diff options
Diffstat (limited to 'drivers/video/fbdev/tcx.c')
-rw-r--r-- | drivers/video/fbdev/tcx.c | 540 |
1 files changed, 540 insertions, 0 deletions
diff --git a/drivers/video/fbdev/tcx.c b/drivers/video/fbdev/tcx.c new file mode 100644 index 000000000..c98d8a569 --- /dev/null +++ b/drivers/video/fbdev/tcx.c @@ -0,0 +1,540 @@ +/* tcx.c: TCX frame buffer driver + * + * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net) + * 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/delay.h> +#include <linux/init.h> +#include <linux/fb.h> +#include <linux/mm.h> +#include <linux/of_device.h> + +#include <asm/io.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 vm_area_struct *); +static int tcx_ioctl(struct fb_info *, unsigned int, unsigned long); +static int tcx_pan_display(struct fb_var_screeninfo *, struct fb_info *); + +/* + * Frame buffer operations + */ + +static struct fb_ops tcx_ops = { + .owner = THIS_MODULE, + .fb_setcolreg = tcx_setcolreg, + .fb_blank = tcx_blank, + .fb_pan_display = tcx_pan_display, + .fb_fillrect = cfb_fillrect, + .fb_copyarea = cfb_copyarea, + .fb_imageblit = cfb_imageblit, + .fb_mmap = tcx_mmap, + .fb_ioctl = tcx_ioctl, +#ifdef CONFIG_COMPAT + .fb_compat_ioctl = sbusfb_compat_ioctl, +#endif +}; + +/* 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 { + u32 tec_matrix; + u32 tec_clip; + u32 tec_vdc; +}; + +struct tcx_thc { + u32 thc_rev; + u32 thc_pad0[511]; + u32 thc_hs; /* hsync timing */ + u32 thc_hsdvs; + u32 thc_hd; + u32 thc_vs; /* vsync timing */ + u32 thc_vd; + u32 thc_refresh; + u32 thc_misc; + u32 thc_pad1[56]; + u32 thc_cursxy; /* cursor x,y position (16 bits each) */ + u32 thc_cursmask[32]; /* cursor mask bits */ + u32 thc_cursbits[32]; /* what to show where mask enabled */ +}; + +struct bt_regs { + u32 addr; + u32 color_map; + u32 control; + 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; + u32 __iomem *cplane; + + u32 flags; +#define TCX_FLAG_BLANKED 0x00000001 + + unsigned long which_io; + + struct sbus_mmap_map mmap_map[TCX_MMAP_ENTRIES]; + int lowdepth; +}; + +/* Reset control plane so that WID is 8-bit plane. */ +static void __tcx_set_control_plane(struct fb_info *info) +{ + struct tcx_par *par = info->par; + u32 __iomem *p, *pend; + + if (par->lowdepth) + return; + + p = par->cplane; + if (p == NULL) + return; + for (pend = p + info->fix.smem_len; 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(info); + spin_unlock_irqrestore(&par->lock, flags); +} + +static int tcx_pan_display(struct fb_var_screeninfo *var, struct fb_info *info) +{ + tcx_reset(info); + return 0; +} + +/** + * 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 vm_area_struct *vma) +{ + struct tcx_par *par = (struct tcx_par *)info->par; + + return sbusfb_mmap_helper(par->mmap_map, + info->fix.smem_start, info->fix.smem_len, + par->which_io, vma); +} + +static int tcx_ioctl(struct fb_info *info, unsigned int cmd, + unsigned long arg) +{ + struct tcx_par *par = (struct tcx_par *) info->par; + + return sbusfb_ioctl_helper(cmd, arg, info, + FBTYPE_TCXCOLOR, + (par->lowdepth ? 8 : 24), + info->fix.smem_len); +} + +/* + * 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; +} + +static void tcx_unmap_regs(struct platform_device *op, struct fb_info *info, + struct tcx_par *par) +{ + if (par->tec) + of_iounmap(&op->resource[7], + par->tec, sizeof(struct tcx_tec)); + if (par->thc) + of_iounmap(&op->resource[9], + par->thc, sizeof(struct tcx_thc)); + if (par->bt) + of_iounmap(&op->resource[8], + par->bt, sizeof(struct bt_regs)); + if (par->cplane) + of_iounmap(&op->resource[4], + par->cplane, info->fix.smem_len * sizeof(u32)); + if (info->screen_base) + of_iounmap(&op->resource[0], + info->screen_base, info->fix.smem_len); +} + +static int tcx_probe(struct platform_device *op) +{ + struct device_node *dp = op->dev.of_node; + struct fb_info *info; + struct tcx_par *par; + int linebytes, i, err; + + info = framebuffer_alloc(sizeof(struct tcx_par), &op->dev); + + err = -ENOMEM; + if (!info) + goto out_err; + par = info->par; + + spin_lock_init(&par->lock); + + par->lowdepth = + (of_find_property(dp, "tcx-8-bit", NULL) != NULL); + + sbusfb_fill_var(&info->var, dp, 8); + info->var.red.length = 8; + info->var.green.length = 8; + info->var.blue.length = 8; + + linebytes = of_getintprop_default(dp, "linebytes", + info->var.xres); + info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres); + + par->tec = of_ioremap(&op->resource[7], 0, + sizeof(struct tcx_tec), "tcx tec"); + par->thc = of_ioremap(&op->resource[9], 0, + sizeof(struct tcx_thc), "tcx thc"); + par->bt = of_ioremap(&op->resource[8], 0, + sizeof(struct bt_regs), "tcx dac"); + info->screen_base = of_ioremap(&op->resource[0], 0, + info->fix.smem_len, "tcx ram"); + if (!par->tec || !par->thc || + !par->bt || !info->screen_base) + goto out_unmap_regs; + + memcpy(&par->mmap_map, &__tcx_mmap_map, sizeof(par->mmap_map)); + if (!par->lowdepth) { + par->cplane = of_ioremap(&op->resource[4], 0, + info->fix.smem_len * sizeof(u32), + "tcx cplane"); + if (!par->cplane) + goto out_unmap_regs; + } else { + par->mmap_map[1].size = SBUS_MMAP_EMPTY; + par->mmap_map[4].size = SBUS_MMAP_EMPTY; + par->mmap_map[5].size = SBUS_MMAP_EMPTY; + par->mmap_map[6].size = SBUS_MMAP_EMPTY; + } + + info->fix.smem_start = op->resource[0].start; + par->which_io = op->resource[0].flags & IORESOURCE_BITS; + + 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; + } + par->mmap_map[i].poff = op->resource[j].start; + } + + info->flags = FBINFO_DEFAULT; + info->fbops = &tcx_ops; + + /* Initialize brooktree DAC. */ + sbus_writel(0x04 << 24, &par->bt->addr); /* color planes */ + sbus_writel(0xff << 24, &par->bt->control); + sbus_writel(0x05 << 24, &par->bt->addr); + sbus_writel(0x00 << 24, &par->bt->control); + sbus_writel(0x06 << 24, &par->bt->addr); /* overlay plane */ + sbus_writel(0x73 << 24, &par->bt->control); + sbus_writel(0x07 << 24, &par->bt->addr); + sbus_writel(0x00 << 24, &par->bt->control); + + tcx_reset(info); + + tcx_blank(FB_BLANK_UNBLANK, info); + + if (fb_alloc_cmap(&info->cmap, 256, 0)) + goto out_unmap_regs; + + fb_set_cmap(&info->cmap, info); + tcx_init_fix(info, linebytes); + + err = register_framebuffer(info); + if (err < 0) + goto out_dealloc_cmap; + + dev_set_drvdata(&op->dev, info); + + printk(KERN_INFO "%pOF: TCX at %lx:%lx, %s\n", + dp, + par->which_io, + info->fix.smem_start, + par->lowdepth ? "8-bit only" : "24-bit depth"); + + return 0; + +out_dealloc_cmap: + fb_dealloc_cmap(&info->cmap); + +out_unmap_regs: + tcx_unmap_regs(op, info, par); + framebuffer_release(info); + +out_err: + return err; +} + +static int tcx_remove(struct platform_device *op) +{ + struct fb_info *info = dev_get_drvdata(&op->dev); + struct tcx_par *par = info->par; + + unregister_framebuffer(info); + fb_dealloc_cmap(&info->cmap); + + tcx_unmap_regs(op, info, par); + + framebuffer_release(info); + + return 0; +} + +static const struct of_device_id tcx_match[] = { + { + .name = "SUNW,tcx", + }, + {}, +}; +MODULE_DEVICE_TABLE(of, tcx_match); + +static struct platform_driver tcx_driver = { + .driver = { + .name = "tcx", + .of_match_table = tcx_match, + }, + .probe = tcx_probe, + .remove = tcx_remove, +}; + +static int __init tcx_init(void) +{ + if (fb_get_options("tcxfb", NULL)) + return -ENODEV; + + return platform_driver_register(&tcx_driver); +} + +static void __exit tcx_exit(void) +{ + platform_driver_unregister(&tcx_driver); +} + +module_init(tcx_init); +module_exit(tcx_exit); + +MODULE_DESCRIPTION("framebuffer driver for TCX chipsets"); +MODULE_AUTHOR("David S. Miller <davem@davemloft.net>"); +MODULE_VERSION("2.0"); +MODULE_LICENSE("GPL"); |