linux/drivers/video/epson1355fb.c
<<
>>
Prefs
   1/*
   2 * linux/drivers/video/epson1355fb.c -- Epson S1D13505 frame buffer for 2.5.
   3 *
   4 * Epson Research S1D13505 Embedded RAMDAC LCD/CRT Controller
   5 *   (previously known as SED1355)
   6 *
   7 * Cf. http://vdc.epson.com/
   8 *
   9 *
  10 * Copyright (C) Hewlett-Packard Company.  All rights reserved.
  11 *
  12 * Written by Christopher Hoover <ch@hpl.hp.com>
  13 *
  14 * Adapted from:
  15 *
  16 *  linux/drivers/video/skeletonfb.c
  17 *  Modified to new api Jan 2001 by James Simmons (jsimmons@infradead.org)
  18 *  Created 28 Dec 1997 by Geert Uytterhoeven
  19 *
  20 *  linux/drivers/video/epson1355fb.c (2.4 driver)
  21 *  Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
  22 *
  23 * This file is subject to the terms and conditions of the GNU General Public
  24 * License. See the file COPYING in the main directory of this archive for
  25 * more details.
  26 *
  27 *
  28 * Noteworthy Issues
  29 * -----------------
  30 *
  31 * This driver is complicated by the fact that this is a 16-bit chip
  32 * and, on at least one platform (ceiva), we can only do 16-bit reads
  33 * and writes to the framebuffer.  We hide this from user space
  34 * except in the case of mmap().
  35 *
  36 *
  37 * To Do
  38 * -----
  39 *
  40 * - Test 8-bit pseudocolor mode
  41 * - Allow setting bpp, virtual resolution
  42 * - Implement horizontal panning
  43 * - (maybe) Implement hardware cursor
  44 */
  45
  46#include <linux/module.h>
  47#include <linux/kernel.h>
  48#include <linux/errno.h>
  49#include <linux/string.h>
  50#include <linux/mm.h>
  51#include <linux/delay.h>
  52#include <linux/fb.h>
  53#include <linux/init.h>
  54#include <linux/ioport.h>
  55#include <linux/platform_device.h>
  56
  57#include <asm/types.h>
  58#include <asm/io.h>
  59#include <linux/uaccess.h>
  60
  61#include <video/epson1355.h>
  62
  63struct epson1355_par {
  64        unsigned long reg_addr;
  65        u32 pseudo_palette[16];
  66};
  67
  68/* ------------------------------------------------------------------------- */
  69
  70#if defined(CONFIG_ARM)
  71
  72# ifdef CONFIG_ARCH_CEIVA
  73#  include <mach/hardware.h>
  74#  define EPSON1355FB_BASE_PHYS (CEIVA_PHYS_SED1355)
  75# endif
  76
  77static inline u8 epson1355_read_reg(struct epson1355_par *par, int index)
  78{
  79        return __raw_readb(par->reg_addr + index);
  80}
  81
  82static inline void epson1355_write_reg(struct epson1355_par *par, u8 data, int index)
  83{
  84        __raw_writeb(data, par->reg_addr + index);
  85}
  86
  87#else
  88# error "no architecture-specific epson1355_{read,write}_reg"
  89#endif
  90
  91#ifndef EPSON1355FB_BASE_PHYS
  92# error  "EPSON1355FB_BASE_PHYS is not defined"
  93#endif
  94
  95#define EPSON1355FB_REGS_OFS    (0)
  96#define EPSON1355FB_REGS_PHYS   (EPSON1355FB_BASE_PHYS + EPSON1355FB_REGS_OFS)
  97#define EPSON1355FB_REGS_LEN    (64)
  98
  99#define EPSON1355FB_FB_OFS      (0x00200000)
 100#define EPSON1355FB_FB_PHYS     (EPSON1355FB_BASE_PHYS + EPSON1355FB_FB_OFS)
 101#define EPSON1355FB_FB_LEN      (2 * 1024 * 1024)
 102
 103/* ------------------------------------------------------------------------- */
 104
 105static inline u16 epson1355_read_reg16(struct epson1355_par *par, int index)
 106{
 107        u8 lo = epson1355_read_reg(par, index);
 108        u8 hi = epson1355_read_reg(par, index + 1);
 109
 110        return (hi << 8) | lo;
