1 // SPDX-License-Identifier: GPL-2.0-only
3 * drivers/video/pvr2fb.c
5 * Frame buffer and fbcon support for the NEC PowerVR2 found within the Sega
8 * Copyright (c) 2001 M. R. Brown <mrbrown@0xd6.org>
9 * Copyright (c) 2001 - 2008 Paul Mundt <lethal@linux-sh.org>
11 * This driver is mostly based on the excellent amifb and vfb sources. It uses
12 * an odd scheme for converting hardware values to/from framebuffer values,
13 * here are some hacked-up formulas:
15 * The Dreamcast has screen offsets from each side of its four borders and
16 * the start offsets of the display window. I used these values to calculate
17 * 'pseudo' values (think of them as placeholders) for the fb video mode, so
18 * that when it came time to convert these values back into their hardware
19 * values, I could just add mode- specific offsets to get the correct mode
22 * left_margin = diwstart_h - borderstart_h;
23 * right_margin = borderstop_h - (diwstart_h + xres);
24 * upper_margin = diwstart_v - borderstart_v;
25 * lower_margin = borderstop_v - (diwstart_h + yres);
27 * hsync_len = borderstart_h + (hsync_total - borderstop_h);
28 * vsync_len = borderstart_v + (vsync_total - borderstop_v);
30 * Then, when it's time to convert back to hardware settings, the only
31 * constants are the borderstart_* offsets, all other values are derived from
35 * borderstart_h = 116;
38 * borderstop_h = borderstart_h + hsync_total - hsync_len;
40 * diwstart_v = borderstart_v - upper_margin;
42 * However, in the current implementation, the borderstart values haven't had
43 * the benefit of being fully researched, so some modes may be broken.
48 #include <linux/module.h>
49 #include <linux/kernel.h>
50 #include <linux/errno.h>
51 #include <linux/string.h>
53 #include <linux/slab.h>
54 #include <linux/delay.h>
55 #include <linux/interrupt.h>
57 #include <linux/init.h>
58 #include <linux/pci.h>
60 #ifdef CONFIG_SH_DREAMCAST
61 #include <asm/machvec.h>
62 #include <mach-dreamcast/mach/sysasic.h>
65 #ifdef CONFIG_PVR2_DMA
66 #include <linux/pagemap.h>
71 #ifdef CONFIG_SH_STORE_QUEUES
72 #include <linux/uaccess.h>
76 #ifndef PCI_DEVICE_ID_NEC_NEON250
77 # define PCI_DEVICE_ID_NEC_NEON250 0x0067
80 /* 2D video registers */
81 #define DISP_BASE par->mmio_base
82 #define DISP_BRDRCOLR (DISP_BASE + 0x40)
83 #define DISP_DIWMODE (DISP_BASE + 0x44)
84 #define DISP_DIWADDRL (DISP_BASE + 0x50)
85 #define DISP_DIWADDRS (DISP_BASE + 0x54)
86 #define DISP_DIWSIZE (DISP_BASE + 0x5c)
87 #define DISP_SYNCCONF (DISP_BASE + 0xd0)
88 #define DISP_BRDRHORZ (DISP_BASE + 0xd4)
89 #define DISP_SYNCSIZE (DISP_BASE + 0xd8)
90 #define DISP_BRDRVERT (DISP_BASE + 0xdc)
91 #define DISP_DIWCONF (DISP_BASE + 0xe8)
92 #define DISP_DIWHSTRT (DISP_BASE + 0xec)
93 #define DISP_DIWVSTRT (DISP_BASE + 0xf0)
94 #define DISP_PIXDEPTH (DISP_BASE + 0x108)
96 /* Pixel clocks, one for TV output, doubled for VGA output */
100 /* This is for 60Hz - the VTOTAL is doubled for interlaced modes */
101 #define PAL_HTOTAL 863
102 #define PAL_VTOTAL 312
103 #define NTSC_HTOTAL 857
104 #define NTSC_VTOTAL 262
106 /* Supported cable types */
107 enum { CT_VGA, CT_NONE, CT_RGB, CT_COMPOSITE };
109 /* Supported video output types */
110 enum { VO_PAL, VO_NTSC, VO_VGA };
112 /* Supported palette types */
113 enum { PAL_ARGB1555, PAL_RGB565, PAL_ARGB4444, PAL_ARGB8888 };
115 struct pvr2_params { unsigned int val; char *name; };
116 static struct pvr2_params cables[] = {
117 { CT_VGA, "VGA" }, { CT_RGB, "RGB" }, { CT_COMPOSITE, "COMPOSITE" },
