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382 lines
8.9 KiB
382 lines
8.9 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* p9100.c: P9100 frame buffer driver |
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* |
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* Copyright (C) 2003, 2006 David S. Miller ([email protected]) |
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* Copyright 1999 Derrick J Brashear ([email protected]) |
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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 p9100_setcolreg(unsigned, unsigned, unsigned, unsigned, |
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unsigned, struct fb_info *); |
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static int p9100_blank(int, struct fb_info *); |
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static int p9100_mmap(struct fb_info *, struct vm_area_struct *); |
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static int p9100_ioctl(struct fb_info *, unsigned int, unsigned long); |
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/* |
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* Frame buffer operations |
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*/ |
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static const struct fb_ops p9100_ops = { |
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.owner = THIS_MODULE, |
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.fb_setcolreg = p9100_setcolreg, |
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.fb_blank = p9100_blank, |
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.fb_fillrect = cfb_fillrect, |
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.fb_copyarea = cfb_copyarea, |
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.fb_imageblit = cfb_imageblit, |
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.fb_mmap = p9100_mmap, |
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.fb_ioctl = p9100_ioctl, |
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#ifdef CONFIG_COMPAT |
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.fb_compat_ioctl = sbusfb_compat_ioctl, |
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#endif |
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}; |
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/* P9100 control registers */ |
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#define P9100_SYSCTL_OFF 0x0UL |
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#define P9100_VIDEOCTL_OFF 0x100UL |
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#define P9100_VRAMCTL_OFF 0x180UL |
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#define P9100_RAMDAC_OFF 0x200UL |
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#define P9100_VIDEOCOPROC_OFF 0x400UL |
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/* P9100 command registers */ |
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#define P9100_CMD_OFF 0x0UL |
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/* P9100 framebuffer memory */ |
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#define P9100_FB_OFF 0x0UL |
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/* 3 bits: 2=8bpp 3=16bpp 5=32bpp 7=24bpp */ |
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#define SYS_CONFIG_PIXELSIZE_SHIFT 26 |
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#define SCREENPAINT_TIMECTL1_ENABLE_VIDEO 0x20 /* 0 = off, 1 = on */ |
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struct p9100_regs { |
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/* Registers for the system control */ |
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u32 sys_base; |
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u32 sys_config; |
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u32 sys_intr; |
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u32 sys_int_ena; |
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u32 sys_alt_rd; |
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u32 sys_alt_wr; |
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u32 sys_xxx[58]; |
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/* Registers for the video control */ |
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u32 vid_base; |
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u32 vid_hcnt; |
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u32 vid_htotal; |
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u32 vid_hsync_rise; |
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u32 vid_hblank_rise; |
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u32 vid_hblank_fall; |
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u32 vid_hcnt_preload; |
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u32 vid_vcnt; |
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u32 vid_vlen; |
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u32 vid_vsync_rise; |
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u32 vid_vblank_rise; |
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u32 vid_vblank_fall; |
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u32 vid_vcnt_preload; |
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u32 vid_screenpaint_addr; |
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u32 vid_screenpaint_timectl1; |
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u32 vid_screenpaint_qsfcnt; |
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u32 vid_screenpaint_timectl2; |
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u32 vid_xxx[15]; |
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/* Registers for the video control */ |
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u32 vram_base; |
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u32 vram_memcfg; |
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u32 vram_refresh_pd; |
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u32 vram_refresh_cnt; |
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u32 vram_raslo_max; |
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u32 vram_raslo_cur; |
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u32 pwrup_cfg; |
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u32 vram_xxx[25]; |
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/* Registers for IBM RGB528 Palette */ |
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u32 ramdac_cmap_wridx; |
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u32 ramdac_palette_data; |
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u32 ramdac_pixel_mask; |
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u32 ramdac_palette_rdaddr; |
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u32 ramdac_idx_lo; |
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u32 ramdac_idx_hi; |
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u32 ramdac_idx_data; |
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u32 ramdac_idx_ctl; |
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u32 ramdac_xxx[1784]; |
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}; |
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struct p9100_cmd_parameng { |
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u32 parameng_status; |
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u32 parameng_bltcmd; |
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u32 parameng_quadcmd; |
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}; |