 111}
 112
 113static inline void epson1355_write_reg16(struct epson1355_par *par, u16 data, int index)
 114{
 115        u8 lo = data & 0xff;
 116        u8 hi = (data >> 8) & 0xff;
 117
 118        epson1355_write_reg(par, lo, index);
 119        epson1355_write_reg(par, hi, index + 1);
 120}
 121
 122static inline u32 epson1355_read_reg20(struct epson1355_par *par, int index)
 123{
 124        u8 b0 = epson1355_read_reg(par, index);
 125        u8 b1 = epson1355_read_reg(par, index + 1);
 126        u8 b2 = epson1355_read_reg(par, index + 2);
 127
 128        return (b2 & 0x0f) << 16 | (b1 << 8) | b0;
 129}
 130
 131static inline void epson1355_write_reg20(struct epson1355_par *par, u32 data, int index)
 132{
 133        u8 b0 = data & 0xff;
 134        u8 b1 = (data >> 8) & 0xff;
 135        u8 b2 = (data >> 16) & 0x0f;
 136
 137        epson1355_write_reg(par, b0, index);
 138        epson1355_write_reg(par, b1, index + 1);
 139        epson1355_write_reg(par, b2, index + 2);
 140}
 141
 142/* ------------------------------------------------------------------------- */
 143
 144static void set_lut(struct epson1355_par *par, u8 index, u8 r, u8 g, u8 b)
 145{
 146        epson1355_write_reg(par, index, REG_LUT_ADDR);
 147        epson1355_write_reg(par, r, REG_LUT_DATA);
 148        epson1355_write_reg(par, g, REG_LUT_DATA);
 149        epson1355_write_reg(par, b, REG_LUT_DATA);
 150}
 151
 152
 153/**
 154 *      epson1355fb_setcolreg - sets a color register.
 155 *      @regno: Which register in the CLUT we are programming
 156 *      @red: The red value which can be up to 16 bits wide
 157 *      @green: The green value which can be up to 16 bits wide
 158 *      @blue:  The blue value which can be up to 16 bits wide.
 159 *      @transp: If supported the alpha value which can be up to 16 bits wide.
 160 *      @info: frame buffer info structure
 161 *
 162 *      Returns negative errno on error, or zero on success.
 163 */
 164static int epson1355fb_setcolreg(unsigned regno, unsigned r, unsigned g,
 165                                 unsigned b, unsigned transp,
 166                                 struct fb_info *info)
 167{
 168        struct epson1355_par *par = info->par;
 169
 170        if (info->var.grayscale)
 171                r = g = b = (19595 * r + 38470 * g + 7471 * b) >> 16;
 172
 173        switch (info->fix.visual) {
 174        case FB_VISUAL_TRUECOLOR:
 175                if (regno >= 16)
 176                        return -EINVAL;
 177
 178                ((u32 *) info->pseudo_palette)[regno] =
 179                    (r & 0xf800) | (g & 0xfc00) >> 5 | (b & 0xf800) >> 11;
 180
 181                break;
 182        case FB_VISUAL_PSEUDOCOLOR:
 183                if (regno >= 256)
 184                        return -EINVAL;
 185
 186                set_lut(par, regno, r >> 8, g >> 8, b >> 8);
 187
 188                break;
 189        default:
 190                return -ENOSYS;
 191        }
 192        return 0;
 193}
 194
 195/* ------------------------------------------------------------------------- */
 196
 197/**
 198 *      epson1355fb_pan_display - Pans the display.
 199 *      @var: frame buffer variable screen structure
 200 *      @info: frame buffer structure that represents a single frame buffer
 201 *
 202 *      Pan (or wrap, depending on the `vmode' field) the display using the
 203 *      `xoffset' and `yoffset' fields of the `var' structure.
