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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * HP300 Topcat framebuffer support (derived from macfb of all things)
3 * Phil Blundell <philb@gnu.org> 1998
4 * DIO-II, colour map and Catseye support by
5 * Kars de Jong <jongk@linux-m68k.org>, May 2004.
6 */
7
8#include <linux/module.h>
9#include <linux/kernel.h>
10#include <linux/sched.h>
11#include <linux/errno.h>
12#include <linux/string.h>
13#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/slab.h>
15#include <linux/delay.h>
16#include <linux/init.h>
17#include <linux/fb.h>
18#include <linux/dio.h>
19
20#include <asm/io.h>
21#include <asm/uaccess.h>
22
23static struct fb_info fb_info = {
24 .fix = {
25 .id = "HP300 ",
26 .type = FB_TYPE_PACKED_PIXELS,
27 .visual = FB_VISUAL_PSEUDOCOLOR,
28 .accel = FB_ACCEL_NONE,
29 }
30};
31
32static unsigned long fb_regs;
33static unsigned char fb_bitmask;
34
35#define TC_NBLANK 0x4080
36#define TC_WEN 0x4088
37#define TC_REN 0x408c
38#define TC_FBEN 0x4090
39#define TC_PRR 0x40ea
40
41/* These defines match the X window system */
42#define RR_CLEAR 0x0
43#define RR_COPY 0x3
44#define RR_NOOP 0x5
45#define RR_XOR 0x6
46#define RR_INVERT 0xa
47#define RR_COPYINVERTED 0xc
48#define RR_SET 0xf
49
50/* blitter regs */
51#define BUSY 0x4044
52#define WMRR 0x40ef
53#define SOURCE_X 0x40f2
54#define SOURCE_Y 0x40f6
55#define DEST_X 0x40fa
56#define DEST_Y 0x40fe
57#define WHEIGHT 0x4106
58#define WWIDTH 0x4102
59#define WMOVE 0x409c
60
61static struct fb_var_screeninfo hpfb_defined = {
62 .red = {
63 .length = 8,
64 },
65 .green = {
66 .length = 8,
67 },
68 .blue = {
69 .length = 8,
70 },
71 .activate = FB_ACTIVATE_NOW,
72 .height = -1,
73 .width = -1,
74 .vmode = FB_VMODE_NONINTERLACED,
75};
76
77static int hpfb_setcolreg(unsigned regno, unsigned red, unsigned green,
78 unsigned blue, unsigned transp,
79 struct fb_info *info)
80{
81 /* use MSBs */
82 unsigned char _red =red>>8;
83 unsigned char _green=green>>8;
84 unsigned char _blue =blue>>8;
85 unsigned char _regno=regno;
86
87 /*
88 * Set a single color register. The values supplied are
89 * already rounded down to the hardware's capabilities
90 * (according to the entries in the `var' structure). Return
91 * != 0 for invalid regno.
92 */
93
94 if (regno >= info->cmap.len)
95 return 1;
96
97 while (in_be16(fb_regs + 0x6002) & 0x4) udelay(1);
98
99 out_be16(fb_regs + 0x60ba, 0xff);
100
101 out_be16(fb_regs + 0x60b2, _red);
102 out_be16(fb_regs + 0x60b4, _green);
103 out_be16(fb_regs + 0x60b6, _blue);
104 out_be16(fb_regs + 0x60b8, ~_regno);
105 out_be16(fb_regs + 0x60f0, 0xff);
106
107 udelay(100);
108
109 while (in_be16(fb_regs + 0x6002) & 0x4) udelay(1);
110 out_be16(fb_regs + 0x60b2, 0);
111 out_be16(fb_regs + 0x60b4, 0);
112 out_be16(fb_regs + 0x60b6, 0);
113 out_be16(fb_regs + 0x60b8, 0);
114
115 return 0;
116}
117
118/* 0 unblank, 1 blank, 2 no vsync, 3 no hsync, 4 off */
119
120static int hpfb_blank(int blank, struct fb_info *info)
121{
122 out_8(fb_regs + TC_NBLANK, (blank ? 0x00 : fb_bitmask));
