1 files changed, 406 insertions, 0 deletions

diff --git a/drivers/video/fbdev/bw2.c b/drivers/video/fbdev/bw2.c
new file mode 100644
index 000000000000..bc123d6947a4
--- /dev/null
+++ b/drivers/video/fbdev/bw2.c
@@ -0,0 +1,406 @@
+/* bw2.c: BWTWO 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) 1997 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 bw2_blank(int, struct fb_info *);
+
+static int bw2_mmap(struct fb_info *, struct vm_area_struct *);
+static int bw2_ioctl(struct fb_info *, unsigned int, unsigned long);
+
+/*
+ *  Frame buffer operations
+ */
+
+static struct fb_ops bw2_ops = {
+        .owner                  = THIS_MODULE,
+        .fb_blank               = bw2_blank,
+        .fb_fillrect            = cfb_fillrect,
+        .fb_copyarea            = cfb_copyarea,
+        .fb_imageblit           = cfb_imageblit,
+        .fb_mmap                = bw2_mmap,
+        .fb_ioctl               = bw2_ioctl,
+#ifdef CONFIG_COMPAT
+        .fb_compat_ioctl        = sbusfb_compat_ioctl,
+#endif
+};
+
+/* OBio addresses for the bwtwo registers */
+#define BWTWO_REGISTER_OFFSET 0x400000
+
+struct bt_regs {
+        u32 addr;
+        u32 color_map;
+        u32 control;
+        u32 cursor;
+};
+
+struct bw2_regs {
+        struct bt_regs  cmap;
+        u8      control;
+        u8      status;
+        u8      cursor_start;
+        u8      cursor_end;
+        u8      h_blank_start;
+        u8      h_blank_end;
+        u8      h_sync_start;
+        u8      h_sync_end;
+        u8      comp_sync_end;
+        u8      v_blank_start_high;
+        u8      v_blank_start_low;
+        u8      v_blank_end;
+        u8      v_sync_start;
+        u8      v_sync_end;
+        u8      xfer_holdoff_start;
+        u8      xfer_holdoff_end;
+};
+
+/* Status Register Constants */
+#define BWTWO_SR_RES_MASK       0x70
+#define BWTWO_SR_1600_1280      0x50
+#define BWTWO_SR_1152_900_76_A  0x40
+#define BWTWO_SR_1152_900_76_B  0x60
+#define BWTWO_SR_ID_MASK        0x0f
+#define BWTWO_SR_ID_MONO        0x02
+#define BWTWO_SR_ID_MONO_ECL    0x03
+#define BWTWO_SR_ID_MSYNC       0x04
+#define BWTWO_SR_ID_NOCONN      0x0a
+
+/* Control Register Constants */
+#define BWTWO_CTL_ENABLE_INTS   0x80
+#define BWTWO_CTL_ENABLE_VIDEO  0x40
+#define BWTWO_CTL_ENABLE_TIMING 0x20
+#define BWTWO_CTL_ENABLE_CURCMP 0x10
+#define BWTWO_CTL_XTAL_MASK     0x0C
+#define BWTWO_CTL_DIVISOR_MASK  0x03
+
+/* Status Register Constants */
+#define BWTWO_STAT_PENDING_INT  0x80
+#define BWTWO_STAT_MSENSE_MASK  0x70
+#define BWTWO_STAT_ID_MASK      0x0f
+
+struct bw2_par {
+        spinlock_t              lock;
+        struct bw2_regs         __iomem *regs;
+
+        u32                     flags;
+#define BW2_FLAG_BLANKED        0x00000001
+
+        unsigned long           which_io;
+};
+
+/**
+ *      bw2_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
+bw2_blank(int blank, struct fb_info *info)
+{
+        struct bw2_par *par = (struct bw2_par *) info->par;
+        struct bw2_regs __iomem *regs = par->regs;
+        unsigned long flags;
+        u8 val;
+
+        spin_lock_irqsave(&par->lock, flags);
+
+        switch (blank) {
+        case FB_BLANK_UNBLANK: /* Unblanking */
+                val = sbus_readb(&regs->control);
+                val |= BWTWO_CTL_ENABLE_VIDEO;
+                sbus_writeb(val, &regs->control);
+                par->flags &= ~BW2_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_readb(&regs->control);
+                val &= ~BWTWO_CTL_ENABLE_VIDEO;
+                sbus_writeb(val, &regs->control);
+                par->flags |= BW2_FLAG_BLANKED;
+                break;
+        }
+
+        spin_unlock_irqrestore(&par->lock, flags);
+
+        return 0;
+}
+
+static struct sbus_mmap_map bw2_mmap_map[] = {