 204 *      If the values don't fit, return -EINVAL.
 205 *
 206 *      Returns negative errno on error, or zero on success.
 207 */
 208static int epson1355fb_pan_display(struct fb_var_screeninfo *var,
 209                                   struct fb_info *info)
 210{
 211        struct epson1355_par *par = info->par;
 212        u32 start;
 213
 214        if (var->xoffset != 0)  /* not yet ... */
 215                return -EINVAL;
 216
 217        if (var->yoffset + info->var.yres > info->var.yres_virtual)
 218                return -EINVAL;
 219
 220        start = (info->fix.line_length >> 1) * var->yoffset;
 221
 222        epson1355_write_reg20(par, start, REG_SCRN1_DISP_START_ADDR0);
 223
 224        return 0;
 225}
 226
 227/* ------------------------------------------------------------------------- */
 228
 229static void lcd_enable(struct epson1355_par *par, int enable)
 230{
 231        u8 mode = epson1355_read_reg(par, REG_DISPLAY_MODE);
 232
 233        if (enable)
 234                mode |= 1;
 235        else
 236                mode &= ~1;
 237
 238        epson1355_write_reg(par, mode, REG_DISPLAY_MODE);
 239}
 240
 241#if defined(CONFIG_ARCH_CEIVA)
 242static void backlight_enable(int enable)
 243{
 244        /* ### this should be protected by a spinlock ... */
 245        u8 pddr = clps_readb(PDDR);
 246        if (enable)
 247                pddr |= (1 << 5);
 248        else
 249                pddr &= ~(1 << 5);
 250        clps_writeb(pddr, PDDR);
 251}
 252#else
 253static void backlight_enable(int enable)
 254{
 255}
 256#endif
 257
 258
 259/**
 260 *      epson1355fb_blank - blanks the display.
 261 *      @blank_mode: the blank mode we want.
 262 *      @info: frame buffer structure that represents a single frame buffer
 263 *
 264 *      Blank the screen if blank_mode != 0, else unblank. Return 0 if
 265 *      blanking succeeded, != 0 if un-/blanking failed due to e.g. a
 266 *      video mode which doesn't support it. Implements VESA suspend
 267 *      and powerdown modes on hardware that supports disabling hsync/vsync:
 268 *      blank_mode == 2: suspend vsync
 269 *      blank_mode == 3: suspend hsync
 270 *      blank_mode == 4: powerdown
 271 *
 272 *      Returns negative errno on error, or zero on success.
 273 *
 274 */
 275static int epson1355fb_blank(int blank_mode, struct fb_info *info)
 276{
 277        struct epson1355_par *par = info->par;
 278
 279        switch (blank_mode) {
 280        case FB_BLANK_UNBLANK:
 281        case FB_BLANK_NORMAL:
 282                lcd_enable(par, 1);
 283                backlight_enable(1);
 284                break;
 285        case FB_BLANK_VSYNC_SUSPEND:
 286        case FB_BLANK_HSYNC_SUSPEND:
 287                backlight_enable(0);
 288                break;
 289        case FB_BLANK_POWERDOWN:
 290                backlight_enable(0);
 291                lcd_enable(par, 0);
 292                break;
 293        default:
 294                return -EINVAL;
 295        }
 296
 297        /* let fbcon do a soft blank for us */
 298        return (blank_mode == FB_BLANK_NORMAL) ? 1 : 0;
 299}
 300
 301/* ------------------------------------------------------------------------- */
 302
 303/*
 304 * We can't use the cfb generic routines, as we have to limit
 305 * ourselves to 16-bit or 8-bit loads and stores to this 16-bit
 306 * chip.
