Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 622 insertions, 0 deletions

diff --git a/drivers/video/fbdev/cg14.c b/drivers/video/fbdev/cg14.c
new file mode 100644
index 0000000000..c0336c051c
--- /dev/null
+++ b/drivers/video/fbdev/cg14.c
@@ -0,0 +1,622 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* cg14.c: CGFOURTEEN frame buffer driver
+ *
+ * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
+ * Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz)
+ * Copyright (C) 1995 Miguel de Icaza (miguel@nuclecu.unam.mx)
+ *
+ * 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/uaccess.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 cg14_setcolreg(unsigned, unsigned, unsigned, unsigned,
+			 unsigned, struct fb_info *);
+
+static int cg14_mmap(struct fb_info *, struct vm_area_struct *);
+static int cg14_ioctl(struct fb_info *, unsigned int, unsigned long);
+static int cg14_pan_display(struct fb_var_screeninfo *, struct fb_info *);
+
+/*
+ *  Frame buffer operations
+ */
+
+static const struct fb_ops cg14_ops = {
+	.owner			= THIS_MODULE,
+	.fb_setcolreg		= cg14_setcolreg,
+	.fb_pan_display		= cg14_pan_display,
+	.fb_fillrect		= cfb_fillrect,
+	.fb_copyarea		= cfb_copyarea,
+	.fb_imageblit		= cfb_imageblit,
+	.fb_mmap		= cg14_mmap,
+	.fb_ioctl		= cg14_ioctl,
+#ifdef CONFIG_COMPAT
+	.fb_compat_ioctl	= sbusfb_compat_ioctl,
+#endif
+};
+
+#define CG14_MCR_INTENABLE_SHIFT	7
+#define CG14_MCR_INTENABLE_MASK		0x80
+#define CG14_MCR_VIDENABLE_SHIFT	6
+#define CG14_MCR_VIDENABLE_MASK		0x40
+#define CG14_MCR_PIXMODE_SHIFT		4
+#define CG14_MCR_PIXMODE_MASK		0x30
+#define CG14_MCR_TMR_SHIFT		2
+#define CG14_MCR_TMR_MASK		0x0c
+#define CG14_MCR_TMENABLE_SHIFT		1
+#define CG14_MCR_TMENABLE_MASK		0x02
+#define CG14_MCR_RESET_SHIFT		0
+#define CG14_MCR_RESET_MASK		0x01
+#define CG14_REV_REVISION_SHIFT		4
+#define CG14_REV_REVISION_MASK		0xf0
+#define CG14_REV_IMPL_SHIFT		0
+#define CG14_REV_IMPL_MASK		0x0f
+#define CG14_VBR_FRAMEBASE_SHIFT	12
+#define CG14_VBR_FRAMEBASE_MASK		0x00fff000
+#define CG14_VMCR1_SETUP_SHIFT		0
+#define CG14_VMCR1_SETUP_MASK		0x000001ff
+#define CG14_VMCR1_VCONFIG_SHIFT	9
+#define CG14_VMCR1_VCONFIG_MASK		0x00000e00
+#define CG14_VMCR2_REFRESH_SHIFT	0
+#define CG14_VMCR2_REFRESH_MASK		0x00000001
+#define CG14_VMCR2_TESTROWCNT_SHIFT	1
+#define CG14_VMCR2_TESTROWCNT_MASK	0x00000002
+#define CG14_VMCR2_FBCONFIG_SHIFT	2
+#define CG14_VMCR2_FBCONFIG_MASK	0x0000000c
+#define CG14_VCR_REFRESHREQ_SHIFT	0
+#define CG14_VCR_REFRESHREQ_MASK	0x000003ff
+#define CG14_VCR1_REFRESHENA_SHIFT	10
+#define CG14_VCR1_REFRESHENA_MASK	0x00000400
+#define CG14_VCA_CAD_SHIFT		0
+#define CG14_VCA_CAD_MASK		0x000003ff
+#define CG14_VCA_VERS_SHIFT		10
+#define CG14_VCA_VERS_MASK		0x00000c00
+#define CG14_VCA_RAMSPEED_SHIFT		12
+#define CG14_VCA_RAMSPEED_MASK		0x00001000
+#define CG14_VCA_8MB_SHIFT		13
+#define CG14_VCA_8MB_MASK		0x00002000
+
+#define CG14_MCR_PIXMODE_8		0
+#define CG14_MCR_PIXMODE_16		2
+#define CG14_MCR_PIXMODE_32		3
+
+struct cg14_regs{
+	u8 mcr;	/* Master Control Reg */
+	u8 ppr;	/* Packed Pixel Reg */
+	u8 tms[2];	/* Test Mode Status Regs */
