2 * drivers/video/geode/gx1fb_core.c
3 * -- Geode GX1 framebuffer driver
5 * Copyright (C) 2005 Arcom Control Systems Ltd.
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.
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/errno.h>
16 #include <linux/string.h>
18 #include <linux/tty.h>
19 #include <linux/slab.h>
20 #include <linux/delay.h>
22 #include <linux/init.h>
23 #include <linux/pci.h>
26 #include "display_gx1.h"
27 #include "video_cs5530.h"
29 static char mode_option[32] = "640x480-16@60";
30 static int crt_option = 1;
31 static char panel_option[32] = "";
33 /* Modes relevant to the GX1 (taken from modedb.c) */
34 static const struct fb_videomode __initdata gx1_modedb[] = {
36 { NULL, 60, 640, 480, 39682, 48, 16, 33, 10, 96, 2,
37 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
39 { NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
40 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
42 { NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
43 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
45 { NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
46 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
47 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
49 { NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
50 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
51 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
53 { NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
54 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
55 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
56 /* 1024x768-60 VESA */
57 { NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
58 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
59 /* 1024x768-75 VESA */
60 { NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
61 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
62 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
63 /* 1024x768-85 VESA */
64 { NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
65 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
66 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
67 /* 1280x960-60 VESA */
68 { NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
69 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
70 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
71 /* 1280x960-85 VESA */
72 { NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
73 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
74 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
75 /* 1280x1024-60 VESA */
76 { NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
77 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
78 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
79 /* 1280x1024-75 VESA */
80 { NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
81 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
82 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
83 /* 1280x1024-85 VESA */
84 { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
85 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
86 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
89 static int gx1_line_delta(int xres, int bpp)
91 int line_delta = xres * (bpp >> 3);
93 if (line_delta > 2048)
95 else if (line_delta > 1024)
102 static int gx1fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
104 struct geodefb_par *par = info->par;
106 /* Maximum resolution is 1280x1024. */
107 if (var->xres > 1280 || var->yres > 1024)
110 if (par->panel_x && (var->xres > par->panel_x || var->yres > par->panel_y))
113 /* Only 16 bpp and 8 bpp is supported by the hardware. */
114 if (var->bits_per_pixel == 16) {
115 var->red.offset = 11; var->red.length = 5;
116 var->green.offset = 5; var->green.length = 6;
117 var->blue.offset = 0; var->blue.length = 5;
118 var->transp.offset = 0; var->transp.length = 0;
119 } else if (var->bits_per_pixel == 8) {
120 var->red.offset = 0; var->red.length = 8;
121 var->green.offset = 0; var->green.length = 8;
122 var->blue.offset = 0; var->blue.length = 8;
123 var->transp.offset = 0; var->transp.length = 0;
127 /* Enough video memory? */
128 if (gx1_line_delta(var->xres, var->bits_per_pixel) * var->yres > info->fix.smem_len)
131 /* FIXME: Check timing parameters here? */
136 static int gx1fb_set_par(struct fb_info *info)
138 struct geodefb_par *par = info->par;
140 if (info->var.bits_per_pixel == 16) {
141 info->fix.visual = FB_VISUAL_TRUECOLOR;
142 fb_dealloc_cmap(&info->cmap);
144 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
145 fb_alloc_cmap(&info->cmap, 1<<info->var.bits_per_pixel, 0);
148 info->fix.line_length = gx1_line_delta(info->var.xres, info->var.bits_per_pixel);
150 par->dc_ops->set_mode(info);
155 static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
158 chan >>= 16 - bf->length;
159 return chan << bf->offset;
162 static int gx1fb_setcolreg(unsigned regno, unsigned red, unsigned green,
163 unsigned blue, unsigned transp,
164 struct fb_info *info)
166 struct geodefb_par *par = info->par;
168 if (info->var.grayscale) {
169 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
170 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
173 /* Truecolor has hardware independent palette */
174 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
175 u32 *pal = info->pseudo_palette;
181 v = chan_to_field(red, &info->var.red);
182 v |= chan_to_field(green, &info->var.green);
183 v |= chan_to_field(blue, &info->var.blue);
190 par->dc_ops->set_palette_reg(info, regno, red, green, blue);
