blob: 9bb6257d6918258f8e924cd0b5ba49bb3deadcad [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* bw2.c: BWTWO frame buffer driver
2 *
David S. Miller50312ce2006-06-29 14:35:52 -07003 * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 * Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz)
5 * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
6 * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
7 *
8 * Driver layout based loosely on tgafb.c, see that file for credits.
9 */
10
11#include <linux/module.h>
12#include <linux/kernel.h>
13#include <linux/errno.h>
14#include <linux/string.h>
15#include <linux/slab.h>
16#include <linux/delay.h>
17#include <linux/init.h>
18#include <linux/fb.h>
19#include <linux/mm.h>
20
21#include <asm/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <asm/oplib.h>
David S. Miller50312ce2006-06-29 14:35:52 -070023#include <asm/prom.h>
24#include <asm/of_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <asm/fbio.h>
26
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "sbuslib.h"
28
29/*
30 * Local functions.
31 */
32
33static int bw2_blank(int, struct fb_info *);
34
Christoph Hellwig216d5262006-01-14 13:21:25 -080035static int bw2_mmap(struct fb_info *, struct vm_area_struct *);
Christoph Hellwig67a66802006-01-14 13:21:25 -080036static int bw2_ioctl(struct fb_info *, unsigned int, unsigned long);
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
38/*
39 * Frame buffer operations
40 */
41
42static struct fb_ops bw2_ops = {
43 .owner = THIS_MODULE,
44 .fb_blank = bw2_blank,
45 .fb_fillrect = cfb_fillrect,
46 .fb_copyarea = cfb_copyarea,
47 .fb_imageblit = cfb_imageblit,
48 .fb_mmap = bw2_mmap,
49 .fb_ioctl = bw2_ioctl,
Christoph Hellwig9ffb83b2005-11-12 12:11:12 -080050#ifdef CONFIG_COMPAT
51 .fb_compat_ioctl = sbusfb_compat_ioctl,
52#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070053};
54
55/* OBio addresses for the bwtwo registers */
56#define BWTWO_REGISTER_OFFSET 0x400000
57
58struct bt_regs {
David S. Miller50312ce2006-06-29 14:35:52 -070059 u32 addr;
60 u32 color_map;
61 u32 control;
62 u32 cursor;
Linus Torvalds1da177e2005-04-16 15:20:36 -070063};
64
65struct bw2_regs {
66 struct bt_regs cmap;
David S. Miller50312ce2006-06-29 14:35:52 -070067 u8 control;
68 u8 status;
69 u8 cursor_start;
70 u8 cursor_end;
71 u8 h_blank_start;
72 u8 h_blank_end;
73 u8 h_sync_start;
74 u8 h_sync_end;
75 u8 comp_sync_end;
76 u8 v_blank_start_high;
77 u8 v_blank_start_low;
78 u8 v_blank_end;
79 u8 v_sync_start;
80 u8 v_sync_end;
81 u8 xfer_holdoff_start;
82 u8 xfer_holdoff_end;
Linus Torvalds1da177e2005-04-16 15:20:36 -070083};
84
85/* Status Register Constants */
86#define BWTWO_SR_RES_MASK 0x70
87#define BWTWO_SR_1600_1280 0x50
88#define BWTWO_SR_1152_900_76_A 0x40
89#define BWTWO_SR_1152_900_76_B 0x60
90#define BWTWO_SR_ID_MASK 0x0f
91#define BWTWO_SR_ID_MONO 0x02
92#define BWTWO_SR_ID_MONO_ECL 0x03
93#define BWTWO_SR_ID_MSYNC 0x04
94#define BWTWO_SR_ID_NOCONN 0x0a
95
96/* Control Register Constants */
97#define BWTWO_CTL_ENABLE_INTS 0x80
98#define BWTWO_CTL_ENABLE_VIDEO 0x40
99#define BWTWO_CTL_ENABLE_TIMING 0x20
100#define BWTWO_CTL_ENABLE_CURCMP 0x10
101#define BWTWO_CTL_XTAL_MASK 0x0C
102#define BWTWO_CTL_DIVISOR_MASK 0x03
103
104/* Status Register Constants */
105#define BWTWO_STAT_PENDING_INT 0x80
106#define BWTWO_STAT_MSENSE_MASK 0x70
107#define BWTWO_STAT_ID_MASK 0x0f
108
109struct bw2_par {
110 spinlock_t lock;
111 struct bw2_regs __iomem *regs;
112
113 u32 flags;
114#define BW2_FLAG_BLANKED 0x00000001
115
116 unsigned long physbase;
David S. Miller50312ce2006-06-29 14:35:52 -0700117 unsigned long which_io;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 unsigned long fbsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119};
120
121/**
122 * bw2_blank - Optional function. Blanks the display.
