aboutsummaryrefslogtreecommitdiff
path: root/drivers/video/bw2.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/video/bw2.c')
-rw-r--r--drivers/video/bw2.c428
1 files changed, 428 insertions, 0 deletions
diff --git a/drivers/video/bw2.c b/drivers/video/bw2.c
new file mode 100644
index 00000000000..3d20b2d47d4
--- /dev/null
+++ b/drivers/video/bw2.c
@@ -0,0 +1,428 @@
+/* bw2.c: BWTWO frame buffer driver
+ *
+ * Copyright (C) 2003 David S. Miller (davem@redhat.com)
+ * Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz)
+ * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
+ * Copyright (C) 1997 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/slab.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/fb.h>
+#include <linux/mm.h>
+
+#include <asm/io.h>
+#include <asm/sbus.h>
+#include <asm/oplib.h>
+#include <asm/fbio.h>
+
+#ifdef CONFIG_SPARC32
+#include <asm/sun4paddr.h>
+#endif
+
+#include "sbuslib.h"
+
+/*
+ * Local functions.
+ */
+
+static int bw2_blank(int, struct fb_info *);
+
+static int bw2_mmap(struct fb_info *, struct file *, struct vm_area_struct *);
+static int bw2_ioctl(struct inode *, struct file *, unsigned int,
+ unsigned long, struct fb_info *);
+
+/*
+ * Frame buffer operations
+ */
+
+static struct fb_ops bw2_ops = {
+ .owner = THIS_MODULE,
+ .fb_blank = bw2_blank,
+ .fb_fillrect = cfb_fillrect,
+ .fb_copyarea = cfb_copyarea,
+ .fb_imageblit = cfb_imageblit,
+ .fb_mmap = bw2_mmap,
+ .fb_ioctl = bw2_ioctl,
+ .fb_cursor = soft_cursor,
+};
+
+/* OBio addresses for the bwtwo registers */
+#define BWTWO_REGISTER_OFFSET 0x400000
+
+struct bt_regs {
+ volatile u32 addr;
+ volatile u32 color_map;
+ volatile u32 control;
+ volatile u32 cursor;
+};
+
+struct bw2_regs {
+ struct bt_regs cmap;
+ volatile u8 control;
+ volatile u8 status;
+ volatile u8 cursor_start;
+ volatile u8 cursor_end;
+ volatile u8 h_blank_start;
+ volatile u8 h_blank_end;
+ volatile u8 h_sync_start;
+ volatile u8 h_sync_end;
+ volatile u8 comp_sync_end;
+ volatile u8 v_blank_start_high;
+ volatile u8 v_blank_start_low;
+ volatile u8 v_blank_end;
+ volatile u8 v_sync_start;
+ volatile u8 v_sync_end;
+ volatile u8 xfer_holdoff_start;
+ volatile u8 xfer_holdoff_end;
+};
+
+/* Status Register Constants */
+#define BWTWO_SR_RES_MASK 0x70
+#define BWTWO_SR_1600_1280 0x50
+#define BWTWO_SR_1152_900_76_A 0x40
+#define BWTWO_SR_1152_900_76_B 0x60
+#define BWTWO_SR_ID_MASK 0x0f
+#define BWTWO_SR_ID_MONO 0x02
+#define BWTWO_SR_ID_MONO_ECL 0x03
+#define BWTWO_SR_ID_MSYNC 0x04
+#define BWTWO_SR_ID_NOCONN 0x0a
+
+/* Control Register Constants */
+#define BWTWO_CTL_ENABLE_INTS 0x80
+#define BWTWO_CTL_ENABLE_VIDEO 0x40
+#define BWTWO_CTL_ENABLE_TIMING 0x20
+#define BWTWO_CTL_ENABLE_CURCMP 0x10
+#define BWTWO_CTL_XTAL_MASK 0x0C
+#define BWTWO_CTL_DIVISOR_MASK 0x03
+
+/* Status Register Constants */
+#define BWTWO_STAT_PENDING_INT 0x80
+#define BWTWO_STAT_MSENSE_MASK 0x70
+#define BWTWO_STAT_ID_MASK 0x0f
+
+struct bw2_par {
+ spinlock_t lock;
+ struct bw2_regs __iomem *regs;
+
+ u32 flags;
+#define BW2_FLAG_BLANKED 0x00000001
+
+ unsigned long physbase;
+ unsigned long fbsize;
+
+ struct sbus_dev *sdev;
+ struct list_head list;
+};
+
+/**
+ * bw2_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
+bw2_blank(int blank, struct fb_info *info)
+{
+ struct bw2_par *par = (struct bw2_par *) info->par;
+ struct bw2_regs __iomem *regs = par->regs;
+ unsigned long flags;
+ u8 val;
+
+ spin_lock_irqsave(&par->lock, flags);
+
+ switch (blank) {
+ case FB_BLANK_UNBLANK: /* Unblanking */
+ val = sbus_readb(&regs->control);
+ val |= BWTWO_CTL_ENABLE_VIDEO;
+ sbus_writeb(val, &regs->control);
+ par->flags &= ~BW2_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_readb(&regs->control);
+ val &= ~BWTWO_CTL_ENABLE_VIDEO;
+ sbus_writeb(val, &regs->control);
+ par->flags |= BW2_FLAG_BLANKED;
+ break;
+ }
+
+ spin_unlock_irqrestore(&par->lock, flags);
+
+ return 0;
+}
+
+static struct sbus_mmap_map bw2_mmap_map[] = {
+ {
+ .size = SBUS_MMAP_FBSIZE(1)
+ },
+ { .size = 0 }
+};
+
+static int bw2_mmap(struct fb_info *info, struct file *file, struct vm_area_struct *vma)
+{
+ struct bw2_par *par = (struct bw2_par *)info->par;
+
+ return sbusfb_mmap_helper(bw2_mmap_map,
+ par->physbase, par->fbsize,
+ (par->sdev ?
