--- /dev/null
+/* tcx.c: TCX 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) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
+ * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
+ *
+ * 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 tcx_setcolreg(unsigned, unsigned, unsigned, unsigned,
+ unsigned, struct fb_info *);
+static int tcx_blank(int, struct fb_info *);
+
+static int tcx_mmap(struct fb_info *, struct vm_area_struct *);
+static int tcx_ioctl(struct fb_info *, unsigned int, unsigned long);
+static int tcx_pan_display(struct fb_var_screeninfo *, struct fb_info *);
+
+/*
+ * Frame buffer operations
+ */
+
+static struct fb_ops tcx_ops = {
+ .owner = THIS_MODULE,
+ .fb_setcolreg = tcx_setcolreg,
+ .fb_blank = tcx_blank,
+ .fb_pan_display = tcx_pan_display,
+ .fb_fillrect = cfb_fillrect,
+ .fb_copyarea = cfb_copyarea,
+ .fb_imageblit = cfb_imageblit,
+ .fb_mmap = tcx_mmap,
+ .fb_ioctl = tcx_ioctl,
+#ifdef CONFIG_COMPAT
+ .fb_compat_ioctl = sbusfb_compat_ioctl,
+#endif
+};
+
+/* THC definitions */
+#define TCX_THC_MISC_REV_SHIFT 16
+#define TCX_THC_MISC_REV_MASK 15
+#define TCX_THC_MISC_VSYNC_DIS (1 << 25)
+#define TCX_THC_MISC_HSYNC_DIS (1 << 24)
+#define TCX_THC_MISC_RESET (1 << 12)
+#define TCX_THC_MISC_VIDEO (1 << 10)
+#define TCX_THC_MISC_SYNC (1 << 9)
+#define TCX_THC_MISC_VSYNC (1 << 8)
+#define TCX_THC_MISC_SYNC_ENAB (1 << 7)
+#define TCX_THC_MISC_CURS_RES (1 << 6)
+#define TCX_THC_MISC_INT_ENAB (1 << 5)
+#define TCX_THC_MISC_INT (1 << 4)
+#define TCX_THC_MISC_INIT 0x9f
+#define TCX_THC_REV_REV_SHIFT 20
+#define TCX_THC_REV_REV_MASK 15
+#define TCX_THC_REV_MINREV_SHIFT 28
+#define TCX_THC_REV_MINREV_MASK 15
+
+/* The contents are unknown */
+struct tcx_tec {
+ u32 tec_matrix;
+ u32 tec_clip;
+ u32 tec_vdc;
+};
+
+struct tcx_thc {
+ u32 thc_rev;
+ u32 thc_pad0[511];
+ u32 thc_hs; /* hsync timing */
+ u32 thc_hsdvs;
+ u32 thc_hd;
+ u32 thc_vs; /* vsync timing */
+ u32 thc_vd;
+ u32 thc_refresh;
+ u32 thc_misc;
+ u32 thc_pad1[56];
+ u32 thc_cursxy; /* cursor x,y position (16 bits each) */
+ u32 thc_cursmask[32]; /* cursor mask bits */
+ u32 thc_cursbits[32]; /* what to show where mask enabled */
+};
+
+struct bt_regs {
+ u32 addr;
+ u32 color_map;
+ u32 control;
+ u32 cursor;
+};
+
+#define TCX_MMAP_ENTRIES 14
+
+struct tcx_par {
+ spinlock_t lock;
+ struct bt_regs __iomem *bt;
+ struct tcx_thc __iomem *thc;
+ struct tcx_tec __iomem *tec;
+ u32 __iomem *cplane;
+
+ u32 flags;
+#define TCX_FLAG_BLANKED 0x00000001
+
+ unsigned long which_io;
+
+ struct sbus_mmap_map mmap_map[TCX_MMAP_ENTRIES];
+ int lowdepth;
+};
+
+/* Reset control plane so that WID is 8-bit plane. */
+static void __tcx_set_control_plane(struct fb_info *info)
+{
+ struct tcx_par *par = info->par;
+ u32 __iomem *p, *pend;
+