123 * @blank_mode: the blank mode we want.
124 * @info: frame buffer structure that represents a single frame buffer
125 */
126static int
127bw2_blank(int blank, struct fb_info *info)
128{
129 struct bw2_par *par = (struct bw2_par *) info->par;
130 struct bw2_regs __iomem *regs = par->regs;
131 unsigned long flags;
132 u8 val;
133
134 spin_lock_irqsave(&par->lock, flags);
135
136 switch (blank) {
137 case FB_BLANK_UNBLANK: /* Unblanking */
138 val = sbus_readb(&regs->control);
139 val |= BWTWO_CTL_ENABLE_VIDEO;
140 sbus_writeb(val, &regs->control);
141 par->flags &= ~BW2_FLAG_BLANKED;
142 break;
143
144 case FB_BLANK_NORMAL: /* Normal blanking */
145 case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
146 case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
147 case FB_BLANK_POWERDOWN: /* Poweroff */
148 val = sbus_readb(&regs->control);
149 val &= ~BWTWO_CTL_ENABLE_VIDEO;
150 sbus_writeb(val, &regs->control);
151 par->flags |= BW2_FLAG_BLANKED;
152 break;
153 }
154
155 spin_unlock_irqrestore(&par->lock, flags);
156
157 return 0;
158}
159
160static struct sbus_mmap_map bw2_mmap_map[] = {
161 {
162 .size = SBUS_MMAP_FBSIZE(1)
163 },
164 { .size = 0 }
165};
166
Christoph Hellwig216d5262006-01-14 13:21:25 -0800167static int bw2_mmap(struct fb_info *info, struct vm_area_struct *vma)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168{
169 struct bw2_par *par = (struct bw2_par *)info->par;
170
171 return sbusfb_mmap_helper(bw2_mmap_map,
172 par->physbase, par->fbsize,
David S. Miller50312ce2006-06-29 14:35:52 -0700173 par->which_io,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 vma);
175}
176
Christoph Hellwig67a66802006-01-14 13:21:25 -0800177static int bw2_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178{
179 struct bw2_par *par = (struct bw2_par *) info->par;
180
181 return sbusfb_ioctl_helper(cmd, arg, info,
182 FBTYPE_SUN2BW, 1, par->fbsize);
183}
184
185/*
186 * Initialisation
187 */
188
189static void
190bw2_init_fix(struct fb_info *info, int linebytes)
191{
192 strlcpy(info->fix.id, "bwtwo", sizeof(info->fix.id));
193
194 info->fix.type = FB_TYPE_PACKED_PIXELS;
195 info->fix.visual = FB_VISUAL_MONO01;
196
197 info->fix.line_length = linebytes;
198
199 info->fix.accel = FB_ACCEL_SUN_BWTWO;
200}
201
202static u8 bw2regs_1600[] __initdata = {
203 0x14, 0x8b, 0x15, 0x28, 0x16, 0x03, 0x17, 0x13,
204 0x18, 0x7b, 0x19, 0x05, 0x1a, 0x34, 0x1b, 0x2e,
205 0x1c, 0x00, 0x1d, 0x0a, 0x1e, 0xff, 0x1f, 0x01,
206 0x10, 0x21, 0
207};
208
209static u8 bw2regs_ecl[] __initdata = {
210 0x14, 0x65, 0x15, 0x1e, 0x16, 0x04, 0x17, 0x0c,
211 0x18, 0x5e, 0x19, 0x03, 0x1a, 0xa7, 0x1b, 0x23,
212 0x1c, 0x00, 0x1d, 0x08, 0x1e, 0xff, 0x1f, 0x01,
213 0x10, 0x20, 0
214};
215
216static u8 bw2regs_analog[] __initdata = {
217 0x14, 0xbb, 0x15, 0x2b, 0x16, 0x03, 0x17, 0x13,
218 0x18, 0xb0, 0x19, 0x03, 0x1a, 0xa6, 0x1b, 0x22,
219 0x1c, 0x01, 0x1d, 0x05, 0x1e, 0xff, 0x1f, 0x01,
220 0x10, 0x20, 0
221};
222
223static u8 bw2regs_76hz[] __initdata = {
224 0x14, 0xb7, 0x15, 0x27, 0x16, 0x03, 0x17, 0x0f,
225 0x18, 0xae, 0x19, 0x03, 0x1a, 0xae, 0x1b, 0x2a,
226 0x1c, 0x01, 0x1d, 0x09, 0x1e, 0xff, 0x1f, 0x01,
227 0x10, 0x24, 0
228};
229
230static u8 bw2regs_66hz[] __initdata = {
231 0x14, 0xbb, 0x15, 0x2b, 0x16, 0x04, 0x17, 0x14,
232 0x18, 0xae, 0x19, 0x03, 0x1a, 0xa8, 0x1b, 0x24,
233 0x1c, 0x01, 0x1d, 0x05, 0x1e, 0xff, 0x1f, 0x01,
