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drivers/video/cg3.c
11.4 KB
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/* cg3.c: CGTHREE frame buffer driver * |
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* Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net) |
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* Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz) * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx) * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be) * * Driver layout based loosely on tgafb.c, see that file for credits. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/errno.h> #include <linux/string.h> |
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#include <linux/delay.h> #include <linux/init.h> #include <linux/fb.h> #include <linux/mm.h> |
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#include <linux/of_device.h> |
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#include <asm/io.h> |
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#include <asm/fbio.h> #include "sbuslib.h" /* * Local functions. */ static int cg3_setcolreg(unsigned, unsigned, unsigned, unsigned, unsigned, struct fb_info *); static int cg3_blank(int, struct fb_info *); |
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static int cg3_mmap(struct fb_info *, struct vm_area_struct *); |
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static int cg3_ioctl(struct fb_info *, unsigned int, unsigned long); |
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/* * Frame buffer operations */ static struct fb_ops cg3_ops = { .owner = THIS_MODULE, .fb_setcolreg = cg3_setcolreg, .fb_blank = cg3_blank, .fb_fillrect = cfb_fillrect, .fb_copyarea = cfb_copyarea, .fb_imageblit = cfb_imageblit, .fb_mmap = cg3_mmap, .fb_ioctl = cg3_ioctl, |
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#ifdef CONFIG_COMPAT .fb_compat_ioctl = sbusfb_compat_ioctl, #endif |
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}; /* Control Register Constants */ #define CG3_CR_ENABLE_INTS 0x80 #define CG3_CR_ENABLE_VIDEO 0x40 #define CG3_CR_ENABLE_TIMING 0x20 #define CG3_CR_ENABLE_CURCMP 0x10 #define CG3_CR_XTAL_MASK 0x0c #define CG3_CR_DIVISOR_MASK 0x03 /* Status Register Constants */ #define CG3_SR_PENDING_INT 0x80 #define CG3_SR_RES_MASK 0x70 #define CG3_SR_1152_900_76_A 0x40 #define CG3_SR_1152_900_76_B 0x60 #define CG3_SR_ID_MASK 0x0f #define CG3_SR_ID_COLOR 0x01 #define CG3_SR_ID_MONO 0x02 #define CG3_SR_ID_MONO_ECL 0x03 enum cg3_type { CG3_AT_66HZ = 0, CG3_AT_76HZ, CG3_RDI }; struct bt_regs { |
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u32 addr; u32 color_map; u32 control; u32 cursor; |
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}; struct cg3_regs { struct bt_regs cmap; |
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u8 control; u8 status; u8 cursor_start; u8 cursor_end; u8 h_blank_start; u8 h_blank_end; u8 h_sync_start; u8 h_sync_end; u8 comp_sync_end; u8 v_blank_start_high; u8 v_blank_start_low; u8 v_blank_end; u8 v_sync_start; u8 v_sync_end; u8 xfer_holdoff_start; u8 xfer_holdoff_end; |
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}; /* Offset of interesting structures in the OBIO space */ #define CG3_REGS_OFFSET 0x400000UL #define CG3_RAM_OFFSET 0x800000UL struct cg3_par { spinlock_t lock; struct cg3_regs __iomem *regs; u32 sw_cmap[((256 * 3) + 3) / 4]; u32 flags; #define CG3_FLAG_BLANKED 0x00000001 #define CG3_FLAG_RDI 0x00000002 |
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unsigned long which_io; |
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}; /** * cg3_setcolreg - Optional function. Sets a color register. * @regno: boolean, 0 copy local, 1 get_user() function * @red: frame buffer colormap structure * @green: The green value which can be up to 16 bits wide * @blue: The blue value which can be up to 16 bits wide. * @transp: If supported the alpha value which can be up to 16 bits wide. * @info: frame buffer info structure * * The cg3 palette is loaded with 4 color values at each time * so you end up with: (rgb)(r), (gb)(rg), (b)(rgb), and so on. * We keep a sw copy of the hw cmap to assist us in this esoteric * loading procedure. */ static int cg3_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *info) { struct cg3_par *par = (struct cg3_par *) info->par; struct bt_regs __iomem *bt = &par->regs->cmap; unsigned long flags; u32 *p32; u8 *p8; int count; if (regno >= 256) return 1; red >>= 8; green >>= 8; blue >>= 8; spin_lock_irqsave(&par->lock, flags); p8 = (u8 *)par->sw_cmap + (regno * 3); p8[0] = red; p8[1] = green; p8[2] = blue; #define D4M3(x) ((((x)>>2)<<1) + ((x)>>2)) /* (x/4)*3 */ #define D4M4(x) ((x)&~0x3) /* (x/4)*4 */ count = 3; p32 = &par->sw_cmap[D4M3(regno)]; sbus_writel(D4M4(regno), &bt->addr); while (count--) sbus_writel(*p32++, &bt->color_map); #undef D4M3 #undef D4M4 spin_unlock_irqrestore(&par->lock, flags); return 0; } /** * cg3_blank - Optional function. Blanks the display. * @blank_mode: the blank mode we want. * @info: frame buffer structure that represents a single frame buffer */ |
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static int cg3_blank(int blank, struct fb_info *info) |
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{ struct cg3_par *par = (struct cg3_par *) info->par; struct cg3_regs __iomem *regs = par->regs; unsigned long flags; u8 val; spin_lock_irqsave(&par->lock, flags); switch (blank) { case FB_BLANK_UNBLANK: /* Unblanking */ val = sbus_readb(®s->control); val |= CG3_CR_ENABLE_VIDEO; sbus_writeb(val, ®s->control); par->flags &= ~CG3_FLAG_BLANKED; break; case FB_BLANK_NORMAL: /* Normal blanking */ case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */ case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */ case FB_BLANK_POWERDOWN: /* Poweroff */ val = sbus_readb(®s->control); val &= ~CG3_CR_ENABLE_VIDEO; sbus_writeb(val, ®s->control); par->flags |= CG3_FLAG_BLANKED; break; } spin_unlock_irqrestore(&par->lock, flags); return 0; } static struct sbus_mmap_map cg3_mmap_map[] = { { .voff = CG3_MMAP_OFFSET, .poff = CG3_RAM_OFFSET, .size = SBUS_MMAP_FBSIZE(1) }, { .size = 0 } }; |