120 static struct pvr2_params outputs[] = {
121 { VO_PAL, "PAL" }, { VO_NTSC, "NTSC" }, { VO_VGA, "VGA" },
125 * This describes the current video mode
128 static struct pvr2fb_par {
129 unsigned int hsync_total; /* Clocks/line */
130 unsigned int vsync_total; /* Lines/field */
131 unsigned int borderstart_h;
132 unsigned int borderstop_h;
133 unsigned int borderstart_v;
134 unsigned int borderstop_v;
135 unsigned int diwstart_h; /* Horizontal offset of the display field */
136 unsigned int diwstart_v; /* Vertical offset of the display field, for
137 interlaced modes, this is the long field */
138 unsigned long disp_start; /* Address of image within VRAM */
139 unsigned char is_interlaced; /* Is the display interlaced? */
140 unsigned char is_doublescan; /* Are scanlines output twice? (doublescan) */
141 unsigned char is_lowres; /* Is horizontal pixel-doubling enabled? */
143 unsigned long mmio_base; /* MMIO base */
147 static struct fb_info *fb_info;
149 static struct fb_fix_screeninfo pvr2_fix = {
150 .id = "NEC PowerVR2",
151 .type = FB_TYPE_PACKED_PIXELS,
152 .visual = FB_VISUAL_TRUECOLOR,
155 .accel = FB_ACCEL_NONE,
158 static const struct fb_var_screeninfo pvr2_var = {
165 .green = { 5, 6, 0 },
167 .activate = FB_ACTIVATE_NOW,
170 .vmode = FB_VMODE_NONINTERLACED,
173 static int cable_type = CT_VGA;
174 static int video_output = VO_VGA;
176 static int nopan = 0;
177 static int nowrap = 1;
180 * We do all updating, blanking, etc. during the vertical retrace period
182 static unsigned int do_vmode_full = 0; /* Change the video mode */
183 static unsigned int do_vmode_pan = 0; /* Update the video mode */
184 static short do_blank = 0; /* (Un)Blank the screen */
186 static unsigned int is_blanked = 0; /* Is the screen blanked? */
188 #ifdef CONFIG_SH_STORE_QUEUES
189 static unsigned long pvr2fb_map;
192 #ifdef CONFIG_PVR2_DMA
193 static unsigned int shdma = PVR2_CASCADE_CHAN;
194 static unsigned int pvr2dma = ONCHIP_NR_DMA_CHANNELS;
197 static int pvr2fb_setcolreg(unsigned int regno, unsigned int red, unsigned int green, unsigned int blue,
198 unsigned int transp, struct fb_info *info);
199 static int pvr2fb_blank(int blank, struct fb_info *info);
200 static unsigned long get_line_length(int xres_virtual, int bpp);
201 static void set_color_bitfields(struct fb_var_screeninfo *var);
202 static int pvr2fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info);
203 static int pvr2fb_set_par(struct fb_info *info);
204 static void pvr2_update_display(struct fb_info *info);
205 static void pvr2_init_display(struct fb_info *info);
206 static void pvr2_do_blank(void);
207 static irqreturn_t pvr2fb_interrupt(int irq, void *dev_id);
208 static int pvr2_init_cable(void);
209 static int pvr2_get_param(const struct pvr2_params *p, const char *s,
211 #ifdef CONFIG_PVR2_DMA
212 static ssize_t pvr2fb_write(struct fb_info *info, const char *buf,
213 size_t count, loff_t *ppos);
216 static struct fb_ops pvr2fb_ops = {
217 .owner = THIS_MODULE,
218 .fb_setcolreg = pvr2fb_setcolreg,
219 .fb_blank = pvr2fb_blank,
220 .fb_check_var = pvr2fb_check_var,
221 .fb_set_par = pvr2fb_set_par,
222 #ifdef CONFIG_PVR2_DMA
223 .fb_write = pvr2fb_write,
225 .fb_fillrect = cfb_fillrect,
226 .fb_copyarea = cfb_copyarea,
227 .fb_imageblit = cfb_imageblit,
230 static struct fb_videomode pvr2_modedb[] = {
232 * Broadcast video modes (PAL and NTSC). I'm unfamiliar with
233 * PAL-M and PAL-N, but from what I've read both modes parallel PAL and
234 * NTSC, so it shouldn't be a problem (I hope).
