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c7f439b99e
All of these drivers use a silly:
struct all_info {
struct fb_info info;
struct foo_par par;
};
struct all_info *all = kzalloc(sizeof(*all), GFP_KERNEL);
all->info.par = &all->par;
etc. etc. code sequence, basically replicating the provided
framebuffer_alloc()/framebuffer_release(), and doing it badly.
Not only is this massive code duplication, it also caused a
bug in that we weren't setting the fb_info->device pointer
which results in an OOPS when fb_is_primary_device() runs.
Fix all of this by using framebuffer_{alloc,release}() and
passing in "&of_device->dev" as the device pointer.
Signed-off-by: David S. Miller <davem@davemloft.net>
387 lines
9 KiB
C
387 lines
9 KiB
C
/* p9100.c: P9100 frame buffer driver
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*
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* Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
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* Copyright 1999 Derrick J Brashear (shadow@dementia.org)
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*
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* Driver layout based loosely on tgafb.c, see that file for credits.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/fb.h>
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#include <linux/mm.h>
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#include <asm/io.h>
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#include <asm/prom.h>
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#include <asm/of_device.h>
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#include <asm/fbio.h>
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#include "sbuslib.h"
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/*
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* Local functions.
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*/
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static int p9100_setcolreg(unsigned, unsigned, unsigned, unsigned,
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unsigned, struct fb_info *);
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static int p9100_blank(int, struct fb_info *);
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static int p9100_mmap(struct fb_info *, struct vm_area_struct *);
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static int p9100_ioctl(struct fb_info *, unsigned int, unsigned long);
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/*
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* Frame buffer operations
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*/
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static struct fb_ops p9100_ops = {
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.owner = THIS_MODULE,
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.fb_setcolreg = p9100_setcolreg,
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.fb_blank = p9100_blank,
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.fb_fillrect = cfb_fillrect,
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.fb_copyarea = cfb_copyarea,
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.fb_imageblit = cfb_imageblit,
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.fb_mmap = p9100_mmap,
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.fb_ioctl = p9100_ioctl,
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#ifdef CONFIG_COMPAT
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.fb_compat_ioctl = sbusfb_compat_ioctl,
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#endif
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};
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/* P9100 control registers */
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#define P9100_SYSCTL_OFF 0x0UL
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#define P9100_VIDEOCTL_OFF 0x100UL
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#define P9100_VRAMCTL_OFF 0x180UL
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#define P9100_RAMDAC_OFF 0x200UL
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#define P9100_VIDEOCOPROC_OFF 0x400UL
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/* P9100 command registers */
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#define P9100_CMD_OFF 0x0UL
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/* P9100 framebuffer memory */
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#define P9100_FB_OFF 0x0UL
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/* 3 bits: 2=8bpp 3=16bpp 5=32bpp 7=24bpp */
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#define SYS_CONFIG_PIXELSIZE_SHIFT 26
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#define SCREENPAINT_TIMECTL1_ENABLE_VIDEO 0x20 /* 0 = off, 1 = on */
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struct p9100_regs {
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/* Registers for the system control */
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u32 sys_base;
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u32 sys_config;
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u32 sys_intr;
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u32 sys_int_ena;
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u32 sys_alt_rd;
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u32 sys_alt_wr;
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u32 sys_xxx[58];
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/* Registers for the video control */
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u32 vid_base;
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u32 vid_hcnt;
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u32 vid_htotal;
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u32 vid_hsync_rise;
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u32 vid_hblank_rise;
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u32 vid_hblank_fall;
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u32 vid_hcnt_preload;
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u32 vid_vcnt;
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u32 vid_vlen;
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u32 vid_vsync_rise;
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u32 vid_vblank_rise;
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u32 vid_vblank_fall;
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u32 vid_vcnt_preload;
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u32 vid_screenpaint_addr;
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u32 vid_screenpaint_timectl1;
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u32 vid_screenpaint_qsfcnt;
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u32 vid_screenpaint_timectl2;
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u32 vid_xxx[15];
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/* Registers for the video control */
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u32 vram_base;
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u32 vram_memcfg;
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u32 vram_refresh_pd;
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u32 vram_refresh_cnt;
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u32 vram_raslo_max;
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u32 vram_raslo_cur;
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u32 pwrup_cfg;
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u32 vram_xxx[25];
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/* Registers for IBM RGB528 Palette */
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u32 ramdac_cmap_wridx;
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u32 ramdac_palette_data;
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u32 ramdac_pixel_mask;
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u32 ramdac_palette_rdaddr;
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u32 ramdac_idx_lo;
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u32 ramdac_idx_hi;
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u32 ramdac_idx_data;
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u32 ramdac_idx_ctl;
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u32 ramdac_xxx[1784];
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};
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struct p9100_cmd_parameng {
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u32 parameng_status;
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u32 parameng_bltcmd;
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u32 parameng_quadcmd;
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};
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struct p9100_par {
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spinlock_t lock;
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struct p9100_regs __iomem *regs;
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u32 flags;
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#define P9100_FLAG_BLANKED 0x00000001
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unsigned long physbase;
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unsigned long which_io;
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unsigned long fbsize;
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};
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/**
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* p9100_setcolreg - Optional function. Sets a color register.
