[PATCH] nvidiafb: ioremap and i2c fixes
[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         .fb_cursor              = soft_cursor,
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         volatile u32 sys_base;
75         volatile u32 sys_config;
76         volatile u32 sys_intr;
77         volatile u32 sys_int_ena;
78         volatile u32 sys_alt_rd;
79         volatile u32 sys_alt_wr;
80         volatile u32 sys_xxx[58];
81
82         /* Registers for the video control */
83         volatile u32 vid_base;
84         volatile u32 vid_hcnt;
85         volatile u32 vid_htotal;
86         volatile u32 vid_hsync_rise;
87         volatile u32 vid_hblank_rise;
88         volatile u32 vid_hblank_fall;
89         volatile u32 vid_hcnt_preload;
90         volatile u32 vid_vcnt;
91         volatile u32 vid_vlen;
92         volatile u32 vid_vsync_rise;
93         volatile u32 vid_vblank_rise;
94         volatile u32 vid_vblank_fall;
95         volatile u32 vid_vcnt_preload;
96         volatile u32 vid_screenpaint_addr;
97         volatile u32 vid_screenpaint_timectl1;
98         volatile u32 vid_screenpaint_qsfcnt;
99         volatile u32 vid_screenpaint_timectl2;
100         volatile u32 vid_xxx[15];
101
102         /* Registers for the video control */
103         volatile u32 vram_base;
104         volatile u32 vram_memcfg;
105         volatile u32 vram_refresh_pd;
106         volatile u32 vram_refresh_cnt;
107         volatile u32 vram_raslo_max;
108         volatile u32 vram_raslo_cur;
109         volatile u32 pwrup_cfg;
110         volatile u32 vram_xxx[25];
111
112         /* Registers for IBM RGB528 Palette */
113         volatile u32 ramdac_cmap_wridx; 
114         volatile u32 ramdac_palette_data;
115         volatile u32 ramdac_pixel_mask;
116         volatile u32 ramdac_palette_rdaddr;
117         volatile u32 ramdac_idx_lo;
118         volatile u32 ramdac_idx_hi;
119         volatile u32 ramdac_idx_data;
120         volatile u32 ramdac_idx_ctl;
121         volatile u32 ramdac_xxx[1784];
122 };
123
124 struct p9100_cmd_parameng {
125         volatile u32 parameng_status;
126         volatile u32 parameng_bltcmd;
127         volatile 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           fbsize;
139
140         struct sbus_dev         *sdev;
141         struct list_head        list;
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 file *file, 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 inode *inode, struct file *file, unsigned int cmd,
235                        unsigned long arg, struct fb_info *info)
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
292         linebytes = prom_getintdefault(sdev->prom_node, "linebytes",
293                                        all->info.var.xres);
294         all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);
295
296         all->par.regs = sbus_ioremap(&sdev->resource[0], 0,
297                              sizeof(struct p9100_regs), "p9100 regs");
298
299         all->info.flags = FBINFO_DEFAULT;
300         all->info.fbops = &p9100_ops;
301 #ifdef CONFIG_SPARC32
302         all->info.screen_base = (char __iomem *)
303                 prom_getintdefault(sdev->prom_node, "address", 0);
304 #endif
305         if (!all->info.screen_base)
306                 all->info.screen_base = sbus_ioremap(&sdev->resource[2], 0,
307                                      all->par.fbsize, "p9100 ram");
308         all->info.par = &all->par;
309
310         p9100_blank(0, &all->info);
311
312         if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
313                 printk(KERN_ERR "p9100: Could not allocate color map.\n");
314                 kfree(all);
315                 return;
316         }
317
318         p9100_init_fix(&all->info, linebytes);
319
320         if (register_framebuffer(&all->info) < 0) {
321                 printk(KERN_ERR "p9100: Could not register framebuffer.\n");
322                 fb_dealloc_cmap(&all->info.cmap);
323                 kfree(all);
324                 return;
325         }
326
327         list_add(&all->list, &p9100_list);
328
329         printk("p9100: %s at %lx:%lx\n",
330                sdev->prom_name,
331                (long) sdev->reg_addrs[0].which_io,
332                (long) sdev->reg_addrs[0].phys_addr);
333 }
334
335 int __init p9100_init(void)
336 {
337         struct sbus_bus *sbus;
338         struct sbus_dev *sdev;
339
340         if (fb_get_options("p9100fb", NULL))
341                 return -ENODEV;
342
343         for_all_sbusdev(sdev, sbus) {
344                 if (!strcmp(sdev->prom_name, "p9100"))
345                         p9100_init_one(sdev);
346         }
347
348         return 0;
349 }
350
351 void __exit p9100_exit(void)
352 {
353         struct list_head *pos, *tmp;
354
355         list_for_each_safe(pos, tmp, &p9100_list) {
356                 struct all_info *all = list_entry(pos, typeof(*all), list);
357
358                 unregister_framebuffer(&all->info);
359                 fb_dealloc_cmap(&all->info.cmap);
360                 kfree(all);
361         }
362 }
363
364 int __init
365 p9100_setup(char *arg)
366 {
367         /* No cmdline options yet... */
368         return 0;
369 }
370
371 module_init(p9100_init);
372
373 #ifdef MODULE
374 module_exit(p9100_exit);
375 #endif
376
377 MODULE_DESCRIPTION("framebuffer driver for P9100 chipsets");
378 MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
379 MODULE_LICENSE("GPL");