2 * controlfb.c -- frame buffer device for the PowerMac 'control' display
4 * Created 12 July 1998 by Dan Jacobowitz <dan@debian.org>
5 * Copyright (C) 1998 Dan Jacobowitz
6 * Copyright (C) 2001 Takashi Oe
8 * Mmap code by Michel Lanners <mlan@cpu.lu>
10 * Frame buffer structure from:
11 * drivers/video/chipsfb.c -- frame buffer device for
12 * Chips & Technologies 65550 chip.
14 * Copyright (C) 1998 Paul Mackerras
16 * This file is derived from the Powermac "chips" driver:
17 * Copyright (C) 1997 Fabio Riccardi.
18 * And from the frame buffer device for Open Firmware-initialized devices:
19 * Copyright (C) 1997 Geert Uytterhoeven.
21 * Hardware information from:
22 * control.c: Console support for PowerMac "control" display adaptor.
23 * Copyright (C) 1996 Paul Mackerras
25 * Updated to 2.5 framebuffer API by Ben Herrenschmidt
26 * <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>,
27 * and James Simmons <jsimmons@infradead.org>.
29 * This file is subject to the terms and conditions of the GNU General Public
30 * License. See the file COPYING in the main directory of this archive for
34 #include <linux/kernel.h>
35 #include <linux/errno.h>
36 #include <linux/string.h>
38 #include <linux/slab.h>
39 #include <linux/vmalloc.h>
40 #include <linux/delay.h>
41 #include <linux/interrupt.h>
43 #include <linux/of_address.h>
45 #include <linux/init.h>
46 #include <linux/pci.h>
47 #include <linux/nvram.h>
48 #include <linux/adb.h>
49 #include <linux/cuda.h>
50 #ifdef CONFIG_PPC_PMAC
53 #ifdef CONFIG_BOOTX_TEXT
54 #include <asm/btext.h>
58 #include "controlfb.h"
60 #if !defined(CONFIG_PPC_PMAC) || !defined(CONFIG_PPC32)
61 #define invalid_vram_cache(addr)
67 #define out_8(addr, val) (void)(val)
68 #define in_le32(addr) 0
69 #define out_le32(addr, val) (void)(val)
70 #ifndef pgprot_cached_wthru
71 #define pgprot_cached_wthru(prot) (prot)
74 static void invalid_vram_cache(void __force *addr)
85 struct fb_par_control {
91 struct control_regvals regvals;
96 #define DIRTY(z) ((x)->z != (y)->z)
97 #define DIRTY_CMAP(z) (memcmp(&((x)->z), &((y)->z), sizeof((y)->z)))
98 static inline int PAR_EQUAL(struct fb_par_control *x, struct fb_par_control *y)
103 for (i = 0; i < 3; i++)
104 results &= !DIRTY(regvals.clock_params[i]);
107 for (i = 0; i < 16; i++)
108 results &= !DIRTY(regvals.regs[i]);
111 return (!DIRTY(cmode) && !DIRTY(xres) && !DIRTY(yres)
112 && !DIRTY(vxres) && !DIRTY(vyres));
114 static inline int VAR_MATCH(struct fb_var_screeninfo *x, struct fb_var_screeninfo *y)
116 return (!DIRTY(bits_per_pixel) && !DIRTY(xres)
117 && !DIRTY(yres) && !DIRTY(xres_virtual)
118 && !DIRTY(yres_virtual)
119 && !DIRTY_CMAP(red) && !DIRTY_CMAP(green) && !DIRTY_CMAP(blue));
122 struct fb_info_control {
124 struct fb_par_control par;
125 u32 pseudo_palette[16];
127 struct cmap_regs __iomem *cmap_regs;
128 unsigned long cmap_regs_phys;
130 struct control_regs __iomem *control_regs;
131 unsigned long control_regs_phys;
132 unsigned long control_regs_size;
134 __u8 __iomem *frame_buffer;
135 unsigned long frame_buffer_phys;
