Merge git://git.skbuff.net/gitroot/yoshfuji/linux-2.6.14+advapi-fix/
[linux-2.6] / drivers / video / p9100.c
1 /* p9100.c: P9100 frame buffer driver
2  *
3  * Copyright (C) 2003 David S. Miller (davem@redhat.com)
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
19 #include <asm/io.h>
20 #include <asm/sbus.h>
21 #include <asm/oplib.h>
22 #include <asm/fbio.h>
23
24 #include "sbuslib.h"
25
26 /*
27  * Local functions.
28  */
29
30 static int p9100_setcolreg(unsigned, unsigned, unsigned, unsigned,
31                            unsigned, struct fb_info *);
32 static int p9100_blank(int, struct fb_info *);
33
34 static int p9100_mmap(struct fb_info *, struct file *, struct vm_area_struct *);
35 static int p9100_ioctl(struct inode *, struct file *, unsigned int,
36                        unsigned long, struct fb_info *);
37
38 /*
39  *  Frame buffer operations
40  */
41
42 static struct fb_ops p9100_ops = {
43         .owner                  = THIS_MODULE,
44         .fb_setcolreg           = p9100_setcolreg,
45         .fb_blank               = p9100_blank,
46         .fb_fillrect            = cfb_fillrect,
47         .fb_copyarea            = cfb_copyarea,
48         .fb_imageblit           = cfb_imageblit,
49         .fb_mmap                = p9100_mmap,
50         .fb_ioctl               = p9100_ioctl,
51 #ifdef CONFIG_COMPAT
52         .fb_compat_ioctl        = sbusfb_compat_ioctl,
53 #endif
54 };
55
56 /* P9100 control registers */
57 #define P9100_SYSCTL_OFF        0x0UL
58 #define P9100_VIDEOCTL_OFF      0x100UL
59 #define P9100_VRAMCTL_OFF       0x180UL
60 #define P9100_RAMDAC_OFF        0x200UL
61 #define P9100_VIDEOCOPROC_OFF   0x400UL
62
63 /* P9100 command registers */
64 #define P9100_CMD_OFF 0x0UL
65
66 /* P9100 framebuffer memory */
67 #define P9100_FB_OFF 0x0UL
68
69 /* 3 bits: 2=8bpp 3=16bpp 5=32bpp 7=24bpp */
70 #define SYS_CONFIG_PIXELSIZE_SHIFT 26 
71
72 #define SCREENPAINT_TIMECTL1_ENABLE_VIDEO 0x20 /* 0 = off, 1 = on */
73
74 struct p9100_regs {
75         /* Registers for the system control */
76         volatile u32 sys_base;
77         volatile u32 sys_config;
78         volatile u32 sys_intr;
79         volatile u32 sys_int_ena;
80         volatile u32 sys_alt_rd;
81         volatile u32 sys_alt_wr;
82         volatile u32 sys_xxx[58];
83
84         /* Registers for the video control */
85         volatile u32 vid_base;
86         volatile u32 vid_hcnt;
87         volatile u32 vid_htotal;
88         volatile u32 vid_hsync_rise;
89         volatile u32 vid_hblank_rise;
90         volatile u32 vid_hblank_fall;
91         volatile u32 vid_hcnt_preload;
92         volatile u32 vid_vcnt;
93         volatile u32 vid_vlen;
94         volatile u32 vid_vsync_rise;
95         volatile u32 vid_vblank_rise;
96         volatile u32 vid_vblank_fall;
97         volatile u32 vid_vcnt_preload;
98         volatile u32 vid_screenpaint_addr;
99         volatile u32 vid_screenpaint_timectl1;
100         volatile u32 vid_screenpaint_qsfcnt;
101         volatile u32 vid_screenpaint_timectl2;
102         volatile u32 vid_xxx[15];
103
104         /* Registers for the video control */
105         volatile u32 vram_base;
106         volatile u32 vram_memcfg;
107         volatile u32 vram_refresh_pd;
108         volatile u32 vram_refresh_cnt;
109         volatile u32 vram_raslo_max;
110         volatile u32 vram_raslo_cur;
111         volatile u32 pwrup_cfg;
112         volatile u32 vram_xxx[25];
113
114         /* Registers for IBM RGB528 Palette */
115         volatile u32 ramdac_cmap_wridx; 
116         volatile u32 ramdac_palette_data;
117         volatile u32 ramdac_pixel_mask;
118         volatile u32 ramdac_palette_rdaddr;
119         volatile u32 ramdac_idx_lo;
120         volatile u32 ramdac_idx_hi;
121         volatile u32 ramdac_idx_data;
122         volatile u32 ramdac_idx_ctl;
123         volatile u32 ramdac_xxx[1784];
124 };
125
126 struct p9100_cmd_parameng {
127         volatile u32 parameng_status;
128         volatile u32 parameng_bltcmd;
129         volatile u32 parameng_quadcmd;
130 };
131
132 struct p9100_par {
133         spinlock_t              lock;
134         struct p9100_regs       __iomem *regs;
135
136         u32                     flags;
137 #define P9100_FLAG_BLANKED      0x00000001
138
139         unsigned long           physbase;
140         unsigned long           fbsize;
141
142         struct sbus_dev         *sdev;
143         struct list_head        list;
144 };
145
146 /**
147  *      p9100_setcolreg - Optional function. Sets a color register.
