blob: cc2810ef5de5d8467ac30566448454d0cdd5598e [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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://www.erd.epson.com/vdc/html/S1D13505.html
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#include <linux/slab.h>
52#include <linux/delay.h>
53#include <linux/fb.h>
54#include <linux/init.h>
55#include <linux/ioport.h>
Russell Kingd052d1b2005-10-29 19:07:23 +010056#include <linux/platform_device.h>
57
Linus Torvalds1da177e2005-04-16 15:20:36 -070058#include <asm/types.h>
59#include <asm/io.h>
Krzysztof Helt84902b72007-10-16 01:29:04 -070060#include <linux/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
62#include <video/epson1355.h>
63
64struct epson1355_par {
65 unsigned long reg_addr;
Antonino A. Daplas4a1b9272007-07-17 04:05:36 -070066 u32 pseudo_palette[16];
Linus Torvalds1da177e2005-04-16 15:20:36 -070067};
68
69/* ------------------------------------------------------------------------- */
70
Paul Mundt1a3f2882007-07-17 04:05:48 -070071#if defined(CONFIG_ARM)
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
73# ifdef CONFIG_ARCH_CEIVA
74# include <asm/arch/hardware.h>
75# define EPSON1355FB_BASE_PHYS (CEIVA_PHYS_SED1355)
76# endif
77
78static inline u8 epson1355_read_reg(struct epson1355_par *par, int index)
79{
80 return __raw_readb(par->reg_addr + index);
81}
82
83static inline void epson1355_write_reg(struct epson1355_par *par, u8 data, int index)
84{
85 __raw_writeb(data, par->reg_addr + index);
86}
87
88#else
89# error "no architecture-specific epson1355_{read,write}_reg"
90#endif
91
92#ifndef EPSON1355FB_BASE_PHYS
93# error "EPSON1355FB_BASE_PHYS is not defined"
94#endif
95
96#define EPSON1355FB_REGS_OFS (0)
97#define EPSON1355FB_REGS_PHYS (EPSON1355FB_BASE_PHYS + EPSON1355FB_REGS_OFS)
98#define EPSON1355FB_REGS_LEN (64)
99
100#define EPSON1355FB_FB_OFS (0x00200000)
101#define EPSON1355FB_FB_PHYS (EPSON1355FB_BASE_PHYS + EPSON1355FB_FB_OFS)
102#define EPSON1355FB_FB_LEN (2 * 1024 * 1024)
103
104/* ------------------------------------------------------------------------- */
105
106static inline u16 epson1355_read_reg16(struct epson1355_par *par, int index)
107{
108 u8 lo = epson1355_read_reg(par, index);
109 u8 hi = epson1355_read_reg(par, index + 1);
110
111 return (hi << 8) | lo;
112}
113
114static inline void epson1355_write_reg16(struct epson1355_par *par, u16 data, int index)
115{
116 u8 lo = data & 0xff;
117 u8 hi = (data >> 8) & 0xff;
118
119 epson1355_write_reg(par, lo, index);
120 epson1355_write_reg(par, hi, index + 1);
121}
122
123static inline u32 epson1355_read_reg20(struct epson1355_par *par, int index)
124{
125 u8 b0 = epson1355_read_reg(par, index);
126 u8 b1 = epson1355_read_reg(par, index + 1);
127 u8 b2 = epson1355_read_reg(par, index + 2);
128
129 return (b2 & 0x0f) << 16 | (b1 << 8) | b0;
130}
131
132static inline void epson1355_write_reg20(struct epson1355_par *par, u32 data, int index)
133{
134 u8 b0 = data & 0xff;
135 u8 b1 = (data >> 8) & 0xff;
136 u8 b2 = (data >> 16) & 0x0f;
137
138 epson1355_write_reg(par, b0, index);
139 epson1355_write_reg(par, b1, index + 1);
140 epson1355_write_reg(par, b2, index + 2);
141}
142
143/* ------------------------------------------------------------------------- */
144
145static void set_lut(struct epson1355_par *par, u8 index, u8 r, u8 g, u8 b)
146{
147 epson1355_write_reg(par, index, REG_LUT_ADDR);
148 epson1355_write_reg(par, r, REG_LUT_DATA);
149 epson1355_write_reg(par, g, REG_LUT_DATA);
150 epson1355_write_reg(par, b, REG_LUT_DATA);
151}
152
153
154/**
155 * epson1355fb_setcolreg - sets a color register.