+	u8 msr;	/* Master Status Reg */
+	u8 fsr;	/* Fault Status Reg */
+	u8 rev;	/* Revision & Impl */
+	u8 ccr;	/* Clock Control Reg */
+	u32 tmr;	/* Test Mode Read Back */
+	u8 mod;	/* Monitor Operation Data Reg */
+	u8 acr;	/* Aux Control */
+	u8 xxx0[6];
+	u16 hct;	/* Hor Counter */
+	u16 vct;	/* Vert Counter */
+	u16 hbs;	/* Hor Blank Start */
+	u16 hbc;	/* Hor Blank Clear */
+	u16 hss;	/* Hor Sync Start */
+	u16 hsc;	/* Hor Sync Clear */
+	u16 csc;	/* Composite Sync Clear */
+	u16 vbs;	/* Vert Blank Start */
+	u16 vbc;	/* Vert Blank Clear */
+	u16 vss;	/* Vert Sync Start */
+	u16 vsc;	/* Vert Sync Clear */
+	u16 xcs;
+	u16 xcc;
+	u16 fsa;	/* Fault Status Address */
+	u16 adr;	/* Address Registers */
+	u8 xxx1[0xce];
+	u8 pcg[0x100]; /* Pixel Clock Generator */
+	u32 vbr;	/* Frame Base Row */
+	u32 vmcr;	/* VBC Master Control */
+	u32 vcr;	/* VBC refresh */
+	u32 vca;	/* VBC Config */
+};
+
+#define CG14_CCR_ENABLE	0x04
+#define CG14_CCR_SELECT 0x02	/* HW/Full screen */
+
+struct cg14_cursor {
+	u32 cpl0[32];	/* Enable plane 0 */
+	u32 cpl1[32];  /* Color selection plane */
+	u8 ccr;	/* Cursor Control Reg */
+	u8 xxx0[3];
+	u16 cursx;	/* Cursor x,y position */
+	u16 cursy;	/* Cursor x,y position */
+	u32 color0;
+	u32 color1;
+	u32 xxx1[0x1bc];
+	u32 cpl0i[32];	/* Enable plane 0 autoinc */
+	u32 cpl1i[32]; /* Color selection autoinc */
+};
+
+struct cg14_dac {
+	u8 addr;	/* Address Register */
+	u8 xxx0[255];
+	u8 glut;	/* Gamma table */
+	u8 xxx1[255];
+	u8 select;	/* Register Select */
+	u8 xxx2[255];
+	u8 mode;	/* Mode Register */
+};
+
+struct cg14_xlut{
+	u8 x_xlut [256];
+	u8 x_xlutd [256];
+	u8 xxx0[0x600];
+	u8 x_xlut_inc [256];
+	u8 x_xlutd_inc [256];
+};
+
+/* Color look up table (clut) */
+/* Each one of these arrays hold the color lookup table (for 256
+ * colors) for each MDI page (I assume then there should be 4 MDI
+ * pages, I still wonder what they are.  I have seen NeXTStep split
+ * the screen in four parts, while operating in 24 bits mode.  Each
+ * integer holds 4 values: alpha value (transparency channel, thanks
+ * go to John Stone (johns@umr.edu) from OpenBSD), red, green and blue
+ *
+ * I currently use the clut instead of the Xlut
+ */
+struct cg14_clut {
+	u32 c_clut [256];
+	u32 c_clutd [256];    /* i wonder what the 'd' is for */
+	u32 c_clut_inc [256];
+	u32 c_clutd_inc [256];
+};
+
+#define CG14_MMAP_ENTRIES	16
+
+struct cg14_par {
+	spinlock_t		lock;
+	struct cg14_regs	__iomem *regs;
+	struct cg14_clut	__iomem *clut;
+	struct cg14_cursor	__iomem *cursor;
+
+	u32			flags;
+#define CG14_FLAG_BLANKED	0x00000001
+
+	unsigned long		iospace;
+
+	struct sbus_mmap_map	mmap_map[CG14_MMAP_ENTRIES];
+
+	int			mode;
+	int			ramsize;
+};
+
+static void __cg14_reset(struct cg14_par *par)
+{
+	struct cg14_regs __iomem *regs = par->regs;
+	u8 val;
+
+	val = sbus_readb(&regs->mcr);
+	val &= ~(CG14_MCR_PIXMODE_MASK);
+	sbus_writeb(val, &regs->mcr);
+}
+
+static int cg14_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	struct cg14_par *par = (struct cg14_par *) info->par;
+	unsigned long flags;
+
+	/* We just use this to catch switches out of
+	 * graphics mode.
