1 // SPDX-License-Identifier: GPL-2.0-only 2 /* p9100.c: P9100 frame buffer driver 3 * 4 * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net) 5 * Copyright 1999 Derrick J Brashear (shadow@dementia.org) 6 * 7 * Driver layout based loosely on tgafb.c, see that file for credits. 8 */ 9 10 #include <linux/module.h> 11 #include <linux/kernel.h> 12 #include <linux/errno.h> 13 #include <linux/string.h> 14 #include <linux/delay.h> 15 #include <linux/init.h> 16 #include <linux/fb.h> 17 #include <linux/mm.h> 18 #include <linux/of.h> 19 #include <linux/platform_device.h> 20 21 #include <asm/io.h> 22 #include <asm/fbio.h> 23 24 #include "sbuslib.h" 25 26 /* 27 * Local functions. 28 */ 29 30 static int p9100_setcolreg(unsigned, unsigned, unsigned, unsigned, 31 unsigned, struct fb_info *); 32 static int p9100_blank(int, struct fb_info *); 33 34 static int p9100_mmap(struct fb_info *, struct vm_area_struct *); 35 static int p9100_ioctl(struct fb_info *, unsigned int, unsigned long); 36 37 /* 38 * Frame buffer operations 39 */ 40 41 static const struct fb_ops p9100_ops = { 42 .owner = THIS_MODULE, 43 .fb_setcolreg = p9100_setcolreg, 44 .fb_blank = p9100_blank, 45 .fb_fillrect = cfb_fillrect, 46 .fb_copyarea = cfb_copyarea, 47 .fb_imageblit = cfb_imageblit, 48 .fb_mmap = p9100_mmap, 49 .fb_ioctl = p9100_ioctl, 50 #ifdef CONFIG_COMPAT 51 .fb_compat_ioctl = sbusfb_compat_ioctl, 52 #endif 53 }; 54 55 /* P9100 control registers */ 56 #define P9100_SYSCTL_OFF 0x0UL 57 #define P9100_VIDEOCTL_OFF 0x100UL 58 #define P9100_VRAMCTL_OFF 0x180UL 59 #define P9100_RAMDAC_OFF 0x200UL 60 #define P9100_VIDEOCOPROC_OFF 0x400UL 61 62 /* P9100 command registers */ 63 #define P9100_CMD_OFF 0x0UL 64 65 /* P9100 framebuffer memory */ 66 #define P9100_FB_OFF 0x0UL 67 68 /* 3 bits: 2=8bpp 3=16bpp 5=32bpp 7=24bpp */ 69 #define SYS_CONFIG_PIXELSIZE_SHIFT 26 70 71 #define SCREENPAINT_TIMECTL1_ENABLE_VIDEO 0x20 /* 0 = off, 1 = on */ 72 73 struct p9100_regs { 74 /* Registers for the system control */ 75 u32 sys_base; 76 u32 sys_config; 77 u32 sys_intr; 78 u32 sys_int_ena; 79 u32 sys_alt_rd; 80 u32 sys_alt_wr; 81 u32 sys_xxx[58]; 82 83 /* Registers for the video control */ 84 u32 vid_base; 85 u32 vid_hcnt; 86 u32 vid_htotal; 87 u32 vid_hsync_rise; 88 u32 vid_hblank_rise; 89 u32 vid_hblank_fall; 90 u32 vid_hcnt_preload; 91 u32 vid_vcnt; 92 u32 vid_vlen; 93 u32 vid_vsync_rise; 94 u32 vid_vblank_rise; 95 u32 vid_vblank_fall; 96 u32 vid_vcnt_preload; 97 u32 vid_screenpaint_addr; 98 u32 vid_screenpaint_timectl1; 99 u32 vid_screenpaint_qsfcnt; 100 u32 vid_screenpaint_timectl2; 101 u32 vid_xxx[15]; 102 103 /* Registers for the video control */ 104 u32 vram_base; 105 u32 vram_memcfg; 106 u32 vram_refresh_pd; 107 u32 vram_refresh_cnt; 108 u32 vram_raslo_max; 109 u32 vram_raslo_cur; 110 u32 pwrup_cfg; 111 u32 vram_xxx[25]; 112 113 /* Registers for IBM RGB528 Palette */ 114 u32 ramdac_cmap_wridx; 115 u32 ramdac_palette_data; 116 u32 ramdac_pixel_mask; 117 u32 ramdac_palette_rdaddr; 118 u32 ramdac_idx_lo; 119 u32 ramdac_idx_hi; 120 u32 ramdac_idx_data; 121 u32 ramdac_idx_ctl; 122 u32 ramdac_xxx[1784]; 123 }; 124 125 struct p9100_cmd_parameng { 126 u32 parameng_status; 127 u32 parameng_bltcmd; 128 u32 parameng_quadcmd; 129 }; 130 131 struct p9100_par { 132 spinlock_t lock; 133 struct p9100_regs __iomem *regs; 134 135 u32 flags; 136 #define P9100_FLAG_BLANKED 0x00000001 137 138 unsigned long which_io; 139 }; 140 141 /** 142 * p9100_setcolreg - Optional function. Sets a color register. 