691 lines
15 KiB
C
691 lines
15 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* leo.c: LEO 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) 1996-1999 Jakub Jelinek (jj@ultra.linux.cz)
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* Copyright (C) 1997 Michal Rehacek (Michal.Rehacek@st.mff.cuni.cz)
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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/io.h>
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#include <linux/of.h>
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#include <linux/platform_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 leo_setcolreg(unsigned, unsigned, unsigned, unsigned,
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unsigned, struct fb_info *);
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static int leo_blank(int, struct fb_info *);
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static int leo_mmap(struct fb_info *, struct vm_area_struct *);
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static int leo_ioctl(struct fb_info *, unsigned int, unsigned long);
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static int leo_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 const struct fb_ops leo_ops = {
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.owner = THIS_MODULE,
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.fb_setcolreg = leo_setcolreg,
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.fb_blank = leo_blank,
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.fb_pan_display = leo_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 = leo_mmap,
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.fb_ioctl = leo_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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#define LEO_OFF_LC_SS0_KRN 0x00200000UL
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#define LEO_OFF_LC_SS0_USR 0x00201000UL
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#define LEO_OFF_LC_SS1_KRN 0x01200000UL
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#define LEO_OFF_LC_SS1_USR 0x01201000UL
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#define LEO_OFF_LD_SS0 0x00400000UL
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#define LEO_OFF_LD_SS1 0x01400000UL
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#define LEO_OFF_LD_GBL 0x00401000UL
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#define LEO_OFF_LX_KRN 0x00600000UL
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#define LEO_OFF_LX_CURSOR 0x00601000UL
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#define LEO_OFF_SS0 0x00800000UL
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#define LEO_OFF_SS1 0x01800000UL
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#define LEO_OFF_UNK 0x00602000UL
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#define LEO_OFF_UNK2 0x00000000UL
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#define LEO_CUR_ENABLE 0x00000080
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#define LEO_CUR_UPDATE 0x00000030
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#define LEO_CUR_PROGRESS 0x00000006
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#define LEO_CUR_UPDATECMAP 0x00000003
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#define LEO_CUR_TYPE_MASK 0x00000000
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#define LEO_CUR_TYPE_IMAGE 0x00000020
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#define LEO_CUR_TYPE_CMAP 0x00000050
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struct leo_cursor {
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u8 xxx0[16];
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u32 cur_type;
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u32 cur_misc;
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u32 cur_cursxy;
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u32 cur_data;
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};
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#define LEO_KRN_TYPE_CLUT0 0x00001000
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#define LEO_KRN_TYPE_CLUT1 0x00001001
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#define LEO_KRN_TYPE_CLUT2 0x00001002
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#define LEO_KRN_TYPE_WID 0x00001003
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#define LEO_KRN_TYPE_UNK 0x00001006
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#define LEO_KRN_TYPE_VIDEO 0x00002003
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#define LEO_KRN_TYPE_CLUTDATA 0x00004000
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#define LEO_KRN_CSR_ENABLE 0x00000008
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#define LEO_KRN_CSR_PROGRESS 0x00000004
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#define LEO_KRN_CSR_UNK 0x00000002
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#define LEO_KRN_CSR_UNK2 0x00000001
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struct leo_lx_krn {
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u32 krn_type;
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u32 krn_csr;
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u32 krn_value;
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};
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struct leo_lc_ss0_krn {
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u32 misc;
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u8 xxx0[0x800-4];
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u32 rev;
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};
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struct leo_lc_ss0_usr {
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u32 csr;
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u32 addrspace;
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u32 fontmsk;
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u32 fontt;
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u32 extent;
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u32 src;
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u32 dst;
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u32 copy;
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u32 fill;
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};
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struct leo_lc_ss1_krn {
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u8 unknown;
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};
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struct leo_lc_ss1_usr {
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u8 unknown;
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};
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struct leo_ld_ss0 {
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u8 xxx0[0xe00];
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u32 csr;
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u32 wid;
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u32 wmask;
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u32 widclip;
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u32 vclipmin;
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u32 vclipmax;
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u32 pickmin; /* SS1 only */
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u32 pickmax; /* SS1 only */
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u32 fg;
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u32 bg;