156 * @regno: Which register in the CLUT we are programming
157 * @red: The red value which can be up to 16 bits wide
158 * @green: The green value which can be up to 16 bits wide
159 * @blue: The blue value which can be up to 16 bits wide.
160 * @transp: If supported the alpha value which can be up to 16 bits wide.
161 * @info: frame buffer info structure
162 *
163 * Returns negative errno on error, or zero on success.
164 */
165static int epson1355fb_setcolreg(unsigned regno, unsigned r, unsigned g,
166 unsigned b, unsigned transp,
167 struct fb_info *info)
168{
169 struct epson1355_par *par = info->par;
170
171 if (info->var.grayscale)
172 r = g = b = (19595 * r + 38470 * g + 7471 * b) >> 16;
173
174 switch (info->fix.visual) {
175 case FB_VISUAL_TRUECOLOR:
176 if (regno >= 16)
177 return -EINVAL;
178
179 ((u32 *) info->pseudo_palette)[regno] =
180 (r & 0xf800) | (g & 0xfc00) >> 5 | (b & 0xf800) >> 11;
181
182 break;
183 case FB_VISUAL_PSEUDOCOLOR:
184 if (regno >= 256)
185 return -EINVAL;
186
187 set_lut(par, regno, r >> 8, g >> 8, b >> 8);
188
189 break;
190 default:
191 return -ENOSYS;
192 }
193 return 0;
194}
195
196/* ------------------------------------------------------------------------- */
197
198/**
199 * epson1355fb_pan_display - Pans the display.
200 * @var: frame buffer variable screen structure
201 * @info: frame buffer structure that represents a single frame buffer
202 *
203 * Pan (or wrap, depending on the `vmode' field) the display using the
204 * `xoffset' and `yoffset' fields of the `var' structure.
205 * If the values don't fit, return -EINVAL.
206 *
207 * Returns negative errno on error, or zero on success.
208 */
209static int epson1355fb_pan_display(struct fb_var_screeninfo *var,
210 struct fb_info *info)
211{
212 struct epson1355_par *par = info->par;
213 u32 start;
214
215 if (var->xoffset != 0) /* not yet ... */
216 return -EINVAL;
217
218 if (var->yoffset + info->var.yres > info->var.yres_virtual)
219 return -EINVAL;
220
221 start = (info->fix.line_length >> 1) * var->yoffset;
222
223 epson1355_write_reg20(par, start, REG_SCRN1_DISP_START_ADDR0);
224
225 return 0;
226}
227
228/* ------------------------------------------------------------------------- */
229
230static void lcd_enable(struct epson1355_par *par, int enable)
231{
232 u8 mode = epson1355_read_reg(par, REG_DISPLAY_MODE);
233
234 if (enable)
235 mode |= 1;
236 else
237 mode &= ~1;
238
239 epson1355_write_reg(par, mode, REG_DISPLAY_MODE);
240}
241
242#if defined(CONFIG_ARCH_CEIVA)
243static void backlight_enable(int enable)
244{
245 /* ### this should be protected by a spinlock ... */
246 u8 pddr = clps_readb(PDDR);
247 if (enable)
248 pddr |= (1 << 5);
249 else
250 pddr &= ~(1 << 5);
251 clps_writeb(pddr, PDDR);
252}
253#else
254static void backlight_enable(int enable)
255{
256}
257#endif
258
259
260/**
261 * epson1355fb_blank - blanks the display.
262 * @blank_mode: the blank mode we want.
263 * @info: frame buffer structure that represents a single frame buffer
264 *
265 * Blank the screen if blank_mode != 0, else unblank. Return 0 if
266 * blanking succeeded, != 0 if un-/blanking failed due to e.g. a
267 * video mode which doesn't support it. Implements VESA suspend
268 * and powerdown modes on hardware that supports disabling hsync/vsync:
269 * blank_mode == 2: suspend vsync
270 * blank_mode == 3: suspend hsync
271 * blank_mode == 4: powerdown
272 *
273 * Returns negative errno on error, or zero on success.
