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