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1 | /* linux/drivers/video/sm501fb.c |
2 | * | |
3 | * Copyright (c) 2006 Simtec Electronics | |
4 | * Vincent Sanders <vince@simtec.co.uk> | |
5 | * Ben Dooks <ben@simtec.co.uk> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * Framebuffer driver for the Silicon Motion SM501 | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/errno.h> | |
17 | #include <linux/string.h> | |
18 | #include <linux/mm.h> | |
19 | #include <linux/tty.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/delay.h> | |
22 | #include <linux/fb.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/vmalloc.h> | |
25 | #include <linux/dma-mapping.h> | |
26 | #include <linux/interrupt.h> | |
27 | #include <linux/workqueue.h> | |
28 | #include <linux/wait.h> | |
29 | #include <linux/platform_device.h> | |
30 | #include <linux/clk.h> | |
31 | ||
32 | #include <asm/io.h> | |
33 | #include <asm/uaccess.h> | |
34 | #include <asm/div64.h> | |
35 | ||
36 | #ifdef CONFIG_PM | |
37 | #include <linux/pm.h> | |
38 | #endif | |
39 | ||
40 | #include <linux/sm501.h> | |
41 | #include <linux/sm501-regs.h> | |
42 | ||
43 | #define NR_PALETTE 256 | |
44 | ||
45 | enum sm501_controller { | |
46 | HEAD_CRT = 0, | |
47 | HEAD_PANEL = 1, | |
48 | }; | |
49 | ||
50 | /* SM501 memory adress */ | |
51 | struct sm501_mem { | |
52 | unsigned long size; | |
53 | unsigned long sm_addr; | |
54 | void __iomem *k_addr; | |
55 | }; | |
56 | ||
57 | /* private data that is shared between all frambuffers* */ | |
58 | struct sm501fb_info { | |
59 | struct device *dev; | |
60 | struct fb_info *fb[2]; /* fb info for both heads */ | |
61 | struct resource *fbmem_res; /* framebuffer resource */ | |
62 | struct resource *regs_res; /* registers resource */ | |
63 | struct sm501_platdata_fb *pdata; /* our platform data */ | |
64 | ||
65 | int irq; | |
66 | int swap_endian; /* set to swap rgb=>bgr */ | |
67 | void __iomem *regs; /* remapped registers */ | |
68 | void __iomem *fbmem; /* remapped framebuffer */ | |
69 | size_t fbmem_len; /* length of remapped region */ | |
70 | }; | |
71 | ||
72 | /* per-framebuffer private data */ | |
73 | struct sm501fb_par { | |
74 | u32 pseudo_palette[16]; | |
75 | ||
76 | enum sm501_controller head; | |
77 | struct sm501_mem cursor; | |
78 | struct sm501_mem screen; | |
79 | struct fb_ops ops; | |
80 | ||
81 | void *store_fb; | |
82 | void *store_cursor; | |
83 | void __iomem *cursor_regs; | |
84 | struct sm501fb_info *info; | |
85 | }; | |
86 | ||
87 | /* Helper functions */ | |
88 | ||
89 | static inline int h_total(struct fb_var_screeninfo *var) | |
90 | { | |
91 | return var->xres + var->left_margin + | |
92 | var->right_margin + var->hsync_len; | |
93 | } | |
94 | ||
95 | static inline int v_total(struct fb_var_screeninfo *var) | |
96 | { | |
97 | return var->yres + var->upper_margin + | |
98 | var->lower_margin + var->vsync_len; | |
99 | } | |
100 | ||
101 | /* sm501fb_sync_regs() | |
102 | * | |
103 | * This call is mainly for PCI bus systems where we need to | |
104 | * ensure that any writes to the bus are completed before the | |
105 | * next phase, or after completing a function. | |
106 | */ | |
107 | ||
108 | static inline void sm501fb_sync_regs(struct sm501fb_info *info) | |
109 | { | |
110 | readl(info->regs); | |
111 | } | |
112 | ||
113 | /* sm501_alloc_mem | |
114 | * | |
115 | * This is an attempt to lay out memory for the two framebuffers and | |
116 | * everything else | |
117 | * | |
118 | * |fbmem_res->start fbmem_res->end| | |
119 | * | | | |
120 | * |fb[0].fix.smem_start | |fb[1].fix.smem_start | 2K | | |
121 | * |-> fb[0].fix.smem_len <-| spare |-> fb[1].fix.smem_len <-|-> cursors <-| | |
122 | * | |
123 | * The "spare" space is for the 2d engine data | |
124 | * the fixed is space for the cursors (2x1Kbyte) | |
125 | * | |
126 | * we need to allocate memory for the 2D acceleration engine | |
127 | * command list and the data for the engine to deal with. | |
128 | * | |
129 | * - all allocations must be 128bit aligned | |
130 | * - cursors are 64x64x2 bits (1Kbyte) | |
131 | * | |
132 | */ | |
133 | ||
134 | #define SM501_MEMF_CURSOR (1) | |
135 | #define SM501_MEMF_PANEL (2) | |
136 | #define SM501_MEMF_CRT (4) | |
137 | #define SM501_MEMF_ACCEL (8) | |
138 | ||
139 | int sm501_alloc_mem(struct sm501fb_info *inf, struct sm501_mem *mem, | |
140 | unsigned int why, size_t size) | |
141 | { | |
142 | unsigned int ptr = 0; | |
143 | ||
144 | switch (why) { | |
145 | case SM501_MEMF_CURSOR: | |
146 | ptr = inf->fbmem_len - size; | |
147 | inf->fbmem_len = ptr; | |
148 | break; | |
149 | ||
150 | case SM501_MEMF_PANEL: | |
151 | ptr = inf->fbmem_len - size; | |
152 | if (ptr < inf->fb[0]->fix.smem_len) | |
153 | return -ENOMEM; | |
154 | ||
155 | break; | |
156 | ||
157 | case SM501_MEMF_CRT: | |
158 | ptr = 0; | |
159 | break; | |
160 | ||
161 | case SM501_MEMF_ACCEL: | |
162 | ptr = inf->fb[0]->fix.smem_len; | |
163 | ||
164 | if ((ptr + size) > | |
165 | (inf->fb[1]->fix.smem_start - inf->fbmem_res->start)) | |
166 | return -ENOMEM; | |
167 | break; | |
168 | ||
169 | default: | |
170 | return -EINVAL; | |
171 | } | |
172 | ||
173 | mem->size = size; | |
174 | mem->sm_addr = ptr; | |
175 | mem->k_addr = inf->fbmem + ptr; | |
176 | ||
177 | dev_dbg(inf->dev, "%s: result %08lx, %p - %u, %zd\n", | |
178 | __func__, mem->sm_addr, mem->k_addr, why, size); | |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
183 | /* sm501fb_ps_to_hz | |
184 | * | |
185 | * Converts a period in picoseconds to Hz. | |
186 | * | |
187 | * Note, we try to keep this in Hz to minimise rounding with | |
188 | * the limited PLL settings on the SM501. | |
189 | */ | |
190 | ||
191 | static unsigned long sm501fb_ps_to_hz(unsigned long psvalue) | |
192 | { | |
193 | unsigned long long numerator=1000000000000ULL; | |
194 | ||
195 | /* 10^12 / picosecond period gives frequency in Hz */ | |
196 | do_div(numerator, psvalue); | |
197 | return (unsigned long)numerator; | |
198 | } | |
199 | ||
200 | /* sm501fb_hz_to_ps is identical to the oposite transform */ | |
201 | ||
202 | #define sm501fb_hz_to_ps(x) sm501fb_ps_to_hz(x) | |
203 | ||
204 | /* sm501fb_setup_gamma | |
205 | * | |
206 | * Programs a linear 1.0 gamma ramp in case the gamma | |
207 | * correction is enabled without programming anything else. | |
