1 files changed, 541 insertions, 0 deletions

diff --git a/drivers/video/fbdev/tcx.c b/drivers/video/fbdev/tcx.c
new file mode 100644
index 000000000000..7fb2d696fac7
--- /dev/null
+++ b/drivers/video/fbdev/tcx.c
@@ -0,0 +1,541 @@
+/* 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",
+                .owner = THIS_MODULE,
+                .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");