+ par->sdev->reg_addrs[0].which_io :
+ 0),
+ vma);
+}
+
+static int bw2_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg, struct fb_info *info)
+{
+ struct bw2_par *par = (struct bw2_par *) info->par;
+
+ return sbusfb_ioctl_helper(cmd, arg, info,
+ FBTYPE_SUN2BW, 1, par->fbsize);
+}
+
+/*
+ * Initialisation
+ */
+
+static void
+bw2_init_fix(struct fb_info *info, int linebytes)
+{
+ strlcpy(info->fix.id, "bwtwo", sizeof(info->fix.id));
+
+ info->fix.type = FB_TYPE_PACKED_PIXELS;
+ info->fix.visual = FB_VISUAL_MONO01;
+
+ info->fix.line_length = linebytes;
+
+ info->fix.accel = FB_ACCEL_SUN_BWTWO;
+}
+
+static u8 bw2regs_1600[] __initdata = {
+ 0x14, 0x8b, 0x15, 0x28, 0x16, 0x03, 0x17, 0x13,
+ 0x18, 0x7b, 0x19, 0x05, 0x1a, 0x34, 0x1b, 0x2e,
+ 0x1c, 0x00, 0x1d, 0x0a, 0x1e, 0xff, 0x1f, 0x01,
+ 0x10, 0x21, 0
+};
+
+static u8 bw2regs_ecl[] __initdata = {
+ 0x14, 0x65, 0x15, 0x1e, 0x16, 0x04, 0x17, 0x0c,
+ 0x18, 0x5e, 0x19, 0x03, 0x1a, 0xa7, 0x1b, 0x23,
+ 0x1c, 0x00, 0x1d, 0x08, 0x1e, 0xff, 0x1f, 0x01,
+ 0x10, 0x20, 0
+};
+
+static u8 bw2regs_analog[] __initdata = {
+ 0x14, 0xbb, 0x15, 0x2b, 0x16, 0x03, 0x17, 0x13,
+ 0x18, 0xb0, 0x19, 0x03, 0x1a, 0xa6, 0x1b, 0x22,
+ 0x1c, 0x01, 0x1d, 0x05, 0x1e, 0xff, 0x1f, 0x01,
+ 0x10, 0x20, 0
+};
+
+static u8 bw2regs_76hz[] __initdata = {
+ 0x14, 0xb7, 0x15, 0x27, 0x16, 0x03, 0x17, 0x0f,
+ 0x18, 0xae, 0x19, 0x03, 0x1a, 0xae, 0x1b, 0x2a,
+ 0x1c, 0x01, 0x1d, 0x09, 0x1e, 0xff, 0x1f, 0x01,
+ 0x10, 0x24, 0
+};
+
+static u8 bw2regs_66hz[] __initdata = {
+ 0x14, 0xbb, 0x15, 0x2b, 0x16, 0x04, 0x17, 0x14,
+ 0x18, 0xae, 0x19, 0x03, 0x1a, 0xa8, 0x1b, 0x24,
+ 0x1c, 0x01, 0x1d, 0x05, 0x1e, 0xff, 0x1f, 0x01,
+ 0x10, 0x20, 0
+};
+
+static void bw2_do_default_mode(struct bw2_par *par, struct fb_info *info,
+ int *linebytes)
+{
+ u8 status, mon;
+ u8 *p;
+
+ status = sbus_readb(&par->regs->status);
+ mon = status & BWTWO_SR_RES_MASK;
+ switch (status & BWTWO_SR_ID_MASK) {
+ case BWTWO_SR_ID_MONO_ECL:
+ if (mon == BWTWO_SR_1600_1280) {
+ p = bw2regs_1600;
+ info->var.xres = info->var.xres_virtual = 1600;
+ info->var.yres = info->var.yres_virtual = 1280;
+ *linebytes = 1600 / 8;
+ } else
+ p = bw2regs_ecl;
+ break;
+
+ case BWTWO_SR_ID_MONO:
+ p = bw2regs_analog;
+ break;
+
+ case BWTWO_SR_ID_MSYNC:
+ if (mon == BWTWO_SR_1152_900_76_A ||
+ mon == BWTWO_SR_1152_900_76_B)
+ p = bw2regs_76hz;
+ else
+ p = bw2regs_66hz;
+ break;
+
+ case BWTWO_SR_ID_NOCONN:
+ return;
+
+ default:
+ prom_printf("bw2: can't handle SR %02x\n",
+ status);
+ prom_halt();
+ }
+ for ( ; *p; p += 2) {
+ u8 __iomem *regp = &((u8 __iomem *)par->regs)[p[0]];
+ sbus_writeb(p[1], regp);
+ }
+}
+
+struct all_info {
+ struct fb_info info;
+ struct bw2_par par;
+ struct list_head list;
+};
+static LIST_HEAD(bw2_list);
+
+static void bw2_init_one(struct sbus_dev *sdev)
+{
+ struct all_info *all;
+ struct resource *resp;
+#ifdef CONFIG_SUN4
+ struct resource res;
+#endif
+ int linebytes;
+
+ all = kmalloc(sizeof(*all), GFP_KERNEL);