208 | */ | |
209 | ||
210 | static void sm501fb_setup_gamma(struct sm501fb_info *fbi, | |
211 | unsigned long palette) | |
212 | { | |
213 | unsigned long value = 0; | |
214 | int offset; | |
215 | ||
216 | /* set gamma values */ | |
217 | for (offset = 0; offset < 256 * 4; offset += 4) { | |
218 | writel(value, fbi->regs + palette + offset); | |
219 | value += 0x010101; /* Advance RGB by 1,1,1.*/ | |
220 | } | |
221 | } | |
222 | ||
223 | /* sm501fb_check_var | |
224 | * | |
225 | * check common variables for both panel and crt | |
226 | */ | |
227 | ||
228 | static int sm501fb_check_var(struct fb_var_screeninfo *var, | |
229 | struct fb_info *info) | |
230 | { | |
231 | struct sm501fb_par *par = info->par; | |
232 | struct sm501fb_info *sm = par->info; | |
233 | unsigned long tmp; | |
234 | ||
235 | /* check we can fit these values into the registers */ | |
236 | ||
237 | if (var->hsync_len > 255 || var->vsync_len > 255) | |
238 | return -EINVAL; | |
239 | ||
240 | if ((var->xres + var->right_margin) >= 4096) | |
241 | return -EINVAL; | |
242 | ||
243 | if ((var->yres + var->lower_margin) > 2048) | |
244 | return -EINVAL; | |
245 | ||
246 | /* hard limits of device */ | |
247 | ||
248 | if (h_total(var) > 4096 || v_total(var) > 2048) | |
249 | return -EINVAL; | |
250 | ||
251 | /* check our line length is going to be 128 bit aligned */ | |
252 | ||
253 | tmp = (var->xres * var->bits_per_pixel) / 8; | |
254 | if ((tmp & 15) != 0) | |
255 | return -EINVAL; | |
256 | ||
257 | /* check the virtual size */ | |
258 | ||
259 | if (var->xres_virtual > 4096 || var->yres_virtual > 2048) | |
260 | return -EINVAL; | |
261 | ||
262 | /* can cope with 8,16 or 32bpp */ | |
263 | ||
264 | if (var->bits_per_pixel <= 8) | |
265 | var->bits_per_pixel = 8; | |
266 | else if (var->bits_per_pixel <= 16) | |
267 | var->bits_per_pixel = 16; | |
268 | else if (var->bits_per_pixel == 24) | |
269 | var->bits_per_pixel = 32; | |
270 | ||
271 | /* set r/g/b positions and validate bpp */ | |
272 | switch(var->bits_per_pixel) { | |
273 | case 8: | |
274 | var->red.length = var->bits_per_pixel; | |
275 | var->red.offset = 0; | |
276 | var->green.length = var->bits_per_pixel; | |
277 | var->green.offset = 0; | |
278 | var->blue.length = var->bits_per_pixel; | |
279 | var->blue.offset = 0; | |
280 | var->transp.length = 0; | |
281 | ||
282 | break; | |
283 | ||
284 | case 16: | |
285 | if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) { | |
286 | var->red.offset = 11; | |
287 | var->green.offset = 5; | |
288 | var->blue.offset = 0; | |
289 | } else { | |
290 | var->blue.offset = 11; | |
291 | var->green.offset = 5; | |
292 | var->red.offset = 0; | |
293 | } | |
294 | ||
295 | var->red.length = 5; | |
296 | var->green.length = 6; | |
297 | var->blue.length = 5; | |
298 | var->transp.length = 0; | |
299 | break; | |
300 | ||
301 | case 32: | |
302 | if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) { | |
303 | var->transp.offset = 0; | |
304 | var->red.offset = 8; | |
305 | var->green.offset = 16; | |
306 | var->blue.offset = 24; | |
307 | } else { | |
308 | var->transp.offset = 24; | |
309 | var->red.offset = 16; | |
310 | var->green.offset = 8; | |
311 | var->blue.offset = 0; | |
312 | } | |
313 | ||
314 | var->red.length = 8; | |
315 | var->green.length = 8; | |
316 | var->blue.length = 8; | |
317 | var->transp.length = 0; | |
318 | break; | |
319 | ||
320 | default: | |
321 | return -EINVAL; | |
322 | } | |
323 | ||
324 | return 0; | |
325 | } | |
326 | ||
327 | /* | |
328 | * sm501fb_check_var_crt(): | |
329 | * | |
330 | * check the parameters for the CRT head, and either bring them | |
331 | * back into range, or return -EINVAL. | |
332 | */ | |
333 | ||
334 | static int sm501fb_check_var_crt(struct fb_var_screeninfo *var, | |
335 | struct fb_info *info) | |
336 | { | |
337 | return sm501fb_check_var(var, info); | |
338 | } | |
339 | ||
340 | /* sm501fb_check_var_pnl(): | |
341 | * | |
342 | * check the parameters for the CRT head, and either bring them | |
343 | * back into range, or return -EINVAL. | |
344 | */ | |
345 | ||
346 | static int sm501fb_check_var_pnl(struct fb_var_screeninfo *var, | |
347 | struct fb_info *info) | |
348 | { | |
349 | return sm501fb_check_var(var, info); | |
350 | } | |
351 | ||
352 | /* sm501fb_set_par_common | |
353 | * | |
354 | * set common registers for framebuffers | |
355 | */ | |
356 | ||
357 | static int sm501fb_set_par_common(struct fb_info *info, | |
358 | struct fb_var_screeninfo *var) | |
359 | { | |
360 | struct sm501fb_par *par = info->par; | |
361 | struct sm501fb_info *fbi = par->info; | |
362 | unsigned long pixclock; /* pixelclock in Hz */ | |
363 | unsigned long sm501pixclock; /* pixelclock the 501 can achive in Hz */ | |
364 | unsigned int mem_type; | |
365 | unsigned int clock_type; | |
366 | unsigned int head_addr; | |
367 | ||
368 | dev_dbg(fbi->dev, "%s: %dx%d, bpp = %d, virtual %dx%d\n", | |
369 | __func__, var->xres, var->yres, var->bits_per_pixel, | |
370 | var->xres_virtual, var->yres_virtual); | |
371 | ||
372 | switch (par->head) { | |
373 | case HEAD_CRT: | |
374 | mem_type = SM501_MEMF_CRT; | |
375 | clock_type = SM501_CLOCK_V2XCLK; | |
376 | head_addr = SM501_DC_CRT_FB_ADDR; | |
377 | break; | |
378 | ||
379 | case HEAD_PANEL: | |
380 | mem_type = SM501_MEMF_PANEL; | |
381 | clock_type = SM501_CLOCK_P2XCLK; | |
382 | head_addr = SM501_DC_PANEL_FB_ADDR; | |
383 | break; | |
384 | ||
385 | default: | |
386 | mem_type = 0; /* stop compiler warnings */ | |
387 | head_addr = 0; | |
388 | clock_type = 0; | |
389 | } | |
390 | ||
391 | switch (var->bits_per_pixel) { | |
392 | case 8: | |
393 | info->fix.visual = FB_VISUAL_PSEUDOCOLOR; | |
394 | break; | |
395 | ||
396 | case 16: | |
397 | info->fix.visual = FB_VISUAL_DIRECTCOLOR; | |
398 | break; | |
399 | ||
400 | case 32: | |
401 | info->fix.visual = FB_VISUAL_TRUECOLOR; | |
402 | break; | |
403 | } | |
404 | ||
405 | /* allocate fb memory within 501 */ | |
406 | info->fix.line_length = (var->xres_virtual * var->bits_per_pixel)/8; | |
407 | info->fix.smem_len = info->fix.line_length * var->yres_virtual; | |
408 | ||
409 | dev_dbg(fbi->dev, "%s: line length = %u\n", __func__, | |
410 | info->fix.line_length); | |
411 | ||
412 | if (sm501_alloc_mem(fbi, &par->screen, mem_type, | |
413 | info->fix.smem_len)) { | |
