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[linux-2.6.git] / drivers / video / p9100.c
1 /* p9100.c: P9100 frame buffer driver
2  *
3  * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
4  * Copyright 1999 Derrick J Brashear (shadow@dementia.org)
5  *
6  * Driver layout based loosely on tgafb.c, see that file for credits.
7  */
8
9 #include <linux/module.h>
10 #include <linux/kernel.h>
11 #include <linux/errno.h>
12 #include <linux/string.h>
13 #include <linux/slab.h>
14 #include <linux/delay.h>
15 #include <linux/init.h>
16 #include <linux/fb.h>
17 #include <linux/mm.h>
18 #include <linux/of_device.h>
19
20 #include <asm/io.h>
21 #include <asm/fbio.h>
22
23 #include "sbuslib.h"
24
25 /*
26  * Local functions.
27  */
28
29 static int p9100_setcolreg(unsigned, unsigned, unsigned, unsigned,
30                            unsigned, struct fb_info *);
31 static int p9100_blank(int, struct fb_info *);
32
33 static int p9100_mmap(struct fb_info *, struct vm_area_struct *);
34 static int p9100_ioctl(struct fb_info *, unsigned int, unsigned long);
35
36 /*
37  *  Frame buffer operations
38  */
39
40 static struct fb_ops p9100_ops = {
41         .owner                  = THIS_MODULE,
42         .fb_setcolreg           = p9100_setcolreg,
43         .fb_blank               = p9100_blank,
44         .fb_fillrect            = cfb_fillrect,
45         .fb_copyarea            = cfb_copyarea,
46         .fb_imageblit           = cfb_imageblit,
47         .fb_mmap                = p9100_mmap,
48         .fb_ioctl               = p9100_ioctl,
49 #ifdef CONFIG_COMPAT
50         .fb_compat_ioctl        = sbusfb_compat_ioctl,
51 #endif
52 };
53
54 /* P9100 control registers */
55 #define P9100_SYSCTL_OFF        0x0UL
56 #define P9100_VIDEOCTL_OFF      0x100UL
57 #define P9100_VRAMCTL_OFF       0x180UL
58 #define P9100_RAMDAC_OFF        0x200UL
59 #define P9100_VIDEOCOPROC_OFF   0x400UL
60
61 /* P9100 command registers */
62 #define P9100_CMD_OFF 0x0UL
63
64 /* P9100 framebuffer memory */
65 #define P9100_FB_OFF 0x0UL
66
67 /* 3 bits: 2=8bpp 3=16bpp 5=32bpp 7=24bpp */
68 #define SYS_CONFIG_PIXELSIZE_SHIFT 26 
69
70 #define SCREENPAINT_TIMECTL1_ENABLE_VIDEO 0x20 /* 0 = off, 1 = on */
71
72 struct p9100_regs {
73         /* Registers for the system control */
74         u32 sys_base;
75         u32 sys_config;
76         u32 sys_intr;
77         u32 sys_int_ena;
78         u32 sys_alt_rd;
79         u32 sys_alt_wr;
80         u32 sys_xxx[58];
81
82         /* Registers for the video control */
83         u32 vid_base;
84         u32 vid_hcnt;
85         u32 vid_htotal;
86         u32 vid_hsync_rise;
87         u32 vid_hblank_rise;
88         u32 vid_hblank_fall;
89         u32 vid_hcnt_preload;
90         u32 vid_vcnt;
91         u32 vid_vlen;
92         u32 vid_vsync_rise;
93         u32 vid_vblank_rise;
94         u32 vid_vblank_fall;
95         u32 vid_vcnt_preload;
96         u32 vid_screenpaint_addr;
97         u32 vid_screenpaint_timectl1;
98         u32 vid_screenpaint_qsfcnt;
99         u32 vid_screenpaint_timectl2;
100         u32 vid_xxx[15];
101
102         /* Registers for the video control */
103         u32 vram_base;
104         u32 vram_memcfg;
105         u32 vram_refresh_pd;
106         u32 vram_refresh_cnt;
107         u32 vram_raslo_max;
108         u32 vram_raslo_cur;
109         u32 pwrup_cfg;
110         u32 vram_xxx[25];
111
112         /* Registers for IBM RGB528 Palette */
113         u32 ramdac_cmap_wridx; 
114         u32 ramdac_palette_data;
115         u32 ramdac_pixel_mask;
116         u32 ramdac_palette_rdaddr;
117         u32 ramdac_idx_lo;
118         u32 ramdac_idx_hi;
119         u32 ramdac_idx_data;
120         u32 ramdac_idx_ctl;
121         u32 ramdac_xxx[1784];
122 };
123
124 struct p9100_cmd_parameng {
125         u32 parameng_status;
126         u32 parameng_bltcmd;
127         u32 parameng_quadcmd;
128 };
129
130 struct p9100_par {
131         spinlock_t              lock;
132         struct p9100_regs       __iomem *regs;
133
134         u32                     flags;
135 #define P9100_FLAG_BLANKED      0x00000001
136
137         unsigned long           physbase;
138         unsigned long           which_io;
139         unsigned long           fbsize;
140 };
141
142 /**
143  *      p9100_setcolreg - Optional function. Sets a color register.