238 /* 640x480 @ 60Hz interlaced (NTSC) */
239 "ntsc_640x480i", 60, 640, 480, TV_CLK, 38, 33, 0, 18, 146, 26,
240 FB_SYNC_BROADCAST, FB_VMODE_INTERLACED | FB_VMODE_YWRAP
242 /* 640x240 @ 60Hz (NTSC) */
243 /* XXX: Broken! Don't use... */
244 "ntsc_640x240", 60, 640, 240, TV_CLK, 38, 33, 0, 0, 146, 22,
245 FB_SYNC_BROADCAST, FB_VMODE_YWRAP
247 /* 640x480 @ 60hz (VGA) */
248 "vga_640x480", 60, 640, 480, VGA_CLK, 38, 33, 0, 18, 146, 26,
253 #define NUM_TOTAL_MODES ARRAY_SIZE(pvr2_modedb)
255 #define DEFMODE_NTSC 0
256 #define DEFMODE_PAL 0
257 #define DEFMODE_VGA 2
259 static int defmode = DEFMODE_NTSC;
260 static char *mode_option = NULL;
262 static inline void pvr2fb_set_pal_type(unsigned int type)
264 struct pvr2fb_par *par = (struct pvr2fb_par *)fb_info->par;
266 fb_writel(type, par->mmio_base + 0x108);
269 static inline void pvr2fb_set_pal_entry(struct pvr2fb_par *par,
273 fb_writel(val, par->mmio_base + 0x1000 + (4 * regno));
276 static int pvr2fb_blank(int blank, struct fb_info *info)
278 do_blank = blank ? blank : -1;
282 static inline unsigned long get_line_length(int xres_virtual, int bpp)
284 return (unsigned long)((((xres_virtual*bpp)+31)&~31) >> 3);
287 static void set_color_bitfields(struct fb_var_screeninfo *var)
289 switch (var->bits_per_pixel) {
290 case 16: /* RGB 565 */
291 pvr2fb_set_pal_type(PAL_RGB565);
292 var->red.offset = 11; var->red.length = 5;
293 var->green.offset = 5; var->green.length = 6;
294 var->blue.offset = 0; var->blue.length = 5;
295 var->transp.offset = 0; var->transp.length = 0;
297 case 24: /* RGB 888 */
298 var->red.offset = 16; var->red.length = 8;
299 var->green.offset = 8; var->green.length = 8;
300 var->blue.offset = 0; var->blue.length = 8;
301 var->transp.offset = 0; var->transp.length = 0;
303 case 32: /* ARGB 8888 */
304 pvr2fb_set_pal_type(PAL_ARGB8888);
305 var->red.offset = 16; var->red.length = 8;
306 var->green.offset = 8; var->green.length = 8;
307 var->blue.offset = 0; var->blue.length = 8;
308 var->transp.offset = 24; var->transp.length = 8;
313 static int pvr2fb_setcolreg(unsigned int regno, unsigned int red,
314 unsigned int green, unsigned int blue,
315 unsigned int transp, struct fb_info *info)
317 struct pvr2fb_par *par = (struct pvr2fb_par *)info->par;
320 if (regno > info->cmap.len)
324 * We only support the hardware palette for 16 and 32bpp. It's also
325 * expected that the palette format has been set by the time we get
326 * here, so we don't waste time setting it again.
328 switch (info->var.bits_per_pixel) {
329 case 16: /* RGB 565 */
330 tmp = (red & 0xf800) |
331 ((green & 0xfc00) >> 5) |
332 ((blue & 0xf800) >> 11);
334 pvr2fb_set_pal_entry(par, regno, tmp);
336 case 24: /* RGB 888 */
337 red >>= 8; green >>= 8; blue >>= 8;
338 tmp = (red << 16) | (green << 8) | blue;
340 case 32: /* ARGB 8888 */
341 red >>= 8; green >>= 8; blue >>= 8;
342 tmp = (transp << 24) | (red << 16) | (green << 8) | blue;
344 pvr2fb_set_pal_entry(par, regno, tmp);
347 pr_debug("Invalid bit depth %d?!?\n", info->var.bits_per_pixel);
352 ((u32*)(info->pseudo_palette))[regno] = tmp;
357 static int pvr2fb_set_par(struct fb_info *info)
359 struct pvr2fb_par *par = (struct pvr2fb_par *)info->par;
360 struct fb_var_screeninfo *var = &info->var;
361 unsigned long line_length;
365 * XXX: It's possible that a user could use a VGA box, change the cable
366 * type in hardware (i.e. switch from VGA<->composite), then change
367 * modes (i.e. switching to another VT). If that happens we should
368 * automagically change the output format to cope, but currently I
369 * don't have a VGA box to make sure this works properly.
