2 * Geode GX framebuffer driver.
4 * Copyright (C) 2006 Arcom Control Systems Ltd.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
12 * This driver assumes that the BIOS has created a virtual PCI device header
13 * for the video device. The PCI header is assumed to contain the following
16 * BAR0 - framebuffer memory
17 * BAR1 - graphics processor registers
18 * BAR2 - display controller registers
19 * BAR3 - video processor and flat panel control registers.
21 * 16 MiB of framebuffer memory is assumed to be available.
23 #include <linux/module.h>
24 #include <linux/kernel.h>
25 #include <linux/errno.h>
26 #include <linux/string.h>
28 #include <linux/slab.h>
29 #include <linux/delay.h>
31 #include <linux/init.h>
32 #include <linux/pci.h>
35 #include "display_gx.h"
38 static char mode_option
[32] = "640x480-16@60";
40 /* Modes relevant to the GX (taken from modedb.c) */
41 static const struct fb_videomode __initdata gx_modedb
[] = {
43 { NULL
, 60, 640, 480, 39682, 48, 16, 33, 10, 96, 2,
44 0, FB_VMODE_NONINTERLACED
, FB_MODE_IS_VESA
},
46 { NULL
, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
47 0, FB_VMODE_NONINTERLACED
, FB_MODE_IS_VESA
},
49 { NULL
, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
50 0, FB_VMODE_NONINTERLACED
, FB_MODE_IS_VESA
},
52 { NULL
, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
53 FB_SYNC_HOR_HIGH_ACT
| FB_SYNC_VERT_HIGH_ACT
,
54 FB_VMODE_NONINTERLACED
, FB_MODE_IS_VESA
},
56 { NULL
, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
57 FB_SYNC_HOR_HIGH_ACT
| FB_SYNC_VERT_HIGH_ACT
,
58 FB_VMODE_NONINTERLACED
, FB_MODE_IS_VESA
},
60 { NULL
, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
61 FB_SYNC_HOR_HIGH_ACT
| FB_SYNC_VERT_HIGH_ACT
,
62 FB_VMODE_NONINTERLACED
, FB_MODE_IS_VESA
},
63 /* 1024x768-60 VESA */
64 { NULL
, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
65 0, FB_VMODE_NONINTERLACED
, FB_MODE_IS_VESA
},
66 /* 1024x768-75 VESA */
67 { NULL
, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
68 FB_SYNC_HOR_HIGH_ACT
| FB_SYNC_VERT_HIGH_ACT
,
69 FB_VMODE_NONINTERLACED
, FB_MODE_IS_VESA
},
70 /* 1024x768-85 VESA */
71 { NULL
, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
72 FB_SYNC_HOR_HIGH_ACT
| FB_SYNC_VERT_HIGH_ACT
,
73 FB_VMODE_NONINTERLACED
, FB_MODE_IS_VESA
},
74 /* 1280x960-60 VESA */
75 { NULL
, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
76 FB_SYNC_HOR_HIGH_ACT
| FB_SYNC_VERT_HIGH_ACT
,
77 FB_VMODE_NONINTERLACED
, FB_MODE_IS_VESA
},
78 /* 1280x960-85 VESA */
79 { NULL
, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
80 FB_SYNC_HOR_HIGH_ACT
| FB_SYNC_VERT_HIGH_ACT
,
81 FB_VMODE_NONINTERLACED
, FB_MODE_IS_VESA
},
82 /* 1280x1024-60 VESA */
83 { NULL
, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
84 FB_SYNC_HOR_HIGH_ACT
| FB_SYNC_VERT_HIGH_ACT
,
85 FB_VMODE_NONINTERLACED
, FB_MODE_IS_VESA
},
86 /* 1280x1024-75 VESA */
87 { NULL
, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
88 FB_SYNC_HOR_HIGH_ACT
| FB_SYNC_VERT_HIGH_ACT
,
89 FB_VMODE_NONINTERLACED
, FB_MODE_IS_VESA
},
90 /* 1280x1024-85 VESA */
91 { NULL
, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
92 FB_SYNC_HOR_HIGH_ACT
| FB_SYNC_VERT_HIGH_ACT
,
93 FB_VMODE_NONINTERLACED
, FB_MODE_IS_VESA
},
94 /* 1600x1200-60 VESA */
95 { NULL
, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
96 FB_SYNC_HOR_HIGH_ACT
| FB_SYNC_VERT_HIGH_ACT
,
97 FB_VMODE_NONINTERLACED
, FB_MODE_IS_VESA
},
98 /* 1600x1200-75 VESA */
99 { NULL
, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
100 FB_SYNC_HOR_HIGH_ACT
| FB_SYNC_VERT_HIGH_ACT
,
101 FB_VMODE_NONINTERLACED
, FB_MODE_IS_VESA
},
102 /* 1600x1200-85 VESA */
103 { NULL
, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3,
104 FB_SYNC_HOR_HIGH_ACT
| FB_SYNC_VERT_HIGH_ACT
,
105 FB_VMODE_NONINTERLACED
, FB_MODE_IS_VESA
},
108 static int gxfb_check_var(struct fb_var_screeninfo
*var
, struct fb_info
*info
)
110 if (var
->xres
> 1600 || var
->yres
> 1200)
112 if ((var
->xres
> 1280 || var
->yres
> 1024) && var
->bits_per_pixel
> 16)
115 if (var
->bits_per_pixel
== 32) {
116 var
->red
.offset
= 16; var
->red
.length
= 8;
117 var
->green
.offset
= 8; var
->green
.length
= 8;
118 var
->blue
.offset
= 0; var
->blue
.length
= 8;
119 } else if (var
->bits_per_pixel
== 16) {
120 var
->red
.offset
= 11; var
->red
.length
= 5;
121 var
->green
.offset
= 5; var
->green
.length
= 6;
122 var
->blue
.offset
= 0; var
->blue
.length
= 5;
123 } else if (var
->bits_per_pixel
== 8) {
124 var
->red
.offset
= 0; var
->red
.length
= 8;
125 var
->green
.offset
= 0; var
->green
.length
= 8;
126 var
->blue
.offset
= 0; var
->blue
.length
= 8;
129 var
->transp
.offset
= 0; var
->transp
.length
= 0;
131 /* Enough video memory? */
132 if (gx_line_delta(var
->xres
, var
->bits_per_pixel
) * var
->yres
> info
->fix
.smem_len
)
135 /* FIXME: Check timing parameters here? */
140 static int gxfb_set_par(struct fb_info
*info
)
142 struct geodefb_par
*par
= info
->par
;
144 if (info
->var
.bits_per_pixel
> 8) {
145 info
->fix
.visual
= FB_VISUAL_TRUECOLOR
;
146 fb_dealloc_cmap(&info
->cmap
);
148 info
->fix
.visual
= FB_VISUAL_PSEUDOCOLOR
;
149 fb_alloc_cmap(&info
->cmap
, 1<<info
->var
.bits_per_pixel
, 0);
152 info
->fix
.line_length
= gx_line_delta(info
->var
.xres
, info
->var
.bits_per_pixel
);
154 par
->dc_ops
->set_mode(info
);
159 static inline u_int
chan_to_field(u_int chan
, struct fb_bitfield
*bf
)
162 chan
>>= 16 - bf
->length
;
163 return chan
<< bf
->offset
;
166 static int gxfb_setcolreg(unsigned regno
, unsigned red
, unsigned green
,
167 unsigned blue
, unsigned transp
,
168 struct fb_info
*info
)
170 struct geodefb_par
*par
= info
->par
;
172 if (info
->var
.grayscale
) {
173 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
174 red
= green
= blue
= (red
* 77 + green
* 151 + blue
* 28) >> 8;
177 /* Truecolor has hardware independent palette */
178 if (info
->fix
.visual
== FB_VISUAL_TRUECOLOR
) {
179 u32
*pal
= info
->pseudo_palette
;
185 v
= chan_to_field(red
, &info
->var
.red
);
186 v
|= chan_to_field(green
, &info
->var
.green
);
187 v
|= chan_to_field(blue
, &info
->var
.blue
);
194 par
->dc_ops
->set_palette_reg(info
, regno
, red
, green
, blue
);
200 static int gxfb_blank(int blank_mode
, struct fb_info
*info
)
202 struct geodefb_par
*par
= info
->par
;
204 return par
->vid_ops
->blank_display(info
, blank_mode
);
207 static int __init
gxfb_map_video_memory(struct fb_info
*info
, struct pci_dev
*dev
)
209 struct geodefb_par
*par
= info
->par
;
213 ret
= pci_enable_device(dev
);
217 ret
= pci_request_region(dev
, 3, "gxfb (video processor)");
220 par
->vid_regs
= ioremap(pci_resource_start(dev
, 3),
221 pci_resource_len(dev
, 3));
225 ret
= pci_request_region(dev
, 2, "gxfb (display controller)");
228 par
->dc_regs
= ioremap(pci_resource_start(dev
, 2), pci_resource_len(dev
, 2));
232 ret
= pci_request_region(dev
, 0, "gxfb (framebuffer)");
235 if ((fb_len
= gx_frame_buffer_size()) < 0)
237 info
->fix
.smem_start
= pci_resource_start(dev
, 0);
238 info
->fix
.smem_len
= fb_len
;
239 info
->screen_base
= ioremap(info
->fix
.smem_start
, info
->fix
.smem_len
);
240 if (!info
->screen_base
)
243 dev_info(&dev
->dev
, "%d Kibyte of video memory at 0x%lx\n",
244 info
->fix
.smem_len
/ 1024, info
->fix
.smem_start
);
249 static struct fb_ops gxfb_ops
= {
250 .owner
= THIS_MODULE
,
251 .fb_check_var