143 * @regno: boolean, 0 copy local, 1 get_user() function 144 * @red: frame buffer colormap structure 145 * @green: The green value which can be up to 16 bits wide 146 * @blue: The blue value which can be up to 16 bits wide. 147 * @transp: If supported the alpha value which can be up to 16 bits wide. 148 * @info: frame buffer info structure 149 */ 150 static int p9100_setcolreg(unsigned regno, 151 unsigned red, unsigned green, unsigned blue, 152 unsigned transp, struct fb_info *info) 153 { 154 struct p9100_par *par = (struct p9100_par *) info->par; 155 struct p9100_regs __iomem *regs = par->regs; 156 unsigned long flags; 157 158 if (regno >= 256) 159 return 1; 160 161 red >>= 8; 162 green >>= 8; 163 blue >>= 8; 164 165 spin_lock_irqsave(&par->lock, flags); 166 167 sbus_writel((regno << 16), ®s->ramdac_cmap_wridx); 168 sbus_writel((red << 16), ®s->ramdac_palette_data); 169 sbus_writel((green << 16), ®s->ramdac_palette_data); 170 sbus_writel((blue << 16), ®s->ramdac_palette_data); 171 172 spin_unlock_irqrestore(&par->lock, flags); 173 174 return 0; 175 } 176 177 /** 178 * p9100_blank - Optional function. Blanks the display. 179 * @blank: the blank mode we want. 180 * @info: frame buffer structure that represents a single frame buffer 181 */ 182 static int 183 p9100_blank(int blank, struct fb_info *info) 184 { 185 struct p9100_par *par = (struct p9100_par *) info->par; 186 struct p9100_regs __iomem *regs = par->regs; 187 unsigned long flags; 188 u32 val; 189 190 spin_lock_irqsave(&par->lock, flags); 191 192 switch (blank) { 193 case FB_BLANK_UNBLANK: /* Unblanking */ 194 val = sbus_readl(®s->vid_screenpaint_timectl1); 195 val |= SCREENPAINT_TIMECTL1_ENABLE_VIDEO; 196 sbus_writel(val, ®s->vid_screenpaint_timectl1); 197 par->flags &= ~P9100_FLAG_BLANKED; 198 break; 199 200 case FB_BLANK_NORMAL: /* Normal blanking */ 201 case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */ 202 case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */ 203 case FB_BLANK_POWERDOWN: /* Poweroff */ 204 val = sbus_readl(®s->vid_screenpaint_timectl1); 205 val &= ~SCREENPAINT_TIMECTL1_ENABLE_VIDEO; 206 sbus_writel(val, ®s->vid_screenpaint_timectl1); 207 par->flags |= P9100_FLAG_BLANKED; 208 break; 209 } 210 211 spin_unlock_irqrestore(&par->lock, flags); 212 213 return 0; 214 } 215 216 static struct sbus_mmap_map p9100_mmap_map[] = { 217 { CG3_MMAP_OFFSET, 0, SBUS_MMAP_FBSIZE(1) }, 218 { 0, 0, 0 } 219 }; 220 221 static int p9100_mmap(struct fb_info *info, struct vm_area_struct *vma) 222 { 223 struct p9100_par *par = (struct p9100_par *)info->par; 224 225 return sbusfb_mmap_helper(p9100_mmap_map, 226 info->fix.smem_start, info->fix.smem_len, 227 par->which_io, vma); 228 } 229 230 static int p9100_ioctl(struct fb_info *info, unsigned int cmd, 231 unsigned long arg) 232 { 233 /* Make it look like a cg3. */ 234 return sbusfb_ioctl_helper(cmd, arg, info, 235 FBTYPE_SUN3COLOR, 8, info->fix.smem_len); 236 } 237 238 /* 239 * Initialisation 240 */ 241 242 static void p9100_init_fix(struct fb_info *info, int linebytes, struct device_node *dp) 243 { 244 snprintf(info->fix.id, sizeof(info->fix.id), "%pOFn", dp); 245 246 info->fix.type = FB_TYPE_PACKED_PIXELS; 247 info->fix.visual = FB_VISUAL_PSEUDOCOLOR; 248 249 info->fix.line_length = linebytes; 250 251 info->fix.accel = FB_ACCEL_SUN_CGTHREE; 252 } 253 254 static int p9100_probe(struct platform_device *op) 255 { 256 struct device_node *dp = op->dev.of_node; 257 struct fb_info *info; 258 struct p9100_par *par; 259 int linebytes, err; 260 261 info = framebuffer_alloc(sizeof(struct p9100_par), &op->dev); 262 263 err = -ENOMEM; 264 if (!info) 265 goto out_err; 266 par = info->par; 267 268 spin_lock_init(&par->lock); 269 270 /* This is the framebuffer and the only resource apps can mmap. */ 271 info->fix.smem_start = op->resource[2].start; 272 par->which_io = op->resource[2].flags & IORESOURCE_BITS; 273 274 sbusfb_fill_var(&info->var, dp, 8); 275 info->var.red.length = 8; 276 info->var.green.length = 8; 277 info->var.blue.length = 8; 278 279 linebytes = of_getintprop_default(dp, "linebytes", info->var.xres); 280 info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres); 281 282 par->regs = of_ioremap(&op->resource[0], 0, 283 sizeof(struct p9100_regs), "p9100 regs"); 284 if (!par->regs) 285 goto out_release_fb; 286 287 info->fbops = &p9100_ops; 288 info->screen_base = of_ioremap(&op->resource[2], 0, 289 info->fix.smem_len, "p9100 ram"); 290 if (!info->screen_base) 291 goto out_unmap_regs; 292 293 p9100_blank(FB_BLANK_UNBLANK, info); 294 295 if (fb_alloc_cmap(&info->cmap, 256, 0)) 296 goto out_unmap_screen; 297 298 p9100_init_fix(info, linebytes, dp); 299 300 err = register_framebuffer(info); 301 if (err < 0) 302 goto out_dealloc_cmap; 303 304 fb_set_cmap(&info->cmap, info); 305 306 dev_set_drvdata(&op->dev, info); 307 308 printk(KERN_INFO "%pOF: p9100 at %lx:%lx\n", 309 dp, 310 par->which_io, info->fix.smem_start); 311 312 return 0; 313 314 out_dealloc_cmap: 315 fb_dealloc_cmap(&info->cmap); 316 317 out_unmap_screen: 318 of_iounmap(&op->resource[2], info->screen_base, info->fix.smem_len); 319 320 out_unmap_regs: 321 of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs)); 322 323 out_release_fb: 324 framebuffer_release(info); 325 326 out_err: 327 return err; 328 } 329 330 static void p9100_remove(struct platform_device *op) 331 { 332 struct fb_info *info = dev_get_drvdata(&op->dev); 333 struct p9100_par *par = info->par; 334 335 unregister_framebuffer(info); 336 fb_dealloc_cmap(&info->cmap); 337 338 of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs)); 339 of_iounmap(&op->resource[2], info->screen_base, info->fix.smem_len); 340 341 framebuffer_release(info); 342 } 343 344 static const struct of_device_id p9100_match[] = { 345 { 346 .name = "p9100", 347 }, 348 {}, 349 }; 350 MODULE_DEVICE_TABLE(of, p9100_match); 351 352 static struct platform_driver p9100_driver = { 353 .driver = { 354 .name = "p9100", 355 .of_match_table = p9100_match, 356 }, 357 .probe = p9100_probe, 358 .remove_new = p9100_remove, 359 }; 360 361 static int __init p9100_init(void) 362 { 363 if (fb_get_options("p9100fb", NULL)) 364 return -ENODEV; 365 366 return platform_driver_register(&p9100_driver); 367 } 368 369 static void __exit p9100_exit(void) 370 { 371 platform_driver_unregister(&p9100_driver); 372 } 373 374 module_init(p9100_init); 375 module_exit(p9100_exit); 376 377 MODULE_DESCRIPTION("framebuffer driver for P9100 chipsets"); 378 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>"); 379 MODULE_VERSION("2.0"); 380 MODULE_LICENSE("GPL"); 381