274 *
275 */
276static int epson1355fb_blank(int blank_mode, struct fb_info *info)
277{
278 struct epson1355_par *par = info->par;
279
280 switch (blank_mode) {
Paul Mundt1a3f2882007-07-17 04:05:48 -0700281 case FB_BLANK_UNBLANK:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 case FB_BLANK_NORMAL:
283 lcd_enable(par, 1);
284 backlight_enable(1);
285 break;
286 case FB_BLANK_VSYNC_SUSPEND:
287 case FB_BLANK_HSYNC_SUSPEND:
288 backlight_enable(0);
289 break;
290 case FB_BLANK_POWERDOWN:
291 backlight_enable(0);
292 lcd_enable(par, 0);
293 break;
294 default:
295 return -EINVAL;
296 }
297
298 /* let fbcon do a soft blank for us */
299 return (blank_mode == FB_BLANK_NORMAL) ? 1 : 0;
300}
301
302/* ------------------------------------------------------------------------- */
303
304/*
305 * We can't use the cfb generic routines, as we have to limit
306 * ourselves to 16-bit or 8-bit loads and stores to this 16-bit
307 * chip.
308 */
309
310static inline void epson1355fb_fb_writel(unsigned long v, unsigned long *a)
311{
312 u16 *p = (u16 *) a;
313 u16 l = v & 0xffff;
314 u16 h = v >> 16;
315
316 fb_writew(l, p);
317 fb_writew(h, p + 1);
318}
319
320static inline unsigned long epson1355fb_fb_readl(const unsigned long *a)
321{
322 const u16 *p = (u16 *) a;
323 u16 l = fb_readw(p);
324 u16 h = fb_readw(p + 1);
325
326 return (h << 16) | l;
327}
328
329#define FB_READL epson1355fb_fb_readl
330#define FB_WRITEL epson1355fb_fb_writel
331
332/* ------------------------------------------------------------------------- */
333
334static inline unsigned long copy_from_user16(void *to, const void *from,
335 unsigned long n)
336{
337 u16 *dst = (u16 *) to;
338 u16 *src = (u16 *) from;
339
340 if (!access_ok(VERIFY_READ, from, n))
341 return n;
342
343 while (n > 1) {
344 u16 v;
345 if (__get_user(v, src))
346 return n;
347
348 fb_writew(v, dst);
349
350 src++, dst++;
351 n -= 2;
352 }
353
354 if (n) {
355 u8 v;
356
357 if (__get_user(v, ((u8 *) src)))
358 return n;
359
360 fb_writeb(v, dst);
361 }
362 return 0;
363}
364
365static inline unsigned long copy_to_user16(void *to, const void *from,
366 unsigned long n)
367{
368 u16 *dst = (u16 *) to;
369 u16 *src = (u16 *) from;
370
371 if (!access_ok(VERIFY_WRITE, to, n))
372 return n;
373
374 while (n > 1) {
375 u16 v = fb_readw(src);
376
377 if (__put_user(v, dst))
378 return n;
379
380 src++, dst++;
381 n -= 2;
382 }
383
384 if (n) {
385 u8 v = fb_readb(src);
386
387 if (__put_user(v, ((u8 *) dst)))
388 return n;
389 }
390 return 0;
391}
392
393
394static ssize_t
Antonino A. Daplas3f9b0882007-05-08 00:39:02 -0700395epson1355fb_read(struct fb_info *info, char *buf, size_t count, loff_t * ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 unsigned long p = *ppos;
398
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 if (p >= info->fix.smem_len)
400 return 0;
401 if (count >= info->fix.smem_len)
402 count = info->fix.smem_len;
403 if (count + p > info->fix.smem_len)
404 count = info->fix.smem_len - p;
405
406 if (count) {
407 char *base_addr;
408
409 base_addr = info->screen_base;
410 count -= copy_to_user16(buf, base_addr + p, count);
411 if (!count)
412 return -EFAULT;
413 *ppos += count;
414 }
415 return count;
416}
417
418static ssize_t
Antonino A. Daplas3f9b0882007-05-08 00:39:02 -0700419epson1355fb_write(struct fb_info *info, const char *buf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 size_t count, loff_t * ppos)
421{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 unsigned long p = *ppos;
423 int err;
424