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* @regno: boolean, 0 copy local, 1 get_user() function
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* @red: frame buffer colormap structure
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* @green: The green value which can be up to 16 bits wide
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* @blue: The blue value which can be up to 16 bits wide.
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* @transp: If supported the alpha value which can be up to 16 bits wide.
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* @info: frame buffer info structure
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*/
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static int p9100_setcolreg(unsigned regno,
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unsigned red, unsigned green, unsigned blue,
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unsigned transp, struct fb_info *info)
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{
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struct p9100_par *par = (struct p9100_par *) info->par;
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struct p9100_regs __iomem *regs = par->regs;
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unsigned long flags;
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if (regno >= 256)
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return 1;
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red >>= 8;
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green >>= 8;
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blue >>= 8;
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spin_lock_irqsave(&par->lock, flags);
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sbus_writel((regno << 16), ®s->ramdac_cmap_wridx);
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sbus_writel((red << 16), ®s->ramdac_palette_data);
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sbus_writel((green << 16), ®s->ramdac_palette_data);
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sbus_writel((blue << 16), ®s->ramdac_palette_data);
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spin_unlock_irqrestore(&par->lock, flags);
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return 0;
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}
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/**
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* p9100_blank - Optional function. Blanks the display.
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* @blank_mode: the blank mode we want.
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* @info: frame buffer structure that represents a single frame buffer
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*/
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static int
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p9100_blank(int blank, struct fb_info *info)
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{
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struct p9100_par *par = (struct p9100_par *) info->par;
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struct p9100_regs __iomem *regs = par->regs;
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unsigned long flags;
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u32 val;
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spin_lock_irqsave(&par->lock, flags);
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switch (blank) {
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case FB_BLANK_UNBLANK: /* Unblanking */
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val = sbus_readl(®s->vid_screenpaint_timectl1);
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val |= SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
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sbus_writel(val, ®s->vid_screenpaint_timectl1);
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par->flags &= ~P9100_FLAG_BLANKED;
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break;
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case FB_BLANK_NORMAL: /* Normal blanking */
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case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
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case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
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case FB_BLANK_POWERDOWN: /* Poweroff */
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val = sbus_readl(®s->vid_screenpaint_timectl1);
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val &= ~SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
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sbus_writel(val, ®s->vid_screenpaint_timectl1);
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par->flags |= P9100_FLAG_BLANKED;
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break;
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}
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spin_unlock_irqrestore(&par->lock, flags);
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return 0;
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}
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static struct sbus_mmap_map p9100_mmap_map[] = {
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{ CG3_MMAP_OFFSET, 0, SBUS_MMAP_FBSIZE(1) },
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{ 0, 0, 0 }
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};
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static int p9100_mmap(struct fb_info *info, struct vm_area_struct *vma)
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{
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struct p9100_par *par = (struct p9100_par *)info->par;
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return sbusfb_mmap_helper(p9100_mmap_map,
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par->physbase, par->fbsize,
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par->which_io, vma);
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}
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static int p9100_ioctl(struct fb_info *info, unsigned int cmd,
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unsigned long arg)
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{
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struct p9100_par *par = (struct p9100_par *) info->par;
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/* Make it look like a cg3. */
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return sbusfb_ioctl_helper(cmd, arg, info,
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FBTYPE_SUN3COLOR, 8, par->fbsize);
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}
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/*
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* Initialisation
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*/
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static void p9100_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;
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info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
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info->fix.line_length = linebytes;
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info->fix.accel = FB_ACCEL_SUN_CGTHREE;
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}
