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1da177e4 LT |
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> | |
1da177e4 LT |
51 | #include <linux/slab.h> |
52 | #include <linux/delay.h> | |
53 | #include <linux/fb.h> | |
54 | #include <linux/init.h> | |
55 | #include <linux/ioport.h> | |
d052d1be RK |
56 | #include <linux/platform_device.h> |
57 | ||
1da177e4 LT |
58 | #include <asm/types.h> |
59 | #include <asm/io.h> | |
60 | #include <asm/uaccess.h> | |
61 | ||
62 | #include <video/epson1355.h> | |
63 | ||
64 | struct epson1355_par { | |
65 | unsigned long reg_addr; | |
66 | }; | |
67 | ||
68 | /* ------------------------------------------------------------------------- */ | |
69 | ||
70 | #ifdef CONFIG_SUPERH | |
71 | ||
72 | static inline u8 epson1355_read_reg(int index) | |
73 | { | |
74 | return ctrl_inb(par.reg_addr + index); | |
75 | } | |
76 | ||
77 | static inline void epson1355_write_reg(u8 data, int index) | |
78 | { | |
79 | ctrl_outb(data, par.reg_addr + index); | |
80 | } | |
81 | ||
82 | #elif defined(CONFIG_ARM) | |
83 | ||
84 | # ifdef CONFIG_ARCH_CEIVA | |
85 | # include <asm/arch/hardware.h> | |
86 | # define EPSON1355FB_BASE_PHYS (CEIVA_PHYS_SED1355) | |
87 | # endif | |
88 | ||
89 | static inline u8 epson1355_read_reg(struct epson1355_par *par, int index) | |
90 | { | |
91 | return __raw_readb(par->reg_addr + index); | |
92 | } | |
93 | ||
94 | static inline void epson1355_write_reg(struct epson1355_par *par, u8 data, int index) | |
95 | { | |
96 | __raw_writeb(data, par->reg_addr + index); | |
97 | } | |
98 | ||
99 | #else | |
100 | # error "no architecture-specific epson1355_{read,write}_reg" | |
101 | #endif | |
102 | ||
103 | #ifndef EPSON1355FB_BASE_PHYS | |
104 | # error "EPSON1355FB_BASE_PHYS is not defined" | |
105 | #endif | |
106 | ||
107 | #define EPSON1355FB_REGS_OFS (0) | |
108 | #define EPSON1355FB_REGS_PHYS (EPSON1355FB_BASE_PHYS + EPSON1355FB_REGS_OFS) | |
109 | #define EPSON1355FB_REGS_LEN (64) | |
110 | ||
111 | #define EPSON1355FB_FB_OFS (0x00200000) | |
112 | #define EPSON1355FB_FB_PHYS (EPSON1355FB_BASE_PHYS + EPSON1355FB_FB_OFS) | |
113 | #define EPSON1355FB_FB_LEN (2 * 1024 * 1024) | |
114 | ||
115 | /* ------------------------------------------------------------------------- */ | |
116 | ||
117 | static inline u16 epson1355_read_reg16(struct epson1355_par *par, int index) | |
118 | { | |
119 | u8 lo = epson1355_read_reg(par, index); | |
120 | u8 hi = epson1355_read_reg(par, index + 1); | |
121 | ||
122 | return (hi << 8) | lo; | |
123 | } | |
124 | ||
125 | static inline void epson1355_write_reg16(struct epson1355_par *par, u16 data, int index) | |
126 | { | |
127 | u8 lo = data & 0xff; | |
128 | u8 hi = (data >> 8) & 0xff; | |
129 | ||
130 | epson1355_write_reg(par, lo, index); | |
131 | epson1355_write_reg(par, hi, index + 1); | |
132 | } | |
133 | ||
134 | static inline u32 epson1355_read_reg20(struct epson1355_par *par, int index) | |
135 | { | |
136 | u8 b0 = epson1355_read_reg(par, index); | |
