2 * Geode LX framebuffer driver.
4 * Copyright (C) 2007 Advanced Micro Devices, Inc.
5 * Built from gxfb (which is Copyright (C) 2006 Arcom Control Systems Ltd.)
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/errno.h>
16 #include <linux/string.h>
17 #include <linux/console.h>
19 #include <linux/slab.h>
20 #include <linux/suspend.h>
21 #include <linux/delay.h>
23 #include <linux/init.h>
24 #include <linux/pci.h>
25 #include <linux/uaccess.h>
29 static char *mode_option;
30 static int noclear, nopanel, nocrt;
34 /* Most of these modes are sorted in ascending order, but
35 * since the first entry in this table is the "default" mode,
36 * we try to make it something sane - 640x480-60 is sane
39 static struct fb_videomode geode_modedb[] __initdata = {
41 { NULL, 60, 640, 480, 39682, 48, 8, 25, 2, 88, 2,
42 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
43 FB_VMODE_NONINTERLACED, 0 },
45 { NULL, 70, 640, 400, 39770, 40, 8, 28, 5, 96, 2,
47 FB_VMODE_NONINTERLACED, 0 },
49 { NULL, 70, 640, 480, 35014, 88, 24, 15, 2, 64, 3,
50 0, FB_VMODE_NONINTERLACED, 0 },
52 { NULL, 72, 640, 480, 32102, 120, 16, 20, 1, 40, 3,
53 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
54 FB_VMODE_NONINTERLACED, 0 },
56 { NULL, 75, 640, 480, 31746, 120, 16, 16, 1, 64, 3,
57 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
58 FB_VMODE_NONINTERLACED, 0 },
60 { NULL, 85, 640, 480, 27780, 80, 56, 25, 1, 56, 3,
61 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
62 FB_VMODE_NONINTERLACED, 0 },
64 { NULL, 90, 640, 480, 26392, 96, 32, 22, 1, 64, 3,
65 0, FB_VMODE_NONINTERLACED, 0 },
67 { NULL, 100, 640, 480, 23167, 104, 40, 25, 1, 64, 3,
68 0, FB_VMODE_NONINTERLACED, 0 },
70 { NULL, 60, 640, 480, 39682, 48, 16, 25, 10, 88, 2,
71 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
72 FB_VMODE_NONINTERLACED, 0 },
74 { NULL, 56, 800, 600, 27901, 128, 24, 22, 1, 72, 2,
75 0, FB_VMODE_NONINTERLACED, 0 },
77 { NULL, 60, 800, 600, 25131, 72, 32, 23, 1, 136, 4,
78 0, FB_VMODE_NONINTERLACED, 0 },
80 { NULL, 70, 800, 600, 21873, 120, 40, 21, 4, 80, 3,
81 0, FB_VMODE_NONINTERLACED, 0 },
83 { NULL, 72, 800, 600, 20052, 64, 56, 23, 37, 120, 6,
84 0, FB_VMODE_NONINTERLACED, 0 },
86 { NULL, 75, 800, 600, 20202, 160, 16, 21, 1, 80, 3,
87 0, FB_VMODE_NONINTERLACED, 0 },
89 { NULL, 85, 800, 600, 17790, 152, 32, 27, 1, 64, 3,
90 0, FB_VMODE_NONINTERLACED, 0 },
92 { NULL, 90, 800, 600, 16648, 128, 40, 28, 1, 88, 3,
93 0, FB_VMODE_NONINTERLACED, 0 },
95 { NULL, 100, 800, 600, 14667, 136, 48, 27, 1, 88, 3,
96 0, FB_VMODE_NONINTERLACED, 0 },
98 { NULL, 60, 800, 600, 25131, 88, 40, 23, 1, 128, 4,
99 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
100 FB_VMODE_NONINTERLACED, 0 },
102 { NULL, 60, 1024, 768, 15385, 160, 24, 29, 3, 136, 6,
103 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
104 FB_VMODE_NONINTERLACED, 0 },
106 { NULL, 70, 1024, 768, 13346, 144, 24, 29, 3, 136, 6,
107 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
108 FB_VMODE_NONINTERLACED, 0 },
110 { NULL, 72, 1024, 768, 12702, 168, 56, 29, 4, 112, 3,
111 0, FB_VMODE_NONINTERLACED, 0 },
113 { NULL, 75, 1024, 768, 12703, 176, 16, 28, 1, 96, 3,