+ if (!all) {
+ printk(KERN_ERR "bw2: Cannot allocate memory.\n");
+ return;
+ }
+ memset(all, 0, sizeof(*all));
+
+ INIT_LIST_HEAD(&all->list);
+
+ spin_lock_init(&all->par.lock);
+ all->par.sdev = sdev;
+
+#ifdef CONFIG_SUN4
+ if (!sdev) {
+ all->par.physbase = sun4_bwtwo_physaddr;
+ res.start = sun4_bwtwo_physaddr;
+ res.end = res.start + BWTWO_REGISTER_OFFSET + sizeof(struct bw2_regs) - 1;
+ res.flags = IORESOURCE_IO;
+ resp = &res;
+ all->info.var.xres = all->info.var.xres_virtual = 1152;
+ all->info.var.yres = all->info.var.yres_virtual = 900;
+ all->info.var.bits_per_pixel = 1;
+ linebytes = 1152 / 8;
+ } else
+#else
+ {
+ if (!sdev)
+ BUG();
+ all->par.physbase = sdev->reg_addrs[0].phys_addr;
+ resp = &sdev->resource[0];
+ sbusfb_fill_var(&all->info.var, (sdev ? sdev->prom_node : 0), 1);
+ linebytes = prom_getintdefault(sdev->prom_node, "linebytes",
+ all->info.var.xres);
+ }
+#endif
+ all->info.var.red.length = all->info.var.green.length =
+ all->info.var.blue.length = all->info.var.bits_per_pixel;
+ all->info.var.red.offset = all->info.var.green.offset =
+ all->info.var.blue.offset = 0;
+
+ all->par.regs = sbus_ioremap(resp, BWTWO_REGISTER_OFFSET,
+ sizeof(struct bw2_regs), "bw2 regs");
+
+ if (sdev && !prom_getbool(sdev->prom_node, "width"))
+ bw2_do_default_mode(&all->par, &all->info, &linebytes);
+
+ all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);
+
+ all->info.flags = FBINFO_DEFAULT;
+ all->info.fbops = &bw2_ops;
+#if defined(CONFIG_SPARC32)
+ if (sdev)
+ all->info.screen_base = (char __iomem *)
+ prom_getintdefault(sdev->prom_node, "address", 0);
+#endif
+ if (!all->info.screen_base)
+ all->info.screen_base =
+ sbus_ioremap(resp, 0, all->par.fbsize, "bw2 ram");
+ all->info.par = &all->par;
+
+ bw2_blank(0, &all->info);
+
+ bw2_init_fix(&all->info, linebytes);
+
+ if (register_framebuffer(&all->info) < 0) {
+ printk(KERN_ERR "bw2: Could not register framebuffer.\n");
+ kfree(all);
+ return;
+ }
+
+ list_add(&all->list, &bw2_list);
+
+ printk("bw2: bwtwo at %lx:%lx\n",
+ (long) (sdev ? sdev->reg_addrs[0].which_io : 0),
+ (long) all->par.physbase);
+}
+
+int __init bw2_init(void)
+{
+ struct sbus_bus *sbus;
+ struct sbus_dev *sdev;
+
+ if (fb_get_options("bw2fb", NULL))
+ return -ENODEV;
+
+#ifdef CONFIG_SUN4
+ bw2_init_one(NULL);
+#endif
+ for_all_sbusdev(sdev, sbus) {
+ if (!strcmp(sdev->prom_name, "bwtwo"))
+ bw2_init_one(sdev);
+ }
+
+ return 0;
+}
+
+void __exit bw2_exit(void)
+{
+ struct list_head *pos, *tmp;
+
+ list_for_each_safe(pos, tmp, &bw2_list) {
+ struct all_info *all = list_entry(pos, typeof(*all), list);
+
+ unregister_framebuffer(&all->info);
+ kfree(all);
+ }
+}
+
+int __init
+bw2_setup(char *arg)
+{
+ /* No cmdline options yet... */
+ return 0;
+}
+
+module_init(bw2_init);
+
+#ifdef MODULE
+module_exit(bw2_exit);
+#endif
+
+MODULE_DESCRIPTION("framebuffer driver for BWTWO chipsets");
+MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-23 20:32:46 +0000