414 | dev_err(fbi->dev, "no memory available\n"); | |
415 | return -ENOMEM; | |
416 | } | |
417 | ||
418 | info->fix.smem_start = fbi->fbmem_res->start + par->screen.sm_addr; | |
419 | ||
420 | info->screen_base = fbi->fbmem + par->screen.sm_addr; | |
421 | info->screen_size = info->fix.smem_len; | |
422 | ||
423 | /* set start of framebuffer to the screen */ | |
424 | ||
425 | writel(par->screen.sm_addr | SM501_ADDR_FLIP, fbi->regs + head_addr); | |
426 | ||
427 | /* program CRT clock */ | |
428 | ||
429 | pixclock = sm501fb_ps_to_hz(var->pixclock); | |
430 | ||
431 | sm501pixclock = sm501_set_clock(fbi->dev->parent, clock_type, | |
432 | pixclock); | |
433 | ||
434 | /* update fb layer with actual clock used */ | |
435 | var->pixclock = sm501fb_hz_to_ps(sm501pixclock); | |
436 | ||
437 | dev_dbg(fbi->dev, "%s: pixclock(ps) = %u, pixclock(Hz) = %lu, " | |
438 | "sm501pixclock = %lu, error = %ld%%\n", | |
439 | __func__, var->pixclock, pixclock, sm501pixclock, | |
440 | ((pixclock - sm501pixclock)*100)/pixclock); | |
441 | ||
442 | return 0; | |
443 | } | |
444 | ||
445 | /* sm501fb_set_par_geometry | |
446 | * | |
447 | * set the geometry registers for specified framebuffer. | |
448 | */ | |
449 | ||
450 | static void sm501fb_set_par_geometry(struct fb_info *info, | |
451 | struct fb_var_screeninfo *var) | |
452 | { | |
453 | struct sm501fb_par *par = info->par; | |
454 | struct sm501fb_info *fbi = par->info; | |
455 | void __iomem *base = fbi->regs; | |
456 | unsigned long reg; | |
457 | ||
458 | if (par->head == HEAD_CRT) | |
459 | base += SM501_DC_CRT_H_TOT; | |
460 | else | |
461 | base += SM501_DC_PANEL_H_TOT; | |
462 | ||
463 | /* set framebuffer width and display width */ | |
464 | ||
465 | reg = info->fix.line_length; | |
466 | reg |= ((var->xres * var->bits_per_pixel)/8) << 16; | |
467 | ||
468 | writel(reg, fbi->regs + (par->head == HEAD_CRT ? | |
469 | SM501_DC_CRT_FB_OFFSET : SM501_DC_PANEL_FB_OFFSET)); | |
470 | ||
471 | /* program horizontal total */ | |
472 | ||
473 | reg = (h_total(var) - 1) << 16; | |
474 | reg |= (var->xres - 1); | |
475 | ||
476 | writel(reg, base + SM501_OFF_DC_H_TOT); | |
477 | ||
478 | /* program horizontal sync */ | |
479 | ||
480 | reg = var->hsync_len << 16; | |
481 | reg |= var->xres + var->right_margin - 1; | |
482 | ||
483 | writel(reg, base + SM501_OFF_DC_H_SYNC); | |
484 | ||
485 | /* program vertical total */ | |
486 | ||
487 | reg = (v_total(var) - 1) << 16; | |
488 | reg |= (var->yres - 1); | |
489 | ||
490 | writel(reg, base + SM501_OFF_DC_V_TOT); | |
491 | ||
492 | /* program vertical sync */ | |
493 | reg = var->vsync_len << 16; | |
494 | reg |= var->yres + var->lower_margin - 1; | |
495 | ||
496 | writel(reg, base + SM501_OFF_DC_V_SYNC); | |
497 | } | |
498 | ||
499 | /* sm501fb_pan_crt | |
500 | * | |
501 | * pan the CRT display output within an virtual framebuffer | |
502 | */ | |
503 | ||
504 | static int sm501fb_pan_crt(struct fb_var_screeninfo *var, | |
505 | struct fb_info *info) | |
506 | { | |
507 | struct sm501fb_par *par = info->par; | |
508 | struct sm501fb_info *fbi = par->info; | |
509 | unsigned int bytes_pixel = var->bits_per_pixel / 8; | |
510 | unsigned long reg; | |
511 | unsigned long xoffs; | |
512 | ||
513 | xoffs = var->xoffset * bytes_pixel; | |
514 | ||
515 | reg = readl(fbi->regs + SM501_DC_CRT_CONTROL); | |
516 | ||
517 | reg &= ~SM501_DC_CRT_CONTROL_PIXEL_MASK; | |
518 | reg |= ((xoffs & 15) / bytes_pixel) << 4; | |
519 | writel(reg, fbi->regs + SM501_DC_CRT_CONTROL); | |
520 | ||
521 | reg = (par->screen.sm_addr + xoffs + | |
522 | var->yoffset * info->fix.line_length); | |
523 | writel(reg | SM501_ADDR_FLIP, fbi->regs + SM501_DC_CRT_FB_ADDR); | |
524 | ||
525 | sm501fb_sync_regs(fbi); | |
526 | return 0; | |
527 | } | |
528 | ||
529 | /* sm501fb_pan_pnl | |
530 | * | |
531 | * pan the panel display output within an virtual framebuffer | |
532 | */ | |
533 | ||
534 | static int sm501fb_pan_pnl(struct fb_var_screeninfo *var, | |
535 | struct fb_info *info) | |
536 | { | |
537 | struct sm501fb_par *par = info->par; | |
538 | struct sm501fb_info *fbi = par->info; | |
539 | unsigned long reg; | |
540 | ||
541 | reg = var->xoffset | (var->xres_virtual << 16); | |
542 | writel(reg, fbi->regs + SM501_DC_PANEL_FB_WIDTH); | |
543 | ||
544 | reg = var->yoffset | (var->yres_virtual << 16); | |
545 | writel(reg, fbi->regs + SM501_DC_PANEL_FB_HEIGHT); | |
546 | ||
547 | sm501fb_sync_regs(fbi); | |
548 | return 0; | |
549 | } | |
550 | ||
551 | /* sm501fb_set_par_crt | |
552 | * | |
553 | * Set the CRT video mode from the fb_info structure | |
554 | */ | |
555 | ||
556 | static int sm501fb_set_par_crt(struct fb_info *info) | |
557 | { | |
558 | struct sm501fb_par *par = info->par; | |
559 | struct sm501fb_info *fbi = par->info; | |
560 | struct fb_var_screeninfo *var = &info->var; | |
561 | unsigned long control; /* control register */ | |
562 | int ret; | |
563 | ||
564 | /* activate new configuration */ | |
565 | ||
566 | dev_dbg(fbi->dev, "%s(%p)\n", __func__, info); | |
567 | ||
568 | /* enable CRT DAC - note 0 is on!*/ | |
569 | sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER); | |
570 | ||
571 | control = readl(fbi->regs + SM501_DC_CRT_CONTROL); | |
572 | ||
573 | control &= (SM501_DC_CRT_CONTROL_PIXEL_MASK | | |
574 | SM501_DC_CRT_CONTROL_GAMMA | | |
575 | SM501_DC_CRT_CONTROL_BLANK | | |
576 | SM501_DC_CRT_CONTROL_SEL | | |
577 | SM501_DC_CRT_CONTROL_CP | | |
578 | SM501_DC_CRT_CONTROL_TVP); | |
579 | ||
580 | /* set the sync polarities before we check data source */ | |
581 | ||
582 | if ((var->sync & FB_SYNC_HOR_HIGH_ACT) == 0) | |
583 | control |= SM501_DC_CRT_CONTROL_HSP; | |
584 | ||
585 | if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0) | |
586 | control |= SM501_DC_CRT_CONTROL_VSP; | |
587 | ||
588 | if ((control & SM501_DC_CRT_CONTROL_SEL) == 0) { | |
589 | /* the head is displaying panel data... */ | |
590 | ||
591 | sm501_alloc_mem(fbi, &par->screen, SM501_MEMF_CRT, 0); | |
592 | goto out_update; | |
593 | } | |
594 | ||
595 | ret = sm501fb_set_par_common(info, var); | |
596 | if (ret) { | |
597 | dev_err(fbi->dev, "failed to set common parameters\n"); | |
598 | return ret; | |
599 | } | |
600 | ||
601 | sm501fb_pan_crt(var, info); | |
602 | sm501fb_set_par_geometry(info, var); | |
603 | ||
604 | control |= SM501_FIFO_3; /* fill if >3 free slots */ | |