234 0x10, 0x20, 0
235};
236
237static void bw2_do_default_mode(struct bw2_par *par, struct fb_info *info,
238 int *linebytes)
239{
240 u8 status, mon;
241 u8 *p;
242
243 status = sbus_readb(&par->regs->status);
244 mon = status & BWTWO_SR_RES_MASK;
245 switch (status & BWTWO_SR_ID_MASK) {
246 case BWTWO_SR_ID_MONO_ECL:
247 if (mon == BWTWO_SR_1600_1280) {
248 p = bw2regs_1600;
249 info->var.xres = info->var.xres_virtual = 1600;
250 info->var.yres = info->var.yres_virtual = 1280;
251 *linebytes = 1600 / 8;
252 } else
253 p = bw2regs_ecl;
254 break;
255
256 case BWTWO_SR_ID_MONO:
257 p = bw2regs_analog;
258 break;
259
260 case BWTWO_SR_ID_MSYNC:
261 if (mon == BWTWO_SR_1152_900_76_A ||
262 mon == BWTWO_SR_1152_900_76_B)
263 p = bw2regs_76hz;
264 else
265 p = bw2regs_66hz;
266 break;
267
268 case BWTWO_SR_ID_NOCONN:
269 return;
270
271 default:
272 prom_printf("bw2: can't handle SR %02x\n",
273 status);
274 prom_halt();
275 }
276 for ( ; *p; p += 2) {
277 u8 __iomem *regp = &((u8 __iomem *)par->regs)[p[0]];
278 sbus_writeb(p[1], regp);
279 }
280}
281
282struct all_info {
283 struct fb_info info;
284 struct bw2_par par;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286
David S. Miller50312ce2006-06-29 14:35:52 -0700287static int __devinit bw2_init_one(struct of_device *op)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288{
David S. Miller50312ce2006-06-29 14:35:52 -0700289 struct device_node *dp = op->node;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 struct all_info *all;
David S. Miller50312ce2006-06-29 14:35:52 -0700291 int linebytes, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
David S. Miller50312ce2006-06-29 14:35:52 -0700293 all = kzalloc(sizeof(*all), GFP_KERNEL);
294 if (!all)
295 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
297 spin_lock_init(&all->par.lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298
David S. Miller50312ce2006-06-29 14:35:52 -0700299 all->par.physbase = op->resource[0].start;
300 all->par.which_io = op->resource[0].flags & IORESOURCE_BITS;
301
302 sbusfb_fill_var(&all->info.var, dp->node, 1);
303 linebytes = of_getintprop_default(dp, "linebytes",
304 all->info.var.xres);
305
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 all->info.var.red.length = all->info.var.green.length =
307 all->info.var.blue.length = all->info.var.bits_per_pixel;
308 all->info.var.red.offset = all->info.var.green.offset =
309 all->info.var.blue.offset = 0;
310
David S. Miller50312ce2006-06-29 14:35:52 -0700311 all->par.regs = of_ioremap(&op->resource[0], BWTWO_REGISTER_OFFSET,
312 sizeof(struct bw2_regs), "bw2 regs");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313
David S. Miller50312ce2006-06-29 14:35:52 -0700314 if (!of_find_property(dp, "width", NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 bw2_do_default_mode(&all->par, &all->info, &linebytes);
316
317 all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);
318
319 all->info.flags = FBINFO_DEFAULT;
320 all->info.fbops = &bw2_ops;
David S. Miller50312ce2006-06-29 14:35:52 -0700321
322 all->info.screen_base =
David S. Millere3a411a2006-12-28 21:01:32 -0800323 of_ioremap(&op->resource[0], 0, all->par.fbsize, "bw2 ram");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 all->info.par = &all->par;
325
326 bw2_blank(0, &all->info);
327
328 bw2_init_fix(&all->info, linebytes);
329
