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Linux 4.16.11
[linux/fpc-iii.git] / drivers / video / fbdev / geode / gx1fb_core.c
blob9bee8744c43836a6dd8c49aa08ba345f64bf6903
1 /*
2 * drivers/video/geode/gx1fb_core.c
3 * -- Geode GX1 framebuffer driver
4 *
5 * Copyright (C) 2005 Arcom Control Systems Ltd.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 */
12
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/errno.h>
16 #include <linux/string.h>
17 #include <linux/mm.h>
18 #include <linux/delay.h>
19 #include <linux/fb.h>
20 #include <linux/init.h>
21 #include <linux/pci.h>
22
23 #include "geodefb.h"
24 #include "display_gx1.h"
25 #include "video_cs5530.h"
26
27 static char mode_option[32] = "640x480-16@60";
28 static int crt_option = 1;
29 static char panel_option[32] = "";
30
31 /* Modes relevant to the GX1 (taken from modedb.c) */
32 static const struct fb_videomode gx1_modedb[] = {
33 /* 640x480-60 VESA */
34 { NULL, 60, 640, 480, 39682, 48, 16, 33, 10, 96, 2,
35 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
36 /* 640x480-75 VESA */
37 { NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
38 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
39 /* 640x480-85 VESA */
40 { NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
41 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
42 /* 800x600-60 VESA */
43 { NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
44 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
45 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
46 /* 800x600-75 VESA */
47 { NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
48 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
49 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
50 /* 800x600-85 VESA */
51 { NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
52 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
53 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
54 /* 1024x768-60 VESA */
55 { NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
56 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
57 /* 1024x768-75 VESA */
58 { NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
59 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
60 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
61 /* 1024x768-85 VESA */
62 { NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
63 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
64 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
65 /* 1280x960-60 VESA */
66 { NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
67 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
68 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
69 /* 1280x960-85 VESA */
70 { NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
71 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
72 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
73 /* 1280x1024-60 VESA */
74 { NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
75 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
76 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
77 /* 1280x1024-75 VESA */
78 { NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
79 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
80 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
81 /* 1280x1024-85 VESA */
82 { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
83 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
84 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
85 };
86
87 static int gx1_line_delta(int xres, int bpp)
88 {
89 int line_delta = xres * (bpp >> 3);
90
91 if (line_delta > 2048)
92 line_delta = 4096;
93 else if (line_delta > 1024)
94 line_delta = 2048;
95 else
96 line_delta = 1024;
97 return line_delta;
98 }
99
100 static int gx1fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
101 {
102 struct geodefb_par *par = info->par;
103
104 /* Maximum resolution is 1280x1024. */
105 if (var->xres > 1280 || var->yres > 1024)
106 return -EINVAL;
107
108 if (par->panel_x && (var->xres > par->panel_x || var->yres > par->panel_y))
109 return -EINVAL;
110
111 /* Only 16 bpp and 8 bpp is supported by the hardware. */
112 if (var->bits_per_pixel == 16) {
113 var->red.offset = 11; var->red.length = 5;
114 var->green.offset = 5; var->green.length = 6;
115 var->blue.offset = 0; var->blue.length = 5;
116 var->transp.offset = 0; var->transp.length = 0;
117 } else if (var->bits_per_pixel == 8) {
118 var->red.offset = 0; var->red.length = 8;
119 var->green.offset = 0; var->green.length = 8;
120 var->blue.offset = 0; var->blue.length = 8;
121 var->transp.offset = 0; var->transp.length = 0;
