1 /* drivers/video/pvr2fb.c
3 * Frame buffer and fbcon support for the NEC PowerVR2 found within the Sega
6 * Copyright (c) 2001 M. R. Brown <mrbrown@0xd6.org>
7 * Copyright (c) 2001, 2002, 2003, 2004, 2005 Paul Mundt <lethal@linux-sh.org>
9 * This file is part of the LinuxDC project (linuxdc.sourceforge.net).
14 * This driver is mostly based on the excellent amifb and vfb sources. It uses
15 * an odd scheme for converting hardware values to/from framebuffer values,
16 * here are some hacked-up formulas:
18 * The Dreamcast has screen offsets from each side of its four borders and
19 * the start offsets of the display window. I used these values to calculate
20 * 'pseudo' values (think of them as placeholders) for the fb video mode, so
21 * that when it came time to convert these values back into their hardware
22 * values, I could just add mode- specific offsets to get the correct mode
25 * left_margin = diwstart_h - borderstart_h;
26 * right_margin = borderstop_h - (diwstart_h + xres);
27 * upper_margin = diwstart_v - borderstart_v;
28 * lower_margin = borderstop_v - (diwstart_h + yres);
30 * hsync_len = borderstart_h + (hsync_total - borderstop_h);
31 * vsync_len = borderstart_v + (vsync_total - borderstop_v);
33 * Then, when it's time to convert back to hardware settings, the only
34 * constants are the borderstart_* offsets, all other values are derived from
38 * borderstart_h = 116;
41 * borderstop_h = borderstart_h + hsync_total - hsync_len;
43 * diwstart_v = borderstart_v - upper_margin;
45 * However, in the current implementation, the borderstart values haven't had
46 * the benefit of being fully researched, so some modes may be broken.
51 #include <linux/module.h>
52 #include <linux/kernel.h>
53 #include <linux/errno.h>
54 #include <linux/string.h>
56 #include <linux/slab.h>
57 #include <linux/delay.h>
58 #include <linux/interrupt.h>
60 #include <linux/init.h>
61 #include <linux/pci.h>
63 #ifdef CONFIG_SH_DREAMCAST
64 #include <asm/machvec.h>
65 #include <asm/mach/sysasic.h>
69 #include <linux/pagemap.h>
70 #include <asm/mach/dma.h>
74 #ifdef CONFIG_SH_STORE_QUEUES
75 #include <asm/uaccess.h>
76 #include <asm/cpu/sq.h>
79 #ifndef PCI_DEVICE_ID_NEC_NEON250
80 # define PCI_DEVICE_ID_NEC_NEON250 0x0067
83 /* 2D video registers */
84 #define DISP_BASE par->mmio_base
85 #define DISP_BRDRCOLR (DISP_BASE + 0x40)
86 #define DISP_DIWMODE (DISP_BASE + 0x44)
87 #define DISP_DIWADDRL (DISP_BASE + 0x50)
88 #define DISP_DIWADDRS (DISP_BASE + 0x54)
89 #define DISP_DIWSIZE (DISP_BASE + 0x5c)
90 #define DISP_SYNCCONF (DISP_BASE + 0xd0)
91 #define DISP_BRDRHORZ (DISP_BASE + 0xd4)
92 #define DISP_SYNCSIZE (DISP_BASE + 0xd8)
93 #define DISP_BRDRVERT (DISP_BASE + 0xdc)
94 #define DISP_DIWCONF (DISP_BASE + 0xe8)
95 #define DISP_DIWHSTRT (DISP_BASE + 0xec)
96 #define DISP_DIWVSTRT (DISP_BASE + 0xf0)
98 /* Pixel clocks, one for TV output, doubled for VGA output */
100 #define VGA_CLK 37119
102 /* This is for 60Hz - the VTOTAL is doubled for interlaced modes */
103 #define PAL_HTOTAL 863
104 #define PAL_VTOTAL 312
105 #define NTSC_HTOTAL 857
106 #define NTSC_VTOTAL 262
108 /* Supported cable types */
109 enum { CT_VGA
, CT_NONE
, CT_RGB
, CT_COMPOSITE
};
111 /* Supported video output types */
112 enum { VO_PAL
, VO_NTSC
, VO_VGA
};
114 /* Supported palette types */
115 enum { PAL_ARGB1555
, PAL_RGB565
, PAL_ARGB4444
, PAL_ARGB8888
};
117 struct pvr2_params
{ unsigned int val
; char *name
; };
118 static struct pvr2_params cables
[] __devinitdata
= {
119 { CT_VGA
, "VGA" }, { CT_RGB
, "RGB" }, { CT_COMPOSITE
