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_BOOTX_TEXT
51 #include <asm/btext.h>
55 #include "controlfb.h"
57 #if !defined(CONFIG_PPC_PMAC) || !defined(CONFIG_PPC32)
58 #define invalid_vram_cache(addr)
64 #define out_8(addr, val) (void)(val)
65 #define in_le32(addr) 0
66 #define out_le32(addr, val) (void)(val)
67 #ifndef pgprot_cached_wthru
68 #define pgprot_cached_wthru(prot) (prot)
71 static void invalid_vram_cache(void __force *addr)
82 struct fb_par_control {
88 struct control_regvals regvals;
93 #define DIRTY(z) ((x)->z != (y)->z)
94 #define DIRTY_CMAP(z) (memcmp(&((x)->z), &((y)->z), sizeof((y)->z)))
95 static inline int PAR_EQUAL(struct fb_par_control *x, struct fb_par_control *y)
100 for (i = 0; i < 3; i++)
101 results &= !DIRTY(regvals.clock_params[i]);
104 for (i = 0; i < 16; i++)
105 results &= !DIRTY(regvals.regs[i]);
108 return (!DIRTY(cmode) && !DIRTY(xres) && !DIRTY(yres)
109 && !DIRTY(vxres) && !DIRTY(vyres));
111 static inline int VAR_MATCH(struct fb_var_screeninfo *x, struct fb_var_screeninfo *y)
113 return (!DIRTY(bits_per_pixel) && !DIRTY(xres)
114 && !DIRTY(yres) && !DIRTY(xres_virtual)
115 && !DIRTY(yres_virtual)
116 && !DIRTY_CMAP(red) && !DIRTY_CMAP(green) && !DIRTY_CMAP(blue));
119 struct fb_info_control {
121 struct fb_par_control par;
122 u32 pseudo_palette[16];
124 struct cmap_regs __iomem *cmap_regs;
125 unsigned long cmap_regs_phys;
127 struct control_regs __iomem *control_regs;
128 unsigned long control_regs_phys;
129 unsigned long control_regs_size;
131 __u8 __iomem *frame_buffer;
132 unsigned long frame_buffer_phys;
133 unsigned long fb_orig_base;
134 unsigned long fb_orig_size;
136 int control_use_bank2;
137 unsigned long total_vram;
138 unsigned char vram_attr;
141 /* control register access macro */
142 #define CNTRL_REG(INFO,REG) (&(((INFO)->control_regs->REG).r))
145 /************************** Internal variables *******************************/
147 static struct fb_info_control *control_fb;
149 static int default_vmode __initdata = VMODE_NVRAM;
150 static int default_cmode __initdata = CMODE_NVRAM;
153 static int controlfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
154 u_int transp, struct fb_info *info)
156 struct fb_info_control *p =
157 container_of(info, struct fb_info_control, info);
167 out_8(&p->cmap_regs->addr, regno); /* tell clut what addr to fill */
168 out_8(&p->cmap_regs->lut, r); /* send one color channel at */
169 out_8(&p->cmap_regs->lut, g); /* a time... */
170 out_8(&p->cmap_regs->lut, b);
174 switch (p->par.cmode) {
176 p->pseudo_palette[regno] =
177 (regno << 10) | (regno << 5) | regno;
180 i = (regno << 8) | regno;
181 p->pseudo_palette[regno] = (i << 16) | i;
190 /******************** End of controlfb_ops implementation ******************/
194 static void set_control_clock(unsigned char *params)
196 #ifdef CONFIG_ADB_CUDA
197 struct adb_request req;
200 for (i = 0; i < 3; ++i) {
201 cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_GET_SET_IIC,
202 0x50, i + 1, params[i]);
203 while (!req.complete)
210 * Set screen start address according to var offset values
212 static inline void set_screen_start(int xoffset, int yoffset,
213 struct fb_info_control *p)
215 struct fb_par_control *par = &p->par;
217 par->xoffset = xoffset;
218 par->yoffset = yoffset;
219 out_le32(CNTRL_REG(p,start_addr),
220 par->yoffset * par->pitch + (par->xoffset << par->cmode));
223 #define RADACAL_WRITE(a,d) \
224 out_8(&p->cmap_regs->addr, (a)); \
225 out_8(&p->cmap_regs->dat, (d))
227 /* Now how about actually saying, Make it so! */
228 /* Some things in here probably don't need to be done each time. */
229 static void control_set_hardware(struct fb_info_control *p, struct fb_par_control *par)
231 struct control_regvals *r;
232 volatile struct preg __iomem *rp;
235 if (PAR_EQUAL(&p->par, par)) {
237 * check if only xoffset or yoffset differs.