371 cable_type = pvr2_init_cable();
372 if (cable_type == CT_VGA && video_output != VO_VGA)
373 video_output = VO_VGA;
375 var->vmode &= FB_VMODE_MASK;
376 if (var->vmode & FB_VMODE_INTERLACED && video_output != VO_VGA)
377 par->is_interlaced = 1;
379 * XXX: Need to be more creative with this (i.e. allow doublecan for
382 if (var->vmode & FB_VMODE_DOUBLE && video_output == VO_VGA)
383 par->is_doublescan = 1;
385 par->hsync_total = var->left_margin + var->xres + var->right_margin +
387 par->vsync_total = var->upper_margin + var->yres + var->lower_margin +
390 if (var->sync & FB_SYNC_BROADCAST) {
391 vtotal = par->vsync_total;
392 if (par->is_interlaced)
394 if (vtotal > (PAL_VTOTAL + NTSC_VTOTAL)/2) {
395 /* XXX: Check for start values here... */
396 /* XXX: Check hardware for PAL-compatibility */
397 par->borderstart_h = 116;
398 par->borderstart_v = 44;
400 /* NTSC video output */
401 par->borderstart_h = 126;
402 par->borderstart_v = 18;
406 /* XXX: What else needs to be checked? */
408 * XXX: We have a little freedom in VGA modes, what ranges
409 * should be here (i.e. hsync/vsync totals, etc.)?
411 par->borderstart_h = 126;
412 par->borderstart_v = 40;
415 /* Calculate the remainding offsets */
416 par->diwstart_h = par->borderstart_h + var->left_margin;
417 par->diwstart_v = par->borderstart_v + var->upper_margin;
418 par->borderstop_h = par->diwstart_h + var->xres +
420 par->borderstop_v = par->diwstart_v + var->yres +
423 if (!par->is_interlaced)
424 par->borderstop_v /= 2;
425 if (info->var.xres < 640)
428 line_length = get_line_length(var->xres_virtual, var->bits_per_pixel);
429 par->disp_start = info->fix.smem_start + (line_length * var->yoffset) * line_length;
430 info->fix.line_length = line_length;
434 static int pvr2fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
436 struct pvr2fb_par *par = (struct pvr2fb_par *)info->par;
437 unsigned int vtotal, hsync_total;
438 unsigned long line_length;
440 if (var->pixclock != TV_CLK && var->pixclock != VGA_CLK) {
441 pr_debug("Invalid pixclock value %d\n", var->pixclock);
449 if (var->xres_virtual < var->xres)
450 var->xres_virtual = var->xres;
451 if (var->yres_virtual < var->yres)
452 var->yres_virtual = var->yres;
454 if (var->bits_per_pixel <= 16)
455 var->bits_per_pixel = 16;
456 else if (var->bits_per_pixel <= 24)
457 var->bits_per_pixel = 24;
458 else if (var->bits_per_pixel <= 32)
459 var->bits_per_pixel = 32;
461 set_color_bitfields(var);
463 if (var->vmode & FB_VMODE_YWRAP) {
464 if (var->xoffset || var->yoffset < 0 ||
465 var->yoffset >= var->yres_virtual) {
466 var->xoffset = var->yoffset = 0;
468 if (var->xoffset > var->xres_virtual - var->xres ||
469 var->yoffset > var->yres_virtual - var->yres ||
470 var->xoffset < 0 || var->yoffset < 0)
471 var->xoffset = var->yoffset = 0;
474 var->xoffset = var->yoffset = 0;
478 * XXX: Need to be more creative with this (i.e. allow doublecan for
481 if (var->yres < 480 && video_output == VO_VGA)
482 var->vmode |= FB_VMODE_DOUBLE;
484 if (video_output != VO_VGA) {
485 var->sync |= FB_SYNC_BROADCAST;
486 var->vmode |= FB_VMODE_INTERLACED;
488 var->sync &= ~FB_SYNC_BROADCAST;
489 var->vmode &= ~FB_VMODE_INTERLACED;
490 var->vmode |= FB_VMODE_NONINTERLACED;
493 if ((var->activate & FB_ACTIVATE_MASK) != FB_ACTIVATE_TEST) {