, "COMPOSITE" },
122 static struct pvr2_params outputs
[] __devinitdata
= {
123 { VO_PAL
, "PAL" }, { VO_NTSC
, "NTSC" }, { VO_VGA
, "VGA" },
127 * This describes the current video mode
130 static struct pvr2fb_par
{
131 unsigned int hsync_total
; /* Clocks/line */
132 unsigned int vsync_total
; /* Lines/field */
133 unsigned int borderstart_h
;
134 unsigned int borderstop_h
;
135 unsigned int borderstart_v
;
136 unsigned int borderstop_v
;
137 unsigned int diwstart_h
; /* Horizontal offset of the display field */
138 unsigned int diwstart_v
; /* Vertical offset of the display field, for
139 interlaced modes, this is the long field */
140 unsigned long disp_start
; /* Address of image within VRAM */
141 unsigned char is_interlaced
; /* Is the display interlaced? */
142 unsigned char is_doublescan
; /* Are scanlines output twice? (doublescan) */
143 unsigned char is_lowres
; /* Is horizontal pixel-doubling enabled? */
145 unsigned long mmio_base
; /* MMIO base */
148 static struct fb_info
*fb_info
;
150 static struct fb_fix_screeninfo pvr2_fix __devinitdata
= {
151 .id
= "NEC PowerVR2",
152 .type
= FB_TYPE_PACKED_PIXELS
,
153 .visual
= FB_VISUAL_TRUECOLOR
,
156 .accel
= FB_ACCEL_NONE
,
159 static struct fb_var_screeninfo pvr2_var __devinitdata
= {
166 .green
= { 5, 6, 0 },
168 .activate
= FB_ACTIVATE_NOW
,
171 .vmode
= FB_VMODE_NONINTERLACED
,
174 static int cable_type
= CT_VGA
;
175 static int video_output
= VO_VGA
;
177 static int nopan
= 0;
178 static int nowrap
= 1;
181 * We do all updating, blanking, etc. during the vertical retrace period
183 static unsigned int do_vmode_full
= 0; /* Change the video mode */
184 static unsigned int do_vmode_pan
= 0; /* Update the video mode */
185 static short do_blank
= 0; /* (Un)Blank the screen */
187 static unsigned int is_blanked
= 0; /* Is the screen blanked? */
189 #ifdef CONFIG_SH_STORE_QUEUES
190 static unsigned long pvr2fb_map
;
194 static unsigned int shdma
= PVR2_CASCADE_CHAN
;
195 static unsigned int pvr2dma
= ONCHIP_NR_DMA_CHANNELS
;
198 static int pvr2fb_setcolreg(unsigned int regno
, unsigned int red
, unsigned int green
, unsigned int blue
,
199 unsigned int transp
, struct fb_info
*info
);
200 static int pvr2fb_blank(int blank
, struct fb_info
*info
);
201 static unsigned long get_line_length(int xres_virtual
, int bpp
);
202 static void set_color_bitfields(struct fb_var_screeninfo
*var
);
203 static int pvr2fb_check_var(struct fb_var_screeninfo
*var
, struct fb_info
*info
);
204 static int pvr2fb_set_par(struct fb_info
*info
);
205 static void pvr2_update_display(struct fb_info
*info
);
206 static void pvr2_init_display(struct fb_info
*info
);
207 static void pvr2_do_blank(void);
208 static irqreturn_t
pvr2fb_interrupt(int irq
, void *dev_id
);
209 static int pvr2_init_cable(void);
210 static int pvr2_get_param(const struct pvr2_params
*p
, const char *s
,
213 static ssize_t
pvr2fb_write(struct fb_info
*info
, const char *buf
,
214 size_t count
, loff_t
*ppos
);
217 static struct fb_ops pvr2fb_ops
= {
218 .owner
= THIS_MODULE
,
219 .fb_setcolreg
= pvr2fb_setcolreg
,
220 .fb_blank
= pvr2fb_blank
,
221 .fb_check_var
= pvr2fb_check_var
,
222 .fb_set_par
= pvr2fb_set_par
,
224 .fb_write
= pvr2fb_write
,
226 .fb_fillrect
= cfb_fillrect
,
227 .fb_copyarea
= cfb_copyarea
,
228 .fb_imageblit
= cfb_imageblit
,
231 static struct fb_videomode pvr2_modedb
[] __devinitdata
= {
233 * Broadcast video modes (PAL and NTSC). I'm unfamiliar with
234 * PAL-M and PAL-N, but from what I've read both modes parallel PAL and
235 * NTSC, so it shouldn't be a problem (I hope).
