![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
505 lines
12 KiB
C
505 lines
12 KiB
C
/* tcx.c: TCX frame buffer driver
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*
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* Copyright (C) 2003 David S. Miller (davem@redhat.com)
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* Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz)
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* Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
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* Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
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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/sbus.h>
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#include <asm/oplib.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 tcx_setcolreg(unsigned, unsigned, unsigned, unsigned,
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unsigned, struct fb_info *);
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static int tcx_blank(int, struct fb_info *);
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static int tcx_mmap(struct fb_info *, struct file *, struct vm_area_struct *);
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static int tcx_ioctl(struct inode *, struct file *, unsigned int,
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unsigned long, struct fb_info *);
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/*
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* Frame buffer operations
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*/
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static struct fb_ops tcx_ops = {
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.owner = THIS_MODULE,
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.fb_setcolreg = tcx_setcolreg,
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.fb_blank = tcx_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 = tcx_mmap,
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.fb_ioctl = tcx_ioctl,
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.fb_cursor = soft_cursor,
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};
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/* THC definitions */
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#define TCX_THC_MISC_REV_SHIFT 16
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#define TCX_THC_MISC_REV_MASK 15
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#define TCX_THC_MISC_VSYNC_DIS (1 << 25)
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#define TCX_THC_MISC_HSYNC_DIS (1 << 24)
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#define TCX_THC_MISC_RESET (1 << 12)
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#define TCX_THC_MISC_VIDEO (1 << 10)
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#define TCX_THC_MISC_SYNC (1 << 9)
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#define TCX_THC_MISC_VSYNC (1 << 8)
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#define TCX_THC_MISC_SYNC_ENAB (1 << 7)
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#define TCX_THC_MISC_CURS_RES (1 << 6)
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#define TCX_THC_MISC_INT_ENAB (1 << 5)
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#define TCX_THC_MISC_INT (1 << 4)
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#define TCX_THC_MISC_INIT 0x9f
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#define TCX_THC_REV_REV_SHIFT 20
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#define TCX_THC_REV_REV_MASK 15
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#define TCX_THC_REV_MINREV_SHIFT 28
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#define TCX_THC_REV_MINREV_MASK 15
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/* The contents are unknown */
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struct tcx_tec {
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volatile u32 tec_matrix;
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volatile u32 tec_clip;
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volatile u32 tec_vdc;
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};
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struct tcx_thc {
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volatile u32 thc_rev;
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u32 thc_pad0[511];
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volatile u32 thc_hs; /* hsync timing */
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volatile u32 thc_hsdvs;
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volatile u32 thc_hd;
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volatile u32 thc_vs; /* vsync timing */
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volatile u32 thc_vd;
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volatile u32 thc_refresh;
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volatile u32 thc_misc;
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u32 thc_pad1[56];
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volatile u32 thc_cursxy; /* cursor x,y position (16 bits each) */
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volatile u32 thc_cursmask[32]; /* cursor mask bits */
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volatile u32 thc_cursbits[32]; /* what to show where mask enabled */
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};
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struct bt_regs {
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volatile u32 addr;
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volatile u32 color_map;
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volatile u32 control;
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volatile u32 cursor;
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};
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#define TCX_MMAP_ENTRIES 14
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struct tcx_par {
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spinlock_t lock;
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struct bt_regs __iomem *bt;
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struct tcx_thc __iomem *thc;
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struct tcx_tec __iomem *tec;
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volatile u32 __iomem *cplane;
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u32 flags;
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#define TCX_FLAG_BLANKED 0x00000001
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unsigned long physbase;
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unsigned long fbsize;
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struct sbus_mmap_map mmap_map[TCX_MMAP_ENTRIES];
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int lowdepth;
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struct sbus_dev *sdev;
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struct list_head list;
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};
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/* Reset control plane so that WID is 8-bit plane. */
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static void __tcx_set_control_plane (struct tcx_par *par)
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{
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volatile u32 __iomem *p, *pend;
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if (par->lowdepth)
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return;
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p = par->cplane;
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if (p == NULL)
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return;
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for (pend = p + par->fbsize; p < pend; p++) {
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u32 tmp = sbus_readl(p);
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tmp &= 0xffffff;
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sbus_writel(tmp, p);
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}
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}
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static void tcx_reset (struct fb_info *info)
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{
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struct tcx_par *par = (struct tcx_par *) info->par;
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unsigned long flags;
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spin_lock_irqsave(&par->lock, flags);
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__tcx_set_control_plane(par);
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spin_unlock_irqrestore(&par->lock, flags);
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}
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/**
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* tcx_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 tcx_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 tcx_par *par = (struct tcx_par *) info->par;
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struct bt_regs __iomem *bt = par->bt;
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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 << 24, &bt->addr);
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sbus_writel(red << 24, &bt->color_map);
