Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * controlfb.c -- frame buffer device for the PowerMac 'control' display |
| 3 | * |
| 4 | * Created 12 July 1998 by Dan Jacobowitz <dan@debian.org> |
| 5 | * Copyright (C) 1998 Dan Jacobowitz |
| 6 | * Copyright (C) 2001 Takashi Oe |
| 7 | * |
| 8 | * Mmap code by Michel Lanners <mlan@cpu.lu> |
| 9 | * |
| 10 | * Frame buffer structure from: |
| 11 | * drivers/video/chipsfb.c -- frame buffer device for |
| 12 | * Chips & Technologies 65550 chip. |
| 13 | * |
| 14 | * Copyright (C) 1998 Paul Mackerras |
| 15 | * |
| 16 | * This file is derived from the Powermac "chips" driver: |
| 17 | * Copyright (C) 1997 Fabio Riccardi. |
| 18 | * And from the frame buffer device for Open Firmware-initialized devices: |
| 19 | * Copyright (C) 1997 Geert Uytterhoeven. |
| 20 | * |
| 21 | * Hardware information from: |
| 22 | * control.c: Console support for PowerMac "control" display adaptor. |
| 23 | * Copyright (C) 1996 Paul Mackerras |
| 24 | * |
| 25 | * Updated to 2.5 framebuffer API by Ben Herrenschmidt |
| 26 | * <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>, |
| 27 | * and James Simmons <jsimmons@infradead.org>. |
| 28 | * |
| 29 | * This file is subject to the terms and conditions of the GNU General Public |
| 30 | * License. See the file COPYING in the main directory of this archive for |
| 31 | * more details. |
| 32 | */ |
| 33 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <linux/module.h> |
| 35 | #include <linux/kernel.h> |
| 36 | #include <linux/errno.h> |
| 37 | #include <linux/string.h> |
| 38 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <linux/slab.h> |
| 40 | #include <linux/vmalloc.h> |
| 41 | #include <linux/delay.h> |
| 42 | #include <linux/interrupt.h> |
Grant Likely | 22ae782 | 2010-07-29 11:49:01 -0600 | [diff] [blame] | 43 | #include <linux/of.h> |
| 44 | #include <linux/of_address.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <linux/fb.h> |
| 46 | #include <linux/init.h> |
| 47 | #include <linux/pci.h> |
| 48 | #include <linux/nvram.h> |
| 49 | #include <linux/adb.h> |
| 50 | #include <linux/cuda.h> |
| 51 | #include <asm/io.h> |
| 52 | #include <asm/prom.h> |
| 53 | #include <asm/pgtable.h> |
| 54 | #include <asm/btext.h> |
| 55 | |
| 56 | #include "macmodes.h" |
| 57 | #include "controlfb.h" |
| 58 | |
| 59 | struct fb_par_control { |
| 60 | int vmode, cmode; |
| 61 | int xres, yres; |
| 62 | int vxres, vyres; |
| 63 | int xoffset, yoffset; |
| 64 | int pitch; |
| 65 | struct control_regvals regvals; |
| 66 | unsigned long sync; |
| 67 | unsigned char ctrl; |
| 68 | }; |
| 69 | |
| 70 | #define DIRTY(z) ((x)->z != (y)->z) |
| 71 | #define DIRTY_CMAP(z) (memcmp(&((x)->z), &((y)->z), sizeof((y)->z))) |
| 72 | static inline int PAR_EQUAL(struct fb_par_control *x, struct fb_par_control *y) |
| 73 | { |
| 74 | int i, results; |
| 75 | |
| 76 | results = 1; |
| 77 | for (i = 0; i < 3; i++) |
| 78 | results &= !DIRTY(regvals.clock_params[i]); |
| 79 | if (!results) |
| 80 | return 0; |
| 81 | for (i = 0; i < 16; i++) |
| 82 | results &= !DIRTY(regvals.regs[i]); |
| 83 | if (!results) |
| 84 | return 0; |
| 85 | return (!DIRTY(cmode) && !DIRTY(xres) && !DIRTY(yres) |
| 86 | && !DIRTY(vxres) && !DIRTY(vyres)); |
| 87 | } |
| 88 | static inline int VAR_MATCH(struct fb_var_screeninfo *x, struct fb_var_screeninfo *y) |
| 89 | { |
| 90 | return (!DIRTY(bits_per_pixel) && !DIRTY(xres) |
| 91 | && !DIRTY(yres) && !DIRTY(xres_virtual) |
| 92 | && !DIRTY(yres_virtual) |
| 93 | && !DIRTY_CMAP(red) && !DIRTY_CMAP(green) && !DIRTY_CMAP(blue)); |
| 94 | } |
| 95 | |
| 96 | struct fb_info_control { |
| 97 | struct fb_info info; |
| 98 | struct fb_par_control par; |
Antonino A. Daplas | 11494543 | 2007-07-17 04:05:35 -0700 | [diff] [blame] | 99 | u32 pseudo_palette[16]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
| 101 | struct cmap_regs __iomem *cmap_regs; |
| 102 | unsigned long cmap_regs_phys; |
| 103 | |
| 104 | struct control_regs __iomem *control_regs; |
| 105 | unsigned long control_regs_phys; |
| 106 | unsigned long control_regs_size; |
| 107 | |
| 108 | __u8 __iomem *frame_buffer; |
| 109 | unsigned long frame_buffer_phys; |
| 110 | unsigned long fb_orig_base; |
| 111 | unsigned long fb_orig_size; |
| 112 | |
| 113 | int control_use_bank2; |
| 114 | unsigned long total_vram; |
| 115 | unsigned char vram_attr; |
| 116 | }; |
| 117 | |
| 118 | /* control register access macro */ |
| 119 | #define CNTRL_REG(INFO,REG) (&(((INFO)->control_regs->REG).r)) |
| 120 | |
| 121 | |
| 122 | /******************** Prototypes for exported functions ********************/ |
| 123 | /* |
| 124 | * struct fb_ops |
| 125 | */ |
| 126 | static int controlfb_pan_display(struct fb_var_screeninfo *var, |
| 127 | struct fb_info *info); |
| 128 | static int controlfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, |
| 129 | u_int transp, struct fb_info *info); |
| 130 | static int controlfb_blank(int blank_mode, struct fb_info *info); |