+	 */
+	spin_lock_irqsave(&par->lock, flags);
+	__cg14_reset(par);
+	spin_unlock_irqrestore(&par->lock, flags);
+
+	if (var->xoffset || var->yoffset || var->vmode)
+		return -EINVAL;
+	return 0;
+}
+
+/**
+ *      cg14_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 cg14_setcolreg(unsigned regno,
+			  unsigned red, unsigned green, unsigned blue,
+			  unsigned transp, struct fb_info *info)
+{
+	struct cg14_par *par = (struct cg14_par *) info->par;
+	struct cg14_clut __iomem *clut = par->clut;
+	unsigned long flags;
+	u32 val;
+
+	if (regno >= 256)
+		return 1;
+
+	red >>= 8;
+	green >>= 8;
+	blue >>= 8;
+	val = (red | (green << 8) | (blue << 16));
+
+	spin_lock_irqsave(&par->lock, flags);
+	sbus_writel(val, &clut->c_clut[regno]);
+	spin_unlock_irqrestore(&par->lock, flags);
+
+	return 0;
+}
+
+static int cg14_mmap(struct fb_info *info, struct vm_area_struct *vma)
+{
+	struct cg14_par *par = (struct cg14_par *) info->par;
+
+	return sbusfb_mmap_helper(par->mmap_map,
+				  info->fix.smem_start, info->fix.smem_len,
+				  par->iospace, vma);
+}
+
+static int cg14_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
+{
+	struct cg14_par *par = (struct cg14_par *) info->par;
+	struct cg14_regs __iomem *regs = par->regs;
+	struct mdi_cfginfo kmdi, __user *mdii;
+	unsigned long flags;
+	int cur_mode, mode, ret = 0;
+
+	switch (cmd) {
+	case MDI_RESET:
+		spin_lock_irqsave(&par->lock, flags);
+		__cg14_reset(par);
+		spin_unlock_irqrestore(&par->lock, flags);
+		break;
+
+	case MDI_GET_CFGINFO:
+		memset(&kmdi, 0, sizeof(kmdi));
+
+		spin_lock_irqsave(&par->lock, flags);
+		kmdi.mdi_type = FBTYPE_MDICOLOR;
+		kmdi.mdi_height = info->var.yres;
+		kmdi.mdi_width = info->var.xres;
+		kmdi.mdi_mode = par->mode;
+		kmdi.mdi_pixfreq = 72; /* FIXME */
+		kmdi.mdi_size = par->ramsize;
+		spin_unlock_irqrestore(&par->lock, flags);
+
+		mdii = (struct mdi_cfginfo __user *) arg;
+		if (copy_to_user(mdii, &kmdi, sizeof(kmdi)))
+			ret = -EFAULT;
+		break;
+
+	case MDI_SET_PIXELMODE:
+		if (get_user(mode, (int __user *) arg)) {
+			ret = -EFAULT;
+			break;
+		}
+
+		spin_lock_irqsave(&par->lock, flags);
+		cur_mode = sbus_readb(&regs->mcr);
+		cur_mode &= ~CG14_MCR_PIXMODE_MASK;
+		switch(mode) {
+		case MDI_32_PIX:
+			cur_mode |= (CG14_MCR_PIXMODE_32 <<
+				     CG14_MCR_PIXMODE_SHIFT);
+			break;
+
+		case MDI_16_PIX:
+			cur_mode |= (CG14_MCR_PIXMODE_16 <<
+				     CG14_MCR_PIXMODE_SHIFT);
+			break;
+
+		case MDI_8_PIX:
+			break;
+
+		default:
+			ret = -ENOSYS;
+			break;
+		}
+		if (!ret) {
+			sbus_writeb(cur_mode, &regs->mcr);
+			par->mode = mode;
+		}
+		spin_unlock_irqrestore(&par->lock, flags);
+		break;
+
+	default:
+		ret = sbusfb_ioctl_helper(cmd, arg, info,
+					  FBTYPE_MDICOLOR, 8,
+					  info->fix.smem_len);
+		break;
+	}
