diff options
Diffstat (limited to 'drivers/video/p9100.c')
| -rw-r--r-- | drivers/video/p9100.c | 379 |
1 files changed, 379 insertions, 0 deletions
diff --git a/drivers/video/p9100.c b/drivers/video/p9100.c new file mode 100644 index 0000000..7808a01 --- /dev/null +++ b/drivers/video/p9100.c @@ -0,0 +1,379 @@ +/* p9100.c: P9100 frame buffer driver + * + * Copyright (C) 2003 David S. Miller (davem@redhat.com) + * Copyright 1999 Derrick J Brashear (shadow@dementia.org) + * + * 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> + +#include "sbuslib.h" + +/* + * Local functions. + */ + +static int p9100_setcolreg(unsigned, unsigned, unsigned, unsigned, + unsigned, struct fb_info *); +static int p9100_blank(int, struct fb_info *); + +static int p9100_mmap(struct fb_info *, struct file *, struct vm_area_struct *); +static int p9100_ioctl(struct inode *, struct file *, unsigned int, + unsigned long, struct fb_info *); + +/* + * Frame buffer operations + */ + +static struct fb_ops p9100_ops = { + .owner = THIS_MODULE, + .fb_setcolreg = p9100_setcolreg, + .fb_blank = p9100_blank, + .fb_fillrect = cfb_fillrect, + .fb_copyarea = cfb_copyarea, + .fb_imageblit = cfb_imageblit, + .fb_mmap = p9100_mmap, + .fb_ioctl = p9100_ioctl, + .fb_cursor = soft_cursor, +}; + +/* P9100 control registers */ +#define P9100_SYSCTL_OFF 0x0UL +#define P9100_VIDEOCTL_OFF 0x100UL +#define P9100_VRAMCTL_OFF 0x180UL +#define P9100_RAMDAC_OFF 0x200UL +#define P9100_VIDEOCOPROC_OFF 0x400UL + +/* P9100 command registers */ +#define P9100_CMD_OFF 0x0UL + +/* P9100 framebuffer memory */ +#define P9100_FB_OFF 0x0UL + +/* 3 bits: 2=8bpp 3=16bpp 5=32bpp 7=24bpp */ +#define SYS_CONFIG_PIXELSIZE_SHIFT 26 + +#define SCREENPAINT_TIMECTL1_ENABLE_VIDEO 0x20 /* 0 = off, 1 = on */ + +struct p9100_regs { + /* Registers for the system control */ + volatile u32 sys_base; + volatile u32 sys_config; + volatile u32 sys_intr; + volatile u32 sys_int_ena; + volatile u32 sys_alt_rd; + volatile u32 sys_alt_wr; + volatile u32 sys_xxx[58]; + + /* Registers for the video control */ + volatile u32 vid_base; + volatile u32 vid_hcnt; + volatile u32 vid_htotal; + volatile u32 vid_hsync_rise; + volatile u32 vid_hblank_rise; + volatile u32 vid_hblank_fall; + volatile u32 vid_hcnt_preload; + volatile u32 vid_vcnt; + volatile u32 vid_vlen; + volatile u32 vid_vsync_rise; + volatile u32 vid_vblank_rise; + volatile u32 vid_vblank_fall; + volatile u32 vid_vcnt_preload; + volatile u32 vid_screenpaint_addr; + volatile u32 vid_screenpaint_timectl1; + volatile u32 vid_screenpaint_qsfcnt; + volatile u32 vid_screenpaint_timectl2; + volatile u32 vid_xxx[15]; + + /* Registers for the video control */ + volatile u32 vram_base; + volatile u32 vram_memcfg; + volatile u32 vram_refresh_pd; + volatile u32 vram_refresh_cnt; + volatile u32 vram_raslo_max; + volatile u32 vram_raslo_cur; + volatile u32 pwrup_cfg; + volatile u32 vram_xxx[25]; + + /* Registers for IBM RGB528 Palette */ + volatile u32 ramdac_cmap_wridx; + volatile u32 ramdac_palette_data; + volatile u32 ramdac_pixel_mask; + volatile u32 ramdac_palette_rdaddr; + volatile u32 ramdac_idx_lo; + volatile u32 ramdac_idx_hi; + volatile u32 ramdac_idx_data; + volatile u32 ramdac_idx_ctl; + volatile u32 ramdac_xxx[1784]; +}; + +struct p9100_cmd_parameng { + volatile u32 parameng_status; + volatile u32 parameng_bltcmd; + volatile u32 parameng_quadcmd; +}; + +struct p9100_par { + spinlock_t lock; + struct p9100_regs __iomem *regs; + + u32 flags; +#define P9100_FLAG_BLANKED 0x00000001 + + unsigned long physbase; + unsigned long fbsize; + + struct sbus_dev *sdev; + struct list_head list; +}; + +/** + * p9100_setcolreg - Optional function. 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 p9100_setcolreg(unsigned regno, + unsigned red, unsigned green, unsigned blue, + unsigned transp, struct fb_info *info) +{ + struct p9100_par *par = (struct p9100_par *) info->par; + struct p9100_regs __iomem *regs = par->regs; + unsigned long flags; + + if (regno >= 256) + return 1; + + red >>= 8; + green >>= 8; + blue >>= 8; + + spin_lock_irqsave(&par->lock, flags); + + sbus_writel((regno << 16), ®s->ramdac_cmap_wridx); + sbus_writel((red << 16), ®s->ramdac_palette_data); + sbus_writel((green << 16), ®s->ramdac_palette_data); + sbus_writel((blue << 16), ®s->ramdac_palette_data); + + spin_unlock_irqrestore(&par->lock, flags); + + return 