Christoph Hellwig | 216d526 | 2006-01-14 13:21:25 -0800 | [diff] [blame] | 131 | static int controlfb_mmap(struct fb_info *info, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | struct vm_area_struct *vma); |
| 133 | static int controlfb_set_par (struct fb_info *info); |
| 134 | static int controlfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info); |
| 135 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | /******************** Prototypes for internal functions **********************/ |
| 137 | |
| 138 | static void set_control_clock(unsigned char *params); |
| 139 | static int init_control(struct fb_info_control *p); |
| 140 | static void control_set_hardware(struct fb_info_control *p, |
| 141 | struct fb_par_control *par); |
| 142 | static int control_of_init(struct device_node *dp); |
| 143 | static void find_vram_size(struct fb_info_control *p); |
| 144 | static int read_control_sense(struct fb_info_control *p); |
| 145 | static int calc_clock_params(unsigned long clk, unsigned char *param); |
| 146 | static int control_var_to_par(struct fb_var_screeninfo *var, |
| 147 | struct fb_par_control *par, const struct fb_info *fb_info); |
| 148 | static inline void control_par_to_var(struct fb_par_control *par, |
| 149 | struct fb_var_screeninfo *var); |
| 150 | static void control_init_info(struct fb_info *info, struct fb_info_control *p); |
| 151 | static void control_cleanup(void); |
| 152 | |
| 153 | |
| 154 | /************************** Internal variables *******************************/ |
| 155 | |
| 156 | static struct fb_info_control *control_fb; |
| 157 | |
| 158 | static int default_vmode __initdata = VMODE_NVRAM; |
| 159 | static int default_cmode __initdata = CMODE_NVRAM; |
| 160 | |
| 161 | |
| 162 | static struct fb_ops controlfb_ops = { |
| 163 | .owner = THIS_MODULE, |
| 164 | .fb_check_var = controlfb_check_var, |
| 165 | .fb_set_par = controlfb_set_par, |
| 166 | .fb_setcolreg = controlfb_setcolreg, |
| 167 | .fb_pan_display = controlfb_pan_display, |
| 168 | .fb_blank = controlfb_blank, |
| 169 | .fb_mmap = controlfb_mmap, |
| 170 | .fb_fillrect = cfb_fillrect, |
| 171 | .fb_copyarea = cfb_copyarea, |
| 172 | .fb_imageblit = cfb_imageblit, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | }; |
| 174 | |
| 175 | |
| 176 | /******************** The functions for controlfb_ops ********************/ |
| 177 | |
| 178 | #ifdef MODULE |
| 179 | MODULE_LICENSE("GPL"); |
| 180 | |
| 181 | int init_module(void) |
| 182 | { |
| 183 | struct device_node *dp; |
Stephen Rothwell | 30686ba | 2007-04-24 13:53:04 +1000 | [diff] [blame] | 184 | int ret = -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | |
Stephen Rothwell | 30686ba | 2007-04-24 13:53:04 +1000 | [diff] [blame] | 186 | dp = of_find_node_by_name(NULL, "control"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | if (dp != 0 && !control_of_init(dp)) |
Stephen Rothwell | 30686ba | 2007-04-24 13:53:04 +1000 | [diff] [blame] | 188 | ret = 0; |
| 189 | of_node_put(dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | |
Stephen Rothwell | 30686ba | 2007-04-24 13:53:04 +1000 | [diff] [blame] | 191 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | void cleanup_module(void) |
| 195 | { |
| 196 | control_cleanup(); |
| 197 | } |
| 198 | #endif |
| 199 | |
| 200 | /* |
| 201 | * Checks a var structure |
| 202 | */ |
| 203 | static int controlfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info) |
| 204 | { |
| 205 | struct fb_par_control par; |
| 206 | int err; |
| 207 | |
| 208 | err = control_var_to_par(var, &par, info); |
| 209 | if (err) |
| 210 | return err; |
| 211 | control_par_to_var(&par, var); |
| 212 | |
| 213 | return 0; |
| 214 | } |
| 215 | |
| 216 | /* |
| 217 | * Applies current var to display |
| 218 | */ |
| 219 | static int controlfb_set_par (struct fb_info *info) |
| 220 | { |
| 221 | struct fb_info_control *p = (struct fb_info_control *) info; |
| 222 | struct fb_par_control par; |
| 223 | int err; |
| 224 | |
| 225 | if((err = control_var_to_par(&info->var, &par, info))) { |
| 226 | printk (KERN_ERR "controlfb_set_par: error calling" |
| 227 | " control_var_to_par: %d.\n", err); |
| 228 | return err; |
| 229 | } |
| 230 | |
| 231 | control_set_hardware(p, &par); |
| 232 | |
| 233 | info->fix.visual = (p->par.cmode == CMODE_8) ? |
| 234 | FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR; |
| 235 | info->fix.line_length = p->par.pitch; |
| 236 | info->fix.xpanstep = 32 >> p->par.cmode; |
| 237 | info->fix.ypanstep = 1; |
| 238 | |
| 239 | return 0; |
| 240 | } |
| 241 | |
| 242 | /* |
| 243 | * Set screen start address according to var offset values |
| 244 | */ |
| 245 | static inline void set_screen_start(int xoffset, int yoffset, |
| 246 | struct fb_info_control *p) |
| 247 | { |
| 248 | struct fb_par_control *par = &p->par; |
| 249 | |
| 250 | par->xoffset = xoffset; |
| 251 | par->yoffset = yoffset; |
| 252 | out_le32(CNTRL_REG(p,start_addr), |
| 253 | par->yoffset * par->pitch + (par->xoffset << par->cmode)); |