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struct p9100_par { |
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spinlock_t lock; |
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struct p9100_regs __iomem *regs; |
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u32 flags; |
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#define P9100_FLAG_BLANKED 0x00000001 |
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unsigned long which_io; |
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}; |
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/** |
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* p9100_setcolreg - Optional function. Sets a color register. |
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* @regno: boolean, 0 copy local, 1 get_user() function |
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* @red: frame buffer colormap structure |
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* @green: The green value which can be up to 16 bits wide |
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* @blue: The blue value which can be up to 16 bits wide. |
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* @transp: If supported the alpha value which can be up to 16 bits wide. |
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* @info: frame buffer info structure |
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*/ |
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static int p9100_setcolreg(unsigned regno, |
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unsigned red, unsigned green, unsigned blue, |
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unsigned transp, struct fb_info *info) |
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{ |
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struct p9100_par *par = (struct p9100_par *) info->par; |
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struct p9100_regs __iomem *regs = par->regs; |
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unsigned long flags; |
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if (regno >= 256) |
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return 1; |
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red >>= 8; |
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green >>= 8; |
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blue >>= 8; |
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spin_lock_irqsave(&par->lock, flags); |
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sbus_writel((regno << 16), ®s->ramdac_cmap_wridx); |
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sbus_writel((red << 16), ®s->ramdac_palette_data); |
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sbus_writel((green << 16), ®s->ramdac_palette_data); |
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sbus_writel((blue << 16), ®s->ramdac_palette_data); |
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spin_unlock_irqrestore(&par->lock, flags); |
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return 0; |
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} |
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/** |
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* p9100_blank - Optional function. Blanks the display. |
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* @blank: the blank mode we want. |
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* @info: frame buffer structure that represents a single frame buffer |
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*/ |
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static int |
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p9100_blank(int blank, struct fb_info *info) |
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{ |
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struct p9100_par *par = (struct p9100_par *) info->par; |
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struct p9100_regs __iomem *regs = par->regs; |
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unsigned long flags; |
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u32 val; |
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spin_lock_irqsave(&par->lock, flags); |
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switch (blank) { |
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case FB_BLANK_UNBLANK: /* Unblanking */ |
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val = sbus_readl(®s->vid_screenpaint_timectl1); |
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val |= SCREENPAINT_TIMECTL1_ENABLE_VIDEO; |
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sbus_writel(val, ®s->vid_screenpaint_timectl1); |
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par->flags &= ~P9100_FLAG_BLANKED; |
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break; |
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case FB_BLANK_NORMAL: /* Normal blanking */ |
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case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */ |
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case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */ |
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case FB_BLANK_POWERDOWN: /* Poweroff */ |
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val = sbus_readl(®s->vid_screenpaint_timectl1); |
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val &= ~SCREENPAINT_TIMECTL1_ENABLE_VIDEO; |
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sbus_writel(val, ®s->vid_screenpaint_timectl1); |
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par->flags |= P9100_FLAG_BLANKED; |
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break; |
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} |
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spin_unlock_irqrestore(&par->lock, flags); |
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return 0; |
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} |
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static struct sbus_mmap_map p9100_mmap_map[] = { |
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{ CG3_MMAP_OFFSET, 0, SBUS_MMAP_FBSIZE(1) }, |
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{ 0, 0, 0 } |
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}; |
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static int p9100_mmap(struct fb_info *info, struct vm_area_struct *vma) |
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{ |
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struct p9100_par *par = (struct p9100_par *)info->par; |
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return sbusfb_mmap_helper(p9100_mmap_map, |
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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 p9100_ioctl(struct fb_info *info, unsigned int cmd, |
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unsigned long arg) |
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{ |
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/* Make it look like a cg3. */ |
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return sbusfb_ioctl_helper(cmd, arg, info, |
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FBTYPE_SUN3COLOR, 8, 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 p9100_init_fix(struct fb_info *info, int linebytes, 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_PSEUDOCOLOR; |
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info->fix.line_length = linebytes; |