144  *      @regno: boolean, 0 copy local, 1 get_user() function
145  *      @red: frame buffer colormap structure
146  *      @green: The green value which can be up to 16 bits wide
147  *      @blue:  The blue value which can be up to 16 bits wide.
148  *      @transp: If supported the alpha value which can be up to 16 bits wide.
149  *      @info: frame buffer info structure
150  */
151 static int p9100_setcolreg(unsigned regno,
152                            unsigned red, unsigned green, unsigned blue,
153                            unsigned transp, struct fb_info *info)
154 {
155         struct p9100_par *par = (struct p9100_par *) info->par;
156         struct p9100_regs __iomem *regs = par->regs;
157         unsigned long flags;
158
159         if (regno >= 256)
160                 return 1;
161
162         red >>= 8;
163         green >>= 8;
164         blue >>= 8;
165
166         spin_lock_irqsave(&par->lock, flags);
167
168         sbus_writel((regno << 16), &regs->ramdac_cmap_wridx);
169         sbus_writel((red << 16), &regs->ramdac_palette_data);
170         sbus_writel((green << 16), &regs->ramdac_palette_data);
171         sbus_writel((blue << 16), &regs->ramdac_palette_data);
172
173         spin_unlock_irqrestore(&par->lock, flags);
174
175         return 0;
176 }
177
178 /**
179  *      p9100_blank - Optional function.  Blanks the display.
180  *      @blank_mode: the blank mode we want.
181  *      @info: frame buffer structure that represents a single frame buffer
182  */
183 static int
184 p9100_blank(int blank, struct fb_info *info)
185 {
186         struct p9100_par *par = (struct p9100_par *) info->par;
187         struct p9100_regs __iomem *regs = par->regs;
188         unsigned long flags;
189         u32 val;
190
191         spin_lock_irqsave(&par->lock, flags);
192
193         switch (blank) {
194         case FB_BLANK_UNBLANK: /* Unblanking */
195                 val = sbus_readl(&regs->vid_screenpaint_timectl1);
196                 val |= SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
197                 sbus_writel(val, &regs->vid_screenpaint_timectl1);
198                 par->flags &= ~P9100_FLAG_BLANKED;
199                 break;
200
201         case FB_BLANK_NORMAL: /* Normal blanking */
202         case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
203         case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
204         case FB_BLANK_POWERDOWN: /* Poweroff */
205                 val = sbus_readl(&regs->vid_screenpaint_timectl1);
206                 val &= ~SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
207                 sbus_writel(val, &regs->vid_screenpaint_timectl1);
208                 par->flags |= P9100_FLAG_BLANKED;
209                 break;
210         }
211
212         spin_unlock_irqrestore(&par->lock, flags);
213
214         return 0;
215 }
216
217 static struct sbus_mmap_map p9100_mmap_map[] = {
218         { CG3_MMAP_OFFSET,      0,              SBUS_MMAP_FBSIZE(1) },
219         { 0,                    0,              0                   }
220 };
221
222 static int p9100_mmap(struct fb_info *info, struct vm_area_struct *vma)
223 {
224         struct p9100_par *par = (struct p9100_par *)info->par;
225
226         return sbusfb_mmap_helper(p9100_mmap_map,
227                                   par->physbase, par->fbsize,
228                                   par->which_io, vma);
229 }
230
231 static int p9100_ioctl(struct fb_info *info, unsigned int cmd,
232                        unsigned long arg)
233 {
234         struct p9100_par *par = (struct p9100_par *) info->par;
235
236         /* Make it look like a cg3. */
237         return sbusfb_ioctl_helper(cmd, arg, info,
238                                    FBTYPE_SUN3COLOR, 8, par->fbsize);
239 }
240
241 /*
242  *  Initialisation
243  */
244
245 static void p9100_init_fix(struct fb_info *info, int linebytes, struct device_node *dp)
246 {
247         strlcpy(info->fix.id, dp->name, sizeof(info->fix.id));
248
249         info->fix.type = FB_TYPE_PACKED_PIXELS;
250         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
