Linux 2.6.34-rc3

[pohmelfs.git] / drivers / video / platinumfb.c

/*
 *  platinumfb.c -- frame buffer device for the PowerMac 'platinum' display
 *
 *  Copyright (C) 1998 Franz Sirl
 *
 *  Frame buffer structure from:
 *    drivers/video/controlfb.c -- frame buffer device for
 *    Apple 'control' display chip.
 *    Copyright (C) 1998 Dan Jacobowitz
 *
 *  Hardware information from:
 *    platinum.c: Console support for PowerMac "platinum" display adaptor.
 *    Copyright (C) 1996 Paul Mackerras and Mark Abene
 *
 *  This file is subject to the terms and conditions of the GNU General Public
 *  License. See the file COPYING in the main directory of this archive for
 *  more details.
 */

#undef DEBUG

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/nvram.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
#include <asm/io.h>
#include <asm/prom.h>
#include <asm/pgtable.h>

#include "macmodes.h"
#include "platinumfb.h"

static int default_vmode = VMODE_NVRAM;
static int default_cmode = CMODE_NVRAM;

struct fb_info_platinum {
        struct fb_info                  *info;

        int                             vmode, cmode;
        int                             xres, yres;
        int                             vxres, vyres;
        int                             xoffset, yoffset;

        struct {
                __u8 red, green, blue;
        }                               palette[256];
        u32                             pseudo_palette[16];
        
        volatile struct cmap_regs       __iomem *cmap_regs;
        unsigned long                   cmap_regs_phys;
        
        volatile struct platinum_regs   __iomem *platinum_regs;
        unsigned long                   platinum_regs_phys;
        
        __u8                            __iomem *frame_buffer;
        volatile __u8                   __iomem *base_frame_buffer;
        unsigned long                   frame_buffer_phys;
        
        unsigned long                   total_vram;
        int                             clktype;
        int                             dactype;

        struct resource                 rsrc_fb, rsrc_reg;
};

/*
 * Frame buffer device API
 */

static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
        u_int transp, struct fb_info *info);
static int platinumfb_blank(int blank_mode, struct fb_info *info);
static int platinumfb_set_par (struct fb_info *info);
static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info);

/*
 * internal functions
 */

static inline int platinum_vram_reqd(int video_mode, int color_mode);
static int read_platinum_sense(struct fb_info_platinum *pinfo);
static void set_platinum_clock(struct fb_info_platinum *pinfo);
static void platinum_set_hardware(struct fb_info_platinum *pinfo);
static int platinum_var_to_par(struct fb_var_screeninfo *var,
                               struct fb_info_platinum *pinfo,
                               int check_only);

/*
 * Interface used by the world
 */

static struct fb_ops platinumfb_ops = {
        .owner =        THIS_MODULE,
        .fb_check_var   = platinumfb_check_var,
        .fb_set_par     = platinumfb_set_par,
        .fb_setcolreg   = platinumfb_setcolreg,
        .fb_blank       = platinumfb_blank,
        .fb_fillrect    = cfb_fillrect,
        .fb_copyarea    = cfb_copyarea,
        .fb_imageblit   = cfb_imageblit,
};

/*
 * Checks a var structure
 */
static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info)
{
        return platinum_var_to_par(var, info->par, 1);
}

/*
 * Applies current var to display
 */
static int platinumfb_set_par (struct fb_info *info)
{
        struct fb_info_platinum *pinfo = info->par;
        struct platinum_regvals *init;
        int err, offset = 0x20;

        if((err = platinum_var_to_par(&info->var, pinfo, 0))) {
                printk (KERN_ERR "platinumfb_set_par: error calling"
                                 " platinum_var_to_par: %d.\n", err);
                return err;
        }

        platinum_set_hardware(pinfo);

        init = platinum_reg_init[pinfo->vmode-1];
        
        if ((pinfo->vmode == VMODE_832_624_75) && (pinfo->cmode > CMODE_8))
                offset = 0x10;

        info->screen_base = pinfo->frame_buffer + init->fb_offset + offset;
        mutex_lock(&info->mm_lock);
        info->fix.smem_start = (pinfo->frame_buffer_phys) + init->fb_offset + offset;
        mutex_unlock(&info->mm_lock);
        info->fix.visual = (pinfo->cmode == CMODE_8) ?
                FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
        info->fix.line_length = vmode_attrs[pinfo->vmode-1].hres * (1<<pinfo->cmode)
                + offset;
        printk("line_length: %x\n", info->fix.line_length);
        return 0;
}

