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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://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> |
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 | |
63 | struct 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 | |
77 | static inline u8 epson1355_read_reg(struct epson1355_par *par, int index) |
78 | { |
79 | return __raw_readb(par->reg_addr + index); |
80 | } |
81 | |
82 | static 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 | |
105 | static 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 | |
113 | static 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 | |
122 | static 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 | |
131 | static 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 | |
144 | static 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 | */ |
164 | static 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 | */ |
208 | static 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 | |
229 | static 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) |
242 | static 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 |
253 | static 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 | */ |
275 | static 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 | |
309 | static 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 | |
319 | static 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 | |
333 | static 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 | |
364 | static 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 | |
393 | static ssize_t |
394 | epson1355fb_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 | |
417 | static ssize_t |
418 | epson1355fb_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 | |
450 | static 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 | |
464 | static __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 | |
480 | static int epson1355_width_tab[2][4] __initdata = |
481 | { {4, 8, 16, -1}, {9, 12, 16, -1} }; |
482 | static int epson1355_bpp_tab[8] __initdata = { 1, 2, 4, 8, 15, 16 }; |
483 | |
484 | static void __init 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 | |
567 | static 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 | |
581 | static 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 | |
604 | 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 | |
697 | static struct platform_driver epson1355fb_driver = { |
698 | .probe = epson1355fb_probe, |
699 | .remove = epson1355fb_remove, |
700 | .driver = { |
701 | .name = "epson1355fb", |
702 | }, |
703 | }; |
704 | |
705 | static struct platform_device *epson1355fb_device; |
706 | |
707 | int __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 | |
733 | module_init(epson1355fb_init); |
734 | |
735 | #ifdef MODULE |
736 | static void __exit epson1355fb_exit(void) |
737 | { |
738 | platform_device_unregister(epson1355fb_device); |
739 | platform_driver_unregister(&epson1355fb_driver); |
740 | } |
741 | |
742 | /* ------------------------------------------------------------------------- */ |
743 | |
744 | module_exit(epson1355fb_exit); |
745 | #endif |
746 | |
747 | MODULE_AUTHOR("Christopher Hoover <ch@hpl.hp.com>"); |
748 | MODULE_DESCRIPTION("Framebuffer driver for Epson S1D13505"); |
749 | MODULE_LICENSE("GPL"); |
750 |
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