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u32 src; /* Copy/Scroll (SS0 only) */
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u32 dst; /* Copy/Scroll/Fill (SS0 only) */
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u32 extent; /* Copy/Scroll/Fill size (SS0 only) */
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u32 xxx1[3];
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u32 setsem; /* SS1 only */
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u32 clrsem; /* SS1 only */
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u32 clrpick; /* SS1 only */
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u32 clrdat; /* SS1 only */
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u32 alpha; /* SS1 only */
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u8 xxx2[0x2c];
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u32 winbg;
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u32 planemask;
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u32 rop;
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u32 z;
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u32 dczf; /* SS1 only */
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u32 dczb; /* SS1 only */
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u32 dcs; /* SS1 only */
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u32 dczs; /* SS1 only */
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u32 pickfb; /* SS1 only */
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u32 pickbb; /* SS1 only */
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u32 dcfc; /* SS1 only */
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u32 forcecol; /* SS1 only */
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u32 door[8]; /* SS1 only */
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u32 pick[5]; /* SS1 only */
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};
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#define LEO_SS1_MISC_ENABLE 0x00000001
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#define LEO_SS1_MISC_STEREO 0x00000002
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struct leo_ld_ss1 {
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u8 xxx0[0xef4];
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u32 ss1_misc;
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};
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struct leo_ld_gbl {
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u8 unknown;
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};
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struct leo_par {
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spinlock_t lock;
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struct leo_lx_krn __iomem *lx_krn;
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struct leo_lc_ss0_usr __iomem *lc_ss0_usr;
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struct leo_ld_ss0 __iomem *ld_ss0;
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struct leo_ld_ss1 __iomem *ld_ss1;
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struct leo_cursor __iomem *cursor;
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u32 extent;
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u32 clut_data[256];
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u32 flags;
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#define LEO_FLAG_BLANKED 0x00000001
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unsigned long which_io;
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};
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static void leo_wait(struct leo_lx_krn __iomem *lx_krn)
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{
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int i;
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for (i = 0;
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(sbus_readl(&lx_krn->krn_csr) & LEO_KRN_CSR_PROGRESS) &&
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i < 300000;
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i++)
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udelay(1); /* Busy wait at most 0.3 sec */
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return;
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}
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static void leo_switch_from_graph(struct fb_info *info)
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{
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struct leo_par *par = (struct leo_par *) info->par;
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struct leo_ld_ss0 __iomem *ss = par->ld_ss0;
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struct leo_cursor __iomem *cursor = par->cursor;
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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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par->extent = ((info->var.xres - 1) |
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((info->var.yres - 1) << 16));
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sbus_writel(0xffffffff, &ss->wid);
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sbus_writel(0xffff, &ss->wmask);
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sbus_writel(0, &ss->vclipmin);
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sbus_writel(par->extent, &ss->vclipmax);
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sbus_writel(0, &ss->fg);
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sbus_writel(0xff000000, &ss->planemask);
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sbus_writel(0x310850, &ss->rop);
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sbus_writel(0, &ss->widclip);
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sbus_writel((info->var.xres-1) | ((info->var.yres-1) << 11),
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&par->lc_ss0_usr->extent);
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sbus_writel(4, &par->lc_ss0_usr->addrspace);
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sbus_writel(0x80000000, &par->lc_ss0_usr->fill);
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sbus_writel(0, &par->lc_ss0_usr->fontt);
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do {
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val = sbus_readl(&par->lc_ss0_usr->csr);
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} while (val & 0x20000000);
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/* setup screen buffer for cfb_* functions */
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sbus_writel(1, &ss->wid);
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sbus_writel(0x00ffffff, &ss->planemask);
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sbus_writel(0x310b90, &ss->rop);
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sbus_writel(0, &par->lc_ss0_usr->addrspace);
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/* hide cursor */
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sbus_writel(sbus_readl(&cursor->cur_misc) & ~LEO_CUR_ENABLE, &cursor->cur_misc);
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spin_unlock_irqrestore(&par->lock, flags);
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}
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static int leo_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
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{
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/* We just use this to catch switches out of
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* graphics mode.