122 } else
123 return -EINVAL;
124
125 /* Enough video memory? */
126 if (gx1_line_delta(var->xres, var->bits_per_pixel) * var->yres > info->fix.smem_len)
127 return -EINVAL;
128
129 /* FIXME: Check timing parameters here? */
130
131 return 0;
132 }
133
134 static int gx1fb_set_par(struct fb_info *info)
135 {
136 struct geodefb_par *par = info->par;
137
138 if (info->var.bits_per_pixel == 16)
139 info->fix.visual = FB_VISUAL_TRUECOLOR;
140 else
141 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
142
143 info->fix.line_length = gx1_line_delta(info->var.xres, info->var.bits_per_pixel);
144
145 par->dc_ops->set_mode(info);
146
147 return 0;
148 }
149
150 static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
151 {
152 chan &= 0xffff;
153 chan >>= 16 - bf->length;
154 return chan << bf->offset;
155 }
156
157 static int gx1fb_setcolreg(unsigned regno, unsigned red, unsigned green,
158 unsigned blue, unsigned transp,
159 struct fb_info *info)
160 {
161 struct geodefb_par *par = info->par;
162
163 if (info->var.grayscale) {
164 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
165 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
166 }
167
168 /* Truecolor has hardware independent palette */
169 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
170 u32 *pal = info->pseudo_palette;
171 u32 v;
172
173 if (regno >= 16)
174 return -EINVAL;
175
176 v = chan_to_field(red, &info->var.red);
177 v |= chan_to_field(green, &info->var.green);
178 v |= chan_to_field(blue, &info->var.blue);
179
180 pal[regno] = v;
181 } else {
182 if (regno >= 256)
183 return -EINVAL;
184
185 par->dc_ops->set_palette_reg(info, regno, red, green, blue);
186 }
187
188 return 0;
189 }
190
191 static int gx1fb_blank(int blank_mode, struct fb_info *info)
192 {
193 struct geodefb_par *par = info->par;
194
195 return par->vid_ops->blank_display(info, blank_mode);
196 }
197
198 static int gx1fb_map_video_memory(struct fb_info *info, struct pci_dev *dev)
199 {
200 struct geodefb_par *par = info->par;
201 unsigned gx_base;
202 int fb_len;
203 int ret;
204
205 gx_base = gx1_gx_base();
206 if (!gx_base)
207 return -ENODEV;
208
209 ret = pci_enable_device(dev);
210 if (ret < 0)
211 return ret;
212
213 ret = pci_request_region(dev, 0, "gx1fb (video)");
214 if (ret < 0)
215 return ret;
216 par->vid_regs = pci_ioremap_bar(dev, 0);
217 if (!par->vid_regs)
218 return -ENOMEM;
219
220 if (!request_mem_region(gx_base + 0x8300, 0x100, "gx1fb (display controller)"))
221 return -EBUSY;
222 par->dc_regs = ioremap(gx_base + 0x8300, 0x100);
223 if (!par->dc_regs)
224 return -ENOMEM;
225
226 if ((fb_len = gx1_frame_buffer_size()) < 0)
227 return -ENOMEM;
228 info->fix.smem_start = gx_base + 0x800000;
229 info->fix.smem_len = fb_len;
230 info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
231 if (!info->screen_base)
232 return -ENOMEM;
233
234 dev_info(&dev->dev, "%d Kibyte of video memory at 0x%lx\n",
235 info->fix.smem_len / 1024, info->fix.smem_start);
236
237 return 0;
238 }
239
240 static int parse_panel_option(struct fb_info *info)
241 {
242 struct geodefb_par *par = info->par;
243
244 if (strcmp(panel_option, "") != 0) {
245 int x, y;
246 char *s;
247 x = simple_strtol(panel_option, &s, 10);
248 if (!x)
249 return -EINVAL;
250 y = simple_strtol(s + 1, NULL, 10);
251 if (!y)
252 return -EINVAL;
253 par->panel_x = x;
254 par->panel_y = y;
255 }
256 return 0;
257 }
258
259 static struct fb_ops gx1fb_ops = {
260 .owner = THIS_MODULE,
261 .fb_check_var = gx1fb_check_var,
262 .fb_set_par = gx1fb_set_par,
263 .fb_setcolreg = gx1fb_setcolreg,
264 .fb_blank = gx1fb_blank,
265 /* No HW acceleration for now. */
266 .fb_fillrect = cfb_fillrect,
267 .fb_copyarea = cfb_copyarea,
268 .fb_imageblit = cfb_imageblit,
269 };
270
271 static struct fb_info *gx1fb_init_fbinfo(struct device *dev)
272 {
273 struct geodefb_par *par;
274 struct fb_info *info;
275
276 /* Alloc enough space for the pseudo palette. */
277 info = framebuffer_alloc(sizeof(struct geodefb_par) + sizeof(u32) * 16, dev);
278 if (!info)
279 return NULL;
280
281 par = info->par;
282
283 strcpy(info->fix.id, "GX1");
284
285 info->fix.type = FB_TYPE_PACKED_PIXELS;
286 info->fix.type_aux = 0;
287 info->fix.xpanstep = 0;
288 info->fix.ypanstep = 0;
289 info->fix.ywrapstep = 0;
290 info->fix.accel = FB_ACCEL_NONE;
291
292 info->var.nonstd = 0;
293 info->var.activate = FB_ACTIVATE_NOW;
294 info->var.height = -1;
295 info->var.width = -1;
296 info->var.accel_flags = 0;
297 info->var.vmode = FB_VMODE_NONINTERLACED;
298
299 info->fbops = &gx1fb_ops;
300 info->flags = FBINFO_DEFAULT;
301 info->node = -1;
302