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sbus_writel(green << 24, &bt->color_map);
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sbus_writel(blue << 24, &bt->color_map);
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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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* tcx_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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tcx_blank(int blank, struct fb_info *info)
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{
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struct tcx_par *par = (struct tcx_par *) info->par;
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struct tcx_thc __iomem *thc = par->thc;
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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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val = sbus_readl(&thc->thc_misc);
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switch (blank) {
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case FB_BLANK_UNBLANK: /* Unblanking */
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val &= ~(TCX_THC_MISC_VSYNC_DIS |
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TCX_THC_MISC_HSYNC_DIS);
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val |= TCX_THC_MISC_VIDEO;
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par->flags &= ~TCX_FLAG_BLANKED;
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break;
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case FB_BLANK_NORMAL: /* Normal blanking */
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val &= ~TCX_THC_MISC_VIDEO;
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par->flags |= TCX_FLAG_BLANKED;
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break;
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case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
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val |= TCX_THC_MISC_VSYNC_DIS;
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break;
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case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
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val |= TCX_THC_MISC_HSYNC_DIS;
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break;
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case FB_BLANK_POWERDOWN: /* Poweroff */
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break;
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};
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sbus_writel(val, &thc->thc_misc);
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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 __tcx_mmap_map[TCX_MMAP_ENTRIES] = {
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{
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.voff = TCX_RAM8BIT,
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.size = SBUS_MMAP_FBSIZE(1)
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},
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{
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.voff = TCX_RAM24BIT,
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.size = SBUS_MMAP_FBSIZE(4)
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},
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{
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.voff = TCX_UNK3,
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.size = SBUS_MMAP_FBSIZE(8)
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},
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{
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.voff = TCX_UNK4,
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.size = SBUS_MMAP_FBSIZE(8)
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},
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{
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.voff = TCX_CONTROLPLANE,
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.size = SBUS_MMAP_FBSIZE(4)
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},
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{
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.voff = TCX_UNK6,
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.size = SBUS_MMAP_FBSIZE(8)
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},
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{
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.voff = TCX_UNK7,
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.size = SBUS_MMAP_FBSIZE(8)
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},
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{
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.voff = TCX_TEC,
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.size = PAGE_SIZE
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},
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{
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.voff = TCX_BTREGS,
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.size = PAGE_SIZE
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},
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{
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.voff = TCX_THC,
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.size = PAGE_SIZE
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},
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{
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.voff = TCX_DHC,
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.size = PAGE_SIZE
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},
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{
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.voff = TCX_ALT,
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.size = PAGE_SIZE
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},
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{
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.voff = TCX_UNK2,
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.size = 0x20000
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},
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{ .size = 0 }
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};
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static int tcx_mmap(struct fb_info *info, struct file *file, struct vm_area_struct *vma)
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{
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struct tcx_par *par = (struct tcx_par *)info->par;
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return sbusfb_mmap_helper(par->mmap_map,
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par->physbase, par->fbsize,
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par->sdev->reg_addrs[0].which_io,
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vma);
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}
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static int tcx_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
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unsigned long arg, struct fb_info *info)
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{
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struct tcx_par *par = (struct tcx_par *) info->par;
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return sbusfb_ioctl_helper(cmd, arg, info,
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FBTYPE_TCXCOLOR,
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(par->lowdepth ? 8 : 24),
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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
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tcx_init_fix(struct fb_info *info, int linebytes)
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{
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struct tcx_par *par = (struct tcx_par *)info->par;
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const char *tcx_name;
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if (par->lowdepth)
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tcx_name = "TCX8";
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else
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tcx_name = "TCX24";
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strlcpy(info->fix.id, tcx_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_TCX;
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}
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struct all_info {
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struct fb_info info;
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struct tcx_par par;
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struct list_head list;
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};
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static LIST_HEAD(tcx_list);
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static void tcx_init_one(struct sbus_dev *sdev)
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{
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struct all_info *all;
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int linebytes, i;
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all = kmalloc(sizeof(*all), GFP_KERNEL);
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if (!all) {
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printk(KERN_ERR "tcx: Cannot allocate memory.\n");
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return;
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}