239 /* 640x480 @ 60Hz interlaced (NTSC) */
240 "ntsc_640x480i", 60, 640, 480, TV_CLK
, 38, 33, 0, 18, 146, 26,
241 FB_SYNC_BROADCAST
, FB_VMODE_INTERLACED
| FB_VMODE_YWRAP
243 /* 640x240 @ 60Hz (NTSC) */
244 /* XXX: Broken! Don't use... */
245 "ntsc_640x240", 60, 640, 240, TV_CLK
, 38, 33, 0, 0, 146, 22,
246 FB_SYNC_BROADCAST
, FB_VMODE_YWRAP
248 /* 640x480 @ 60hz (VGA) */
249 "vga_640x480", 60, 640, 480, VGA_CLK
, 38, 33, 0, 18, 146, 26,
254 #define NUM_TOTAL_MODES ARRAY_SIZE(pvr2_modedb)
256 #define DEFMODE_NTSC 0
257 #define DEFMODE_PAL 0
258 #define DEFMODE_VGA 2
260 static int defmode
= DEFMODE_NTSC
;
261 static char *mode_option __devinitdata
= NULL
;
263 static inline void pvr2fb_set_pal_type(unsigned int type
)
265 struct pvr2fb_par
*par
= (struct pvr2fb_par
*)fb_info
->par
;
267 fb_writel(type
, par
->mmio_base
+ 0x108);
270 static inline void pvr2fb_set_pal_entry(struct pvr2fb_par
*par
,
274 fb_writel(val
, par
->mmio_base
+ 0x1000 + (4 * regno
));
277 static int pvr2fb_blank(int blank
, struct fb_info
*info
)
279 do_blank
= blank
? blank
: -1;
283 static inline unsigned long get_line_length(int xres_virtual
, int bpp
)
285 return (unsigned long)((((xres_virtual
*bpp
)+31)&~31) >> 3);
288 static void set_color_bitfields(struct fb_var_screeninfo
*var
)
290 switch (var
->bits_per_pixel
) {
291 case 16: /* RGB 565 */
292 pvr2fb_set_pal_type(PAL_RGB565
);
293 var
->red
.offset
= 11; var
->red
.length
= 5;
294 var
->green
.offset
= 5; var
->green
.length
= 6;
295 var
->blue
.offset
= 0; var
->blue
.length
= 5;
296 var
->transp
.offset
= 0; var
->transp
.length
= 0;
298 case 24: /* RGB 888 */
299 var
->red
.offset
= 16; var
->red
.length
= 8;
300 var
->green
.offset
= 8; var
->green
.length
= 8;
301 var
->blue
.offset
= 0; var
->blue
.length
= 8;
302 var
->transp
.offset
= 0; var
->transp
.length
= 0;
304 case 32: /* ARGB 8888 */
305 pvr2fb_set_pal_type(PAL_ARGB8888
);
306 var
->red
.offset
= 16; var
->red
.length
= 8;
307 var
->green
.offset
= 8; var
->green
.length
= 8;
308 var
->blue
.offset
= 0; var
->blue
.length
= 8;
309 var
->transp
.offset
= 24; var
->transp
.length
= 8;
314 static int pvr2fb_setcolreg(unsigned int regno
, unsigned int red
,
315 unsigned int green
, unsigned int blue
,
316 unsigned int transp
, struct fb_info
*info
)
318 struct pvr2fb_par
*par
= (struct pvr2fb_par
*)info
->par
;
321 if (regno
> info
->cmap
.len
)
325 * We only support the hardware palette for 16 and 32bpp. It's also
326 * expected that the palette format has been set by the time we get
327 * here, so we don't waste time setting it again.
329 switch (info
->var
.bits_per_pixel
) {
330 case 16: /* RGB 565 */
331 tmp
= (red
& 0xf800) |
332 ((green
& 0xfc00) >> 5) |
333 ((blue
& 0xf800) >> 11);
335 pvr2fb_set_pal_entry(par
, regno
, tmp
);
337 case 24: /* RGB 888 */
338 red
>>= 8; green
>>= 8; blue
>>= 8;
339 tmp
= (red
<< 16) | (green
<< 8) | blue
;
341 case 32: /* ARGB 8888 */
342 red
>>= 8; green
>>= 8; blue
>>= 8;
343 tmp
= (transp
<< 24) | (red
<< 16) | (green
<< 8) | blue
;
345 pvr2fb_set_pal_entry(par
, regno
, tmp
);
348 pr_debug("Invalid bit depth %d?!?\n", info
->var
.bits_per_pixel
);
353 ((u32
*)(info
->pseudo_palette
))[regno
] = tmp
;
358 static int pvr2fb_set_par(struct fb_info
*info
)
360 struct pvr2fb_par
*par
= (struct pvr2fb_par
*)info
->par
;
361 struct fb_var_screeninfo
*var
= &info
->var
;
362 unsigned long line_length
;
366 * XXX: It's possible that a user could use a VGA box, change the cable
367 * type in hardware (i.e. switch from VGA<->composite), then change
368 * modes (i.e. switching to another VT). If that happens we should
369 * automagically change the output format to cope, but currently I
370 * don't have a VGA box to make sure this works properly.
372 cable_type
= pvr2_init_cable();
373 if (cable_type
== CT_VGA
&& video_output
!= VO_VGA
)
374 video_output
= VO_VGA
;
376 var
->vmode
&= FB_VMODE_MASK
;
377 if (var
->vmode
& FB_VMODE_INTERLACED
&& video_output
!= VO_VGA
)
378 par
->is_interlaced
= 1;
380 * XXX: Need to be more creative with this (i.e. allow doublecan for
383 if (var
->vmode
& FB_VMODE_DOUBLE
&& video_output
== VO_VGA
)
384 par
->is_doublescan
= 1;
386 par
->hsync_total
= var
->left_margin
+ var
->xres
+ var
->right_margin
+
388 par
->vsync_total
= var
->upper_margin
+ var
->yres
+ var
->lower_margin
+
391 if (var
->sync
& FB_SYNC_BROADCAST
) {
392 vtotal
= par
->vsync_total
;
393 if (par
->is_interlaced
)
395 if (vtotal
> (PAL_VTOTAL
+ NTSC_VTOTAL
)/2) {
396 /* XXX: Check for start values here... */
397 /* XXX: Check hardware for PAL-compatibility */
398 par
->borderstart_h
= 116;
399 par
->borderstart_v
= 44;
401 /* NTSC video output */
402 par
->borderstart_h
= 126;
403 par
->borderstart_v
= 18;
407 /* XXX: What else needs to be checked? */
409 * XXX: We have a little freedom in VGA modes, what ranges
410 * should be here (i.e. hsync/vsync totals, etc.)?