= gxfb_check_var
,
252 .fb_set_par
= gxfb_set_par
,
253 .fb_setcolreg
= gxfb_setcolreg
,
254 .fb_blank
= gxfb_blank
,
255 /* No HW acceleration for now. */
256 .fb_fillrect
= cfb_fillrect
,
257 .fb_copyarea
= cfb_copyarea
,
258 .fb_imageblit
= cfb_imageblit
,
261 static struct fb_info
* __init
gxfb_init_fbinfo(struct device
*dev
)
263 struct geodefb_par
*par
;
264 struct fb_info
*info
;
266 /* Alloc enough space for the pseudo palette. */
267 info
= framebuffer_alloc(sizeof(struct geodefb_par
) + sizeof(u32
) * 16, dev
);
273 strcpy(info
->fix
.id
, "Geode GX");
275 info
->fix
.type
= FB_TYPE_PACKED_PIXELS
;
276 info
->fix
.type_aux
= 0;
277 info
->fix
.xpanstep
= 0;
278 info
->fix
.ypanstep
= 0;
279 info
->fix
.ywrapstep
= 0;
280 info
->fix
.accel
= FB_ACCEL_NONE
;
282 info
->var
.nonstd
= 0;
283 info
->var
.activate
= FB_ACTIVATE_NOW
;
284 info
->var
.height
= -1;
285 info
->var
.width
= -1;
286 info
->var
.accel_flags
= 0;
287 info
->var
.vmode
= FB_VMODE_NONINTERLACED
;
289 info
->fbops
= &gxfb_ops
;
290 info
->flags
= FBINFO_DEFAULT
;
293 info
->pseudo_palette
= (void *)par
+ sizeof(struct geodefb_par
);
295 info
->var
.grayscale
= 0;
300 static int __init
gxfb_probe(struct pci_dev
*pdev
, const struct pci_device_id
*id
)
302 struct geodefb_par
*par
;
303 struct fb_info
*info
;
306 info
= gxfb_init_fbinfo(&pdev
->dev
);
311 /* GX display controller and GX video device. */
312 par
->dc_ops
= &gx_dc_ops
;
313 par
->vid_ops
= &gx_vid_ops
;
315 if ((ret
= gxfb_map_video_memory(info
, pdev
)) < 0) {
316 dev_err(&pdev
->dev
, "failed to map frame buffer or controller registers\n");
320 ret
= fb_find_mode(&info
->var
, info
, mode_option
,
321 gx_modedb
, ARRAY_SIZE(gx_modedb
), NULL
, 16);
322 if (ret
== 0 || ret
== 4) {
323 dev_err(&pdev
->dev
, "could not find valid video mode\n");
328 /* Clear the frame buffer of garbage. */
329 memset_io(info
->screen_base
, 0, info
->fix
.smem_len
);
331 gxfb_check_var(&info
->var
, info
);
334 if (register_framebuffer(info
) < 0) {
338 pci_set_drvdata(pdev
, info
);
339 printk(KERN_INFO
"fb%d: %s frame buffer device\n", info
->node
, info
->fix
.id
);
343 if (info
->screen_base
) {
344 iounmap(info
->screen_base
);
345 pci_release_region(pdev
, 0);
348 iounmap(par
->vid_regs
);
349 pci_release_region(pdev
, 3);
352 iounmap(par
->dc_regs
);
353 pci_release_region(pdev
, 2);
357 framebuffer_release(info
);
361 static void gxfb_remove(struct pci_dev
*pdev
)
363 struct fb_info
*info
= pci_get_drvdata(pdev
);
364 struct geodefb_par
*par
= info
->par
;
366 unregister_framebuffer(info
);
368 iounmap((void __iomem
*)info
->screen_base
);
369 pci_release_region(pdev
, 0);
371 iounmap(par
->vid_regs
);
372 pci_release_region(pdev
, 3);
374 iounmap(par
->dc_regs
);
375 pci_release_region(pdev
, 2);
377 pci_set_drvdata(pdev
, NULL
);
379 framebuffer_release(info
);
382 static struct pci_device_id gxfb_id_table
[] = {
383 { PCI_VENDOR_ID_NS
, PCI_DEVICE_ID_NS_CS5535_VIDEO
,
384 PCI_ANY_ID
, PCI_ANY_ID
, PCI_BASE_CLASS_DISPLAY
<< 16,
389 MODULE_DEVICE_TABLE(pci
, gxfb_id_table
);
391 static struct pci_driver gxfb_driver
= {
393 .id_table
= gxfb_id_table
,
395 .remove
= gxfb_remove
,
398 static int __init
gxfb_init(void)
401 if (fb_get_options("gxfb", NULL
))
404 return pci_register_driver(&gxfb_driver
);
407 static void __exit
gxfb_cleanup(void)
409 pci_unregister_driver(&gxfb_driver
);
412 module_init(gxfb_init
);
413 module_exit(gxfb_cleanup
);
415 module_param_string(mode
, mode_option
, sizeof(mode_option
), 0444);
416 MODULE_PARM_DESC(mode
, "video mode (<x>x<y>[-<bpp>][@<refr>])");
418 MODULE_DESCRIPTION("Framebuffer driver for the AMD Geode GX");
419 MODULE_LICENSE("GPL");