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9#include <linux/module.h>
10#include <linux/kernel.h>
11#include <linux/errno.h>
12#include <linux/string.h>
13#include <linux/mm.h>
14#include <linux/delay.h>
15#include <linux/fb.h>
16#include <linux/init.h>
17#include <linux/pci.h>
18
19#include "geodefb.h"
20#include "display_gx1.h"
21#include "video_cs5530.h"
22
23static char mode_option[32] = "640x480-16@60";
24static int crt_option = 1;
25static char panel_option[32] = "";
26
27
28static const struct fb_videomode gx1_modedb[] = {
29
30 { NULL, 60, 640, 480, 39682, 48, 16, 33, 10, 96, 2,
31 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
32
33 { NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
34 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
35
36 { NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
37 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
38
39 { NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
40 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
41 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
42
43 { NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
44 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
45 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
46
47 { NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
48 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
49 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
50
51 { NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
52 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
53
54 { NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
55 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
56 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
57
58 { NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
59 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
60 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
61
62 { NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
63 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
64 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
65
66 { NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
67 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
68 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
69
70 { NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
71 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
72 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
73
74 { NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
75 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
76 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
77
78 { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
79 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
80 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
81};
82
83static int gx1_line_delta(int xres, int bpp)
84{
85 int line_delta = xres * (bpp >> 3);
86
87 if (line_delta > 2048)
88 line_delta = 4096;
89 else if (line_delta > 1024)
90 line_delta = 2048;
91 else
92 line_delta = 1024;
93 return line_delta;
94}
95
96static int gx1fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
97{
98 struct geodefb_par *par = info->par;
99
100
101 if (var->xres > 1280 || var->yres > 1024)
102 return -EINVAL;
103
104 if (par->panel_x && (var->xres > par->panel_x || var->yres > par->panel_y))
105 return -EINVAL;
106
107
108 if (var->bits_per_pixel == 16) {
109 var->red.offset = 11; var->red.length = 5;
110 var->green.offset = 5; var->green.length = 6;
111 var->blue.offset = 0; var->blue.length = 5;
112 var->transp.offset = 0; var->transp.length = 0;
113 } else if (var->bits_per_pixel == 8) {
114 var->red.offset = 0; var->red.length = 8;
115 var->green.offset = 0; var->green.length = 8;
116 var->blue.offset = 0; var->blue.length = 8;
117 var->transp.offset = 0; var->transp.length = 0;
118 } else
119 return -EINVAL;
120
121
122 if (gx1_line_delta(var->xres, var->bits_per_pixel) * var->yres > info->fix.smem_len)
123 return -EINVAL;
124
125
126
127 return 0;
128}
129
130static int gx1fb_set_par(struct fb_info *info)
131{
132 struct geodefb_par *par = info->par;
133
134 if (info->var.bits_per_pixel == 16)
135 info->fix.visual = FB_VISUAL_TRUECOLOR;
