1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Geode LX framebuffer driver.
5 * Copyright (C) 2007 Advanced Micro Devices, Inc.
6 * Built from gxfb (which is Copyright (C) 2006 Arcom Control Systems Ltd.)
9 #include <linux/aperture.h>
10 #include <linux/module.h>
11 #include <linux/kernel.h>
12 #include <linux/errno.h>
13 #include <linux/string.h>
14 #include <linux/console.h>
16 #include <linux/suspend.h>
17 #include <linux/delay.h>
19 #include <linux/init.h>
20 #include <linux/pci.h>
21 #include <linux/uaccess.h>
27 static char *mode_option;
28 static int noclear, nopanel, nocrt;
32 /* Most of these modes are sorted in ascending order, but
33 * since the first entry in this table is the "default" mode,
34 * we try to make it something sane - 640x480-60 is sane
37 static struct fb_videomode geode_modedb[] = {
39 { NULL, 60, 640, 480, 39682, 48, 8, 25, 2, 88, 2,
40 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
41 FB_VMODE_NONINTERLACED, 0 },
43 { NULL, 70, 640, 400, 39770, 40, 8, 28, 5, 96, 2,
45 FB_VMODE_NONINTERLACED, 0 },
47 { NULL, 70, 640, 480, 35014, 88, 24, 15, 2, 64, 3,
48 0, FB_VMODE_NONINTERLACED, 0 },
50 { NULL, 72, 640, 480, 32102, 120, 16, 20, 1, 40, 3,
51 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
52 FB_VMODE_NONINTERLACED, 0 },
54 { NULL, 75, 640, 480, 31746, 120, 16, 16, 1, 64, 3,
55 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
56 FB_VMODE_NONINTERLACED, 0 },
58 { NULL, 85, 640, 480, 27780, 80, 56, 25, 1, 56, 3,
59 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
60 FB_VMODE_NONINTERLACED, 0 },
62 { NULL, 90, 640, 480, 26392, 96, 32, 22, 1, 64, 3,
63 0, FB_VMODE_NONINTERLACED, 0 },
65 { NULL, 100, 640, 480, 23167, 104, 40, 25, 1, 64, 3,
66 0, FB_VMODE_NONINTERLACED, 0 },
68 { NULL, 60, 640, 480, 39682, 48, 16, 25, 10, 88, 2,
69 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
70 FB_VMODE_NONINTERLACED, 0 },
72 { NULL, 56, 800, 600, 27901, 128, 24, 22, 1, 72, 2,
73 0, FB_VMODE_NONINTERLACED, 0 },
75 { NULL, 60, 800, 600, 25131, 72, 32, 23, 1, 136, 4,
76 0, FB_VMODE_NONINTERLACED, 0 },
78 { NULL, 70, 800, 600, 21873, 120, 40, 21, 4, 80, 3,
79 0, FB_VMODE_NONINTERLACED, 0 },
81 { NULL, 72, 800, 600, 20052, 64, 56, 23, 37, 120, 6,
82 0, FB_VMODE_NONINTERLACED, 0 },
84 { NULL, 75, 800, 600, 20202, 160, 16, 21, 1, 80, 3,
85 0, FB_VMODE_NONINTERLACED, 0 },
87 { NULL, 85, 800, 600, 17790, 152, 32, 27, 1, 64, 3,
88 0, FB_VMODE_NONINTERLACED, 0 },
90 { NULL, 90, 800, 600, 16648, 128, 40, 28, 1, 88, 3,
91 0, FB_VMODE_NONINTERLACED, 0 },
93 { NULL, 100, 800, 600, 14667, 136, 48, 27, 1, 88, 3,
94 0, FB_VMODE_NONINTERLACED, 0 },
96 { NULL, 60, 800, 600, 25131, 88, 40, 23, 1, 128, 4,
97 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
98 FB_VMODE_NONINTERLACED, 0 },
100 { NULL, 60, 1024, 768, 15385, 160, 24, 29, 3, 136, 6,
101 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
102 FB_VMODE_NONINTERLACED, 0 },
104 { NULL, 70, 1024, 768, 13346, 144, 24, 29, 3, 136, 6,
105 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
106 FB_VMODE_NONINTERLACED, 0 },