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*/
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leo_switch_from_graph(info);
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if (var->xoffset || var->yoffset || var->vmode)
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return -EINVAL;
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return 0;
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}
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/**
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* leo_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 leo_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 leo_par *par = (struct leo_par *) info->par;
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struct leo_lx_krn __iomem *lx_krn = par->lx_krn;
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unsigned long flags;
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u32 val;
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int i;
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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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par->clut_data[regno] = red | (green << 8) | (blue << 16);
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spin_lock_irqsave(&par->lock, flags);
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leo_wait(lx_krn);
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sbus_writel(LEO_KRN_TYPE_CLUTDATA, &lx_krn->krn_type);
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for (i = 0; i < 256; i++)
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sbus_writel(par->clut_data[i], &lx_krn->krn_value);
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sbus_writel(LEO_KRN_TYPE_CLUT0, &lx_krn->krn_type);
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val = sbus_readl(&lx_krn->krn_csr);
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val |= (LEO_KRN_CSR_UNK | LEO_KRN_CSR_UNK2);
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sbus_writel(val, &lx_krn->krn_csr);
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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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* leo_blank - Optional function. Blanks the display.
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* @blank: 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 leo_blank(int blank, struct fb_info *info)
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{
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struct leo_par *par = (struct leo_par *) info->par;
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struct leo_lx_krn __iomem *lx_krn = par->lx_krn;
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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(&lx_krn->krn_csr);
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val |= LEO_KRN_CSR_ENABLE;
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sbus_writel(val, &lx_krn->krn_csr);
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par->flags &= ~LEO_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(&lx_krn->krn_csr);
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val &= ~LEO_KRN_CSR_ENABLE;
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sbus_writel(val, &lx_krn->krn_csr);
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par->flags |= LEO_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 leo_mmap_map[] = {
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{
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.voff = LEO_SS0_MAP,
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.poff = LEO_OFF_SS0,
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.size = 0x800000
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},
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{
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.voff = LEO_LC_SS0_USR_MAP,
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.poff = LEO_OFF_LC_SS0_USR,
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.size = 0x1000
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},
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{
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.voff = LEO_LD_SS0_MAP,
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.poff = LEO_OFF_LD_SS0,
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.size = 0x1000
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},
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{
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.voff = LEO_LX_CURSOR_MAP,
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.poff = LEO_OFF_LX_CURSOR,
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.size = 0x1000
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},
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{
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.voff = LEO_SS1_MAP,
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.poff = LEO_OFF_SS1,
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.size = 0x800000
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},
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{
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.voff = LEO_LC_SS1_USR_MAP,
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.poff = LEO_OFF_LC_SS1_USR,
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.size = 0x1000
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},
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{
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.voff = LEO_LD_SS1_MAP,
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.poff = LEO_OFF_LD_SS1,