136 unsigned long fb_orig_base;
137 unsigned long fb_orig_size;
139 int control_use_bank2;
140 unsigned long total_vram;
141 unsigned char vram_attr;
144 /* control register access macro */
145 #define CNTRL_REG(INFO,REG) (&(((INFO)->control_regs->REG).r))
148 /************************** Internal variables *******************************/
150 static struct fb_info_control *control_fb;
152 static int default_vmode __initdata = VMODE_NVRAM;
153 static int default_cmode __initdata = CMODE_NVRAM;
156 static int controlfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
157 u_int transp, struct fb_info *info)
159 struct fb_info_control *p =
160 container_of(info, struct fb_info_control, info);
170 out_8(&p->cmap_regs->addr, regno); /* tell clut what addr to fill */
171 out_8(&p->cmap_regs->lut, r); /* send one color channel at */
172 out_8(&p->cmap_regs->lut, g); /* a time... */
173 out_8(&p->cmap_regs->lut, b);
177 switch (p->par.cmode) {
179 p->pseudo_palette[regno] =
180 (regno << 10) | (regno << 5) | regno;
183 i = (regno << 8) | regno;
184 p->pseudo_palette[regno] = (i << 16) | i;
193 /******************** End of controlfb_ops implementation ******************/
197 static void set_control_clock(unsigned char *params)
199 #ifdef CONFIG_ADB_CUDA
200 struct adb_request req;
203 for (i = 0; i < 3; ++i) {
204 cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_GET_SET_IIC,
205 0x50, i + 1, params[i]);
206 while (!req.complete)
213 * Set screen start address according to var offset values
215 static inline void set_screen_start(int xoffset, int yoffset,
216 struct fb_info_control *p)
218 struct fb_par_control *par = &p->par;
220 par->xoffset = xoffset;
221 par->yoffset = yoffset;
222 out_le32(CNTRL_REG(p,start_addr),
223 par->yoffset * par->pitch + (par->xoffset << par->cmode));
226 #define RADACAL_WRITE(a,d) \
227 out_8(&p->cmap_regs->addr, (a)); \
228 out_8(&p->cmap_regs->dat, (d))
230 /* Now how about actually saying, Make it so! */
231 /* Some things in here probably don't need to be done each time. */
232 static void control_set_hardware(struct fb_info_control *p, struct fb_par_control *par)
234 struct control_regvals *r;
235 volatile struct preg __iomem *rp;
238 if (PAR_EQUAL(&p->par, par)) {
240 * check if only xoffset or yoffset differs.
241 * this prevents flickers in typical VT switch case.
243 if (p->par.xoffset != par->xoffset ||
244 p->par.yoffset != par->yoffset)
245 set_screen_start(par->xoffset, par->yoffset, p);
251 cmode = p->par.cmode;
254 /* Turn off display */
255 out_le32(CNTRL_REG(p,ctrl), 0x400 | par->ctrl);
257 set_control_clock(r->clock_params);
259 RADACAL_WRITE(0x20, r->radacal_ctrl);
260 RADACAL_WRITE(0x21, p->control_use_bank2 ? 0 : 1);
261 RADACAL_WRITE(0x10, 0);
262 RADACAL_WRITE(0x11, 0);
264 rp = &p->control_regs->vswin;
265 for (i = 0; i < 16; ++i, ++rp)
266 out_le32(&rp->r, r->regs[i]);
268 out_le32(CNTRL_REG(p,pitch), par->pitch);
269 out_le32(CNTRL_REG(p,mode), r->mode);
270 out_le32(CNTRL_REG(p,vram_attr), p->vram_attr);
