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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/video/bw2.c | |
download | linux-fsl-qoriq-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/video/bw2.c')
-rw-r--r-- | drivers/video/bw2.c | 428 |
1 files changed, 428 insertions, 0 deletions
diff --git a/drivers/video/bw2.c b/drivers/video/bw2.c new file mode 100644 index 0000000..3d20b2d --- /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(®s->control); + val |= BWTWO_CTL_ENABLE_VIDEO; + sbus_writeb(val, ®s->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(®s->control); + val &= ~BWTWO_CTL_ENABLE_VIDEO; + sbus_writeb(val, ®s->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"); |