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.size = 0x1000
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},
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{
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.voff = LEO_UNK_MAP,
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.poff = LEO_OFF_UNK,
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.size = 0x1000
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},
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{
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.voff = LEO_LX_KRN_MAP,
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.poff = LEO_OFF_LX_KRN,
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.size = 0x1000
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},
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{
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.voff = LEO_LC_SS0_KRN_MAP,
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.poff = LEO_OFF_LC_SS0_KRN,
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.size = 0x1000
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},
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{
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.voff = LEO_LC_SS1_KRN_MAP,
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.poff = LEO_OFF_LC_SS1_KRN,
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.size = 0x1000
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},
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{
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.voff = LEO_LD_GBL_MAP,
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.poff = LEO_OFF_LD_GBL,
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.size = 0x1000
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},
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{
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.voff = LEO_UNK2_MAP,
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.poff = LEO_OFF_UNK2,
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.size = 0x100000
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},
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{ .size = 0 }
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};
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static int leo_mmap(struct fb_info *info, struct vm_area_struct *vma)
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{
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struct leo_par *par = (struct leo_par *)info->par;
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return sbusfb_mmap_helper(leo_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 leo_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
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{
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return sbusfb_ioctl_helper(cmd, arg, info,
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FBTYPE_SUNLEO, 32, 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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leo_init_fix(struct fb_info *info, struct device_node *dp)
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{
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snprintf(info->fix.id, sizeof(info->fix.id), "%pOFn", dp);
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info->fix.type = FB_TYPE_PACKED_PIXELS;
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info->fix.visual = FB_VISUAL_TRUECOLOR;
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info->fix.line_length = 8192;
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info->fix.accel = FB_ACCEL_SUN_LEO;
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}
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static void leo_wid_put(struct fb_info *info, struct fb_wid_list *wl)
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{
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struct leo_par *par = (struct leo_par *) info->par;
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struct leo_lx_krn __iomem *lx_krn = par->lx_krn;
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struct fb_wid_item *wi;
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unsigned long flags;
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u32 val;
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int i, j;
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spin_lock_irqsave(&par->lock, flags);
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leo_wait(lx_krn);
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for (i = 0, wi = wl->wl_list; i < wl->wl_count; i++, wi++) {
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switch (wi->wi_type) {
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case FB_WID_DBL_8:
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j = (wi->wi_index & 0xf) + 0x40;
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break;
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case FB_WID_DBL_24:
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j = wi->wi_index & 0x3f;
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break;
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default:
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continue;
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}
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sbus_writel(0x5800 + j, &lx_krn->krn_type);
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sbus_writel(wi->wi_values[0], &lx_krn->krn_value);
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}
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sbus_writel(LEO_KRN_TYPE_WID, &lx_krn->krn_type);