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memset(all, 0, sizeof(*all));
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INIT_LIST_HEAD(&all->list);
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spin_lock_init(&all->par.lock);
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all->par.sdev = sdev;
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all->par.lowdepth = prom_getbool(sdev->prom_node, "tcx-8-bit");
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sbusfb_fill_var(&all->info.var, sdev->prom_node, 8);
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linebytes = prom_getintdefault(sdev->prom_node, "linebytes",
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all->info.var.xres);
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all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);
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all->par.tec = sbus_ioremap(&sdev->resource[7], 0,
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sizeof(struct tcx_tec), "tcx tec");
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all->par.thc = sbus_ioremap(&sdev->resource[9], 0,
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sizeof(struct tcx_thc), "tcx thc");
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all->par.bt = sbus_ioremap(&sdev->resource[8], 0,
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sizeof(struct bt_regs), "tcx dac");
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memcpy(&all->par.mmap_map, &__tcx_mmap_map, sizeof(all->par.mmap_map));
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if (!all->par.lowdepth) {
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all->par.cplane = sbus_ioremap(&sdev->resource[4], 0,
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all->par.fbsize * sizeof(u32), "tcx cplane");
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} else {
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all->par.mmap_map[1].size = SBUS_MMAP_EMPTY;
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all->par.mmap_map[4].size = SBUS_MMAP_EMPTY;
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all->par.mmap_map[5].size = SBUS_MMAP_EMPTY;
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all->par.mmap_map[6].size = SBUS_MMAP_EMPTY;
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}
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all->par.physbase = 0;
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for (i = 0; i < TCX_MMAP_ENTRIES; i++) {
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int j;
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switch (i) {
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case 10:
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j = 12;
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break;
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case 11: case 12:
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j = i - 1;
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break;
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default:
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j = i;
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break;
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};
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all->par.mmap_map[i].poff = sdev->reg_addrs[j].phys_addr;
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}
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all->info.flags = FBINFO_DEFAULT;
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all->info.fbops = &tcx_ops;
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#ifdef CONFIG_SPARC32
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all->info.screen_base = (char __iomem *)
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prom_getintdefault(sdev->prom_node, "address", 0);
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#endif
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if (!all->info.screen_base)
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all->info.screen_base = sbus_ioremap(&sdev->resource[0], 0,
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all->par.fbsize, "tcx ram");
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all->info.par = &all->par;
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/* Initialize brooktree DAC. */
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sbus_writel(0x04 << 24, &all->par.bt->addr); /* color planes */
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sbus_writel(0xff << 24, &all->par.bt->control);
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sbus_writel(0x05 << 24, &all->par.bt->addr);
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sbus_writel(0x00 << 24, &all->par.bt->control);
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sbus_writel(0x06 << 24, &all->par.bt->addr); /* overlay plane */
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sbus_writel(0x73 << 24, &all->par.bt->control);
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sbus_writel(0x07 << 24, &all->par.bt->addr);
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sbus_writel(0x00 << 24, &all->par.bt->control);
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tcx_reset(&all->info);
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tcx_blank(0, &all->info);
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if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
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printk(KERN_ERR "tcx: Could not allocate color map.\n");
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kfree(all);
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return;
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}
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tcx_init_fix(&all->info, linebytes);
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if (register_framebuffer(&all->info) < 0) {
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printk(KERN_ERR "tcx: Could not register framebuffer.\n");
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fb_dealloc_cmap(&all->info.cmap);
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kfree(all);
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return;
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}
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list_add(&all->list, &tcx_list);
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printk("tcx: %s at %lx:%lx, %s\n",
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sdev->prom_name,
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(long) sdev->reg_addrs[0].which_io,
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(long) sdev->reg_addrs[0].phys_addr,
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all->par.lowdepth ? "8-bit only" : "24-bit depth");
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}
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int __init tcx_init(void)
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{
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struct sbus_bus *sbus;
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struct sbus_dev *sdev;
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if (fb_get_options("tcxfb", NULL))
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return -ENODEV;
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for_all_sbusdev(sdev, sbus) {
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if (!strcmp(sdev->prom_name, "tcx"))
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tcx_init_one(sdev);
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}
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return 0;
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}
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void __exit tcx_exit(void)
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{
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struct list_head *pos, *tmp;
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list_for_each_safe(pos, tmp, &tcx_list) {
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struct all_info *all = list_entry(pos, typeof(*all), list);
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unregister_framebuffer(&all->info);
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fb_dealloc_cmap(&all->info.cmap);
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kfree(all);
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}
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}
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int __init
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tcx_setup(char *arg)
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{
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/* No cmdline options yet... */
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return 0;
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}
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module_init(tcx_init);
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#ifdef MODULE
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module_exit(tcx_exit);
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#endif
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MODULE_DESCRIPTION("framebuffer driver for TCX chipsets");
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MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
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MODULE_LICENSE("GPL");
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