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static int cg3_mmap(struct fb_info *info, struct vm_area_struct *vma) |
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{ struct cg3_par *par = (struct cg3_par *)info->par; return sbusfb_mmap_helper(cg3_mmap_map, |
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info->fix.smem_start, info->fix.smem_len, |
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par->which_io, |
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vma); } |
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static int cg3_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg) |
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{ |
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return sbusfb_ioctl_helper(cmd, arg, info, |
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FBTYPE_SUN3COLOR, 8, info->fix.smem_len); |
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} /* * Initialisation */ |
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static void __devinit cg3_init_fix(struct fb_info *info, int linebytes, struct device_node *dp) |
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{ |
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strlcpy(info->fix.id, dp->name, sizeof(info->fix.id)); |
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info->fix.type = FB_TYPE_PACKED_PIXELS; info->fix.visual = FB_VISUAL_PSEUDOCOLOR; info->fix.line_length = linebytes; info->fix.accel = FB_ACCEL_SUN_CGTHREE; } |
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static void __devinit cg3_rdi_maybe_fixup_var(struct fb_var_screeninfo *var, struct device_node *dp) |
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{ |
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const char *params; |
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char *p; int ww, hh; |
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params = of_get_property(dp, "params", NULL); if (params) { ww = simple_strtoul(params, &p, 10); |
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if (ww && *p == 'x') { hh = simple_strtoul(p + 1, &p, 10); if (hh && *p == '-') { if (var->xres != ww || var->yres != hh) { var->xres = var->xres_virtual = ww; var->yres = var->yres_virtual = hh; } } } } } |
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static u8 cg3regvals_66hz[] __devinitdata = { /* 1152 x 900, 66 Hz */ |
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0x14, 0xbb, 0x15, 0x2b, 0x16, 0x04, 0x17, 0x14, 0x18, 0xae, 0x19, 0x03, 0x1a, 0xa8, 0x1b, 0x24, 0x1c, 0x01, 0x1d, 0x05, 0x1e, 0xff, 0x1f, 0x01, 0x10, 0x20, 0 }; |
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static u8 cg3regvals_76hz[] __devinitdata = { /* 1152 x 900, 76 Hz */ |
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0x14, 0xb7, 0x15, 0x27, 0x16, 0x03, 0x17, 0x0f, 0x18, 0xae, 0x19, 0x03, 0x1a, 0xae, 0x1b, 0x2a, 0x1c, 0x01, 0x1d, 0x09, 0x1e, 0xff, 0x1f, 0x01, 0x10, 0x24, 0 }; |
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static u8 cg3regvals_rdi[] __devinitdata = { /* 640 x 480, cgRDI */ |
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0x14, 0x70, 0x15, 0x20, 0x16, 0x08, 0x17, 0x10, 0x18, 0x06, 0x19, 0x02, 0x1a, 0x31, 0x1b, 0x51, 0x1c, 0x06, 0x1d, 0x0c, 0x1e, 0xff, 0x1f, 0x01, 0x10, 0x22, 0 }; |
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static u8 *cg3_regvals[] __devinitdata = { |
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cg3regvals_66hz, cg3regvals_76hz, cg3regvals_rdi }; |
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static u_char cg3_dacvals[] __devinitdata = { |
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4, 0xff, 5, 0x00, 6, 0x70, 7, 0x00, 0 }; |
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static int __devinit cg3_do_default_mode(struct cg3_par *par) |
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{ enum cg3_type type; u8 *p; if (par->flags & CG3_FLAG_RDI) type = CG3_RDI; else { u8 status = sbus_readb(&par->regs->status), mon; if ((status & CG3_SR_ID_MASK) == CG3_SR_ID_COLOR) { mon = status & CG3_SR_RES_MASK; if (mon == CG3_SR_1152_900_76_A || mon == CG3_SR_1152_900_76_B) type = CG3_AT_76HZ; else type = CG3_AT_66HZ; } else { |
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printk(KERN_ERR "cgthree: can't handle SR %02x ", status); return -EINVAL; |
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} } for (p = cg3_regvals[type]; *p; p += 2) { u8 __iomem *regp = &((u8 __iomem *)par->regs)[p[0]]; sbus_writeb(p[1], regp); } for (p = cg3_dacvals; *p; p += 2) { |
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u8 __iomem *regp; |
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|
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regp = (u8 __iomem *)&par->regs->cmap.addr; |
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sbus_writeb(p[0], regp); |
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regp = (u8 __iomem *)&par->regs->cmap.control; |
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sbus_writeb(p[1], regp); } |
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return 0; |
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} |
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static int __devinit cg3_probe(struct platform_device *op) |
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{ |
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struct device_node *dp = op->dev.of_node; |
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struct fb_info *info; struct cg3_par *par; |
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int linebytes, err; |
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|
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info = framebuffer_alloc(sizeof(struct cg3_par), &op->dev); |
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|