static int platinumfb_blank(int blank,  struct fb_info *fb)
{
/*
 *  Blank the screen if blank_mode != 0, else unblank. If blank == NULL
 *  then the caller blanks by setting the CLUT (Color Look Up Table) to all
 *  black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due
 *  to e.g. a video mode which doesn't support it. Implements VESA suspend
 *  and powerdown modes on hardware that supports disabling hsync/vsync:
 *    blank_mode == 2: suspend vsync
 *    blank_mode == 3: suspend hsync
 *    blank_mode == 4: powerdown
 */
/* [danj] I think there's something fishy about those constants... */
/*
        struct fb_info_platinum *info = (struct fb_info_platinum *) fb;
        int     ctrl;

        ctrl = ld_le32(&info->platinum_regs->ctrl.r) | 0x33;
        if (blank)
                --blank_mode;
        if (blank & VESA_VSYNC_SUSPEND)
                ctrl &= ~3;
        if (blank & VESA_HSYNC_SUSPEND)
                ctrl &= ~0x30;
        out_le32(&info->platinum_regs->ctrl.r, ctrl);
*/
/* TODO: Figure out how the heck to powerdown this thing! */
        return 0;
}

static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
                              u_int transp, struct fb_info *info)
{
        struct fb_info_platinum *pinfo = info->par;
        volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;

        if (regno > 255)
                return 1;

        red >>= 8;
        green >>= 8;
        blue >>= 8;

        pinfo->palette[regno].red = red;
        pinfo->palette[regno].green = green;
        pinfo->palette[regno].blue = blue;

        out_8(&cmap_regs->addr, regno);         /* tell clut what addr to fill  */
        out_8(&cmap_regs->lut, red);            /* send one color channel at    */
        out_8(&cmap_regs->lut, green);          /* a time...                    */
        out_8(&cmap_regs->lut, blue);

        if (regno < 16) {
                int i;
                u32 *pal = info->pseudo_palette;
                switch (pinfo->cmode) {
                case CMODE_16:
                        pal[regno] = (regno << 10) | (regno << 5) | regno;
                        break;
                case CMODE_32:
                        i = (regno << 8) | regno;
                        pal[regno] = (i << 16) | i;
                        break;
                }
        }
        
        return 0;
}

static inline int platinum_vram_reqd(int video_mode, int color_mode)
{
        int baseval = vmode_attrs[video_mode-1].hres * (1<<color_mode);

        if ((video_mode == VMODE_832_624_75) && (color_mode > CMODE_8))
                baseval += 0x10;
        else
                baseval += 0x20;

        return vmode_attrs[video_mode-1].vres * baseval + 0x1000;
}

#define STORE_D2(a, d) { \
        out_8(&cmap_regs->addr, (a+32)); \
        out_8(&cmap_regs->d2, (d)); \
}

static void set_platinum_clock(struct fb_info_platinum *pinfo)
{
        volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
        struct platinum_regvals *init;

        init = platinum_reg_init[pinfo->vmode-1];

        STORE_D2(6, 0xc6);
        out_8(&cmap_regs->addr,3+32);

        if (in_8(&cmap_regs->d2) == 2) {
                STORE_D2(7, init->clock_params[pinfo->clktype][0]);
                STORE_D2(8, init->clock_params[pinfo->clktype][1]);
                STORE_D2(3, 3);
        } else {
                STORE_D2(4, init->clock_params[pinfo->clktype][0]);
                STORE_D2(5, init->clock_params[pinfo->clktype][1]);
                STORE_D2(3, 2);
        }

        __delay(5000);
        STORE_D2(9, 0xa6);
}


/* Now how about actually saying, Make it so! */
/* Some things in here probably don't need to be done each time. */
static void platinum_set_hardware(struct fb_info_platinum *pinfo)
{
        volatile struct platinum_regs   __iomem *platinum_regs = pinfo->platinum_regs;
        volatile struct cmap_regs       __iomem *cmap_regs = pinfo->cmap_regs;
        struct platinum_regvals         *init;
        int                             i;
        int                             vmode, cmode;
        
        vmode = pinfo->vmode;
        cmode = pinfo->cmode;

        init = platinum_reg_init[vmode - 1];