494 var->right_margin = par->borderstop_h -
495 (par->diwstart_h + var->xres);
496 var->left_margin = par->diwstart_h - par->borderstart_h;
497 var->hsync_len = par->borderstart_h +
498 (par->hsync_total - par->borderstop_h);
500 var->upper_margin = par->diwstart_v - par->borderstart_v;
501 var->lower_margin = par->borderstop_v -
502 (par->diwstart_v + var->yres);
503 var->vsync_len = par->borderstop_v +
504 (par->vsync_total - par->borderstop_v);
507 hsync_total = var->left_margin + var->xres + var->right_margin +
509 vtotal = var->upper_margin + var->yres + var->lower_margin +
512 if (var->sync & FB_SYNC_BROADCAST) {
513 if (var->vmode & FB_VMODE_INTERLACED)
515 if (vtotal > (PAL_VTOTAL + NTSC_VTOTAL)/2) {
516 /* PAL video output */
517 /* XXX: Should be using a range here ... ? */
518 if (hsync_total != PAL_HTOTAL) {
519 pr_debug("invalid hsync total for PAL\n");
523 /* NTSC video output */
524 if (hsync_total != NTSC_HTOTAL) {
525 pr_debug("invalid hsync total for NTSC\n");
531 /* Check memory sizes */
532 line_length = get_line_length(var->xres_virtual, var->bits_per_pixel);
533 if (line_length * var->yres_virtual > info->fix.smem_len)
539 static void pvr2_update_display(struct fb_info *info)
541 struct pvr2fb_par *par = (struct pvr2fb_par *) info->par;
542 struct fb_var_screeninfo *var = &info->var;
544 /* Update the start address of the display image */
545 fb_writel(par->disp_start, DISP_DIWADDRL);
546 fb_writel(par->disp_start +
547 get_line_length(var->xoffset+var->xres, var->bits_per_pixel),
552 * Initialize the video mode. Currently, the 16bpp and 24bpp modes aren't
553 * very stable. It's probably due to the fact that a lot of the 2D video
554 * registers are still undocumented.
557 static void pvr2_init_display(struct fb_info *info)
559 struct pvr2fb_par *par = (struct pvr2fb_par *) info->par;
560 struct fb_var_screeninfo *var = &info->var;
561 unsigned int diw_height, diw_width, diw_modulo = 1;
562 unsigned int bytesperpixel = var->bits_per_pixel >> 3;
564 /* hsync and vsync totals */
565 fb_writel((par->vsync_total << 16) | par->hsync_total, DISP_SYNCSIZE);
567 /* column height, modulo, row width */
568 /* since we're "panning" within vram, we need to offset things based
569 * on the offset from the virtual x start to our real gfx. */
570 if (video_output != VO_VGA && par->is_interlaced)
571 diw_modulo += info->fix.line_length / 4;
572 diw_height = (par->is_interlaced ? var->yres / 2 : var->yres);
573 diw_width = get_line_length(var->xres, var->bits_per_pixel) / 4;
574 fb_writel((diw_modulo << 20) | (--diw_height << 10) | --diw_width,
577 /* display address, long and short fields */
578 fb_writel(par->disp_start, DISP_DIWADDRL);
579 fb_writel(par->disp_start +
580 get_line_length(var->xoffset+var->xres, var->bits_per_pixel),
583 /* border horizontal, border vertical, border color */
584 fb_writel((par->borderstart_h << 16) | par->borderstop_h, DISP_BRDRHORZ);
585 fb_writel((par->borderstart_v << 16) | par->borderstop_v, DISP_BRDRVERT);
586 fb_writel(0, DISP_BRDRCOLR);
588 /* display window start position */
589 fb_writel(par->diwstart_h, DISP_DIWHSTRT);
590 fb_writel((par->diwstart_v << 16) | par->diwstart_v, DISP_DIWVSTRT);
593 fb_writel((0x16 << 16) | par->is_lowres, DISP_DIWCONF);