| 254 | } |
| 255 | |
| 256 | |
| 257 | static int controlfb_pan_display(struct fb_var_screeninfo *var, |
| 258 | struct fb_info *info) |
| 259 | { |
| 260 | unsigned int xoffset, hstep; |
| 261 | struct fb_info_control *p = (struct fb_info_control *)info; |
| 262 | struct fb_par_control *par = &p->par; |
| 263 | |
| 264 | /* |
| 265 | * make sure start addr will be 32-byte aligned |
| 266 | */ |
| 267 | hstep = 0x1f >> par->cmode; |
| 268 | xoffset = (var->xoffset + hstep) & ~hstep; |
| 269 | |
| 270 | if (xoffset+par->xres > par->vxres || |
| 271 | var->yoffset+par->yres > par->vyres) |
| 272 | return -EINVAL; |
| 273 | |
| 274 | set_screen_start(xoffset, var->yoffset, p); |
| 275 | |
| 276 | return 0; |
| 277 | } |
| 278 | |
| 279 | |
| 280 | /* |
| 281 | * Private mmap since we want to have a different caching on the framebuffer |
| 282 | * for controlfb. |
| 283 | * Note there's no locking in here; it's done in fb_mmap() in fbmem.c. |
| 284 | */ |
Christoph Hellwig | 216d526 | 2006-01-14 13:21:25 -0800 | [diff] [blame] | 285 | static int controlfb_mmap(struct fb_info *info, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | struct vm_area_struct *vma) |
| 287 | { |
| 288 | unsigned long off, start; |
| 289 | u32 len; |
| 290 | |
| 291 | off = vma->vm_pgoff << PAGE_SHIFT; |
| 292 | |
| 293 | /* frame buffer memory */ |
| 294 | start = info->fix.smem_start; |
| 295 | len = PAGE_ALIGN((start & ~PAGE_MASK)+info->fix.smem_len); |
| 296 | if (off >= len) { |
| 297 | /* memory mapped io */ |
| 298 | off -= len; |
| 299 | if (info->var.accel_flags) |
| 300 | return -EINVAL; |
| 301 | start = info->fix.mmio_start; |
| 302 | len = PAGE_ALIGN((start & ~PAGE_MASK)+info->fix.mmio_len); |
Benjamin Herrenschmidt | 64b3d0e | 2008-12-18 19:13:51 +0000 | [diff] [blame] | 303 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | } else { |
| 305 | /* framebuffer */ |
Benjamin Herrenschmidt | 64b3d0e | 2008-12-18 19:13:51 +0000 | [diff] [blame] | 306 | vma->vm_page_prot = pgprot_cached_wthru(vma->vm_page_prot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | } |
| 308 | start &= PAGE_MASK; |
| 309 | if ((vma->vm_end - vma->vm_start + off) > len) |
| 310 | return -EINVAL; |
| 311 | off += start; |
| 312 | vma->vm_pgoff = off >> PAGE_SHIFT; |
| 313 | if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, |
| 314 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) |
| 315 | return -EAGAIN; |
| 316 | |
| 317 | return 0; |
| 318 | } |
| 319 | |
| 320 | static int controlfb_blank(int blank_mode, struct fb_info *info) |
| 321 | { |
| 322 | struct fb_info_control *p = (struct fb_info_control *) info; |
| 323 | unsigned ctrl; |
| 324 | |
| 325 | ctrl = ld_le32(CNTRL_REG(p,ctrl)); |
| 326 | if (blank_mode > 0) |
| 327 | switch (blank_mode) { |
| 328 | case FB_BLANK_VSYNC_SUSPEND: |
| 329 | ctrl &= ~3; |
| 330 | break; |
| 331 | case FB_BLANK_HSYNC_SUSPEND: |
| 332 | ctrl &= ~0x30; |
| 333 | break; |
| 334 | case FB_BLANK_POWERDOWN: |
| 335 | ctrl &= ~0x33; |
| 336 | /* fall through */ |
| 337 | case FB_BLANK_NORMAL: |
| 338 | ctrl |= 0x400; |
| 339 | break; |
| 340 | default: |
| 341 | break; |
| 342 | } |
| 343 | else { |
| 344 | ctrl &= ~0x400; |
| 345 | ctrl |= 0x33; |
| 346 | } |
| 347 | out_le32(CNTRL_REG(p,ctrl), ctrl); |
| 348 | |
| 349 | return 0; |
| 350 | } |
| 351 | |
| 352 | static int controlfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, |
| 353 | u_int transp, struct fb_info *info) |
| 354 | { |
| 355 | struct fb_info_control *p = (struct fb_info_control *) info; |
| 356 | __u8 r, g, b; |
| 357 | |
| 358 | if (regno > 255) |
| 359 | return 1; |
| 360 | |
| 361 | r = red >> 8; |
| 362 | g = green >> 8; |
| 363 | b = blue >> 8; |
| 364 | |
| 365 | out_8(&p->cmap_regs->addr, regno); /* tell clut what addr to fill */ |
| 366 | out_8(&p->cmap_regs->lut, r); /* send one color channel at */ |
| 367 | out_8(&p->cmap_regs->lut, g); /* a time... */ |
| 368 | out_8(&p->cmap_regs->lut, b); |
| 369 | |
| 370 | if (regno < 16) { |
| 371 | int i; |
| 372 | switch (p->par.cmode) { |
| 373 | case CMODE_16: |
| 374 | p->pseudo_palette[regno] = |
| 375 | (regno << 10) | (regno << 5) | regno; |
| 376 | break; |
| 377 | case CMODE_32: |
| 378 | i = (regno << 8) | regno; |
| 379 | p->pseudo_palette[regno] = (i << 16) | i; |
| 380 | break; |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | return 0; |
| 385 | } |
| 386 | |
| 387 | |
| 388 | /******************** End of controlfb_ops implementation ******************/ |
| 389 | |
| 390 | |
| 391 | |
| 392 | static void set_control_clock(unsigned char *params) |
| 393 | { |
| 394 | #ifdef CONFIG_ADB_CUDA |
| 395 | struct adb_request req; |
| 396 | int i; |
| 397 | |
| 398 | for (i = 0; i < 3; ++i) { |
| 399 | cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_GET_SET_IIC, |
| 400 | 0x50, i + 1, params[i]); |
| 401 | while (!req.complete) |
| 402 | cuda_poll(); |
| 403 | } |
| 404 | #endif |
| 405 | } |
| 406 | |
| 407 | |
| 408 | /* |