271 out_le32(CNTRL_REG(p,start_addr), par->yoffset * par->pitch
272 + (par->xoffset << cmode));
273 out_le32(CNTRL_REG(p,rfrcnt), 0x1e5);
274 out_le32(CNTRL_REG(p,intr_ena), 0);
276 /* Turn on display */
277 out_le32(CNTRL_REG(p,ctrl), par->ctrl);
279 #ifdef CONFIG_BOOTX_TEXT
280 btext_update_display(p->frame_buffer_phys + CTRLFB_OFF,
281 p->par.xres, p->par.yres,
282 (cmode == CMODE_32? 32: cmode == CMODE_16? 16: 8),
284 #endif /* CONFIG_BOOTX_TEXT */
287 /* Work out which banks of VRAM we have installed. */
288 /* danj: I guess the card just ignores writes to nonexistant VRAM... */
290 static void __init find_vram_size(struct fb_info_control *p)
295 * Set VRAM in 2MB (bank 1) mode
296 * VRAM Bank 2 will be accessible through offset 0x600000 if present
297 * and VRAM Bank 1 will not respond at that offset even if present
299 out_le32(CNTRL_REG(p,vram_attr), 0x31);
301 out_8(&p->frame_buffer[0x600000], 0xb3);
302 out_8(&p->frame_buffer[0x600001], 0x71);
303 invalid_vram_cache(&p->frame_buffer[0x600000]);
305 bank2 = (in_8(&p->frame_buffer[0x600000]) == 0xb3)
306 && (in_8(&p->frame_buffer[0x600001]) == 0x71);
309 * Set VRAM in 2MB (bank 2) mode
310 * VRAM Bank 1 will be accessible through offset 0x000000 if present
311 * and VRAM Bank 2 will not respond at that offset even if present
313 out_le32(CNTRL_REG(p,vram_attr), 0x39);
315 out_8(&p->frame_buffer[0], 0x5a);
316 out_8(&p->frame_buffer[1], 0xc7);
317 invalid_vram_cache(&p->frame_buffer[0]);
319 bank1 = (in_8(&p->frame_buffer[0]) == 0x5a)
320 && (in_8(&p->frame_buffer[1]) == 0xc7);
327 p->control_use_bank2 = 1;
329 p->frame_buffer += 0x600000;
330 p->frame_buffer_phys += 0x600000;
344 p->total_vram = (bank1 + bank2) * 0x200000;
346 printk(KERN_INFO "controlfb: VRAM Total = %dMB "
347 "(%dMB @ bank 1, %dMB @ bank 2)\n",
348 (bank1 + bank2) << 1, bank1 << 1, bank2 << 1);
352 * Get the monitor sense value.
353 * Note that this can be called before calibrate_delay,
354 * so we can't use udelay.
356 static int read_control_sense(struct fb_info_control *p)
360 out_le32(CNTRL_REG(p,mon_sense), 7); /* drive all lines high */
362 out_le32(CNTRL_REG(p,mon_sense), 077); /* turn off drivers */
364 sense = (in_le32(CNTRL_REG(p,mon_sense)) & 0x1c0) << 2;
366 /* drive each sense line low in turn and collect the other 2 */
367 out_le32(CNTRL_REG(p,mon_sense), 033); /* drive A low */
369 sense |= (in_le32(CNTRL_REG(p,mon_sense)) & 0xc0) >> 2;
370 out_le32(CNTRL_REG(p,mon_sense), 055); /* drive B low */
372 sense |= ((in_le32(CNTRL_REG(p,mon_sense)) & 0x100) >> 5)
373 | ((in_le32(CNTRL_REG(p,mon_sense)) & 0x40) >> 4);
374 out_le32(CNTRL_REG(p,mon_sense), 066); /* drive C low */
376 sense |= (in_le32(CNTRL_REG(p,mon_sense)) & 0x180) >> 7;
378 out_le32(CNTRL_REG(p,mon_sense), 077); /* turn off drivers */
383 /********************** Various translation functions **********************/
385 #define CONTROL_PIXCLOCK_BASE 256016
386 #define CONTROL_PIXCLOCK_MIN 5000 /* ~ 200 MHz dot clock */
389 * calculate the clock paramaters to be sent to CUDA according to given
390 * pixclock in pico second.