238 * this prevents flickers in typical VT switch case.
240 if (p->par.xoffset != par->xoffset ||
241 p->par.yoffset != par->yoffset)
242 set_screen_start(par->xoffset, par->yoffset, p);
248 cmode = p->par.cmode;
251 /* Turn off display */
252 out_le32(CNTRL_REG(p,ctrl), 0x400 | par->ctrl);
254 set_control_clock(r->clock_params);
256 RADACAL_WRITE(0x20, r->radacal_ctrl);
257 RADACAL_WRITE(0x21, p->control_use_bank2 ? 0 : 1);
258 RADACAL_WRITE(0x10, 0);
259 RADACAL_WRITE(0x11, 0);
261 rp = &p->control_regs->vswin;
262 for (i = 0; i < 16; ++i, ++rp)
263 out_le32(&rp->r, r->regs[i]);
265 out_le32(CNTRL_REG(p,pitch), par->pitch);
266 out_le32(CNTRL_REG(p,mode), r->mode);
267 out_le32(CNTRL_REG(p,vram_attr), p->vram_attr);
268 out_le32(CNTRL_REG(p,start_addr), par->yoffset * par->pitch
269 + (par->xoffset << cmode));
270 out_le32(CNTRL_REG(p,rfrcnt), 0x1e5);
271 out_le32(CNTRL_REG(p,intr_ena), 0);
273 /* Turn on display */
274 out_le32(CNTRL_REG(p,ctrl), par->ctrl);
276 #ifdef CONFIG_BOOTX_TEXT
277 btext_update_display(p->frame_buffer_phys + CTRLFB_OFF,
278 p->par.xres, p->par.yres,
279 (cmode == CMODE_32? 32: cmode == CMODE_16? 16: 8),
281 #endif /* CONFIG_BOOTX_TEXT */
284 /* Work out which banks of VRAM we have installed. */
285 /* danj: I guess the card just ignores writes to nonexistant VRAM... */
287 static void __init find_vram_size(struct fb_info_control *p)
292 * Set VRAM in 2MB (bank 1) mode
293 * VRAM Bank 2 will be accessible through offset 0x600000 if present
294 * and VRAM Bank 1 will not respond at that offset even if present
296 out_le32(CNTRL_REG(p,vram_attr), 0x31);
298 out_8(&p->frame_buffer[0x600000], 0xb3);
299 out_8(&p->frame_buffer[0x600001], 0x71);
300 invalid_vram_cache(&p->frame_buffer[0x600000]);
302 bank2 = (in_8(&p->frame_buffer[0x600000]) == 0xb3)
303 && (in_8(&p->frame_buffer[0x600001]) == 0x71);
306 * Set VRAM in 2MB (bank 2) mode
307 * VRAM Bank 1 will be accessible through offset 0x000000 if present
308 * and VRAM Bank 2 will not respond at that offset even if present
310 out_le32(CNTRL_REG(p,vram_attr), 0x39);
312 out_8(&p->frame_buffer[0], 0x5a);
313 out_8(&p->frame_buffer[1], 0xc7);
314 invalid_vram_cache(&p->frame_buffer[0]);
316 bank1 = (in_8(&p->frame_buffer[0]) == 0x5a)
317 && (in_8(&p->frame_buffer[1]) == 0xc7);
324 p->control_use_bank2 = 1;
326 p->frame_buffer += 0x600000;
327 p->frame_buffer_phys += 0x600000;
341 p->total_vram = (bank1 + bank2) * 0x200000;
343 printk(KERN_INFO "controlfb: VRAM Total = %dMB "
344 "(%dMB @ bank 1, %dMB @ bank 2)\n",
345 (bank1 + bank2) << 1, bank1 << 1, bank2 << 1);
349 * Get the monitor sense value.
