tcxfb.c
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- /* $Id: tcxfb.c,v 1.13 2001/09/19 00:04:33 davem Exp $
- * tcxfb.c: TCX 24/8bit frame buffer driver
- *
- * 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)
- */
- #include <linux/module.h>
- #include <linux/sched.h>
- #include <linux/kernel.h>
- #include <linux/errno.h>
- #include <linux/string.h>
- #include <linux/mm.h>
- #include <linux/tty.h>
- #include <linux/slab.h>
- #include <linux/vmalloc.h>
- #include <linux/delay.h>
- #include <linux/interrupt.h>
- #include <linux/fb.h>
- #include <linux/init.h>
- #include <linux/selection.h>
- #include <video/sbusfb.h>
- #include <asm/io.h>
- #include <asm/sbus.h>
- #include <video/fbcon-cfb8.h>
- /* THC definitions */
- #define TCX_THC_MISC_REV_SHIFT 16
- #define TCX_THC_MISC_REV_MASK 15
- #define TCX_THC_MISC_VSYNC_DIS (1 << 25)
- #define TCX_THC_MISC_HSYNC_DIS (1 << 24)
- #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 u32 tec_matrix;
- volatile u32 tec_clip;
- volatile u32 tec_vdc;
- };
- struct tcx_thc {
- volatile u32 thc_rev;
- u32 thc_pad0[511];
- volatile u32 thc_hs; /* hsync timing */
- volatile u32 thc_hsdvs;
- volatile u32 thc_hd;
- volatile u32 thc_vs; /* vsync timing */
- volatile u32 thc_vd;
- volatile u32 thc_refresh;
- volatile u32 thc_misc;
- u32 thc_pad1[56];
- volatile u32 thc_cursxy; /* cursor x,y position (16 bits each) */
- volatile u32 thc_cursmask[32]; /* cursor mask bits */
- volatile u32 thc_cursbits[32]; /* what to show where mask enabled */
- };
- static struct sbus_mmap_map tcx_mmap_map[] = {
- { TCX_RAM8BIT, 0, SBUS_MMAP_FBSIZE(1) },
- { TCX_RAM24BIT, 0, SBUS_MMAP_FBSIZE(4) },
- { TCX_UNK3, 0, SBUS_MMAP_FBSIZE(8) },
- { TCX_UNK4, 0, SBUS_MMAP_FBSIZE(8) },
- { TCX_CONTROLPLANE, 0, SBUS_MMAP_FBSIZE(4) },
- { TCX_UNK6, 0, SBUS_MMAP_FBSIZE(8) },
- { TCX_UNK7, 0, SBUS_MMAP_FBSIZE(8) },
- { TCX_TEC, 0, PAGE_SIZE },
- { TCX_BTREGS, 0, PAGE_SIZE },
- { TCX_THC, 0, PAGE_SIZE },
- { TCX_DHC, 0, PAGE_SIZE },
- { TCX_ALT, 0, PAGE_SIZE },
- { TCX_UNK2, 0, 0x20000 },
- { 0, 0, 0 }
- };
- static void __tcx_set_control_plane (struct fb_info_sbusfb *fb)
- {
- u32 *p, *pend;
-
- p = fb->s.tcx.cplane;
- if (p == NULL)
- return;
- for (pend = p + fb->type.fb_size; p < pend; p++) {
- u32 tmp = sbus_readl(p);
- tmp &= 0xffffff;
- sbus_writel(tmp, p);
- }
- }
-
- static void tcx_switch_from_graph (struct fb_info_sbusfb *fb)
- {
- unsigned long flags;
- spin_lock_irqsave(&fb->lock, flags);
- /* Reset control plane to 8bit mode if necessary */
- if (fb->open && fb->mmaped)
- __tcx_set_control_plane (fb);
- spin_unlock_irqrestore(&fb->lock, flags);
- }
- static void tcx_loadcmap (struct fb_info_sbusfb *fb, struct display *p, int index, int count)
- {
- struct bt_regs *bt = fb->s.tcx.bt;
- unsigned long flags;
- int i;
-
- spin_lock_irqsave(&fb->lock, flags);
- sbus_writel(index << 24, &bt->addr);
- for (i = index; count--; i++){
- sbus_writel(fb->color_map CM(i,0) << 24, &bt->color_map);
- sbus_writel(fb->color_map CM(i,1) << 24, &bt->color_map);
- sbus_writel(fb->color_map CM(i,2) << 24, &bt->color_map);
- }
- sbus_writel(0, &bt->addr);
- spin_unlock_irqrestore(&fb->lock, flags);
- }
- static void tcx_restore_palette (struct fb_info_sbusfb *fb)
- {
- struct bt_regs *bt = fb->s.tcx.bt;
- unsigned long flags;
-
