/* p9100.c: P9100 frame buffer driver * * Copyright (C) 2003 David S. Miller (davem@redhat.com) * Copyright 1999 Derrick J Brashear (shadow@dementia.org) * * Driver layout based loosely on tgafb.c, see that file for credits. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/errno.h> #include <linux/string.h> #include <linux/slab.h> #include <linux/delay.h> #include <linux/init.h> #include <linux/fb.h> #include <linux/mm.h> #include <asm/io.h> #include <asm/sbus.h> #include <asm/oplib.h> #include <asm/fbio.h> #include "sbuslib.h" /* * Local functions. */ static int p9100_setcolreg(unsigned, unsigned, unsigned, unsigned, unsigned, struct fb_info *); static int p9100_blank(int, struct fb_info *); static int p9100_mmap(struct fb_info *, struct vm_area_struct *); static int p9100_ioctl(struct fb_info *, unsigned int, unsigned long); /* * Frame buffer operations */ static struct fb_ops p9100_ops = { .owner = THIS_MODULE, .fb_setcolreg = p9100_setcolreg, .fb_blank = p9100_blank, .fb_fillrect = cfb_fillrect, .fb_copyarea = cfb_copyarea, .fb_imageblit = cfb_imageblit, .fb_mmap = p9100_mmap, .fb_ioctl = p9100_ioctl, #ifdef CONFIG_COMPAT .fb_compat_ioctl = sbusfb_compat_ioctl, #endif }; /* P9100 control registers */ #define P9100_SYSCTL_OFF 0x0UL #define P9100_VIDEOCTL_OFF 0x100UL #define P9100_VRAMCTL_OFF 0x180UL #define P9100_RAMDAC_OFF 0x200UL #define P9100_VIDEOCOPROC_OFF 0x400UL /* P9100 command registers */ #define P9100_CMD_OFF 0x0UL /* P9100 framebuffer memory */ #define P9100_FB_OFF 0x0UL /* 3 bits: 2=8bpp 3=16bpp 5=32bpp 7=24bpp */ #define SYS_CONFIG_PIXELSIZE_SHIFT 26 #define SCREENPAINT_TIMECTL1_ENABLE_VIDEO 0x20 /* 0 = off, 1 = on */ struct p9100_regs { /* Registers for the system control */ volatile u32 sys_base; volatile u32 sys_config; volatile u32 sys_intr; volatile u32 sys_int_ena; volatile u32 sys_alt_rd; volatile u32 sys_alt_wr; volatile u32 sys_xxx[58]; /* Registers for the video control */ volatile u32 vid_base; volatile u32 vid_hcnt; volatile u32 vid_htotal; volatile u32 vid_hsync_rise; volatile u32 vid_hblank_rise; volatile u32 vid_hblank_fall; volatile u32 vid_hcnt_preload; volatile u32 vid_vcnt; volatile u32 vid_vlen; volatile u32 vid_vsync_rise; volatile u32 vid_vblank_rise; volatile u32 vid_vblank_fall; volatile u32 vid_vcnt_preload; volatile u32 vid_screenpaint_addr; volatile u32 vid_screenpaint_timectl1; volatile u32 vid_screenpaint_qsfcnt; volatile u32 vid_screenpaint_timectl2; volatile u32 vid_xxx[15]; /* Registers for the video control */ volatile u32 vram_base; volatile u32 vram_memcfg; volatile u32 vram_refresh_pd; volatile u32 vram_refresh_cnt; volatile u32 vram_raslo_max; volatile u32 vram_raslo_cur; volatile u32 pwrup_cfg; volatile u32 vram_xxx[25]; /* Registers for IBM RGB528 Palette */ volatile u32 ramdac_cmap_wridx; volatile u32 ramdac_palette_data; volatile u32 ramdac_pixel_mask; volatile u32 ramdac_palette_rdaddr; volatile u32 ramdac_idx_lo; volatile u32 ramdac_idx_hi; volatile u32 ramdac_idx_data; volatile u32 ramdac_idx_ctl; volatile u32 ramdac_xxx[1784]; }; struct p9100_cmd_parameng { volatile u32 parameng_status; volatile u32 parameng_bltcmd; volatile u32 parameng_quadcmd; }; struct p9100_par { spinlock_t lock; struct p9100_regs __iomem *regs; u32 flags; #define P9100_FLAG_BLANKED 0x00000001 unsigned long physbase; unsigned long fbsize; struct sbus_dev *sdev; }; /** * p9100_setcolreg - Optional function. Sets a color register. * @regno: boolean, 0 copy local, 1 get_user() function * @red: frame buffer colormap structure * @green: The green value which can be up to 16 bits wide * @blue: The blue value which can be up to 16 bits wide. * @transp: If supported the alpha value which can be up to 16 bits wide. * @info: frame buffer info structure */ static int p9100_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *info) { struct p9100_par *par = (struct p9100_par *) info->par; struct p9100_regs __iomem *regs = par->regs; unsigned long flags; if (regno >= 256) return 1; red >>= 8; green >>= 8; blue >>= 8; spin_lock_irqsave(&par->lock, flags); sbus_writel((regno << 16), ®s->ramdac_cmap_wridx); sbus_writel((red << 16), ®s->ramdac_palette_data); sbus_writel((green << 16), ®s->ramdac_palette_data); sbus_writel((blue << 16), ®s->ramdac_palette_data); spin_unlock_irqrestore(&par->lock, flags); return 0; } /** * p9100_blank - Optional function. Blanks the display. * @blank_mode: the blank mode we want. * @info: frame buffer structure that represents a single frame