392 static int calc_clock_params(unsigned long clk, unsigned char *param)
394 unsigned long p0, p1, p2, k, l, m, n, min;
396 if (clk > (CONTROL_PIXCLOCK_BASE << 3))
399 p2 = ((clk << 4) < CONTROL_PIXCLOCK_BASE)? 3: 2;
403 for (k = 1, min = l; k < 32; k++) {
406 m = CONTROL_PIXCLOCK_BASE * k;
409 if (n && (n < 128) && rem < min) {
427 * This routine takes a user-supplied var, and picks the best vmode/cmode
431 static int control_var_to_par(struct fb_var_screeninfo *var,
432 struct fb_par_control *par, const struct fb_info *fb_info)
434 int cmode, piped_diff, hstep;
435 unsigned hperiod, hssync, hsblank, hesync, heblank, piped, heq, hlfln,
436 hserr, vperiod, vssync, vesync, veblank, vsblank, vswin, vewin;
437 unsigned long pixclock;
438 struct fb_info_control *p =
439 container_of(fb_info, struct fb_info_control, info);
440 struct control_regvals *r = &par->regvals;
442 switch (var->bits_per_pixel) {
444 par->cmode = CMODE_8;
445 if (p->total_vram > 0x200000) {
447 r->radacal_ctrl = 0x20;
451 r->radacal_ctrl = 0x10;
457 par->cmode = CMODE_16;
458 if (p->total_vram > 0x200000) {
460 r->radacal_ctrl = 0x24;
464 r->radacal_ctrl = 0x14;
469 par->cmode = CMODE_32;
470 if (p->total_vram > 0x200000) {
472 r->radacal_ctrl = 0x28;
475 r->radacal_ctrl = 0x18;
484 * adjust xres and vxres so that the corresponding memory widths are
487 hstep = 31 >> par->cmode;
488 par->xres = (var->xres + hstep) & ~hstep;
489 par->vxres = (var->xres_virtual + hstep) & ~hstep;
490 par->xoffset = (var->xoffset + hstep) & ~hstep;
491 if (par->vxres < par->xres)
492 par->vxres = par->xres;
493 par->pitch = par->vxres << par->cmode;
495 par->yres = var->yres;
496 par->vyres = var->yres_virtual;
497 par->yoffset = var->yoffset;
498 if (par->vyres < par->yres)
499 par->vyres = par->yres;
501 par->sync = var->sync;
503 if (par->pitch * par->vyres + CTRLFB_OFF > p->total_vram)
506 if (par->xoffset + par->xres > par->vxres)
507 par->xoffset = par->vxres - par->xres;
508 if (par->yoffset + par->yres > par->vyres)
509 par->yoffset = par->vyres - par->yres;
511 pixclock = (var->pixclock < CONTROL_PIXCLOCK_MIN)? CONTROL_PIXCLOCK_MIN:
513 if (calc_clock_params(pixclock, r->clock_params))
516 hperiod = ((var->left_margin + par->xres + var->right_margin
517 + var->hsync_len) >> 1) - 2;
518 hssync = hperiod + 1;
519 hsblank = hssync - (var->right_margin >> 1);
520 hesync = (var->hsync_len >> 1) - 1;
521 heblank = (var->left_margin >> 1) + hesync;
522 piped = heblank - piped_diff;
523 heq = var->hsync_len >> 2;
524 hlfln = (hperiod+2) >> 1;
525 hserr = hssync-hesync;
526 vperiod = (var->vsync_len + var->lower_margin + par->yres
527 + var->upper_margin) << 1;
528 vssync = vperiod - 2;
529 vesync = (var->vsync_len << 1) - vperiod + vssync;
530 veblank = (var->upper_margin << 1) + vesync;
531 vsblank = vssync - (var->lower_margin << 1);
532 vswin = (vsblank+vssync) >> 1;
533 vewin = (vesync+veblank) >> 1;
536 r->regs[1] = vsblank;
537 r->regs[2] = veblank;
541 r->regs[6] = vperiod;
543 r->regs[8] = hperiod;
544 r->regs[9] = hsblank;
545 r->regs[10] = heblank;
546 r->regs[11] = hesync;
547 r->regs[12] = hssync;
552 if (par->xres >= 1280 && par->cmode >= CMODE_16)
557 if (mac_var_to_vmode(var, &par->vmode, &cmode))
565 * Convert hardware data in par to an fb_var_screeninfo
568 static void control_par_to_var(struct fb_par_control *par, struct fb_var_screeninfo *var)
570 struct control_regints *rv;
572 rv = (struct control_regints *) par->regvals.regs;
574 memset(var, 0, sizeof(*var));