+ if (par->lowdepth)
+ return;
+
+ p = par->cplane;
+ if (p == NULL)
+ return;
+ for (pend = p + info->fix.smem_len; p < pend; p++) {
+ u32 tmp = sbus_readl(p);
+
+ tmp &= 0xffffff;
+ sbus_writel(tmp, p);
+ }
+}
+
+static void tcx_reset(struct fb_info *info)
+{
+ struct tcx_par *par = (struct tcx_par *) info->par;
+ unsigned long flags;
+
+ spin_lock_irqsave(&par->lock, flags);
+ __tcx_set_control_plane(info);
+ spin_unlock_irqrestore(&par->lock, flags);
+}
+
+static int tcx_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+ tcx_reset(info);
+ return 0;
+}
+
+/**
+ * tcx_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 tcx_setcolreg(unsigned regno,
+ unsigned red, unsigned green, unsigned blue,
+ unsigned transp, struct fb_info *info)
+{
+ struct tcx_par *par = (struct tcx_par *) info->par;
+ struct bt_regs __iomem *bt = par->bt;
+ unsigned long flags;
+
+ if (regno >= 256)
+ return 1;
+
+ red >>= 8;
+ green >>= 8;
+ blue >>= 8;
+
+ spin_lock_irqsave(&par->lock, flags);
+
+ sbus_writel(regno << 24, &bt->addr);
+ sbus_writel(red << 24, &bt->color_map);
+ sbus_writel(green << 24, &bt->color_map);
+ sbus_writel(blue << 24, &bt->color_map);
+
+ spin_unlock_irqrestore(&par->lock, flags);
+
+ return 0;
+}
+
+/**
+ * tcx_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
+tcx_blank(int blank, struct fb_info *info)
+{
+ struct tcx_par *par = (struct tcx_par *) info->par;
+ struct tcx_thc __iomem *thc = par->thc;
+ unsigned long flags;
+ u32 val;
+
+ spin_lock_irqsave(&par->lock, flags);
+
+ val = sbus_readl(&thc->thc_misc);
+
+ switch (blank) {
+ case FB_BLANK_UNBLANK: /* Unblanking */
+ val &= ~(TCX_THC_MISC_VSYNC_DIS |
+ TCX_THC_MISC_HSYNC_DIS);
+ val |= TCX_THC_MISC_VIDEO;
+ par->flags &= ~TCX_FLAG_BLANKED;
+ break;
+
+ case FB_BLANK_NORMAL: /* Normal blanking */
+ val &= ~TCX_THC_MISC_VIDEO;
+ par->flags |= TCX_FLAG_BLANKED;
+ break;
+
+ case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
+ val |= TCX_THC_MISC_VSYNC_DIS;
+ break;
+ case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
+ val |= TCX_THC_MISC_HSYNC_DIS;
+ break;
+
+ case FB_BLANK_POWERDOWN: /* Poweroff */
+ break;
+ }
+
+ sbus_writel(val, &thc->thc_misc);
+
+ spin_unlock_irqrestore(&par->lock, flags);
+
+ return 0;
+}
+
+static struct sbus_mmap_map __tcx_mmap_map[TCX_MMAP_ENTRIES] = {
+ {
+ .voff = TCX_RAM8BIT,
+ .size = SBUS_MMAP_FBSIZE(1)
+ },
+ {
+ .voff = TCX_RAM24BIT,
+ .size = SBUS_MMAP_FBSIZE(4)
+ },
+ {
+ .voff = TCX_UNK3,
+ .size = SBUS_MMAP_FBSIZE(8)
+ },
+ {
+ .voff = TCX_UNK4,
+ .size = SBUS_MMAP_FBSIZE(8)
+ },
+ {
+ .voff = TCX_CONTROLPLANE,
+ .size = SBUS_MMAP_FBSIZE(4)
+ },
+ {
+ .voff = TCX_UNK6,
+ .size = SBUS_MMAP_FBSIZE(8)
+ },
+ {
+ .voff = TCX_UNK7,
+ .size = SBUS_MMAP_FBSIZE(8)
+ },
+ {
+ .voff = TCX_TEC,
+ .size = PAGE_SIZE