 307 */
 308
 309static inline void epson1355fb_fb_writel(unsigned long v, unsigned long *a)
 310{
 311        u16 *p = (u16 *) a;
 312        u16 l = v & 0xffff;
 313        u16 h = v >> 16;
 314
 315        fb_writew(l, p);
 316        fb_writew(h, p + 1);
 317}
 318
 319static inline unsigned long epson1355fb_fb_readl(const unsigned long *a)
 320{
 321        const u16 *p = (u16 *) a;
 322        u16 l = fb_readw(p);
 323        u16 h = fb_readw(p + 1);
 324
 325        return (h << 16) | l;
 326}
 327
 328#define FB_READL epson1355fb_fb_readl
 329#define FB_WRITEL epson1355fb_fb_writel
 330
 331/* ------------------------------------------------------------------------- */
 332
 333static inline unsigned long copy_from_user16(void *to, const void *from,
 334                                             unsigned long n)
 335{
 336        u16 *dst = (u16 *) to;
 337        u16 *src = (u16 *) from;
 338
 339        if (!access_ok(VERIFY_READ, from, n))
 340                return n;
 341
 342        while (n > 1) {
 343                u16 v;
 344                if (__get_user(v, src))
 345                        return n;
 346
 347                fb_writew(v, dst);
 348
 349                src++, dst++;
 350                n -= 2;
 351        }
 352
 353        if (n) {
 354                u8 v;
 355
 356                if (__get_user(v, ((u8 *) src)))
 357                        return n;
 358
 359                fb_writeb(v, dst);
 360        }
 361        return 0;
 362}
 363
 364static inline unsigned long copy_to_user16(void *to, const void *from,
 365                                           unsigned long n)
 366{
 367        u16 *dst = (u16 *) to;
 368        u16 *src = (u16 *) from;
 369
 370        if (!access_ok(VERIFY_WRITE, to, n))
 371                return n;
 372
 373        while (n > 1) {
 374                u16 v = fb_readw(src);
 375
 376                if (__put_user(v, dst))
 377                        return n;
 378
 379                src++, dst++;
 380                n -= 2;
 381        }
 382
 383        if (n) {
 384                u8 v = fb_readb(src);
 385
 386                if (__put_user(v, ((u8 *) dst)))
 387                        return n;
 388        }
 389        return 0;
 390}
 391
 392
 393static ssize_t
 394epson1355fb_read(struct fb_info *info, char *buf, size_t count, loff_t * ppos)
 395{
 396        unsigned long p = *ppos;
 397
 398        if (p >= info->fix.smem_len)
 399                return 0;
 400        if (count >= info->fix.smem_len)
 401                count = info->fix.smem_len;
 402        if (count + p > info->fix.smem_len)
 403                count = info->fix.smem_len - p;
 404
 405        if (count) {
 406                char *base_addr;
 407
 408                base_addr = info->screen_base;
 409                count -= copy_to_user16(buf, base_addr + p, count);
 410                if (!count)
 411                        return -EFAULT;
 412                *ppos += count;
 413        }
 414        return count;
 415}
 416
 417static ssize_t
 418epson1355fb_write(struct fb_info *info, const char *buf,
 419                  size_t count, loff_t * ppos)
 420{
 421        unsigned long p = *ppos;
 422        int err;
 423
 424        /* from fbmem.c except for our own copy_*_user */
 425        if (p > info->fix.smem_len)
 426                return -ENOSPC;
 427        if (count >= info->fix.smem_len)
 428                count = info->fix.smem_len;
 429        err = 0;
 430        if (count + p > info->fix.smem_len) {
 431                count = info->fix.smem_len - p;
 432                err = -ENOSPC;
 433        }
 434
 435        if (count) {
 436                char *base_addr;
 437