123
124 return 0;
125}
126
127static void topcat_blit(int x0, int y0, int x1, int y1, int w, int h, int rr)
128{
129 if (rr >= 0) {
130 while (in_8(fb_regs + BUSY) & fb_bitmask)
131 ;
132 }
133 out_8(fb_regs + TC_FBEN, fb_bitmask);
134 if (rr >= 0) {
135 out_8(fb_regs + TC_WEN, fb_bitmask);
136 out_8(fb_regs + WMRR, rr);
137 }
138 out_be16(fb_regs + SOURCE_X, x0);
139 out_be16(fb_regs + SOURCE_Y, y0);
140 out_be16(fb_regs + DEST_X, x1);
141 out_be16(fb_regs + DEST_Y, y1);
142 out_be16(fb_regs + WWIDTH, w);
143 out_be16(fb_regs + WHEIGHT, h);
144 out_8(fb_regs + WMOVE, fb_bitmask);
145}
146
147static void hpfb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
148{
149 topcat_blit(area->sx, area->sy, area->dx, area->dy, area->width, area->height, RR_COPY);
150}
151
152static void hpfb_fillrect(struct fb_info *p, const struct fb_fillrect *region)
153{
154 u8 clr;
155
156 clr = region->color & 0xff;
157
158 while (in_8(fb_regs + BUSY) & fb_bitmask)
159 ;
160
161 /* Foreground */
162 out_8(fb_regs + TC_WEN, fb_bitmask & clr);
163 out_8(fb_regs + WMRR, (region->rop == ROP_COPY ? RR_SET : RR_INVERT));
164
165 /* Background */
166 out_8(fb_regs + TC_WEN, fb_bitmask & ~clr);
167 out_8(fb_regs + WMRR, (region->rop == ROP_COPY ? RR_CLEAR : RR_NOOP));
168
169 topcat_blit(region->dx, region->dy, region->dx, region->dy, region->width, region->height, -1);
170}
171
172static int hpfb_sync(struct fb_info *info)
173{
174 /*
175 * Since we also access the framebuffer directly, we have to wait
176 * until the block mover is finished
177 */
178 while (in_8(fb_regs + BUSY) & fb_bitmask)
179 ;
180
181 out_8(fb_regs + TC_WEN, fb_bitmask);
182 out_8(fb_regs + TC_PRR, RR_COPY);
183 out_8(fb_regs + TC_FBEN, fb_bitmask);
184
185 return 0;
186}
187
188static struct fb_ops hpfb_ops = {
189 .owner = THIS_MODULE,
190 .fb_setcolreg = hpfb_setcolreg,
191 .fb_blank = hpfb_blank,
192 .fb_fillrect = hpfb_fillrect,
193 .fb_copyarea = hpfb_copyarea,
194 .fb_imageblit = cfb_imageblit,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 .fb_sync = hpfb_sync,
196};
197
198/* Common to all HP framebuffers */
199#define HPFB_FBWMSB 0x05 /* Frame buffer width */
200#define HPFB_FBWLSB 0x07
201#define HPFB_FBHMSB 0x09 /* Frame buffer height */
202#define HPFB_FBHLSB 0x0b
203#define HPFB_DWMSB 0x0d /* Display width */
204#define HPFB_DWLSB 0x0f
205#define HPFB_DHMSB 0x11 /* Display height */
206#define HPFB_DHLSB 0x13
207#define HPFB_NUMPLANES 0x5b /* Number of colour planes */
208#define HPFB_FBOMSB 0x5d /* Frame buffer offset */
209#define HPFB_FBOLSB 0x5f
210
211static int __init hpfb_init_one(unsigned long phys_base, unsigned long virt_base)
212{
213 unsigned long fboff, fb_width, fb_height, fb_start;
214
215 fb_regs = virt_base;
216 fboff = (in_8(fb_regs + HPFB_FBOMSB) << 8) | in_8(fb_regs + HPFB_FBOLSB);
217
218 fb_info.fix.smem_start = (in_8(fb_regs + fboff) << 16);
219
220 if (phys_base >= DIOII_BASE) {
221 fb_info.fix.smem_start += phys_base;
222 }
223
224 if (DIO_SECID(fb_regs) != DIO_ID2_TOPCAT) {