+ },
+ {
+ .voff = TCX_BTREGS,
+ .size = PAGE_SIZE
+ },
+ {
+ .voff = TCX_THC,
+ .size = PAGE_SIZE
+ },
+ {
+ .voff = TCX_DHC,
+ .size = PAGE_SIZE
+ },
+ {
+ .voff = TCX_ALT,
+ .size = PAGE_SIZE
+ },
+ {
+ .voff = TCX_UNK2,
+ .size = 0x20000
+ },
+ { .size = 0 }
+};
+
+static int tcx_mmap(struct fb_info *info, struct vm_area_struct *vma)
+{
+ struct tcx_par *par = (struct tcx_par *)info->par;
+
+ return sbusfb_mmap_helper(par->mmap_map,
+ info->fix.smem_start, info->fix.smem_len,
+ par->which_io, vma);
+}
+
+static int tcx_ioctl(struct fb_info *info, unsigned int cmd,
+ unsigned long arg)
+{
+ struct tcx_par *par = (struct tcx_par *) info->par;
+
+ return sbusfb_ioctl_helper(cmd, arg, info,
+ FBTYPE_TCXCOLOR,
+ (par->lowdepth ? 8 : 24),
+ info->fix.smem_len);
+}
+
+/*
+ * Initialisation
+ */
+
+static void
+tcx_init_fix(struct fb_info *info, int linebytes)
+{
+ struct tcx_par *par = (struct tcx_par *)info->par;
+ const char *tcx_name;
+
+ if (par->lowdepth)
+ tcx_name = "TCX8";
+ else
+ tcx_name = "TCX24";
+
+ strlcpy(info->fix.id, tcx_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_TCX;
+}
+
+static void tcx_unmap_regs(struct platform_device *op, struct fb_info *info,
+ struct tcx_par *par)
+{
+ if (par->tec)
+ of_iounmap(&op->resource[7],
+ par->tec, sizeof(struct tcx_tec));
+ if (par->thc)
+ of_iounmap(&op->resource[9],
+ par->thc, sizeof(struct tcx_thc));
+ if (par->bt)
+ of_iounmap(&op->resource[8],
+ par->bt, sizeof(struct bt_regs));
+ if (par->cplane)
+ of_iounmap(&op->resource[4],
+ par->cplane, info->fix.smem_len * sizeof(u32));
+ if (info->screen_base)
+ of_iounmap(&op->resource[0],
+ info->screen_base, info->fix.smem_len);
+}
+
+static int tcx_probe(struct platform_device *op)
+{
+ struct device_node *dp = op->dev.of_node;
+ struct fb_info *info;
+ struct tcx_par *par;
+ int linebytes, i, err;
+
+ info = framebuffer_alloc(sizeof(struct tcx_par), &op->dev);
+
+ err = -ENOMEM;
+ if (!info)
+ goto out_err;
+ par = info->par;
+
+ spin_lock_init(&par->lock);
+
+ par->lowdepth =
+ (of_find_property(dp, "tcx-8-bit", NULL) != NULL);
+
+ 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->tec = of_ioremap(&op->resource[7], 0,
+ sizeof(struct tcx_tec), "tcx tec");
+ par->thc = of_ioremap(&op->resource[9], 0,
+ sizeof(struct tcx_thc), "tcx thc");
+ par->bt = of_ioremap(&op->resource[8], 0,
+ sizeof(struct bt_regs), "tcx dac");
+ info->screen_base = of_ioremap(&op->resource[0], 0,
+ info->fix.smem_len, "tcx ram");
+ if (!par->tec || !par->thc ||
+ !par->bt || !info->screen_base)
+ goto out_unmap_regs;
+
+ memcpy(&par->mmap_map, &__tcx_mmap_map, sizeof(par->mmap_map));
+ if (!par->lowdepth) {
+ par->cplane = of_ioremap(&op->resource[4], 0,
+ info->fix.smem_len * sizeof(u32),
+ "tcx cplane");
+ if (!par->cplane)
