--- /dev/null
+/* 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_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_mmap(struct fb_info *, struct vm_area_struct *);
+static int p9100_ioctl(struct fb_info *, unsigned int, unsigned long);
+
+/*
+ * Frame buffer operations
+ */
+
+static struct fb_ops p9100_ops = {
+ .owner = THIS_MODULE,
+ .fb_setcolreg = p9100_setcolreg,
+ .fb_blank = p9100_blank,
+ .fb_fillrect = cfb_fillrect,
+ .fb_copyarea = cfb_copyarea,
+ .fb_imageblit = cfb_imageblit,
+ .fb_mmap = p9100_mmap,
+ .fb_ioctl = p9100_ioctl,
+#ifdef CONFIG_COMPAT
+ .fb_compat_ioctl = sbusfb_compat_ioctl,
+#endif
+};
+
+/* 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), ®s->ramdac_cmap_wridx);
+ sbus_writel((red << 16), ®s->ramdac_palette_data);
+ sbus_writel((green << 16), ®s->ramdac_palette_data);
+ sbus_writel((blue << 16), ®s->ramdac_palette_data);
+
+ spin_unlock_irqrestore(&par->lock, flags);
+
+ return 0;
+}
+
+/**
+ * p9100_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
+p9100_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(®s->vid_screenpaint_timectl1);
+ val |= SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
+ sbus_writel(val, ®s->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(®s->vid_screenpaint_timectl1);
+ val &= ~SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
+ sbus_writel(val, ®s->vid_screenpaint_timectl1);
+ par->flags |= P9100_FLAG_BLANKED;
+ break;
+ }
+
+ spin_unlock_irqrestore(&par->lock, flags);
+
+ return 0;
+}
+
+static struct sbus_mmap_map p9100_mmap_map[] = {
+ { CG3_MMAP_OFFSET, 0, SBUS_MMAP_FBSIZE(1) },
+ { 0, 0, 0 }
+};
+
+static int p9100_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_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)
+{
+ strlcpy(info->fix.id, dp->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_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->flags = FBINFO_DEFAULT;
+ 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 "%s: p9100 at %lx:%lx\n",
+ dp->full_name,
+ 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 int 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);
+
+ return 0;
+}
+
+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");
Code Review / kvmfornfv.git / blobdiff