108 { NULL, 72, 1024, 768, 12702, 168, 56, 29, 4, 112, 3,
109 0, FB_VMODE_NONINTERLACED, 0 },
111 { NULL, 75, 1024, 768, 12703, 176, 16, 28, 1, 96, 3,
112 0, FB_VMODE_NONINTERLACED, 0 },
114 { NULL, 85, 1024, 768, 10581, 208, 48, 36, 1, 96, 3,
115 0, FB_VMODE_NONINTERLACED, 0 },
117 { NULL, 90, 1024, 768, 9981, 176, 64, 37, 1, 112, 3,
118 0, FB_VMODE_NONINTERLACED, 0 },
120 { NULL, 100, 1024, 768, 8825, 184, 72, 42, 1, 112, 3,
121 0, FB_VMODE_NONINTERLACED, 0 },
123 { NULL, 60, 1024, 768, 15385, 160, 24, 29, 3, 136, 6,
124 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
125 FB_VMODE_NONINTERLACED, 0 },
127 { NULL, 60, 1152, 864, 12251, 184, 64, 27, 1, 120, 3,
128 0, FB_VMODE_NONINTERLACED, 0 },
130 { NULL, 70, 1152, 864, 10254, 192, 72, 32, 8, 120, 3,
131 0, FB_VMODE_NONINTERLACED, 0 },
133 { NULL, 72, 1152, 864, 9866, 200, 72, 33, 7, 128, 3,
134 0, FB_VMODE_NONINTERLACED, 0 },
136 { NULL, 75, 1152, 864, 9259, 256, 64, 32, 1, 128, 3,
137 0, FB_VMODE_NONINTERLACED, 0 },
139 { NULL, 85, 1152, 864, 8357, 200, 72, 37, 3, 128, 3,
140 0, FB_VMODE_NONINTERLACED, 0 },
142 { NULL, 90, 1152, 864, 7719, 208, 80, 42, 9, 128, 3,
143 0, FB_VMODE_NONINTERLACED, 0 },
145 { NULL, 100, 1152, 864, 6947, 208, 80, 48, 3, 128, 3,
146 0, FB_VMODE_NONINTERLACED, 0 },
148 { NULL, 60, 1152, 864, 12251, 184, 64, 27, 1, 120, 3,
149 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
150 FB_VMODE_NONINTERLACED, 0 },
152 { NULL, 60, 1280, 1024, 9262, 248, 48, 38, 1, 112, 3,
153 0, FB_VMODE_NONINTERLACED, 0 },
155 { NULL, 70, 1280, 1024, 7719, 224, 88, 38, 6, 136, 3,
156 0, FB_VMODE_NONINTERLACED, 0 },
158 { NULL, 72, 1280, 1024, 7490, 224, 88, 39, 7, 136, 3,
159 0, FB_VMODE_NONINTERLACED, 0 },
161 { NULL, 75, 1280, 1024, 7409, 248, 16, 38, 1, 144, 3,
162 0, FB_VMODE_NONINTERLACED, 0 },
164 { NULL, 85, 1280, 1024, 6351, 224, 64, 44, 1, 160, 3,
165 0, FB_VMODE_NONINTERLACED, 0 },
167 { NULL, 90, 1280, 1024, 5791, 240, 96, 51, 12, 144, 3,
168 0, FB_VMODE_NONINTERLACED, 0 },
170 { NULL, 100, 1280, 1024, 5212, 240, 96, 57, 6, 144, 3,
171 0, FB_VMODE_NONINTERLACED, 0 },
173 { NULL, 60, 1280, 1024, 9262, 248, 48, 38, 1, 112, 3,
174 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
175 FB_VMODE_NONINTERLACED, 0 },
177 { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
178 0, FB_VMODE_NONINTERLACED, 0 },
180 { NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
181 0, FB_VMODE_NONINTERLACED, 0 },
183 { NULL, 72, 1600, 1200, 5053, 288, 112, 47, 13, 176, 3,
184 0, FB_VMODE_NONINTERLACED, 0 },
186 { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
187 0, FB_VMODE_NONINTERLACED, 0 },
189 { NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3,
190 0, FB_VMODE_NONINTERLACED, 0 },
192 { NULL, 90, 1600, 1200, 3981, 304, 128, 60, 1, 176, 3,
193 0, FB_VMODE_NONINTERLACED, 0 },
195 { NULL, 100, 1600, 1200, 3563, 304, 128, 67, 1, 176, 3,
196 0, FB_VMODE_NONINTERLACED, 0 },
198 { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
199 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
200 FB_VMODE_NONINTERLACED, 0 },
202 { NULL, 60, 1920, 1440, 4273, 344, 128, 56, 1, 208, 3,