412 par
->borderstart_h
= 126;
413 par
->borderstart_v
= 40;
416 /* Calculate the remainding offsets */
417 par
->diwstart_h
= par
->borderstart_h
+ var
->left_margin
;
418 par
->diwstart_v
= par
->borderstart_v
+ var
->upper_margin
;
419 par
->borderstop_h
= par
->diwstart_h
+ var
->xres
+
421 par
->borderstop_v
= par
->diwstart_v
+ var
->yres
+
424 if (!par
->is_interlaced
)
425 par
->borderstop_v
/= 2;
426 if (info
->var
.xres
< 640)
429 line_length
= get_line_length(var
->xres_virtual
, var
->bits_per_pixel
);
430 par
->disp_start
= info
->fix
.smem_start
+ (line_length
* var
->yoffset
) * line_length
;
431 info
->fix
.line_length
= line_length
;
435 static int pvr2fb_check_var(struct fb_var_screeninfo
*var
, struct fb_info
*info
)
437 struct pvr2fb_par
*par
= (struct pvr2fb_par
*)info
->par
;
438 unsigned int vtotal
, hsync_total
;
439 unsigned long line_length
;
441 if (var
->pixclock
!= TV_CLK
&& var
->pixclock
!= VGA_CLK
) {
442 pr_debug("Invalid pixclock value %d\n", var
->pixclock
);
450 if (var
->xres_virtual
< var
->xres
)
451 var
->xres_virtual
= var
->xres
;
452 if (var
->yres_virtual
< var
->yres
)
453 var
->yres_virtual
= var
->yres
;
455 if (var
->bits_per_pixel
<= 16)
456 var
->bits_per_pixel
= 16;
457 else if (var
->bits_per_pixel
<= 24)
458 var
->bits_per_pixel
= 24;
459 else if (var
->bits_per_pixel
<= 32)
460 var
->bits_per_pixel
= 32;
462 set_color_bitfields(var
);
464 if (var
->vmode
& FB_VMODE_YWRAP
) {
465 if (var
->xoffset
|| var
->yoffset
< 0 ||
466 var
->yoffset
>= var
->yres_virtual
) {
467 var
->xoffset
= var
->yoffset
= 0;
469 if (var
->xoffset
> var
->xres_virtual
- var
->xres
||
470 var
->yoffset
> var
->yres_virtual
- var
->yres
||
471 var
->xoffset
< 0 || var
->yoffset
< 0)
472 var
->xoffset
= var
->yoffset
= 0;
475 var
->xoffset
= var
->yoffset
= 0;
479 * XXX: Need to be more creative with this (i.e. allow doublecan for
482 if (var
->yres
< 480 && video_output
== VO_VGA
)
483 var
->vmode
|= FB_VMODE_DOUBLE
;
485 if (video_output
!= VO_VGA
) {
486 var
->sync
|= FB_SYNC_BROADCAST
;
487 var
->vmode
|= FB_VMODE_INTERLACED
;
489 var
->sync
&= ~FB_SYNC_BROADCAST
;
490 var
->vmode
&= ~FB_VMODE_INTERLACED
;
491 var
->vmode
|= pvr2_var
.vmode
;
494 if ((var
->activate
& FB_ACTIVATE_MASK
) != FB_ACTIVATE_TEST
) {
495 var
->right_margin
= par
->borderstop_h
-
496 (par
->diwstart_h
+ var
->xres
);
497 var
->left_margin
= par
->diwstart_h
- par
->borderstart_h
;
498 var
->hsync_len
= par
->borderstart_h
+
499 (par
->hsync_total
- par
->borderstop_h
);
501 var
->upper_margin
= par
->diwstart_v
- par
->borderstart_v
;
502 var
->lower_margin
= par
->borderstop_v
-
503 (par
->diwstart_v
+ var
->yres
);
504 var
->vsync_len
= par
->borderstop_v
+
505 (par
->vsync_total
- par
->borderstop_v
);
508 hsync_total
= var
->left_margin
+ var
->xres
+ var
->right_margin
+
510 vtotal
= var
->upper_margin
+ var
->yres
+ var
->lower_margin
+
513 if (var
->sync
& FB_SYNC_BROADCAST
) {
514 if (var
->vmode
& FB_VMODE_INTERLACED
)
516 if (vtotal
> (PAL_VTOTAL
+ NTSC_VTOTAL
)/2) {
517 /* PAL video output */
518 /* XXX: Should be using a range here ... ? */
519 if (hsync_total
!= PAL_HTOTAL
) {
520 pr_debug("invalid hsync total for PAL\n");
524 /* NTSC video output */
525 if (hsync_total
!= NTSC_HTOTAL
) {
526 pr_debug("invalid hsync total for NTSC\n");
532 /* Check memory sizes */
533 line_length
= get_line_length(var
->xres_virtual
, var
->bits_per_pixel
);
534 if (line_length
* var
->yres_virtual
> info
->fix
.smem_len
)
540 static void pvr2_update_display(struct fb_info
*info
)
542 struct pvr2fb_par
*par
= (struct pvr2fb_par
*) info
->par
;
543 struct fb_var_screeninfo
*var
= &info
->var
;
545 /* Update the start address of the display image */
546 fb_writel(par
->disp_start
, DISP_DIWADDRL
);
547 fb_writel(par
->disp_start
+
548 get_line_length(var
->xoffset
+var
->xres
, var
->bits_per_pixel
),
553 * Initialize the video mode. Currently, the 16bpp and 24bpp modes aren't
554 * very stable. It's probably due to the fact that a lot of the 2D video
555 * registers are still undocumented.