605 | ||
606 | switch(var->bits_per_pixel) { | |
607 | case 8: | |
608 | control |= SM501_DC_CRT_CONTROL_8BPP; | |
609 | break; | |
610 | ||
611 | case 16: | |
612 | control |= SM501_DC_CRT_CONTROL_16BPP; | |
613 | break; | |
614 | ||
615 | case 32: | |
616 | control |= SM501_DC_CRT_CONTROL_32BPP; | |
617 | sm501fb_setup_gamma(fbi, SM501_DC_CRT_PALETTE); | |
618 | break; | |
619 | ||
620 | default: | |
621 | BUG(); | |
622 | } | |
623 | ||
624 | control |= SM501_DC_CRT_CONTROL_SEL; /* CRT displays CRT data */ | |
625 | control |= SM501_DC_CRT_CONTROL_TE; /* enable CRT timing */ | |
626 | control |= SM501_DC_CRT_CONTROL_ENABLE; /* enable CRT plane */ | |
627 | ||
628 | out_update: | |
629 | dev_dbg(fbi->dev, "new control is %08lx\n", control); | |
630 | ||
631 | writel(control, fbi->regs + SM501_DC_CRT_CONTROL); | |
632 | sm501fb_sync_regs(fbi); | |
633 | ||
634 | return 0; | |
635 | } | |
636 | ||
637 | static void sm501fb_panel_power(struct sm501fb_info *fbi, int to) | |
638 | { | |
639 | unsigned long control; | |
640 | void __iomem *ctrl_reg = fbi->regs + SM501_DC_PANEL_CONTROL; | |
641 | ||
642 | control = readl(ctrl_reg); | |
643 | ||
644 | if (to && (control & SM501_DC_PANEL_CONTROL_VDD) == 0) { | |
645 | /* enable panel power */ | |
646 | ||
647 | control |= SM501_DC_PANEL_CONTROL_VDD; /* FPVDDEN */ | |
648 | writel(control, ctrl_reg); | |
649 | sm501fb_sync_regs(fbi); | |
650 | mdelay(10); | |
651 | ||
652 | control |= SM501_DC_PANEL_CONTROL_DATA; /* DATA */ | |
653 | writel(control, ctrl_reg); | |
654 | sm501fb_sync_regs(fbi); | |
655 | mdelay(10); | |
656 | ||
657 | control |= SM501_DC_PANEL_CONTROL_BIAS; /* VBIASEN */ | |
658 | writel(control, ctrl_reg); | |
659 | sm501fb_sync_regs(fbi); | |
660 | mdelay(10); | |
661 | ||
662 | control |= SM501_DC_PANEL_CONTROL_FPEN; | |
663 | writel(control, ctrl_reg); | |
664 | ||
665 | } else if (!to && (control & SM501_DC_PANEL_CONTROL_VDD) != 0) { | |
666 | /* disable panel power */ | |
667 | ||
668 | control &= ~SM501_DC_PANEL_CONTROL_FPEN; | |
669 | writel(control, ctrl_reg); | |
670 | sm501fb_sync_regs(fbi); | |
671 | mdelay(10); | |
672 | ||
673 | control &= ~SM501_DC_PANEL_CONTROL_BIAS; | |
674 | writel(control, ctrl_reg); | |
675 | sm501fb_sync_regs(fbi); | |
676 | mdelay(10); | |
677 | ||
678 | control &= ~SM501_DC_PANEL_CONTROL_DATA; | |
679 | writel(control, ctrl_reg); | |
680 | sm501fb_sync_regs(fbi); | |
681 | mdelay(10); | |
682 | ||
683 | control &= ~SM501_DC_PANEL_CONTROL_VDD; | |
684 | writel(control, ctrl_reg); | |
685 | sm501fb_sync_regs(fbi); | |
686 | mdelay(10); | |
687 | } | |
688 | ||
689 | sm501fb_sync_regs(fbi); | |
690 | } | |
691 | ||
692 | /* sm501fb_set_par_pnl | |
693 | * | |
694 | * Set the panel video mode from the fb_info structure | |
695 | */ | |
696 | ||
697 | static int sm501fb_set_par_pnl(struct fb_info *info) | |
698 | { | |
699 | struct sm501fb_par *par = info->par; | |
700 | struct sm501fb_info *fbi = par->info; | |
701 | struct fb_var_screeninfo *var = &info->var; | |
702 | unsigned long control; | |
703 | unsigned long reg; | |
704 | int ret; | |
705 | ||
706 | dev_dbg(fbi->dev, "%s(%p)\n", __func__, info); | |
707 | ||
708 | /* activate this new configuration */ | |
709 | ||
710 | ret = sm501fb_set_par_common(info, var); | |
711 | if (ret) | |
712 | return ret; | |
713 | ||
714 | sm501fb_pan_pnl(var, info); | |
715 | sm501fb_set_par_geometry(info, var); | |
716 | ||
717 | /* update control register */ | |
718 | ||
719 | control = readl(fbi->regs + SM501_DC_PANEL_CONTROL); | |
720 | control &= (SM501_DC_PANEL_CONTROL_GAMMA | | |
721 | SM501_DC_PANEL_CONTROL_VDD | | |
722 | SM501_DC_PANEL_CONTROL_DATA | | |
723 | SM501_DC_PANEL_CONTROL_BIAS | | |
724 | SM501_DC_PANEL_CONTROL_FPEN | | |
725 | SM501_DC_PANEL_CONTROL_CP | | |
726 | SM501_DC_PANEL_CONTROL_CK | | |
727 | SM501_DC_PANEL_CONTROL_HP | | |
728 | SM501_DC_PANEL_CONTROL_VP | | |
729 | SM501_DC_PANEL_CONTROL_HPD | | |
730 | SM501_DC_PANEL_CONTROL_VPD); | |
731 | ||
732 | control |= SM501_FIFO_3; /* fill if >3 free slots */ | |
733 | ||
734 | switch(var->bits_per_pixel) { | |
735 | case 8: | |
736 | control |= SM501_DC_PANEL_CONTROL_8BPP; | |
737 | break; | |
738 | ||
739 | case 16: | |
740 | control |= SM501_DC_PANEL_CONTROL_16BPP; | |
741 | break; | |
742 | ||
743 | case 32: | |
744 | control |= SM501_DC_PANEL_CONTROL_32BPP; | |
745 | sm501fb_setup_gamma(fbi, SM501_DC_PANEL_PALETTE); | |
746 | break; | |
747 | ||
748 | default: | |
749 | BUG(); | |
750 | } | |
751 | ||
752 | writel(0x0, fbi->regs + SM501_DC_PANEL_PANNING_CONTROL); | |
753 | ||
754 | /* panel plane top left and bottom right location */ | |
755 | ||
756 | writel(0x00, fbi->regs + SM501_DC_PANEL_TL_LOC); | |
757 | ||
758 | reg = var->xres - 1; | |
759 | reg |= (var->yres - 1) << 16; | |
760 | ||
761 | writel(reg, fbi->regs + SM501_DC_PANEL_BR_LOC); | |
762 | ||
763 | /* program panel control register */ | |
764 | ||
765 | control |= SM501_DC_PANEL_CONTROL_TE; /* enable PANEL timing */ | |
766 | control |= SM501_DC_PANEL_CONTROL_EN; /* enable PANEL gfx plane */ | |
767 | ||
768 | if ((var->sync & FB_SYNC_HOR_HIGH_ACT) == 0) | |
769 | control |= SM501_DC_PANEL_CONTROL_HSP; | |
770 | ||
771 | if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0) | |
772 | control |= SM501_DC_PANEL_CONTROL_VSP; | |
773 | ||
774 | writel(control, fbi->regs + SM501_DC_PANEL_CONTROL); | |
775 | sm501fb_sync_regs(fbi); | |
776 | ||
777 | /* power the panel up */ | |
778 | sm501fb_panel_power(fbi, 1); | |
779 | return 0; | |
780 | } | |
781 | ||
782 | ||
783 | /* chan_to_field | |
784 | * | |
785 | * convert a colour value into a field position | |
786 | * | |
787 | * from pxafb.c | |
788 | */ | |
789 | ||
790 | static inline unsigned int chan_to_field(unsigned int chan, | |
791 | struct fb_bitfield *bf) | |
792 | { | |
793 | chan &= 0xffff; | |
794 | chan >>= 16 - bf->length; | |
795 | return chan << bf->offset; | |
796 | } | |
797 | ||
798 | /* sm501fb_setcolreg | |
799 | * | |
800 | * set the colour mapping for modes that support palettised data | |
801 | */ | |
802 | ||
803 | static int sm501fb_setcolreg(unsigned regno, | |
804 | unsigned red, unsigned green, unsigned blue, | |
805 | unsigned transp, struct fb_info *info) | |
806 | { | |
807 | struct sm501fb_par *par = info->par; | |
808 | struct sm501fb_info *fbi = par->info; | |