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static int __devinit p9100_probe(struct of_device *op, const struct of_device_id *match)
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{
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struct device_node *dp = op->node;
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struct fb_info *info;
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struct p9100_par *par;
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int linebytes, err;
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info = framebuffer_alloc(sizeof(struct p9100_par), &op->dev);
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err = -ENOMEM;
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if (!info)
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goto out_err;
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par = info->par;
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spin_lock_init(&par->lock);
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/* This is the framebuffer and the only resource apps can mmap. */
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par->physbase = op->resource[2].start;
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par->which_io = op->resource[2].flags & IORESOURCE_BITS;
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sbusfb_fill_var(&info->var, dp->node, 8);
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info->var.red.length = 8;
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info->var.green.length = 8;
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info->var.blue.length = 8;
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linebytes = of_getintprop_default(dp, "linebytes", info->var.xres);
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par->fbsize = PAGE_ALIGN(linebytes * info->var.yres);
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par->regs = of_ioremap(&op->resource[0], 0,
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sizeof(struct p9100_regs), "p9100 regs");
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if (!par->regs)
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goto out_release_fb;
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info->flags = FBINFO_DEFAULT;
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info->fbops = &p9100_ops;
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info->screen_base = of_ioremap(&op->resource[2], 0,
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par->fbsize, "p9100 ram");
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if (!info->screen_base)
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goto out_unmap_regs;
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p9100_blank(0, info);
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if (fb_alloc_cmap(&info->cmap, 256, 0))
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goto out_unmap_screen;
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p9100_init_fix(info, linebytes, dp);
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err = register_framebuffer(info);
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if (err < 0)
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goto out_dealloc_cmap;
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fb_set_cmap(&info->cmap, info);
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dev_set_drvdata(&op->dev, info);
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printk("%s: p9100 at %lx:%lx\n",
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dp->full_name,
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par->which_io, par->physbase);
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return 0;
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out_dealloc_cmap:
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fb_dealloc_cmap(&info->cmap);
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out_unmap_screen:
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of_iounmap(&op->resource[2], info->screen_base, par->fbsize);
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out_unmap_regs:
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of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs));
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out_release_fb:
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framebuffer_release(info);
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out_err:
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return err;
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}
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static int __devexit p9100_remove(struct of_device *op)
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{
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struct fb_info *info = dev_get_drvdata(&op->dev);
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struct p9100_par *par = info->par;
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unregister_framebuffer(info);
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fb_dealloc_cmap(&info->cmap);
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of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs));
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of_iounmap(&op->resource[2], info->screen_base, par->fbsize);
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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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}
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static struct of_device_id p9100_match[] = {
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{
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.name = "p9100",
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, p9100_match);
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static struct of_platform_driver p9100_driver = {
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.name = "p9100",
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.match_table = p9100_match,
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.probe = p9100_probe,
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.remove = __devexit_p(p9100_remove),
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};
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static int __init p9100_init(void)
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{
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if (fb_get_options("p9100fb", NULL))
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return -ENODEV;
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return of_register_driver(&p9100_driver, &of_bus_type);
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}
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static void __exit p9100_exit(void)
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{
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of_unregister_driver(&p9100_driver);
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}
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module_init(p9100_init);
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module_exit(p9100_exit);
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MODULE_DESCRIPTION("framebuffer driver for P9100 chipsets");
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MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
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MODULE_VERSION("2.0");
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MODULE_LICENSE("GPL");
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