0; +} + +/** + * p9100_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 +p9100_blank(int blank, struct fb_info *info) +{ + struct p9100_par *par = (struct p9100_par *) info->par; + struct p9100_regs __iomem *regs = par->regs; + unsigned long flags; + u32 val; + + spin_lock_irqsave(&par->lock, flags); + + switch (blank) { + case FB_BLANK_UNBLANK: /* Unblanking */ + val = sbus_readl(®s->vid_screenpaint_timectl1); + val |= SCREENPAINT_TIMECTL1_ENABLE_VIDEO; + sbus_writel(val, ®s->vid_screenpaint_timectl1); + par->flags &= ~P9100_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_readl(®s->vid_screenpaint_timectl1); + val &= ~SCREENPAINT_TIMECTL1_ENABLE_VIDEO; + sbus_writel(val, ®s->vid_screenpaint_timectl1); + par->flags |= P9100_FLAG_BLANKED; + break; + } + + spin_unlock_irqrestore(&par->lock, flags); + + return 0; +} + +static struct sbus_mmap_map p9100_mmap_map[] = { + { CG3_MMAP_OFFSET, 0, SBUS_MMAP_FBSIZE(1) }, + { 0, 0, 0 } +}; + +static int p9100_mmap(struct fb_info *info, struct file *file, struct vm_area_struct *vma) +{ + struct p9100_par *par = (struct p9100_par *)info->par; + + return sbusfb_mmap_helper(p9100_mmap_map, + par->physbase, par->fbsize, + par->sdev->reg_addrs[0].which_io, + vma); +} + +static int p9100_ioctl(struct inode *inode, struct file *file, unsigned int cmd, + unsigned long arg, struct fb_info *info) +{ + struct p9100_par *par = (struct p9100_par *) info->par; + + /* Make it look like a cg3. */ + return sbusfb_ioctl_helper(cmd, arg, info, + FBTYPE_SUN3COLOR, 8, par->fbsize); +} + +/* + * Initialisation + */ + +static void +p9100_init_fix(struct fb_info *info, int linebytes) +{ + struct p9100_par *par = (struct p9100_par *)info->par; + + strlcpy(info->fix.id, par->sdev->prom_name, sizeof(info->fix.id)); + + info->fix.type = FB_TYPE_PACKED_PIXELS; + info->fix.visual = FB_VISUAL_PSEUDOCOLOR; + + info->fix.line_length = linebytes; + + info->fix.accel = FB_ACCEL_SUN_CGTHREE; +} + +struct all_info { + struct fb_info info; + struct p9100_par par; + struct list_head list; +}; +static LIST_HEAD(p9100_list); + +static void p9100_init_one(struct sbus_dev *sdev) +{ + struct all_info *all; + int linebytes; + + all = kmalloc(sizeof(*all), GFP_KERNEL); + if (!all) { + printk(KERN_ERR "p9100: 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; + + /* This is the framebuffer and the only resource apps can mmap. */ + all->par.physbase = sdev->reg_addrs[2].phys_addr; + + sbusfb_fill_var(&all->info.var, sdev->prom_node, 8); + + linebytes = prom_getintdefault(sdev->prom_node, "linebytes", + all->info.var.xres); + all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres); + + all->par.regs = sbus_ioremap(&sdev->resource[0], 0, + sizeof(struct p9100_regs), "p9100 regs"); + + all->info.flags = FBINFO_DEFAULT; + all->info.fbops = &p9100_ops; +#ifdef CONFIG_SPARC32 + 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(&sdev->resource[2], 0, + all->par.fbsize, "p9100 ram"); + all->info.par = &all->par; + + p9100_blank(0, &all->info); + + if (fb_alloc_cmap(&all->info.cmap, 256, 0)) { + printk(KERN_ERR "p9100: Could not allocate color map.\n"); + kfree(all); + return; + } + + p9100_init_fix(&all->info, linebytes); + + if (register_framebuffer(&all->info) < 0) { + printk(KERN_ERR "p9100: Could not register framebuffer.\n"); + fb_dealloc_cmap(&all->info.cmap); + kfree(all); + return; + } + + list_add(&all->list, &p9100_list); + + printk("p9100: %s at %lx:%lx\n", + sdev->prom_name, + (long) sdev->reg_addrs[0].which_io, + (long) sdev->reg_addrs[0].phys_addr); +} + +int __init p9100_init(void) +{ + struct sbus_bus *sbus; + struct sbus_dev *sdev; + + if (fb_get_options("p9100fb", NULL)) + return -ENODEV; + + for_all_sbusdev(sdev, sbus) { + if (!strcmp(sdev->prom_name, "p9100")) + p9100_init_one(sdev); + } + + return 0; +} + +void __exit p9100_exit(void) +{ + struct list_head *pos, *tmp; + + list_for_each_safe(pos, tmp, &p9100_list) { + struct all_info *all = list_entry(pos, typeof(*all), list); + + unregister_framebuffer(&all->info); + fb_dealloc_cmap(&all->info.cmap); + kfree(all); + } +} + +int __init +p9100_setup(char *arg) +{ + /* No cmdline options yet... */ + return 0; +} + +module_init(p9100_init); + +#ifdef MODULE +module_exit(p9100_exit); +#endif + +MODULE_DESCRIPTION("framebuffer driver for P9100 chipsets"); +MODULE_AUTHOR("David S. Miller <davem@redhat.com>"); +MODULE_LICENSE("GPL"); |