 438                base_addr = info->screen_base;
 439                count -= copy_from_user16(base_addr + p, buf, count);
 440                *ppos += count;
 441                err = -EFAULT;
 442        }
 443        if (count)
 444                return count;
 445        return err;
 446}
 447
 448/* ------------------------------------------------------------------------- */
 449
 450static struct fb_ops epson1355fb_fbops = {
 451        .owner          = THIS_MODULE,
 452        .fb_setcolreg   = epson1355fb_setcolreg,
 453        .fb_pan_display = epson1355fb_pan_display,
 454        .fb_blank       = epson1355fb_blank,
 455        .fb_fillrect    = cfb_fillrect,
 456        .fb_copyarea    = cfb_copyarea,
 457        .fb_imageblit   = cfb_imageblit,
 458        .fb_read        = epson1355fb_read,
 459        .fb_write       = epson1355fb_write,
 460};
 461
 462/* ------------------------------------------------------------------------- */
 463
 464static __init unsigned int get_fb_size(struct fb_info *info)
 465{
 466        unsigned int size = 2 * 1024 * 1024;
 467        char *p = info->screen_base;
 468
 469        /* the 512k framebuffer is aliased at start + 0x80000 * n */
 470        fb_writeb(1, p);
 471        fb_writeb(0, p + 0x80000);
 472        if (!fb_readb(p))
 473                size = 512 * 1024;
 474
 475        fb_writeb(0, p);
 476
 477        return size;
 478}
 479
 480static int epson1355_width_tab[2][4] __devinitdata =
 481    { {4, 8, 16, -1}, {9, 12, 16, -1} };
 482static int epson1355_bpp_tab[8] __devinitdata = { 1, 2, 4, 8, 15, 16 };
 483
 484static void __devinit fetch_hw_state(struct fb_info *info, struct epson1355_par *par)
 485{
 486        struct fb_var_screeninfo *var = &info->var;
 487        struct fb_fix_screeninfo *fix = &info->fix;
 488        u8 panel, display;
 489        u16 offset;
 490        u32 xres, yres;
 491        u32 xres_virtual, yres_virtual;
 492        int bpp, lcd_bpp;
 493        int is_color, is_dual, is_tft;
 494        int lcd_enabled, crt_enabled;
 495
 496        fix->type = FB_TYPE_PACKED_PIXELS;
 497
 498        display = epson1355_read_reg(par, REG_DISPLAY_MODE);
 499        bpp = epson1355_bpp_tab[(display >> 2) & 7];
 500
 501        switch (bpp) {
 502        case 8:
 503                fix->visual = FB_VISUAL_PSEUDOCOLOR;
 504                var->bits_per_pixel = 8;
 505                var->red.offset = var->green.offset = var->blue.offset = 0;
 506                var->red.length = var->green.length = var->blue.length = 8;
 507                break;
 508        case 16:
 509                /* 5-6-5 RGB */
 510                fix->visual = FB_VISUAL_TRUECOLOR;
 511                var->bits_per_pixel = 16;
 512                var->red.offset = 11;
 513                var->red.length = 5;
 514                var->green.offset = 5;
 515                var->green.length = 6;
 516                var->blue.offset = 0;
 517                var->blue.length = 5;
 518                break;
 519        default:
 520                BUG();
 521        }
 522        fb_alloc_cmap(&(info->cmap), 256, 0);
 523
 524        panel = epson1355_read_reg(par, REG_PANEL_TYPE);
 525        is_color = (panel & 0x04) != 0;
 526        is_dual = (panel & 0x02) != 0;
 527        is_tft = (panel & 0x01) != 0;
 528        crt_enabled = (display & 0x02) != 0;
 529        lcd_enabled = (display & 0x01) != 0;
 530        lcd_bpp = epson1355_width_tab[is_tft][(panel >> 4) & 3];
 531
 532        xres = (epson1355_read_reg(par, REG_HORZ_DISP_WIDTH) + 1) * 8;
 533        yres = (epson1355_read_reg16(par, REG_VERT_DISP_HEIGHT0) + 1) *
 534            ((is_dual && !crt_enabled) ? 2 : 1);
 535        offset = epson1355_read_reg16(par, REG_MEM_ADDR_OFFSET0) & 0x7ff;
