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