        /* Initialize display timing registers */
        out_be32(&platinum_regs->reg[24].r, 7); /* turn display off */

        for (i = 0; i < 26; ++i)
                out_be32(&platinum_regs->reg[i+32].r, init->regs[i]);

        out_be32(&platinum_regs->reg[26+32].r, (pinfo->total_vram == 0x100000 ?
                                                init->offset[cmode] + 4 - cmode :
                                                init->offset[cmode]));
        out_be32(&platinum_regs->reg[16].r, (unsigned) pinfo->frame_buffer_phys+init->fb_offset+0x10);
        out_be32(&platinum_regs->reg[18].r, init->pitch[cmode]);
        out_be32(&platinum_regs->reg[19].r, (pinfo->total_vram == 0x100000 ?
                                             init->mode[cmode+1] :
                                             init->mode[cmode]));
        out_be32(&platinum_regs->reg[20].r, (pinfo->total_vram == 0x100000 ? 0x11 : 0x1011));
        out_be32(&platinum_regs->reg[21].r, 0x100);
        out_be32(&platinum_regs->reg[22].r, 1);
        out_be32(&platinum_regs->reg[23].r, 1);
        out_be32(&platinum_regs->reg[26].r, 0xc00);
        out_be32(&platinum_regs->reg[27].r, 0x235);
        /* out_be32(&platinum_regs->reg[27].r, 0x2aa); */

        STORE_D2(0, (pinfo->total_vram == 0x100000 ?
                     init->dacula_ctrl[cmode] & 0xf :
                     init->dacula_ctrl[cmode]));
        STORE_D2(1, 4);
        STORE_D2(2, 0);

        set_platinum_clock(pinfo);

        out_be32(&platinum_regs->reg[24].r, 0); /* turn display on */
}

/*
 * Set misc info vars for this driver
 */
static void __devinit platinum_init_info(struct fb_info *info, struct fb_info_platinum *pinfo)
{
        /* Fill fb_info */
        info->fbops = &platinumfb_ops;
        info->pseudo_palette = pinfo->pseudo_palette;
        info->flags = FBINFO_DEFAULT;
        info->screen_base = pinfo->frame_buffer + 0x20;

        fb_alloc_cmap(&info->cmap, 256, 0);

        /* Fill fix common fields */
        strcpy(info->fix.id, "platinum");
        info->fix.mmio_start = pinfo->platinum_regs_phys;
        info->fix.mmio_len = 0x1000;
        info->fix.type = FB_TYPE_PACKED_PIXELS;
        info->fix.smem_start = pinfo->frame_buffer_phys + 0x20; /* will be updated later */
        info->fix.smem_len = pinfo->total_vram - 0x20;
        info->fix.ywrapstep = 0;
        info->fix.xpanstep = 0;
        info->fix.ypanstep = 0;
        info->fix.type_aux = 0;
        info->fix.accel = FB_ACCEL_NONE;
}


static int __devinit platinum_init_fb(struct fb_info *info)
{
        struct fb_info_platinum *pinfo = info->par;
        struct fb_var_screeninfo var;
        int sense, rc;

        sense = read_platinum_sense(pinfo);
        printk(KERN_INFO "platinumfb: Monitor sense value = 0x%x, ", sense);
        if (default_vmode == VMODE_NVRAM) {
#ifdef CONFIG_NVRAM
                default_vmode = nvram_read_byte(NV_VMODE);
                if (default_vmode <= 0 || default_vmode > VMODE_MAX ||
                    !platinum_reg_init[default_vmode-1])
#endif
                        default_vmode = VMODE_CHOOSE;
        }
        if (default_vmode == VMODE_CHOOSE) {
                default_vmode = mac_map_monitor_sense(sense);
        }
        if (default_vmode <= 0 || default_vmode > VMODE_MAX)
                default_vmode = VMODE_640_480_60;
#ifdef CONFIG_NVRAM
        if (default_cmode == CMODE_NVRAM)
                default_cmode = nvram_read_byte(NV_CMODE);
#endif
        if (default_cmode < CMODE_8 || default_cmode > CMODE_32)
                default_cmode = CMODE_8;
        /*
         * Reduce the pixel size if we don't have enough VRAM.
         */
        while(default_cmode > CMODE_8 &&
              platinum_vram_reqd(default_vmode, default_cmode) > pinfo->total_vram)
                default_cmode--;

        printk("platinumfb:  Using video mode %d and color mode %d.\n", default_vmode, default_cmode);

