// SPDX-License-Identifier: GPL-2.0-only /* p9100.c: P9100 frame buffer driver * * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net) * 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/delay.h> #include <linux/init.h> #include <linux/fb.h> #include <linux/mm.h> #include <linux/of_device.h> #include <asm/io.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 const 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 */ u32 sys_base; u32 sys_config; u32 sys_intr; u32 sys_int_ena; u32 sys_alt_rd; u32 sys_alt_wr; u32 sys_xxx[58]; /* Registers for the video control */ u32 vid_base; u32 vid_hcnt; u32 vid_htotal; u32 vid_hsync_rise; u32 vid_hblank_rise; u32 vid_hblank_fall; u32 vid_hcnt_preload; u32 vid_vcnt; u32 vid_vlen; u32 vid_vsync_rise; u32 vid_vblank_rise; u32 vid_vblank_fall; u32 vid_vcnt_preload; u32 vid_screenpaint_addr; u32 vid_screenpaint_timectl1; u32 vid_screenpaint_qsfcnt; u32 vid_screenpaint_timectl2; u32 vid_xxx[15]; /* Registers for the video control */ u32 vram_base; u32 vram_memcfg; u32 vram_refresh_pd; u32 vram_refresh_cnt; u32 vram_raslo_max; u32 vram_raslo_cur; u32 pwrup_cfg; u32 vram_xxx[25]; /* Registers for IBM RGB528 Palette */ u32 ramdac_cmap_wridx; u32 ramdac_palette_data; u32 ramdac_pixel_mask; u32 ramdac_palette_rdaddr; u32 ramdac_idx_lo; u32 ramdac_idx_hi; u32 ramdac_idx_data; u32 ramdac_idx_ctl; u32 ramdac_xxx[1784]; }; struct p9100_cmd_parameng { u32 parameng_status; u32 parameng_bltcmd; u32 parameng_quadcmd; }; struct p9100_par { spinlock_t lock; struct p9100_regs __iomem *regs; u32 flags; #define P9100_FLAG_BLANKED 0x00000001 unsigned long which_io; }; /** * 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, info->fix.smem_start, info->fix.smem_len, par->which_io, vma); } static int p9100_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg) { /* Make it look like a cg3. */ return sbusfb_ioctl_helper(cmd, arg, info, FBTYPE_SUN3COLOR, 8, info->fix.smem_len); } /* * Initialisation */ static void p9100_init_fix(struct fb_info *info, int linebytes, struct device_node *dp) { snprintf(info->fix.id, sizeof(info->fix.id), "%pOFn", dp); 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; } static int p9100_probe(struct platform_device *op) { struct device_node *dp = op->dev.of_node; struct fb_info *info; struct p9100_par *par; int linebytes, err; info = framebuffer_alloc(sizeof(struct p9100_par), &op->dev); err = -ENOMEM; if (!info) goto out_err; par = info->par; spin_lock_init(&par->lock); /* This is the framebuffer and the only resource apps can mmap. */ info->fix.smem_start = op->resource[2].start; par->which_io = op->resource[2].flags & IORESOURCE_BITS; sbusfb_fill_var(&info->var, dp, 8); info->var.red.length = 8; info->var.green.length = 8; info->var.blue.length = 8; linebytes = of_getintprop_default(dp, "linebytes", info->var.xres); info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres); par->regs = of_ioremap(&op->resource[0], 0, sizeof(struct p9100_regs), "p9100 regs"); if (!par->regs) goto out_release_fb; info->flags = FBINFO_DEFAULT; info->fbops = &p9100_ops; info->screen_base = of_ioremap(&op->resource[2], 0, info->fix.smem_len, "p9100 ram"); if (!info->screen_base) goto out_unmap_regs; p9100_blank(FB_BLANK_UNBLANK, info); if (fb_alloc_cmap(&info->cmap, 256, 0)) goto out_unmap_screen; p9100_init_fix(info, linebytes, dp); err = register_framebuffer(info); if (err < 0) goto out_dealloc_cmap; fb_set_cmap(&info->cmap, info); dev_set_drvdata(&op->dev, info); printk(KERN_INFO "%pOF: p9100 at %lx:%lx\n", dp, par->which_io, info->fix.smem_start); return 0; out_dealloc_cmap: fb_dealloc_cmap(&info->cmap); out_unmap_screen: of_iounmap(&op->resource[2], info->screen_base, info->fix.smem_len); out_unmap_regs: of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs)); out_release_fb: framebuffer_release(info); out_err: return err; } static int p9100_remove(struct platform_device *op) { struct fb_info *info = dev_get_drvdata(&op->dev); struct p9100_par *par = info->par; unregister_framebuffer(info); fb_dealloc_cmap(&info->cmap); of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs)); of_iounmap(&op->resource[2], info->screen_base, info->fix.smem_len); framebuffer_release(info); return 0; } static const struct of_device_id p9100_match[] = { { .name = "p9100", }, {}, }; MODULE_DEVICE_TABLE(of, p9100_match); static struct platform_driver p9100_driver = { .driver = { .name = "p9100", .of_match_table = p9100_match, }, .probe = p9100_probe, .remove = p9100_remove, }; static int __init p9100_init(void) { if (fb_get_options("p9100fb", NULL)) return -ENODEV; return platform_driver_register(&p9100_driver); } static void __exit p9100_exit(void) { platform_driver_unregister(&p9100_driver); } module_init(p9100_init); module_exit(p9100_exit); MODULE_DESCRIPTION("framebuffer driver for P9100 chipsets"); MODULE_AUTHOR("David S. Miller <davem@davemloft.net>"); MODULE_VERSION("2.0"); MODULE_LICENSE("GPL");