558 static void pvr2_init_display(struct fb_info
*info
)
560 struct pvr2fb_par
*par
= (struct pvr2fb_par
*) info
->par
;
561 struct fb_var_screeninfo
*var
= &info
->var
;
562 unsigned int diw_height
, diw_width
, diw_modulo
= 1;
563 unsigned int bytesperpixel
= var
->bits_per_pixel
>> 3;
565 /* hsync and vsync totals */
566 fb_writel((par
->vsync_total
<< 16) | par
->hsync_total
, DISP_SYNCSIZE
);
568 /* column height, modulo, row width */
569 /* since we're "panning" within vram, we need to offset things based
570 * on the offset from the virtual x start to our real gfx. */
571 if (video_output
!= VO_VGA
&& par
->is_interlaced
)
572 diw_modulo
+= info
->fix
.line_length
/ 4;
573 diw_height
= (par
->is_interlaced
? var
->yres
/ 2 : var
->yres
);
574 diw_width
= get_line_length(var
->xres
, var
->bits_per_pixel
) / 4;
575 fb_writel((diw_modulo
<< 20) | (--diw_height
<< 10) | --diw_width
,
578 /* display address, long and short fields */
579 fb_writel(par
->disp_start
, DISP_DIWADDRL
);
580 fb_writel(par
->disp_start
+
581 get_line_length(var
->xoffset
+var
->xres
, var
->bits_per_pixel
),
584 /* border horizontal, border vertical, border color */
585 fb_writel((par
->borderstart_h
<< 16) | par
->borderstop_h
, DISP_BRDRHORZ
);
586 fb_writel((par
->borderstart_v
<< 16) | par
->borderstop_v
, DISP_BRDRVERT
);
587 fb_writel(0, DISP_BRDRCOLR
);
589 /* display window start position */
590 fb_writel(par
->diwstart_h
, DISP_DIWHSTRT
);
591 fb_writel((par
->diwstart_v
<< 16) | par
->diwstart_v
, DISP_DIWVSTRT
);
594 fb_writel((0x16 << 16) | par
->is_lowres
, DISP_DIWCONF
);
596 /* clock doubler (for VGA), scan doubler, display enable */
597 fb_writel(((video_output
== VO_VGA
) << 23) |
598 (par
->is_doublescan
<< 1) | 1, DISP_DIWMODE
);
601 fb_writel(fb_readl(DISP_DIWMODE
) | (--bytesperpixel
<< 2), DISP_DIWMODE
);
603 /* video enable, color sync, interlace,
604 * hsync and vsync polarity (currently unused) */
605 fb_writel(0x100 | ((par
->is_interlaced
/*|4*/) << 4), DISP_SYNCCONF
);
608 /* Simulate blanking by making the border cover the entire screen */
610 #define BLANK_BIT (1<<3)
612 static void pvr2_do_blank(void)
614 struct pvr2fb_par
*par
= currentpar
;
615 unsigned long diwconf
;
617 diwconf
= fb_readl(DISP_DIWCONF
);
619 fb_writel(diwconf
| BLANK_BIT
, DISP_DIWCONF
);
621 fb_writel(diwconf
& ~BLANK_BIT
, DISP_DIWCONF
);
623 is_blanked
= do_blank
> 0 ? do_blank
: 0;
626 static irqreturn_t
pvr2fb_interrupt(int irq
, void *dev_id
)
628 struct fb_info
*info
= dev_id
;
630 if (do_vmode_pan
|| do_vmode_full
)
631 pvr2_update_display(info
);
633 pvr2_init_display(info
);
646 * Determine the cable type and initialize the cable output format. Don't do
647 * anything if the cable type has been overidden (via "cable:XX").