595 /* clock doubler (for VGA), scan doubler, display enable */
596 fb_writel(((video_output == VO_VGA) << 23) |
597 (par->is_doublescan << 1) | 1, DISP_DIWMODE);
600 fb_writel(fb_readl(DISP_DIWMODE) | (--bytesperpixel << 2), DISP_DIWMODE);
601 fb_writel(bytesperpixel << 2, DISP_PIXDEPTH);
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);
667 else if (cable_type == CT_RGB)
668 fb_writel(1 << 9, VOUTC);
675 #ifdef CONFIG_PVR2_DMA
676 static ssize_t pvr2fb_write(struct fb_info *info, const char *buf,
677 size_t count, loff_t *ppos)
679 unsigned long dst, start, end, len;
680 unsigned int nr_pages;
684 nr_pages = (count + PAGE_SIZE - 1) >> PAGE_SHIFT;
686 pages = kmalloc_array(nr_pages, sizeof(struct page *), GFP_KERNEL);
690 ret = get_user_pages_fast((unsigned long)buf, nr_pages, FOLL_WRITE, pages);
691 if (ret < nr_pages) {
697 dma_configure_channel(shdma, 0x12c1);
699 dst = (unsigned long)fb_info->screen_base + *ppos;
700 start = (unsigned long)page_address(pages[0]);
701 end = (unsigned long)page_address(pages[nr_pages]);
702 len = nr_pages << PAGE_SHIFT;
704 /* Half-assed contig check */
705 if (start + len == end) {
706 /* As we do this in one shot, it's either all or nothing.. */
707 if ((*ppos + len) > fb_info->fix.smem_len) {
712 dma_write(shdma, start, 0, len);
713 dma_write(pvr2dma, 0, dst, len);
714 dma_wait_for_completion(pvr2dma);
719 /* Not contiguous, writeout per-page instead.. */
720 for (i = 0; i < nr_pages; i++, dst += PAGE_SIZE) {
721 if ((*ppos + (i << PAGE_SHIFT)) > fb_info->fix.smem_len) {
726 dma_write_page(shdma, (unsigned long)page_address(pages[i]), 0);
727 dma_write_page(pvr2dma, 0, dst);
728 dma_wait_for_completion(pvr2dma);
736 for (i = 0; i < nr_pages; i++)
743 #endif /* CONFIG_PVR2_DMA */
748 * Common init code for the PVR2 chips.
750 * This mostly takes care of the common aspects of the fb setup and
751 * registration. It's expected that the board-specific init code has
752 * already setup pvr2_fix with something meaningful at this point.
754 * Device info reporting is also done here, as well as picking a sane
755 * default from the modedb. For board-specific modelines, simply define
756 * a per-board modedb.
758 * Also worth noting is that the cable and video output types are likely
759 * always going to be VGA for the PCI-based PVR2 boards, but we leave this
760 * in for flexibility anyways. Who knows, maybe someone has tv-out on a
761 * PCI-based version of these things ;-)
763 static int pvr2fb_common_init(void)
765 struct pvr2fb_par *par = currentpar;
766 unsigned long modememused, rev;
768 fb_info->screen_base = ioremap_nocache(pvr2_fix.smem_start,
771 if (!fb_info->screen_base) {
772 printk(KERN_ERR "pvr2fb: Failed to remap smem space\n");
776 par->mmio_base = (unsigned long)ioremap_nocache(pvr2_fix.mmio_start,
778 if (!par->mmio_base) {
779 printk(KERN_ERR "pvr2fb: Failed to remap mmio space\n");
783 fb_memset(fb_info->screen_base, 0, pvr2_fix.smem_len);
785 pvr2_fix.ypanstep = nopan ? 0 : 1;
786 pvr2_fix.ywrapstep = nowrap ? 0 : 1;
788 fb_info->fbops = &pvr2fb_ops;
789 fb_info->fix = pvr2_fix;
790 fb_info->par = currentpar;
791 fb_info->pseudo_palette = currentpar->palette;
792 fb_info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
794 if (video_output == VO_VGA)
795 defmode = DEFMODE_VGA;