| 409 | * finish off the driver initialization and register |
| 410 | */ |
| 411 | static int __init init_control(struct fb_info_control *p) |
| 412 | { |
| 413 | int full, sense, vmode, cmode, vyres; |
| 414 | struct fb_var_screeninfo var; |
| 415 | int rc; |
| 416 | |
| 417 | printk(KERN_INFO "controlfb: "); |
| 418 | |
| 419 | full = p->total_vram == 0x400000; |
| 420 | |
| 421 | /* Try to pick a video mode out of NVRAM if we have one. */ |
Ben Collins | 4938d3f | 2006-10-18 08:49:31 -0400 | [diff] [blame] | 422 | #ifdef CONFIG_NVRAM |
Zac Storer | 5345010 | 2011-11-17 21:34:56 -0700 | [diff] [blame] | 423 | if (default_cmode == CMODE_NVRAM) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | cmode = nvram_read_byte(NV_CMODE); |
| 425 | if(cmode < CMODE_8 || cmode > CMODE_32) |
| 426 | cmode = CMODE_8; |
| 427 | } else |
Ben Collins | 4938d3f | 2006-10-18 08:49:31 -0400 | [diff] [blame] | 428 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | cmode=default_cmode; |
Ben Collins | 4938d3f | 2006-10-18 08:49:31 -0400 | [diff] [blame] | 430 | #ifdef CONFIG_NVRAM |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | if (default_vmode == VMODE_NVRAM) { |
| 432 | vmode = nvram_read_byte(NV_VMODE); |
| 433 | if (vmode < 1 || vmode > VMODE_MAX || |
| 434 | control_mac_modes[vmode - 1].m[full] < cmode) { |
| 435 | sense = read_control_sense(p); |
| 436 | printk("Monitor sense value = 0x%x, ", sense); |
| 437 | vmode = mac_map_monitor_sense(sense); |
| 438 | if (control_mac_modes[vmode - 1].m[full] < cmode) |
| 439 | vmode = VMODE_640_480_60; |
| 440 | } |
Ben Collins | 4938d3f | 2006-10-18 08:49:31 -0400 | [diff] [blame] | 441 | } else |
| 442 | #endif |
| 443 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | vmode=default_vmode; |
| 445 | if (control_mac_modes[vmode - 1].m[full] < cmode) { |
| 446 | if (cmode > CMODE_8) |
| 447 | cmode--; |
| 448 | else |
| 449 | vmode = VMODE_640_480_60; |
| 450 | } |
| 451 | } |
| 452 | |
| 453 | /* Initialize info structure */ |
| 454 | control_init_info(&p->info, p); |
| 455 | |
| 456 | /* Setup default var */ |
| 457 | if (mac_vmode_to_var(vmode, cmode, &var) < 0) { |
| 458 | /* This shouldn't happen! */ |
| 459 | printk("mac_vmode_to_var(%d, %d,) failed\n", vmode, cmode); |
| 460 | try_again: |
| 461 | vmode = VMODE_640_480_60; |
| 462 | cmode = CMODE_8; |
| 463 | if (mac_vmode_to_var(vmode, cmode, &var) < 0) { |
| 464 | printk(KERN_ERR "controlfb: mac_vmode_to_var() failed\n"); |
| 465 | return -ENXIO; |
| 466 | } |
| 467 | printk(KERN_INFO "controlfb: "); |
| 468 | } |
| 469 | printk("using video mode %d and color mode %d.\n", vmode, cmode); |
| 470 | |
| 471 | vyres = (p->total_vram - CTRLFB_OFF) / (var.xres << cmode); |
| 472 | if (vyres > var.yres) |
| 473 | var.yres_virtual = vyres; |
| 474 | |
| 475 | /* Apply default var */ |
| 476 | var.activate = FB_ACTIVATE_NOW; |
| 477 | rc = fb_set_var(&p->info, &var); |
| 478 | if (rc && (vmode != VMODE_640_480_60 || cmode != CMODE_8)) |
| 479 | goto try_again; |
| 480 | |
| 481 | /* Register with fbdev layer */ |
| 482 | if (register_framebuffer(&p->info) < 0) |
| 483 | return -ENXIO; |
| 484 | |
| 485 | printk(KERN_INFO "fb%d: control display adapter\n", p->info.node); |
| 486 | |
| 487 | return 0; |
| 488 | } |
| 489 | |
| 490 | #define RADACAL_WRITE(a,d) \ |
| 491 | out_8(&p->cmap_regs->addr, (a)); \ |
| 492 | out_8(&p->cmap_regs->dat, (d)) |
| 493 | |
| 494 | /* Now how about actually saying, Make it so! */ |
| 495 | /* Some things in here probably don't need to be done each time. */ |
| 496 | static void control_set_hardware(struct fb_info_control *p, struct fb_par_control *par) |
| 497 | { |
| 498 | struct control_regvals *r; |
| 499 | volatile struct preg __iomem *rp; |
| 500 | int i, cmode; |
| 501 | |
| 502 | if (PAR_EQUAL(&p->par, par)) { |
| 503 | /* |
| 504 | * check if only xoffset or yoffset differs. |
| 505 | * this prevents flickers in typical VT switch case. |
| 506 | */ |
| 507 | if (p->par.xoffset != par->xoffset || |
| 508 | p->par.yoffset != par->yoffset) |
| 509 | set_screen_start(par->xoffset, par->yoffset, p); |
| 510 | |
| 511 | return; |
| 512 | } |
| 513 | |
| 514 | p->par = *par; |
| 515 | cmode = p->par.cmode; |
| 516 | r = &par->regvals; |
| 517 | |
| 518 | /* Turn off display */ |
| 519 | out_le32(CNTRL_REG(p,ctrl), 0x400 | par->ctrl); |
| 520 | |
| 521 | set_control_clock(r->clock_params); |
| 522 | |
| 523 | RADACAL_WRITE(0x20, r->radacal_ctrl); |
| 524 | RADACAL_WRITE(0x21, p->control_use_bank2 ? 0 : 1); |
| 525 | RADACAL_WRITE(0x10, 0); |
| 526 | RADACAL_WRITE(0x11, 0); |
| 527 | |
| 528 | rp = &p->control_regs->vswin; |
| 529 | for (i = 0; i < 16; ++i, ++rp) |
| 530 | out_le32(&rp->r, r->regs[i]); |
| 531 | |
| 532 | out_le32(CNTRL_REG(p,pitch), par->pitch); |
| 533 | out_le32(CNTRL_REG(p,mode), r->mode); |
| 534 | out_le32(CNTRL_REG(p,vram_attr), p->vram_attr); |
| 535 | out_le32(CNTRL_REG(p,start_addr), par->yoffset * par->pitch |
| 536 | + (par->xoffset << cmode)); |