- spin_lock_irqsave(&fb->lock, flags);
- sbus_writel(0, &bt->addr);
- sbus_writel(0xffffffff, &bt->color_map);
- sbus_writel(0xffffffff, &bt->color_map);
- sbus_writel(0xffffffff, &bt->color_map);
- spin_unlock_irqrestore(&fb->lock, flags);
- }
- static void tcx_setcursormap (struct fb_info_sbusfb *fb, u8 *red, u8 *green, u8 *blue)
- {
- struct bt_regs *bt = fb->s.tcx.bt;
- unsigned long flags;
- spin_lock_irqsave(&fb->lock, flags);
- /* Note the 2 << 24 is different from cg6's 1 << 24 */
- sbus_writel(2 << 24, &bt->addr);
- sbus_writel(red[0] << 24, &bt->cursor);
- sbus_writel(green[0] << 24, &bt->cursor);
- sbus_writel(blue[0] << 24, &bt->cursor);
- sbus_writel(3 << 24, &bt->addr);
- sbus_writel(red[1] << 24, &bt->cursor);
- sbus_writel(green[1] << 24, &bt->cursor);
- sbus_writel(blue[1] << 24, &bt->cursor);
- sbus_writel(0, &bt->addr);
- spin_unlock_irqrestore(&fb->lock, flags);
- }
- /* Set cursor shape */
- static void tcx_setcurshape (struct fb_info_sbusfb *fb)
- {
- struct tcx_thc *thc = fb->s.tcx.thc;
- unsigned long flags;
- int i;
- spin_lock_irqsave(&fb->lock, flags);
- for (i = 0; i < 32; i++){
- sbus_writel(fb->cursor.bits[0][i], &thc->thc_cursmask[i]);
- sbus_writel(fb->cursor.bits[1][i], &thc->thc_cursbits[i]);
- }
- spin_unlock_irqrestore(&fb->lock, flags);
- }
- /* Load cursor information */
- static void tcx_setcursor (struct fb_info_sbusfb *fb)
- {
- struct cg_cursor *c = &fb->cursor;
- unsigned long flags;
- unsigned int v;
- spin_lock_irqsave(&fb->lock, flags);
- 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);
- sbus_writel(v, &fb->s.tcx.thc->thc_cursxy);
- spin_unlock_irqrestore(&fb->lock, flags);
- }
- static void tcx_blank (struct fb_info_sbusfb *fb)
- {
- unsigned long flags;
- u32 tmp;
- spin_lock_irqsave(&fb->lock, flags);
- tmp = sbus_readl(&fb->s.tcx.thc->thc_misc);
- tmp &= ~TCX_THC_MISC_VIDEO;
- /* This should put us in power-save */
- tmp |= TCX_THC_MISC_VSYNC_DIS;
- tmp |= TCX_THC_MISC_HSYNC_DIS;
- sbus_writel(tmp, &fb->s.tcx.thc->thc_misc);
- spin_unlock_irqrestore(&fb->lock, flags);
- }
- static void tcx_unblank (struct fb_info_sbusfb *fb)
- {
- unsigned long flags;
- u32 tmp;
- spin_lock_irqsave(&fb->lock, flags);
- tmp = sbus_readl(&fb->s.tcx.thc->thc_misc);
- tmp &= ~TCX_THC_MISC_VSYNC_DIS;
- tmp &= ~TCX_THC_MISC_HSYNC_DIS;
- tmp |= TCX_THC_MISC_VIDEO;
- sbus_writel(tmp, &fb->s.tcx.thc->thc_misc);
- spin_unlock_irqrestore(&fb->lock, flags);
- }
- static void tcx_reset (struct fb_info_sbusfb *fb)
- {
- unsigned long flags;
- u32 tmp;
- spin_lock_irqsave(&fb->lock, flags);
- if (fb->open && fb->mmaped)
- __tcx_set_control_plane(fb);
-
- /* Turn off stuff in the Transform Engine. */
- sbus_writel(0, &fb->s.tcx.tec->tec_matrix);
- sbus_writel(0, &fb->s.tcx.tec->tec_clip);
- sbus_writel(0, &fb->s.tcx.tec->tec_vdc);
- /* Enable cursor in Brooktree DAC. */
- sbus_writel(0x06 << 24, &fb->s.tcx.bt->addr);
- tmp = sbus_readl(&fb->s.tcx.bt->control);
- tmp |= 0x03 << 24;
- sbus_writel(tmp, &fb->s.tcx.bt->control);
- spin_unlock_irqrestore(&fb->lock, flags);
- }
- static void tcx_margins (struct fb_info_sbusfb *fb, struct display *p, int x_margin, int y_margin)
- {
- p->screen_base += (y_margin - fb->y_margin) * p->line_length + (x_margin - fb->x_margin);
- }
- static char idstring[60] __initdata = { 0 };