        /* Setup default var */
        if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
                /* This shouldn't happen! */
                printk("mac_vmode_to_var(%d, %d,) failed\n", default_vmode, default_cmode);
try_again:
                default_vmode = VMODE_640_480_60;
                default_cmode = CMODE_8;
                if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
                        printk(KERN_ERR "platinumfb: mac_vmode_to_var() failed\n");
                        return -ENXIO;
                }
        }

        /* Initialize info structure */
        platinum_init_info(info, pinfo);

        /* Apply default var */
        info->var = var;
        var.activate = FB_ACTIVATE_NOW;
        rc = fb_set_var(info, &var);
        if (rc && (default_vmode != VMODE_640_480_60 || default_cmode != CMODE_8))
                goto try_again;

        /* Register with fbdev layer */
        rc = register_framebuffer(info);
        if (rc < 0)
                return rc;

        printk(KERN_INFO "fb%d: Apple Platinum frame buffer device\n", info->node);

        return 0;
}

/*
 * Get the monitor sense value.
 * Note that this can be called before calibrate_delay,
 * so we can't use udelay.
 */
static int read_platinum_sense(struct fb_info_platinum *info)
{
        volatile struct platinum_regs __iomem *platinum_regs = info->platinum_regs;
        int sense;

        out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
        __delay(2000);
        sense = (~in_be32(&platinum_regs->reg[23].r) & 7) << 8;

        /* drive each sense line low in turn and collect the other 2 */
        out_be32(&platinum_regs->reg[23].r, 3); /* drive A low */
        __delay(2000);
        sense |= (~in_be32(&platinum_regs->reg[23].r) & 3) << 4;
        out_be32(&platinum_regs->reg[23].r, 5); /* drive B low */
        __delay(2000);
        sense |= (~in_be32(&platinum_regs->reg[23].r) & 4) << 1;
        sense |= (~in_be32(&platinum_regs->reg[23].r) & 1) << 2;
        out_be32(&platinum_regs->reg[23].r, 6); /* drive C low */
        __delay(2000);
        sense |= (~in_be32(&platinum_regs->reg[23].r) & 6) >> 1;

        out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */

        return sense;
}

/*
 * This routine takes a user-supplied var, and picks the best vmode/cmode from it.
 * It also updates the var structure to the actual mode data obtained
 */
static int platinum_var_to_par(struct fb_var_screeninfo *var, 
                               struct fb_info_platinum *pinfo,
                               int check_only)
{
        int vmode, cmode;

        if (mac_var_to_vmode(var, &vmode, &cmode) != 0) {
                printk(KERN_ERR "platinum_var_to_par: mac_var_to_vmode unsuccessful.\n");
                printk(KERN_ERR "platinum_var_to_par: var->xres = %d\n", var->xres);
                printk(KERN_ERR "platinum_var_to_par: var->yres = %d\n", var->yres);
                printk(KERN_ERR "platinum_var_to_par: var->xres_virtual = %d\n", var->xres_virtual);
                printk(KERN_ERR "platinum_var_to_par: var->yres_virtual = %d\n", var->yres_virtual);
                printk(KERN_ERR "platinum_var_to_par: var->bits_per_pixel = %d\n", var->bits_per_pixel);
                printk(KERN_ERR "platinum_var_to_par: var->pixclock = %d\n", var->pixclock);
                printk(KERN_ERR "platinum_var_to_par: var->vmode = %d\n", var->vmode);
                return -EINVAL;
        }

        if (!platinum_reg_init[vmode-1]) {
                printk(KERN_ERR "platinum_var_to_par, vmode %d not valid.\n", vmode);
                return -EINVAL;
        }

        if (platinum_vram_reqd(vmode, cmode) > pinfo->total_vram) {
                printk(KERN_ERR "platinum_var_to_par, not enough ram for vmode %d, cmode %d.\n", vmode, cmode);
                return -EINVAL;
        }