| 537 | out_le32(CNTRL_REG(p,rfrcnt), 0x1e5); |
| 538 | out_le32(CNTRL_REG(p,intr_ena), 0); |
| 539 | |
| 540 | /* Turn on display */ |
| 541 | out_le32(CNTRL_REG(p,ctrl), par->ctrl); |
| 542 | |
| 543 | #ifdef CONFIG_BOOTX_TEXT |
| 544 | btext_update_display(p->frame_buffer_phys + CTRLFB_OFF, |
| 545 | p->par.xres, p->par.yres, |
| 546 | (cmode == CMODE_32? 32: cmode == CMODE_16? 16: 8), |
| 547 | p->par.pitch); |
| 548 | #endif /* CONFIG_BOOTX_TEXT */ |
| 549 | } |
| 550 | |
| 551 | |
| 552 | /* |
Joe Perches | 75e1b6a | 2011-06-23 22:35:19 +0000 | [diff] [blame] | 553 | * Parse user specified options (`video=controlfb:') |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | */ |
Benjamin Herrenschmidt | cc5d018 | 2005-12-13 18:01:21 +1100 | [diff] [blame] | 555 | static void __init control_setup(char *options) |
| 556 | { |
| 557 | char *this_opt; |
| 558 | |
| 559 | if (!options || !*options) |
| 560 | return; |
| 561 | |
| 562 | while ((this_opt = strsep(&options, ",")) != NULL) { |
| 563 | if (!strncmp(this_opt, "vmode:", 6)) { |
| 564 | int vmode = simple_strtoul(this_opt+6, NULL, 0); |
| 565 | if (vmode > 0 && vmode <= VMODE_MAX && |
| 566 | control_mac_modes[vmode - 1].m[1] >= 0) |
| 567 | default_vmode = vmode; |
| 568 | } else if (!strncmp(this_opt, "cmode:", 6)) { |
| 569 | int depth = simple_strtoul(this_opt+6, NULL, 0); |
| 570 | switch (depth) { |
| 571 | case CMODE_8: |
| 572 | case CMODE_16: |
| 573 | case CMODE_32: |
| 574 | default_cmode = depth; |
| 575 | break; |
| 576 | case 8: |
| 577 | default_cmode = CMODE_8; |
| 578 | break; |
| 579 | case 15: |
| 580 | case 16: |
| 581 | default_cmode = CMODE_16; |
| 582 | break; |
| 583 | case 24: |
| 584 | case 32: |
| 585 | default_cmode = CMODE_32; |
| 586 | break; |
| 587 | } |
| 588 | } |
| 589 | } |
| 590 | } |
| 591 | |
| 592 | static int __init control_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | { |
| 594 | struct device_node *dp; |
| 595 | char *option = NULL; |
Stephen Rothwell | 30686ba | 2007-04-24 13:53:04 +1000 | [diff] [blame] | 596 | int ret = -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | |
| 598 | if (fb_get_options("controlfb", &option)) |
| 599 | return -ENODEV; |
| 600 | control_setup(option); |
| 601 | |
Stephen Rothwell | 30686ba | 2007-04-24 13:53:04 +1000 | [diff] [blame] | 602 | dp = of_find_node_by_name(NULL, "control"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | if (dp != 0 && !control_of_init(dp)) |
Stephen Rothwell | 30686ba | 2007-04-24 13:53:04 +1000 | [diff] [blame] | 604 | ret = 0; |
| 605 | of_node_put(dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | |
Stephen Rothwell | 30686ba | 2007-04-24 13:53:04 +1000 | [diff] [blame] | 607 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | } |
| 609 | |
| 610 | module_init(control_init); |
| 611 | |
| 612 | /* Work out which banks of VRAM we have installed. */ |
| 613 | /* danj: I guess the card just ignores writes to nonexistant VRAM... */ |
| 614 | |
| 615 | static void __init find_vram_size(struct fb_info_control *p) |
| 616 | { |
| 617 | int bank1, bank2; |
| 618 | |
| 619 | /* |
| 620 | * Set VRAM in 2MB (bank 1) mode |
| 621 | * VRAM Bank 2 will be accessible through offset 0x600000 if present |
| 622 | * and VRAM Bank 1 will not respond at that offset even if present |
| 623 | */ |
| 624 | out_le32(CNTRL_REG(p,vram_attr), 0x31); |
| 625 | |
| 626 | out_8(&p->frame_buffer[0x600000], 0xb3); |
| 627 | out_8(&p->frame_buffer[0x600001], 0x71); |
| 628 | asm volatile("eieio; dcbf 0,%0" : : "r" (&p->frame_buffer[0x600000]) |
| 629 | : "memory" ); |
| 630 | mb(); |
| 631 | asm volatile("eieio; dcbi 0,%0" : : "r" (&p->frame_buffer[0x600000]) |
| 632 | : "memory" ); |
| 633 | mb(); |
| 634 | |
| 635 | bank2 = (in_8(&p->frame_buffer[0x600000]) == 0xb3) |
| 636 | && (in_8(&p->frame_buffer[0x600001]) == 0x71); |
| 637 | |
| 638 | /* |
| 639 | * Set VRAM in 2MB (bank 2) mode |
| 640 | * VRAM Bank 1 will be accessible through offset 0x000000 if present |
| 641 | * and VRAM Bank 2 will not respond at that offset even if present |
| 642 | */ |
| 643 | out_le32(CNTRL_REG(p,vram_attr), 0x39); |
| 644 | |
| 645 | out_8(&p->frame_buffer[0], 0x5a); |
| 646 | out_8(&p->frame_buffer[1], 0xc7); |
| 647 | asm volatile("eieio; dcbf 0,%0" : : "r" (&p->frame_buffer[0]) |
| 648 | : "memory" ); |
| 649 | mb(); |
| 650 | asm volatile("eieio; dcbi 0,%0" : : "r" (&p->frame_buffer[0]) |
| 651 | : "memory" ); |
| 652 | mb(); |
| 653 | |
| 654 | bank1 = (in_8(&p->frame_buffer[0]) == 0x5a) |
| 655 | && (in_8(&p->frame_buffer[1]) == 0xc7); |
| 656 | |
| 657 | if (bank2) { |
| 658 | if (!bank1) { |
| 659 | /* |
| 660 | * vram bank 2 only |
| 661 | */ |
| 662 | p->control_use_bank2 = 1; |
| 663 | p->vram_attr = 0x39; |
| 664 | p->frame_buffer += 0x600000; |
| 665 | p->frame_buffer_phys += 0x600000; |
| 666 | } else { |
| 667 | /* |
| 668 | * 4 MB vram |
| 669 | */ |
| 670 | p->vram_attr = 0x51; |
| 671 | } |
| 672 | } else { |
| 673 | /* |
| 674 | * vram bank 1 only |
| 675 | */ |
