patch-2.1.16 linux/drivers/sbus/char/tcx.c

• Lines: 366
• Date: Fri Dec 13 11:37:37 1996
• Orig file: v2.1.15/linux/drivers/sbus/char/tcx.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v2.1.15/linux/drivers/sbus/char/tcx.c linux/drivers/sbus/char/tcx.c
@@ -0,0 +1,365 @@
+/* $Id: tcx.c,v 1.8 1996/11/21 16:57:57 jj Exp $
+ * tcx.c: SUNW,tcx 24/8bit frame buffer driver
+ *
+ * Copyright (C) 1996 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
+ * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
+ */
+
+#include <linux/kd.h>
+#include <linux/tty.h>
+#include <linux/malloc.h>
+
+#include <asm/sbus.h>
+#include <asm/io.h>
+#include <asm/fbio.h>
+#include <asm/pgtable.h>
+
+#include "../../char/vt_kern.h"
+#include "../../char/selection.h"
+#include "../../char/console_struct.h"
+#include "fb.h"
+#include "cg_common.h"
+
+/* Offset of interesting structures in the tcx registers */
+#define TCX_RAM8BIT_OFFSET	0
+#define TCX_CONTROLPLANE_OFFSET 4
+#define TCX_BROOKTREE_OFFSET 	8
+#define TCX_THC_OFFSET		9
+#define TCX_TEC_OFFSET		7
+
+/* THC definitions */
+#define TCX_THC_MISC_REV_SHIFT       16
+#define TCX_THC_MISC_REV_MASK        15
+#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 {
+	volatile int tec_matrix;
+	volatile int tec_clip;
+	volatile int tec_vdc;
+};
+
+struct tcx_thc {
+	volatile uint thc_rev;
+        uint thc_pad0[511];
+	volatile uint thc_hs;		/* hsync timing */
+	volatile uint thc_hsdvs;
+	volatile uint thc_hd;
+	volatile uint thc_vs;		/* vsync timing */
+	volatile uint thc_vd;
+	volatile uint thc_refresh;
+	volatile uint thc_misc;
+	uint thc_pad1[56];
+	volatile uint thc_cursxy;	/* cursor x,y position (16 bits each) */
+	volatile uint thc_cursmask[32];	/* cursor mask bits */
+	volatile uint thc_cursbits[32];	/* what to show where mask enabled */
+};
+
+static void
+tcx_restore_palette (fbinfo_t *fbinfo)
+{
+	volatile struct bt_regs *bt;
+
+	bt = fbinfo->info.tcx.bt;
+	bt->addr = 0;
+	bt->color_map = 0xffffffff;
+	bt->color_map = 0xffffffff;
+	bt->color_map = 0xffffffff;
+}
+
+static void
+tcx_set_control_plane (fbinfo_t *fb)
+{
+	register uint *p, *pend;
+	
+	p = fb->info.tcx.tcx_cplane;
+	if (!p) return;
+	for (pend = p + (fb->info.tcx.tcx_sizes [TCX_CONTROLPLANE_OFFSET] >> 2); p < pend; p++)
+		*p &= 0xffffff;
+}
+
+static void
+tcx_switch_from_graph (void)
+{
+	fbinfo_t *fb = &(fbinfo [0]);
+
+	/* Reset control plane to 8bit mode if necessary */
+	if (fb->open && fb->mmaped)
+		tcx_set_control_plane (fb);
+}
+
+/* Ugh: X wants to mmap a bunch of cute stuff at the same time :-( */
+/* So, we just mmap the things that are being asked for */
+static int
+tcx_mmap (struct inode *inode, struct file *file, struct vm_area_struct *vma,
+	  long base, fbinfo_t *fb)
+{
+	uint size, page, r, map_size;
+	uint map_offset = 0, i;
+	long offsets[13] = { -1, TCX_RAM24BIT, TCX_UNK3, TCX_UNK4,
+			     -1, TCX_UNK6, TCX_UNK7,
+			     -1, -1, -1, TCX_UNK2, TCX_DHC, TCX_ALT };
+			     
+	size = vma->vm_end - vma->vm_start;
+        if (vma->vm_offset & ~PAGE_MASK)
+                return -ENXIO;
+
+	/* To stop the swapper from even considering these pages */
+	vma->vm_flags |= FB_MMAP_VM_FLAGS;
+	
+	/* Each page, see which map applies */
+	for (page = 0; page < size; ){