350 * Note that this can be called before calibrate_delay,
351 * so we can't use udelay.
353 static int read_control_sense(struct fb_info_control *p)
357 out_le32(CNTRL_REG(p,mon_sense), 7); /* drive all lines high */
359 out_le32(CNTRL_REG(p,mon_sense), 077); /* turn off drivers */
361 sense = (in_le32(CNTRL_REG(p,mon_sense)) & 0x1c0) << 2;
363 /* drive each sense line low in turn and collect the other 2 */
364 out_le32(CNTRL_REG(p,mon_sense), 033); /* drive A low */
366 sense |= (in_le32(CNTRL_REG(p,mon_sense)) & 0xc0) >> 2;
367 out_le32(CNTRL_REG(p,mon_sense), 055); /* drive B low */
369 sense |= ((in_le32(CNTRL_REG(p,mon_sense)) & 0x100) >> 5)
370 | ((in_le32(CNTRL_REG(p,mon_sense)) & 0x40) >> 4);
371 out_le32(CNTRL_REG(p,mon_sense), 066); /* drive C low */
373 sense |= (in_le32(CNTRL_REG(p,mon_sense)) & 0x180) >> 7;
375 out_le32(CNTRL_REG(p,mon_sense), 077); /* turn off drivers */
380 /********************** Various translation functions **********************/
382 #define CONTROL_PIXCLOCK_BASE 256016
383 #define CONTROL_PIXCLOCK_MIN 5000 /* ~ 200 MHz dot clock */
386 * calculate the clock paramaters to be sent to CUDA according to given
387 * pixclock in pico second.
389 static int calc_clock_params(unsigned long clk, unsigned char *param)
391 unsigned long p0, p1, p2, k, l, m, n, min;
393 if (clk > (CONTROL_PIXCLOCK_BASE << 3))
396 p2 = ((clk << 4) < CONTROL_PIXCLOCK_BASE)? 3: 2;
400 for (k = 1, min = l; k < 32; k++) {
403 m = CONTROL_PIXCLOCK_BASE * k;
406 if (n && (n < 128) && rem < min) {
424 * This routine takes a user-supplied var, and picks the best vmode/cmode
428 static int control_var_to_par(struct fb_var_screeninfo *var,
429 struct fb_par_control *par, const struct fb_info *fb_info)
431 int cmode, piped_diff, hstep;
432 unsigned hperiod, hssync, hsblank, hesync, heblank, piped, heq, hlfln,
433 hserr, vperiod, vssync, vesync, veblank, vsblank, vswin, vewin;
434 unsigned long pixclock;
435 struct fb_info_control *p =
436 container_of(fb_info, struct fb_info_control, info);
437 struct control_regvals *r = &par->regvals;
439 switch (var->bits_per_pixel) {
441 par->cmode = CMODE_8;
442 if (p->total_vram > 0x200000) {
444 r->radacal_ctrl = 0x20;
448 r->radacal_ctrl = 0x10;
454 par->cmode = CMODE_16;
455 if (p->total_vram > 0x200000) {
457 r->radacal_ctrl = 0x24;
461 r->radacal_ctrl = 0x14;
466 par->cmode = CMODE_32;
467 if (p->total_vram > 0x200000) {
469 r->radacal_ctrl = 0x28;
472 r->radacal_ctrl = 0x18;
481 * adjust xres and vxres so that the corresponding memory widths are
484 hstep = 31 >> par->cmode;
485 par->xres = (var->xres + hstep) & ~hstep;
486 par->vxres = (var->xres_virtual + hstep) & ~hstep;
487 par->xoffset = (var->xoffset + hstep) & ~hstep;
