// 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.h>#include <linux/platform_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_sbusfb_mmap(struct fb_info *info, struct vm_area_struct *vma);static int p9100_sbusfb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg); /* *  Frame buffer operations */ static const struct fb_ops p9100_ops = {	.owner			= THIS_MODULE,	FB_DEFAULT_SBUS_OPS(p9100),	.fb_setcolreg		= p9100_setcolreg,	.fb_blank		= p9100_blank,}; /* 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), &regs->ramdac_cmap_wridx);	sbus_writel((red << 16), &regs->ramdac_palette_data);	sbus_writel((green << 16), &regs->ramdac_palette_data);	sbus_writel((blue << 16), &regs->ramdac_palette_data); 	spin_unlock_irqrestore(&par->lock, flags); 	return 0;} /** *      p9100_blank - Optional function.  Blanks the display. *      @blank: the blank mode we want. *      @info: frame buffer structure that represents a single frame buffer */static intp9100_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(&regs->vid_screenpaint_timectl1);		val |= SCREENPAINT_TIMECTL1_ENABLE_VIDEO;		sbus_writel(val, &regs->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(&regs->vid_screenpaint_timectl1);		val &= ~SCREENPAINT_TIMECTL1_ENABLE_VIDEO;		sbus_writel(val, &regs->vid_screenpaint_timectl1);		par->flags |= P9100_FLAG_BLANKED;		break;	} 	spin_unlock_irqrestore(&par->lock, flags); 	return 0;} static const struct sbus_mmap_map p9100_mmap_map[] = {	{ CG3_MMAP_OFFSET,	0,		SBUS_MMAP_FBSIZE(1) },	{ 0,			0,		0		    }}; static int p9100_sbusfb_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_sbusfb_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->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 void 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);} 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");