        if (mac_vmode_to_var(vmode, cmode, var))
                return -EINVAL;

        if (check_only)
                return 0;

        pinfo->vmode = vmode;
        pinfo->cmode = cmode;
        pinfo->xres = vmode_attrs[vmode-1].hres;
        pinfo->yres = vmode_attrs[vmode-1].vres;
        pinfo->xoffset = 0;
        pinfo->yoffset = 0;
        pinfo->vxres = pinfo->xres;
        pinfo->vyres = pinfo->yres;
        
        return 0;
}


/* 
 * Parse user speficied options (`video=platinumfb:')
 */
static int __init platinumfb_setup(char *options)
{
        char *this_opt;

        if (!options || !*options)
                return 0;

        while ((this_opt = strsep(&options, ",")) != NULL) {
                if (!strncmp(this_opt, "vmode:", 6)) {
                        int vmode = simple_strtoul(this_opt+6, NULL, 0);
                        if (vmode > 0 && vmode <= VMODE_MAX)
                                default_vmode = vmode;
                } else if (!strncmp(this_opt, "cmode:", 6)) {
                        int depth = simple_strtoul(this_opt+6, NULL, 0);
                        switch (depth) {
                         case 0:
                         case 8:
                            default_cmode = CMODE_8;
                            break;
                         case 15:
                         case 16:
                            default_cmode = CMODE_16;
                            break;
                         case 24:
                         case 32:
                            default_cmode = CMODE_32;
                            break;
                        }
                }
        }
        return 0;
}

#ifdef __powerpc__
#define invalidate_cache(addr) \
        asm volatile("eieio; dcbf 0,%1" \
        : "=m" (*(addr)) : "r" (addr) : "memory");
#else
#define invalidate_cache(addr)
#endif

static int __devinit platinumfb_probe(struct of_device* odev,
                                      const struct of_device_id *match)
{
        struct device_node      *dp = odev->node;
        struct fb_info          *info;
        struct fb_info_platinum *pinfo;
        volatile __u8           *fbuffer;
        int                     bank0, bank1, bank2, bank3, rc;

        dev_info(&odev->dev, "Found Apple Platinum video hardware\n");

        info = framebuffer_alloc(sizeof(*pinfo), &odev->dev);
        if (info == NULL) {
                dev_err(&odev->dev, "Failed to allocate fbdev !\n");
                return -ENOMEM;
        }
        pinfo = info->par;

        if (of_address_to_resource(dp, 0, &pinfo->rsrc_reg) ||
            of_address_to_resource(dp, 1, &pinfo->rsrc_fb)) {
                dev_err(&odev->dev, "Can't get resources\n");
                framebuffer_release(info);
                return -ENXIO;
        }
        dev_dbg(&odev->dev, " registers  : 0x%llx...0x%llx\n",
                (unsigned long long)pinfo->rsrc_reg.start,
                (unsigned long long)pinfo->rsrc_reg.end);
        dev_dbg(&odev->dev, " framebuffer: 0x%llx...0x%llx\n",
                (unsigned long long)pinfo->rsrc_fb.start,
                (unsigned long long)pinfo->rsrc_fb.end);

        /* Do not try to request register space, they overlap with the
         * northbridge and that can fail. Only request framebuffer
         */
        if (!request_mem_region(pinfo->rsrc_fb.start,
                                pinfo->rsrc_fb.end - pinfo->rsrc_fb.start + 1,
                                "platinumfb framebuffer")) {
                printk(KERN_ERR "platinumfb: Can't request framebuffer !\n");
                framebuffer_release(info);
                return -ENXIO;
        }

        /* frame buffer - map only 4MB */
        pinfo->frame_buffer_phys = pinfo->rsrc_fb.start;
        pinfo->frame_buffer = __ioremap(pinfo->rsrc_fb.start, 0x400000,
                                        _PAGE_WRITETHRU);
        pinfo->base_frame_buffer = pinfo->frame_buffer;

        /* registers */
        pinfo->platinum_regs_phys = pinfo->rsrc_reg.start;
        pinfo->platinum_regs = ioremap(pinfo->rsrc_reg.start, 0x1000);

        pinfo->cmap_regs_phys = 0xf301b000;     /* XXX not in prom? */
        request_mem_region(pinfo->cmap_regs_phys, 0x1000, "platinumfb cmap");
        pinfo->cmap_regs = ioremap(pinfo->cmap_regs_phys, 0x1000);