303 info->pseudo_palette = (void *)par + sizeof(struct geodefb_par);
304
305 info->var.grayscale = 0;
306
307 /* CRT and panel options */
308 par->enable_crt = crt_option;
309 if (parse_panel_option(info) < 0)
310 printk(KERN_WARNING "gx1fb: invalid 'panel' option -- disabling flat panel\n");
311 if (!par->panel_x)
312 par->enable_crt = 1; /* fall back to CRT if no panel is specified */
313
314 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
315 framebuffer_release(info);
316 return NULL;
317 }
318 return info;
319 }
320
321 static int gx1fb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
322 {
323 struct geodefb_par *par;
324 struct fb_info *info;
325 int ret;
326
327 info = gx1fb_init_fbinfo(&pdev->dev);
328 if (!info)
329 return -ENOMEM;
330 par = info->par;
331
332 /* GX1 display controller and CS5530 video device */
333 par->dc_ops = &gx1_dc_ops;
334 par->vid_ops = &cs5530_vid_ops;
335
336 if ((ret = gx1fb_map_video_memory(info, pdev)) < 0) {
337 dev_err(&pdev->dev, "failed to map frame buffer or controller registers\n");
338 goto err;
339 }
340
341 ret = fb_find_mode(&info->var, info, mode_option,
342 gx1_modedb, ARRAY_SIZE(gx1_modedb), NULL, 16);
343 if (ret == 0 || ret == 4) {
344 dev_err(&pdev->dev, "could not find valid video mode\n");
345 ret = -EINVAL;
346 goto err;
347 }
348
349 /* Clear the frame buffer of garbage. */
350 memset_io(info->screen_base, 0, info->fix.smem_len);
351
352 gx1fb_check_var(&info->var, info);
353 gx1fb_set_par(info);
354
355 if (register_framebuffer(info) < 0) {
356 ret = -EINVAL;
357 goto err;
358 }
359 pci_set_drvdata(pdev, info);
360 fb_info(info, "%s frame buffer device\n", info->fix.id);
361 return 0;
362
363 err:
364 if (info->screen_base) {
365 iounmap(info->screen_base);
366 pci_release_region(pdev, 0);
367 }
368 if (par->vid_regs) {
369 iounmap(par->vid_regs);
370 pci_release_region(pdev, 1);
371 }
372 if (par->dc_regs) {
373 iounmap(par->dc_regs);
374 release_mem_region(gx1_gx_base() + 0x8300, 0x100);
375 }
376
377 fb_dealloc_cmap(&info->cmap);
378 framebuffer_release(info);
379
380 return ret;
381 }
382
383 static void gx1fb_remove(struct pci_dev *pdev)
384 {
385 struct fb_info *info = pci_get_drvdata(pdev);
386 struct geodefb_par *par = info->par;
387
388 unregister_framebuffer(info);
389
390 iounmap((void __iomem *)info->screen_base);
391 pci_release_region(pdev, 0);
392
393 iounmap(par->vid_regs);
394 pci_release_region(pdev, 1);
395
396 iounmap(par->dc_regs);
397 release_mem_region(gx1_gx_base() + 0x8300, 0x100);
398
399 fb_dealloc_cmap(&info->cmap);
400
401 framebuffer_release(info);
402 }
403
404 #ifndef MODULE
405 static void __init gx1fb_setup(char *options)
406 {
407 char *this_opt;
408
409 if (!options || !*options)
410 return;
411
412 while ((this_opt = strsep(&options, ","))) {
413 if (!*this_opt)
414 continue;
415
416 if (!strncmp(this_opt, "mode:", 5))
417 strlcpy(mode_option, this_opt + 5, sizeof(mode_option));
418 else if (!strncmp(this_opt, "crt:", 4))
419 crt_option = !!simple_strtoul(this_opt + 4, NULL, 0);
420 else if (!strncmp(this_opt, "panel:", 6))
421 strlcpy(panel_option, this_opt + 6, sizeof(panel_option));
422 else
423 strlcpy(mode_option, this_opt, sizeof(mode_option));
424 }
425 }
426 #endif
427
428 static struct pci_device_id gx1fb_id_table[] = {
429 { PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_VIDEO,
430 PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY << 16,
431 0xff0000, 0 },
432 { 0, }
433 };
434
435 MODULE_DEVICE_TABLE(pci, gx1fb_id_table);
436
437 static struct pci_driver gx1fb_driver = {
438 .name = "gx1fb",
439 .id_table = gx1fb_id_table,
440 .probe = gx1fb_probe,
441 .remove = gx1fb_remove,
442 };
443
444 static int __init gx1fb_init(void)
445 {
446 #ifndef MODULE
447 char *option = NULL;
448
449 if (fb_get_options("gx1fb", &option))
450 return -ENODEV;
451 gx1fb_setup(option);
452 #endif
453 return pci_register_driver(&gx1fb_driver);
454 }
455
456 static void gx1fb_cleanup(void)
457 {
458 pci_unregister_driver(&gx1fb_driver);
459 }
460
461 module_init(gx1fb_init);
462 module_exit(gx1fb_cleanup);
463
464 module_param_string(mode, mode_option, sizeof(mode_option), 0444);
465 MODULE_PARM_DESC(mode, "video mode (<x>x<y>[-<bpp>][@<refr>])");
466
467 module_param_named(crt, crt_option, int, 0444);
468 MODULE_PARM_DESC(crt, "enable CRT output. 0 = off, 1 = on (default)");
469
470 module_param_string(panel, panel_option, sizeof(panel_option), 0444);
471 MODULE_PARM_DESC(panel, "size of attached flat panel (<x>x<y>)");
472
473 MODULE_DESCRIPTION("framebuffer driver for the AMD Geode GX1");
474 MODULE_LICENSE("GPL");
Linux with added FPC-III support