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err = -ENOMEM; if (!info) goto out_err; par = info->par; |
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spin_lock_init(&par->lock); |
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info->fix.smem_start = op->resource[0].start; |
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par->which_io = op->resource[0].flags & IORESOURCE_BITS; |
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sbusfb_fill_var(&info->var, dp, 8); |
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info->var.red.length = 8; info->var.green.length = 8; info->var.blue.length = 8; |
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if (!strcmp(dp->name, "cgRDI")) |
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par->flags |= CG3_FLAG_RDI; if (par->flags & CG3_FLAG_RDI) cg3_rdi_maybe_fixup_var(&info->var, dp); |
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|
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linebytes = of_getintprop_default(dp, "linebytes", |
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info->var.xres); |
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info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres); |
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par->regs = of_ioremap(&op->resource[0], CG3_REGS_OFFSET, sizeof(struct cg3_regs), "cg3 regs"); if (!par->regs) goto out_release_fb; |
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|
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info->flags = FBINFO_DEFAULT; info->fbops = &cg3_ops; info->screen_base = of_ioremap(&op->resource[0], CG3_RAM_OFFSET, |
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info->fix.smem_len, "cg3 ram"); |
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if (!info->screen_base) goto out_unmap_regs; |
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cg3_blank(FB_BLANK_UNBLANK, info); |
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if (!of_find_property(dp, "width", NULL)) { err = cg3_do_default_mode(par); if (err) goto out_unmap_screen; } |
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if (fb_alloc_cmap(&info->cmap, 256, 0)) goto out_unmap_screen; fb_set_cmap(&info->cmap, info); |
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cg3_init_fix(info, linebytes, dp); err = register_framebuffer(info); if (err < 0) goto out_dealloc_cmap; dev_set_drvdata(&op->dev, info); |
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printk(KERN_INFO "%s: cg3 at %lx:%lx ", |
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dp->full_name, par->which_io, info->fix.smem_start); |
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return 0; |
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out_dealloc_cmap: fb_dealloc_cmap(&info->cmap); out_unmap_screen: |
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of_iounmap(&op->resource[0], info->screen_base, info->fix.smem_len); |
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out_unmap_regs: of_iounmap(&op->resource[0], par->regs, sizeof(struct cg3_regs)); out_release_fb: framebuffer_release(info); |
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out_err: return err; |
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} |
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static int __devexit cg3_remove(struct platform_device *op) |
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{ |
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struct fb_info *info = dev_get_drvdata(&op->dev); struct cg3_par *par = info->par; |
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|
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unregister_framebuffer(info); fb_dealloc_cmap(&info->cmap); |
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|
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of_iounmap(&op->resource[0], par->regs, sizeof(struct cg3_regs)); |
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of_iounmap(&op->resource[0], info->screen_base, info->fix.smem_len); |
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framebuffer_release(info); |
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dev_set_drvdata(&op->dev, NULL); |
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return 0; } |
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static const struct of_device_id cg3_match[] = { |
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{ .name = "cgthree", }, { .name = "cgRDI", }, {}, }; MODULE_DEVICE_TABLE(of, cg3_match); |
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|
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static struct platform_driver cg3_driver = { |
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.driver = { .name = "cg3", .owner = THIS_MODULE, .of_match_table = cg3_match, }, |
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.probe = cg3_probe, .remove = __devexit_p(cg3_remove), }; |
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|
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static int __init cg3_init(void) { if (fb_get_options("cg3fb", NULL)) return -ENODEV; |
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return platform_driver_register(&cg3_driver); |
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} |
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static void __exit cg3_exit(void) |
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{ |
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platform_driver_unregister(&cg3_driver); |
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} module_init(cg3_init); |
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module_exit(cg3_exit); |
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MODULE_DESCRIPTION("framebuffer driver for CGthree chipsets"); |
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MODULE_AUTHOR("David S. Miller <davem@davemloft.net>"); MODULE_VERSION("2.0"); |
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MODULE_LICENSE("GPL"); |