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val = sbus_readl(&lx_krn->krn_csr);
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val |= (LEO_KRN_CSR_UNK | LEO_KRN_CSR_UNK2);
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sbus_writel(val, &lx_krn->krn_csr);
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spin_unlock_irqrestore(&par->lock, flags);
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}
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static void leo_init_wids(struct fb_info *info)
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{
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struct fb_wid_item wi;
|
|
struct fb_wid_list wl;
|
|
|
|
wl.wl_count = 1;
|
|
wl.wl_list = &wi;
|
|
wi.wi_type = FB_WID_DBL_8;
|
|
wi.wi_index = 0;
|
|
wi.wi_values [0] = 0x2c0;
|
|
leo_wid_put(info, &wl);
|
|
wi.wi_index = 1;
|
|
wi.wi_values [0] = 0x30;
|
|
leo_wid_put(info, &wl);
|
|
wi.wi_index = 2;
|
|
wi.wi_values [0] = 0x20;
|
|
leo_wid_put(info, &wl);
|
|
wi.wi_type = FB_WID_DBL_24;
|
|
wi.wi_index = 1;
|
|
wi.wi_values [0] = 0x30;
|
|
leo_wid_put(info, &wl);
|
|
}
|
|
|
|
static void leo_init_hw(struct fb_info *info)
|
|
{
|
|
struct leo_par *par = (struct leo_par *) info->par;
|
|
u32 val;
|
|
|
|
val = sbus_readl(&par->ld_ss1->ss1_misc);
|
|
val |= LEO_SS1_MISC_ENABLE;
|
|
sbus_writel(val, &par->ld_ss1->ss1_misc);
|
|
|
|
leo_switch_from_graph(info);
|
|
}
|
|
|
|
static void leo_fixup_var_rgb(struct fb_var_screeninfo *var)
|
|
{
|
|
var->red.offset = 0;
|
|
var->red.length = 8;
|
|
var->green.offset = 8;
|
|
var->green.length = 8;
|
|
var->blue.offset = 16;
|
|
var->blue.length = 8;
|
|
var->transp.offset = 0;
|
|
var->transp.length = 0;
|
|
}
|
|
|
|
static void leo_unmap_regs(struct platform_device *op, struct fb_info *info,
|
|
struct leo_par *par)
|
|
{
|
|
if (par->lc_ss0_usr)
|
|
of_iounmap(&op->resource[0], par->lc_ss0_usr, 0x1000);
|
|
if (par->ld_ss0)
|
|
of_iounmap(&op->resource[0], par->ld_ss0, 0x1000);
|
|
if (par->ld_ss1)
|
|
of_iounmap(&op->resource[0], par->ld_ss1, 0x1000);
|
|
if (par->lx_krn)
|
|
of_iounmap(&op->resource[0], par->lx_krn, 0x1000);
|
|
if (par->cursor)
|
|
of_iounmap(&op->resource[0],
|
|
par->cursor, sizeof(struct leo_cursor));
|
|
if (info->screen_base)
|
|
of_iounmap(&op->resource[0], info->screen_base, 0x800000);
|
|
}
|
|
|
|
static int leo_probe(struct platform_device *op)
|
|
{
|
|
struct device_node *dp = op->dev.of_node;
|
|
struct fb_info *info;
|
|
struct leo_par *par;
|
|
int linebytes, err;
|
|
|
|
info = framebuffer_alloc(sizeof(struct leo_par), &op->dev);
|
|
|
|
err = -ENOMEM;
|
|
if (!info)
|
|
goto out_err;
|
|
par = info->par;
|
|
|
|
spin_lock_init(&par->lock);
|
|
|
|
info->fix.smem_start = op->resource[0].start;
|
|
par->which_io = op->resource[0].flags & IORESOURCE_BITS;
|
|
|
|
sbusfb_fill_var(&info->var, dp, 32);
|
|
leo_fixup_var_rgb(&info->var);
|
|
|
|
linebytes = of_getintprop_default(dp, "linebytes",
|
|
info->var.xres);
|
|
info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres);
|
|
|
|
par->lc_ss0_usr =
|
|
of_ioremap(&op->resource[0], LEO_OFF_LC_SS0_USR,
|
|
0x1000, "leolc ss0usr");
|
|
par->ld_ss0 =
|
|
of_ioremap(&op->resource[0], LEO_OFF_LD_SS0,
|
|
0x1000, "leold ss0");
|
|
par->ld_ss1 =
|
|
of_ioremap(&op->resource[0], LEO_OFF_LD_SS1,
|
|
0x1000, "leold ss1");
|
|
par->lx_krn =
|
|
of_ioremap(&op->resource[0], LEO_OFF_LX_KRN,
|
|
0x1000, "leolx krn");
|
|
par->cursor =
|
|
of_ioremap(&op->resource[0], LEO_OFF_LX_CURSOR,
|
|
sizeof(struct leo_cursor), "leolx cursor");
|
|
info->screen_base =
|
|
of_ioremap(&op->resource[0], LEO_OFF_SS0,
|
|
0x800000, "leo ram");
|
|
if (!par->lc_ss0_usr ||
|
|
!par->ld_ss0 ||
|
|
!par->ld_ss1 ||
|
|
!par->lx_krn ||
|
|
!par->cursor ||
|
|
!info->screen_base)
|
|
goto out_unmap_regs;
|
|
|
|
info->flags = FBINFO_DEFAULT;
|
|
info->fbops = &leo_ops;
|
|
info->pseudo_palette = par->clut_data;
|
|
|
|
leo_init_wids(info);
|
|
leo_init_hw(info);
|
|
|
|
leo_blank(FB_BLANK_UNBLANK, info);
|
|
|
|
if (fb_alloc_cmap(&info->cmap, 256, 0))
|
|
goto out_unmap_regs;
|
|
|
|
leo_init_fix(info, dp);
|
|
|
|
err = register_framebuffer(info);
|
|
if (err < 0)
|
|
goto out_dealloc_cmap;
|
|
|
|
dev_set_drvdata(&op->dev, info);
|
|
|
|
printk(KERN_INFO "%pOF: leo at %lx:%lx\n",
|
|
dp,
|
|
par->which_io, info->fix.smem_start);
|
|
|
|
return 0;
|
|
|
|
out_dealloc_cmap:
|
|
fb_dealloc_cmap(&info->cmap);
|
|
|
|
out_unmap_regs:
|
|
leo_unmap_regs(op, info, par);
|
|
framebuffer_release(info);
|
|
|
|
out_err:
|
|
return err;
|
|
}
|
|
|
|
static void leo_remove(struct platform_device *op)
|
|
{
|
|
struct fb_info *info = dev_get_drvdata(&op->dev);
|
|
struct leo_par *par = info->par;
|
|
|
|
unregister_framebuffer(info);
|
|
fb_dealloc_cmap(&info->cmap);
|
|
|
|
leo_unmap_regs(op, info, par);
|
|
|
|
framebuffer_release(info);
|
|
}
|
|
|
|
static const struct of_device_id leo_match[] = {
|
|
{
|
|
.name = "SUNW,leo",
|
|
},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, leo_match);
|
|
|
|
static struct platform_driver leo_driver = {
|
|
.driver = {
|
|
.name = "leo",
|
|
.of_match_table = leo_match,
|
|
},
|
|
.probe = leo_probe,
|
|
.remove_new = leo_remove,
|
|
};
|
|
|
|
static int __init leo_init(void)
|
|
{
|
|
if (fb_get_options("leofb", NULL))
|
|
return -ENODEV;
|
|
|
|
return platform_driver_register(&leo_driver);
|
|
}
|
|
|
|
static void __exit leo_exit(void)
|
|
{
|
|
platform_driver_unregister(&leo_driver);
|
|
}
|
|
|
|
module_init(leo_init);
|
|
module_exit(leo_exit);
|
|
|
|
MODULE_DESCRIPTION("framebuffer driver for LEO chipsets");
|
|
MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
|
|
MODULE_VERSION("2.0");
|
|
MODULE_LICENSE("GPL");
|