225 /* This is the magic incantation the HP X server uses to make Catseye boards work. */
226 while (in_be16(fb_regs+0x4800) & 1)
227 ;
228 out_be16(fb_regs+0x4800, 0); /* Catseye status */
229 out_be16(fb_regs+0x4510, 0); /* VB */
230 out_be16(fb_regs+0x4512, 0); /* TCNTRL */
231 out_be16(fb_regs+0x4514, 0); /* ACNTRL */
232 out_be16(fb_regs+0x4516, 0); /* PNCNTRL */
233 out_be16(fb_regs+0x4206, 0x90); /* RUG Command/Status */
234 out_be16(fb_regs+0x60a2, 0); /* Overlay Mask */
235 out_be16(fb_regs+0x60bc, 0); /* Ram Select */
236 }
237
238 /*
239 * Fill in the available video resolution
240 */
241 fb_width = (in_8(fb_regs + HPFB_FBWMSB) << 8) | in_8(fb_regs + HPFB_FBWLSB);
242 fb_info.fix.line_length = fb_width;
243 fb_height = (in_8(fb_regs + HPFB_FBHMSB) << 8) | in_8(fb_regs + HPFB_FBHLSB);
244 fb_info.fix.smem_len = fb_width * fb_height;
245 fb_start = (unsigned long)ioremap_writethrough(fb_info.fix.smem_start,
246 fb_info.fix.smem_len);
247 hpfb_defined.xres = (in_8(fb_regs + HPFB_DWMSB) << 8) | in_8(fb_regs + HPFB_DWLSB);
248 hpfb_defined.yres = (in_8(fb_regs + HPFB_DHMSB) << 8) | in_8(fb_regs + HPFB_DHLSB);
249 hpfb_defined.xres_virtual = hpfb_defined.xres;
250 hpfb_defined.yres_virtual = hpfb_defined.yres;
251 hpfb_defined.bits_per_pixel = in_8(fb_regs + HPFB_NUMPLANES);
252
253 printk(KERN_INFO "hpfb: framebuffer at 0x%lx, mapped to 0x%lx, size %dk\n",
254 fb_info.fix.smem_start, fb_start, fb_info.fix.smem_len/1024);
255 printk(KERN_INFO "hpfb: mode is %dx%dx%d, linelength=%d\n",
256 hpfb_defined.xres, hpfb_defined.yres, hpfb_defined.bits_per_pixel, fb_info.fix.line_length);
257
258 /*
259 * Give the hardware a bit of a prod and work out how many bits per
260 * pixel are supported.
261 */
262 out_8(fb_regs + TC_WEN, 0xff);
263 out_8(fb_regs + TC_PRR, RR_COPY);
264 out_8(fb_regs + TC_FBEN, 0xff);
265 out_8(fb_start, 0xff);
266 fb_bitmask = in_8(fb_start);
267 out_8(fb_start, 0);
268
269 /*
270 * Enable reading/writing of all the planes.
271 */
272 out_8(fb_regs + TC_WEN, fb_bitmask);
273 out_8(fb_regs + TC_PRR, RR_COPY);
274 out_8(fb_regs + TC_REN, fb_bitmask);
275 out_8(fb_regs + TC_FBEN, fb_bitmask);
276
277 /*
278 * Clear the screen.
279 */
280 topcat_blit(0, 0, 0, 0, fb_width, fb_height, RR_CLEAR);
281
282 /*
283 * Let there be consoles..
284 */
285 if (DIO_SECID(fb_regs) == DIO_ID2_TOPCAT)
286 strcat(fb_info.fix.id, "Topcat");
287 else
288 strcat(fb_info.fix.id, "Catseye");
289 fb_info.fbops = &hpfb_ops;
290 fb_info.flags = FBINFO_DEFAULT;
291 fb_info.var = hpfb_defined;
292 fb_info.screen_base = (char *)fb_start;
293
294 fb_alloc_cmap(&fb_info.cmap, 1 << hpfb_defined.bits_per_pixel, 0);
295
296 if (register_framebuffer(&fb_info) < 0) {
297 fb_dealloc_cmap(&fb_info.cmap);
298 return 1;
299 }
300
301 printk(KERN_INFO "fb%d: %s frame buffer device\n",
302 fb_info.node, fb_info.fix.id);
303
304 return 0;
305}
306
307/*
308 * Check that the secondary ID indicates that we have some hope of working with this
309 * framebuffer. The catseye boards are pretty much like topcats and we can muddle through.