136 else
137 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
138
139 info->fix.line_length = gx1_line_delta(info->var.xres, info->var.bits_per_pixel);
140
141 par->dc_ops->set_mode(info);
142
143 return 0;
144}
145
146static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
147{
148 chan &= 0xffff;
149 chan >>= 16 - bf->length;
150 return chan << bf->offset;
151}
152
153static int gx1fb_setcolreg(unsigned regno, unsigned red, unsigned green,
154 unsigned blue, unsigned transp,
155 struct fb_info *info)
156{
157 struct geodefb_par *par = info->par;
158
159 if (info->var.grayscale) {
160
161 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
162 }
163
164
165 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
166 u32 *pal = info->pseudo_palette;
167 u32 v;
168
169 if (regno >= 16)
170 return -EINVAL;
171
172 v = chan_to_field(red, &info->var.red);
173 v |= chan_to_field(green, &info->var.green);
174 v |= chan_to_field(blue, &info->var.blue);
175
176 pal[regno] = v;
177 } else {
178 if (regno >= 256)
179 return -EINVAL;
180
181 par->dc_ops->set_palette_reg(info, regno, red, green, blue);
182 }
183
184 return 0;
185}
186
187static int gx1fb_blank(int blank_mode, struct fb_info *info)
188{
189 struct geodefb_par *par = info->par;
190
191 return par->vid_ops->blank_display(info, blank_mode);
192}
193
194static int gx1fb_map_video_memory(struct fb_info *info, struct pci_dev *dev)
195{
196 struct geodefb_par *par = info->par;
197 unsigned gx_base;
198 int fb_len;
199 int ret;
200
201 gx_base = gx1_gx_base();
202 if (!gx_base)
203 return -ENODEV;
204
205 ret = pci_enable_device(dev);
206 if (ret < 0)
207 return ret;
208
209 ret = pci_request_region(dev, 0, "gx1fb (video)");
210 if (ret < 0)
211 return ret;
212 par->vid_regs = pci_ioremap_bar(dev, 0);
213 if (!par->vid_regs)
214 return -ENOMEM;
215
216 if (!request_mem_region(gx_base + 0x8300, 0x100, "gx1fb (display controller)"))
217 return -EBUSY;
218 par->dc_regs = ioremap(gx_base + 0x8300, 0x100);
219 if (!par->dc_regs)
220 return -ENOMEM;
221
222 if ((fb_len = gx1_frame_buffer_size()) < 0)
223 return -ENOMEM;
224 info->fix.smem_start = gx_base + 0x800000;
225 info->fix.smem_len = fb_len;
226 info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
227 if (!info->screen_base)
228 return -ENOMEM;
229
230 dev_info(&dev->dev, "%d Kibyte of video memory at 0x%lx\n",
231 info->fix.smem_len / 1024, info->fix.smem_start);
232
233 return 0;
234}
235
236static int parse_panel_option(struct fb_info *info)
237{
238 struct geodefb_par *par = info->par;
239
240 if (strcmp(panel_option, "") != 0) {
241 int x, y;
242 char *s;
243 x = simple_strtol(panel_option, &s, 10);
244 if (!x)
245 return -EINVAL;
246 y = simple_strtol(s + 1, NULL, 10);
247 if (!y)
248 return -EINVAL;
249 par->panel_x = x;
250 par->panel_y = y;
251 }
252 return 0;
253}
254
255static const struct fb_ops gx1fb_ops = {
256 .owner = THIS_MODULE,
257 .fb_check_var = gx1fb_check_var,
258 .fb_set_par = gx1fb_set_par,
259 .fb_setcolreg = gx1fb_setcolreg,
260 .fb_blank = gx1fb_blank,
261
262 .fb_fillrect = cfb_fillrect,
263 .fb_copyarea = cfb_copyarea,
264 .fb_imageblit = cfb_imageblit,
265};
266
267static struct fb_info *gx1fb_init_fbinfo(struct device *dev)
268{
269 struct geodefb_par *par;
270 struct fb_info *info;
271
272
273 info = framebuffer_alloc(sizeof(struct geodefb_par) + sizeof(u32) * 16, dev);
274 if (!info)
275 return NULL;
276
277 par = info->par;
278
279 strcpy(info->fix.id, "GX1");
280
281 info->fix.type = FB_TYPE_PACKED_PIXELS;
282 info->fix.type_aux = 0;
283 info->fix.xpanstep = 0;
284 info->fix.ypanstep = 0;
285 info->fix.ywrapstep = 0;
286 info->fix.accel = FB_ACCEL_NONE;
287
288 info->var.nonstd = 0;
289 info->var.activate = FB_ACTIVATE_NOW;
290 info->var.height = -1;
291 info->var.width = -1;
292 info->var.accel_flags = 0;
293 info->var.vmode = FB_VMODE_NONINTERLACED;
294
295 info->fbops = &gx1fb_ops;
296 info->flags = FBINFO_DEFAULT;
297 info->node = -1;
298
299 info->pseudo_palette = (void *)par + sizeof(struct geodefb_par);
300
301 info->var.grayscale = 0;
302
303
304 par->enable_crt = crt_option;
305 if (parse_panel_option(info) < 0)