114 0, FB_VMODE_NONINTERLACED, 0 },
116 { NULL, 85, 1024, 768, 10581, 208, 48, 36, 1, 96, 3,
117 0, FB_VMODE_NONINTERLACED, 0 },
119 { NULL, 90, 1024, 768, 9981, 176, 64, 37, 1, 112, 3,
120 0, FB_VMODE_NONINTERLACED, 0 },
122 { NULL, 100, 1024, 768, 8825, 184, 72, 42, 1, 112, 3,
123 0, FB_VMODE_NONINTERLACED, 0 },
125 { NULL, 60, 1024, 768, 15385, 160, 24, 29, 3, 136, 6,
126 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
127 FB_VMODE_NONINTERLACED, 0 },
129 { NULL, 60, 1152, 864, 12251, 184, 64, 27, 1, 120, 3,
130 0, FB_VMODE_NONINTERLACED, 0 },
132 { NULL, 70, 1152, 864, 10254, 192, 72, 32, 8, 120, 3,
133 0, FB_VMODE_NONINTERLACED, 0 },
135 { NULL, 72, 1152, 864, 9866, 200, 72, 33, 7, 128, 3,
136 0, FB_VMODE_NONINTERLACED, 0 },
138 { NULL, 75, 1152, 864, 9259, 256, 64, 32, 1, 128, 3,
139 0, FB_VMODE_NONINTERLACED, 0 },
141 { NULL, 85, 1152, 864, 8357, 200, 72, 37, 3, 128, 3,
142 0, FB_VMODE_NONINTERLACED, 0 },
144 { NULL, 90, 1152, 864, 7719, 208, 80, 42, 9, 128, 3,
145 0, FB_VMODE_NONINTERLACED, 0 },
147 { NULL, 100, 1152, 864, 6947, 208, 80, 48, 3, 128, 3,
148 0, FB_VMODE_NONINTERLACED, 0 },
150 { NULL, 60, 1152, 864, 12251, 184, 64, 27, 1, 120, 3,
151 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
152 FB_VMODE_NONINTERLACED, 0 },
154 { NULL, 60, 1280, 1024, 9262, 248, 48, 38, 1, 112, 3,
155 0, FB_VMODE_NONINTERLACED, 0 },
157 { NULL, 70, 1280, 1024, 7719, 224, 88, 38, 6, 136, 3,
158 0, FB_VMODE_NONINTERLACED, 0 },
160 { NULL, 72, 1280, 1024, 7490, 224, 88, 39, 7, 136, 3,
161 0, FB_VMODE_NONINTERLACED, 0 },
163 { NULL, 75, 1280, 1024, 7409, 248, 16, 38, 1, 144, 3,
164 0, FB_VMODE_NONINTERLACED, 0 },
166 { NULL, 85, 1280, 1024, 6351, 224, 64, 44, 1, 160, 3,
167 0, FB_VMODE_NONINTERLACED, 0 },
169 { NULL, 90, 1280, 1024, 5791, 240, 96, 51, 12, 144, 3,
170 0, FB_VMODE_NONINTERLACED, 0 },
172 { NULL, 100, 1280, 1024, 5212, 240, 96, 57, 6, 144, 3,
173 0, FB_VMODE_NONINTERLACED, 0 },
175 { NULL, 60, 1280, 1024, 9262, 248, 48, 38, 1, 112, 3,
176 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
177 FB_VMODE_NONINTERLACED, 0 },
179 { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
180 0, FB_VMODE_NONINTERLACED, 0 },
182 { NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
183 0, FB_VMODE_NONINTERLACED, 0 },
185 { NULL, 72, 1600, 1200, 5053, 288, 112, 47, 13, 176, 3,
186 0, FB_VMODE_NONINTERLACED, 0 },
188 { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
189 0, FB_VMODE_NONINTERLACED, 0 },
191 { NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3,
192 0, FB_VMODE_NONINTERLACED, 0 },
194 { NULL, 90, 1600, 1200, 3981, 304, 128, 60, 1, 176, 3,
195 0, FB_VMODE_NONINTERLACED, 0 },
197 { NULL, 100, 1600, 1200, 3563, 304, 128, 67, 1, 176, 3,
198 0, FB_VMODE_NONINTERLACED, 0 },
200 { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
201 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
202 FB_VMODE_NONINTERLACED, 0 },
204 { NULL, 60, 1920, 1440, 4273, 344, 128, 56, 1, 208, 3,
205 0, FB_VMODE_NONINTERLACED, 0 },
207 { NULL, 70, 1920, 1440, 3593, 360, 152, 55, 8, 208, 3,
208 0, FB_VMODE_NONINTERLACED, 0 },
