diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/video/tcx.c |
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/tcx.c')
-rw-r--r-- | drivers/video/tcx.c | 504 |
1 files changed, 504 insertions, 0 deletions
diff --git a/drivers/video/tcx.c b/drivers/video/tcx.c new file mode 100644 index 00000000000..e2fa9e1ddc3 --- /dev/null +++ b/drivers/video/tcx.c @@ -0,0 +1,504 @@ +/* tcx.c: TCX 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) 1996 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> + +#include "sbuslib.h" + +/* + * Local functions. + */ + +static int tcx_setcolreg(unsigned, unsigned, unsigned, unsigned, + unsigned, struct fb_info *); +static int tcx_blank(int, struct fb_info *); + +static int tcx_mmap(struct fb_info *, struct file *, struct vm_area_struct *); +static int tcx_ioctl(struct inode *, struct file *, unsigned int, + unsigned long, struct fb_info *); + +/* + * Frame buffer operations + */ + +static struct fb_ops tcx_ops = { + .owner = THIS_MODULE, + .fb_setcolreg = tcx_setcolreg, + .fb_blank = tcx_blank, + .fb_fillrect = cfb_fillrect, + .fb_copyarea = cfb_copyarea, + .fb_imageblit = cfb_imageblit, + .fb_mmap = tcx_mmap, + .fb_ioctl = tcx_ioctl, + .fb_cursor = soft_cursor, +}; + +/* 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 */ +}; + +struct bt_regs { + volatile u32 addr; + volatile u32 color_map; + volatile u32 control; + volatile u32 cursor; +}; + +#define TCX_MMAP_ENTRIES 14 + +struct tcx_par { + spinlock_t lock; + struct bt_regs __iomem *bt; + struct tcx_thc __iomem *thc; + struct tcx_tec __iomem *tec; + volatile u32 __iomem *cplane; + + u32 flags; +#define TCX_FLAG_BLANKED 0x00000001 + + unsigned long physbase; + unsigned long fbsize; + + struct sbus_mmap_map mmap_map[TCX_MMAP_ENTRIES]; + int lowdepth; + + struct sbus_dev *sdev; + struct list_head list; +}; + +/* Reset control plane so that WID is 8-bit plane. */ +static void __tcx_set_control_plane (struct tcx_par *par) +{ + volatile u32 __iomem *p, *pend; + + if (par->lowdepth) + return; + + p = par->cplane; + if (p == NULL) + return; + for (pend = p + par->fbsize; p < pend; p++) { + u32 tmp = sbus_readl(p); + + tmp &= 0xffffff; + sbus_writel(tmp, p); + } +} + +static void tcx_reset (struct fb_info *info) +{ + struct tcx_par *par = (struct tcx_par *) info->par; + unsigned long flags; + + spin_lock_irqsave(&par->lock, flags); + __tcx_set_control_plane(par); + spin_unlock_irqrestore(&par->lock, flags); +} + +/** + * tcx_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 tcx_setcolreg(unsigned regno, + unsigned red, unsigned green, unsigned blue, + unsigned transp, struct fb_info *info) +{ + struct tcx_par *par = (struct tcx_par *) info->par; + struct bt_regs __iomem *bt = par->bt; + unsigned long flags; + + if (regno >= 256) + return 1; + + red >>= 8; + green >>= 8; + blue >>= 8; + + spin_lock_irqsave(&par->lock, flags); + + sbus_writel(regno << 24, &bt->addr); + sbus_writel(red << 24, &bt->color_map); + sbus_writel(green << 24, &bt->color_map); + sbus_writel(blue << 24, &bt->color_map); + + spin_unlock_irqrestore(&par->lock, flags); + + return 