forked from rrcarlosr/Jetpack
541 lines
12 KiB
C
541 lines
12 KiB
C
/* tcx.c: TCX 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 (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/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 <linux/of_device.h>
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#include <asm/io.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 vm_area_struct *);
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static int tcx_ioctl(struct fb_info *, unsigned int, unsigned long);
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static int tcx_pan_display(struct fb_var_screeninfo *, 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_pan_display = tcx_pan_display,
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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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#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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/* 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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u32 tec_matrix;
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u32 tec_clip;
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u32 tec_vdc;
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};
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struct tcx_thc {
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u32 thc_rev;
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u32 thc_pad0[511];
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u32 thc_hs; /* hsync timing */
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u32 thc_hsdvs;
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u32 thc_hd;
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u32 thc_vs; /* vsync timing */
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u32 thc_vd;
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u32 thc_refresh;
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u32 thc_misc;
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u32 thc_pad1[56];
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u32 thc_cursxy; /* cursor x,y position (16 bits each) */
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u32 thc_cursmask[32]; /* cursor mask bits */
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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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u32 addr;
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u32 color_map;
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u32 control;
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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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u32 __iomem *cplane;
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u32 flags;
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#define TCX_FLAG_BLANKED 0x00000001
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unsigned long which_io;
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struct sbus_mmap_map mmap_map[TCX_MMAP_ENTRIES];
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int lowdepth;
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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 fb_info *info)
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{
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struct tcx_par *par = info->par;
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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 + info->fix.smem_len; 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(info);
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spin_unlock_irqrestore(&par->lock, flags);
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}
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static int tcx_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
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{
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tcx_reset(info);
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return 0;
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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 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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info->fix.smem_start, info->fix.smem_len,
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par->which_io, vma);
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}
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static int tcx_ioctl(struct fb_info *info, unsigned int cmd,
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unsigned long arg)
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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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info->fix.smem_len);
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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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static void tcx_unmap_regs(struct platform_device *op, struct fb_info *info,
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struct tcx_par *par)
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{
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if (par->tec)
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of_iounmap(&op->resource[7],
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par->tec, sizeof(struct tcx_tec));
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if (par->thc)
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of_iounmap(&op->resource[9],
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par->thc, sizeof(struct tcx_thc));
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if (par->bt)
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of_iounmap(&op->resource[8],
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par->bt, sizeof(struct bt_regs));
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if (par->cplane)
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of_iounmap(&op->resource[4],
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par->cplane, info->fix.smem_len * sizeof(u32));
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if (info->screen_base)
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of_iounmap(&op->resource[0],
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info->screen_base, info->fix.smem_len);
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}
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static int tcx_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;
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struct tcx_par *par;
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int linebytes, i, err;
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info = framebuffer_alloc(sizeof(struct tcx_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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par->lowdepth =
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(of_find_property(dp, "tcx-8-bit", NULL) != NULL);
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sbusfb_fill_var(&info->var, dp, 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",
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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->tec = of_ioremap(&op->resource[7], 0,
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sizeof(struct tcx_tec), "tcx tec");
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par->thc = of_ioremap(&op->resource[9], 0,
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sizeof(struct tcx_thc), "tcx thc");
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par->bt = of_ioremap(&op->resource[8], 0,
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sizeof(struct bt_regs), "tcx dac");
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info->screen_base = of_ioremap(&op->resource[0], 0,
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info->fix.smem_len, "tcx ram");
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if (!par->tec || !par->thc ||
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!par->bt || !info->screen_base)
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goto out_unmap_regs;
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memcpy(&par->mmap_map, &__tcx_mmap_map, sizeof(par->mmap_map));
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if (!par->lowdepth) {
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par->cplane = of_ioremap(&op->resource[4], 0,
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info->fix.smem_len * sizeof(u32),
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"tcx cplane");
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if (!par->cplane)
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goto out_unmap_regs;
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} else {
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par->mmap_map[1].size = SBUS_MMAP_EMPTY;
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par->mmap_map[4].size = SBUS_MMAP_EMPTY;
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par->mmap_map[5].size = SBUS_MMAP_EMPTY;
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par->mmap_map[6].size = SBUS_MMAP_EMPTY;
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}
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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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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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par->mmap_map[i].poff = op->resource[j].start;
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}
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info->flags = FBINFO_DEFAULT;
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info->fbops = &tcx_ops;
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/* Initialize brooktree DAC. */
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sbus_writel(0x04 << 24, &par->bt->addr); /* color planes */
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sbus_writel(0xff << 24, &par->bt->control);
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sbus_writel(0x05 << 24, &par->bt->addr);
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sbus_writel(0x00 << 24, &par->bt->control);
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sbus_writel(0x06 << 24, &par->bt->addr); /* overlay plane */
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sbus_writel(0x73 << 24, &par->bt->control);
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sbus_writel(0x07 << 24, &par->bt->addr);
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sbus_writel(0x00 << 24, &par->bt->control);
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tcx_reset(info);
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tcx_blank(FB_BLANK_UNBLANK, info);
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if (fb_alloc_cmap(&info->cmap, 256, 0))
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goto out_unmap_regs;
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fb_set_cmap(&info->cmap, info);
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tcx_init_fix(info, linebytes);
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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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dev_set_drvdata(&op->dev, info);
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printk(KERN_INFO "%s: TCX at %lx:%lx, %s\n",
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dp->full_name,
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par->which_io,
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info->fix.smem_start,
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par->lowdepth ? "8-bit only" : "24-bit depth");
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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_regs:
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tcx_unmap_regs(op, info, par);
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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 tcx_remove(struct platform_device *op)
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{
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struct fb_info *info = dev_get_drvdata(&op->dev);
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struct tcx_par *par = info->par;
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unregister_framebuffer(info);
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fb_dealloc_cmap(&info->cmap);
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tcx_unmap_regs(op, info, par);
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framebuffer_release(info);
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return 0;
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}
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static const struct of_device_id tcx_match[] = {
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{
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.name = "SUNW,tcx",
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, tcx_match);
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|
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static struct platform_driver tcx_driver = {
|
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.driver = {
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.name = "tcx",
|
|
.of_match_table = tcx_match,
|
|
},
|
|
.probe = tcx_probe,
|
|
.remove = tcx_remove,
|
|
};
|
|
|
|
static int __init tcx_init(void)
|
|
{
|
|
if (fb_get_options("tcxfb", NULL))
|
|
return -ENODEV;
|
|
|
|
return platform_driver_register(&tcx_driver);
|
|
}
|
|
|
|
static void __exit tcx_exit(void)
|
|
{
|
|
platform_driver_unregister(&tcx_driver);
|
|
}
|
|
|
|
module_init(tcx_init);
|
|
module_exit(tcx_exit);
|
|
|
|
MODULE_DESCRIPTION("framebuffer driver for TCX chipsets");
|
|
MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
|
|
MODULE_VERSION("2.0");
|
|
MODULE_LICENSE("GPL");
|