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Diffstat (limited to '')
| -rw-r--r-- | drivers/video/fbdev/p9100.c | 382 |
1 files changed, 382 insertions, 0 deletions
diff --git a/drivers/video/fbdev/p9100.c b/drivers/video/fbdev/p9100.c new file mode 100644 index 000000000..4e88a0a19 --- /dev/null +++ b/drivers/video/fbdev/p9100.c @@ -0,0 +1,382 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* p9100.c: P9100 frame buffer driver + * + * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net) + * 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/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 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 vm_area_struct *); +static int p9100_ioctl(struct fb_info *, unsigned int, unsigned long); + +/* + * Frame buffer operations + */ + +static const 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, +#ifdef CONFIG_COMPAT + .fb_compat_ioctl = sbusfb_compat_ioctl, +#endif +}; + +/* 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 */ + u32 sys_base; + u32 sys_config; + u32 sys_intr; + u32 sys_int_ena; + u32 sys_alt_rd; + u32 sys_alt_wr; + u32 sys_xxx[58]; + + /* Registers for the video control */ + u32 vid_base; + u32 vid_hcnt; + u32 vid_htotal; + u32 vid_hsync_rise; + u32 vid_hblank_rise; + u32 vid_hblank_fall; + u32 vid_hcnt_preload; + u32 vid_vcnt; + u32 vid_vlen; + u32 vid_vsync_rise; + u32 vid_vblank_rise; + u32 vid_vblank_fall; + u32 vid_vcnt_preload; + u32 vid_screenpaint_addr; + u32 vid_screenpaint_timectl1; + u32 vid_screenpaint_qsfcnt; + u32 vid_screenpaint_timectl2; + u32 vid_xxx[15]; + + /* Registers for the video control */ + u32 vram_base; + u32 vram_memcfg; + u32 vram_refresh_pd; + u32 vram_refresh_cnt; + u32 vram_raslo_max; + u32 vram_raslo_cur; + u32 pwrup_cfg; + u32 vram_xxx[25]; + + /* Registers for IBM RGB528 Palette */ + u32 ramdac_cmap_wridx; + u32 ramdac_palette_data; + u32 ramdac_pixel_mask; + u32 ramdac_palette_rdaddr; + u32 ramdac_idx_lo; + u32 ramdac_idx_hi; + u32 ramdac_idx_data; + u32 ramdac_idx_ctl; + u32 ramdac_xxx[1784]; +}; + +struct p9100_cmd_parameng { + u32 parameng_status; + u32 parameng_bltcmd; + u32 parameng_quadcmd; +}; + +struct p9100_par { + spinlock_t lock; + struct p9100_regs __iomem *regs; + + u32 flags; +#define P9100_FLAG_BLANKED 0x00000001 + + unsigned long which_io; +}; + +/** + * 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: 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 vm_area_struct *vma) +{ + struct p9100_par *par = (struct p9100_par *)info->par; + + return sbusfb_mmap_helper(p9100_mmap_map, + info->fix.smem_start, info->fix.smem_len, + par->which_io, vma); +} + +static int p9100_ioctl(struct fb_info *info, unsigned int cmd, + unsigned long arg) +{ + /* Make it look like a cg3. */ + return sbusfb_ioctl_helper(cmd, arg, info, + FBTYPE_SUN3COLOR, 8, info->fix.smem_len); +} + +/* + * Initialisation + */ + +static void p9100_init_fix(struct fb_info *info, int linebytes, struct device_node *dp) +{ + snprintf(info->fix.id, sizeof(info->fix.id), "%pOFn", dp); + + 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; +} + +static int p9100_probe(struct platform_device *op) +{ + struct device_node *dp = op->dev.of_node; + struct fb_info *info; + struct p9100_par *par; + int linebytes, err; + + info = framebuffer_alloc(sizeof(struct p9100_par), &op->dev); + + err = -ENOMEM; + if (!info) + goto out_err; + par = info->par; + + spin_lock_init(&par->lock); + + /* This is the framebuffer and the only resource apps can mmap. */ + info->fix.smem_start = op->resource[2].start; + par->which_io = op->resource[2].flags & IORESOURCE_BITS; + + 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->regs = of_ioremap(&op->resource[0], 0, + sizeof(struct p9100_regs), "p9100 regs"); + if (!par->regs) + goto out_release_fb; + + info->flags = FBINFO_DEFAULT; + info->fbops = &p9100_ops; + info->screen_base = of_ioremap(&op->resource[2], 0, + info->fix.smem_len, "p9100 ram"); + if (!info->screen_base) + goto out_unmap_regs; + + p9100_blank(FB_BLANK_UNBLANK, info); + + if (fb_alloc_cmap(&info->cmap, 256, 0)) + goto out_unmap_screen; + + p9100_init_fix(info, linebytes, dp); + + err = register_framebuffer(info); + if (err < 0) + goto out_dealloc_cmap; + + fb_set_cmap(&info->cmap, info); + + dev_set_drvdata(&op->dev, info); + + printk(KERN_INFO "%pOF: p9100 at %lx:%lx\n", + dp, + par->which_io, info->fix.smem_start); + + return 0; + +out_dealloc_cmap: + fb_dealloc_cmap(&info->cmap); + +out_unmap_screen: + of_iounmap(&op->resource[2], info->screen_base, info->fix.smem_len); + +out_unmap_regs: + of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs)); + +out_release_fb: + framebuffer_release(info); + +out_err: + return err; +} + +static int p9100_remove(struct platform_device *op) +{ + struct fb_info *info = dev_get_drvdata(&op->dev); + struct p9100_par *par = info->par; + + unregister_framebuffer(info); + fb_dealloc_cmap(&info->cmap); + + of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs)); + of_iounmap(&op->resource[2], info->screen_base, info->fix.smem_len); + + framebuffer_release(info); + + return 0; +} + +static const struct of_device_id p9100_match[] = { + { + .name = "p9100", + }, + {}, +}; +MODULE_DEVICE_TABLE(of, p9100_match); + +static struct platform_driver p9100_driver = { + .driver = { + .name = "p9100", + .of_match_table = p9100_match, + }, + .probe = p9100_probe, + .remove = p9100_remove, +}; + +static int __init p9100_init(void) +{ + if (fb_get_options("p9100fb", NULL)) + return -ENODEV; + + return platform_driver_register(&p9100_driver); +} + +static void __exit p9100_exit(void) +{ + platform_driver_unregister(&p9100_driver); +} + +module_init(p9100_init); +module_exit(p9100_exit); + +MODULE_DESCRIPTION("framebuffer driver for P9100 chipsets"); +MODULE_AUTHOR("David S. Miller <davem@davemloft.net>"); +MODULE_VERSION("2.0"); +MODULE_LICENSE("GPL"); |