--- /dev/null
+/* 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_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 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(®s->mcr);
+ val &= ~(CG14_MCR_PIXMODE_MASK);
+ sbus_writeb(val, ®s->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(®s->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, ®s->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)
+{
+ const char *name = dp->name;
+
+ strlcpy(info->fix.id, 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_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 (!strcmp(dp->parent->name, "sbus") ||
+ !strcmp(dp->parent->name, "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 = (((op->resource[1].end - op->resource[1].start) + 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_DEFAULT | 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 "%s: cgfourteen at %lx:%lx, %dMB\n",
+ dp->full_name,
+ 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 int 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);
+
+ return 0;
+}
+
+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 = 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");
Code Review / kvmfornfv.git / blobdiff