| 676 | p->vram_attr = 0x31; |
| 677 | } |
| 678 | |
| 679 | p->total_vram = (bank1 + bank2) * 0x200000; |
| 680 | |
| 681 | printk(KERN_INFO "controlfb: VRAM Total = %dMB " |
| 682 | "(%dMB @ bank 1, %dMB @ bank 2)\n", |
| 683 | (bank1 + bank2) << 1, bank1 << 1, bank2 << 1); |
| 684 | } |
| 685 | |
| 686 | |
| 687 | /* |
| 688 | * find "control" and initialize |
| 689 | */ |
| 690 | static int __init control_of_init(struct device_node *dp) |
| 691 | { |
| 692 | struct fb_info_control *p; |
Benjamin Herrenschmidt | cc5d018 | 2005-12-13 18:01:21 +1100 | [diff] [blame] | 693 | struct resource fb_res, reg_res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | |
| 695 | if (control_fb) { |
| 696 | printk(KERN_ERR "controlfb: only one control is supported\n"); |
| 697 | return -ENXIO; |
| 698 | } |
Benjamin Herrenschmidt | cc5d018 | 2005-12-13 18:01:21 +1100 | [diff] [blame] | 699 | |
| 700 | if (of_pci_address_to_resource(dp, 2, &fb_res) || |
| 701 | of_pci_address_to_resource(dp, 1, ®_res)) { |
| 702 | printk(KERN_ERR "can't get 2 addresses for control\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | return -ENXIO; |
| 704 | } |
Jiri Slaby | f5610b9 | 2007-02-12 00:55:12 -0800 | [diff] [blame] | 705 | p = kzalloc(sizeof(*p), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | if (p == 0) |
| 707 | return -ENXIO; |
| 708 | control_fb = p; /* save it for cleanups */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | |
| 710 | /* Map in frame buffer and registers */ |
Benjamin Herrenschmidt | cc5d018 | 2005-12-13 18:01:21 +1100 | [diff] [blame] | 711 | p->fb_orig_base = fb_res.start; |
Joe Perches | 28f65c1 | 2011-06-09 09:13:32 -0700 | [diff] [blame] | 712 | p->fb_orig_size = resource_size(&fb_res); |
Benjamin Herrenschmidt | cc5d018 | 2005-12-13 18:01:21 +1100 | [diff] [blame] | 713 | /* use the big-endian aperture (??) */ |
| 714 | p->frame_buffer_phys = fb_res.start + 0x800000; |
| 715 | p->control_regs_phys = reg_res.start; |
Joe Perches | 28f65c1 | 2011-06-09 09:13:32 -0700 | [diff] [blame] | 716 | p->control_regs_size = resource_size(®_res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | |
| 718 | if (!p->fb_orig_base || |
| 719 | !request_mem_region(p->fb_orig_base,p->fb_orig_size,"controlfb")) { |
| 720 | p->fb_orig_base = 0; |
| 721 | goto error_out; |
| 722 | } |
| 723 | /* map at most 8MB for the frame buffer */ |
| 724 | p->frame_buffer = __ioremap(p->frame_buffer_phys, 0x800000, |
| 725 | _PAGE_WRITETHRU); |
| 726 | |
| 727 | if (!p->control_regs_phys || |
| 728 | !request_mem_region(p->control_regs_phys, p->control_regs_size, |
| 729 | "controlfb regs")) { |
| 730 | p->control_regs_phys = 0; |
| 731 | goto error_out; |
| 732 | } |
| 733 | p->control_regs = ioremap(p->control_regs_phys, p->control_regs_size); |
| 734 | |
| 735 | p->cmap_regs_phys = 0xf301b000; /* XXX not in prom? */ |
| 736 | if (!request_mem_region(p->cmap_regs_phys, 0x1000, "controlfb cmap")) { |
| 737 | p->cmap_regs_phys = 0; |
| 738 | goto error_out; |
| 739 | } |
| 740 | p->cmap_regs = ioremap(p->cmap_regs_phys, 0x1000); |
| 741 | |
| 742 | if (!p->cmap_regs || !p->control_regs || !p->frame_buffer) |
| 743 | goto error_out; |
| 744 | |
| 745 | find_vram_size(p); |
| 746 | if (!p->total_vram) |
| 747 | goto error_out; |
| 748 | |
| 749 | if (init_control(p) < 0) |
| 750 | goto error_out; |
| 751 | |
| 752 | return 0; |
| 753 | |
| 754 | error_out: |
| 755 | control_cleanup(); |
| 756 | return -ENXIO; |
| 757 | } |
| 758 | |
| 759 | /* |
| 760 | * Get the monitor sense value. |
| 761 | * Note that this can be called before calibrate_delay, |
| 762 | * so we can't use udelay. |
| 763 | */ |
| 764 | static int read_control_sense(struct fb_info_control *p) |
| 765 | { |
| 766 | int sense; |
| 767 | |
| 768 | out_le32(CNTRL_REG(p,mon_sense), 7); /* drive all lines high */ |
| 769 | __delay(200); |
| 770 | out_le32(CNTRL_REG(p,mon_sense), 077); /* turn off drivers */ |
| 771 | __delay(2000); |
| 772 | sense = (in_le32(CNTRL_REG(p,mon_sense)) & 0x1c0) << 2; |
| 773 | |
| 774 | /* drive each sense line low in turn and collect the other 2 */ |
| 775 | out_le32(CNTRL_REG(p,mon_sense), 033); /* drive A low */ |
| 776 | __delay(2000); |
| 777 | sense |= (in_le32(CNTRL_REG(p,mon_sense)) & 0xc0) >> 2; |
| 778 | out_le32(CNTRL_REG(p,mon_sense), 055); /* drive B low */ |
| 779 | __delay(2000); |
| 780 | sense |= ((in_le32(CNTRL_REG(p,mon_sense)) & 0x100) >> 5) |
| 781 | | ((in_le32(CNTRL_REG(p,mon_sense)) & 0x40) >> 4); |
| 782 | out_le32(CNTRL_REG(p,mon_sense), 066); /* drive C low */ |
| 783 | __delay(2000); |
| 784 | sense |= (in_le32(CNTRL_REG(p,mon_sense)) & 0x180) >> 7; |
| 785 | |
| 786 | out_le32(CNTRL_REG(p,mon_sense), 077); /* turn off drivers */ |
| 787 | |
| 788 | return sense; |
| 789 | } |
| 790 | |
| 791 | /********************** Various translation functions **********************/ |
| 792 | |
| 793 | #define CONTROL_PIXCLOCK_BASE 256016 |
| 794 | #define CONTROL_PIXCLOCK_MIN 5000 /* ~ 200 MHz dot clock */ |
| 795 | |
| 796 | /* |
| 797 | * calculate the clock paramaters to be sent to CUDA according to given |
| 798 | * pixclock in pico second. |
| 799 | */ |
| 800 | static int calc_clock_params(unsigned long clk, unsigned char *param) |
| 801 | { |
| 802 | unsigned long p0, p1, p2, k, l, m, n, min; |
| 803 | |
| 804 | if (clk > (CONTROL_PIXCLOCK_BASE << 3)) |
| 805 | return 1; |
| 806 | |
| 807 | p2 = ((clk << 4) < CONTROL_PIXCLOCK_BASE)? 3: 2; |
| 808 | l = clk << p2; |
| 809 | p0 = 0; |
| 810 | p1 = 0; |
| 811 | for (k = 1, min = l; k < 32; k++) { |
| 812 | unsigned long rem; |
| 813 | |
| 814 | m = CONTROL_PIXCLOCK_BASE * k; |
| 815 | n = m / l; |
| 816 | rem = m % l; |
| 817 | if (n && (n < 128) && rem < min) { |
| 818 | p0 = k; |
| 819 | p1 = n; |
| 820 | min = rem; |
| 821 | } |
| 822 | } |
| 823 | if (!p0 || !p1) |
| 824 | return 1; |
| 825 | |
| 826 | param[0] = p0; |
| 827 | param[1] = p1; |
| 828 | param[2] = p2; |
| 829 | |
| 830 | return 0; |
| 831 | } |
| 832 | |
| 833 | |
| 834 | /* |
| 835 | * This routine takes a user-supplied var, and picks the best vmode/cmode |
| 836 | * from it. |
| 837 | */ |
| 838 | |
| 839 | static int control_var_to_par(struct fb_var_screeninfo *var, |
| 840 | struct fb_par_control *par, const struct fb_info *fb_info) |
| 841 | { |
| 842 | int cmode, piped_diff, hstep; |
| 843 | unsigned hperiod, hssync, hsblank, hesync, heblank, piped, heq, hlfln, |
| 844 | hserr, vperiod, vssync, vesync, veblank, vsblank, vswin, vewin; |
| 845 | unsigned long pixclock; |
| 846 | struct fb_info_control *p = (struct fb_info_control *) fb_info; |
| 847 | struct control_regvals *r = &par->regvals; |
| 848 | |
| 849 | switch (var->bits_per_pixel) { |
| 850 | case 8: |
| 851 | par->cmode = CMODE_8; |
| 852 | if (p->total_vram > 0x200000) { |
| 853 | r->mode = 3; |
| 854 | r->radacal_ctrl = 0x20; |
| 855 | piped_diff = 13; |
| 856 | } else { |
| 857 | r->mode = 2; |
| 858 | r->radacal_ctrl = 0x10; |
| 859 | piped_diff = 9; |
| 860 | } |
| 861 | break; |
| 862 | case 15: |
| 863 | case 16: |
| 864 | par->cmode = CMODE_16; |
| 865 | if (p->total_vram > 0x200000) { |
| 866 | r->mode = 2; |
| 867 | r->radacal_ctrl = 0x24; |
| 868 | piped_diff = 5; |
| 869 | } else { |
| 870 | r->mode = 1; |
| 871 | r->radacal_ctrl = 0x14; |
| 872 | piped_diff = 3; |
| 873 | } |
| 874 | break; |
| 875 | case 32: |
| 876 | par->cmode = CMODE_32; |
| 877 | if (p->total_vram > 0x200000) { |
| 878 | r->mode = 1; |
| 879 | r->radacal_ctrl = 0x28; |
| 880 | } else { |
| 881 | r->mode = 0; |
| 882 | r->radacal_ctrl = 0x18; |
| 883 | } |
| 884 | piped_diff = 1; |
| 885 | break; |
| 886 | default: |
| 887 | return -EINVAL; |
| 888 | } |
| 889 | |
| 890 | /* |
| 891 | * adjust xres and vxres so that the corresponding memory widths are |
| 892 | * 32-byte aligned |
| 893 | */ |
| 894 | hstep = 31 >> par->cmode; |
| 895 | par->xres = (var->xres + hstep) & ~hstep; |
| 896 | par->vxres = (var->xres_virtual + hstep) & ~hstep; |
| 897 | par->xoffset = (var->xoffset + hstep) & ~hstep; |
| 898 | if (par->vxres < par->xres) |
| 899 | par->vxres = par->xres; |
| 900 | par->pitch = par->vxres << par->cmode; |
| 901 | |
| 902 | par->yres = var->yres; |
| 903 | par->vyres = var->yres_virtual; |
| 904 | par->yoffset = var->yoffset; |
| 905 | if (par->vyres < par->yres) |
| 906 | par->vyres = par->yres; |
| 907 | |
| 908 | par->sync = var->sync; |
| 909 | |
| 910 | if (par->pitch * par->vyres + CTRLFB_OFF > p->total_vram) |
| 911 | return -EINVAL; |
| 912 | |
| 913 | if (par->xoffset + par->xres > par->vxres) |
| 914 | par->xoffset = par->vxres - par->xres; |
| 915 | if (par->yoffset + par->yres > par->vyres) |
| 916 | par->yoffset = par->vyres - par->yres; |
| 917 | |
| 918 | pixclock = (var->pixclock < CONTROL_PIXCLOCK_MIN)? CONTROL_PIXCLOCK_MIN: |
| 919 | var->pixclock; |
| 920 | if (calc_clock_params(pixclock, r->clock_params)) |
| 921 | return -EINVAL; |
| 922 | |
| 923 | hperiod = ((var->left_margin + par->xres + var->right_margin |
| 924 | + var->hsync_len) >> 1) - 2; |
| 925 | hssync = hperiod + 1; |
| 926 | hsblank = hssync - (var->right_margin >> 1); |
| 927 | hesync = (var->hsync_len >> 1) - 1; |
| 928 | heblank = (var->left_margin >> 1) + hesync; |
| 929 | piped = heblank - piped_diff; |
| 930 | heq = var->hsync_len >> 2; |
| 931 | hlfln = (hperiod+2) >> 1; |
| 932 | hserr = hssync-hesync; |
| 933 | vperiod = (var->vsync_len + var->lower_margin + par->yres |
| 934 | + var->upper_margin) << 1; |
| 935 | vssync = vperiod - 2; |
| 936 | vesync = (var->vsync_len << 1) - vperiod + vssync; |
| 937 | veblank = (var->upper_margin << 1) + vesync; |
| 938 | vsblank = vssync - (var->lower_margin << 1); |
| 939 | vswin = (vsblank+vssync) >> 1; |
| 940 | vewin = (vesync+veblank) >> 1; |
| 941 | |
| 942 | r->regs[0] = vswin; |
| 943 | r->regs[1] = vsblank; |
| 944 | r->regs[2] = veblank; |
| 945 | r->regs[3] = vewin; |
| 946 | r->regs[4] = vesync; |
| 947 | r->regs[5] = vssync; |
| 948 | r->regs[6] = vperiod; |
| 949 | r->regs[7] = piped; |