210 { NULL, 72, 1920, 1440, 3472, 360, 152, 68, 4, 208, 3,
211 0, FB_VMODE_NONINTERLACED, 0 },
213 { NULL, 75, 1920, 1440, 3367, 352, 144, 56, 1, 224, 3,
214 0, FB_VMODE_NONINTERLACED, 0 },
216 { NULL, 85, 1920, 1440, 2929, 368, 152, 68, 1, 216, 3,
217 0, FB_VMODE_NONINTERLACED, 0 },
221 #include <asm/olpc.h>
223 static struct fb_videomode olpc_dcon_modedb[] __initdata = {
224 /* The only mode the DCON has is 1200x900 */
225 { NULL, 50, 1200, 900, 17460, 24, 8, 4, 5, 8, 3,
226 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
227 FB_VMODE_NONINTERLACED, 0 }
230 static void __init get_modedb(struct fb_videomode **modedb, unsigned int *size)
232 if (olpc_has_dcon()) {
233 *modedb = (struct fb_videomode *) olpc_dcon_modedb;
234 *size = ARRAY_SIZE(olpc_dcon_modedb);
236 *modedb = (struct fb_videomode *) geode_modedb;
237 *size = ARRAY_SIZE(geode_modedb);
242 static void __init get_modedb(struct fb_videomode **modedb, unsigned int *size)
244 *modedb = (struct fb_videomode *) geode_modedb;
245 *size = ARRAY_SIZE(geode_modedb);
249 static int lxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
251 if (var->xres > 1920 || var->yres > 1440)
254 if (var->bits_per_pixel == 32) {
255 var->red.offset = 16; var->red.length = 8;
256 var->green.offset = 8; var->green.length = 8;
257 var->blue.offset = 0; var->blue.length = 8;
258 } else if (var->bits_per_pixel == 16) {
259 var->red.offset = 11; var->red.length = 5;
260 var->green.offset = 5; var->green.length = 6;
261 var->blue.offset = 0; var->blue.length = 5;
262 } else if (var->bits_per_pixel == 8) {
263 var->red.offset = 0; var->red.length = 8;
264 var->green.offset = 0; var->green.length = 8;
265 var->blue.offset = 0; var->blue.length = 8;
269 var->transp.offset = 0; var->transp.length = 0;
271 /* Enough video memory? */
272 if ((lx_get_pitch(var->xres, var->bits_per_pixel) * var->yres)
273 > info->fix.smem_len)
279 static int lxfb_set_par(struct fb_info *info)
281 if (info->var.bits_per_pixel > 8) {
282 info->fix.visual = FB_VISUAL_TRUECOLOR;
283 fb_dealloc_cmap(&info->cmap);
285 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
286 fb_alloc_cmap(&info->cmap, 1<<info->var.bits_per_pixel, 0);
289 info->fix.line_length = lx_get_pitch(info->var.xres,
290 info->var.bits_per_pixel);
296 static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
299 chan >>= 16 - bf->length;
300 return chan << bf->offset;
303 static int lxfb_setcolreg(unsigned regno, unsigned red, unsigned green,
304 unsigned blue, unsigned transp,
305 struct fb_info *info)
307 if (info->var.grayscale) {
308 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
309 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
312 /* Truecolor has hardware independent palette */
313 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
314 u32 *pal = info->pseudo_palette;
320 v = chan_to_field(red, &info->var.red);
321 v |= chan_to_field(green, &info->var.green);
322 v |= chan_to_field(blue, &info->var.blue);
329 lx_set_palette_reg(info, regno, red, green, blue);
335 static int lxfb_blank(int blank_mode, struct fb_info *info)
337 return lx_blank_display(info, blank_mode);