809 | void __iomem *base = fbi->regs; | |
810 | unsigned int val; | |
811 | ||
812 | if (par->head == HEAD_CRT) | |
813 | base += SM501_DC_CRT_PALETTE; | |
814 | else | |
815 | base += SM501_DC_PANEL_PALETTE; | |
816 | ||
817 | switch (info->fix.visual) { | |
818 | case FB_VISUAL_TRUECOLOR: | |
819 | /* true-colour, use pseuo-palette */ | |
820 | ||
821 | if (regno < 16) { | |
822 | u32 *pal = par->pseudo_palette; | |
823 | ||
824 | val = chan_to_field(red, &info->var.red); | |
825 | val |= chan_to_field(green, &info->var.green); | |
826 | val |= chan_to_field(blue, &info->var.blue); | |
827 | ||
828 | pal[regno] = val; | |
829 | } | |
830 | break; | |
831 | ||
832 | case FB_VISUAL_PSEUDOCOLOR: | |
833 | if (regno < 256) { | |
834 | val = (red >> 8) << 16; | |
835 | val |= (green >> 8) << 8; | |
836 | val |= blue >> 8; | |
837 | ||
838 | writel(val, base + (regno * 4)); | |
839 | } | |
840 | ||
841 | break; | |
842 | ||
843 | default: | |
844 | return 1; /* unknown type */ | |
845 | } | |
846 | ||
847 | return 0; | |
848 | } | |
849 | ||
850 | /* sm501fb_blank_pnl | |
851 | * | |
852 | * Blank or un-blank the panel interface | |
853 | */ | |
854 | ||
855 | static int sm501fb_blank_pnl(int blank_mode, struct fb_info *info) | |
856 | { | |
857 | struct sm501fb_par *par = info->par; | |
858 | struct sm501fb_info *fbi = par->info; | |
859 | ||
860 | dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info); | |
861 | ||
862 | switch (blank_mode) { | |
863 | case FB_BLANK_POWERDOWN: | |
864 | sm501fb_panel_power(fbi, 0); | |
865 | break; | |
866 | ||
867 | case FB_BLANK_UNBLANK: | |
868 | sm501fb_panel_power(fbi, 1); | |
869 | break; | |
870 | ||
871 | case FB_BLANK_NORMAL: | |
872 | case FB_BLANK_VSYNC_SUSPEND: | |
873 | case FB_BLANK_HSYNC_SUSPEND: | |
874 | default: | |
875 | return 1; | |
876 | } | |
877 | ||
878 | return 0; | |
879 | } | |
880 | ||
881 | /* sm501fb_blank_crt | |
882 | * | |
883 | * Blank or un-blank the crt interface | |
884 | */ | |
885 | ||
886 | static int sm501fb_blank_crt(int blank_mode, struct fb_info *info) | |
887 | { | |
888 | struct sm501fb_par *par = info->par; | |
889 | struct sm501fb_info *fbi = par->info; | |
890 | unsigned long ctrl; | |
891 | ||
892 | dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info); | |
893 | ||
894 | ctrl = readl(fbi->regs + SM501_DC_CRT_CONTROL); | |
895 | ||
896 | switch (blank_mode) { | |
897 | case FB_BLANK_POWERDOWN: | |
898 | ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE; | |
899 | sm501_misc_control(fbi->dev->parent, SM501_MISC_DAC_POWER, 0); | |
900 | ||
901 | case FB_BLANK_NORMAL: | |
902 | ctrl |= SM501_DC_CRT_CONTROL_BLANK; | |
903 | break; | |
904 | ||
905 | case FB_BLANK_UNBLANK: | |
906 | ctrl &= ~SM501_DC_CRT_CONTROL_BLANK; | |
907 | ctrl |= SM501_DC_CRT_CONTROL_ENABLE; | |
908 | sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER); | |
909 | break; | |
910 | ||
911 | case FB_BLANK_VSYNC_SUSPEND: | |
912 | case FB_BLANK_HSYNC_SUSPEND: | |
913 | default: | |
914 | return 1; | |
915 | ||
916 | } | |
917 | ||
918 | writel(ctrl, fbi->regs + SM501_DC_CRT_CONTROL); | |
919 | sm501fb_sync_regs(fbi); | |
920 | ||
921 | return 0; | |
922 | } | |
923 | ||
924 | /* sm501fb_cursor | |
925 | * | |
926 | * set or change the hardware cursor parameters | |
927 | */ | |
928 | ||
929 | int sm501fb_cursor(struct fb_info *info, struct fb_cursor *cursor) | |
930 | { | |
931 | struct sm501fb_par *par = info->par; | |
932 | struct sm501fb_info *fbi = par->info; | |
933 | void __iomem *base = fbi->regs; | |
934 | unsigned long hwc_addr; | |
935 | unsigned long fg, bg; | |
936 | ||
937 | dev_dbg(fbi->dev, "%s(%p,%p)\n", __func__, info, cursor); | |
938 | ||
939 | if (par->head == HEAD_CRT) | |
940 | base += SM501_DC_CRT_HWC_BASE; | |
941 | else | |
942 | base += SM501_DC_PANEL_HWC_BASE; | |
943 | ||
944 | /* check not being asked to exceed capabilities */ | |
945 | ||
946 | if (cursor->image.width > 64) | |
947 | return -EINVAL; | |
948 | ||
949 | if (cursor->image.height > 64) | |
950 | return -EINVAL; | |
951 | ||
952 | if (cursor->image.depth > 1) | |
953 | return -EINVAL; | |
954 | ||
955 | hwc_addr = readl(base + SM501_OFF_HWC_ADDR); | |
956 | ||
957 | if (cursor->enable) | |
958 | writel(hwc_addr | SM501_HWC_EN, base + SM501_OFF_HWC_ADDR); | |
959 | else | |
960 | writel(hwc_addr & ~SM501_HWC_EN, base + SM501_OFF_HWC_ADDR); | |
961 | ||
962 | /* set data */ | |
963 | if (cursor->set & FB_CUR_SETPOS) { | |
964 | unsigned int x = cursor->image.dx; | |
965 | unsigned int y = cursor->image.dy; | |
966 | ||
967 | if (x >= 2048 || y >= 2048 ) | |
968 | return -EINVAL; | |
969 | ||
970 | dev_dbg(fbi->dev, "set position %d,%d\n", x, y); | |
971 | ||
972 | //y += cursor->image.height; | |
973 | ||
974 | writel(x | (y << 16), base + SM501_OFF_HWC_LOC); | |
975 | } | |
976 | ||
977 | if (cursor->set & FB_CUR_SETCMAP) { | |
978 | unsigned int bg_col = cursor->image.bg_color; | |
979 | unsigned int fg_col = cursor->image.fg_color; | |
980 | ||
981 | dev_dbg(fbi->dev, "%s: update cmap (%08x,%08x)\n", | |
982 | __func__, bg_col, fg_col); | |
983 | ||
984 | bg = ((info->cmap.red[bg_col] & 0xF8) << 8) | | |
985 | ((info->cmap.green[bg_col] & 0xFC) << 3) | | |
986 | ((info->cmap.blue[bg_col] & 0xF8) >> 3); | |
987 | ||
988 | fg = ((info->cmap.red[fg_col] & 0xF8) << 8) | | |
989 | ((info->cmap.green[fg_col] & 0xFC) << 3) | | |
990 | ((info->cmap.blue[fg_col] & 0xF8) >> 3); | |
991 | ||
992 | dev_dbg(fbi->dev, "fgcol %08x, bgcol %08x\n", fg, bg); | |
993 | ||
994 | writel(bg, base + SM501_OFF_HWC_COLOR_1_2); | |
995 | writel(fg, base + SM501_OFF_HWC_COLOR_3); | |
996 | } | |
997 | ||
998 | if (cursor->set & FB_CUR_SETSIZE || | |
999 | cursor->set & (FB_CUR_SETIMAGE | FB_CUR_SETSHAPE)) { | |
1000 | /* SM501 cursor is a two bpp 64x64 bitmap this routine | |
1001 | * clears it to transparent then combines the cursor | |
1002 | * shape plane with the colour plane to set the | |
1003 | * cursor */ | |
1004 | int x, y; | |
1005 | const unsigned char *pcol = cursor->image.data; | |
1006 | const unsigned char *pmsk = cursor->mask; | |
1007 | void __iomem *dst = par->cursor.k_addr; | |
1008 | unsigned char dcol = 0; | |
1009 | unsigned char dmsk = 0; | |
1010 | unsigned int op; | |
1011 | ||
1012 | dev_dbg(fbi->dev, "%s: setting shape (%d,%d)\n", | |
