Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * HP300 Topcat framebuffer support (derived from macfb of all things) |
| 3 | * Phil Blundell <philb@gnu.org> 1998 |
| 4 | * DIO-II, colour map and Catseye support by |
| 5 | * Kars de Jong <jongk@linux-m68k.org>, May 2004. |
| 6 | */ |
| 7 | |
| 8 | #include <linux/module.h> |
| 9 | #include <linux/kernel.h> |
| 10 | #include <linux/sched.h> |
| 11 | #include <linux/errno.h> |
| 12 | #include <linux/string.h> |
| 13 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/slab.h> |
| 15 | #include <linux/delay.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/fb.h> |
| 18 | #include <linux/dio.h> |
| 19 | |
| 20 | #include <asm/io.h> |
| 21 | #include <asm/uaccess.h> |
| 22 | |
| 23 | static struct fb_info fb_info = { |
| 24 | .fix = { |
| 25 | .id = "HP300 ", |
| 26 | .type = FB_TYPE_PACKED_PIXELS, |
| 27 | .visual = FB_VISUAL_PSEUDOCOLOR, |
| 28 | .accel = FB_ACCEL_NONE, |
| 29 | } |
| 30 | }; |
| 31 | |
| 32 | static unsigned long fb_regs; |
| 33 | static unsigned char fb_bitmask; |
| 34 | |
| 35 | #define TC_NBLANK 0x4080 |
| 36 | #define TC_WEN 0x4088 |
| 37 | #define TC_REN 0x408c |
| 38 | #define TC_FBEN 0x4090 |
| 39 | #define TC_PRR 0x40ea |
| 40 | |
| 41 | /* These defines match the X window system */ |
| 42 | #define RR_CLEAR 0x0 |
| 43 | #define RR_COPY 0x3 |
| 44 | #define RR_NOOP 0x5 |
| 45 | #define RR_XOR 0x6 |
| 46 | #define RR_INVERT 0xa |
| 47 | #define RR_COPYINVERTED 0xc |
| 48 | #define RR_SET 0xf |
| 49 | |
| 50 | /* blitter regs */ |
| 51 | #define BUSY 0x4044 |
| 52 | #define WMRR 0x40ef |
| 53 | #define SOURCE_X 0x40f2 |
| 54 | #define SOURCE_Y 0x40f6 |
| 55 | #define DEST_X 0x40fa |
| 56 | #define DEST_Y 0x40fe |
| 57 | #define WHEIGHT 0x4106 |
| 58 | #define WWIDTH 0x4102 |
| 59 | #define WMOVE 0x409c |
| 60 | |
| 61 | static struct fb_var_screeninfo hpfb_defined = { |
| 62 | .red = { |
| 63 | .length = 8, |
| 64 | }, |
| 65 | .green = { |
| 66 | .length = 8, |
| 67 | }, |
| 68 | .blue = { |
| 69 | .length = 8, |
| 70 | }, |
| 71 | .activate = FB_ACTIVATE_NOW, |
| 72 | .height = -1, |
| 73 | .width = -1, |
| 74 | .vmode = FB_VMODE_NONINTERLACED, |
| 75 | }; |
| 76 | |
| 77 | static int hpfb_setcolreg(unsigned regno, unsigned red, unsigned green, |
| 78 | unsigned blue, unsigned transp, |
| 79 | struct fb_info *info) |
| 80 | { |
| 81 | /* use MSBs */ |
| 82 | unsigned char _red =red>>8; |
| 83 | unsigned char _green=green>>8; |
| 84 | unsigned char _blue =blue>>8; |
| 85 | unsigned char _regno=regno; |
| 86 | |
| 87 | /* |
| 88 | * Set a single color register. The values supplied are |
| 89 | * already rounded down to the hardware's capabilities |
| 90 | * (according to the entries in the `var' structure). Return |
| 91 | * != 0 for invalid regno. |
| 92 | */ |
| 93 | |
| 94 | if (regno >= info->cmap.len) |
| 95 | return 1; |
| 96 | |
| 97 | while (in_be16(fb_regs + 0x6002) & 0x4) udelay(1); |
| 98 | |
| 99 | out_be16(fb_regs + 0x60ba, 0xff); |
| 100 | |