488 if (par->vxres < par->xres)
489 par->vxres = par->xres;
490 par->pitch = par->vxres << par->cmode;
492 par->yres = var->yres;
493 par->vyres = var->yres_virtual;
494 par->yoffset = var->yoffset;
495 if (par->vyres < par->yres)
496 par->vyres = par->yres;
498 par->sync = var->sync;
500 if (par->pitch * par->vyres + CTRLFB_OFF > p->total_vram)
503 if (par->xoffset + par->xres > par->vxres)
504 par->xoffset = par->vxres - par->xres;
505 if (par->yoffset + par->yres > par->vyres)
506 par->yoffset = par->vyres - par->yres;
508 pixclock = (var->pixclock < CONTROL_PIXCLOCK_MIN)? CONTROL_PIXCLOCK_MIN:
510 if (calc_clock_params(pixclock, r->clock_params))
513 hperiod = ((var->left_margin + par->xres + var->right_margin
514 + var->hsync_len) >> 1) - 2;
515 hssync = hperiod + 1;
516 hsblank = hssync - (var->right_margin >> 1);
517 hesync = (var->hsync_len >> 1) - 1;
518 heblank = (var->left_margin >> 1) + hesync;
519 piped = heblank - piped_diff;
520 heq = var->hsync_len >> 2;
521 hlfln = (hperiod+2) >> 1;
522 hserr = hssync-hesync;
523 vperiod = (var->vsync_len + var->lower_margin + par->yres
524 + var->upper_margin) << 1;
525 vssync = vperiod - 2;
526 vesync = (var->vsync_len << 1) - vperiod + vssync;
527 veblank = (var->upper_margin << 1) + vesync;
528 vsblank = vssync - (var->lower_margin << 1);
529 vswin = (vsblank+vssync) >> 1;
530 vewin = (vesync+veblank) >> 1;
533 r->regs[1] = vsblank;
534 r->regs[2] = veblank;
538 r->regs[6] = vperiod;
540 r->regs[8] = hperiod;
541 r->regs[9] = hsblank;
542 r->regs[10] = heblank;
543 r->regs[11] = hesync;
544 r->regs[12] = hssync;
549 if (par->xres >= 1280 && par->cmode >= CMODE_16)
554 if (mac_var_to_vmode(var, &par->vmode, &cmode))
562 * Convert hardware data in par to an fb_var_screeninfo
565 static void control_par_to_var(struct fb_par_control *par, struct fb_var_screeninfo *var)
567 struct control_regints *rv;
569 rv = (struct control_regints *) par->regvals.regs;
571 memset(var, 0, sizeof(*var));
572 var->xres = par->xres;
573 var->yres = par->yres;
574 var->xres_virtual = par->vxres;
575 var->yres_virtual = par->vyres;
576 var->xoffset = par->xoffset;
577 var->yoffset = par->yoffset;
582 var->bits_per_pixel = 8;
584 var->green.length = 8;
585 var->blue.length = 8;
587 case CMODE_16: /* RGB 555 */
588 var->bits_per_pixel = 16;
589 var->red.offset = 10;
591 var->green.offset = 5;
592 var->green.length = 5;
593 var->blue.length = 5;
595 case CMODE_32: /* RGB 888 */
596 var->bits_per_pixel = 32;
597 var->red.offset = 16;
599 var->green.offset = 8;
600 var->green.length = 8;
601 var->blue.length = 8;
602 var->transp.offset = 24;
603 var->transp.length = 8;
608 var->vmode = FB_VMODE_NONINTERLACED;
610 var->left_margin = (rv->heblank - rv->hesync) << 1;