1013 | __func__, cursor->image.width, cursor->image.height); | |
1014 | ||
1015 | for (op = 0; op < (64*64*2)/8; op+=4) | |
1016 | writel(0x0, dst + op); | |
1017 | ||
1018 | for (y = 0; y < cursor->image.height; y++) { | |
1019 | for (x = 0; x < cursor->image.width; x++) { | |
1020 | if ((x % 8) == 0) { | |
1021 | dcol = *pcol++; | |
1022 | dmsk = *pmsk++; | |
1023 | } else { | |
1024 | dcol >>= 1; | |
1025 | dmsk >>= 1; | |
1026 | } | |
1027 | ||
1028 | if (dmsk & 1) { | |
1029 | op = (dcol & 1) ? 1 : 3; | |
1030 | op <<= ((x % 4) * 2); | |
1031 | ||
1032 | op |= readb(dst + (x / 4)); | |
1033 | writeb(op, dst + (x / 4)); | |
1034 | } | |
1035 | } | |
1036 | dst += (64*2)/8; | |
1037 | } | |
1038 | } | |
1039 | ||
1040 | sm501fb_sync_regs(fbi); /* ensure cursor data flushed */ | |
1041 | return 0; | |
1042 | } | |
1043 | ||
1044 | /* sm501fb_crtsrc_show | |
1045 | * | |
1046 | * device attribute code to show where the crt output is sourced from | |
1047 | */ | |
1048 | ||
1049 | static ssize_t sm501fb_crtsrc_show(struct device *dev, | |
1050 | struct device_attribute *attr, char *buf) | |
1051 | { | |
1052 | struct sm501fb_info *info = dev_get_drvdata(dev); | |
1053 | unsigned long ctrl; | |
1054 | ||
1055 | ctrl = readl(info->regs + SM501_DC_CRT_CONTROL); | |
1056 | ctrl &= SM501_DC_CRT_CONTROL_SEL; | |
1057 | ||
1058 | return snprintf(buf, PAGE_SIZE, "%s\n", ctrl ? "crt" : "panel"); | |
1059 | } | |
1060 | ||
1061 | /* sm501fb_crtsrc_show | |
1062 | * | |
1063 | * device attribute code to set where the crt output is sourced from | |
1064 | */ | |
1065 | ||
1066 | static ssize_t sm501fb_crtsrc_store(struct device *dev, | |
1067 | struct device_attribute *attr, | |
1068 | const char *buf, size_t len) | |
1069 | { | |
1070 | struct sm501fb_info *info = dev_get_drvdata(dev); | |
1071 | enum sm501_controller head; | |
1072 | unsigned long ctrl; | |
1073 | ||
1074 | if (len < 1) | |
1075 | return -EINVAL; | |
1076 | ||
1077 | if (strnicmp(buf, "crt", sizeof("crt")) == 0) | |
1078 | head = HEAD_CRT; | |
1079 | else if (strnicmp(buf, "panel", sizeof("panel")) == 0) | |
1080 | head = HEAD_PANEL; | |
1081 | else | |
1082 | return -EINVAL; | |
1083 | ||
1084 | dev_info(dev, "setting crt source to head %d\n", head); | |
1085 | ||
1086 | ctrl = readl(info->regs + SM501_DC_CRT_CONTROL); | |
1087 | ||
1088 | if (head == HEAD_CRT) { | |
1089 | ctrl |= SM501_DC_CRT_CONTROL_SEL; | |
1090 | ctrl |= SM501_DC_CRT_CONTROL_ENABLE; | |
1091 | ctrl |= SM501_DC_CRT_CONTROL_TE; | |
1092 | } else { | |
1093 | ctrl &= ~SM501_DC_CRT_CONTROL_SEL; | |
1094 | ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE; | |
1095 | ctrl &= ~SM501_DC_CRT_CONTROL_TE; | |
1096 | } | |
1097 | ||
1098 | writel(ctrl, info->regs + SM501_DC_CRT_CONTROL); | |
1099 | sm501fb_sync_regs(info); | |
1100 | ||
1101 | return (head == HEAD_CRT) ? 3 : 5; | |
1102 | } | |
1103 | ||
1104 | /* Prepare the device_attr for registration with sysfs later */ | |
1105 | static DEVICE_ATTR(crt_src, 0666, sm501fb_crtsrc_show, sm501fb_crtsrc_store); | |
1106 | ||
1107 | /* sm501fb_show_regs | |
1108 | * | |
1109 | * show the primary sm501 registers | |
1110 | */ | |
1111 | static int sm501fb_show_regs(struct sm501fb_info *info, char *ptr, | |
1112 | unsigned int start, unsigned int len) | |
1113 | { | |
1114 | void __iomem *mem = info->regs; | |
1115 | char *buf = ptr; | |
1116 | unsigned int reg; | |
1117 | ||
1118 | for (reg = start; reg < (len + start); reg += 4) | |
1119 | ptr += sprintf(ptr, "%08x = %08x\n", reg, readl(mem + reg)); | |
1120 | ||
1121 | return ptr - buf; | |
1122 | } | |
1123 | ||
1124 | /* sm501fb_debug_show_crt | |
1125 | * | |
1126 | * show the crt control and cursor registers | |
1127 | */ | |
1128 | ||
1129 | static ssize_t sm501fb_debug_show_crt(struct device *dev, | |
1130 | struct device_attribute *attr, char *buf) | |
1131 | { | |
1132 | struct sm501fb_info *info = dev_get_drvdata(dev); | |
1133 | char *ptr = buf; | |
1134 | ||
1135 | ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_CONTROL, 0x40); | |
1136 | ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_HWC_BASE, 0x10); | |
1137 | ||
1138 | return ptr - buf; | |
1139 | } | |
1140 | ||
1141 | static DEVICE_ATTR(fbregs_crt, 0444, sm501fb_debug_show_crt, NULL); | |
1142 | ||
1143 | /* sm501fb_debug_show_pnl | |
1144 | * | |
1145 | * show the panel control and cursor registers | |
1146 | */ | |
1147 | ||
1148 | static ssize_t sm501fb_debug_show_pnl(struct device *dev, | |
1149 | struct device_attribute *attr, char *buf) | |
1150 | { | |
1151 | struct sm501fb_info *info = dev_get_drvdata(dev); | |
1152 | char *ptr = buf; | |
1153 | ||
1154 | ptr += sm501fb_show_regs(info, ptr, 0x0, 0x40); | |
1155 | ptr += sm501fb_show_regs(info, ptr, SM501_DC_PANEL_HWC_BASE, 0x10); | |
1156 | ||
1157 | return ptr - buf; | |
1158 | } | |
1159 | ||
1160 | static DEVICE_ATTR(fbregs_pnl, 0444, sm501fb_debug_show_pnl, NULL); | |
1161 | ||
1162 | /* framebuffer ops */ | |
1163 | ||
1164 | static struct fb_ops sm501fb_ops_crt = { | |
1165 | .owner = THIS_MODULE, | |
1166 | .fb_check_var = sm501fb_check_var_crt, | |
1167 | .fb_set_par = sm501fb_set_par_crt, | |
1168 | .fb_blank = sm501fb_blank_crt, | |
1169 | .fb_setcolreg = sm501fb_setcolreg, | |
1170 | .fb_pan_display = sm501fb_pan_crt, | |
1171 | .fb_cursor = sm501fb_cursor, | |
1172 | .fb_fillrect = cfb_fillrect, | |
1173 | .fb_copyarea = cfb_copyarea, | |
1174 | .fb_imageblit = cfb_imageblit, | |
1175 | }; | |
1176 | ||
1177 | static struct fb_ops sm501fb_ops_pnl = { | |
1178 | .owner = THIS_MODULE, | |
1179 | .fb_check_var = sm501fb_check_var_pnl, | |
1180 | .fb_set_par = sm501fb_set_par_pnl, | |
1181 | .fb_pan_display = sm501fb_pan_pnl, | |
1182 | .fb_blank = sm501fb_blank_pnl, | |
1183 | .fb_setcolreg = sm501fb_setcolreg, | |
1184 | .fb_cursor = sm501fb_cursor, | |
1185 | .fb_fillrect = cfb_fillrect, | |
1186 | .fb_copyarea = cfb_copyarea, | |
1187 | .fb_imageblit = cfb_imageblit, | |
1188 | }; | |
1189 | ||
1190 | /* sm501fb_info_alloc | |
1191 | * | |
1192 | * creates and initialises an sm501fb_info structure | |
1193 | */ | |
1194 | ||
1195 | static struct sm501fb_info *sm501fb_info_alloc(struct fb_info *fbinfo_crt, | |
1196 | struct fb_info *fbinfo_pnl) | |
1197 | { | |
1198 | struct sm501fb_info *info; | |
1199 | struct sm501fb_par *par; | |
1200 | ||
1201 | info = kzalloc(sizeof(struct sm501fb_info), GFP_KERNEL); | |