| 101 | out_be16(fb_regs + 0x60b2, _red); |
| 102 | out_be16(fb_regs + 0x60b4, _green); |
| 103 | out_be16(fb_regs + 0x60b6, _blue); |
| 104 | out_be16(fb_regs + 0x60b8, ~_regno); |
| 105 | out_be16(fb_regs + 0x60f0, 0xff); |
| 106 | |
| 107 | udelay(100); |
| 108 | |
| 109 | while (in_be16(fb_regs + 0x6002) & 0x4) udelay(1); |
| 110 | out_be16(fb_regs + 0x60b2, 0); |
| 111 | out_be16(fb_regs + 0x60b4, 0); |
| 112 | out_be16(fb_regs + 0x60b6, 0); |
| 113 | out_be16(fb_regs + 0x60b8, 0); |
| 114 | |
| 115 | return 0; |
| 116 | } |
| 117 | |
| 118 | /* 0 unblank, 1 blank, 2 no vsync, 3 no hsync, 4 off */ |
| 119 | |
| 120 | static int hpfb_blank(int blank, struct fb_info *info) |
| 121 | { |
| 122 | out_8(fb_regs + TC_NBLANK, (blank ? 0x00 : fb_bitmask)); |
| 123 | |
| 124 | return 0; |
| 125 | } |
| 126 | |
| 127 | static void topcat_blit(int x0, int y0, int x1, int y1, int w, int h, int rr) |
| 128 | { |
| 129 | if (rr >= 0) { |
| 130 | while (in_8(fb_regs + BUSY) & fb_bitmask) |
| 131 | ; |
| 132 | } |
| 133 | out_8(fb_regs + TC_FBEN, fb_bitmask); |
| 134 | if (rr >= 0) { |
| 135 | out_8(fb_regs + TC_WEN, fb_bitmask); |
| 136 | out_8(fb_regs + WMRR, rr); |
| 137 | } |
| 138 | out_be16(fb_regs + SOURCE_X, x0); |
| 139 | out_be16(fb_regs + SOURCE_Y, y0); |
| 140 | out_be16(fb_regs + DEST_X, x1); |
| 141 | out_be16(fb_regs + DEST_Y, y1); |
| 142 | out_be16(fb_regs + WWIDTH, w); |
| 143 | out_be16(fb_regs + WHEIGHT, h); |
| 144 | out_8(fb_regs + WMOVE, fb_bitmask); |
| 145 | } |
| 146 | |
| 147 | static void hpfb_copyarea(struct fb_info *info, const struct fb_copyarea *area) |
| 148 | { |
| 149 | topcat_blit(area->sx, area->sy, area->dx, area->dy, area->width, area->height, RR_COPY); |
| 150 | } |
| 151 | |
| 152 | static void hpfb_fillrect(struct fb_info *p, const struct fb_fillrect *region) |
| 153 | { |
| 154 | u8 clr; |
| 155 | |
| 156 | clr = region->color & 0xff; |
| 157 | |
| 158 | while (in_8(fb_regs + BUSY) & fb_bitmask) |
| 159 | ; |
| 160 | |
| 161 | /* Foreground */ |
| 162 | out_8(fb_regs + TC_WEN, fb_bitmask & clr); |
| 163 | out_8(fb_regs + WMRR, (region->rop == ROP_COPY ? RR_SET : RR_INVERT)); |
| 164 | |
| 165 | /* Background */ |
| 166 | out_8(fb_regs + TC_WEN, fb_bitmask & ~clr); |
| 167 | out_8(fb_regs + WMRR, (region->rop == ROP_COPY ? RR_CLEAR : RR_NOOP)); |
| 168 | |
| 169 | topcat_blit(region->dx, region->dy, region->dx, region->dy, region->width, region->height, -1); |
| 170 | } |
| 171 | |
| 172 | static int hpfb_sync(struct fb_info *info) |
| 173 | { |
| 174 | /* |
| 175 | * Since we also access the framebuffer directly, we have to wait |
| 176 | * until the block mover is finished |
| 177 | */ |
| 178 | while (in_8(fb_regs + BUSY) & fb_bitmask) |
| 179 | ; |
| 180 | |
| 181 | out_8(fb_regs + TC_WEN, fb_bitmask); |
| 182 | out_8(fb_regs + TC_PRR, RR_COPY); |
| 183 | out_8(fb_regs + TC_FBEN, fb_bitmask); |
| 184 | |
| 185 | return 0; |
| 186 | } |
| 187 | |
| 188 | static struct fb_ops hpfb_ops = { |
| 189 | .owner = THIS_MODULE, |