575 var->xres = par->xres;
576 var->yres = par->yres;
577 var->xres_virtual = par->vxres;
578 var->yres_virtual = par->vyres;
579 var->xoffset = par->xoffset;
580 var->yoffset = par->yoffset;
585 var->bits_per_pixel = 8;
587 var->green.length = 8;
588 var->blue.length = 8;
590 case CMODE_16: /* RGB 555 */
591 var->bits_per_pixel = 16;
592 var->red.offset = 10;
594 var->green.offset = 5;
595 var->green.length = 5;
596 var->blue.length = 5;
598 case CMODE_32: /* RGB 888 */
599 var->bits_per_pixel = 32;
600 var->red.offset = 16;
602 var->green.offset = 8;
603 var->green.length = 8;
604 var->blue.length = 8;
605 var->transp.offset = 24;
606 var->transp.length = 8;
611 var->vmode = FB_VMODE_NONINTERLACED;
613 var->left_margin = (rv->heblank - rv->hesync) << 1;
614 var->right_margin = (rv->hssync - rv->hsblank) << 1;
615 var->hsync_len = (rv->hperiod + 2 - rv->hssync + rv->hesync) << 1;
617 var->upper_margin = (rv->veblank - rv->vesync) >> 1;
618 var->lower_margin = (rv->vssync - rv->vsblank) >> 1;
619 var->vsync_len = (rv->vperiod - rv->vssync + rv->vesync) >> 1;
621 var->sync = par->sync;
624 * 10^12 * clock_params[0] / (3906400 * clock_params[1]
625 * * 2^clock_params[2])
626 * (10^12 * clock_params[0] / (3906400 * clock_params[1]))
629 /* (255990.17 * clock_params[0] / clock_params[1]) >> clock_params[2] */
630 var->pixclock = CONTROL_PIXCLOCK_BASE * par->regvals.clock_params[0];
631 var->pixclock /= par->regvals.clock_params[1];
632 var->pixclock >>= par->regvals.clock_params[2];
635 /******************** The functions for controlfb_ops ********************/
638 * Checks a var structure
640 static int controlfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info)
642 struct fb_par_control par;
645 err = control_var_to_par(var, &par, info);
648 control_par_to_var(&par, var);
654 * Applies current var to display
656 static int controlfb_set_par (struct fb_info *info)
658 struct fb_info_control *p =
659 container_of(info, struct fb_info_control, info);
660 struct fb_par_control par;
663 if((err = control_var_to_par(&info->var, &par, info))) {
664 printk (KERN_ERR "controlfb_set_par: error calling"
665 " control_var_to_par: %d.\n", err);
669 control_set_hardware(p, &par);
671 info->fix.visual = (p->par.cmode == CMODE_8) ?
672 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
673 info->fix.line_length = p->par.pitch;
674 info->fix.xpanstep = 32 >> p->par.cmode;
675 info->fix.ypanstep = 1;
680 static int controlfb_pan_display(struct fb_var_screeninfo *var,
681 struct fb_info *info)
683 unsigned int xoffset, hstep;
684 struct fb_info_control *p =
685 container_of(info, struct fb_info_control, info);
686 struct fb_par_control *par = &p->par;
689 * make sure start addr will be 32-byte aligned
691 hstep = 0x1f >> par->cmode;
692 xoffset = (var->xoffset + hstep) & ~hstep;
694 if (xoffset+par->xres > par->vxres ||
695 var->yoffset+par->yres > par->vyres)
698 set_screen_start(xoffset, var->yoffset, p);
703 static int controlfb_blank(int blank_mode, struct fb_info *info)
705 struct fb_info_control __maybe_unused *p =
706 container_of(info, struct fb_info_control, info);
709 ctrl = in_le32(CNTRL_REG(p, ctrl));
711 switch (blank_mode) {
712 case FB_BLANK_VSYNC_SUSPEND:
715 case FB_BLANK_HSYNC_SUSPEND:
718 case FB_BLANK_POWERDOWN:
721 case FB_BLANK_NORMAL:
731 out_le32(CNTRL_REG(p,ctrl), ctrl);
737 * Private mmap since we want to have a different caching on the framebuffer
739 * Note there's no locking in here; it's done in fb_mmap() in fbmem.c.