        /* Grok total video ram */
        out_be32(&pinfo->platinum_regs->reg[16].r, (unsigned)pinfo->frame_buffer_phys);
        out_be32(&pinfo->platinum_regs->reg[20].r, 0x1011);     /* select max vram */
        out_be32(&pinfo->platinum_regs->reg[24].r, 0);  /* switch in vram */

        fbuffer = pinfo->base_frame_buffer;
        fbuffer[0x100000] = 0x34;
        fbuffer[0x100008] = 0x0;
        invalidate_cache(&fbuffer[0x100000]);
        fbuffer[0x200000] = 0x56;
        fbuffer[0x200008] = 0x0;
        invalidate_cache(&fbuffer[0x200000]);
        fbuffer[0x300000] = 0x78;
        fbuffer[0x300008] = 0x0;
        invalidate_cache(&fbuffer[0x300000]);
        bank0 = 1; /* builtin 1MB vram, always there */
        bank1 = fbuffer[0x100000] == 0x34;
        bank2 = fbuffer[0x200000] == 0x56;
        bank3 = fbuffer[0x300000] == 0x78;
        pinfo->total_vram = (bank0 + bank1 + bank2 + bank3) * 0x100000;
        printk(KERN_INFO "platinumfb: Total VRAM = %dMB (%d%d%d%d)\n",
               (unsigned int) (pinfo->total_vram / 1024 / 1024),
               bank3, bank2, bank1, bank0);

        /*
         * Try to determine whether we have an old or a new DACula.
         */
        out_8(&pinfo->cmap_regs->addr, 0x40);
        pinfo->dactype = in_8(&pinfo->cmap_regs->d2);
        switch (pinfo->dactype) {
        case 0x3c:
                pinfo->clktype = 1;
                printk(KERN_INFO "platinumfb: DACula type 0x3c\n");
                break;
        case 0x84:
                pinfo->clktype = 0;
                printk(KERN_INFO "platinumfb: DACula type 0x84\n");
                break;
        default:
                pinfo->clktype = 0;
                printk(KERN_INFO "platinumfb: Unknown DACula type: %x\n", pinfo->dactype);
                break;
        }
        dev_set_drvdata(&odev->dev, info);
        
        rc = platinum_init_fb(info);
        if (rc != 0) {
                iounmap(pinfo->frame_buffer);
                iounmap(pinfo->platinum_regs);
                iounmap(pinfo->cmap_regs);
                dev_set_drvdata(&odev->dev, NULL);
                framebuffer_release(info);
        }

        return rc;
}

static int __devexit platinumfb_remove(struct of_device* odev)
{
        struct fb_info          *info = dev_get_drvdata(&odev->dev);
        struct fb_info_platinum *pinfo = info->par;
        
        unregister_framebuffer (info);
        
        /* Unmap frame buffer and registers */
        iounmap(pinfo->frame_buffer);
        iounmap(pinfo->platinum_regs);
        iounmap(pinfo->cmap_regs);

        release_mem_region(pinfo->rsrc_fb.start,
                           pinfo->rsrc_fb.end -
                           pinfo->rsrc_fb.start + 1);

        release_mem_region(pinfo->cmap_regs_phys, 0x1000);

        framebuffer_release(info);

        return 0;
}

static struct of_device_id platinumfb_match[] = 
{
        {
        .name           = "platinum",
        },
        {},
};

static struct of_platform_driver platinum_driver = 
{
        .name           = "platinumfb",
        .match_table    = platinumfb_match,
        .probe          = platinumfb_probe,
        .remove         = platinumfb_remove,
};

static int __init platinumfb_init(void)
{
#ifndef MODULE
        char *option = NULL;

        if (fb_get_options("platinumfb", &option))
                return -ENODEV;
        platinumfb_setup(option);
#endif
        of_register_platform_driver(&platinum_driver);

        return 0;
}

static void __exit platinumfb_exit(void)
{
        of_unregister_platform_driver(&platinum_driver);
}

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("framebuffer driver for Apple Platinum video");
module_init(platinumfb_init);

#ifdef MODULE
module_exit(platinumfb_exit);
#endif