137 | u8 b1 = epson1355_read_reg(par, index + 1); | |
138 | u8 b2 = epson1355_read_reg(par, index + 2); | |
139 | ||
140 | return (b2 & 0x0f) << 16 | (b1 << 8) | b0; | |
141 | } | |
142 | ||
143 | static inline void epson1355_write_reg20(struct epson1355_par *par, u32 data, int index) | |
144 | { | |
145 | u8 b0 = data & 0xff; | |
146 | u8 b1 = (data >> 8) & 0xff; | |
147 | u8 b2 = (data >> 16) & 0x0f; | |
148 | ||
149 | epson1355_write_reg(par, b0, index); | |
150 | epson1355_write_reg(par, b1, index + 1); | |
151 | epson1355_write_reg(par, b2, index + 2); | |
152 | } | |
153 | ||
154 | /* ------------------------------------------------------------------------- */ | |
155 | ||
156 | static void set_lut(struct epson1355_par *par, u8 index, u8 r, u8 g, u8 b) | |
157 | { | |
158 | epson1355_write_reg(par, index, REG_LUT_ADDR); | |
159 | epson1355_write_reg(par, r, REG_LUT_DATA); | |
160 | epson1355_write_reg(par, g, REG_LUT_DATA); | |
161 | epson1355_write_reg(par, b, REG_LUT_DATA); | |
162 | } | |
163 | ||
164 | ||
165 | /** | |
166 | * epson1355fb_setcolreg - sets a color register. | |
167 | * @regno: Which register in the CLUT we are programming | |
168 | * @red: The red value which can be up to 16 bits wide | |
169 | * @green: The green value which can be up to 16 bits wide | |
170 | * @blue: The blue value which can be up to 16 bits wide. | |
171 | * @transp: If supported the alpha value which can be up to 16 bits wide. | |
172 | * @info: frame buffer info structure | |
173 | * | |
174 | * Returns negative errno on error, or zero on success. | |
175 | */ | |
176 | static int epson1355fb_setcolreg(unsigned regno, unsigned r, unsigned g, | |
177 | unsigned b, unsigned transp, | |
178 | struct fb_info *info) | |
179 | { | |
180 | struct epson1355_par *par = info->par; | |
181 | ||
182 | if (info->var.grayscale) | |
183 | r = g = b = (19595 * r + 38470 * g + 7471 * b) >> 16; | |
184 | ||
185 | switch (info->fix.visual) { | |
186 | case FB_VISUAL_TRUECOLOR: | |
187 | if (regno >= 16) | |
188 | return -EINVAL; | |
189 | ||
190 | ((u32 *) info->pseudo_palette)[regno] = | |
191 | (r & 0xf800) | (g & 0xfc00) >> 5 | (b & 0xf800) >> 11; | |
192 | ||
193 | break; | |
194 | case FB_VISUAL_PSEUDOCOLOR: | |
195 | if (regno >= 256) | |
196 | return -EINVAL; | |
197 | ||
198 | set_lut(par, regno, r >> 8, g >> 8, b >> 8); | |
199 | ||
200 | break; | |
201 | default: | |
202 | return -ENOSYS; | |
203 | } | |
204 | return 0; | |
205 | } | |
206 | ||
207 | /* ------------------------------------------------------------------------- */ | |
208 | ||
209 | /** | |
210 | * epson1355fb_pan_display - Pans the display. | |
211 | * @var: frame buffer variable screen structure | |
212 | * @info: frame buffer structure that represents a single frame buffer | |
213 | * | |
214 | * Pan (or wrap, depending on the `vmode' field) the display using the | |
215 | * `xoffset' and `yoffset' fields of the `var' structure. | |
216 | * If the values don't fit, return -EINVAL. | |
217 | * | |