310 */
311
312#define topcat_sid_ok(x) (((x) == DIO_ID2_LRCATSEYE) || ((x) == DIO_ID2_HRCCATSEYE) \
313 || ((x) == DIO_ID2_HRMCATSEYE) || ((x) == DIO_ID2_TOPCAT))
314
315/*
316 * Initialise the framebuffer
317 */
318static int __devinit hpfb_dio_probe(struct dio_dev * d, const struct dio_device_id * ent)
319{
320 unsigned long paddr, vaddr;
321
322 paddr = d->resource.start;
323 if (!request_mem_region(d->resource.start, d->resource.end - d->resource.start, d->name))
324 return -EBUSY;
325
326 if (d->scode >= DIOII_SCBASE) {
327 vaddr = (unsigned long)ioremap(paddr, d->resource.end - d->resource.start);
328 } else {
329 vaddr = paddr + DIO_VIRADDRBASE;
330 }
331 printk(KERN_INFO "Topcat found at DIO select code %d "
332 "(secondary id %02x)\n", d->scode, (d->id >> 8) & 0xff);
333 if (hpfb_init_one(paddr, vaddr)) {
334 if (d->scode >= DIOII_SCBASE)
335 iounmap((void *)vaddr);
336 return -ENOMEM;
337 }
338 return 0;
339}
340
341static void __devexit hpfb_remove_one(struct dio_dev *d)
342{
343 unregister_framebuffer(&fb_info);
344 if (d->scode >= DIOII_SCBASE)
345 iounmap((void *)fb_regs);
346 release_mem_region(d->resource.start, d->resource.end - d->resource.start);
347}
348
349static struct dio_device_id hpfb_dio_tbl[] = {
350 { DIO_ENCODE_ID(DIO_ID_FBUFFER, DIO_ID2_LRCATSEYE) },
351 { DIO_ENCODE_ID(DIO_ID_FBUFFER, DIO_ID2_HRCCATSEYE) },
352 { DIO_ENCODE_ID(DIO_ID_FBUFFER, DIO_ID2_HRMCATSEYE) },
353 { DIO_ENCODE_ID(DIO_ID_FBUFFER, DIO_ID2_TOPCAT) },
354 { 0 }
355};
356
357static struct dio_driver hpfb_driver = {
358 .name = "hpfb",
359 .id_table = hpfb_dio_tbl,
360 .probe = hpfb_dio_probe,
361 .remove = __devexit_p(hpfb_remove_one),
362};
363
364int __init hpfb_init(void)
365{
366 unsigned int sid;
367 mm_segment_t fs;
368 unsigned char i;
369 int err;
370
371 /* Topcats can be on the internal IO bus or real DIO devices.
372 * The internal variant sits at 0x560000; it has primary
373 * and secondary ID registers just like the DIO version.
374 * So we merge the two detection routines.
375 *
376 * Perhaps this #define should be in a global header file:
377 * I believe it's common to all internal fbs, not just topcat.
378 */
379#define INTFBVADDR 0xf0560000
380#define INTFBPADDR 0x560000
381
382 if (!MACH_IS_HP300)
383 return -ENXIO;
384
385 if (fb_get_options("hpfb", NULL))
386 return -ENODEV;
387
Bjorn Helgaase51c01b2006-03-25 03:07:17 -0800388 err = dio_register_driver(&hpfb_driver);
389 if (err)
390 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391
392 fs = get_fs();
393 set_fs(KERNEL_DS);
394 err = get_user(i, (unsigned char *)INTFBVADDR + DIO_IDOFF);
395 set_fs(fs);
396
397 if (!err && (i == DIO_ID_FBUFFER) && topcat_sid_ok(sid = DIO_SECID(INTFBVADDR))) {
398 if (!request_mem_region(INTFBPADDR, DIO_DEVSIZE, "Internal Topcat"))
399 return -EBUSY;
400 printk(KERN_INFO "Internal Topcat found (secondary id %02x)\n", sid);
401 if (hpfb_init_one(INTFBPADDR, INTFBVADDR)) {
402 return -ENOMEM;
403 }
404 }
405 return 0;
406}
407
408void __exit hpfb_cleanup_module(void)
409{
410 dio_unregister_driver(&hpfb_driver);
411}
412
413module_init(hpfb_init);
414module_exit(hpfb_cleanup_module);
415
416MODULE_LICENSE("GPL");