0; +} + +/** + * tcx_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 +tcx_blank(int blank, struct fb_info *info) +{ + struct tcx_par *par = (struct tcx_par *) info->par; + struct tcx_thc __iomem *thc = par->thc; + unsigned long flags; + u32 val; + + spin_lock_irqsave(&par->lock, flags); + + val = sbus_readl(&thc->thc_misc); + + switch (blank) { + case FB_BLANK_UNBLANK: /* Unblanking */ + val &= ~(TCX_THC_MISC_VSYNC_DIS | + TCX_THC_MISC_HSYNC_DIS); + val |= TCX_THC_MISC_VIDEO; + par->flags &= ~TCX_FLAG_BLANKED; + break; + + case FB_BLANK_NORMAL: /* Normal blanking */ + val &= ~TCX_THC_MISC_VIDEO; + par->flags |= TCX_FLAG_BLANKED; + break; + + case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */ + val |= TCX_THC_MISC_VSYNC_DIS; + break; + case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */ + val |= TCX_THC_MISC_HSYNC_DIS; + break; + + case FB_BLANK_POWERDOWN: /* Poweroff */ + break; + }; + + sbus_writel(val, &thc->thc_misc); + + spin_unlock_irqrestore(&par->lock, flags); + + return 0; +} + +static struct sbus_mmap_map __tcx_mmap_map[TCX_MMAP_ENTRIES] = { + { + .voff = TCX_RAM8BIT, + .size = SBUS_MMAP_FBSIZE(1) + }, + { + .voff = TCX_RAM24BIT, + .size = SBUS_MMAP_FBSIZE(4) + }, + { + .voff = TCX_UNK3, + .size = SBUS_MMAP_FBSIZE(8) + }, + { + .voff = TCX_UNK4, + .size = SBUS_MMAP_FBSIZE(8) + }, + { + .voff = TCX_CONTROLPLANE, + .size = SBUS_MMAP_FBSIZE(4) + }, + { + .voff = TCX_UNK6, + .size = SBUS_MMAP_FBSIZE(8) + }, + { + .voff = TCX_UNK7, + .size = SBUS_MMAP_FBSIZE(8) + }, + { + .voff = TCX_TEC, + .size = PAGE_SIZE + }, + { + .voff = TCX_BTREGS, + .size = PAGE_SIZE + }, + { + .voff = TCX_THC, + .size = PAGE_SIZE + }, + { + .voff = TCX_DHC, + .size = PAGE_SIZE + }, + { + .voff = TCX_ALT, + .size = PAGE_SIZE + }, + { + .voff = TCX_UNK2, + .size = 0x20000 + }, + { .size = 0 } +}; + +static int tcx_mmap(struct fb_info *info, struct file *file, struct vm_area_struct *vma) +{ + struct tcx_par *par = (struct tcx_par *)info->par; + + return sbusfb_mmap_helper(par->mmap_map, + par->physbase, par->fbsize, + par->sdev->reg_addrs[0].which_io, + vma); +} + +static int tcx_ioctl(struct inode *inode, struct file *file, unsigned int cmd, + unsigned long arg, struct fb_info *info) +{ + struct tcx_par *par = (struct tcx_par *) info->par; + + return sbusfb_ioctl_helper(cmd, arg, info, + FBTYPE_TCXCOLOR, + (par->lowdepth ? 8 : 24), + par->fbsize); +} + +/* + * Initialisation + */ + +static void +tcx_init_fix(struct fb_info *info, int linebytes) +{ + struct tcx_par *par = (struct tcx_par *)info->par; + const char *tcx_name; + + if (par->lowdepth) + tcx_name = "TCX8"; + else + tcx_name = "TCX24"; + + strlcpy(info->fix.id, tcx_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_TCX; +} + +struct all_info { + struct fb_info info; + struct tcx_par par; + struct list_head list; +}; +static LIST_HEAD(tcx_list); + +static void tcx_init_one(struct sbus_dev *sdev) +{ + struct all_info *all; + int linebytes, i; + + all = kmalloc(sizeof(*all), GFP_KERNEL); + if (!all) { + printk(KERN_ERR "tcx: 