741 static int controlfb_mmap(struct fb_info *info,
742 struct vm_area_struct *vma)
744 unsigned long mmio_pgoff;
748 start = info->fix.smem_start;
749 len = info->fix.smem_len;
750 mmio_pgoff = PAGE_ALIGN((start & ~PAGE_MASK) + len) >> PAGE_SHIFT;
751 if (vma->vm_pgoff >= mmio_pgoff) {
752 if (info->var.accel_flags)
754 vma->vm_pgoff -= mmio_pgoff;
755 start = info->fix.mmio_start;
756 len = info->fix.mmio_len;
757 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
760 vma->vm_page_prot = pgprot_cached_wthru(vma->vm_page_prot);
763 return vm_iomap_memory(vma, start, len);
766 static const struct fb_ops controlfb_ops = {
767 .owner = THIS_MODULE,
768 .fb_check_var = controlfb_check_var,
769 .fb_set_par = controlfb_set_par,
770 .fb_setcolreg = controlfb_setcolreg,
771 .fb_pan_display = controlfb_pan_display,
772 .fb_blank = controlfb_blank,
773 .fb_mmap = controlfb_mmap,
774 .fb_fillrect = cfb_fillrect,
775 .fb_copyarea = cfb_copyarea,
776 .fb_imageblit = cfb_imageblit,
780 * Set misc info vars for this driver
782 static void __init control_init_info(struct fb_info *info, struct fb_info_control *p)
786 info->fbops = &controlfb_ops;
787 info->pseudo_palette = p->pseudo_palette;
788 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
789 info->screen_base = p->frame_buffer + CTRLFB_OFF;
791 fb_alloc_cmap(&info->cmap, 256, 0);
793 /* Fill fix common fields */
794 strcpy(info->fix.id, "control");
795 info->fix.mmio_start = p->control_regs_phys;
796 info->fix.mmio_len = sizeof(struct control_regs);
797 info->fix.type = FB_TYPE_PACKED_PIXELS;
798 info->fix.smem_start = p->frame_buffer_phys + CTRLFB_OFF;
799 info->fix.smem_len = p->total_vram - CTRLFB_OFF;
800 info->fix.ywrapstep = 0;
801 info->fix.type_aux = 0;
802 info->fix.accel = FB_ACCEL_NONE;
806 * Parse user specified options (`video=controlfb:')
808 static void __init control_setup(char *options)
812 if (!options || !*options)
815 while ((this_opt = strsep(&options, ",")) != NULL) {
816 if (!strncmp(this_opt, "vmode:", 6)) {
817 int vmode = simple_strtoul(this_opt+6, NULL, 0);
818 if (vmode > 0 && vmode <= VMODE_MAX &&
819 control_mac_modes[vmode - 1].m[1] >= 0)
820 default_vmode = vmode;
821 } else if (!strncmp(this_opt, "cmode:", 6)) {
822 int depth = simple_strtoul(this_opt+6, NULL, 0);
827 default_cmode = depth;
830 default_cmode = CMODE_8;
834 default_cmode = CMODE_16;
838 default_cmode = CMODE_32;
846 * finish off the driver initialization and register
848 static int __init init_control(struct fb_info_control *p)
850 int full, sense, vmode, cmode, vyres;
851 struct fb_var_screeninfo var;
854 printk(KERN_INFO "controlfb: ");
856 full = p->total_vram == 0x400000;
858 /* Try to pick a video mode out of NVRAM if we have one. */
859 cmode = default_cmode;
860 if (IS_REACHABLE(CONFIG_NVRAM) && cmode == CMODE_NVRAM)
861 cmode = nvram_read_byte(NV_CMODE);
862 if (cmode < CMODE_8 || cmode > CMODE_32)
865 vmode = default_vmode;
866 if (IS_REACHABLE(CONFIG_NVRAM) && vmode == VMODE_NVRAM)
867 vmode = nvram_read_byte(NV_VMODE);
868 if (vmode < 1 || vmode > VMODE_MAX ||
869 control_mac_modes[vmode - 1].m[full] < cmode) {
870 sense = read_control_sense(p);
871 printk(KERN_CONT "Monitor sense value = 0x%x, ", sense);
872 vmode = mac_map_monitor_sense(sense);
873 if (control_mac_modes[vmode - 1].m[full] < 0)