 536        xres_virtual = offset * 16 / bpp;
 537        yres_virtual = fix->smem_len / (offset * 2);
 538
 539        var->xres = xres;
 540        var->yres = yres;
 541        var->xres_virtual = xres_virtual;
 542        var->yres_virtual = yres_virtual;
 543        var->xoffset = var->yoffset = 0;
 544
 545        fix->line_length = offset * 2;
 546
 547        fix->xpanstep = 0;      /* no pan yet */
 548        fix->ypanstep = 1;
 549        fix->ywrapstep = 0;
 550        fix->accel = FB_ACCEL_NONE;
 551
 552        var->grayscale = !is_color;
 553
 554#ifdef DEBUG
 555        printk(KERN_INFO
 556               "epson1355fb: xres=%d, yres=%d, "
 557               "is_color=%d, is_dual=%d, is_tft=%d\n",
 558               xres, yres, is_color, is_dual, is_tft);
 559        printk(KERN_INFO
 560               "epson1355fb: bpp=%d, lcd_bpp=%d, "
 561               "crt_enabled=%d, lcd_enabled=%d\n",
 562               bpp, lcd_bpp, crt_enabled, lcd_enabled);
 563#endif
 564}
 565
 566
 567static void clearfb16(struct fb_info *info)
 568{
 569        u16 *dst = (u16 *) info->screen_base;
 570        unsigned long n = info->fix.smem_len;
 571
 572        while (n > 1) {
 573                fb_writew(0, dst);
 574                dst++, n -= 2;
 575        }
 576
 577        if (n)
 578                fb_writeb(0, dst);
 579}
 580
 581static int epson1355fb_remove(struct platform_device *dev)
 582{
 583        struct fb_info *info = platform_get_drvdata(dev);
 584        struct epson1355_par *par = info->par;
 585
 586        backlight_enable(0);
 587        if (par) {
 588                lcd_enable(par, 0);
 589                if (par && par->reg_addr)
 590                        iounmap((void *) par->reg_addr);
 591        }
 592
 593        if (info) {
 594                fb_dealloc_cmap(&info->cmap);
 595                if (info->screen_base)
 596                        iounmap(info->screen_base);
 597                framebuffer_release(info);
 598        }
 599        release_mem_region(EPSON1355FB_FB_PHYS, EPSON1355FB_FB_LEN);
 600        release_mem_region(EPSON1355FB_REGS_PHYS, EPSON1355FB_REGS_LEN);
 601        return 0;
 602}
 603
 604static int __devinit epson1355fb_probe(struct platform_device *dev)
 605{
 606        struct epson1355_par *default_par;
 607        struct fb_info *info;
 608        u8 revision;
 609        int rc = 0;
 610
 611        if (!request_mem_region(EPSON1355FB_REGS_PHYS, EPSON1355FB_REGS_LEN, "S1D13505 registers")) {
 612                printk(KERN_ERR "epson1355fb: unable to reserve "
 613                       "registers at 0x%0x\n", EPSON1355FB_REGS_PHYS);
 614                rc = -EBUSY;
 615                goto bail;
 616        }
 617
 618        if (!request_mem_region(EPSON1355FB_FB_PHYS, EPSON1355FB_FB_LEN,
 619                                "S1D13505 framebuffer")) {
 620                printk(KERN_ERR "epson1355fb: unable to reserve "
 621                       "framebuffer at 0x%0x\n", EPSON1355FB_FB_PHYS);
 622                rc = -EBUSY;
 623                goto bail;
 624        }
 625
 626        info = framebuffer_alloc(sizeof(struct epson1355_par), &dev->dev);
 627        if (!info) {
 628                rc = -ENOMEM;
 629                goto bail;
 630        }
 631
 632        default_par = info->par;
 633        default_par->reg_addr = (unsigned long) ioremap(EPSON1355FB_REGS_PHYS, EPSON1355FB_REGS_LEN);
 634        if (!default_par->reg_addr) {
 635                printk(KERN_ERR "epson1355fb: unable to map registers\n");
 636                rc = -ENOMEM;
 637                goto bail;
 638        }
 639        info->pseudo_palette = default_par->pseudo_palette;
 640