650 #define PCTRA 0xff80002c
651 #define PDTRA 0xff800030
652 #define VOUTC 0xa0702c00
654 static int pvr2_init_cable(void)
656 if (cable_type
< 0) {
657 fb_writel((fb_readl(PCTRA
) & 0xfff0ffff) | 0x000a0000,
659 cable_type
= (fb_readw(PDTRA
) >> 8) & 3;
662 /* Now select the output format (either composite or other) */
663 /* XXX: Save the previous val first, as this reg is also AICA
665 if (cable_type
== CT_COMPOSITE
)
666 fb_writel(3 << 8, VOUTC
);
674 static ssize_t
pvr2fb_write(struct fb_info
*info
, const char *buf
,
675 size_t count
, loff_t
*ppos
)
677 unsigned long dst
, start
, end
, len
;
678 unsigned int nr_pages
;
682 nr_pages
= (count
+ PAGE_SIZE
- 1) >> PAGE_SHIFT
;
684 pages
= kmalloc(nr_pages
* sizeof(struct page
*), GFP_KERNEL
);
688 down_read(¤t
->mm
->mmap_sem
);
689 ret
= get_user_pages(current
, current
->mm
, (unsigned long)buf
,
690 nr_pages
, WRITE
, 0, pages
, NULL
);
691 up_read(¤t
->mm
->mmap_sem
);
693 if (ret
< nr_pages
) {
699 dma_configure_channel(shdma
, 0x12c1);
701 dst
= (unsigned long)fb_info
->screen_base
+ *ppos
;
702 start
= (unsigned long)page_address(pages
[0]);
703 end
= (unsigned long)page_address(pages
[nr_pages
]);
704 len
= nr_pages
<< PAGE_SHIFT
;
706 /* Half-assed contig check */
707 if (start
+ len
== end
) {
708 /* As we do this in one shot, it's either all or nothing.. */
709 if ((*ppos
+ len
) > fb_info
->fix
.smem_len
) {
714 dma_write(shdma
, start
, 0, len
);
715 dma_write(pvr2dma
, 0, dst
, len
);
716 dma_wait_for_completion(pvr2dma
);
721 /* Not contiguous, writeout per-page instead.. */
722 for (i
= 0; i
< nr_pages
; i
++, dst
+= PAGE_SIZE
) {
723 if ((*ppos
+ (i
<< PAGE_SHIFT
)) > fb_info
->fix
.smem_len
) {
728 dma_write_page(shdma
, (unsigned long)page_address(pages
[i
]), 0);
729 dma_write_page(pvr2dma
, 0, dst
);
730 dma_wait_for_completion(pvr2dma
);
738 for (i
= 0; i
< nr_pages
; i
++)
739 page_cache_release(pages
[i
]);
745 #endif /* CONFIG_SH_DMA */
750 * Common init code for the PVR2 chips.
752 * This mostly takes care of the common aspects of the fb setup and
753 * registration. It's expected that the board-specific init code has
754 * already setup pvr2_fix with something meaningful at this point.
756 * Device info reporting is also done here, as well as picking a sane
757 * default from the modedb. For board-specific modelines, simply define
758 * a per-board modedb.
760 * Also worth noting is that the cable and video output types are likely
761 * always going to be VGA for the PCI-based PVR2 boards, but we leave this
762 * in for flexibility anyways. Who knows, maybe someone has tv-out on a
763 * PCI-based version of these things ;-)
765 static int __devinit
pvr2fb_common_init(void)
767 struct pvr2fb_par
*par
= currentpar
;
768 unsigned long modememused
, rev
;
770 fb_info
->screen_base
= ioremap_nocache(pvr2_fix
.smem_start
,
773 if (!fb_info
->screen_base
) {
774 printk(KERN_ERR
"pvr2fb: Failed to remap smem space\n");
778 par
->mmio_base
= (unsigned long)ioremap_nocache(pvr2_fix
.mmio_start
,
780 if (!par
->mmio_base
) {
781 printk(KERN_ERR
"pvr2fb: Failed to remap mmio space\n");
785 fb_memset(fb_info
->screen_base
, 0, pvr2_fix
.smem_len
);
787 pvr2_fix
.ypanstep
= nopan
? 0 : 1;
788 pvr2_fix
.ywrapstep
= nowrap
? 0 : 1;
790 fb_info
->fbops
= &pvr2fb_ops
;
791 fb_info
->fix
= pvr2_fix
;
792 fb_info
->par
= currentpar
;
793 fb_info
->pseudo_palette
= (void *)(fb_info
->par
+ 1);
794 fb_info
->flags
= FBINFO_DEFAULT
| FBINFO_HWACCEL_YPAN
;
796 if (video_output