David S. Miller50312ce2006-06-29 14:35:52 -0700330 err= register_framebuffer(&all->info);
331 if (err < 0) {
David S. Millere3a411a2006-12-28 21:01:32 -0800332 of_iounmap(&op->resource[0],
333 all->par.regs, sizeof(struct bw2_regs));
334 of_iounmap(&op->resource[0],
335 all->info.screen_base, all->par.fbsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 kfree(all);
David S. Miller50312ce2006-06-29 14:35:52 -0700337 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 }
339
David S. Miller50312ce2006-06-29 14:35:52 -0700340 dev_set_drvdata(&op->dev, all);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
David S. Miller50312ce2006-06-29 14:35:52 -0700342 printk("%s: bwtwo at %lx:%lx\n",
343 dp->full_name,
344 all->par.which_io, all->par.physbase);
345
346 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347}
348
David S. Miller50312ce2006-06-29 14:35:52 -0700349static int __devinit bw2_probe(struct of_device *dev, const struct of_device_id *match)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350{
David S. Miller50312ce2006-06-29 14:35:52 -0700351 struct of_device *op = to_of_device(&dev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352
David S. Miller50312ce2006-06-29 14:35:52 -0700353 return bw2_init_one(op);
354}
355
David S. Millere3a411a2006-12-28 21:01:32 -0800356static int __devexit bw2_remove(struct of_device *op)
David S. Miller50312ce2006-06-29 14:35:52 -0700357{
David S. Millere3a411a2006-12-28 21:01:32 -0800358 struct all_info *all = dev_get_drvdata(&op->dev);
David S. Miller50312ce2006-06-29 14:35:52 -0700359
360 unregister_framebuffer(&all->info);
361
David S. Millere3a411a2006-12-28 21:01:32 -0800362 of_iounmap(&op->resource[0], all->par.regs, sizeof(struct bw2_regs));
363 of_iounmap(&op->resource[0], all->info.screen_base, all->par.fbsize);
David S. Miller50312ce2006-06-29 14:35:52 -0700364
365 kfree(all);
366
David S. Millere3a411a2006-12-28 21:01:32 -0800367 dev_set_drvdata(&op->dev, NULL);
David S. Miller50312ce2006-06-29 14:35:52 -0700368
369 return 0;
370}
371
372static struct of_device_id bw2_match[] = {
373 {
374 .name = "bwtwo",
375 },
376 {},
377};
378MODULE_DEVICE_TABLE(of, bw2_match);
379
380static struct of_platform_driver bw2_driver = {
381 .name = "bw2",
382 .match_table = bw2_match,
383 .probe = bw2_probe,
384 .remove = __devexit_p(bw2_remove),
385};
386
387static int __init bw2_init(void)
388{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 if (fb_get_options("bw2fb", NULL))
390 return -ENODEV;
391
David S. Miller50312ce2006-06-29 14:35:52 -0700392 return of_register_driver(&bw2_driver, &of_bus_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393}
394
David S. Miller50312ce2006-06-29 14:35:52 -0700395static void __exit bw2_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396{
David S. Miller50312ce2006-06-29 14:35:52 -0700397 return of_unregister_driver(&bw2_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398}
399
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400
401module_init(bw2_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402module_exit(bw2_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403
404MODULE_DESCRIPTION("framebuffer driver for BWTWO chipsets");
David S. Miller50312ce2006-06-29 14:35:52 -0700405MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
406MODULE_VERSION("2.0");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407MODULE_LICENSE("GPL");