218 | * Returns negative errno on error, or zero on success. | |
219 | */ | |
220 | static int epson1355fb_pan_display(struct fb_var_screeninfo *var, | |
221 | struct fb_info *info) | |
222 | { | |
223 | struct epson1355_par *par = info->par; | |
224 | u32 start; | |
225 | ||
226 | if (var->xoffset != 0) /* not yet ... */ | |
227 | return -EINVAL; | |
228 | ||
229 | if (var->yoffset + info->var.yres > info->var.yres_virtual) | |
230 | return -EINVAL; | |
231 | ||
232 | start = (info->fix.line_length >> 1) * var->yoffset; | |
233 | ||
234 | epson1355_write_reg20(par, start, REG_SCRN1_DISP_START_ADDR0); | |
235 | ||
236 | return 0; | |
237 | } | |
238 | ||
239 | /* ------------------------------------------------------------------------- */ | |
240 | ||
241 | static void lcd_enable(struct epson1355_par *par, int enable) | |
242 | { | |
243 | u8 mode = epson1355_read_reg(par, REG_DISPLAY_MODE); | |
244 | ||
245 | if (enable) | |
246 | mode |= 1; | |
247 | else | |
248 | mode &= ~1; | |
249 | ||
250 | epson1355_write_reg(par, mode, REG_DISPLAY_MODE); | |
251 | } | |
252 | ||
253 | #if defined(CONFIG_ARCH_CEIVA) | |
254 | static void backlight_enable(int enable) | |
255 | { | |
256 | /* ### this should be protected by a spinlock ... */ | |
257 | u8 pddr = clps_readb(PDDR); | |
258 | if (enable) | |
259 | pddr |= (1 << 5); | |
260 | else | |
261 | pddr &= ~(1 << 5); | |
262 | clps_writeb(pddr, PDDR); | |
263 | } | |
264 | #else | |
265 | static void backlight_enable(int enable) | |
266 | { | |
267 | } | |
268 | #endif | |
269 | ||
270 | ||
271 | /** | |
272 | * epson1355fb_blank - blanks the display. | |
273 | * @blank_mode: the blank mode we want. | |
274 | * @info: frame buffer structure that represents a single frame buffer | |
275 | * | |
276 | * Blank the screen if blank_mode != 0, else unblank. Return 0 if | |
277 | * blanking succeeded, != 0 if un-/blanking failed due to e.g. a | |
278 | * video mode which doesn't support it. Implements VESA suspend | |
279 | * and powerdown modes on hardware that supports disabling hsync/vsync: | |
280 | * blank_mode == 2: suspend vsync | |
281 | * blank_mode == 3: suspend hsync | |
282 | * blank_mode == 4: powerdown | |
283 | * | |
284 | * Returns negative errno on error, or zero on success. | |
285 | * | |
286 | */ | |
287 | static int epson1355fb_blank(int blank_mode, struct fb_info *info) | |
288 | { | |
289 | struct epson1355_par *par = info->par; | |
290 | ||
291 | switch (blank_mode) { | |
292 | case FB_BLANK_UNBLANKING: | |
293 | case FB_BLANK_NORMAL: | |
294 | lcd_enable(par, 1); | |
295 | backlight_enable(1); | |
296 | break; | |
297 | case FB_BLANK_VSYNC_SUSPEND: | |
298 | case FB_BLANK_HSYNC_SUSPEND: | |
299 | backlight_enable(0); | |
300 | break; | |
301 | case FB_BLANK_POWERDOWN: | |
302 | backlight_enable(0); | |
303 | lcd_enable(par, 0); | |
304 | break; | |
305 | default: | |
306 | return -EINVAL; | |
307 | } | |
308 | ||
309 | /* let fbcon do a soft blank for us */ | |
310 | return (blank_mode == FB_BLANK_NORMAL) ? 1 : 0; | |