203 0, FB_VMODE_NONINTERLACED, 0 },
205 { NULL, 70, 1920, 1440, 3593, 360, 152, 55, 8, 208, 3,
206 0, FB_VMODE_NONINTERLACED, 0 },
208 { NULL, 72, 1920, 1440, 3472, 360, 152, 68, 4, 208, 3,
209 0, FB_VMODE_NONINTERLACED, 0 },
211 { NULL, 75, 1920, 1440, 3367, 352, 144, 56, 1, 224, 3,
212 0, FB_VMODE_NONINTERLACED, 0 },
214 { NULL, 85, 1920, 1440, 2929, 368, 152, 68, 1, 216, 3,
215 0, FB_VMODE_NONINTERLACED, 0 },
218 static struct fb_videomode olpc_dcon_modedb[] = {
219 /* The only mode the DCON has is 1200x900 */
220 { NULL, 50, 1200, 900, 17460, 24, 8, 4, 5, 8, 3,
221 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
222 FB_VMODE_NONINTERLACED, 0 }
225 static void get_modedb(struct fb_videomode **modedb, unsigned int *size)
227 if (olpc_has_dcon()) {
228 *modedb = (struct fb_videomode *) olpc_dcon_modedb;
229 *size = ARRAY_SIZE(olpc_dcon_modedb);
231 *modedb = (struct fb_videomode *) geode_modedb;
232 *size = ARRAY_SIZE(geode_modedb);
236 static int lxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
241 if (var->xres > 1920 || var->yres > 1440)
244 if (var->bits_per_pixel == 32) {
245 var->red.offset = 16; var->red.length = 8;
246 var->green.offset = 8; var->green.length = 8;
247 var->blue.offset = 0; var->blue.length = 8;
248 } else if (var->bits_per_pixel == 16) {
249 var->red.offset = 11; var->red.length = 5;
250 var->green.offset = 5; var->green.length = 6;
251 var->blue.offset = 0; var->blue.length = 5;
252 } else if (var->bits_per_pixel == 8) {
253 var->red.offset = 0; var->red.length = 8;
254 var->green.offset = 0; var->green.length = 8;
255 var->blue.offset = 0; var->blue.length = 8;
259 var->transp.offset = 0; var->transp.length = 0;
261 /* Enough video memory? */
262 if ((lx_get_pitch(var->xres, var->bits_per_pixel) * var->yres)
263 > info->fix.smem_len)
269 static int lxfb_set_par(struct fb_info *info)
271 if (info->var.bits_per_pixel > 8)
272 info->fix.visual = FB_VISUAL_TRUECOLOR;
274 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
276 info->fix.line_length = lx_get_pitch(info->var.xres,
277 info->var.bits_per_pixel);
283 static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
286 chan >>= 16 - bf->length;
287 return chan << bf->offset;
290 static int lxfb_setcolreg(unsigned regno, unsigned red, unsigned green,
291 unsigned blue, unsigned transp,
292 struct fb_info *info)
294 if (info->var.grayscale) {
295 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
296 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
299 /* Truecolor has hardware independent palette */
300 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
301 u32 *pal = info->pseudo_palette;
307 v = chan_to_field(red, &info->var.red);
308 v |= chan_to_field(green, &info->var.green);
309 v |= chan_to_field(blue, &info->var.blue);
316 lx_set_palette_reg(info, regno, red, green, blue);
322 static int lxfb_blank(int blank_mode, struct fb_info *info)
324 return lx_blank_display(info, blank_mode);
328 static int lxfb_map_video_memory(struct fb_info *info, struct pci_dev *dev)
330 struct lxfb_par *par = info->par;
