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), ®s->ramdac_cmap_wridx);
171 sbus_writel((red << 16), ®s->ramdac_palette_data);
172 sbus_writel((green << 16), ®s->ramdac_palette_data);
173 sbus_writel((blue << 16), ®s->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(®s->vid_screenpaint_timectl1);
198 val |= SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
199 sbus_writel(val, ®s->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(®s->vid_screenpaint_timectl1);
208 val &= ~SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
209 sbus_writel(val, ®s->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");
380
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