148  *      @regno: boolean, 0 copy local, 1 get_user() function
149  *      @red: frame buffer colormap structure
150  *      @green: The green value which can be up to 16 bits wide
151  *      @blue:  The blue value which can be up to 16 bits wide.
152  *      @transp: If supported the alpha value which can be up to 16 bits wide.
153  *      @info: frame buffer info structure
154  */
155 static int p9100_setcolreg(unsigned regno,
156                            unsigned red, unsigned green, unsigned blue,
157                            unsigned transp, struct fb_info *info)
158 {
159         struct p9100_par *par = (struct p9100_par *) info->par;
160         struct p9100_regs __iomem *regs = par->regs;
161         unsigned long flags;
162
163         if (regno >= 256)
164                 return 1;
165
166         red >>= 8;
167         green >>= 8;
168         blue >>= 8;
169
170         spin_lock_irqsave(&par->lock, flags);
171
172         sbus_writel((regno << 16), &regs->ramdac_cmap_wridx);
173         sbus_writel((red << 16), &regs->ramdac_palette_data);
174         sbus_writel((green << 16), &regs->ramdac_palette_data);
175         sbus_writel((blue << 16), &regs->ramdac_palette_data);
176
177         spin_unlock_irqrestore(&par->lock, flags);
178
179         return 0;
180 }
181
182 /**
183  *      p9100_blank - Optional function.  Blanks the display.
184  *      @blank_mode: the blank mode we want.
185  *      @info: frame buffer structure that represents a single frame buffer
186  */
187 static int
188 p9100_blank(int blank, struct fb_info *info)
189 {
190         struct p9100_par *par = (struct p9100_par *) info->par;
191         struct p9100_regs __iomem *regs = par->regs;
192         unsigned long flags;
193         u32 val;
194
195         spin_lock_irqsave(&par->lock, flags);
196
197         switch (blank) {
198         case FB_BLANK_UNBLANK: /* Unblanking */
199                 val = sbus_readl(&regs->vid_screenpaint_timectl1);
200                 val |= SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
201                 sbus_writel(val, &regs->vid_screenpaint_timectl1);
202                 par->flags &= ~P9100_FLAG_BLANKED;
203                 break;
204
205         case FB_BLANK_NORMAL: /* Normal blanking */
206         case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
207         case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
208         case FB_BLANK_POWERDOWN: /* Poweroff */
209                 val = sbus_readl(&regs->vid_screenpaint_timectl1);
210                 val &= ~SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
211                 sbus_writel(val, &regs->vid_screenpaint_timectl1);
212                 par->flags |= P9100_FLAG_BLANKED;
213                 break;
214         }
215
216         spin_unlock_irqrestore(&par->lock, flags);
217
218         return 0;
219 }
220
221 static struct sbus_mmap_map p9100_mmap_map[] = {
222         { CG3_MMAP_OFFSET,      0,              SBUS_MMAP_FBSIZE(1) },
223         { 0,                    0,              0                   }
224 };
225
226 static int p9100_mmap(struct fb_info *info, struct file *file, struct vm_area_struct *vma)
227 {
228         struct p9100_par *par = (struct p9100_par *)info->par;
229
230         return sbusfb_mmap_helper(p9100_mmap_map,
231                                   par->physbase, par->fbsize,
232                                   par->sdev->reg_addrs[0].which_io,
233                                   vma);
234 }
235
236 static int p9100_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
237                        unsigned long arg, struct fb_info *info)
238 {
239         struct p9100_par *par = (struct p9100_par *) info->par;
240
241         /* Make it look like a cg3. */
242         return sbusfb_ioctl_helper(cmd, arg, info,
243                                    FBTYPE_SUN3COLOR, 8, par->fbsize);
244 }
245
246 /*
247  *  Initialisation
248  */
249
250 static void
251 p9100_init_fix(struct fb_info *info, int linebytes)
252 {
253         struct p9100_par *par = (struct p9100_par *)info->par;
254
255         strlcpy(info->fix.id, par->sdev->prom_name, sizeof(info->fix.id));