333 ret = pci_enable_device(dev);
338 ret = pci_request_region(dev, 0, "lxfb-framebuffer");
343 ret = pci_request_region(dev, 1, "lxfb-gp");
348 ret = pci_request_region(dev, 2, "lxfb-vg");
353 ret = pci_request_region(dev, 3, "lxfb-vp");
358 info->fix.smem_start = pci_resource_start(dev, 0);
359 info->fix.smem_len = vram ? vram : lx_framebuffer_size();
361 info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
365 if (info->screen_base == NULL)
368 par->gp_regs = pci_ioremap_bar(dev, 1);
370 if (par->gp_regs == NULL)
373 par->dc_regs = pci_ioremap_bar(dev, 2);
375 if (par->dc_regs == NULL)
378 par->vp_regs = pci_ioremap_bar(dev, 3);
380 if (par->vp_regs == NULL)
383 write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK);
384 write_dc(par, DC_GLIU0_MEM_OFFSET, info->fix.smem_start & 0xFF000000);
385 write_dc(par, DC_UNLOCK, DC_UNLOCK_LOCK);
387 dev_info(&dev->dev, "%d KB of video memory at 0x%lx\n",
388 info->fix.smem_len / 1024, info->fix.smem_start);
393 static const struct fb_ops lxfb_ops = {
394 .owner = THIS_MODULE,
395 .fb_check_var = lxfb_check_var,
396 .fb_set_par = lxfb_set_par,
397 .fb_setcolreg = lxfb_setcolreg,
398 .fb_blank = lxfb_blank,
399 /* No HW acceleration for now. */
400 .fb_fillrect = cfb_fillrect,
401 .fb_copyarea = cfb_copyarea,
402 .fb_imageblit = cfb_imageblit,
405 static struct fb_info *lxfb_init_fbinfo(struct device *dev)
407 struct lxfb_par *par;
408 struct fb_info *info;
410 /* Alloc enough space for the pseudo palette. */
411 info = framebuffer_alloc(sizeof(struct lxfb_par) + sizeof(u32) * 16,
418 strcpy(info->fix.id, "Geode LX");
420 info->fix.type = FB_TYPE_PACKED_PIXELS;
421 info->fix.type_aux = 0;
422 info->fix.xpanstep = 0;
423 info->fix.ypanstep = 0;
424 info->fix.ywrapstep = 0;
425 info->fix.accel = FB_ACCEL_NONE;
427 info->var.nonstd = 0;
428 info->var.activate = FB_ACTIVATE_NOW;
429 info->var.height = -1;
430 info->var.width = -1;
431 info->var.accel_flags = 0;
432 info->var.vmode = FB_VMODE_NONINTERLACED;
434 info->fbops = &lxfb_ops;
435 info->flags = FBINFO_DEFAULT;
438 info->pseudo_palette = (void *)par + sizeof(struct lxfb_par);
440 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
441 framebuffer_release(info);
445 info->var.grayscale = 0;
450 static int __maybe_unused lxfb_suspend(struct device *dev)
452 struct fb_info *info = dev_get_drvdata(dev);
456 fb_set_suspend(info, 1);
459 /* there's no point in setting PCI states; we emulate PCI, so
460 * we don't end up getting power savings anyways */
465 static int __maybe_unused lxfb_resume(struct device *dev)
467 struct fb_info *info = dev_get_drvdata(dev);
471 ret = lx_powerup(info);
473 printk(KERN_ERR "lxfb: power up failed!\n");
477 fb_set_suspend(info, 0);
482 static int lxfb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
484 struct lxfb_par *par;
485 struct fb_info *info;
488 struct fb_videomode *modedb_ptr;
489 unsigned int modedb_size;
491 ret = aperture_remove_conflicting_pci_devices(pdev, "lxfb");
495 info = lxfb_init_fbinfo(&pdev->dev);
502 ret = lxfb_map_video_memory(info, pdev);