798 mode_option = "640x480@60";
800 if (!fb_find_mode(&fb_info->var, fb_info, mode_option, pvr2_modedb,
801 NUM_TOTAL_MODES, &pvr2_modedb[defmode], 16))
802 fb_info->var = pvr2_var;
804 fb_alloc_cmap(&fb_info->cmap, 256, 0);
806 if (register_framebuffer(fb_info) < 0)
808 /*Must write PIXDEPTH to register before anything is displayed - so force init */
809 pvr2_init_display(fb_info);
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 fb_info(fb_info, "%s (rev %ld.%ld) frame buffer device, using %ldk/%ldk of video memory\n",
818 fb_info->fix.id, (rev >> 4) & 0x0f, rev & 0x0f,
820 (unsigned long)(fb_info->fix.smem_len >> 10));
821 fb_info(fb_info, "Mode %dx%d-%d pitch = %ld cable: %s video output: %s\n",
822 fb_info->var.xres, fb_info->var.yres,
823 fb_info->var.bits_per_pixel,
824 get_line_length(fb_info->var.xres, fb_info->var.bits_per_pixel),
825 (char *)pvr2_get_param(cables, NULL, cable_type, 3),
826 (char *)pvr2_get_param(outputs, NULL, video_output, 3));
828 #ifdef CONFIG_SH_STORE_QUEUES
829 fb_notice(fb_info, "registering with SQ API\n");
831 pvr2fb_map = sq_remap(fb_info->fix.smem_start, fb_info->fix.smem_len,
832 fb_info->fix.id, PAGE_SHARED);
834 fb_notice(fb_info, "Mapped video memory to SQ addr 0x%lx\n",
841 if (fb_info->screen_base)
842 iounmap(fb_info->screen_base);
844 iounmap((void *)par->mmio_base);
849 #ifdef CONFIG_SH_DREAMCAST
850 static int __init pvr2fb_dc_init(void)
852 if (!mach_is_dreamcast())
855 /* Make a guess at the monitor based on the attached cable */
856 if (pvr2_init_cable() == CT_VGA) {
857 fb_info->monspecs.hfmin = 30000;
858 fb_info->monspecs.hfmax = 70000;
859 fb_info->monspecs.vfmin = 60;
860 fb_info->monspecs.vfmax = 60;
862 /* Not VGA, using a TV (taken from acornfb) */
863 fb_info->monspecs.hfmin = 15469;
864 fb_info->monspecs.hfmax = 15781;
865 fb_info->monspecs.vfmin = 49;
866 fb_info->monspecs.vfmax = 51;
870 * XXX: This needs to pull default video output via BIOS or other means
872 if (video_output < 0) {
873 if (cable_type == CT_VGA) {
874 video_output = VO_VGA;
876 video_output = VO_NTSC;
881 * Nothing exciting about the DC PVR2 .. only a measly 8MiB.
883 pvr2_fix.smem_start = 0xa5000000; /* RAM starts here */
884 pvr2_fix.smem_len = 8 << 20;
886 pvr2_fix.mmio_start = 0xa05f8000; /* registers start here */
887 pvr2_fix.mmio_len = 0x2000;
889 if (request_irq(HW_EVENT_VSYNC, pvr2fb_interrupt, IRQF_SHARED,
890 "pvr2 VBL handler", fb_info)) {
894 #ifdef CONFIG_PVR2_DMA
895 if (request_dma(pvr2dma, "pvr2") != 0) {
896 free_irq(HW_EVENT_VSYNC, fb_info);
901 return pvr2fb_common_init();
904 static void __exit pvr2fb_dc_exit(void)
906 if (fb_info->screen_base) {
907 iounmap(fb_info->screen_base);
908 fb_info->screen_base = NULL;
910 if (currentpar->mmio_base) {
911 iounmap((void *)currentpar->mmio_base);
912 currentpar->mmio_base = 0;
915 free_irq(HW_EVENT_VSYNC, fb_info);
916 #ifdef CONFIG_PVR2_DMA
920 #endif /* CONFIG_SH_DREAMCAST */
923 static int pvr2fb_pci_probe(struct pci_dev *pdev,
924 const struct pci_device_id *ent)
928 ret = pci_enable_device(pdev);
930 printk(KERN_ERR "pvr2fb: PCI enable failed\n");
934 ret = pci_request_regions(pdev, "pvr2fb");
936 printk(KERN_ERR "pvr2fb: PCI request regions failed\n");
941 * Slightly more exciting than the DC PVR2 .. 16MiB!