311 | } | |
312 | ||
313 | /* ------------------------------------------------------------------------- */ | |
314 | ||
315 | /* | |
316 | * We can't use the cfb generic routines, as we have to limit | |
317 | * ourselves to 16-bit or 8-bit loads and stores to this 16-bit | |
318 | * chip. | |
319 | */ | |
320 | ||
321 | static inline void epson1355fb_fb_writel(unsigned long v, unsigned long *a) | |
322 | { | |
323 | u16 *p = (u16 *) a; | |
324 | u16 l = v & 0xffff; | |
325 | u16 h = v >> 16; | |
326 | ||
327 | fb_writew(l, p); | |
328 | fb_writew(h, p + 1); | |
329 | } | |
330 | ||
331 | static inline unsigned long epson1355fb_fb_readl(const unsigned long *a) | |
332 | { | |
333 | const u16 *p = (u16 *) a; | |
334 | u16 l = fb_readw(p); | |
335 | u16 h = fb_readw(p + 1); | |
336 | ||
337 | return (h << 16) | l; | |
338 | } | |
339 | ||
340 | #define FB_READL epson1355fb_fb_readl | |
341 | #define FB_WRITEL epson1355fb_fb_writel | |
342 | ||
343 | /* ------------------------------------------------------------------------- */ | |
344 | ||
345 | static inline unsigned long copy_from_user16(void *to, const void *from, | |
346 | unsigned long n) | |
347 | { | |
348 | u16 *dst = (u16 *) to; | |
349 | u16 *src = (u16 *) from; | |
350 | ||
351 | if (!access_ok(VERIFY_READ, from, n)) | |
352 | return n; | |
353 | ||
354 | while (n > 1) { | |
355 | u16 v; | |
356 | if (__get_user(v, src)) | |
357 | return n; | |
358 | ||
359 | fb_writew(v, dst); | |
360 | ||
361 | src++, dst++; | |
362 | n -= 2; | |
363 | } | |
364 | ||
365 | if (n) { | |
366 | u8 v; | |
367 | ||
368 | if (__get_user(v, ((u8 *) src))) | |
369 | return n; | |
370 | ||
371 | fb_writeb(v, dst); | |
372 | } | |
373 | return 0; | |
374 | } | |
375 | ||
376 | static inline unsigned long copy_to_user16(void *to, const void *from, | |
377 | unsigned long n) | |
378 | { | |
379 | u16 *dst = (u16 *) to; | |
380 | u16 *src = (u16 *) from; | |
381 | ||
382 | if (!access_ok(VERIFY_WRITE, to, n)) | |
383 | return n; | |
384 | ||
385 | while (n > 1) { | |
386 | u16 v = fb_readw(src); | |
387 | ||
388 | if (__put_user(v, dst)) | |
389 | return n; | |
390 | ||
391 | src++, dst++; | |
392 | n -= 2; | |
393 | } | |
394 | ||
395 | if (n) { | |
396 | u8 v = fb_readb(src); | |
397 | ||
398 | if (__put_user(v, ((u8 *) dst))) | |
399 | return n; | |
400 | } | |
401 | return 0; | |
402 | } | |
403 | ||
404 | ||
405 | static ssize_t | |
406 | epson1355fb_read(struct file *file, char *buf, size_t count, loff_t * ppos) | |
407 | { | |
408 | struct inode *inode = file->f_dentry->d_inode; | |
409 | int fbidx = iminor(inode); | |
410 | struct fb_info *info = registered_fb[fbidx]; | |
411 | unsigned long p = *ppos; | |
412 | ||
413 | /* from fbmem.c except for our own copy_*_user */ | |
414 | if (!info || !info->screen_base) | |
415 | return -ENODEV; | |
416 | ||
417 | if (p >= info->fix.smem_len) | |
418 | return 0; | |
419 | if (count >= info->fix.smem_len) | |
420 | count = info->fix.smem_len; | |
