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1da177e4 LT |
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"); |