg, info,
				   FBTYPE_SUN3COLOR, 8, info->fix.smem_len);
}

/*
 *  Initialisation
 */

static void p9100_init_fix(struct fb_info *info, int linebytes, struct device_node *dp)
{
	snprintf(info->fix.id, sizeof(info->fix.id), "%pOFn", dp);

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

	info->fix.line_length = linebytes;

	info->fix.accel = FB_ACCEL_SUN_CGTHREE;
}

static int p9100_probe(struct platform_device *op)
{
	struct device_node *dp = op->dev.of_node;
	struct fb_info *info;
	struct p9100_par *par;
	int linebytes, err;

	info = framebuffer_alloc(sizeof(struct p9100_par), &op->dev);

	err = -ENOMEM;
	if (!info)
		goto out_err;
	par = info->par;

	spin_lock_init(&par->lock);

	/* This is the framebuffer and the only resource apps can mmap.  */
	info->fix.smem_start = op->resource[2].start;
	par->which_io = op->resource[2].flags & IORESOURCE_BITS;

	sbusfb_fill_var(&info->var, dp, 8);
	info->var.red.length = 8;
	info->var.green.length = 8;
	info->var.blue.length = 8;

	linebytes = of_getintprop_default(dp, "linebytes", info->var.xres);
	info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres);

	par->regs = of_ioremap(&op->resource[0], 0,
			       sizeof(struct p9100_regs), "p9100 regs");
	if (!par->regs)
		goto out_release_fb;

	info->flags = FBINFO_DEFAULT;
	info->fbops = &p9100_ops;
	info->screen_base = of_ioremap(&op->resource[2], 0,
				       info->fix.smem_len, "p9100 ram");
	if (!info->screen_base)
		goto out_unmap_regs;

	p9100_blank(FB_BLANK_UNBLANK, info);

	if (fb_alloc_cmap(&info->cmap, 256, 0))
		goto out_unmap_screen;

	p9100_init_fix(info, linebytes, dp);

	err = register_framebuffer(info);
	if (err < 0)
		goto out_dealloc_cmap;

	fb_set_cmap(&info->cmap, info);

	dev_set_drvdata(&op->dev, info);

	printk(KERN_INFO "%pOF: p9100 at %lx:%lx\n",
	       dp,
	       par->which_io, info->fix.smem_start);

	return 0;

out_dealloc_cmap:
	fb_dealloc_cmap(&info->cmap);

out_unmap_screen:
	of_iounmap(&op->resource[2], info->screen_base, info->fix.smem_len);

out_unmap_regs:
	of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs));

out_release_fb:
	framebuffer_release(info);

out_err:
	return err;
}

static int p9100_remove(struct platform_device *op)
{
	struct fb_info *info = dev_get_drvdata(&op->dev);
	struct p9100_par *par = info->par;

	unregister_framebuffer(info);
	fb_dealloc_cmap(&info->cmap);

	of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs));
	of_iounmap(&op->resource[2], info->screen_base, info->fix.smem_len);

	framebuffer_release(info);

	return 0;
}

static const struct of_device_id p9100_match[] = {
	{
		.name = "p9100",
	},
	{},
};
MODULE_DEVICE_TABLE(of, p9100_match);

static struct platform_driver p9100_driver = {
	.driver = {
		.name = "p9100",
		.of_match_table = p9100_match,
	},
	.probe		= p9100_probe,
	.remove		= p9100_remove,
};

static int __init p9100_init(void)
{
	if (fb_get_options("p9100fb", NULL))
		return -ENODEV;

	return platform_driver_register(&p9100_driver);
}

static void __exit p9100_exit(void)
{
	platform_driver_unregister(&p9100_driver);
}

module_init(p9100_init);
module_exit(p9100_exit);

MODULE_DESCRIPTION("framebuffer driver for P9100 chipsets");
MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
MODULE_VERSION("2.0");
MODULE_LICENSE("GPL");