== VO_VGA
)
797 defmode
= DEFMODE_VGA
;
800 mode_option
= "640x480@60";
802 if (!fb_find_mode(&fb_info
->var
, fb_info
, mode_option
, pvr2_modedb
,
803 NUM_TOTAL_MODES
, &pvr2_modedb
[defmode
], 16))
804 fb_info
->var
= pvr2_var
;
806 fb_alloc_cmap(&fb_info
->cmap
, 256, 0);
808 if (register_framebuffer(fb_info
) < 0)
811 modememused
= get_line_length(fb_info
->var
.xres_virtual
,
812 fb_info
->var
.bits_per_pixel
);
813 modememused
*= fb_info
->var
.yres_virtual
;
815 rev
= fb_readl(par
->mmio_base
+ 0x04);
817 printk("fb%d: %s (rev %ld.%ld) frame buffer device, using %ldk/%ldk of video memory\n",
818 fb_info
->node
, fb_info
->fix
.id
, (rev
>> 4) & 0x0f, rev
& 0x0f,
819 modememused
>> 10, (unsigned long)(fb_info
->fix
.smem_len
>> 10));
820 printk("fb%d: Mode %dx%d-%d pitch = %ld cable: %s video output: %s\n",
821 fb_info
->node
, fb_info
->var
.xres
, fb_info
->var
.yres
,
822 fb_info
->var
.bits_per_pixel
,
823 get_line_length(fb_info
->var
.xres
, fb_info
->var
.bits_per_pixel
),
824 (char *)pvr2_get_param(cables
, NULL
, cable_type
, 3),
825 (char *)pvr2_get_param(outputs
, NULL
, video_output
, 3));
827 #ifdef CONFIG_SH_STORE_QUEUES
828 printk(KERN_NOTICE
"fb%d: registering with SQ API\n", fb_info
->node
);
830 pvr2fb_map
= sq_remap(fb_info
->fix
.smem_start
, fb_info
->fix
.smem_len
,
831 fb_info
->fix
.id
, pgprot_val(PAGE_SHARED
));
833 printk(KERN_NOTICE
"fb%d: Mapped video memory to SQ addr 0x%lx\n",
834 fb_info
->node
, pvr2fb_map
);
840 if (fb_info
->screen_base
)
841 iounmap(fb_info
->screen_base
);
843 iounmap((void *)par
->mmio_base
);
848 #ifdef CONFIG_SH_DREAMCAST
849 static int __init
pvr2fb_dc_init(void)
851 if (!mach_is_dreamcast())
854 /* Make a guess at the monitor based on the attached cable */
855 if (pvr2_init_cable() == CT_VGA
) {
856 fb_info
->monspecs
.hfmin
= 30000;
857 fb_info
->monspecs
.hfmax
= 70000;
858 fb_info
->monspecs
.vfmin
= 60;
859 fb_info
->monspecs
.vfmax
= 60;
861 /* Not VGA, using a TV (taken from acornfb) */
862 fb_info
->monspecs
.hfmin
= 15469;
863 fb_info
->monspecs
.hfmax
= 15781;
864 fb_info
->monspecs
.vfmin
= 49;
865 fb_info
->monspecs
.vfmax
= 51;
869 * XXX: This needs to pull default video output via BIOS or other means
871 if (video_output
< 0) {
872 if (cable_type
== CT_VGA
) {
873 video_output
= VO_VGA
;
875 video_output
= VO_NTSC
;
880 * Nothing exciting about the DC PVR2 .. only a measly 8MiB.
882 pvr2_fix
.smem_start
= 0xa5000000; /* RAM starts here */
883 pvr2_fix
.smem_len
= 8 << 20;
885 pvr2_fix
.mmio_start
= 0xa05f8000; /* registers start here */
886 pvr2_fix
.mmio_len
= 0x2000;
888 if (request_irq(HW_EVENT_VSYNC
, pvr2fb_interrupt
, 0,
889 "pvr2 VBL handler", fb_info
)) {
894 if (request_dma(pvr2dma
, "pvr2") != 0) {
895 free_irq(HW_EVENT_VSYNC
, 0);
900 return pvr2fb_common_init();
903 static void __exit
pvr2fb_dc_exit(void)
905 if (fb_info
->screen_base
) {
906 iounmap(fb_info
->screen_base
);
907 fb_info
->screen_base
= NULL
;
909 if (currentpar
->mmio_base
) {
910 iounmap((void *)currentpar
->mmio_base
);
911 currentpar
->mmio_base
= 0;
914 free_irq(HW_EVENT_VSYNC
, 0);
919 #endif /* CONFIG_SH_DREAMCAST */
922 static int __devinit
pvr2fb_pci_probe(struct pci_dev
*pdev
,
923 const struct pci_device_id
*ent
)
927 ret
= pci_enable_device(pdev
);
929 printk(KERN_ERR
"pvr2fb: PCI enable failed\n");
933 ret
= pci_request_regions(pdev
, "pvr2fb");
935 printk(KERN_ERR
"pvr2fb: PCI request regions failed\n");
940 * Slightly more exciting than the DC PVR2 .. 16MiB!