+        {
+                .size = SBUS_MMAP_FBSIZE(1)
+        },
+        { .size = 0 }
+};
+
+static int bw2_mmap(struct fb_info *info, struct vm_area_struct *vma)
+{
+        struct bw2_par *par = (struct bw2_par *)info->par;
+
+        return sbusfb_mmap_helper(bw2_mmap_map,
+                                  info->fix.smem_start, info->fix.smem_len,
+                                  par->which_io,
+                                  vma);
+}
+
+static int bw2_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
+{
+        return sbusfb_ioctl_helper(cmd, arg, info,
+                                   FBTYPE_SUN2BW, 1, info->fix.smem_len);
+}
+
+/*
+ *  Initialisation
+ */
+
+static void bw2_init_fix(struct fb_info *info, int linebytes)
+{
+        strlcpy(info->fix.id, "bwtwo", sizeof(info->fix.id));
+
+        info->fix.type = FB_TYPE_PACKED_PIXELS;
+        info->fix.visual = FB_VISUAL_MONO01;
+
+        info->fix.line_length = linebytes;
+
+        info->fix.accel = FB_ACCEL_SUN_BWTWO;
+}
+
+static u8 bw2regs_1600[] = {
+        0x14, 0x8b,     0x15, 0x28,     0x16, 0x03,     0x17, 0x13,
+        0x18, 0x7b,     0x19, 0x05,     0x1a, 0x34,     0x1b, 0x2e,
+        0x1c, 0x00,     0x1d, 0x0a,     0x1e, 0xff,     0x1f, 0x01,
+        0x10, 0x21,     0
+};
+
+static u8 bw2regs_ecl[] = {
+        0x14, 0x65,     0x15, 0x1e,     0x16, 0x04,     0x17, 0x0c,
+        0x18, 0x5e,     0x19, 0x03,     0x1a, 0xa7,     0x1b, 0x23,
+        0x1c, 0x00,     0x1d, 0x08,     0x1e, 0xff,     0x1f, 0x01,
+        0x10, 0x20,     0
+};
+
+static u8 bw2regs_analog[] = {
+        0x14, 0xbb,     0x15, 0x2b,     0x16, 0x03,     0x17, 0x13,
+        0x18, 0xb0,     0x19, 0x03,     0x1a, 0xa6,     0x1b, 0x22,
+        0x1c, 0x01,     0x1d, 0x05,     0x1e, 0xff,     0x1f, 0x01,
+        0x10, 0x20,     0
+};
+
+static u8 bw2regs_76hz[] = {
+        0x14, 0xb7,     0x15, 0x27,     0x16, 0x03,     0x17, 0x0f,
+        0x18, 0xae,     0x19, 0x03,     0x1a, 0xae,     0x1b, 0x2a,
+        0x1c, 0x01,     0x1d, 0x09,     0x1e, 0xff,     0x1f, 0x01,
+        0x10, 0x24,     0
+};
+
+static u8 bw2regs_66hz[] = {
+        0x14, 0xbb,     0x15, 0x2b,     0x16, 0x04,     0x17, 0x14,
+        0x18, 0xae,     0x19, 0x03,     0x1a, 0xa8,     0x1b, 0x24,
+        0x1c, 0x01,     0x1d, 0x05,     0x1e, 0xff,     0x1f, 0x01,
+        0x10, 0x20,     0
+};
+
+static int bw2_do_default_mode(struct bw2_par *par, struct fb_info *info,
+                               int *linebytes)
+{
+        u8 status, mon;
+        u8 *p;
+
+        status = sbus_readb(&par->regs->status);
+        mon = status & BWTWO_SR_RES_MASK;
+        switch (status & BWTWO_SR_ID_MASK) {
+        case BWTWO_SR_ID_MONO_ECL:
+                if (mon == BWTWO_SR_1600_1280) {
+                        p = bw2regs_1600;
+                        info->var.xres = info->var.xres_virtual = 1600;
+                        info->var.yres = info->var.yres_virtual = 1280;
+                        *linebytes = 1600 / 8;
+                } else
+                        p = bw2regs_ecl;
+                break;
+
+        case BWTWO_SR_ID_MONO:
+                p = bw2regs_analog;
+                break;
+
+        case BWTWO_SR_ID_MSYNC:
+                if (mon == BWTWO_SR_1152_900_76_A ||
+                    mon == BWTWO_SR_1152_900_76_B)
+                        p = bw2regs_76hz;
+                else
+                        p = bw2regs_66hz;
+                break;
+
+        case BWTWO_SR_ID_NOCONN:
+                return 0;
+
+        default:
+                printk(KERN_ERR "bw2: can't handle SR %02x\n",
+                       status);
+                return -EINVAL;
+        }
+        for ( ; *p; p += 2) {
+                u8 __iomem *regp = &((u8 __iomem *)par->regs)[p[0]];
+                sbus_writeb(p[1], regp);