+		switch (vma->vm_offset+page){
+		case TCX_RAM8BIT:
+			map_size = fb->type.fb_size;
+			map_offset = get_phys ((uint) fb->base);
+			break;
+		case TCX_TEC:
+			map_size = PAGE_SIZE;
+			map_offset = get_phys ((uint)fb->info.tcx.tec);
+			break;
+		case TCX_BTREGS:
+			map_size = PAGE_SIZE;
+			map_offset = get_phys ((uint)fb->info.tcx.bt);
+			break;
+		case TCX_THC:
+			map_size = PAGE_SIZE;
+			map_offset = get_phys ((uint)fb->info.tcx.thc);
+			break;
+		case TCX_CONTROLPLANE:
+			if (fb->info.tcx.tcx_cplane) {
+				map_size = fb->info.tcx.tcx_sizes [TCX_CONTROLPLANE_OFFSET];
+				map_offset = get_phys ((uint)fb->info.tcx.tcx_cplane);
+			} else
+				map_size = 0;
+			break;
+		default:
+			map_size = 0;
+			for (i = 0; i < 13; i++)
+				if (offsets [i] == vma->vm_offset+page) {
+					if ((map_size = fb->info.tcx.tcx_sizes [i]))
+						map_offset = fb->info.tcx.tcx_offsets [i];
+					break;
+				}
+			break;
+		}
+		if (!map_size){
+			page += PAGE_SIZE;
+			continue;
+		}
+		if (page + map_size > size)
+			map_size = size - page;
+		r = io_remap_page_range (vma->vm_start+page,
+					 map_offset,
+					 map_size, vma->vm_page_prot,
+					 fb->space);
+		if (r) return -EAGAIN;
+		page += map_size;
+	}
+        vma->vm_inode = inode;
+        inode->i_count++;
+        return 0;
+}
+
+static void
+tcx_loadcmap (fbinfo_t *fb, int index, int count)
+{
+	struct bt_regs *bt = fb->info.tcx.bt;
+	int i;
+	
+	bt->addr = index << 24;
+	for (i = index; count--; i++){
+		bt->color_map = fb->color_map CM(i,0) << 24;
+		bt->color_map = fb->color_map CM(i,1) << 24;
+		bt->color_map = fb->color_map CM(i,2) << 24;
+	}
+	bt->addr = 0;
+}
+
+static void
+tcx_setcursormap (fbinfo_t *fb, unsigned char *red,
+				 unsigned char *green,
+				 unsigned char *blue)
+{
+	struct bt_regs *bt = fb->info.tcx.bt;
+
+	/* Note the 2 << 24 is different from cg6's 1 << 24 */
+	bt->addr = 2 << 24;
+	bt->cursor = red[0] << 24;
+	bt->cursor = green[0] << 24;
+	bt->cursor = blue[0] << 24;
+	bt->addr = 3 << 24;
+	bt->cursor = red[1] << 24;
+	bt->cursor = green[1] << 24;
+	bt->cursor = blue[1] << 24;
+	bt->addr = 0;
+}
+
+/* Load cursor information */
+static void
+tcx_setcursor (fbinfo_t *fb)
+{
+	uint v;
+	struct cg_cursor *c = &fb->cursor;
+
+	if (c->enable){
+		v = ((c->cpos.fbx - c->chot.fbx) << 16)
+		   |((c->cpos.fby - c->chot.fby) & 0xffff);
+	} else {
+		/* Magic constant to turn off the cursor */
+		v = ((65536-32) << 16) | (65536-32);
+	}
+	fb->info.tcx.thc->thc_cursxy = v;
+}
+
+/* Set cursor shape */
+static void
+tcx_setcurshape (fbinfo_t *fb)
+{
+	struct tcx_thc *thc = fb->info.tcx.thc;
+	int i;
+	
+	for (i = 0; i < 32; i++){
+		thc->thc_cursmask [i] = fb->cursor.bits[0][i];
+		thc->thc_cursbits [i] = fb->cursor.bits[1][i];
+	}
+}
+
+static void
+tcx_blank (fbinfo_t *fb)
+{
+	fb->info.tcx.thc->thc_misc &= ~TCX_THC_MISC_VIDEO;
+}
+
+static void
+tcx_unblank (fbinfo_t *fb)
+{
+	fb->info.tcx.thc->thc_misc |= TCX_THC_MISC_VIDEO;
+}
+
+void
+tcx_reset (fbinfo_t *fb)
+{
+	struct tcx_info *tcx = &(fb->info.tcx);
+
+	if (fb->setcursor)
+		sun_hw_hide_cursor ();
+	/* Reset control plane to 8bit mode if necessary */
+	if (fb->open && fb->mmaped)
+		tcx_set_control_plane (fb);
+