611 var->right_margin = (rv->hssync - rv->hsblank) << 1;
612 var->hsync_len = (rv->hperiod + 2 - rv->hssync + rv->hesync) << 1;
614 var->upper_margin = (rv->veblank - rv->vesync) >> 1;
615 var->lower_margin = (rv->vssync - rv->vsblank) >> 1;
616 var->vsync_len = (rv->vperiod - rv->vssync + rv->vesync) >> 1;
618 var->sync = par->sync;
621 * 10^12 * clock_params[0] / (3906400 * clock_params[1]
622 * * 2^clock_params[2])
623 * (10^12 * clock_params[0] / (3906400 * clock_params[1]))
626 /* (255990.17 * clock_params[0] / clock_params[1]) >> clock_params[2] */
627 var->pixclock = CONTROL_PIXCLOCK_BASE * par->regvals.clock_params[0];
628 var->pixclock /= par->regvals.clock_params[1];
629 var->pixclock >>= par->regvals.clock_params[2];
632 /******************** The functions for controlfb_ops ********************/
635 * Checks a var structure
637 static int controlfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info)
639 struct fb_par_control par;
642 err = control_var_to_par(var, &par, info);
645 control_par_to_var(&par, var);
651 * Applies current var to display
653 static int controlfb_set_par (struct fb_info *info)
655 struct fb_info_control *p =
656 container_of(info, struct fb_info_control, info);
657 struct fb_par_control par;
660 if((err = control_var_to_par(&info->var, &par, info))) {
661 printk (KERN_ERR "controlfb_set_par: error calling"
662 " control_var_to_par: %d.\n", err);
666 control_set_hardware(p, &par);
668 info->fix.visual = (p->par.cmode == CMODE_8) ?
669 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
670 info->fix.line_length = p->par.pitch;
671 info->fix.xpanstep = 32 >> p->par.cmode;
672 info->fix.ypanstep = 1;
677 static int controlfb_pan_display(struct fb_var_screeninfo *var,
678 struct fb_info *info)
680 unsigned int xoffset, hstep;
681 struct fb_info_control *p =
682 container_of(info, struct fb_info_control, info);
683 struct fb_par_control *par = &p->par;
686 * make sure start addr will be 32-byte aligned
688 hstep = 0x1f >> par->cmode;
689 xoffset = (var->xoffset + hstep) & ~hstep;
691 if (xoffset+par->xres > par->vxres ||
692 var->yoffset+par->yres > par->vyres)
695 set_screen_start(xoffset, var->yoffset, p);
700 static int controlfb_blank(int blank_mode, struct fb_info *info)
702 struct fb_info_control __maybe_unused *p =
703 container_of(info, struct fb_info_control, info);
706 ctrl = in_le32(CNTRL_REG(p, ctrl));
708 switch (blank_mode) {
709 case FB_BLANK_VSYNC_SUSPEND:
712 case FB_BLANK_HSYNC_SUSPEND:
715 case FB_BLANK_POWERDOWN:
718 case FB_BLANK_NORMAL:
728 out_le32(CNTRL_REG(p,ctrl), ctrl);
734 * Private mmap since we want to have a different caching on the framebuffer
736 * Note there's no locking in here; it's done in fb_mmap() in fbmem.c.