425 /* from fbmem.c except for our own copy_*_user */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 if (p > info->fix.smem_len)
427 return -ENOSPC;
428 if (count >= info->fix.smem_len)
429 count = info->fix.smem_len;
430 err = 0;
431 if (count + p > info->fix.smem_len) {
432 count = info->fix.smem_len - p;
433 err = -ENOSPC;
434 }
435
436 if (count) {
437 char *base_addr;
438
439 base_addr = info->screen_base;
440 count -= copy_from_user16(base_addr + p, buf, count);
441 *ppos += count;
442 err = -EFAULT;
443 }
444 if (count)
445 return count;
446 return err;
447}
448
449/* ------------------------------------------------------------------------- */
450
451static struct fb_ops epson1355fb_fbops = {
452 .owner = THIS_MODULE,
453 .fb_setcolreg = epson1355fb_setcolreg,
454 .fb_pan_display = epson1355fb_pan_display,
455 .fb_blank = epson1355fb_blank,
456 .fb_fillrect = cfb_fillrect,
457 .fb_copyarea = cfb_copyarea,
458 .fb_imageblit = cfb_imageblit,
459 .fb_read = epson1355fb_read,
460 .fb_write = epson1355fb_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461};
462
463/* ------------------------------------------------------------------------- */
464
465static __init unsigned int get_fb_size(struct fb_info *info)
466{
467 unsigned int size = 2 * 1024 * 1024;
468 char *p = info->screen_base;
469
470 /* the 512k framebuffer is aliased at start + 0x80000 * n */
471 fb_writeb(1, p);
472 fb_writeb(0, p + 0x80000);
473 if (!fb_readb(p))
474 size = 512 * 1024;
475
476 fb_writeb(0, p);
477
478 return size;
479}
480
481static int epson1355_width_tab[2][4] __initdata =
482 { {4, 8, 16, -1}, {9, 12, 16, -1} };
483static int epson1355_bpp_tab[8] __initdata = { 1, 2, 4, 8, 15, 16 };
484
485static void __init fetch_hw_state(struct fb_info *info, struct epson1355_par *par)
486{
487 struct fb_var_screeninfo *var = &info->var;
488 struct fb_fix_screeninfo *fix = &info->fix;
489 u8 panel, display;
490 u16 offset;
491 u32 xres, yres;
492 u32 xres_virtual, yres_virtual;
493 int bpp, lcd_bpp;
494 int is_color, is_dual, is_tft;
495 int lcd_enabled, crt_enabled;
496
497 fix->type = FB_TYPE_PACKED_PIXELS;
498
499 display = epson1355_read_reg(par, REG_DISPLAY_MODE);
500 bpp = epson1355_bpp_tab[(display >> 2) & 7];
501
502 switch (bpp) {
503 case 8:
504 fix->visual = FB_VISUAL_PSEUDOCOLOR;
505 var->bits_per_pixel = 8;
506 var->red.offset = var->green.offset = var->blue.offset = 0;
507 var->red.length = var->green.length = var->blue.length = 8;
508 break;
509 case 16:
510 /* 5-6-5 RGB */
511 fix->visual = FB_VISUAL_TRUECOLOR;
512 var->bits_per_pixel = 16;
513 var->red.offset = 11;
514 var->red.length = 5;
515 var->green.offset = 5;
516 var->green.length = 6;
517 var->blue.offset = 0;
518 var->blue.length = 5;
519 break;
520 default:
521 BUG();
522 }
523 fb_alloc_cmap(&(info->cmap), 256, 0);
524
525 panel = epson1355_read_reg(par, REG_PANEL_TYPE);
526 is_color = (panel & 0x04) != 0;
527 is_dual = (panel & 0x02) != 0;
528 is_tft = (panel & 0x01) != 0;
529 crt_enabled = (display & 0x02) != 0;
530 lcd_enabled = (display & 0x01) != 0;
531 lcd_bpp = epson1355_width_tab[is_tft][(panel >> 4) & 3];
532
533 xres = (epson1355_read_reg(par, REG_HORZ_DISP_WIDTH) + 1) * 8;
534 yres = (epson1355_read_reg16(par, REG_VERT_DISP_HEIGHT0) + 1) *
535 ((is_dual && !crt_enabled) ? 2 : 1);
536 offset = epson1355_read_reg16(par, REG_MEM_ADDR_OFFSET0) & 0x7ff;
537 xres_virtual = offset * 16 / bpp;
538 yres_virtual = fix->smem_len / (offset * 2);
539
540 var->xres = xres;
541 var->yres = yres;
542 var->xres_virtual = xres_virtual;