- char __init *tcxfb_init(struct fb_info_sbusfb *fb)
- {
- struct fb_fix_screeninfo *fix = &fb->fix;
- struct display *disp = &fb->disp;
- struct fbtype *type = &fb->type;
- struct sbus_dev *sdev = fb->sbdp;
- unsigned long phys = sdev->reg_addrs[0].phys_addr;
- int lowdepth, i, j;
- #ifndef FBCON_HAS_CFB8
- return NULL;
- #endif
- lowdepth = prom_getbool (fb->prom_node, "tcx-8-bit");
- if (lowdepth) {
- strcpy(fb->info.modename, "TCX8");
- strcpy(fix->id, "TCX8");
- } else {
- strcpy(fb->info.modename, "TCX24");
- strcpy(fix->id, "TCX24");
- }
- fix->line_length = fb->var.xres_virtual;
- fix->accel = FB_ACCEL_SUN_TCX;
- disp->scrollmode = SCROLL_YREDRAW;
- if (!disp->screen_base) {
- disp->screen_base = (char *)
- sbus_ioremap(&sdev->resource[0], 0,
- type->fb_size, "tcx ram");
- }
- disp->screen_base += fix->line_length * fb->y_margin + fb->x_margin;
- fb->s.tcx.tec = (struct tcx_tec *)
- sbus_ioremap(&sdev->resource[7], 0,
- sizeof(struct tcx_tec), "tcx tec");
- fb->s.tcx.thc = (struct tcx_thc *)
- sbus_ioremap(&sdev->resource[9], 0,
- sizeof(struct tcx_thc), "tcx thc");
- fb->s.tcx.bt = (struct bt_regs *)
- sbus_ioremap(&sdev->resource[8], 0,
- sizeof(struct bt_regs), "tcx dac");
- if (!lowdepth) {
- fb->s.tcx.cplane = (u32 *)
- sbus_ioremap(&sdev->resource[4], 0,
- type->fb_size * sizeof(u32), "tcx cplane");
- type->fb_depth = 24;
- fb->switch_from_graph = tcx_switch_from_graph;
- } else {
- /* As there can be one tcx in a machine only, we can write directly into
- tcx_mmap_map */
- tcx_mmap_map[1].size = SBUS_MMAP_EMPTY;
- tcx_mmap_map[4].size = SBUS_MMAP_EMPTY;
- tcx_mmap_map[5].size = SBUS_MMAP_EMPTY;
- tcx_mmap_map[6].size = SBUS_MMAP_EMPTY;
- }
- fb->dispsw = fbcon_cfb8;
- fb->margins = tcx_margins;
- fb->loadcmap = tcx_loadcmap;
- if (prom_getbool (fb->prom_node, "hw-cursor")) {
- fb->setcursor = tcx_setcursor;
- fb->setcursormap = tcx_setcursormap;
- fb->setcurshape = tcx_setcurshape;
- }
- fb->restore_palette = tcx_restore_palette;
- fb->blank = tcx_blank;
- fb->unblank = tcx_unblank;
- fb->reset = tcx_reset;
- fb->physbase = 0;
- for (i = 0; i < 13; i++) {
- /* tcx_mmap_map has to be sorted by voff, while
- order of phys registers from PROM differs a little
- bit. Here is the correction */
- switch (i) {
- case 10: j = 12; break;
- case 11:
- case 12: j = i - 1; break;
- default: j = i; break;
- }
- tcx_mmap_map[i].poff = fb->sbdp->reg_addrs[j].phys_addr;
- }
- fb->mmap_map = tcx_mmap_map;
- /* Initialize Brooktree DAC */
- sbus_writel(0x04 << 24, &fb->s.tcx.bt->addr); /* color planes */
- sbus_writel(0xff << 24, &fb->s.tcx.bt->control);
- sbus_writel(0x05 << 24, &fb->s.tcx.bt->addr);
- sbus_writel(0x00 << 24, &fb->s.tcx.bt->control);
- sbus_writel(0x06 << 24, &fb->s.tcx.bt->addr); /* overlay plane */
- sbus_writel(0x73 << 24, &fb->s.tcx.bt->control);
- sbus_writel(0x07 << 24, &fb->s.tcx.bt->addr);
- sbus_writel(0x00 << 24, &fb->s.tcx.bt->control);
- sprintf(idstring, "tcx at %x.%08lx Rev %d.%d %s",
- fb->iospace, phys,
- ((sbus_readl(&fb->s.tcx.thc->thc_rev) >> TCX_THC_REV_REV_SHIFT) &
- TCX_THC_REV_REV_MASK),
- ((sbus_readl(&fb->s.tcx.thc->thc_rev) >> TCX_THC_REV_MINREV_SHIFT) &
- TCX_THC_REV_MINREV_MASK),
- lowdepth ? "8-bit only" : "24-bit depth");
-
- tcx_reset(fb);
- return idstring;
- }
- MODULE_LICENSE("GPL");