942 pvr2_fix
.smem_start
= pci_resource_start(pdev
, 0);
943 pvr2_fix
.smem_len
= pci_resource_len(pdev
, 0);
945 pvr2_fix
.mmio_start
= pci_resource_start(pdev
, 1);
946 pvr2_fix
.mmio_len
= pci_resource_len(pdev
, 1);
948 fb_info
->device
= &pdev
->dev
;
950 return pvr2fb_common_init();
953 static void __devexit
pvr2fb_pci_remove(struct pci_dev
*pdev
)
955 if (fb_info
->screen_base
) {
956 iounmap(fb_info
->screen_base
);
957 fb_info
->screen_base
= NULL
;
959 if (currentpar
->mmio_base
) {
960 iounmap((void *)currentpar
->mmio_base
);
961 currentpar
->mmio_base
= 0;
964 pci_release_regions(pdev
);
967 static struct pci_device_id pvr2fb_pci_tbl
[] __devinitdata
= {
968 { PCI_VENDOR_ID_NEC
, PCI_DEVICE_ID_NEC_NEON250
,
969 PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0 },
973 MODULE_DEVICE_TABLE(pci
, pvr2fb_pci_tbl
);
975 static struct pci_driver pvr2fb_pci_driver
= {
977 .id_table
= pvr2fb_pci_tbl
,
978 .probe
= pvr2fb_pci_probe
,
979 .remove
= __devexit_p(pvr2fb_pci_remove
),
982 static int __init
pvr2fb_pci_init(void)
984 return pci_register_driver(&pvr2fb_pci_driver
);
987 static void __exit
pvr2fb_pci_exit(void)
989 pci_unregister_driver(&pvr2fb_pci_driver
);
991 #endif /* CONFIG_PCI */
993 static int __devinit
pvr2_get_param(const struct pvr2_params
*p
, const char *s
,
998 for (i
= 0 ; i
< size
; i
++ ) {
1000 if (!strnicmp(p
[i
].name
, s
, strlen(s
)))
1003 if (p
[i
].val
== val
)
1004 return (int)p
[i
].name
;
1011 * Parse command arguments. Supported arguments are:
1012 * inverse Use inverse color maps
1013 * cable:composite|rgb|vga Override the video cable type
1014 * output:NTSC|PAL|VGA Override the video output format
1016 * <xres>x<yres>[-<bpp>][@<refresh>] or,
1017 * <name>[-<bpp>][@<refresh>] Startup using this video mode
1021 static int __init
pvr2fb_setup(char *options
)
1025 char output_arg
[80];
1027 if (!options
|| !*options
)
1030 while ((this_opt
= strsep(&options
, ","))) {
1033 if (!strcmp(this_opt
, "inverse")) {
1035 } else if (!strncmp(this_opt
, "cable:", 6)) {
1036 strcpy(cable_arg
, this_opt
+ 6);
1037 } else if (!strncmp(this_opt
, "output:", 7)) {
1038 strcpy(output_arg
, this_opt
+ 7);
1039 } else if (!strncmp(this_opt
, "nopan", 5)) {
1041 } else if (!strncmp(this_opt
, "nowrap", 6)) {
1044 mode_option
= this_opt
;
1049 cable_type
= pvr2_get_param(cables
, cable_arg
, 0, 3);
1051 video_output
= pvr2_get_param(outputs
, output_arg
, 0, 3);
1057 static struct pvr2_board
{
1061 } board_driver
[] = {
1062 #ifdef CONFIG_SH_DREAMCAST
1063 { pvr2fb_dc_init
, pvr2fb_dc_exit
, "Sega DC PVR2" },
1066 { pvr2fb_pci_init
, pvr2fb_pci_exit
, "PCI PVR2" },
1071 static int __init
pvr2fb_init(void)
1073 int i
, ret
= -ENODEV
;
1077 char *option
= NULL
;
1079 if (fb_get_options("pvr2fb", &option
))
1081 pvr2fb_setup(option
);
1083 size
= sizeof(struct fb_info
) + sizeof(struct pvr2fb_par
) + 16 * sizeof(u32
);
1085 fb_info
= kmalloc(size
, GFP_KERNEL
);
1087 printk(KERN_ERR
"Failed to allocate memory for fb_info\n");
1091 memset(fb_info
, 0, size
);
1093 currentpar
= (struct pvr2fb_par
*)(fb_info
+ 1);
1095 for (i
= 0; i
< ARRAY_SIZE(board_driver
); i
++) {
1096 struct pvr2_board
*pvr_board
= board_driver
+ i
;
1098 if (!pvr_board
->init
)
1101 ret
= pvr_board
->init();
1104 printk(KERN_ERR
"pvr2fb: Failed init of %s device\n",
1114 static void __exit
pvr2fb_exit(void)
1118 for (i
= 0; i
< ARRAY_SIZE(board_driver
); i
++) {
1119 struct pvr2_board
*pvr_board
= board_driver
+ i
;
1121 if (pvr_board
->exit
)
1125 #ifdef CONFIG_SH_STORE_QUEUES
1126 sq_unmap(pvr2fb_map
);
1129 unregister_framebuffer(fb_info
);
1133 module_init(pvr2fb_init
);
1134 module_exit(pvr2fb_exit
);
1136 MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>, M. R. Brown <mrbrown@0xd6.org>");
1137 MODULE_DESCRIPTION("Framebuffer driver for NEC PowerVR 2 based graphics boards");
1138 MODULE_LICENSE("GPL");