251
252         info->fix.line_length = linebytes;
253
254         info->fix.accel = FB_ACCEL_SUN_CGTHREE;
255 }
256
257 static int __devinit p9100_probe(struct of_device *op, const struct of_device_id *match)
258 {
259         struct device_node *dp = op->node;
260         struct fb_info *info;
261         struct p9100_par *par;
262         int linebytes, err;
263
264         info = framebuffer_alloc(sizeof(struct p9100_par), &op->dev);
265
266         err = -ENOMEM;
267         if (!info)
268                 goto out_err;
269         par = info->par;
270
271         spin_lock_init(&par->lock);
272
273         /* This is the framebuffer and the only resource apps can mmap.  */
274         par->physbase = op->resource[2].start;
275         par->which_io = op->resource[2].flags & IORESOURCE_BITS;
276
277         sbusfb_fill_var(&info->var, dp, 8);
278         info->var.red.length = 8;
279         info->var.green.length = 8;
280         info->var.blue.length = 8;
281
282         linebytes = of_getintprop_default(dp, "linebytes", info->var.xres);
283         par->fbsize = PAGE_ALIGN(linebytes * info->var.yres);
284
285         par->regs = of_ioremap(&op->resource[0], 0,
286                                sizeof(struct p9100_regs), "p9100 regs");
287         if (!par->regs)
288                 goto out_release_fb;
289
290         info->flags = FBINFO_DEFAULT;
291         info->fbops = &p9100_ops;
292         info->screen_base = of_ioremap(&op->resource[2], 0,
293                                        par->fbsize, "p9100 ram");
294         if (!info->screen_base)
295                 goto out_unmap_regs;
296
297         p9100_blank(FB_BLANK_UNBLANK, info);
298
299         if (fb_alloc_cmap(&info->cmap, 256, 0))
300                 goto out_unmap_screen;
301
302         p9100_init_fix(info, linebytes, dp);
303
304         err = register_framebuffer(info);
305         if (err < 0)
306                 goto out_dealloc_cmap;
307
308         fb_set_cmap(&info->cmap, info);
309
310         dev_set_drvdata(&op->dev, info);
311
312         printk(KERN_INFO "%s: p9100 at %lx:%lx\n",
313                dp->full_name,
314                par->which_io, par->physbase);
315
316         return 0;
317
318 out_dealloc_cmap:
319         fb_dealloc_cmap(&info->cmap);
320
321 out_unmap_screen:
322         of_iounmap(&op->resource[2], info->screen_base, par->fbsize);
323
324 out_unmap_regs:
325         of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs));
326
327 out_release_fb:
328         framebuffer_release(info);
329
330 out_err:
331         return err;
332 }
333
334 static int __devexit p9100_remove(struct of_device *op)
335 {
336         struct fb_info *info = dev_get_drvdata(&op->dev);
337         struct p9100_par *par = info->par;
338
339         unregister_framebuffer(info);
340         fb_dealloc_cmap(&info->cmap);
341
342         of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs));
343         of_iounmap(&op->resource[2], info->screen_base, par->fbsize);
344
345         framebuffer_release(info);
346
347         dev_set_drvdata(&op->dev, NULL);
348
349         return 0;
350 }
351
352 static const struct of_device_id p9100_match[] = {
353         {
354                 .name = "p9100",
355         },
356         {},
357 };
358 MODULE_DEVICE_TABLE(of, p9100_match);
359
360 static struct of_platform_driver p9100_driver = {
361         .name           = "p9100",
362         .match_table    = p9100_match,
363         .probe          = p9100_probe,
364         .remove         = __devexit_p(p9100_remove),
365 };
366
367 static int __init p9100_init(void)
368 {
369         if (fb_get_options("p9100fb", NULL))
370                 return -ENODEV;
371
372         return of_register_driver(&p9100_driver, &of_bus_type);
373 }
374
375 static void __exit p9100_exit(void)
376 {
377         of_unregister_driver(&p9100_driver);
378 }
379
380 module_init(p9100_init);
381 module_exit(p9100_exit);
382
383 MODULE_DESCRIPTION("framebuffer driver for P9100 chipsets");
384 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
385 MODULE_VERSION("2.0");
386 MODULE_LICENSE("GPL");