543 var->yres_virtual = yres_virtual;
544 var->xoffset = var->yoffset = 0;
545
546 fix->line_length = offset * 2;
547
548 fix->xpanstep = 0; /* no pan yet */
549 fix->ypanstep = 1;
550 fix->ywrapstep = 0;
551 fix->accel = FB_ACCEL_NONE;
552
553 var->grayscale = !is_color;
554
555#ifdef DEBUG
556 printk(KERN_INFO
557 "epson1355fb: xres=%d, yres=%d, "
558 "is_color=%d, is_dual=%d, is_tft=%d\n",
559 xres, yres, is_color, is_dual, is_tft);
560 printk(KERN_INFO
561 "epson1355fb: bpp=%d, lcd_bpp=%d, "
562 "crt_enabled=%d, lcd_enabled=%d\n",
563 bpp, lcd_bpp, crt_enabled, lcd_enabled);
564#endif
565}
566
567
568static void clearfb16(struct fb_info *info)
569{
570 u16 *dst = (u16 *) info->screen_base;
571 unsigned long n = info->fix.smem_len;
572
573 while (n > 1) {
574 fb_writew(0, dst);
575 dst++, n -= 2;
576 }
577
578 if (n)
579 fb_writeb(0, dst);
580}
581
Russell King3ae5eae2005-11-09 22:32:44 +0000582static int epson1355fb_remove(struct platform_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583{
Russell King3ae5eae2005-11-09 22:32:44 +0000584 struct fb_info *info = platform_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585 struct epson1355_par *par = info->par;
586
587 backlight_enable(0);
588 if (par) {
589 lcd_enable(par, 0);
590 if (par && par->reg_addr)
591 iounmap((void *) par->reg_addr);
592 }
593
594 if (info) {
595 fb_dealloc_cmap(&info->cmap);
596 if (info->screen_base)
597 iounmap(info->screen_base);
598 framebuffer_release(info);
599 }
600 release_mem_region(EPSON1355FB_FB_PHYS, EPSON1355FB_FB_LEN);
601 release_mem_region(EPSON1355FB_REGS_PHYS, EPSON1355FB_REGS_LEN);
602 return 0;
603}
604
Russell King3ae5eae2005-11-09 22:32:44 +0000605int __init epson1355fb_probe(struct platform_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 struct epson1355_par *default_par;
608 struct fb_info *info;
609 u8 revision;
610 int rc = 0;
611
612 if (!request_mem_region(EPSON1355FB_REGS_PHYS, EPSON1355FB_REGS_LEN, "S1D13505 registers")) {
613 printk(KERN_ERR "epson1355fb: unable to reserve "
614 "registers at 0x%0x\n", EPSON1355FB_REGS_PHYS);
615 rc = -EBUSY;
616 goto bail;
617 }
618
619 if (!request_mem_region(EPSON1355FB_FB_PHYS, EPSON1355FB_FB_LEN,
620 "S1D13505 framebuffer")) {
621 printk(KERN_ERR "epson1355fb: unable to reserve "
622 "framebuffer at 0x%0x\n", EPSON1355FB_FB_PHYS);
623 rc = -EBUSY;
624 goto bail;
625 }
626
Antonino A. Daplas4a1b9272007-07-17 04:05:36 -0700627 info = framebuffer_alloc(sizeof(struct epson1355_par), &dev->dev);
Roland Stigge19f3d3a2007-05-08 00:38:31 -0700628 if (!info) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 rc = -ENOMEM;
630 goto bail;
Roland Stigge19f3d3a2007-05-08 00:38:31 -0700631 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632
633 default_par = info->par;
634 default_par->reg_addr = (unsigned long) ioremap(EPSON1355FB_REGS_PHYS, EPSON1355FB_REGS_LEN);
635 if (!default_par->reg_addr) {
636 printk(KERN_ERR "epson1355fb: unable to map registers\n");
637 rc = -ENOMEM;
638 goto bail;
639 }
Antonino A. Daplas4a1b9272007-07-17 04:05:36 -0700640 info->pseudo_palette = default_par->pseudo_palette;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641
642 info->screen_base = ioremap(EPSON1355FB_FB_PHYS, EPSON1355FB_FB_LEN);
643 if (!info->screen_base) {
644 printk(KERN_ERR "epson1355fb: unable to map framebuffer\n");
645 rc = -ENOMEM;
646 goto bail;
647 }
648
649 revision = epson1355_read_reg(default_par, REG_REVISION_CODE);
650 if ((revision >> 2) != 3) {
651 printk(KERN_INFO "epson1355fb: epson1355 not found\n");