421 | if (count + p > info->fix.smem_len) | |
422 | count = info->fix.smem_len - p; | |
423 | ||
424 | if (count) { | |
425 | char *base_addr; | |
426 | ||
427 | base_addr = info->screen_base; | |
428 | count -= copy_to_user16(buf, base_addr + p, count); | |
429 | if (!count) | |
430 | return -EFAULT; | |
431 | *ppos += count; | |
432 | } | |
433 | return count; | |
434 | } | |
435 | ||
436 | static ssize_t | |
437 | epson1355fb_write(struct file *file, const char *buf, | |
438 | size_t count, loff_t * ppos) | |
439 | { | |
440 | struct inode *inode = file->f_dentry->d_inode; | |
441 | int fbidx = iminor(inode); | |
442 | struct fb_info *info = registered_fb[fbidx]; | |
443 | unsigned long p = *ppos; | |
444 | int err; | |
445 | ||
446 | /* from fbmem.c except for our own copy_*_user */ | |
447 | if (!info || !info->screen_base) | |
448 | return -ENODEV; | |
449 | ||
450 | /* from fbmem.c except for our own copy_*_user */ | |
451 | if (p > info->fix.smem_len) | |
452 | return -ENOSPC; | |
453 | if (count >= info->fix.smem_len) | |
454 | count = info->fix.smem_len; | |
455 | err = 0; | |
456 | if (count + p > info->fix.smem_len) { | |
457 | count = info->fix.smem_len - p; | |
458 | err = -ENOSPC; | |
459 | } | |
460 | ||
461 | if (count) { | |
462 | char *base_addr; | |
463 | ||
464 | base_addr = info->screen_base; | |
465 | count -= copy_from_user16(base_addr + p, buf, count); | |
466 | *ppos += count; | |
467 | err = -EFAULT; | |
468 | } | |
469 | if (count) | |
470 | return count; | |
471 | return err; | |
472 | } | |
473 | ||
474 | /* ------------------------------------------------------------------------- */ | |
475 | ||
476 | static struct fb_ops epson1355fb_fbops = { | |
477 | .owner = THIS_MODULE, | |
478 | .fb_setcolreg = epson1355fb_setcolreg, | |
479 | .fb_pan_display = epson1355fb_pan_display, | |
480 | .fb_blank = epson1355fb_blank, | |
481 | .fb_fillrect = cfb_fillrect, | |
482 | .fb_copyarea = cfb_copyarea, | |
483 | .fb_imageblit = cfb_imageblit, | |
484 | .fb_read = epson1355fb_read, | |
485 | .fb_write = epson1355fb_write, | |
1da177e4 LT |
486 | }; |
487 | ||
488 | /* ------------------------------------------------------------------------- */ | |
489 | ||
490 | static __init unsigned int get_fb_size(struct fb_info *info) | |
491 | { | |
492 | unsigned int size = 2 * 1024 * 1024; | |
493 | char *p = info->screen_base; | |
494 | ||
495 | /* the 512k framebuffer is aliased at start + 0x80000 * n */ | |
496 | fb_writeb(1, p); | |
497 | fb_writeb(0, p + 0x80000); | |
498 | if (!fb_readb(p)) | |
499 | size = 512 * 1024; | |
500 | ||
501 | fb_writeb(0, p); | |
502 | ||
503 | return size; | |
504 | } | |
505 | ||
506 | static int epson1355_width_tab[2][4] __initdata = | |
507 | { {4, 8, 16, -1}, {9, 12, 16, -1} }; | |
508 | static int epson1355_bpp_tab[8] __initdata = { 1, 2, 4, 8, 15, 16 }; | |
509 | ||
510 | static void __init fetch_hw_state(struct fb_info *info, struct epson1355_par *par) | |
511 | { | |
512 | struct fb_var_screeninfo *var = &info->var; | |