+	/* Turn off stuff in the Transform Engine. */
+	tcx->tec->tec_matrix = 0;
+	tcx->tec->tec_clip = 0;
+	tcx->tec->tec_vdc = 0;
+
+	/* Enable cursor in Brooktree DAC. */
+	tcx->bt->addr = 0x06 << 24;
+	tcx->bt->control |= 0x03 << 24;
+}
+
+__initfunc(void tcx_setup (fbinfo_t *fb, int slot, int node, uint tcx, struct linux_sbus_device *sbdp))
+{
+	struct tcx_info *tcxinfo;
+	int i;
+
+	printk ("tcx%d at 0x%8.8x ", slot, (uint) tcx);
+	
+	/* Fill in parameters we left out */
+	fb->type.fb_cmsize = 256;
+	fb->mmap = tcx_mmap;
+	fb->loadcmap = tcx_loadcmap;
+	fb->reset = tcx_reset;
+	fb->blank = tcx_blank;
+	fb->unblank = tcx_unblank;
+	fb->emulations [1] = FBTYPE_SUN3COLOR;
+	fb->emulations [2] = FBTYPE_MEMCOLOR;
+	fb->switch_from_graph = tcx_switch_from_graph;
+	fb->postsetup = sun_cg_postsetup;
+	
+	tcxinfo = (struct tcx_info *) &fb->info.tcx;
+	
+	memset (tcxinfo, 0, sizeof(struct tcx_info));
+	
+	for (i = 0; i < 13; i++)
+		tcxinfo->tcx_offsets [i] = (long)(sbdp->reg_addrs [i].phys_addr);
+		
+	/* Map the hardware registers */
+	tcxinfo->bt = sparc_alloc_io ((void *) tcxinfo->tcx_offsets [TCX_BROOKTREE_OFFSET], 0,
+		 sizeof (struct bt_regs),"tcx_dac", fb->space, 0);
+	tcxinfo->thc = sparc_alloc_io ((void *) tcxinfo->tcx_offsets [TCX_THC_OFFSET], 0,
+		 sizeof (struct tcx_thc), "tcx_thc", fb->space, 0);
+	tcxinfo->tec = sparc_alloc_io ((void *) tcxinfo->tcx_offsets [TCX_TEC_OFFSET], 0,
+		 sizeof (struct tcx_tec), "tcx_tec", fb->space, 0);
+	if (!fb->base){
+		fb->base = (uint) sparc_alloc_io ((void *) tcxinfo->tcx_offsets [TCX_RAM8BIT_OFFSET], 0,
+                    fb->type.fb_size, "tcx_ram", fb->space, 0);
+	}
+	
+	if (prom_getbool (node, "hw-cursor")) {
+		fb->setcursor = tcx_setcursor;
+		fb->setcursormap = tcx_setcursormap;
+		fb->setcurshape = tcx_setcurshape;
+	}
+		
+	if (!slot) {
+		fb_restore_palette = tcx_restore_palette;
+	}
+	
+	i = fb->type.fb_size;
+	tcxinfo->tcx_sizes[2] = i << 3;
+	tcxinfo->tcx_sizes[3] = i << 3;
+	tcxinfo->tcx_sizes[10] = 0x20000;
+	tcxinfo->tcx_sizes[11] = PAGE_SIZE;
+	tcxinfo->tcx_sizes[12] = PAGE_SIZE;
+	
+	if (prom_getbool (node, "tcx-8-bit"))
+		tcxinfo->lowdepth = 1;
+		
+	if (!tcxinfo->lowdepth) {
+		tcxinfo->tcx_sizes[1] = i << 2;
+		tcxinfo->tcx_sizes[4] = i << 2;
+		tcxinfo->tcx_sizes[5] = i << 3;
+		tcxinfo->tcx_sizes[6] = i << 3;
+		fb->type.fb_depth = 24;
+		tcxinfo->tcx_cplane = sparc_alloc_io ((void *) tcxinfo->tcx_offsets [TCX_CONTROLPLANE_OFFSET], 0,
+		 	tcxinfo->tcx_sizes [TCX_CONTROLPLANE_OFFSET], "tcx_cplane", fb->space, 0);
+	}
+	
+	/* Initialize Brooktree DAC */
+	tcxinfo->bt->addr = 0x04 << 24;		/* color planes */
+	tcxinfo->bt->control = 0xff << 24;
+	tcxinfo->bt->addr = 0x05 << 24;
+	tcxinfo->bt->control = 0x00 << 24;
+	tcxinfo->bt->addr = 0x06 << 24;		/* overlay plane */
+	tcxinfo->bt->control = 0x73 << 24;
+	tcxinfo->bt->addr = 0x07 << 24;
+	tcxinfo->bt->control = 0x00 << 24;
+
+	printk("Rev %d.%d %s\n",
+		(tcxinfo->thc->thc_rev >> TCX_THC_REV_REV_SHIFT) & TCX_THC_REV_REV_MASK,
+		(tcxinfo->thc->thc_rev >> TCX_THC_REV_MINREV_SHIFT) & TCX_THC_REV_MINREV_MASK,
+		tcxinfo->lowdepth ? "8-bit only" : "24-bit depth");
+	
+	/* Reset the tcx */
+	tcx_reset(fb);
+
+	if (!slot)	
+	/* Enable Video */
+		tcx_unblank (fb);
+	else
+		tcx_blank (fb);
+}