341 static int __init lxfb_map_video_memory(struct fb_info *info,
344 struct lxfb_par *par = info->par;
347 ret = pci_enable_device(dev);
352 ret = pci_request_region(dev, 0, "lxfb-framebuffer");
357 ret = pci_request_region(dev, 1, "lxfb-gp");
362 ret = pci_request_region(dev, 2, "lxfb-vg");
367 ret = pci_request_region(dev, 3, "lxfb-vp");
372 info->fix.smem_start = pci_resource_start(dev, 0);
373 info->fix.smem_len = vram ? vram : lx_framebuffer_size();
375 info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
379 if (info->screen_base == NULL)
382 par->gp_regs = ioremap(pci_resource_start(dev, 1),
383 pci_resource_len(dev, 1));
385 if (par->gp_regs == NULL)
388 par->dc_regs = ioremap(pci_resource_start(dev, 2),
389 pci_resource_len(dev, 2));
391 if (par->dc_regs == NULL)
394 par->vp_regs = ioremap(pci_resource_start(dev, 3),
395 pci_resource_len(dev, 3));
397 if (par->vp_regs == NULL)
400 write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK);
401 write_dc(par, DC_GLIU0_MEM_OFFSET, info->fix.smem_start & 0xFF000000);
402 write_dc(par, DC_UNLOCK, DC_UNLOCK_LOCK);
404 dev_info(&dev->dev, "%d KB of video memory at 0x%lx\n",
405 info->fix.smem_len / 1024, info->fix.smem_start);
410 static struct fb_ops lxfb_ops = {
411 .owner = THIS_MODULE,
412 .fb_check_var = lxfb_check_var,
413 .fb_set_par = lxfb_set_par,
414 .fb_setcolreg = lxfb_setcolreg,
415 .fb_blank = lxfb_blank,
416 /* No HW acceleration for now. */
417 .fb_fillrect = cfb_fillrect,
418 .fb_copyarea = cfb_copyarea,
419 .fb_imageblit = cfb_imageblit,
422 static struct fb_info * __init lxfb_init_fbinfo(struct device *dev)
424 struct lxfb_par *par;
425 struct fb_info *info;
427 /* Alloc enough space for the pseudo palette. */
428 info = framebuffer_alloc(sizeof(struct lxfb_par) + sizeof(u32) * 16,
435 strcpy(info->fix.id, "Geode LX");
437 info->fix.type = FB_TYPE_PACKED_PIXELS;
438 info->fix.type_aux = 0;
439 info->fix.xpanstep = 0;
440 info->fix.ypanstep = 0;
441 info->fix.ywrapstep = 0;
442 info->fix.accel = FB_ACCEL_NONE;
444 info->var.nonstd = 0;
445 info->var.activate = FB_ACTIVATE_NOW;
446 info->var.height = -1;
447 info->var.width = -1;
448 info->var.accel_flags = 0;
449 info->var.vmode = FB_VMODE_NONINTERLACED;
451 info->fbops = &lxfb_ops;
452 info->flags = FBINFO_DEFAULT;
455 info->pseudo_palette = (void *)par + sizeof(struct lxfb_par);
457 info->var.grayscale = 0;
463 static int lxfb_suspend(struct pci_dev *pdev, pm_message_t state)
465 struct fb_info *info = pci_get_drvdata(pdev);
467 if (state.event == PM_EVENT_SUSPEND) {
468 acquire_console_sem();
470 fb_set_suspend(info, 1);
471 release_console_sem();
474 /* there's no point in setting PCI states; we emulate PCI, so
475 * we don't end up getting power savings anyways */
480 static int lxfb_resume(struct pci_dev *pdev)
482 struct fb_info *info = pci_get_drvdata(pdev);
485 acquire_console_sem();
486 ret = lx_powerup(info);
488 printk(KERN_ERR "lxfb: power up failed!\n");
492 fb_set_suspend(info, 0);
493 release_console_sem();
497 #define lxfb_suspend NULL
498 #define lxfb_resume NULL
501 static int __init lxfb_probe(struct pci_dev *pdev,