513 | struct fb_fix_screeninfo *fix = &info->fix; | |
514 | u8 panel, display; | |
515 | u16 offset; | |
516 | u32 xres, yres; | |
517 | u32 xres_virtual, yres_virtual; | |
518 | int bpp, lcd_bpp; | |
519 | int is_color, is_dual, is_tft; | |
520 | int lcd_enabled, crt_enabled; | |
521 | ||
522 | fix->type = FB_TYPE_PACKED_PIXELS; | |
523 | ||
524 | display = epson1355_read_reg(par, REG_DISPLAY_MODE); | |
525 | bpp = epson1355_bpp_tab[(display >> 2) & 7]; | |
526 | ||
527 | switch (bpp) { | |
528 | case 8: | |
529 | fix->visual = FB_VISUAL_PSEUDOCOLOR; | |
530 | var->bits_per_pixel = 8; | |
531 | var->red.offset = var->green.offset = var->blue.offset = 0; | |
532 | var->red.length = var->green.length = var->blue.length = 8; | |
533 | break; | |
534 | case 16: | |
535 | /* 5-6-5 RGB */ | |
536 | fix->visual = FB_VISUAL_TRUECOLOR; | |
537 | var->bits_per_pixel = 16; | |
538 | var->red.offset = 11; | |
539 | var->red.length = 5; | |
540 | var->green.offset = 5; | |
541 | var->green.length = 6; | |
542 | var->blue.offset = 0; | |
543 | var->blue.length = 5; | |
544 | break; | |
545 | default: | |
546 | BUG(); | |
547 | } | |
548 | fb_alloc_cmap(&(info->cmap), 256, 0); | |
549 | ||
550 | panel = epson1355_read_reg(par, REG_PANEL_TYPE); | |
551 | is_color = (panel & 0x04) != 0; | |
552 | is_dual = (panel & 0x02) != 0; | |
553 | is_tft = (panel & 0x01) != 0; | |
554 | crt_enabled = (display & 0x02) != 0; | |
555 | lcd_enabled = (display & 0x01) != 0; | |
556 | lcd_bpp = epson1355_width_tab[is_tft][(panel >> 4) & 3]; | |
557 | ||
558 | xres = (epson1355_read_reg(par, REG_HORZ_DISP_WIDTH) + 1) * 8; | |
559 | yres = (epson1355_read_reg16(par, REG_VERT_DISP_HEIGHT0) + 1) * | |
560 | ((is_dual && !crt_enabled) ? 2 : 1); | |
561 | offset = epson1355_read_reg16(par, REG_MEM_ADDR_OFFSET0) & 0x7ff; | |
562 | xres_virtual = offset * 16 / bpp; | |
563 | yres_virtual = fix->smem_len / (offset * 2); | |
564 | ||
565 | var->xres = xres; | |
566 | var->yres = yres; | |
567 | var->xres_virtual = xres_virtual; | |
568 | var->yres_virtual = yres_virtual; | |
569 | var->xoffset = var->yoffset = 0; | |
570 | ||
571 | fix->line_length = offset * 2; | |
572 | ||
573 | fix->xpanstep = 0; /* no pan yet */ | |
574 | fix->ypanstep = 1; | |
575 | fix->ywrapstep = 0; | |
576 | fix->accel = FB_ACCEL_NONE; | |
577 | ||
578 | var->grayscale = !is_color; | |
579 | ||
580 | #ifdef DEBUG | |
581 | printk(KERN_INFO | |
582 | "epson1355fb: xres=%d, yres=%d, " | |
583 | "is_color=%d, is_dual=%d, is_tft=%d\n", | |
584 | xres, yres, is_color, is_dual, is_tft); | |
585 | printk(KERN_INFO | |
586 | "epson1355fb: bpp=%d, lcd_bpp=%d, " | |
587 | "crt_enabled=%d, lcd_enabled=%d\n", | |
588 | bpp, lcd_bpp, crt_enabled, lcd_enabled); | |
589 | #endif | |
590 | } | |
591 | ||
592 | ||
593 | static void clearfb16(struct fb_info *info) | |
594 | { | |
595 | u16 *dst = (u16 *) info->screen_base; | |
596 | unsigned long n = info->fix.smem_len; | |
597 | ||
598 | while (n > 1) { | |
599 | fb_writew(0, dst); | |
