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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/slab.h> | |
52 | #include <linux/delay.h> | |
53 | #include <linux/fb.h> | |
54 | #include <linux/init.h> | |
55 | #include <linux/ioport.h> | |
56 | #include <linux/platform_device.h> | |
57 | ||
58 | #include <asm/types.h> | |
59 | #include <asm/io.h> | |
60 | #include <linux/uaccess.h> | |
61 | ||
62 | #include <video/epson1355.h> | |
63 | ||
64 | struct epson1355_par { | |
65 | unsigned long reg_addr; | |
66 | u32 pseudo_palette[16]; | |
67 | }; | |
68 | ||
69 | /* ------------------------------------------------------------------------- */ | |
70 | ||
71 | #if defined(CONFIG_ARM) | |
72 | ||
73 | # ifdef CONFIG_ARCH_CEIVA | |
74 | # include <mach/hardware.h> | |
75 | # define EPSON1355FB_BASE_PHYS (CEIVA_PHYS_SED1355) | |
76 | # endif | |
77 | ||
78 | static inline u8 epson1355_read_reg(struct epson1355_par *par, int index) | |
79 | { | |
80 | return __raw_readb(par->reg_addr + index); | |
81 | } | |
82 | ||
83 | static 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 | ||
106 | static 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 | ||
114 | static 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 | ||
123 | static 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 | ||
132 | static 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 | ||
145 | static 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 | */ | |
165 | static 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 | */ | |
209 | static 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 | ||
230 | static 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) | |
243 | static 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 | |
254 | static 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 | */ | |
276 | static int epson1355fb_blank(int blank_mode, struct fb_info *info) | |
277 | { | |
278 | struct epson1355_par *par = info->par; | |
279 | ||
280 | switch (blank_mode) { | |
281 | case FB_BLANK_UNBLANK: | |
282 | 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 | ||
310 | static 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 | ||
320 | static 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 | ||
334 | static 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 | ||
365 | static 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 | ||
394 | static ssize_t | |
395 | epson1355fb_read(struct fb_info *info, char *buf, size_t count, loff_t * ppos) | |
396 | { | |
397 | unsigned long p = *ppos; | |
398 | ||
399 | 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 | ||
418 | static ssize_t | |
419 | epson1355fb_write(struct fb_info *info, const char *buf, | |
420 | size_t count, loff_t * ppos) | |
421 | { | |
422 | unsigned long p = *ppos; | |
423 | int err; | |
424 | ||
425 | /* from fbmem.c except for our own copy_*_user */ | |
426 | 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 | ||
451 | static 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, | |
461 | }; | |
462 | ||
463 | /* ------------------------------------------------------------------------- */ | |
464 | ||
465 | static __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 | ||
481 | static int epson1355_width_tab[2][4] __initdata = | |
482 | { {4, 8, 16, -1}, {9, 12, 16, -1} }; | |
483 | static int epson1355_bpp_tab[8] __initdata = { 1, 2, 4, 8, 15, 16 }; | |
484 | ||
485 | static 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 | ||
568 | static 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 | ||
582 | static int epson1355fb_remove(struct platform_device *dev) | |
583 | { | |
584 | struct fb_info *info = platform_get_drvdata(dev); | |
585 | 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 | ||
605 | int __init epson1355fb_probe(struct platform_device *dev) | |
606 | { | |
607 | 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 | ||
627 | info = framebuffer_alloc(sizeof(struct epson1355_par), &dev->dev); | |
628 | if (!info) { | |
629 | rc = -ENOMEM; | |
630 | goto bail; | |
631 | } | |
632 | ||
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 | } | |
640 | info->pseudo_palette = default_par->pseudo_palette; | |
641 | ||
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 | */ | |
686 | platform_set_drvdata(dev, info); | |
687 | ||
688 | printk(KERN_INFO "fb%d: %s frame buffer device\n", | |
689 | info->node, info->fix.id); | |
690 | ||
691 | return 0; | |
692 | ||
693 | bail: | |
694 | epson1355fb_remove(dev); | |
695 | return rc; | |
696 | } | |
697 | ||
698 | static struct platform_driver epson1355fb_driver = { | |
699 | .probe = epson1355fb_probe, | |
700 | .remove = epson1355fb_remove, | |
701 | .driver = { | |
702 | .name = "epson1355fb", | |
703 | }, | |
704 | }; | |
705 | ||
706 | static struct platform_device *epson1355fb_device; | |
707 | ||
708 | int __init epson1355fb_init(void) | |
709 | { | |
710 | int ret = 0; | |
711 | ||
712 | if (fb_get_options("epson1355fb", NULL)) | |
713 | return -ENODEV; | |
714 | ||
715 | ret = platform_driver_register(&epson1355fb_driver); | |
716 | ||
717 | if (!ret) { | |
718 | 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); | |
727 | platform_driver_unregister(&epson1355fb_driver); | |
728 | } | |
729 | } | |
730 | ||
731 | return ret; | |
732 | } | |
733 | ||
734 | module_init(epson1355fb_init); | |
735 | ||
736 | #ifdef MODULE | |
737 | static void __exit epson1355fb_exit(void) | |
738 | { | |
739 | platform_device_unregister(epson1355fb_device); | |
740 | platform_driver_unregister(&epson1355fb_driver); | |
741 | } | |
742 | ||
743 | /* ------------------------------------------------------------------------- */ | |
744 | ||
745 | module_exit(epson1355fb_exit); | |
746 | #endif | |
747 | ||
748 | MODULE_AUTHOR("Christopher Hoover <ch@hpl.hp.com>"); | |
749 | MODULE_DESCRIPTION("Framebuffer driver for Epson S1D13505"); | |
750 | MODULE_LICENSE("GPL"); |