 641        info->screen_base = ioremap(EPSON1355FB_FB_PHYS, EPSON1355FB_FB_LEN);
 642        if (!info->screen_base) {
 643                printk(KERN_ERR "epson1355fb: unable to map framebuffer\n");
 644                rc = -ENOMEM;
 645                goto bail;
 646        }
 647
 648        revision = epson1355_read_reg(default_par, REG_REVISION_CODE);
 649        if ((revision >> 2) != 3) {
 650                printk(KERN_INFO "epson1355fb: epson1355 not found\n");
 651                rc = -ENODEV;
 652                goto bail;
 653        }
 654
 655        info->fix.mmio_start = EPSON1355FB_REGS_PHYS;
 656        info->fix.mmio_len = EPSON1355FB_REGS_LEN;
 657        info->fix.smem_start = EPSON1355FB_FB_PHYS;
 658        info->fix.smem_len = get_fb_size(info);
 659
 660        printk(KERN_INFO "epson1355fb: regs mapped at 0x%lx, fb %d KiB mapped at 0x%p\n",
 661               default_par->reg_addr, info->fix.smem_len / 1024, info->screen_base);
 662
 663        strcpy(info->fix.id, "S1D13505");
 664        info->par = default_par;
 665        info->fbops = &epson1355fb_fbops;
 666        info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
 667
 668        /* we expect the boot loader to have initialized the chip
 669           with appropriate parameters from which we can determinte
 670           the flavor of lcd panel attached */
 671        fetch_hw_state(info, default_par);
 672
 673        /* turn this puppy on ... */
 674        clearfb16(info);
 675        backlight_enable(1);
 676        lcd_enable(default_par, 1);
 677
 678        if (register_framebuffer(info) < 0) {
 679                rc = -EINVAL;
 680                goto bail;
 681        }
 682        /*
 683         * Our driver data.
 684         */
 685        platform_set_drvdata(dev, info);
 686
 687        printk(KERN_INFO "fb%d: %s frame buffer device\n",
 688               info->node, info->fix.id);
 689
 690        return 0;
 691
 692      bail:
 693        epson1355fb_remove(dev);
 694        return rc;
 695}
 696
 697static struct platform_driver epson1355fb_driver = {
 698        .probe  = epson1355fb_probe,
 699        .remove = epson1355fb_remove,
 700        .driver = {
 701                .name   = "epson1355fb",
 702        },
 703};
 704
 705static struct platform_device *epson1355fb_device;
 706
 707int __init epson1355fb_init(void)
 708{
 709        int ret = 0;
 710
 711        if (fb_get_options("epson1355fb", NULL))
 712                return -ENODEV;
 713
 714        ret = platform_driver_register(&epson1355fb_driver);
 715
 716        if (!ret) {
 717                epson1355fb_device = platform_device_alloc("epson1355fb", 0);
 718
 719                if (epson1355fb_device)
 720                        ret = platform_device_add(epson1355fb_device);
 721                else
 722                        ret = -ENOMEM;
 723
 724                if (ret) {
 725                        platform_device_put(epson1355fb_device);
 726                        platform_driver_unregister(&epson1355fb_driver);
 727                }
 728        }
 729
 730        return ret;
 731}
 732
 733module_init(epson1355fb_init);
 734        
 735#ifdef MODULE
 736static void __exit epson1355fb_exit(void)
 737{
 738        platform_device_unregister(epson1355fb_device);
 739        platform_driver_unregister(&epson1355fb_driver);
 740}
 741
 742/* ------------------------------------------------------------------------- */
 743
 744module_exit(epson1355fb_exit);
 745#endif
 746
 747MODULE_AUTHOR("Christopher Hoover <ch@hpl.hp.com>");
 748MODULE_DESCRIPTION("Framebuffer driver for Epson S1D13505");
 749MODULE_LICENSE("GPL");
 750
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.