600 | dst++, n -= 2; | |
601 | } | |
602 | ||
603 | if (n) | |
604 | fb_writeb(0, dst); | |
605 | } | |
606 | ||
3ae5eaec | 607 | static int epson1355fb_remove(struct platform_device *dev) |
1da177e4 | 608 | { |
3ae5eaec | 609 | struct fb_info *info = platform_get_drvdata(dev); |
1da177e4 LT |
610 | struct epson1355_par *par = info->par; |
611 | ||
612 | backlight_enable(0); | |
613 | if (par) { | |
614 | lcd_enable(par, 0); | |
615 | if (par && par->reg_addr) | |
616 | iounmap((void *) par->reg_addr); | |
617 | } | |
618 | ||
619 | if (info) { | |
620 | fb_dealloc_cmap(&info->cmap); | |
621 | if (info->screen_base) | |
622 | iounmap(info->screen_base); | |
623 | framebuffer_release(info); | |
624 | } | |
625 | release_mem_region(EPSON1355FB_FB_PHYS, EPSON1355FB_FB_LEN); | |
626 | release_mem_region(EPSON1355FB_REGS_PHYS, EPSON1355FB_REGS_LEN); | |
627 | return 0; | |
628 | } | |
629 | ||
3ae5eaec | 630 | int __init epson1355fb_probe(struct platform_device *dev) |
1da177e4 | 631 | { |
1da177e4 LT |
632 | struct epson1355_par *default_par; |
633 | struct fb_info *info; | |
634 | u8 revision; | |
635 | int rc = 0; | |
636 | ||
637 | if (!request_mem_region(EPSON1355FB_REGS_PHYS, EPSON1355FB_REGS_LEN, "S1D13505 registers")) { | |
638 | printk(KERN_ERR "epson1355fb: unable to reserve " | |
639 | "registers at 0x%0x\n", EPSON1355FB_REGS_PHYS); | |
640 | rc = -EBUSY; | |
641 | goto bail; | |
642 | } | |
643 | ||
644 | if (!request_mem_region(EPSON1355FB_FB_PHYS, EPSON1355FB_FB_LEN, | |
645 | "S1D13505 framebuffer")) { | |
646 | printk(KERN_ERR "epson1355fb: unable to reserve " | |
647 | "framebuffer at 0x%0x\n", EPSON1355FB_FB_PHYS); | |
648 | rc = -EBUSY; | |
649 | goto bail; | |
650 | } | |
651 | ||
652 | info = framebuffer_alloc(sizeof(struct epson1355_par) + sizeof(u32) * 256, &dev->dev); | |
653 | if (!info) | |
654 | rc = -ENOMEM; | |
655 | goto bail; | |
656 | ||
657 | default_par = info->par; | |
658 | default_par->reg_addr = (unsigned long) ioremap(EPSON1355FB_REGS_PHYS, EPSON1355FB_REGS_LEN); | |
659 | if (!default_par->reg_addr) { | |
660 | printk(KERN_ERR "epson1355fb: unable to map registers\n"); | |
661 | rc = -ENOMEM; | |
662 | goto bail; | |
663 | } | |
664 | info->pseudo_palette = (void *)(default_par + 1); | |
665 | ||
666 | info->screen_base = ioremap(EPSON1355FB_FB_PHYS, EPSON1355FB_FB_LEN); | |
667 | if (!info->screen_base) { | |
668 | printk(KERN_ERR "epson1355fb: unable to map framebuffer\n"); | |
669 | rc = -ENOMEM; | |
670 | goto bail; | |
671 | } | |
672 | ||
673 | revision = epson1355_read_reg(default_par, REG_REVISION_CODE); | |
674 | if ((revision >> 2) != 3) { | |
675 | printk(KERN_INFO "epson1355fb: epson1355 not found\n"); | |
676 | rc = -ENODEV; | |
677 | goto bail; | |
678 | } | |
679 | ||
680 | info->fix.mmio_start = EPSON1355FB_REGS_PHYS; | |
681 | info->fix.mmio_len = EPSON1355FB_REGS_LEN; | |
682 | info->fix.smem_start = EPSON1355FB_FB_PHYS; | |
683 | info->fix.smem_len = get_fb_size(info); | |
684 | ||