+
+	return ret;
+}
+
+/*
+ *  Initialisation
+ */
+
+static void cg14_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_CG14;
+}
+
+static struct sbus_mmap_map __cg14_mmap_map[CG14_MMAP_ENTRIES] = {
+	{
+		.voff	= CG14_REGS,
+		.poff	= 0x80000000,
+		.size	= 0x1000
+	},
+	{
+		.voff	= CG14_XLUT,
+		.poff	= 0x80003000,
+		.size	= 0x1000
+	},
+	{
+		.voff	= CG14_CLUT1,
+		.poff	= 0x80004000,
+		.size	= 0x1000
+	},
+	{
+		.voff	= CG14_CLUT2,
+		.poff	= 0x80005000,
+		.size	= 0x1000
+	},
+	{
+		.voff	= CG14_CLUT3,
+		.poff	= 0x80006000,
+		.size	= 0x1000
+	},
+	{
+		.voff	= CG3_MMAP_OFFSET - 0x7000,
+		.poff	= 0x80000000,
+		.size	= 0x7000
+	},
+	{
+		.voff	= CG3_MMAP_OFFSET,
+		.poff	= 0x00000000,
+		.size	= SBUS_MMAP_FBSIZE(1)
+	},
+	{
+		.voff	= MDI_CURSOR_MAP,
+		.poff	= 0x80001000,
+		.size	= 0x1000
+	},
+	{
+		.voff	= MDI_CHUNKY_BGR_MAP,
+		.poff	= 0x01000000,
+		.size	= 0x400000
+	},
+	{
+		.voff	= MDI_PLANAR_X16_MAP,
+		.poff	= 0x02000000,
+		.size	= 0x200000
+	},
+	{
+		.voff	= MDI_PLANAR_C16_MAP,
+		.poff	= 0x02800000,
+		.size	= 0x200000
+	},
+	{
+		.voff	= MDI_PLANAR_X32_MAP,
+		.poff	= 0x03000000,
+		.size	= 0x100000
+	},
+	{
+		.voff	= MDI_PLANAR_B32_MAP,
+		.poff	= 0x03400000,
+		.size	= 0x100000
+	},
+	{
+		.voff	= MDI_PLANAR_G32_MAP,
+		.poff	= 0x03800000,
+		.size	= 0x100000
+	},
+	{
+		.voff	= MDI_PLANAR_R32_MAP,
+		.poff	= 0x03c00000,
+		.size	= 0x100000
+	},
+	{ .size = 0 }
+};
+
+static void cg14_unmap_regs(struct platform_device *op, struct fb_info *info,
+			    struct cg14_par *par)
+{
+	if (par->regs)
+		of_iounmap(&op->resource[0],
+			   par->regs, sizeof(struct cg14_regs));
+	if (par->clut)
+		of_iounmap(&op->resource[0],
+			   par->clut, sizeof(struct cg14_clut));
+	if (par->cursor)
+		of_iounmap(&op->resource[0],
+			   par->cursor, sizeof(struct cg14_cursor));
+	if (info->screen_base)
+		of_iounmap(&op->resource[1],
+			   info->screen_base, info->fix.smem_len);
+}
+
+static int cg14_probe(struct platform_device *op)
+{
+	struct device_node *dp = op->dev.of_node;
+	struct fb_info *info;
+	struct cg14_par *par;
+	int is_8mb, linebytes, i, err;
+
+	info = framebuffer_alloc(sizeof(struct cg14_par), &op->dev);
+
+	err = -ENOMEM;
+	if (!info)
+		goto out_err;
+	par = info->par;
+
+	spin_lock_init(&par->lock);
+
+	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);
+
+	if (of_node_name_eq(dp->parent, "sbus") ||
+	    of_node_name_eq(dp->parent, "sbi")) {
+		info->fix.smem_start = op->resource[0].start;
+		par->iospace = op->resource[0].flags & IORESOURCE_BITS;
+	} else {
+		info->fix.smem_start = op->resource[1].start;
+		par->iospace = op->resource[0].flags & IORESOURCE_BITS;
+	}
+
+	par->regs = of_ioremap(&op->resource[0], 0,
+			       sizeof(struct cg14_regs), "cg14 regs");