| 190 | .fb_setcolreg = hpfb_setcolreg, |
| 191 | .fb_blank = hpfb_blank, |
| 192 | .fb_fillrect = hpfb_fillrect, |
| 193 | .fb_copyarea = hpfb_copyarea, |
| 194 | .fb_imageblit = cfb_imageblit, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | .fb_sync = hpfb_sync, |
| 196 | }; |
| 197 | |
| 198 | /* Common to all HP framebuffers */ |
| 199 | #define HPFB_FBWMSB 0x05 /* Frame buffer width */ |
| 200 | #define HPFB_FBWLSB 0x07 |
| 201 | #define HPFB_FBHMSB 0x09 /* Frame buffer height */ |
| 202 | #define HPFB_FBHLSB 0x0b |
| 203 | #define HPFB_DWMSB 0x0d /* Display width */ |
| 204 | #define HPFB_DWLSB 0x0f |
| 205 | #define HPFB_DHMSB 0x11 /* Display height */ |
| 206 | #define HPFB_DHLSB 0x13 |
| 207 | #define HPFB_NUMPLANES 0x5b /* Number of colour planes */ |
| 208 | #define HPFB_FBOMSB 0x5d /* Frame buffer offset */ |
| 209 | #define HPFB_FBOLSB 0x5f |
| 210 | |
| 211 | static int __init hpfb_init_one(unsigned long phys_base, unsigned long virt_base) |
| 212 | { |
| 213 | unsigned long fboff, fb_width, fb_height, fb_start; |
| 214 | |
| 215 | fb_regs = virt_base; |
| 216 | fboff = (in_8(fb_regs + HPFB_FBOMSB) << 8) | in_8(fb_regs + HPFB_FBOLSB); |
| 217 | |
| 218 | fb_info.fix.smem_start = (in_8(fb_regs + fboff) << 16); |
| 219 | |
| 220 | if (phys_base >= DIOII_BASE) { |
| 221 | fb_info.fix.smem_start += phys_base; |
| 222 | } |
| 223 | |
| 224 | if (DIO_SECID(fb_regs) != DIO_ID2_TOPCAT) { |
| 225 | /* This is the magic incantation the HP X server uses to make Catseye boards work. */ |
| 226 | while (in_be16(fb_regs+0x4800) & 1) |
| 227 | ; |
| 228 | out_be16(fb_regs+0x4800, 0); /* Catseye status */ |
| 229 | out_be16(fb_regs+0x4510, 0); /* VB */ |
| 230 | out_be16(fb_regs+0x4512, 0); /* TCNTRL */ |
| 231 | out_be16(fb_regs+0x4514, 0); /* ACNTRL */ |
| 232 | out_be16(fb_regs+0x4516, 0); /* PNCNTRL */ |
| 233 | out_be16(fb_regs+0x4206, 0x90); /* RUG Command/Status */ |
| 234 | out_be16(fb_regs+0x60a2, 0); /* Overlay Mask */ |
| 235 | out_be16(fb_regs+0x60bc, 0); /* Ram Select */ |
| 236 | } |
| 237 | |
| 238 | /* |
| 239 | * Fill in the available video resolution |
| 240 | */ |
| 241 | fb_width = (in_8(fb_regs + HPFB_FBWMSB) << 8) | in_8(fb_regs + HPFB_FBWLSB); |
| 242 | fb_info.fix.line_length = fb_width; |
| 243 | fb_height = (in_8(fb_regs + HPFB_FBHMSB) << 8) | in_8(fb_regs + HPFB_FBHLSB); |
| 244 | fb_info.fix.smem_len = fb_width * fb_height; |
| 245 | fb_start = (unsigned long)ioremap_writethrough(fb_info.fix.smem_start, |
| 246 | fb_info.fix.smem_len); |
| 247 | hpfb_defined.xres = (in_8(fb_regs + HPFB_DWMSB) << 8) | in_8(fb_regs + HPFB_DWLSB); |
| 248 | hpfb_defined.yres = (in_8(fb_regs + HPFB_DHMSB) << 8) | in_8(fb_regs + HPFB_DHLSB); |
| 249 | hpfb_defined.xres_virtual = hpfb_defined.xres; |
| 250 | hpfb_defined.yres_virtual = hpfb_defined.yres; |
| 251 | hpfb_defined.bits_per_pixel = in_8(fb_regs + HPFB_NUMPLANES); |
| 252 | |
| 253 | printk(KERN_INFO "hpfb: framebuffer at 0x%lx, mapped to 0x%lx, size %dk\n", |
| 254 | fb_info.fix.smem_start, fb_start, fb_info.fix.smem_len/1024); |