buffer */ static int p9100_blank(int blank, struct fb_info *info) { struct p9100_par *par = (struct p9100_par *) info->par; struct p9100_regs __iomem *regs = par->regs; unsigned long flags; u32 val; spin_lock_irqsave(&par->lock, flags); switch (blank) { case FB_BLANK_UNBLANK: /* Unblanking */ val = sbus_readl(®s->vid_screenpaint_timectl1); val |= SCREENPAINT_TIMECTL1_ENABLE_VIDEO; sbus_writel(val, ®s->vid_screenpaint_timectl1); par->flags &= ~P9100_FLAG_BLANKED; break; case FB_BLANK_NORMAL: /* Normal blanking */ case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */ case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */ case FB_BLANK_POWERDOWN: /* Poweroff */ val = sbus_readl(®s->vid_screenpaint_timectl1); val &= ~SCREENPAINT_TIMECTL1_ENABLE_VIDEO; sbus_writel(val, ®s->vid_screenpaint_timectl1); par->flags |= P9100_FLAG_BLANKED; break; } spin_unlock_irqrestore(&par->lock, flags); return 0; } static struct sbus_mmap_map p9100_mmap_map[] = { { CG3_MMAP_OFFSET, 0, SBUS_MMAP_FBSIZE(1) }, { 0, 0, 0 } }; static int p9100_mmap(struct fb_info *info, struct vm_area_struct *vma) { struct p9100_par *par = (struct p9100_par *)info->par; return sbusfb_mmap_helper(p9100_mmap_map, par->physbase, par->fbsize, par->sdev->reg_addrs[0].which_io, vma); } static int p9100_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg) { struct p9100_par *par = (struct p9100_par *) info->par; /* Make it look like a cg3. */ return sbusfb_ioctl_helper(cmd, arg, info, FBTYPE_SUN3COLOR, 8, par->fbsize); } /* * Initialisation */ static void p9100_init_fix(struct fb_info *info, int linebytes) { struct p9100_par *par = (struct p9100_par *)info->par; strlcpy(info->fix.id, par->sdev->prom_name, sizeof(info->fix.id)); info->fix.type = FB_TYPE_PACKED_PIXELS; info->fix.visual = FB_VISUAL_PSEUDOCOLOR; info->fix.line_length = linebytes; info->fix.accel = FB_ACCEL_SUN_CGTHREE; } struct all_info { struct fb_info info; struct p9100_par par; struct list_head list; }; static LIST_HEAD(p9100_list); static void p9100_init_one(struct sbus_dev *sdev) { struct all_info *all; int linebytes; all = kmalloc(sizeof(*all), GFP_KERNEL); if (!all) { printk(KERN_ERR "p9100: Cannot allocate memory.\n"); return; } memset(all, 0, sizeof(*all)); INIT_LIST_HEAD(&all->list); spin_lock_init(&all->par.lock); all->par.sdev = sdev; /* This is the framebuffer and the only resource apps can mmap. */ all->par.physbase = sdev->reg_addrs[2].phys_addr; sbusfb_fill_var(&all->info.var, sdev->prom_node, 8); all->info.var.red.length = 8; all->info.var.green.length = 8; all->info.var.blue.length = 8; linebytes = prom_getintdefault(sdev->prom_node, "linebytes", all->info.var.xres); all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres); all->par.regs = sbus_ioremap(&sdev->resource[0], 0, sizeof(struct p9100_regs), "p9100 regs"); all->info.flags = FBINFO_DEFAULT; all->info.fbops = &p9100_ops; #ifdef CONFIG_SPARC32 all->info.screen_base = (char __iomem *) prom_getintdefault(sdev->prom_node, "address", 0); #endif if (!all->info.screen_base) all->info.screen_base = sbus_ioremap(&sdev->resource[2], 0, all->par.fbsize, "p9100 ram"); all->info.par = &all->par; p9100_blank(0, &all->info); if (fb_alloc_cmap(&all->info.cmap, 256, 0)) { printk(KERN_ERR "p9100: Could not allocate color map.\n"); kfree(all); return; } p9100_init_fix(&all->info, linebytes); if (register_framebuffer(&all->info) < 0) { printk(KERN_ERR "p9100: Could not register framebuffer.\n"); fb_dealloc_cmap(&all->info.cmap); kfree(all); return; } fb_set_cmap(&all->info.cmap, &all->info); list_add(&all->list, &p9100_list); printk("p9100: %s at %lx:%lx\n", sdev->prom_name, (long) sdev->reg_addrs[0].which_io, (long) sdev->reg_addrs[0].phys_addr); } int __init p9100_init(void) { struct sbus_bus *sbus; struct sbus_dev *sdev; if (fb_get_options("p9100fb", NULL)) return -ENODEV; for_all_sbusdev(sdev, sbus) { if (!strcmp(sdev->prom_name, "p9100")) p9100_init_one(sdev); } return 0; } void __exit p9100_exit(void) { struct list_head *pos, *tmp; list_for_each_safe(pos, tmp, &p9100_list) { struct all_info *all = list_entry(pos, typeof(*all), list); unregister_framebuffer(&all->info); fb_dealloc_cmap(&all->info.cmap); kfree(all); } } int __init p9100_setup(char *arg) { /* No cmdline options yet... */ return 0; } module_init(p9100_init); #ifdef MODULE module_exit(p9100_exit); #endif MODULE_DESCRIPTION("framebuffer driver for P9100 chipsets"); MODULE_AUTHOR("David S. Miller <davem@redhat.com>"); MODULE_LICENSE("GPL");