1202 | if (info) { | |
1203 | /* set the references back */ | |
1204 | ||
1205 | par = fbinfo_crt->par; | |
1206 | par->info = info; | |
1207 | par->head = HEAD_CRT; | |
1208 | fbinfo_crt->pseudo_palette = &par->pseudo_palette; | |
1209 | ||
1210 | par = fbinfo_pnl->par; | |
1211 | par->info = info; | |
1212 | par->head = HEAD_PANEL; | |
1213 | fbinfo_pnl->pseudo_palette = &par->pseudo_palette; | |
1214 | ||
1215 | /* store the two fbs into our info */ | |
1216 | info->fb[HEAD_CRT] = fbinfo_crt; | |
1217 | info->fb[HEAD_PANEL] = fbinfo_pnl; | |
1218 | } | |
1219 | ||
1220 | return info; | |
1221 | } | |
1222 | ||
1223 | /* sm501_init_cursor | |
1224 | * | |
1225 | * initialise hw cursor parameters | |
1226 | */ | |
1227 | ||
1228 | int sm501_init_cursor(struct fb_info *fbi, unsigned int reg_base) | |
1229 | { | |
1230 | struct sm501fb_par *par = fbi->par; | |
1231 | struct sm501fb_info *info = par->info; | |
1232 | int ret; | |
1233 | ||
1234 | par->cursor_regs = info->regs + reg_base; | |
1235 | ||
1236 | ret = sm501_alloc_mem(info, &par->cursor, SM501_MEMF_CURSOR, 1024); | |
1237 | if (ret < 0) | |
1238 | return ret; | |
1239 | ||
1240 | /* initialise the colour registers */ | |
1241 | ||
1242 | writel(par->cursor.sm_addr, par->cursor_regs + SM501_OFF_HWC_ADDR); | |
1243 | ||
1244 | writel(0x00, par->cursor_regs + SM501_OFF_HWC_LOC); | |
1245 | writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_1_2); | |
1246 | writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_3); | |
1247 | sm501fb_sync_regs(info); | |
1248 | ||
1249 | return 0; | |
1250 | } | |
1251 | ||
1252 | /* sm501fb_info_start | |
1253 | * | |
1254 | * fills the par structure claiming resources and remapping etc. | |
1255 | */ | |
1256 | ||
1257 | static int sm501fb_start(struct sm501fb_info *info, | |
1258 | struct platform_device *pdev) | |
1259 | { | |
1260 | struct resource *res; | |
1261 | struct device *dev; | |
1262 | int ret; | |
1263 | ||
1264 | info->dev = dev = &pdev->dev; | |
1265 | platform_set_drvdata(pdev, info); | |
1266 | ||
1267 | info->irq = ret = platform_get_irq(pdev, 0); | |
1268 | if (ret < 0) { | |
1269 | /* we currently do not use the IRQ */ | |
1270 | dev_warn(dev, "no irq for device\n"); | |
1271 | } | |
1272 | ||
1273 | /* allocate, reserve and remap resources for registers */ | |
1274 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1275 | if (res == NULL) { | |
1276 | dev_err(dev, "no resource definition for registers\n"); | |
1277 | ret = -ENOENT; | |
1278 | goto err_release; | |
1279 | } | |
1280 | ||
1281 | info->regs_res = request_mem_region(res->start, | |
1282 | res->end - res->start, | |
1283 | pdev->name); | |
1284 | ||
1285 | if (info->regs_res == NULL) { | |
1286 | dev_err(dev, "cannot claim registers\n"); | |
1287 | ret = -ENXIO; | |
1288 | goto err_release; | |
1289 | } | |
1290 | ||
1291 | info->regs = ioremap(res->start, (res->end - res->start)+1); | |
1292 | if (info->regs == NULL) { | |
1293 | dev_err(dev, "cannot remap registers\n"); | |
1294 | ret = -ENXIO; | |
1295 | goto err_regs_res; | |
1296 | } | |
1297 | ||
1298 | /* allocate, reserve resources for framebuffer */ | |
1299 | res = platform_get_resource(pdev, IORESOURCE_MEM, 2); | |
1300 | if (res == NULL) { | |
1301 | dev_err(dev, "no memory resource defined\n"); | |
1302 | ret = -ENXIO; | |
1303 | goto err_regs_map; | |
1304 | } | |
1305 | ||
1306 | info->fbmem_res = request_mem_region(res->start, | |
1307 | (res->end - res->start)+1, | |
1308 | pdev->name); | |
1309 | if (info->fbmem_res == NULL) { | |
1310 | dev_err(dev, "cannot claim framebuffer\n"); | |
1311 | ret = -ENXIO; | |
1312 | goto err_regs_map; | |
1313 | } | |
1314 | ||
1315 | info->fbmem = ioremap(res->start, (res->end - res->start)+1); | |
1316 | if (info->fbmem == NULL) { | |
1317 | dev_err(dev, "cannot remap framebuffer\n"); | |
1318 | goto err_mem_res; | |
1319 | } | |
1320 | ||
1321 | info->fbmem_len = (res->end - res->start)+1; | |
1322 | ||
1323 | /* enable display controller */ | |
1324 | sm501_unit_power(dev->parent, SM501_GATE_DISPLAY, 1); | |
1325 | ||
1326 | /* setup cursors */ | |
1327 | ||
1328 | sm501_init_cursor(info->fb[HEAD_CRT], SM501_DC_CRT_HWC_ADDR); | |
1329 | sm501_init_cursor(info->fb[HEAD_PANEL], SM501_DC_PANEL_HWC_ADDR); | |
1330 | ||
1331 | return 0; /* everything is setup */ | |
1332 | ||
1333 | err_mem_res: | |
1334 | release_resource(info->fbmem_res); | |
1335 | kfree(info->fbmem_res); | |
1336 | ||
1337 | err_regs_map: | |
1338 | iounmap(info->regs); | |
1339 | ||
1340 | err_regs_res: | |
1341 | release_resource(info->regs_res); | |
1342 | kfree(info->regs_res); | |
1343 | ||
1344 | err_release: | |
1345 | return ret; | |
1346 | } | |
1347 | ||
1348 | static void sm501fb_stop(struct sm501fb_info *info) | |
1349 | { | |
1350 | /* disable display controller */ | |
1351 | sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0); | |
1352 | ||
1353 | iounmap(info->fbmem); | |
1354 | release_resource(info->fbmem_res); | |
1355 | kfree(info->fbmem_res); | |
1356 | ||
1357 | iounmap(info->regs); | |
1358 | release_resource(info->regs_res); | |
1359 | kfree(info->regs_res); | |
1360 | } | |
1361 | ||
1362 | static void sm501fb_info_release(struct sm501fb_info *info) | |
1363 | { | |
1364 | kfree(info); | |
1365 | } | |
1366 | ||
1367 | static int sm501fb_init_fb(struct fb_info *fb, | |
1368 | enum sm501_controller head, | |
1369 | const char *fbname) | |
1370 | { | |
1371 | struct sm501_platdata_fbsub *pd; | |
1372 | struct sm501fb_par *par = fb->par; | |
1373 | struct sm501fb_info *info = par->info; | |
1374 | unsigned long ctrl; | |
1375 | unsigned int enable; | |
1376 | int ret; | |
1377 | ||
1378 | switch (head) { | |
1379 | case HEAD_CRT: | |
1380 | pd = info->pdata->fb_crt; | |
1381 | ctrl = readl(info->regs + SM501_DC_CRT_CONTROL); | |
1382 | enable = (ctrl & SM501_DC_CRT_CONTROL_ENABLE) ? 1 : 0; | |
1383 | ||
1384 | /* ensure we set the correct source register */ | |
1385 | if (info->pdata->fb_route != SM501_FB_CRT_PANEL) { | |
1386 | ctrl |= SM501_DC_CRT_CONTROL_SEL; | |
1387 | writel(ctrl, info->regs + SM501_DC_CRT_CONTROL); | |
1388 | } | |
1389 | ||
1390 | break; | |
1391 | ||
1392 | case HEAD_PANEL: | |
1393 | pd = info->pdata->fb_pnl; | |
1394 | ctrl = readl(info->regs + SM501_DC_PANEL_CONTROL); | |