685 | printk(KERN_INFO "epson1355fb: regs mapped at 0x%lx, fb %d KiB mapped at 0x%p\n", | |
686 | default_par->reg_addr, info->fix.smem_len / 1024, info->screen_base); | |
687 | ||
688 | strcpy(info->fix.id, "S1D13505"); | |
689 | info->par = default_par; | |
690 | info->fbops = &epson1355fb_fbops; | |
691 | info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN; | |
692 | ||
693 | /* we expect the boot loader to have initialized the chip | |
694 | with appropriate parameters from which we can determinte | |
695 | the flavor of lcd panel attached */ | |
696 | fetch_hw_state(info, default_par); | |
697 | ||
698 | /* turn this puppy on ... */ | |
699 | clearfb16(info); | |
700 | backlight_enable(1); | |
701 | lcd_enable(default_par, 1); | |
702 | ||
703 | if (register_framebuffer(info) < 0) { | |
704 | rc = -EINVAL; | |
705 | goto bail; | |
706 | } | |
707 | /* | |
708 | * Our driver data. | |
709 | */ | |
3ae5eaec | 710 | platform_set_drvdata(dev, info); |
1da177e4 LT |
711 | |
712 | printk(KERN_INFO "fb%d: %s frame buffer device\n", | |
713 | info->node, info->fix.id); | |
714 | ||
715 | return 0; | |
716 | ||
717 | bail: | |
3ae5eaec | 718 | epson1355fb_remove(dev); |
1da177e4 LT |
719 | return rc; |
720 | } | |
721 | ||
3ae5eaec | 722 | static struct platform_driver epson1355fb_driver = { |
1da177e4 LT |
723 | .probe = epson1355fb_probe, |
724 | .remove = epson1355fb_remove, | |
3ae5eaec RK |
725 | .driver = { |
726 | .name = "epson1355fb", | |
727 | }, | |
1da177e4 LT |
728 | }; |
729 | ||
673681c1 | 730 | static struct platform_device *epson1355fb_device; |
1da177e4 LT |
731 | |
732 | int __init epson1355fb_init(void) | |
733 | { | |
734 | int ret = 0; | |
735 | ||
736 | if (fb_get_options("epson1355fb", NULL)) | |
737 | return -ENODEV; | |
738 | ||
3ae5eaec | 739 | ret = platform_driver_register(&epson1355fb_driver); |
673681c1 | 740 | |
1da177e4 | 741 | if (!ret) { |
673681c1 AD |
742 | epson1355fb_device = platform_device_alloc("epson1355fb", 0); |
743 | ||
744 | if (epson1355fb_device) | |
745 | ret = platform_device_add(epson1355fb_device); | |
746 | else | |
747 | ret = -ENOMEM; | |
748 | ||
749 | if (ret) { | |
750 | platform_device_put(epson1355fb_device); | |
3ae5eaec | 751 | platform_driver_unregister(&epson1355fb_driver); |
673681c1 | 752 | } |
1da177e4 | 753 | } |
673681c1 | 754 | |
1da177e4 LT |
755 | return ret; |
756 | } | |
757 | ||
758 | module_init(epson1355fb_init); | |
759 | ||
760 | #ifdef MODULE | |
761 | static void __exit epson1355fb_exit(void) | |
762 | { | |
673681c1 | 763 | platform_device_unregister(epson1355fb_device); |
3ae5eaec | 764 | platform_driver_unregister(&epson1355fb_driver); |
1da177e4 LT |
765 | } |
766 | ||
767 | /* ------------------------------------------------------------------------- */ | |
768 | ||
769 | module_exit(epson1355fb_exit); | |
770 | #endif | |
771 | ||
772 | MODULE_AUTHOR("Christopher Hoover <ch@hpl.hp.com>"); | |
773 | MODULE_DESCRIPTION("Framebuffer driver for Epson S1D13505"); | |
774 | MODULE_LICENSE("GPL"); |