| 255 | printk(KERN_INFO "hpfb: mode is %dx%dx%d, linelength=%d\n", |
| 256 | hpfb_defined.xres, hpfb_defined.yres, hpfb_defined.bits_per_pixel, fb_info.fix.line_length); |
| 257 | |
| 258 | /* |
| 259 | * Give the hardware a bit of a prod and work out how many bits per |
| 260 | * pixel are supported. |
| 261 | */ |
| 262 | out_8(fb_regs + TC_WEN, 0xff); |
| 263 | out_8(fb_regs + TC_PRR, RR_COPY); |
| 264 | out_8(fb_regs + TC_FBEN, 0xff); |
| 265 | out_8(fb_start, 0xff); |
| 266 | fb_bitmask = in_8(fb_start); |
| 267 | out_8(fb_start, 0); |
| 268 | |
| 269 | /* |
| 270 | * Enable reading/writing of all the planes. |
| 271 | */ |
| 272 | out_8(fb_regs + TC_WEN, fb_bitmask); |
| 273 | out_8(fb_regs + TC_PRR, RR_COPY); |
| 274 | out_8(fb_regs + TC_REN, fb_bitmask); |
| 275 | out_8(fb_regs + TC_FBEN, fb_bitmask); |
| 276 | |
| 277 | /* |
| 278 | * Clear the screen. |
| 279 | */ |
| 280 | topcat_blit(0, 0, 0, 0, fb_width, fb_height, RR_CLEAR); |
| 281 | |
| 282 | /* |
| 283 | * Let there be consoles.. |
| 284 | */ |
| 285 | if (DIO_SECID(fb_regs) == DIO_ID2_TOPCAT) |
| 286 | strcat(fb_info.fix.id, "Topcat"); |
| 287 | else |
| 288 | strcat(fb_info.fix.id, "Catseye"); |
| 289 | fb_info.fbops = &hpfb_ops; |
| 290 | fb_info.flags = FBINFO_DEFAULT; |
| 291 | fb_info.var = hpfb_defined; |
| 292 | fb_info.screen_base = (char *)fb_start; |
| 293 | |
| 294 | fb_alloc_cmap(&fb_info.cmap, 1 << hpfb_defined.bits_per_pixel, 0); |
| 295 | |
| 296 | if (register_framebuffer(&fb_info) < 0) { |
| 297 | fb_dealloc_cmap(&fb_info.cmap); |
Amol Lad | 1bedb0b | 2006-12-08 02:40:10 -0800 | [diff] [blame^] | 298 | iounmap(fb_info.screen_base); |
| 299 | fb_info.screen_base = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | return 1; |
| 301 | } |
| 302 | |
| 303 | printk(KERN_INFO "fb%d: %s frame buffer device\n", |
| 304 | fb_info.node, fb_info.fix.id); |
| 305 | |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | /* |
| 310 | * Check that the secondary ID indicates that we have some hope of working with this |
| 311 | * framebuffer. The catseye boards are pretty much like topcats and we can muddle through. |
| 312 | */ |
| 313 | |
| 314 | #define topcat_sid_ok(x) (((x) == DIO_ID2_LRCATSEYE) || ((x) == DIO_ID2_HRCCATSEYE) \ |
| 315 | || ((x) == DIO_ID2_HRMCATSEYE) || ((x) == DIO_ID2_TOPCAT)) |
| 316 | |
| 317 | /* |
| 318 | * Initialise the framebuffer |
| 319 | */ |
| 320 | static int __devinit hpfb_dio_probe(struct dio_dev * d, const struct dio_device_id * ent) |
| 321 | { |
| 322 | unsigned long paddr, vaddr; |
| 323 | |
| 324 | paddr = d->resource.start; |
| 325 | if (!request_mem_region(d->resource.start, d->resource.end - d->resource.start, d->name)) |
| 326 | return -EBUSY; |
| 327 | |
| 328 | if (d->scode >= DIOII_SCBASE) { |
| 329 | vaddr = (unsigned long)ioremap(paddr, d->resource.end - d->resource.start); |
| 330 | } else { |
| 331 | vaddr = paddr + DIO_VIRADDRBASE; |
| 332 | } |
| 333 | printk(KERN_INFO "Topcat found at DIO select code %d " |