| 950 | r->regs[8] = hperiod; |
| 951 | r->regs[9] = hsblank; |
| 952 | r->regs[10] = heblank; |
| 953 | r->regs[11] = hesync; |
| 954 | r->regs[12] = hssync; |
| 955 | r->regs[13] = heq; |
| 956 | r->regs[14] = hlfln; |
| 957 | r->regs[15] = hserr; |
| 958 | |
| 959 | if (par->xres >= 1280 && par->cmode >= CMODE_16) |
| 960 | par->ctrl = 0x7f; |
| 961 | else |
| 962 | par->ctrl = 0x3b; |
| 963 | |
| 964 | if (mac_var_to_vmode(var, &par->vmode, &cmode)) |
| 965 | par->vmode = 0; |
| 966 | |
| 967 | return 0; |
| 968 | } |
| 969 | |
| 970 | |
| 971 | /* |
| 972 | * Convert hardware data in par to an fb_var_screeninfo |
| 973 | */ |
| 974 | |
| 975 | static void control_par_to_var(struct fb_par_control *par, struct fb_var_screeninfo *var) |
| 976 | { |
| 977 | struct control_regints *rv; |
| 978 | |
| 979 | rv = (struct control_regints *) par->regvals.regs; |
| 980 | |
| 981 | memset(var, 0, sizeof(*var)); |
| 982 | var->xres = par->xres; |
| 983 | var->yres = par->yres; |
| 984 | var->xres_virtual = par->vxres; |
| 985 | var->yres_virtual = par->vyres; |
| 986 | var->xoffset = par->xoffset; |
| 987 | var->yoffset = par->yoffset; |
| 988 | |
| 989 | switch(par->cmode) { |
| 990 | default: |
| 991 | case CMODE_8: |
| 992 | var->bits_per_pixel = 8; |
| 993 | var->red.length = 8; |
| 994 | var->green.length = 8; |
| 995 | var->blue.length = 8; |
| 996 | break; |
| 997 | case CMODE_16: /* RGB 555 */ |
| 998 | var->bits_per_pixel = 16; |
| 999 | var->red.offset = 10; |
| 1000 | var->red.length = 5; |
| 1001 | var->green.offset = 5; |
| 1002 | var->green.length = 5; |
| 1003 | var->blue.length = 5; |
| 1004 | break; |
| 1005 | case CMODE_32: /* RGB 888 */ |
| 1006 | var->bits_per_pixel = 32; |
| 1007 | var->red.offset = 16; |
| 1008 | var->red.length = 8; |
| 1009 | var->green.offset = 8; |
| 1010 | var->green.length = 8; |
| 1011 | var->blue.length = 8; |
| 1012 | var->transp.offset = 24; |
| 1013 | var->transp.length = 8; |
| 1014 | break; |
| 1015 | } |
| 1016 | var->height = -1; |
| 1017 | var->width = -1; |
| 1018 | var->vmode = FB_VMODE_NONINTERLACED; |
| 1019 | |
| 1020 | var->left_margin = (rv->heblank - rv->hesync) << 1; |
| 1021 | var->right_margin = (rv->hssync - rv->hsblank) << 1; |
| 1022 | var->hsync_len = (rv->hperiod + 2 - rv->hssync + rv->hesync) << 1; |
| 1023 | |
| 1024 | var->upper_margin = (rv->veblank - rv->vesync) >> 1; |
| 1025 | var->lower_margin = (rv->vssync - rv->vsblank) >> 1; |
| 1026 | var->vsync_len = (rv->vperiod - rv->vssync + rv->vesync) >> 1; |
| 1027 | |
| 1028 | var->sync = par->sync; |
| 1029 | |
| 1030 | /* |
| 1031 | * 10^12 * clock_params[0] / (3906400 * clock_params[1] |
| 1032 | * * 2^clock_params[2]) |
| 1033 | * (10^12 * clock_params[0] / (3906400 * clock_params[1])) |
| 1034 | * >> clock_params[2] |
| 1035 | */ |
| 1036 | /* (255990.17 * clock_params[0] / clock_params[1]) >> clock_params[2] */ |
| 1037 | var->pixclock = CONTROL_PIXCLOCK_BASE * par->regvals.clock_params[0]; |
| 1038 | var->pixclock /= par->regvals.clock_params[1]; |
| 1039 | var->pixclock >>= par->regvals.clock_params[2]; |
| 1040 | } |
| 1041 | |
| 1042 | /* |
| 1043 | * Set misc info vars for this driver |
| 1044 | */ |
| 1045 | static void __init control_init_info(struct fb_info *info, struct fb_info_control *p) |
| 1046 | { |
| 1047 | /* Fill fb_info */ |
| 1048 | info->par = &p->par; |
| 1049 | info->fbops = &controlfb_ops; |
| 1050 | info->pseudo_palette = p->pseudo_palette; |
| 1051 | info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN; |
| 1052 | info->screen_base = p->frame_buffer + CTRLFB_OFF; |
| 1053 | |
| 1054 | fb_alloc_cmap(&info->cmap, 256, 0); |
| 1055 | |
| 1056 | /* Fill fix common fields */ |
| 1057 | strcpy(info->fix.id, "control"); |
| 1058 | info->fix.mmio_start = p->control_regs_phys; |
| 1059 | info->fix.mmio_len = sizeof(struct control_regs); |
| 1060 | info->fix.type = FB_TYPE_PACKED_PIXELS; |
| 1061 | info->fix.smem_start = p->frame_buffer_phys + CTRLFB_OFF; |
| 1062 | info->fix.smem_len = p->total_vram - CTRLFB_OFF; |
| 1063 | info->fix.ywrapstep = 0; |
| 1064 | info->fix.type_aux = 0; |
| 1065 | info->fix.accel = FB_ACCEL_NONE; |
| 1066 | } |
| 1067 | |
| 1068 | |
| 1069 | static void control_cleanup(void) |
| 1070 | { |
| 1071 | struct fb_info_control *p = control_fb; |
| 1072 | |
| 1073 | if (!p) |
| 1074 | return; |
| 1075 | |
| 1076 | if (p->cmap_regs) |
| 1077 | iounmap(p->cmap_regs); |
| 1078 | if (p->control_regs) |
| 1079 | iounmap(p->control_regs); |
| 1080 | if (p->frame_buffer) { |
| 1081 | if (p->control_use_bank2) |
| 1082 | p->frame_buffer -= 0x600000; |
| 1083 | iounmap(p->frame_buffer); |
| 1084 | } |
| 1085 | if (p->cmap_regs_phys) |
| 1086 | release_mem_region(p->cmap_regs_phys, 0x1000); |
| 1087 | if (p->control_regs_phys) |
| 1088 | release_mem_region(p->control_regs_phys, p->control_regs_size); |
| 1089 | if (p->fb_orig_base) |
| 1090 | release_mem_region(p->fb_orig_base, p->fb_orig_size); |
| 1091 | kfree(p); |
| 1092 | } |
| 1093 | |
| 1094 | |