196 static int gx1fb_blank(int blank_mode, struct fb_info *info)
198 struct geodefb_par *par = info->par;
200 return par->vid_ops->blank_display(info, blank_mode);
203 static int __init gx1fb_map_video_memory(struct fb_info *info, struct pci_dev *dev)
205 struct geodefb_par *par = info->par;
210 gx_base = gx1_gx_base();
214 ret = pci_enable_device(dev);
218 ret = pci_request_region(dev, 0, "gx1fb (video)");
221 par->vid_regs = ioremap(pci_resource_start(dev, 0),
222 pci_resource_len(dev, 0));
226 if (!request_mem_region(gx_base + 0x8300, 0x100, "gx1fb (display controller)"))
228 par->dc_regs = ioremap(gx_base + 0x8300, 0x100);
232 if ((fb_len = gx1_frame_buffer_size()) < 0)
234 info->fix.smem_start = gx_base + 0x800000;
235 info->fix.smem_len = fb_len;
236 info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
237 if (!info->screen_base)
240 dev_info(&dev->dev, "%d Kibyte of video memory at 0x%lx\n",
241 info->fix.smem_len / 1024, info->fix.smem_start);
246 static int parse_panel_option(struct fb_info *info)
248 struct geodefb_par *par = info->par;
250 if (strcmp(panel_option, "") != 0) {
253 x = simple_strtol(panel_option, &s, 10);
256 y = simple_strtol(s + 1, NULL, 10);
265 static struct fb_ops gx1fb_ops = {
266 .owner = THIS_MODULE,
267 .fb_check_var = gx1fb_check_var,
268 .fb_set_par = gx1fb_set_par,
269 .fb_setcolreg = gx1fb_setcolreg,
270 .fb_blank = gx1fb_blank,
271 /* No HW acceleration for now. */
272 .fb_fillrect = cfb_fillrect,
273 .fb_copyarea = cfb_copyarea,
274 .fb_imageblit = cfb_imageblit,
277 static struct fb_info * __init gx1fb_init_fbinfo(struct device *dev)
279 struct geodefb_par *par;
280 struct fb_info *info;
282 /* Alloc enough space for the pseudo palette. */
283 info = framebuffer_alloc(sizeof(struct geodefb_par) + sizeof(u32) * 16, dev);
289 strcpy(info->fix.id, "GX1");
291 info->fix.type = FB_TYPE_PACKED_PIXELS;
292 info->fix.type_aux = 0;
293 info->fix.xpanstep = 0;
294 info->fix.ypanstep = 0;
295 info->fix.ywrapstep = 0;
296 info->fix.accel = FB_ACCEL_NONE;
298 info->var.nonstd = 0;
299 info->var.activate = FB_ACTIVATE_NOW;
300 info->var.height = -1;
301 info->var.width = -1;
302 info->var.accel_flags = 0;
303 info->var.vmode = FB_VMODE_NONINTERLACED;
305 info->fbops = &gx1fb_ops;
306 info->flags = FBINFO_DEFAULT;
309 info->pseudo_palette = (void *)par + sizeof(struct geodefb_par);
311 info->var.grayscale = 0;
313 /* CRT and panel options */
314 par->enable_crt = crt_option;
315 if (parse_panel_option(info) < 0)
316 printk(KERN_WARNING "gx1fb: invalid 'panel' option -- disabling flat panel\n");
318 par->enable_crt = 1; /* fall back to CRT if no panel is specified */
323 static int __init gx1fb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
325 struct geodefb_par *par;
326 struct fb_info *info;
329 info = gx1fb_init_fbinfo(&pdev->dev);
334 /* GX1 display controller and CS5530 video device */
335 par->dc_ops = &gx1_dc_ops;
336 par->vid_ops = &cs5530_vid_ops;
338 if ((ret = gx1fb_map_video_memory(info, pdev)) < 0) {
339 dev_err(&pdev->dev, "failed to map frame buffer or controller registers\n");
343 ret = fb_find_mode(&info->var, info, mode_option,
344 gx1_modedb, ARRAY_SIZE(gx1_modedb), NULL, 16);
345 if (ret == 0 || ret == 4) {
346 dev_err(&pdev->dev, "could not find valid video mode\n");
351 /* Clear the frame buffer of garbage. */
352 memset_io(info->screen_base, 0, info->fix.smem_len);
354 gx1fb_check_var(&info->var, info);
357 if (register_framebuffer(info) < 0) {
361 pci_set_drvdata(pdev, info);
362 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node, info->fix.id);
366 if (info->screen_base) {
367 iounmap(info->screen_base);
368 pci_release_region(pdev, 0);
371 iounmap(par->vid_regs);
372 pci_release_region(pdev, 1);
375 iounmap(par->dc_regs);
376 release_mem_region(gx1_gx_base() + 0x8300, 0x100);
380 framebuffer_release(info);
384 static void gx1fb_remove(struct pci_dev *pdev)
386 struct fb_info *info = pci_get_drvdata(pdev);
387 struct geodefb_par *par = info->par;
389 unregister_framebuffer(info);
391 iounmap((void __iomem *)info->screen_base);
392 pci_release_region(pdev, 0);
394 iounmap(par->vid_regs);
395 pci_release_region(pdev, 1);
397 iounmap(par->dc_regs);
398 release_mem_region(gx1_gx_base() + 0x8300, 0x100);
400 pci_set_drvdata(pdev, NULL);
402 framebuffer_release(info);
405 static struct pci_device_id gx1fb_id_table[] = {
406 { PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_VIDEO,
407 PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY << 16,
412 MODULE_DEVICE_TABLE(pci, gx1fb_id_table);
414 static struct pci_driver gx1fb_driver = {
416 .id_table = gx1fb_id_table,
417 .probe = gx1fb_probe,
418 .remove = gx1fb_remove,
421 static int __init gx1fb_init(void)
424 if (fb_get_options("gx1fb", NULL))
427 return pci_register_driver(&gx1fb_driver);
430 static void __exit gx1fb_cleanup(void)
432 pci_unregister_driver(&gx1fb_driver);
435 module_init(gx1fb_init);
436 module_exit(gx1fb_cleanup);
438 module_param_string(mode, mode_option, sizeof(mode_option), 0444);
439 MODULE_PARM_DESC(mode, "video mode (<x>x<y>[-<bpp>][@<refr>])");
441 module_param_named(crt, crt_option, int, 0444);
442 MODULE_PARM_DESC(crt, "enable CRT output. 0 = off, 1 = on (default)");
444 module_param_string(panel, panel_option, sizeof(panel_option), 0444);
445 MODULE_PARM_DESC(panel, "size of attached flat panel (<x>x<y>)");
447 MODULE_DESCRIPTION("framebuffer driver for the AMD Geode GX1");
448 MODULE_LICENSE("GPL");