256
257         info->fix.type = FB_TYPE_PACKED_PIXELS;
258         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
259
260         info->fix.line_length = linebytes;
261
262         info->fix.accel = FB_ACCEL_SUN_CGTHREE;
263 }
264
265 struct all_info {
266         struct fb_info info;
267         struct p9100_par par;
268         struct list_head list;
269 };
270 static LIST_HEAD(p9100_list);
271
272 static void p9100_init_one(struct sbus_dev *sdev)
273 {
274         struct all_info *all;
275         int linebytes;
276
277         all = kmalloc(sizeof(*all), GFP_KERNEL);
278         if (!all) {
279                 printk(KERN_ERR "p9100: Cannot allocate memory.\n");
280                 return;
281         }
282         memset(all, 0, sizeof(*all));
283
284         INIT_LIST_HEAD(&all->list);
285
286         spin_lock_init(&all->par.lock);
287         all->par.sdev = sdev;
288
289         /* This is the framebuffer and the only resource apps can mmap.  */
290         all->par.physbase = sdev->reg_addrs[2].phys_addr;
291
292         sbusfb_fill_var(&all->info.var, sdev->prom_node, 8);
293         all->info.var.red.length = 8;
294         all->info.var.green.length = 8;
295         all->info.var.blue.length = 8;
296
297         linebytes = prom_getintdefault(sdev->prom_node, "linebytes",
298                                        all->info.var.xres);
299         all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);
300
301         all->par.regs = sbus_ioremap(&sdev->resource[0], 0,
302                              sizeof(struct p9100_regs), "p9100 regs");
303
304         all->info.flags = FBINFO_DEFAULT;
305         all->info.fbops = &p9100_ops;
306 #ifdef CONFIG_SPARC32
307         all->info.screen_base = (char __iomem *)
308                 prom_getintdefault(sdev->prom_node, "address", 0);
309 #endif
310         if (!all->info.screen_base)
311                 all->info.screen_base = sbus_ioremap(&sdev->resource[2], 0,
312                                      all->par.fbsize, "p9100 ram");
313         all->info.par = &all->par;
314
315         p9100_blank(0, &all->info);
316
317         if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
318                 printk(KERN_ERR "p9100: Could not allocate color map.\n");
319                 kfree(all);
320                 return;
321         }
322
323         p9100_init_fix(&all->info, linebytes);
324
325         if (register_framebuffer(&all->info) < 0) {
326                 printk(KERN_ERR "p9100: Could not register framebuffer.\n");
327                 fb_dealloc_cmap(&all->info.cmap);
328                 kfree(all);
329                 return;
330         }
331         fb_set_cmap(&all->info.cmap, &all->info);
332
333         list_add(&all->list, &p9100_list);
334
335         printk("p9100: %s at %lx:%lx\n",
336                sdev->prom_name,
337                (long) sdev->reg_addrs[0].which_io,
338                (long) sdev->reg_addrs[0].phys_addr);
339 }
340
341 int __init p9100_init(void)
342 {
343         struct sbus_bus *sbus;
344         struct sbus_dev *sdev;
345
346         if (fb_get_options("p9100fb", NULL))
347                 return -ENODEV;
348
349         for_all_sbusdev(sdev, sbus) {
350                 if (!strcmp(sdev->prom_name, "p9100"))
351                         p9100_init_one(sdev);
352         }
353
354         return 0;
355 }
356
357 void __exit p9100_exit(void)
358 {
359         struct list_head *pos, *tmp;
360
361         list_for_each_safe(pos, tmp, &p9100_list) {
362                 struct all_info *all = list_entry(pos, typeof(*all), list);
363
364                 unregister_framebuffer(&all->info);
365                 fb_dealloc_cmap(&all->info.cmap);
366                 kfree(all);
367         }
368 }
369
370 int __init
371 p9100_setup(char *arg)
372 {
373         /* No cmdline options yet... */
374         return 0;
375 }
376
377 module_init(p9100_init);
378
379 #ifdef MODULE
380 module_exit(p9100_exit);
381 #endif
382
383 MODULE_DESCRIPTION("framebuffer driver for P9100 chipsets");
384 MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
385 MODULE_LICENSE("GPL");