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; + + all->par.lowdepth = prom_getbool(sdev->prom_node, "tcx-8-bit"); + + 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.tec = sbus_ioremap(&sdev->resource[7], 0, + sizeof(struct tcx_tec), "tcx tec"); + all->par.thc = sbus_ioremap(&sdev->resource[9], 0, + sizeof(struct tcx_thc), "tcx thc"); + all->par.bt = sbus_ioremap(&sdev->resource[8], 0, + sizeof(struct bt_regs), "tcx dac"); + memcpy(&all->par.mmap_map, &__tcx_mmap_map, sizeof(all->par.mmap_map)); + if (!all->par.lowdepth) { + all->par.cplane = sbus_ioremap(&sdev->resource[4], 0, + all->par.fbsize * sizeof(u32), "tcx cplane"); + } else { + all->par.mmap_map[1].size = SBUS_MMAP_EMPTY; + all->par.mmap_map[4].size = SBUS_MMAP_EMPTY; + all->par.mmap_map[5].size = SBUS_MMAP_EMPTY; + all->par.mmap_map[6].size = SBUS_MMAP_EMPTY; + } + + all->par.physbase = 0; + for (i = 0; i < TCX_MMAP_ENTRIES; i++) { + int j; + + switch (i) { + case 10: + j = 12; + break; + + case 11: case 12: + j = i - 1; + break; + + default: + j = i; + break; + }; + all->par.mmap_map[i].poff = sdev->reg_addrs[j].phys_addr; + } + + all->info.flags = FBINFO_DEFAULT; + all->info.fbops = &tcx_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[0], 0, + all->par.fbsize, "tcx ram"); + all->info.par = &all->par; + + /* Initialize brooktree DAC. */ + sbus_writel(0x04 << 24, &all->par.bt->addr); /* color planes */ + sbus_writel(0xff << 24, &all->par.bt->control); + sbus_writel(0x05 << 24, &all->par.bt->addr); + sbus_writel(0x00 << 24, &all->par.bt->control); + sbus_writel(0x06 << 24, &all->par.bt->addr); /* overlay plane */ + sbus_writel(0x73 << 24, &all->par.bt->control); + sbus_writel(0x07 << 24, &all->par.bt->addr); + sbus_writel(0x00 << 24, &all->par.bt->control); + + tcx_reset(&all->info); + + tcx_blank(0, &all->info); + + if (fb_alloc_cmap(&all->info.cmap, 256, 0)) { + printk(KERN_ERR "tcx: Could not allocate color map.\n"); + kfree(all); + return; + } + + tcx_init_fix(&all->info, linebytes); + + if (register_framebuffer(&all->info) < 0) { + printk(KERN_ERR "tcx: Could not register framebuffer.\n"); + fb_dealloc_cmap(&all->info.cmap); + kfree(all); + return; + } + + list_add(&all->list, &tcx_list); + + printk("tcx: %s at %lx:%lx, %s\n", + sdev->prom_name, + (long) sdev->reg_addrs[0].which_io, + (long) sdev->reg_addrs[0].phys_addr, + all->par.lowdepth ? "8-bit only" : "24-bit depth"); +} + +int __init tcx_init(void) +{ + struct sbus_bus *sbus; + struct sbus_dev *sdev; + + if (fb_get_options("tcxfb", NULL)) + return -ENODEV; + + for_all_sbusdev(sdev, sbus) { + if (!strcmp(sdev->prom_name, "tcx")) + tcx_init_one(sdev); + } + + return 0; +} + +void __exit tcx_exit(void) +{ + struct list_head *pos, *tmp; + + list_for_each_safe(pos, tmp, &tcx_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 +tcx_setup(char *arg) +{ + /* No cmdline options yet... */ + return 0; +} + +module_init(tcx_init); + +#ifdef MODULE +module_exit(tcx_exit); +#endif + +MODULE_DESCRIPTION("framebuffer driver for TCX chipsets"); +MODULE_AUTHOR("David S. Miller <davem@redhat.com>"); +MODULE_LICENSE("GPL"); |