652 rc = -ENODEV;
653 goto bail;
654 }
655
656 info->fix.mmio_start = EPSON1355FB_REGS_PHYS;
657 info->fix.mmio_len = EPSON1355FB_REGS_LEN;
658 info->fix.smem_start = EPSON1355FB_FB_PHYS;
659 info->fix.smem_len = get_fb_size(info);
660
661 printk(KERN_INFO "epson1355fb: regs mapped at 0x%lx, fb %d KiB mapped at 0x%p\n",
662 default_par->reg_addr, info->fix.smem_len / 1024, info->screen_base);
663
664 strcpy(info->fix.id, "S1D13505");
665 info->par = default_par;
666 info->fbops = &epson1355fb_fbops;
667 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
668
669 /* we expect the boot loader to have initialized the chip
670 with appropriate parameters from which we can determinte
671 the flavor of lcd panel attached */
672 fetch_hw_state(info, default_par);
673
674 /* turn this puppy on ... */
675 clearfb16(info);
676 backlight_enable(1);
677 lcd_enable(default_par, 1);
678
679 if (register_framebuffer(info) < 0) {
680 rc = -EINVAL;
681 goto bail;
682 }
683 /*
684 * Our driver data.
685 */
Russell King3ae5eae2005-11-09 22:32:44 +0000686 platform_set_drvdata(dev, info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687
688 printk(KERN_INFO "fb%d: %s frame buffer device\n",
689 info->node, info->fix.id);
690
691 return 0;
692
693 bail:
Russell King3ae5eae2005-11-09 22:32:44 +0000694 epson1355fb_remove(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 return rc;
696}
697
Russell King3ae5eae2005-11-09 22:32:44 +0000698static struct platform_driver epson1355fb_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699 .probe = epson1355fb_probe,
700 .remove = epson1355fb_remove,
Russell King3ae5eae2005-11-09 22:32:44 +0000701 .driver = {
702 .name = "epson1355fb",
703 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704};
705
Antonino A. Daplas673681c2006-06-26 00:26:33 -0700706static struct platform_device *epson1355fb_device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707
708int __init epson1355fb_init(void)
709{
710 int ret = 0;
711
712 if (fb_get_options("epson1355fb", NULL))
713 return -ENODEV;
714
Russell King3ae5eae2005-11-09 22:32:44 +0000715 ret = platform_driver_register(&epson1355fb_driver);
Antonino A. Daplas673681c2006-06-26 00:26:33 -0700716
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 if (!ret) {
Antonino A. Daplas673681c2006-06-26 00:26:33 -0700718 epson1355fb_device = platform_device_alloc("epson1355fb", 0);
719
720 if (epson1355fb_device)
721 ret = platform_device_add(epson1355fb_device);
722 else
723 ret = -ENOMEM;
724
725 if (ret) {
726 platform_device_put(epson1355fb_device);
Russell King3ae5eae2005-11-09 22:32:44 +0000727 platform_driver_unregister(&epson1355fb_driver);
Antonino A. Daplas673681c2006-06-26 00:26:33 -0700728 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 }
Antonino A. Daplas673681c2006-06-26 00:26:33 -0700730
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 return ret;
732}
733
734module_init(epson1355fb_init);
735
736#ifdef MODULE
737static void __exit epson1355fb_exit(void)
738{
Antonino A. Daplas673681c2006-06-26 00:26:33 -0700739 platform_device_unregister(epson1355fb_device);
Russell King3ae5eae2005-11-09 22:32:44 +0000740 platform_driver_unregister(&epson1355fb_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741}
742
743/* ------------------------------------------------------------------------- */
744
745module_exit(epson1355fb_exit);
746#endif
747
748MODULE_AUTHOR("Christopher Hoover <ch@hpl.hp.com>");
749MODULE_DESCRIPTION("Framebuffer driver for Epson S1D13505");
750MODULE_LICENSE("GPL");