+	par->clut = of_ioremap(&op->resource[0], CG14_CLUT1,
+			       sizeof(struct cg14_clut), "cg14 clut");
+	par->cursor = of_ioremap(&op->resource[0], CG14_CURSORREGS,
+				 sizeof(struct cg14_cursor), "cg14 cursor");
+
+	info->screen_base = of_ioremap(&op->resource[1], 0,
+				       info->fix.smem_len, "cg14 ram");
+
+	if (!par->regs || !par->clut || !par->cursor || !info->screen_base)
+		goto out_unmap_regs;
+
+	is_8mb = (resource_size(&op->resource[1]) == (8 * 1024 * 1024));
+
+	BUILD_BUG_ON(sizeof(par->mmap_map) != sizeof(__cg14_mmap_map));
+
+	memcpy(&par->mmap_map, &__cg14_mmap_map, sizeof(par->mmap_map));
+
+	for (i = 0; i < CG14_MMAP_ENTRIES; i++) {
+		struct sbus_mmap_map *map = &par->mmap_map[i];
+
+		if (!map->size)
+			break;
+		if (map->poff & 0x80000000)
+			map->poff = (map->poff & 0x7fffffff) +
+				(op->resource[0].start -
+				 op->resource[1].start);
+		if (is_8mb &&
+		    map->size >= 0x100000 &&
+		    map->size <= 0x400000)
+			map->size *= 2;
+	}
+
+	par->mode = MDI_8_PIX;
+	par->ramsize = (is_8mb ? 0x800000 : 0x400000);
+
+	info->flags = FBINFO_HWACCEL_YPAN;
+	info->fbops = &cg14_ops;
+
+	__cg14_reset(par);
+
+	if (fb_alloc_cmap(&info->cmap, 256, 0))
+		goto out_unmap_regs;
+
+	fb_set_cmap(&info->cmap, info);
+
+	cg14_init_fix(info, linebytes, dp);
+
+	err = register_framebuffer(info);
+	if (err < 0)
+		goto out_dealloc_cmap;
+
+	dev_set_drvdata(&op->dev, info);
+
+	printk(KERN_INFO "%pOF: cgfourteen at %lx:%lx, %dMB\n",
+	       dp,
+	       par->iospace, info->fix.smem_start,
+	       par->ramsize >> 20);
+
+	return 0;
+
+out_dealloc_cmap:
+	fb_dealloc_cmap(&info->cmap);
+
+out_unmap_regs:
+	cg14_unmap_regs(op, info, par);
+	framebuffer_release(info);
+
+out_err:
+	return err;
+}
+
+static void cg14_remove(struct platform_device *op)
+{
+	struct fb_info *info = dev_get_drvdata(&op->dev);
+	struct cg14_par *par = info->par;
+
+	unregister_framebuffer(info);
+	fb_dealloc_cmap(&info->cmap);
+
+	cg14_unmap_regs(op, info, par);
+
+	framebuffer_release(info);
+}
+
+static const struct of_device_id cg14_match[] = {
+	{
+		.name = "cgfourteen",
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(of, cg14_match);
+
+static struct platform_driver cg14_driver = {
+	.driver = {
+		.name = "cg14",
+		.of_match_table = cg14_match,
+	},
+	.probe		= cg14_probe,
+	.remove_new	= cg14_remove,
+};
+
+static int __init cg14_init(void)
+{
+	if (fb_get_options("cg14fb", NULL))
+		return -ENODEV;
+
+	return platform_driver_register(&cg14_driver);
+}
+
+static void __exit cg14_exit(void)
+{
+	platform_driver_unregister(&cg14_driver);
+}
+
+module_init(cg14_init);
+module_exit(cg14_exit);
+
+MODULE_DESCRIPTION("framebuffer driver for CGfourteen chipsets");
+MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
+MODULE_VERSION("2.0");
+MODULE_LICENSE("GPL");