+ goto out_unmap_regs;
+ } else {
+ par->mmap_map[1].size = SBUS_MMAP_EMPTY;
+ par->mmap_map[4].size = SBUS_MMAP_EMPTY;
+ par->mmap_map[5].size = SBUS_MMAP_EMPTY;
+ par->mmap_map[6].size = SBUS_MMAP_EMPTY;
+ }
+
+ info->fix.smem_start = op->resource[0].start;
+ par->which_io = op->resource[0].flags & IORESOURCE_BITS;
+
+ for (i = 0; i < TCX_MMAP_ENTRIES; i++) {
+ int j;
+
+ switch (i) {
+ case 10:
+ j = 12;
+ break;
+
+ case 11: case 12:
+ j = i - 1;
+ break;
+
+ default:
+ j = i;
+ break;
+ }
+ par->mmap_map[i].poff = op->resource[j].start;
+ }
+
+ info->flags = FBINFO_DEFAULT;
+ info->fbops = &tcx_ops;
+
+ /* Initialize brooktree DAC. */
+ sbus_writel(0x04 << 24, &par->bt->addr); /* color planes */
+ sbus_writel(0xff << 24, &par->bt->control);
+ sbus_writel(0x05 << 24, &par->bt->addr);
+ sbus_writel(0x00 << 24, &par->bt->control);
+ sbus_writel(0x06 << 24, &par->bt->addr); /* overlay plane */
+ sbus_writel(0x73 << 24, &par->bt->control);
+ sbus_writel(0x07 << 24, &par->bt->addr);
+ sbus_writel(0x00 << 24, &par->bt->control);
+
+ tcx_reset(info);
+
+ tcx_blank(FB_BLANK_UNBLANK, info);
+
+ if (fb_alloc_cmap(&info->cmap, 256, 0))
+ goto out_unmap_regs;
+
+ fb_set_cmap(&info->cmap, info);
+ tcx_init_fix(info, linebytes);
+
+ err = register_framebuffer(info);
+ if (err < 0)
+ goto out_dealloc_cmap;
+
+ dev_set_drvdata(&op->dev, info);
+
+ printk(KERN_INFO "%s: TCX at %lx:%lx, %s\n",
+ dp->full_name,
+ par->which_io,
+ info->fix.smem_start,
+ par->lowdepth ? "8-bit only" : "24-bit depth");
+
+ return 0;
+
+out_dealloc_cmap:
+ fb_dealloc_cmap(&info->cmap);
+
+out_unmap_regs:
+ tcx_unmap_regs(op, info, par);
+ framebuffer_release(info);
+
+out_err:
+ return err;
+}
+
+static int tcx_remove(struct platform_device *op)
+{
+ struct fb_info *info = dev_get_drvdata(&op->dev);
+ struct tcx_par *par = info->par;
+
+ unregister_framebuffer(info);
+ fb_dealloc_cmap(&info->cmap);
+
+ tcx_unmap_regs(op, info, par);
+
+ framebuffer_release(info);
+
+ return 0;
+}
+
+static const struct of_device_id tcx_match[] = {
+ {
+ .name = "SUNW,tcx",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, tcx_match);
+
+static struct platform_driver tcx_driver = {
+ .driver = {
+ .name = "tcx",
+ .of_match_table = tcx_match,
+ },
+ .probe = tcx_probe,
+ .remove = tcx_remove,
+};
+
+static int __init tcx_init(void)
+{
+ if (fb_get_options("tcxfb", NULL))
+ return -ENODEV;
+
+ return platform_driver_register(&tcx_driver);
+}
+
+static void __exit tcx_exit(void)
+{
+ platform_driver_unregister(&tcx_driver);
+}
+
+module_init(tcx_init);
+module_exit(tcx_exit);
+
+MODULE_DESCRIPTION("framebuffer driver for TCX chipsets");
+MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
+MODULE_VERSION("2.0");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff