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-rw-r--r--drivers/video/fbdev/cg6.c885
1 files changed, 885 insertions, 0 deletions
diff --git a/drivers/video/fbdev/cg6.c b/drivers/video/fbdev/cg6.c
new file mode 100644
index 000000000..97ef43c25
--- /dev/null
+++ b/drivers/video/fbdev/cg6.c
@@ -0,0 +1,885 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* cg6.c: CGSIX (GX, GXplus, TGX) 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 cg6_setcolreg(unsigned, unsigned, unsigned, unsigned,
+ unsigned, struct fb_info *);
+static int cg6_blank(int, struct fb_info *);
+
+static void cg6_imageblit(struct fb_info *, const struct fb_image *);
+static void cg6_fillrect(struct fb_info *, const struct fb_fillrect *);
+static void cg6_copyarea(struct fb_info *info, const struct fb_copyarea *area);
+static int cg6_sync(struct fb_info *);
+static int cg6_mmap(struct fb_info *, struct vm_area_struct *);
+static int cg6_ioctl(struct fb_info *, unsigned int, unsigned long);
+static int cg6_pan_display(struct fb_var_screeninfo *, struct fb_info *);
+
+/*
+ * Frame buffer operations
+ */
+
+static const struct fb_ops cg6_ops = {
+ .owner = THIS_MODULE,
+ .fb_setcolreg = cg6_setcolreg,
+ .fb_blank = cg6_blank,
+ .fb_pan_display = cg6_pan_display,
+ .fb_fillrect = cg6_fillrect,
+ .fb_copyarea = cg6_copyarea,
+ .fb_imageblit = cg6_imageblit,
+ .fb_sync = cg6_sync,
+ .fb_mmap = cg6_mmap,
+ .fb_ioctl = cg6_ioctl,
+#ifdef CONFIG_COMPAT
+ .fb_compat_ioctl = sbusfb_compat_ioctl,
+#endif
+};
+
+/* Offset of interesting structures in the OBIO space */
+/*
+ * Brooktree is the video dac and is funny to program on the cg6.
+ * (it's even funnier on the cg3)
+ * The FBC could be the frame buffer control
+ * The FHC could is the frame buffer hardware control.
+ */
+#define CG6_ROM_OFFSET 0x0UL
+#define CG6_BROOKTREE_OFFSET 0x200000UL
+#define CG6_DHC_OFFSET 0x240000UL
+#define CG6_ALT_OFFSET 0x280000UL
+#define CG6_FHC_OFFSET 0x300000UL
+#define CG6_THC_OFFSET 0x301000UL
+#define CG6_FBC_OFFSET 0x700000UL
+#define CG6_TEC_OFFSET 0x701000UL
+#define CG6_RAM_OFFSET 0x800000UL
+
+/* FHC definitions */
+#define CG6_FHC_FBID_SHIFT 24
+#define CG6_FHC_FBID_MASK 255
+#define CG6_FHC_REV_SHIFT 20
+#define CG6_FHC_REV_MASK 15
+#define CG6_FHC_FROP_DISABLE (1 << 19)
+#define CG6_FHC_ROW_DISABLE (1 << 18)
+#define CG6_FHC_SRC_DISABLE (1 << 17)
+#define CG6_FHC_DST_DISABLE (1 << 16)
+#define CG6_FHC_RESET (1 << 15)
+#define CG6_FHC_LITTLE_ENDIAN (1 << 13)
+#define CG6_FHC_RES_MASK (3 << 11)
+#define CG6_FHC_1024 (0 << 11)
+#define CG6_FHC_1152 (1 << 11)
+#define CG6_FHC_1280 (2 << 11)
+#define CG6_FHC_1600 (3 << 11)
+#define CG6_FHC_CPU_MASK (3 << 9)
+#define CG6_FHC_CPU_SPARC (0 << 9)
+#define CG6_FHC_CPU_68020 (1 << 9)
+#define CG6_FHC_CPU_386 (2 << 9)
+#define CG6_FHC_TEST (1 << 8)
+#define CG6_FHC_TEST_X_SHIFT 4
+#define CG6_FHC_TEST_X_MASK 15
+#define CG6_FHC_TEST_Y_SHIFT 0
+#define CG6_FHC_TEST_Y_MASK 15
+
+/* FBC mode definitions */
+#define CG6_FBC_BLIT_IGNORE 0x00000000
+#define CG6_FBC_BLIT_NOSRC 0x00100000
+#define CG6_FBC_BLIT_SRC 0x00200000
+#define CG6_FBC_BLIT_ILLEGAL 0x00300000
+#define CG6_FBC_BLIT_MASK 0x00300000
+
+#define CG6_FBC_VBLANK 0x00080000
+
+#define CG6_FBC_MODE_IGNORE 0x00000000
+#define CG6_FBC_MODE_COLOR8 0x00020000
+#define CG6_FBC_MODE_COLOR1 0x00040000
+#define CG6_FBC_MODE_HRMONO 0x00060000
+#define CG6_FBC_MODE_MASK 0x00060000
+
+#define CG6_FBC_DRAW_IGNORE 0x00000000
+#define CG6_FBC_DRAW_RENDER 0x00008000
+#define CG6_FBC_DRAW_PICK 0x00010000
+#define CG6_FBC_DRAW_ILLEGAL 0x00018000
+#define CG6_FBC_DRAW_MASK 0x00018000
+
+#define CG6_FBC_BWRITE0_IGNORE 0x00000000
+#define CG6_FBC_BWRITE0_ENABLE 0x00002000
+#define CG6_FBC_BWRITE0_DISABLE 0x00004000
+#define CG6_FBC_BWRITE0_ILLEGAL 0x00006000
+#define CG6_FBC_BWRITE0_MASK 0x00006000
+
+#define CG6_FBC_BWRITE1_IGNORE 0x00000000
+#define CG6_FBC_BWRITE1_ENABLE 0x00000800
+#define CG6_FBC_BWRITE1_DISABLE 0x00001000
+#define CG6_FBC_BWRITE1_ILLEGAL 0x00001800
+#define CG6_FBC_BWRITE1_MASK 0x00001800
+
+#define CG6_FBC_BREAD_IGNORE 0x00000000
+#define CG6_FBC_BREAD_0 0x00000200
+#define CG6_FBC_BREAD_1 0x00000400
+#define CG6_FBC_BREAD_ILLEGAL 0x00000600
+#define CG6_FBC_BREAD_MASK 0x00000600
+
+#define CG6_FBC_BDISP_IGNORE 0x00000000
+#define CG6_FBC_BDISP_0 0x00000080
+#define CG6_FBC_BDISP_1 0x00000100
+#define CG6_FBC_BDISP_ILLEGAL 0x00000180
+#define CG6_FBC_BDISP_MASK 0x00000180
+
+#define CG6_FBC_INDEX_MOD 0x00000040
+#define CG6_FBC_INDEX_MASK 0x00000030
+
+/* THC definitions */
+#define CG6_THC_MISC_REV_SHIFT 16
+#define CG6_THC_MISC_REV_MASK 15
+#define CG6_THC_MISC_RESET (1 << 12)
+#define CG6_THC_MISC_VIDEO (1 << 10)
+#define CG6_THC_MISC_SYNC (1 << 9)
+#define CG6_THC_MISC_VSYNC (1 << 8)
+#define CG6_THC_MISC_SYNC_ENAB (1 << 7)
+#define CG6_THC_MISC_CURS_RES (1 << 6)
+#define CG6_THC_MISC_INT_ENAB (1 << 5)
+#define CG6_THC_MISC_INT (1 << 4)
+#define CG6_THC_MISC_INIT 0x9f
+#define CG6_THC_CURSOFF ((65536-32) | ((65536-32) << 16))
+
+/* The contents are unknown */
+struct cg6_tec {
+ int tec_matrix;
+ int tec_clip;
+ int tec_vdc;
+};
+
+struct cg6_thc {
+ u32 thc_pad0[512];
+ 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 cg6_fbc {
+ u32 xxx0[1];
+ u32 mode;
+ u32 clip;
+ u32 xxx1[1];
+ u32 s;
+ u32 draw;
+ u32 blit;
+ u32 font;
+ u32 xxx2[24];
+ u32 x0, y0, z0, color0;
+ u32 x1, y1, z1, color1;
+ u32 x2, y2, z2, color2;
+ u32 x3, y3, z3, color3;
+ u32 offx, offy;
+ u32 xxx3[2];
+ u32 incx, incy;
+ u32 xxx4[2];
+ u32 clipminx, clipminy;
+ u32 xxx5[2];
+ u32 clipmaxx, clipmaxy;
+ u32 xxx6[2];
+ u32 fg;
+ u32 bg;
+ u32 alu;
+ u32 pm;
+ u32 pixelm;
+ u32 xxx7[2];
+ u32 patalign;
+ u32 pattern[8];
+ u32 xxx8[432];
+ u32 apointx, apointy, apointz;
+ u32 xxx9[1];
+ u32 rpointx, rpointy, rpointz;
+ u32 xxx10[5];
+ u32 pointr, pointg, pointb, pointa;
+ u32 alinex, aliney, alinez;
+ u32 xxx11[1];
+ u32 rlinex, rliney, rlinez;
+ u32 xxx12[5];
+ u32 liner, lineg, lineb, linea;
+ u32 atrix, atriy, atriz;
+ u32 xxx13[1];
+ u32 rtrix, rtriy, rtriz;
+ u32 xxx14[5];
+ u32 trir, trig, trib, tria;
+ u32 aquadx, aquady, aquadz;
+ u32 xxx15[1];
+ u32 rquadx, rquady, rquadz;
+ u32 xxx16[5];
+ u32 quadr, quadg, quadb, quada;
+ u32 arectx, arecty, arectz;
+ u32 xxx17[1];
+ u32 rrectx, rrecty, rrectz;
+ u32 xxx18[5];
+ u32 rectr, rectg, rectb, recta;
+};
+
+struct bt_regs {
+ u32 addr;
+ u32 color_map;
+ u32 control;
+ u32 cursor;
+};
+
+struct cg6_par {
+ spinlock_t lock;
+ struct bt_regs __iomem *bt;
+ struct cg6_fbc __iomem *fbc;
+ struct cg6_thc __iomem *thc;
+ struct cg6_tec __iomem *tec;
+ u32 __iomem *fhc;
+
+ u32 flags;
+#define CG6_FLAG_BLANKED 0x00000001
+
+ unsigned long which_io;
+};
+
+static int cg6_sync(struct fb_info *info)
+{
+ struct cg6_par *par = (struct cg6_par *)info->par;
+ struct cg6_fbc __iomem *fbc = par->fbc;
+ int limit = 10000;
+
+ do {
+ if (!(sbus_readl(&fbc->s) & 0x10000000))
+ break;
+ udelay(10);
+ } while (--limit > 0);
+
+ return 0;
+}
+
+static void cg6_switch_from_graph(struct cg6_par *par)
+{
+ struct cg6_thc __iomem *thc = par->thc;
+ unsigned long flags;
+
+ spin_lock_irqsave(&par->lock, flags);
+
+ /* Hide the cursor. */
+ sbus_writel(CG6_THC_CURSOFF, &thc->thc_cursxy);
+
+ spin_unlock_irqrestore(&par->lock, flags);
+}
+
+static int cg6_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+ struct cg6_par *par = (struct cg6_par *)info->par;
+
+ /* We just use this to catch switches out of
+ * graphics mode.
+ */
+ cg6_switch_from_graph(par);
+
+ if (var->xoffset || var->yoffset || var->vmode)
+ return -EINVAL;
+ return 0;
+}
+
+/**
+ * cg6_fillrect - Draws a rectangle on the screen.
+ *
+ * @info: frame buffer structure that represents a single frame buffer
+ * @rect: structure defining the rectagle and operation.
+ */
+static void cg6_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
+{
+ struct cg6_par *par = (struct cg6_par *)info->par;
+ struct cg6_fbc __iomem *fbc = par->fbc;
+ unsigned long flags;
+ s32 val;
+
+ /* CG6 doesn't handle ROP_XOR */
+
+ spin_lock_irqsave(&par->lock, flags);
+
+ cg6_sync(info);
+
+ sbus_writel(rect->color, &fbc->fg);
+ sbus_writel(~(u32)0, &fbc->pixelm);
+ sbus_writel(0xea80ff00, &fbc->alu);
+ sbus_writel(0, &fbc->s);
+ sbus_writel(0, &fbc->clip);
+ sbus_writel(~(u32)0, &fbc->pm);
+ sbus_writel(rect->dy, &fbc->arecty);
+ sbus_writel(rect->dx, &fbc->arectx);
+ sbus_writel(rect->dy + rect->height, &fbc->arecty);
+ sbus_writel(rect->dx + rect->width, &fbc->arectx);
+ do {
+ val = sbus_readl(&fbc->draw);
+ } while (val < 0 && (val & 0x20000000));
+ spin_unlock_irqrestore(&par->lock, flags);
+}
+
+/**
+ * cg6_copyarea - Copies one area of the screen to another area.
+ *
+ * @info: frame buffer structure that represents a single frame buffer
+ * @area: Structure providing the data to copy the framebuffer contents
+ * from one region to another.
+ *
+ * This drawing operation copies a rectangular area from one area of the
+ * screen to another area.
+ */
+static void cg6_copyarea(struct fb_info *info, const struct fb_copyarea *area)
+{
+ struct cg6_par *par = (struct cg6_par *)info->par;
+ struct cg6_fbc __iomem *fbc = par->fbc;
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&par->lock, flags);
+
+ cg6_sync(info);
+
+ sbus_writel(0xff, &fbc->fg);
+ sbus_writel(0x00, &fbc->bg);
+ sbus_writel(~0, &fbc->pixelm);
+ sbus_writel(0xe880cccc, &fbc->alu);
+ sbus_writel(0, &fbc->s);
+ sbus_writel(0, &fbc->clip);
+
+ sbus_writel(area->sy, &fbc->y0);
+ sbus_writel(area->sx, &fbc->x0);
+ sbus_writel(area->sy + area->height - 1, &fbc->y1);
+ sbus_writel(area->sx + area->width - 1, &fbc->x1);
+ sbus_writel(area->dy, &fbc->y2);
+ sbus_writel(area->dx, &fbc->x2);
+ sbus_writel(area->dy + area->height - 1, &fbc->y3);
+ sbus_writel(area->dx + area->width - 1, &fbc->x3);
+ do {
+ i = sbus_readl(&fbc->blit);
+ } while (i < 0 && (i & 0x20000000));
+ spin_unlock_irqrestore(&par->lock, flags);
+}
+
+/**
+ * cg6_imageblit - Copies a image from system memory to the screen.
+ *
+ * @info: frame buffer structure that represents a single frame buffer
+ * @image: structure defining the image.
+ */
+static void cg6_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+ struct cg6_par *par = (struct cg6_par *)info->par;
+ struct cg6_fbc __iomem *fbc = par->fbc;
+ const u8 *data = image->data;
+ unsigned long flags;
+ u32 x, y;
+ int i, width;
+
+ if (image->depth > 1) {
+ cfb_imageblit(info, image);
+ return;
+ }
+
+ spin_lock_irqsave(&par->lock, flags);
+
+ cg6_sync(info);
+
+ sbus_writel(image->fg_color, &fbc->fg);
+ sbus_writel(image->bg_color, &fbc->bg);
+ sbus_writel(0x140000, &fbc->mode);
+ sbus_writel(0xe880fc30, &fbc->alu);
+ sbus_writel(~(u32)0, &fbc->pixelm);
+ sbus_writel(0, &fbc->s);
+ sbus_writel(0, &fbc->clip);
+ sbus_writel(0xff, &fbc->pm);
+ sbus_writel(32, &fbc->incx);
+ sbus_writel(0, &fbc->incy);
+
+ x = image->dx;
+ y = image->dy;
+ for (i = 0; i < image->height; i++) {
+ width = image->width;
+
+ while (width >= 32) {
+ u32 val;
+
+ sbus_writel(y, &fbc->y0);
+ sbus_writel(x, &fbc->x0);
+ sbus_writel(x + 32 - 1, &fbc->x1);
+
+ val = ((u32)data[0] << 24) |
+ ((u32)data[1] << 16) |
+ ((u32)data[2] << 8) |
+ ((u32)data[3] << 0);
+ sbus_writel(val, &fbc->font);
+
+ data += 4;
+ x += 32;
+ width -= 32;
+ }
+ if (width) {
+ u32 val;
+
+ sbus_writel(y, &fbc->y0);
+ sbus_writel(x, &fbc->x0);
+ sbus_writel(x + width - 1, &fbc->x1);
+ if (width <= 8) {
+ val = (u32) data[0] << 24;
+ data += 1;
+ } else if (width <= 16) {
+ val = ((u32) data[0] << 24) |
+ ((u32) data[1] << 16);
+ data += 2;
+ } else {
+ val = ((u32) data[0] << 24) |
+ ((u32) data[1] << 16) |
+ ((u32) data[2] << 8);
+ data += 3;
+ }
+ sbus_writel(val, &fbc->font);
+ }
+
+ y += 1;
+ x = image->dx;
+ }
+
+ spin_unlock_irqrestore(&par->lock, flags);
+}
+
+/**
+ * cg6_setcolreg - 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 cg6_setcolreg(unsigned regno,
+ unsigned red, unsigned green, unsigned blue,
+ unsigned transp, struct fb_info *info)
+{
+ struct cg6_par *par = (struct cg6_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((u32)regno << 24, &bt->addr);
+ sbus_writel((u32)red << 24, &bt->color_map);
+ sbus_writel((u32)green << 24, &bt->color_map);
+ sbus_writel((u32)blue << 24, &bt->color_map);
+
+ spin_unlock_irqrestore(&par->lock, flags);
+
+ return 0;
+}
+
+/**
+ * cg6_blank - Blanks the display.
+ *
+ * @blank: the blank mode we want.
+ * @info: frame buffer structure that represents a single frame buffer
+ */
+static int cg6_blank(int blank, struct fb_info *info)
+{
+ struct cg6_par *par = (struct cg6_par *)info->par;
+ struct cg6_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 |= CG6_THC_MISC_VIDEO;
+ par->flags &= ~CG6_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 &= ~CG6_THC_MISC_VIDEO;
+ par->flags |= CG6_FLAG_BLANKED;
+ break;
+ }
+
+ sbus_writel(val, &thc->thc_misc);
+ spin_unlock_irqrestore(&par->lock, flags);
+
+ return 0;
+}
+
+static struct sbus_mmap_map cg6_mmap_map[] = {
+ {
+ .voff = CG6_FBC,
+ .poff = CG6_FBC_OFFSET,
+ .size = PAGE_SIZE
+ },
+ {
+ .voff = CG6_TEC,
+ .poff = CG6_TEC_OFFSET,
+ .size = PAGE_SIZE
+ },
+ {
+ .voff = CG6_BTREGS,
+ .poff = CG6_BROOKTREE_OFFSET,
+ .size = PAGE_SIZE
+ },
+ {
+ .voff = CG6_FHC,
+ .poff = CG6_FHC_OFFSET,
+ .size = PAGE_SIZE
+ },
+ {
+ .voff = CG6_THC,
+ .poff = CG6_THC_OFFSET,
+ .size = PAGE_SIZE
+ },
+ {
+ .voff = CG6_ROM,
+ .poff = CG6_ROM_OFFSET,
+ .size = 0x10000
+ },
+ {
+ .voff = CG6_RAM,
+ .poff = CG6_RAM_OFFSET,
+ .size = SBUS_MMAP_FBSIZE(1)
+ },
+ {
+ .voff = CG6_DHC,
+ .poff = CG6_DHC_OFFSET,
+ .size = 0x40000
+ },
+ { .size = 0 }
+};
+
+static int cg6_mmap(struct fb_info *info, struct vm_area_struct *vma)
+{
+ struct cg6_par *par = (struct cg6_par *)info->par;
+
+ return sbusfb_mmap_helper(cg6_mmap_map,
+ info->fix.smem_start, info->fix.smem_len,
+ par->which_io, vma);
+}
+
+static int cg6_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
+{
+ return sbusfb_ioctl_helper(cmd, arg, info,
+ FBTYPE_SUNFAST_COLOR, 8, info->fix.smem_len);
+}
+
+/*
+ * Initialisation
+ */
+
+static void cg6_init_fix(struct fb_info *info, int linebytes)
+{
+ struct cg6_par *par = (struct cg6_par *)info->par;
+ const char *cg6_cpu_name, *cg6_card_name;
+ u32 conf;
+
+ conf = sbus_readl(par->fhc);
+ switch (conf & CG6_FHC_CPU_MASK) {
+ case CG6_FHC_CPU_SPARC:
+ cg6_cpu_name = "sparc";
+ break;
+ case CG6_FHC_CPU_68020:
+ cg6_cpu_name = "68020";
+ break;
+ default:
+ cg6_cpu_name = "i386";
+ break;
+ }
+ if (((conf >> CG6_FHC_REV_SHIFT) & CG6_FHC_REV_MASK) >= 11) {
+ if (info->fix.smem_len <= 0x100000)
+ cg6_card_name = "TGX";
+ else
+ cg6_card_name = "TGX+";
+ } else {
+ if (info->fix.smem_len <= 0x100000)
+ cg6_card_name = "GX";
+ else
+ cg6_card_name = "GX+";
+ }
+
+ sprintf(info->fix.id, "%s %s", cg6_card_name, cg6_cpu_name);
+ info->fix.id[sizeof(info->fix.id) - 1] = 0;
+
+ info->fix.type = FB_TYPE_PACKED_PIXELS;
+ info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
+
+ info->fix.line_length = linebytes;
+
+ info->fix.accel = FB_ACCEL_SUN_CGSIX;
+}
+
+/* Initialize Brooktree DAC */
+static void cg6_bt_init(struct cg6_par *par)
+{
+ struct bt_regs __iomem *bt = par->bt;
+
+ sbus_writel(0x04 << 24, &bt->addr); /* color planes */
+ sbus_writel(0xff << 24, &bt->control);
+ sbus_writel(0x05 << 24, &bt->addr);
+ sbus_writel(0x00 << 24, &bt->control);
+ sbus_writel(0x06 << 24, &bt->addr); /* overlay plane */
+ sbus_writel(0x73 << 24, &bt->control);
+ sbus_writel(0x07 << 24, &bt->addr);
+ sbus_writel(0x00 << 24, &bt->control);
+}
+
+static void cg6_chip_init(struct fb_info *info)
+{
+ struct cg6_par *par = (struct cg6_par *)info->par;
+ struct cg6_tec __iomem *tec = par->tec;
+ struct cg6_fbc __iomem *fbc = par->fbc;
+ struct cg6_thc __iomem *thc = par->thc;
+ u32 rev, conf, mode;
+ int i;
+
+ /* Hide the cursor. */
+ sbus_writel(CG6_THC_CURSOFF, &thc->thc_cursxy);
+
+ /* Turn off stuff in the Transform Engine. */
+ sbus_writel(0, &tec->tec_matrix);
+ sbus_writel(0, &tec->tec_clip);
+ sbus_writel(0, &tec->tec_vdc);
+
+ /* Take care of bugs in old revisions. */
+ rev = (sbus_readl(par->fhc) >> CG6_FHC_REV_SHIFT) & CG6_FHC_REV_MASK;
+ if (rev < 5) {
+ conf = (sbus_readl(par->fhc) & CG6_FHC_RES_MASK) |
+ CG6_FHC_CPU_68020 | CG6_FHC_TEST |
+ (11 << CG6_FHC_TEST_X_SHIFT) |
+ (11 << CG6_FHC_TEST_Y_SHIFT);
+ if (rev < 2)
+ conf |= CG6_FHC_DST_DISABLE;
+ sbus_writel(conf, par->fhc);
+ }
+
+ /* Set things in the FBC. Bad things appear to happen if we do
+ * back to back store/loads on the mode register, so copy it
+ * out instead. */
+ mode = sbus_readl(&fbc->mode);
+ do {
+ i = sbus_readl(&fbc->s);
+ } while (i & 0x10000000);
+ mode &= ~(CG6_FBC_BLIT_MASK | CG6_FBC_MODE_MASK |
+ CG6_FBC_DRAW_MASK | CG6_FBC_BWRITE0_MASK |
+ CG6_FBC_BWRITE1_MASK | CG6_FBC_BREAD_MASK |
+ CG6_FBC_BDISP_MASK);
+ mode |= (CG6_FBC_BLIT_SRC | CG6_FBC_MODE_COLOR8 |
+ CG6_FBC_DRAW_RENDER | CG6_FBC_BWRITE0_ENABLE |
+ CG6_FBC_BWRITE1_DISABLE | CG6_FBC_BREAD_0 |
+ CG6_FBC_BDISP_0);
+ sbus_writel(mode, &fbc->mode);
+
+ sbus_writel(0, &fbc->clip);
+ sbus_writel(0, &fbc->offx);
+ sbus_writel(0, &fbc->offy);
+ sbus_writel(0, &fbc->clipminx);
+ sbus_writel(0, &fbc->clipminy);
+ sbus_writel(info->var.xres - 1, &fbc->clipmaxx);
+ sbus_writel(info->var.yres - 1, &fbc->clipmaxy);
+}
+
+static void cg6_unmap_regs(struct platform_device *op, struct fb_info *info,
+ struct cg6_par *par)
+{
+ if (par->fbc)
+ of_iounmap(&op->resource[0], par->fbc, 4096);
+ if (par->tec)
+ of_iounmap(&op->resource[0], par->tec, sizeof(struct cg6_tec));
+ if (par->thc)
+ of_iounmap(&op->resource[0], par->thc, sizeof(struct cg6_thc));
+ if (par->bt)
+ of_iounmap(&op->resource[0], par->bt, sizeof(struct bt_regs));
+ if (par->fhc)
+ of_iounmap(&op->resource[0], par->fhc, sizeof(u32));
+
+ if (info->screen_base)
+ of_iounmap(&op->resource[0], info->screen_base,
+ info->fix.smem_len);
+}
+
+static int cg6_probe(struct platform_device *op)
+{
+ struct device_node *dp = op->dev.of_node;
+ struct fb_info *info;
+ struct cg6_par *par;
+ int linebytes, err;
+ int dblbuf;
+
+ info = framebuffer_alloc(sizeof(struct cg6_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, 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);
+
+ dblbuf = of_getintprop_default(dp, "dblbuf", 0);
+ if (dblbuf)
+ info->fix.smem_len *= 4;
+
+ par->fbc = of_ioremap(&op->resource[0], CG6_FBC_OFFSET,
+ 4096, "cgsix fbc");
+ par->tec = of_ioremap(&op->resource[0], CG6_TEC_OFFSET,
+ sizeof(struct cg6_tec), "cgsix tec");
+ par->thc = of_ioremap(&op->resource[0], CG6_THC_OFFSET,
+ sizeof(struct cg6_thc), "cgsix thc");
+ par->bt = of_ioremap(&op->resource[0], CG6_BROOKTREE_OFFSET,
+ sizeof(struct bt_regs), "cgsix dac");
+ par->fhc = of_ioremap(&op->resource[0], CG6_FHC_OFFSET,
+ sizeof(u32), "cgsix fhc");
+
+ info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_IMAGEBLIT |
+ FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT |
+ FBINFO_READS_FAST;
+ info->fbops = &cg6_ops;
+
+ info->screen_base = of_ioremap(&op->resource[0], CG6_RAM_OFFSET,
+ info->fix.smem_len, "cgsix ram");
+ if (!par->fbc || !par->tec || !par->thc ||
+ !par->bt || !par->fhc || !info->screen_base)
+ goto out_unmap_regs;
+
+ info->var.accel_flags = FB_ACCELF_TEXT;
+
+ cg6_bt_init(par);
+ cg6_chip_init(info);
+ cg6_blank(FB_BLANK_UNBLANK, info);
+
+ if (fb_alloc_cmap(&info->cmap, 256, 0))
+ goto out_unmap_regs;
+
+ fb_set_cmap(&info->cmap, info);
+ cg6_init_fix(info, linebytes);
+
+ err = register_framebuffer(info);
+ if (err < 0)
+ goto out_dealloc_cmap;
+
+ dev_set_drvdata(&op->dev, info);
+
+ printk(KERN_INFO "%pOF: CGsix [%s] at %lx:%lx\n",
+ dp, info->fix.id,
+ par->which_io, info->fix.smem_start);
+
+ return 0;
+
+out_dealloc_cmap:
+ fb_dealloc_cmap(&info->cmap);
+
+out_unmap_regs:
+ cg6_unmap_regs(op, info, par);
+ framebuffer_release(info);
+
+out_err:
+ return err;
+}
+
+static int cg6_remove(struct platform_device *op)
+{
+ struct fb_info *info = dev_get_drvdata(&op->dev);
+ struct cg6_par *par = info->par;
+
+ unregister_framebuffer(info);
+ fb_dealloc_cmap(&info->cmap);
+
+ cg6_unmap_regs(op, info, par);
+
+ framebuffer_release(info);
+
+ return 0;
+}
+
+static const struct of_device_id cg6_match[] = {
+ {
+ .name = "cgsix",
+ },
+ {
+ .name = "cgthree+",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, cg6_match);
+
+static struct platform_driver cg6_driver = {
+ .driver = {
+ .name = "cg6",
+ .of_match_table = cg6_match,
+ },
+ .probe = cg6_probe,
+ .remove = cg6_remove,
+};
+
+static int __init cg6_init(void)
+{
+ if (fb_get_options("cg6fb", NULL))
+ return -ENODEV;
+
+ return platform_driver_register(&cg6_driver);
+}
+
+static void __exit cg6_exit(void)
+{
+ platform_driver_unregister(&cg6_driver);
+}
+
+module_init(cg6_init);
+module_exit(cg6_exit);
+
+MODULE_DESCRIPTION("framebuffer driver for CGsix chipsets");
+MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
+MODULE_VERSION("2.0");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 18:42:33 +0000