943 pvr2_fix.smem_start = pci_resource_start(pdev, 0);
944 pvr2_fix.smem_len = pci_resource_len(pdev, 0);
946 pvr2_fix.mmio_start = pci_resource_start(pdev, 1);
947 pvr2_fix.mmio_len = pci_resource_len(pdev, 1);
949 fb_info->device = &pdev->dev;
951 return pvr2fb_common_init();
954 static void pvr2fb_pci_remove(struct pci_dev *pdev)
956 if (fb_info->screen_base) {
957 iounmap(fb_info->screen_base);
958 fb_info->screen_base = NULL;
960 if (currentpar->mmio_base) {
961 iounmap((void *)currentpar->mmio_base);
962 currentpar->mmio_base = 0;
965 pci_release_regions(pdev);
968 static const struct pci_device_id pvr2fb_pci_tbl[] = {
969 { PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_NEON250,
970 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
974 MODULE_DEVICE_TABLE(pci, pvr2fb_pci_tbl);
976 static struct pci_driver pvr2fb_pci_driver = {
978 .id_table = pvr2fb_pci_tbl,
979 .probe = pvr2fb_pci_probe,
980 .remove = pvr2fb_pci_remove,
983 static int __init pvr2fb_pci_init(void)
985 return pci_register_driver(&pvr2fb_pci_driver);
988 static void __exit pvr2fb_pci_exit(void)
990 pci_unregister_driver(&pvr2fb_pci_driver);
992 #endif /* CONFIG_PCI */
994 static int pvr2_get_param(const struct pvr2_params *p, const char *s, int val,
999 for (i = 0 ; i < size ; i++ ) {
1001 if (!strncasecmp(p[i].name, s, strlen(s)))
1004 if (p[i].val == val)
1005 return (int)p[i].name;
1012 * Parse command arguments. Supported arguments are:
1013 * inverse Use inverse color maps
1014 * cable:composite|rgb|vga Override the video cable type
1015 * output:NTSC|PAL|VGA Override the video output format
1017 * <xres>x<yres>[-<bpp>][@<refresh>] or,
1018 * <name>[-<bpp>][@<refresh>] Startup using this video mode
1022 static int __init pvr2fb_setup(char *options)
1026 char output_arg[80];
1028 if (!options || !*options)
1031 while ((this_opt = strsep(&options, ","))) {
1034 if (!strcmp(this_opt, "inverse")) {
1036 } else if (!strncmp(this_opt, "cable:", 6)) {
1037 strcpy(cable_arg, this_opt + 6);
1038 } else if (!strncmp(this_opt, "output:", 7)) {
1039 strcpy(output_arg, this_opt + 7);
1040 } else if (!strncmp(this_opt, "nopan", 5)) {
1042 } else if (!strncmp(this_opt, "nowrap", 6)) {
1045 mode_option = this_opt;
1050 cable_type = pvr2_get_param(cables, cable_arg, 0, 3);
1052 video_output = pvr2_get_param(outputs, output_arg, 0, 3);
1058 static struct pvr2_board {
1062 } board_driver[] __refdata = {
1063 #ifdef CONFIG_SH_DREAMCAST
1064 { pvr2fb_dc_init, pvr2fb_dc_exit, "Sega DC PVR2" },
1067 { pvr2fb_pci_init, pvr2fb_pci_exit, "PCI PVR2" },
1072 static int __init pvr2fb_init(void)
1074 int i, ret = -ENODEV;
1077 char *option = NULL;
1079 if (fb_get_options("pvr2fb", &option))
1081 pvr2fb_setup(option);
1084 fb_info = framebuffer_alloc(sizeof(struct pvr2fb_par), NULL);
1087 printk(KERN_ERR "Failed to allocate memory for fb_info\n");
1092 currentpar = fb_info->par;
1094 for (i = 0; i < ARRAY_SIZE(board_driver); i++) {
1095 struct pvr2_board *pvr_board = board_driver + i;
1097 if (!pvr_board->init)
1100 ret = pvr_board->init();
1103 printk(KERN_ERR "pvr2fb: Failed init of %s device\n",
1105 framebuffer_release(fb_info);
1113 static void __exit pvr2fb_exit(void)
1117 for (i = 0; i < ARRAY_SIZE(board_driver); i++) {
1118 struct pvr2_board *pvr_board = board_driver + i;
1120 if (pvr_board->exit)
1124 #ifdef CONFIG_SH_STORE_QUEUES
1125 sq_unmap(pvr2fb_map);
1128 unregister_framebuffer(fb_info);
1129 framebuffer_release(fb_info);
1132 module_init(pvr2fb_init);
1133 module_exit(pvr2fb_exit);
1135 MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>, M. R. Brown <mrbrown@0xd6.org>");
1136 MODULE_DESCRIPTION("Framebuffer driver for NEC PowerVR 2 based graphics boards");
1137 MODULE_LICENSE("GPL");