502 const struct pci_device_id *id)
504 struct lxfb_par *par;
505 struct fb_info *info;
508 struct fb_videomode *modedb_ptr;
509 unsigned int modedb_size;
511 info = lxfb_init_fbinfo(&pdev->dev);
518 ret = lxfb_map_video_memory(info, pdev);
522 "failed to map frame buffer or controller registers\n");
526 /* Set up the desired outputs */
529 par->output |= (nopanel) ? 0 : OUTPUT_PANEL;
530 par->output |= (nocrt) ? 0 : OUTPUT_CRT;
532 /* Set up the mode database */
534 get_modedb(&modedb_ptr, &modedb_size);
535 ret = fb_find_mode(&info->var, info, mode_option,
536 modedb_ptr, modedb_size, NULL, 16);
538 if (ret == 0 || ret == 4) {
539 dev_err(&pdev->dev, "could not find valid video mode\n");
544 /* Clear the screen of garbage, unless noclear was specified,
545 * in which case we assume the user knows what he is doing */
548 memset_io(info->screen_base, 0, info->fix.smem_len);
552 lxfb_check_var(&info->var, info);
555 pm_set_vt_switch(vt_switch);
557 if (register_framebuffer(info) < 0) {
561 pci_set_drvdata(pdev, info);
562 printk(KERN_INFO "fb%d: %s frame buffer device\n",
563 info->node, info->fix.id);
568 if (info->screen_base) {
569 iounmap(info->screen_base);
570 pci_release_region(pdev, 0);
573 iounmap(par->gp_regs);
574 pci_release_region(pdev, 1);
577 iounmap(par->dc_regs);
578 pci_release_region(pdev, 2);
581 iounmap(par->vp_regs);
582 pci_release_region(pdev, 3);
586 framebuffer_release(info);
591 static void lxfb_remove(struct pci_dev *pdev)
593 struct fb_info *info = pci_get_drvdata(pdev);
594 struct lxfb_par *par = info->par;
596 unregister_framebuffer(info);
598 iounmap(info->screen_base);
599 pci_release_region(pdev, 0);
601 iounmap(par->gp_regs);
602 pci_release_region(pdev, 1);
604 iounmap(par->dc_regs);
605 pci_release_region(pdev, 2);
607 iounmap(par->vp_regs);
608 pci_release_region(pdev, 3);
610 pci_set_drvdata(pdev, NULL);
611 framebuffer_release(info);
614 static struct pci_device_id lxfb_id_table[] = {
615 { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LX_VIDEO) },
619 MODULE_DEVICE_TABLE(pci, lxfb_id_table);
621 static struct pci_driver lxfb_driver = {
623 .id_table = lxfb_id_table,
625 .remove = lxfb_remove,
626 .suspend = lxfb_suspend,
627 .resume = lxfb_resume,
631 static int __init lxfb_setup(char *options)
635 if (!options || !*options)
638 while ((opt = strsep(&options, ",")) != NULL) {
642 if (!strcmp(opt, "noclear"))
644 else if (!strcmp(opt, "nopanel"))
646 else if (!strcmp(opt, "nocrt"))
656 static int __init lxfb_init(void)
661 if (fb_get_options("lxfb", &option))
666 return pci_register_driver(&lxfb_driver);
668 static void __exit lxfb_cleanup(void)
670 pci_unregister_driver(&lxfb_driver);
673 module_init(lxfb_init);
674 module_exit(lxfb_cleanup);
676 module_param(mode_option, charp, 0);
677 MODULE_PARM_DESC(mode_option, "video mode (<x>x<y>[-<bpp>][@<refr>])");
679 module_param(vram, int, 0);
680 MODULE_PARM_DESC(vram, "video memory size");
682 module_param(vt_switch, int, 0);
683 MODULE_PARM_DESC(vt_switch, "enable VT switch during suspend/resume");
685 MODULE_DESCRIPTION("Framebuffer driver for the AMD Geode LX");
686 MODULE_LICENSE("GPL");