| 334 | "(secondary id %02x)\n", d->scode, (d->id >> 8) & 0xff); |
| 335 | if (hpfb_init_one(paddr, vaddr)) { |
| 336 | if (d->scode >= DIOII_SCBASE) |
| 337 | iounmap((void *)vaddr); |
| 338 | return -ENOMEM; |
| 339 | } |
| 340 | return 0; |
| 341 | } |
| 342 | |
| 343 | static void __devexit hpfb_remove_one(struct dio_dev *d) |
| 344 | { |
| 345 | unregister_framebuffer(&fb_info); |
| 346 | if (d->scode >= DIOII_SCBASE) |
| 347 | iounmap((void *)fb_regs); |
| 348 | release_mem_region(d->resource.start, d->resource.end - d->resource.start); |
| 349 | } |
| 350 | |
| 351 | static struct dio_device_id hpfb_dio_tbl[] = { |
| 352 | { DIO_ENCODE_ID(DIO_ID_FBUFFER, DIO_ID2_LRCATSEYE) }, |
| 353 | { DIO_ENCODE_ID(DIO_ID_FBUFFER, DIO_ID2_HRCCATSEYE) }, |
| 354 | { DIO_ENCODE_ID(DIO_ID_FBUFFER, DIO_ID2_HRMCATSEYE) }, |
| 355 | { DIO_ENCODE_ID(DIO_ID_FBUFFER, DIO_ID2_TOPCAT) }, |
| 356 | { 0 } |
| 357 | }; |
| 358 | |
| 359 | static struct dio_driver hpfb_driver = { |
| 360 | .name = "hpfb", |
| 361 | .id_table = hpfb_dio_tbl, |
| 362 | .probe = hpfb_dio_probe, |
| 363 | .remove = __devexit_p(hpfb_remove_one), |
| 364 | }; |
| 365 | |
| 366 | int __init hpfb_init(void) |
| 367 | { |
| 368 | unsigned int sid; |
| 369 | mm_segment_t fs; |
| 370 | unsigned char i; |
| 371 | int err; |
| 372 | |
| 373 | /* Topcats can be on the internal IO bus or real DIO devices. |
| 374 | * The internal variant sits at 0x560000; it has primary |
| 375 | * and secondary ID registers just like the DIO version. |
| 376 | * So we merge the two detection routines. |
| 377 | * |
| 378 | * Perhaps this #define should be in a global header file: |
| 379 | * I believe it's common to all internal fbs, not just topcat. |
| 380 | */ |
| 381 | #define INTFBVADDR 0xf0560000 |
| 382 | #define INTFBPADDR 0x560000 |
| 383 | |
| 384 | if (!MACH_IS_HP300) |
| 385 | return -ENXIO; |
| 386 | |
| 387 | if (fb_get_options("hpfb", NULL)) |
| 388 | return -ENODEV; |
| 389 | |
Bjorn Helgaas | e51c01b | 2006-03-25 03:07:17 -0800 | [diff] [blame] | 390 | err = dio_register_driver(&hpfb_driver); |
| 391 | if (err) |
| 392 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | |
| 394 | fs = get_fs(); |
| 395 | set_fs(KERNEL_DS); |
| 396 | err = get_user(i, (unsigned char *)INTFBVADDR + DIO_IDOFF); |
| 397 | set_fs(fs); |
| 398 | |
| 399 | if (!err && (i == DIO_ID_FBUFFER) && topcat_sid_ok(sid = DIO_SECID(INTFBVADDR))) { |
| 400 | if (!request_mem_region(INTFBPADDR, DIO_DEVSIZE, "Internal Topcat")) |
| 401 | return -EBUSY; |
| 402 | printk(KERN_INFO "Internal Topcat found (secondary id %02x)\n", sid); |
| 403 | if (hpfb_init_one(INTFBPADDR, INTFBVADDR)) { |
| 404 | return -ENOMEM; |
| 405 | } |
| 406 | } |
| 407 | return 0; |
| 408 | } |
| 409 | |
| 410 | void __exit hpfb_cleanup_module(void) |
| 411 | { |
| 412 | dio_unregister_driver(&hpfb_driver); |
| 413 | } |
| 414 | |
| 415 | module_init(hpfb_init); |
| 416 | module_exit(hpfb_cleanup_module); |
| 417 | |
| 418 | MODULE_LICENSE("GPL"); |