506 "failed to map frame buffer or controller registers\n");
510 /* Set up the desired outputs */
513 par->output |= (nopanel) ? 0 : OUTPUT_PANEL;
514 par->output |= (nocrt) ? 0 : OUTPUT_CRT;
516 /* Set up the mode database */
518 get_modedb(&modedb_ptr, &modedb_size);
519 ret = fb_find_mode(&info->var, info, mode_option,
520 modedb_ptr, modedb_size, NULL, 16);
522 if (ret == 0 || ret == 4) {
523 dev_err(&pdev->dev, "could not find valid video mode\n");
528 /* Clear the screen of garbage, unless noclear was specified,
529 * in which case we assume the user knows what he is doing */
532 memset_io(info->screen_base, 0, info->fix.smem_len);
536 lxfb_check_var(&info->var, info);
539 pm_set_vt_switch(vt_switch);
541 if (register_framebuffer(info) < 0) {
545 pci_set_drvdata(pdev, info);
546 fb_info(info, "%s frame buffer device\n", info->fix.id);
551 if (info->screen_base) {
552 iounmap(info->screen_base);
553 pci_release_region(pdev, 0);
556 iounmap(par->gp_regs);
557 pci_release_region(pdev, 1);
560 iounmap(par->dc_regs);
561 pci_release_region(pdev, 2);
564 iounmap(par->vp_regs);
565 pci_release_region(pdev, 3);
568 fb_dealloc_cmap(&info->cmap);
569 framebuffer_release(info);
574 static void lxfb_remove(struct pci_dev *pdev)
576 struct fb_info *info = pci_get_drvdata(pdev);
577 struct lxfb_par *par = info->par;
579 unregister_framebuffer(info);
581 iounmap(info->screen_base);
582 pci_release_region(pdev, 0);
584 iounmap(par->gp_regs);
585 pci_release_region(pdev, 1);
587 iounmap(par->dc_regs);
588 pci_release_region(pdev, 2);
590 iounmap(par->vp_regs);
591 pci_release_region(pdev, 3);
593 fb_dealloc_cmap(&info->cmap);
594 framebuffer_release(info);
597 static struct pci_device_id lxfb_id_table[] = {
598 { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LX_VIDEO) },
602 MODULE_DEVICE_TABLE(pci, lxfb_id_table);
604 static const struct dev_pm_ops lxfb_pm_ops = {
605 #ifdef CONFIG_PM_SLEEP
606 .suspend = lxfb_suspend,
607 .resume = lxfb_resume,
611 .restore = lxfb_resume,
615 static struct pci_driver lxfb_driver = {
617 .id_table = lxfb_id_table,
619 .remove = lxfb_remove,
620 .driver.pm = &lxfb_pm_ops,
624 static int __init lxfb_setup(char *options)
628 if (!options || !*options)
631 while ((opt = strsep(&options, ",")) != NULL) {
635 if (!strcmp(opt, "noclear"))
637 else if (!strcmp(opt, "nopanel"))
639 else if (!strcmp(opt, "nocrt"))
649 static int __init lxfb_init(void)
655 if (fb_modesetting_disabled("lxfb"))
659 if (fb_get_options("lxfb", &option))
664 return pci_register_driver(&lxfb_driver);
666 static void __exit lxfb_cleanup(void)
668 pci_unregister_driver(&lxfb_driver);
671 module_init(lxfb_init);
672 module_exit(lxfb_cleanup);
674 module_param(mode_option, charp, 0);
675 MODULE_PARM_DESC(mode_option, "video mode (<x>x<y>[-<bpp>][@<refr>])");
677 module_param(vram, int, 0);
678 MODULE_PARM_DESC(vram, "video memory size");
680 module_param(vt_switch, int, 0);
681 MODULE_PARM_DESC(vt_switch, "enable VT switch during suspend/resume");
683 MODULE_DESCRIPTION("Framebuffer driver for the AMD Geode LX");
684 MODULE_LICENSE("GPL");