+        }
+        return 0;
+}
+
+static int bw2_probe(struct platform_device *op)
+{
+        struct device_node *dp = op->dev.of_node;
+        struct fb_info *info;
+        struct bw2_par *par;
+        int linebytes, err;
+
+        info = framebuffer_alloc(sizeof(struct bw2_par), &op->dev);
+
+        err = -ENOMEM;
+        if (!info)
+                goto out_err;
+        par = info->par;
+
+        spin_lock_init(&par->lock);
+
+        info->fix.smem_start = op->resource[0].start;
+        par->which_io = op->resource[0].flags & IORESOURCE_BITS;
+
+        sbusfb_fill_var(&info->var, dp, 1);
+        linebytes = of_getintprop_default(dp, "linebytes",
+                                          info->var.xres);
+
+        info->var.red.length = info->var.green.length =
+                info->var.blue.length = info->var.bits_per_pixel;
+        info->var.red.offset = info->var.green.offset =
+                info->var.blue.offset = 0;
+
+        par->regs = of_ioremap(&op->resource[0], BWTWO_REGISTER_OFFSET,
+                               sizeof(struct bw2_regs), "bw2 regs");
+        if (!par->regs)
+                goto out_release_fb;
+
+        if (!of_find_property(dp, "width", NULL)) {
+                err = bw2_do_default_mode(par, info, &linebytes);
+                if (err)
+                        goto out_unmap_regs;
+        }
+
+        info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres);
+
+        info->flags = FBINFO_DEFAULT;
+        info->fbops = &bw2_ops;
+
+        info->screen_base = of_ioremap(&op->resource[0], 0,
+                                       info->fix.smem_len, "bw2 ram");
+        if (!info->screen_base) {
+                err = -ENOMEM;
+                goto out_unmap_regs;
+        }
+
+        bw2_blank(FB_BLANK_UNBLANK, info);
+
+        bw2_init_fix(info, linebytes);
+
+        err = register_framebuffer(info);
+        if (err < 0)
+                goto out_unmap_screen;
+
+        dev_set_drvdata(&op->dev, info);
+
+        printk(KERN_INFO "%s: bwtwo at %lx:%lx\n",
+               dp->full_name, par->which_io, info->fix.smem_start);
+
+        return 0;
+
+out_unmap_screen:
+        of_iounmap(&op->resource[0], info->screen_base, info->fix.smem_len);
+
+out_unmap_regs:
+        of_iounmap(&op->resource[0], par->regs, sizeof(struct bw2_regs));
+
+out_release_fb:
+        framebuffer_release(info);
+
+out_err:
+        return err;
+}
+
+static int bw2_remove(struct platform_device *op)
+{
+        struct fb_info *info = dev_get_drvdata(&op->dev);
+        struct bw2_par *par = info->par;
+
+        unregister_framebuffer(info);
+
+        of_iounmap(&op->resource[0], par->regs, sizeof(struct bw2_regs));
+        of_iounmap(&op->resource[0], info->screen_base, info->fix.smem_len);
+
+        framebuffer_release(info);
+
+        return 0;
+}
+
+static const struct of_device_id bw2_match[] = {
+        {
+                .name = "bwtwo",
+        },
+        {},
+};
+MODULE_DEVICE_TABLE(of, bw2_match);
+
+static struct platform_driver bw2_driver = {
+        .driver = {
+                .name = "bw2",
+                .owner = THIS_MODULE,
+                .of_match_table = bw2_match,
+        },
+        .probe          = bw2_probe,
+        .remove         = bw2_remove,
+};
+
+static int __init bw2_init(void)
+{
+        if (fb_get_options("bw2fb", NULL))
+                return -ENODEV;
+
+        return platform_driver_register(&bw2_driver);
+}
+
+static void __exit bw2_exit(void)
+{
+        platform_driver_unregister(&bw2_driver);
+}
+
+module_init(bw2_init);
+module_exit(bw2_exit);
+
+MODULE_DESCRIPTION("framebuffer driver for BWTWO chipsets");
+MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
+MODULE_VERSION("2.0");
+MODULE_LICENSE("GPL");