738 static int controlfb_mmap(struct fb_info *info,
739 struct vm_area_struct *vma)
741 unsigned long mmio_pgoff;
745 start = info->fix.smem_start;
746 len = info->fix.smem_len;
747 mmio_pgoff = PAGE_ALIGN((start & ~PAGE_MASK) + len) >> PAGE_SHIFT;
748 if (vma->vm_pgoff >= mmio_pgoff) {
749 if (info->var.accel_flags)
751 vma->vm_pgoff -= mmio_pgoff;
752 start = info->fix.mmio_start;
753 len = info->fix.mmio_len;
754 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
757 vma->vm_page_prot = pgprot_cached_wthru(vma->vm_page_prot);
760 return vm_iomap_memory(vma, start, len);
763 static const struct fb_ops controlfb_ops = {
764 .owner = THIS_MODULE,
765 .fb_check_var = controlfb_check_var,
766 .fb_set_par = controlfb_set_par,
767 .fb_setcolreg = controlfb_setcolreg,
768 .fb_pan_display = controlfb_pan_display,
769 .fb_blank = controlfb_blank,
770 .fb_mmap = controlfb_mmap,
771 .fb_fillrect = cfb_fillrect,
772 .fb_copyarea = cfb_copyarea,
773 .fb_imageblit = cfb_imageblit,
777 * Set misc info vars for this driver
779 static void __init control_init_info(struct fb_info *info, struct fb_info_control *p)
783 info->fbops = &controlfb_ops;
784 info->pseudo_palette = p->pseudo_palette;
785 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
786 info->screen_base = p->frame_buffer + CTRLFB_OFF;
788 fb_alloc_cmap(&info->cmap, 256, 0);
790 /* Fill fix common fields */
791 strcpy(info->fix.id, "control");
792 info->fix.mmio_start = p->control_regs_phys;
793 info->fix.mmio_len = sizeof(struct control_regs);
794 info->fix.type = FB_TYPE_PACKED_PIXELS;
795 info->fix.smem_start = p->frame_buffer_phys + CTRLFB_OFF;
796 info->fix.smem_len = p->total_vram - CTRLFB_OFF;
797 info->fix.ywrapstep = 0;
798 info->fix.type_aux = 0;
799 info->fix.accel = FB_ACCEL_NONE;
803 * Parse user specified options (`video=controlfb:')
805 static void __init control_setup(char *options)
809 if (!options || !*options)
812 while ((this_opt = strsep(&options, ",")) != NULL) {
813 if (!strncmp(this_opt, "vmode:", 6)) {
814 int vmode = simple_strtoul(this_opt+6, NULL, 0);
815 if (vmode > 0 && vmode <= VMODE_MAX &&
816 control_mac_modes[vmode - 1].m[1] >= 0)
817 default_vmode = vmode;
818 } else if (!strncmp(this_opt, "cmode:", 6)) {
819 int depth = simple_strtoul(this_opt+6, NULL, 0);
824 default_cmode = depth;
827 default_cmode = CMODE_8;
831 default_cmode = CMODE_16;
835 default_cmode = CMODE_32;
843 * finish off the driver initialization and register
845 static int __init init_control(struct fb_info_control *p)
847 int full, sense, vmode, cmode, vyres;
848 struct fb_var_screeninfo var;
851 printk(KERN_INFO "controlfb: ");
853 full = p->total_vram == 0x400000;
855 /* Try to pick a video mode out of NVRAM if we have one. */
856 cmode = default_cmode;
857 if (IS_REACHABLE(CONFIG_NVRAM) && cmode == CMODE_NVRAM)
858 cmode = nvram_read_byte(NV_CMODE);
859 if (cmode < CMODE_8 || cmode > CMODE_32)
862 vmode = default_vmode;
863 if (IS_REACHABLE(CONFIG_NVRAM) && vmode == VMODE_NVRAM)
864 vmode = nvram_read_byte(NV_VMODE);
865 if (vmode < 1 || vmode > VMODE_MAX ||
866 control_mac_modes[vmode - 1].m[full] < cmode) {
867 sense = read_control_sense(p);
868 printk(KERN_CONT "Monitor sense value = 0x%x, ", sense);
869 vmode = mac_map_monitor_sense(sense);
870 if (control_mac_modes[vmode - 1].m[full] < 0)