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info->fix.accel = FB_ACCEL_SUN_CGTHREE; |
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} |
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static int p9100_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 p9100_par *par; |
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int linebytes, err; |
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info = framebuffer_alloc(sizeof(struct p9100_par), &op->dev); |
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err = -ENOMEM; |
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if (!info) |
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goto out_err; |
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par = info->par; |
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spin_lock_init(&par->lock); |
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/* This is the framebuffer and the only resource apps can mmap. */ |
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info->fix.smem_start = op->resource[2].start; |
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par->which_io = op->resource[2].flags & IORESOURCE_BITS; |
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sbusfb_fill_var(&info->var, dp, 8); |
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info->var.red.length = 8; |
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info->var.green.length = 8; |
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info->var.blue.length = 8; |
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linebytes = of_getintprop_default(dp, "linebytes", info->var.xres); |
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info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres); |
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par->regs = of_ioremap(&op->resource[0], 0, |
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sizeof(struct p9100_regs), "p9100 regs"); |
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if (!par->regs) |
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goto out_release_fb; |
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info->flags = FBINFO_DEFAULT; |
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info->fbops = &p9100_ops; |
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info->screen_base = of_ioremap(&op->resource[2], 0, |
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info->fix.smem_len, "p9100 ram"); |
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if (!info->screen_base) |
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goto out_unmap_regs; |
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p9100_blank(FB_BLANK_UNBLANK, info); |
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if (fb_alloc_cmap(&info->cmap, 256, 0)) |
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goto out_unmap_screen; |
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p9100_init_fix(info, linebytes, dp); |
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err = register_framebuffer(info); |
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if (err < 0) |
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goto out_dealloc_cmap; |
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fb_set_cmap(&info->cmap, info); |
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dev_set_drvdata(&op->dev, info); |
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printk(KERN_INFO "%pOF: p9100 at %lx:%lx\n", |
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dp, |
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par->which_io, info->fix.smem_start); |
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return 0; |
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out_dealloc_cmap: |
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fb_dealloc_cmap(&info->cmap); |
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out_unmap_screen: |
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of_iounmap(&op->resource[2], info->screen_base, info->fix.smem_len); |
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out_unmap_regs: |
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of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs)); |
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out_release_fb: |
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framebuffer_release(info); |
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out_err: |
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return err; |
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} |
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static int p9100_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 p9100_par *par = info->par; |
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unregister_framebuffer(info); |
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fb_dealloc_cmap(&info->cmap); |
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of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs)); |
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of_iounmap(&op->resource[2], info->screen_base, info->fix.smem_len); |
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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 p9100_match[] = { |
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{ |
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.name = "p9100", |
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}, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(of, p9100_match); |
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static struct platform_driver p9100_driver = { |
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.driver = { |
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.name = "p9100", |
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.of_match_table = p9100_match, |
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}, |
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.probe = p9100_probe, |
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.remove = p9100_remove, |
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}; |
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static int __init p9100_init(void) |
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{ |
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if (fb_get_options("p9100fb", NULL)) |
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return -ENODEV; |
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return platform_driver_register(&p9100_driver); |
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} |
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static void __exit p9100_exit(void) |
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{ |
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platform_driver_unregister(&p9100_driver); |
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} |
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module_init(p9100_init); |
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module_exit(p9100_exit); |
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MODULE_DESCRIPTION("framebuffer driver for P9100 chipsets"); |
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MODULE_AUTHOR("David S. Miller <[email protected]>"); |
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MODULE_VERSION("2.0"); |
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MODULE_LICENSE("GPL");
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