874 vmode = VMODE_640_480_60;
875 cmode = min(cmode, control_mac_modes[vmode - 1].m[full]);
878 /* Initialize info structure */
879 control_init_info(&p->info, p);
881 /* Setup default var */
882 if (mac_vmode_to_var(vmode, cmode, &var) < 0) {
883 /* This shouldn't happen! */
884 printk("mac_vmode_to_var(%d, %d,) failed\n", vmode, cmode);
886 vmode = VMODE_640_480_60;
888 if (mac_vmode_to_var(vmode, cmode, &var) < 0) {
889 printk(KERN_ERR "controlfb: mac_vmode_to_var() failed\n");
892 printk(KERN_INFO "controlfb: ");
894 printk("using video mode %d and color mode %d.\n", vmode, cmode);
896 vyres = (p->total_vram - CTRLFB_OFF) / (var.xres << cmode);
897 if (vyres > var.yres)
898 var.yres_virtual = vyres;
900 /* Apply default var */
901 var.activate = FB_ACTIVATE_NOW;
902 rc = fb_set_var(&p->info, &var);
903 if (rc && (vmode != VMODE_640_480_60 || cmode != CMODE_8))
906 /* Register with fbdev layer */
907 if (register_framebuffer(&p->info) < 0)
910 fb_info(&p->info, "control display adapter\n");
915 static void control_cleanup(void)
917 struct fb_info_control *p = control_fb;
923 iounmap(p->cmap_regs);
925 iounmap(p->control_regs);
926 if (p->frame_buffer) {
927 if (p->control_use_bank2)
928 p->frame_buffer -= 0x600000;
929 iounmap(p->frame_buffer);
931 if (p->cmap_regs_phys)
932 release_mem_region(p->cmap_regs_phys, 0x1000);
933 if (p->control_regs_phys)
934 release_mem_region(p->control_regs_phys, p->control_regs_size);
936 release_mem_region(p->fb_orig_base, p->fb_orig_size);
941 * find "control" and initialize
943 static int __init control_of_init(struct device_node *dp)
945 struct fb_info_control *p;
946 struct resource fb_res, reg_res;
949 printk(KERN_ERR "controlfb: only one control is supported\n");
953 if (of_pci_address_to_resource(dp, 2, &fb_res) ||
954 of_pci_address_to_resource(dp, 1, ®_res)) {
955 printk(KERN_ERR "can't get 2 addresses for control\n");
958 p = kzalloc(sizeof(*p), GFP_KERNEL);
961 control_fb = p; /* save it for cleanups */
963 /* Map in frame buffer and registers */
964 p->fb_orig_base = fb_res.start;
965 p->fb_orig_size = resource_size(&fb_res);
966 /* use the big-endian aperture (??) */
967 p->frame_buffer_phys = fb_res.start + 0x800000;
968 p->control_regs_phys = reg_res.start;
969 p->control_regs_size = resource_size(®_res);
971 if (!p->fb_orig_base ||
972 !request_mem_region(p->fb_orig_base,p->fb_orig_size,"controlfb")) {
976 /* map at most 8MB for the frame buffer */
977 p->frame_buffer = ioremap_wt(p->frame_buffer_phys, 0x800000);
979 if (!p->control_regs_phys ||
980 !request_mem_region(p->control_regs_phys, p->control_regs_size,
982 p->control_regs_phys = 0;
985 p->control_regs = ioremap(p->control_regs_phys, p->control_regs_size);
987 p->cmap_regs_phys = 0xf301b000; /* XXX not in prom? */
988 if (!request_mem_region(p->cmap_regs_phys, 0x1000, "controlfb cmap")) {
989 p->cmap_regs_phys = 0;
992 p->cmap_regs = ioremap(p->cmap_regs_phys, 0x1000);
994 if (!p->cmap_regs || !p->control_regs || !p->frame_buffer)
1001 if (init_control(p) < 0)
1011 static int __init control_init(void)
1013 struct device_node *dp;
1014 char *option = NULL;
1017 if (fb_get_options("controlfb", &option))
1019 control_setup(option);
1021 dp = of_find_node_by_name(NULL, "control");
1022 if (dp && !control_of_init(dp))
1029 device_initcall(control_init);