306 printk(KERN_WARNING "gx1fb: invalid 'panel' option -- disabling flat panel\n");
307 if (!par->panel_x)
308 par->enable_crt = 1;
309
310 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
311 framebuffer_release(info);
312 return NULL;
313 }
314 return info;
315}
316
317static int gx1fb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
318{
319 struct geodefb_par *par;
320 struct fb_info *info;
321 int ret;
322
323 info = gx1fb_init_fbinfo(&pdev->dev);
324 if (!info)
325 return -ENOMEM;
326 par = info->par;
327
328
329 par->dc_ops = &gx1_dc_ops;
330 par->vid_ops = &cs5530_vid_ops;
331
332 if ((ret = gx1fb_map_video_memory(info, pdev)) < 0) {
333 dev_err(&pdev->dev, "failed to map frame buffer or controller registers\n");
334 goto err;
335 }
336
337 ret = fb_find_mode(&info->var, info, mode_option,
338 gx1_modedb, ARRAY_SIZE(gx1_modedb), NULL, 16);
339 if (ret == 0 || ret == 4) {
340 dev_err(&pdev->dev, "could not find valid video mode\n");
341 ret = -EINVAL;
342 goto err;
343 }
344
345
346 memset_io(info->screen_base, 0, info->fix.smem_len);
347
348 gx1fb_check_var(&info->var, info);
349 gx1fb_set_par(info);
350
351 if (register_framebuffer(info) < 0) {
352 ret = -EINVAL;
353 goto err;
354 }
355 pci_set_drvdata(pdev, info);
356 fb_info(info, "%s frame buffer device\n", info->fix.id);
357 return 0;
358
359 err:
360 if (info->screen_base) {
361 iounmap(info->screen_base);
362 pci_release_region(pdev, 0);
363 }
364 if (par->vid_regs) {
365 iounmap(par->vid_regs);
366 pci_release_region(pdev, 1);
367 }
368 if (par->dc_regs) {
369 iounmap(par->dc_regs);
370 release_mem_region(gx1_gx_base() + 0x8300, 0x100);
371 }
372
373 fb_dealloc_cmap(&info->cmap);
374 framebuffer_release(info);
375
376 return ret;
377}
378
379static void gx1fb_remove(struct pci_dev *pdev)
380{
381 struct fb_info *info = pci_get_drvdata(pdev);
382 struct geodefb_par *par = info->par;
383
384 unregister_framebuffer(info);
385
386 iounmap((void __iomem *)info->screen_base);
387 pci_release_region(pdev, 0);
388
389 iounmap(par->vid_regs);
390 pci_release_region(pdev, 1);
391
392 iounmap(par->dc_regs);
393 release_mem_region(gx1_gx_base() + 0x8300, 0x100);
394
395 fb_dealloc_cmap(&info->cmap);
396
397 framebuffer_release(info);
398}
399
400#ifndef MODULE
401static void __init gx1fb_setup(char *options)
402{
403 char *this_opt;
404
405 if (!options || !*options)
406 return;
407
408 while ((this_opt = strsep(&options, ","))) {
409 if (!*this_opt)
410 continue;
411
412 if (!strncmp(this_opt, "mode:", 5))
413 strlcpy(mode_option, this_opt + 5, sizeof(mode_option));
414 else if (!strncmp(this_opt, "crt:", 4))
415 crt_option = !!simple_strtoul(this_opt + 4, NULL, 0);
416 else if (!strncmp(this_opt, "panel:", 6))
417 strlcpy(panel_option, this_opt + 6, sizeof(panel_option));
418 else
419 strlcpy(mode_option, this_opt, sizeof(mode_option));
420 }
421}
422#endif
423
424static struct pci_device_id gx1fb_id_table[] = {
425 { PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_VIDEO,
426 PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY << 16,
427 0xff0000, 0 },
428 { 0, }
429};
430
431MODULE_DEVICE_TABLE(pci, gx1fb_id_table);
432
433static struct pci_driver gx1fb_driver = {
434 .name = "gx1fb",
435 .id_table = gx1fb_id_table,
436 .probe = gx1fb_probe,
437 .remove = gx1fb_remove,
438};
439
440static int __init gx1fb_init(void)
441{
442#ifndef MODULE
443 char *option = NULL;
444
445 if (fb_get_options("gx1fb", &option))
446 return -ENODEV;
447 gx1fb_setup(option);
448#endif
449 return pci_register_driver(&gx1fb_driver);
450}
451
452static void gx1fb_cleanup(void)
453{
454 pci_unregister_driver(&gx1fb_driver);
455}
456
457module_init(gx1fb_init);
458module_exit(gx1fb_cleanup);
459
460module_param_string(mode, mode_option, sizeof(mode_option), 0444);
461MODULE_PARM_DESC(mode, "video mode (<x>x<y>[-<bpp>][@<refr>])");
462
463module_param_named(crt, crt_option, int, 0444);
464MODULE_PARM_DESC(crt, "enable CRT output. 0 = off, 1 = on (default)");
465
466module_param_string(panel, panel_option, sizeof(panel_option), 0444);
467MODULE_PARM_DESC(panel, "size of attached flat panel (<x>x<y>)");
468
469MODULE_DESCRIPTION("framebuffer driver for the AMD Geode GX1");
470MODULE_LICENSE("GPL");
471