871 vmode = VMODE_640_480_60;
872 cmode = min(cmode, control_mac_modes[vmode - 1].m[full]);
875 /* Initialize info structure */
876 control_init_info(&p->info, p);
878 /* Setup default var */
879 if (mac_vmode_to_var(vmode, cmode, &var) < 0) {
880 /* This shouldn't happen! */
881 printk("mac_vmode_to_var(%d, %d,) failed\n", vmode, cmode);
883 vmode = VMODE_640_480_60;
885 if (mac_vmode_to_var(vmode, cmode, &var) < 0) {
886 printk(KERN_ERR "controlfb: mac_vmode_to_var() failed\n");
889 printk(KERN_INFO "controlfb: ");
891 printk("using video mode %d and color mode %d.\n", vmode, cmode);
893 vyres = (p->total_vram - CTRLFB_OFF) / (var.xres << cmode);
894 if (vyres > var.yres)
895 var.yres_virtual = vyres;
897 /* Apply default var */
898 var.activate = FB_ACTIVATE_NOW;
899 rc = fb_set_var(&p->info, &var);
900 if (rc && (vmode != VMODE_640_480_60 || cmode != CMODE_8))
903 /* Register with fbdev layer */
904 if (register_framebuffer(&p->info) < 0)
907 fb_info(&p->info, "control display adapter\n");
912 static void control_cleanup(void)
914 struct fb_info_control *p = control_fb;
920 iounmap(p->cmap_regs);
922 iounmap(p->control_regs);
923 if (p->frame_buffer) {
924 if (p->control_use_bank2)
925 p->frame_buffer -= 0x600000;
926 iounmap(p->frame_buffer);
928 if (p->cmap_regs_phys)
929 release_mem_region(p->cmap_regs_phys, 0x1000);
930 if (p->control_regs_phys)
931 release_mem_region(p->control_regs_phys, p->control_regs_size);
933 release_mem_region(p->fb_orig_base, p->fb_orig_size);
938 * find "control" and initialize
940 static int __init control_of_init(struct device_node *dp)
942 struct fb_info_control *p;
943 struct resource fb_res, reg_res;
946 printk(KERN_ERR "controlfb: only one control is supported\n");
950 if (of_pci_address_to_resource(dp, 2, &fb_res) ||
951 of_pci_address_to_resource(dp, 1, ®_res)) {
952 printk(KERN_ERR "can't get 2 addresses for control\n");
955 p = kzalloc(sizeof(*p), GFP_KERNEL);
958 control_fb = p; /* save it for cleanups */
960 /* Map in frame buffer and registers */
961 p->fb_orig_base = fb_res.start;
962 p->fb_orig_size = resource_size(&fb_res);
963 /* use the big-endian aperture (??) */
964 p->frame_buffer_phys = fb_res.start + 0x800000;
965 p->control_regs_phys = reg_res.start;
966 p->control_regs_size = resource_size(®_res);
968 if (!p->fb_orig_base ||
969 !request_mem_region(p->fb_orig_base,p->fb_orig_size,"controlfb")) {
973 /* map at most 8MB for the frame buffer */
974 p->frame_buffer = ioremap_wt(p->frame_buffer_phys, 0x800000);
976 if (!p->control_regs_phys ||
977 !request_mem_region(p->control_regs_phys, p->control_regs_size,
979 p->control_regs_phys = 0;
982 p->control_regs = ioremap(p->control_regs_phys, p->control_regs_size);
984 p->cmap_regs_phys = 0xf301b000; /* XXX not in prom? */
985 if (!request_mem_region(p->cmap_regs_phys, 0x1000, "controlfb cmap")) {
986 p->cmap_regs_phys = 0;
989 p->cmap_regs = ioremap(p->cmap_regs_phys, 0x1000);
991 if (!p->cmap_regs || !p->control_regs || !p->frame_buffer)
998 if (init_control(p) < 0)
1008 static int __init control_init(void)
1010 struct device_node *dp;
1011 char *option = NULL;
1014 if (fb_get_options("controlfb", &option))
1016 control_setup(option);
1018 dp = of_find_node_by_name(NULL, "control");
1019 if (dp && !control_of_init(dp))
1026 device_initcall(control_init);