| // 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 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_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 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"); |