1395 | enable = (ctrl & SM501_DC_PANEL_CONTROL_EN) ? 1 : 0; | |
1396 | break; | |
1397 | ||
1398 | default: | |
1399 | pd = NULL; /* stop compiler warnings */ | |
1400 | ctrl = 0; | |
1401 | enable = 0; | |
1402 | BUG(); | |
1403 | } | |
1404 | ||
1405 | dev_info(info->dev, "fb %s %sabled at start\n", | |
1406 | fbname, enable ? "en" : "dis"); | |
1407 | ||
1408 | /* check to see if our routing allows this */ | |
1409 | ||
1410 | if (head == HEAD_CRT && info->pdata->fb_route == SM501_FB_CRT_PANEL) { | |
1411 | ctrl &= ~SM501_DC_CRT_CONTROL_SEL; | |
1412 | writel(ctrl, info->regs + SM501_DC_CRT_CONTROL); | |
1413 | enable = 0; | |
1414 | } | |
1415 | ||
1416 | strlcpy(fb->fix.id, fbname, sizeof(fb->fix.id)); | |
1417 | ||
1418 | memcpy(&par->ops, | |
1419 | (head == HEAD_CRT) ? &sm501fb_ops_crt : &sm501fb_ops_pnl, | |
1420 | sizeof(struct fb_ops)); | |
1421 | ||
1422 | /* update ops dependant on what we've been passed */ | |
1423 | ||
1424 | if ((pd->flags & SM501FB_FLAG_USE_HWCURSOR) == 0) | |
1425 | par->ops.fb_cursor = NULL; | |
1426 | ||
1427 | fb->fbops = &par->ops; | |
1428 | fb->flags = FBINFO_FLAG_DEFAULT | | |
1429 | FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN; | |
1430 | ||
1431 | /* fixed data */ | |
1432 | ||
1433 | fb->fix.type = FB_TYPE_PACKED_PIXELS; | |
1434 | fb->fix.type_aux = 0; | |
1435 | fb->fix.xpanstep = 1; | |
1436 | fb->fix.ypanstep = 1; | |
1437 | fb->fix.ywrapstep = 0; | |
1438 | fb->fix.accel = FB_ACCEL_NONE; | |
1439 | ||
1440 | /* screenmode */ | |
1441 | ||
1442 | fb->var.nonstd = 0; | |
1443 | fb->var.activate = FB_ACTIVATE_NOW; | |
1444 | fb->var.accel_flags = 0; | |
1445 | fb->var.vmode = FB_VMODE_NONINTERLACED; | |
1446 | fb->var.bits_per_pixel = 16; | |
1447 | ||
1448 | if (enable && (pd->flags & SM501FB_FLAG_USE_INIT_MODE) && 0) { | |
1449 | /* TODO read the mode from the current display */ | |
1450 | ||
1451 | } else { | |
1452 | if (pd->def_mode) { | |
1453 | dev_info(info->dev, "using supplied mode\n"); | |
1454 | fb_videomode_to_var(&fb->var, pd->def_mode); | |
1455 | ||
1456 | fb->var.bits_per_pixel = pd->def_bpp ? pd->def_bpp : 8; | |
1457 | fb->var.xres_virtual = fb->var.xres; | |
1458 | fb->var.yres_virtual = fb->var.yres; | |
1459 | } else { | |
1460 | ret = fb_find_mode(&fb->var, fb, | |
1461 | NULL, NULL, 0, NULL, 8); | |
1462 | ||
1463 | if (ret == 0 || ret == 4) { | |
1464 | dev_err(info->dev, | |
1465 | "failed to get initial mode\n"); | |
1466 | return -EINVAL; | |
1467 | } | |
1468 | } | |
1469 | } | |
1470 | ||
1471 | /* initialise and set the palette */ | |
1472 | fb_alloc_cmap(&fb->cmap, NR_PALETTE, 0); | |
1473 | fb_set_cmap(&fb->cmap, fb); | |
1474 | ||
1475 | ret = (fb->fbops->fb_check_var)(&fb->var, fb); | |
1476 | if (ret) | |
1477 | dev_err(info->dev, "check_var() failed on initial setup?\n"); | |
1478 | ||
1479 | /* ensure we've activated our new configuration */ | |
1480 | (fb->fbops->fb_set_par)(fb); | |
1481 | ||
1482 | return 0; | |
1483 | } | |
1484 | ||
1485 | /* default platform data if none is supplied (ie, PCI device) */ | |
1486 | ||
1487 | static struct sm501_platdata_fbsub sm501fb_pdata_crt = { | |
1488 | .flags = (SM501FB_FLAG_USE_INIT_MODE | | |
1489 | SM501FB_FLAG_USE_HWCURSOR | | |
1490 | SM501FB_FLAG_USE_HWACCEL | | |
1491 | SM501FB_FLAG_DISABLE_AT_EXIT), | |
1492 | ||
1493 | }; | |
1494 | ||
1495 | static struct sm501_platdata_fbsub sm501fb_pdata_pnl = { | |
1496 | .flags = (SM501FB_FLAG_USE_INIT_MODE | | |
1497 | SM501FB_FLAG_USE_HWCURSOR | | |
1498 | SM501FB_FLAG_USE_HWACCEL | | |
1499 | SM501FB_FLAG_DISABLE_AT_EXIT), | |
1500 | }; | |
1501 | ||
1502 | static struct sm501_platdata_fb sm501fb_def_pdata = { | |
1503 | .fb_route = SM501_FB_OWN, | |
1504 | .fb_crt = &sm501fb_pdata_crt, | |
1505 | .fb_pnl = &sm501fb_pdata_pnl, | |
1506 | }; | |
1507 | ||
1508 | static char driver_name_crt[] = "sm501fb-crt"; | |
1509 | static char driver_name_pnl[] = "sm501fb-panel"; | |
1510 | ||
1511 | static int __init sm501fb_probe(struct platform_device *pdev) | |
1512 | { | |
1513 | struct sm501fb_info *info; | |
1514 | struct device *dev = &pdev->dev; | |
1515 | struct fb_info *fbinfo_crt; | |
1516 | struct fb_info *fbinfo_pnl; | |
1517 | int ret; | |
1518 | ||
1519 | /* allocate our framebuffers */ | |
1520 | ||
1521 | fbinfo_crt = framebuffer_alloc(sizeof(struct sm501fb_par), dev); | |
1522 | if (fbinfo_crt == NULL) { | |
1523 | dev_err(dev, "cannot allocate crt framebuffer\n"); | |
1524 | return -ENOMEM; | |
1525 | } | |
1526 | ||
1527 | fbinfo_pnl = framebuffer_alloc(sizeof(struct sm501fb_par), dev); | |
1528 | if (fbinfo_pnl == NULL) { | |
1529 | dev_err(dev, "cannot allocate panel framebuffer\n"); | |
1530 | ret = -ENOMEM; | |
1531 | goto fbinfo_crt_alloc_fail; | |
1532 | } | |
1533 | ||
1534 | info = sm501fb_info_alloc(fbinfo_crt, fbinfo_pnl); | |
1535 | if (info == NULL) { | |
1536 | dev_err(dev, "cannot allocate par\n"); | |
1537 | ret = -ENOMEM; | |
1538 | goto sm501fb_alloc_fail; | |
1539 | } | |
1540 | ||
1541 | if (dev->parent->platform_data) { | |
1542 | struct sm501_platdata *pd = dev->parent->platform_data; | |
1543 | info->pdata = pd->fb; | |
1544 | } | |
1545 | ||
1546 | if (info->pdata == NULL) { | |
1547 | dev_info(dev, "using default configuration data\n"); | |
1548 | info->pdata = &sm501fb_def_pdata; | |
1549 | } | |
1550 | ||
1551 | /* start the framebuffers */ | |
1552 | ||
1553 | ret = sm501fb_start(info, pdev); | |
1554 | if (ret) { | |
1555 | dev_err(dev, "cannot initialise SM501\n"); | |
1556 | goto sm501fb_start_fail; | |
1557 | } | |
1558 | ||
1559 | /* CRT framebuffer setup */ | |
1560 | ||
1561 | ret = sm501fb_init_fb(fbinfo_crt, HEAD_CRT, driver_name_crt); | |
1562 | if (ret) { | |
1563 | dev_err(dev, "cannot initialise CRT fb\n"); | |
1564 | goto sm501fb_start_fail; | |
1565 | } | |
1566 | ||
1567 | /* Panel framebuffer setup */ | |
1568 | ||
1569 | ret = sm501fb_init_fb(fbinfo_pnl, HEAD_PANEL, driver_name_pnl); | |
1570 | if (ret) { | |
1571 | dev_err(dev, "cannot initialise Panel fb\n"); | |
1572 | goto sm501fb_start_fail; | |
1573 | } | |
1574 | ||
1575 | /* register framebuffers */ | |
1576 | ||
1577 | ret = register_framebuffer(fbinfo_crt); | |
1578 | if (ret < 0) { | |
1579 | dev_err(dev, "failed to register CRT fb (%d)\n", ret); | |
1580 | goto register_crt_fail; | |
1581 | } | |
1582 | ||
1583 | ret = register_framebuffer(fbinfo_pnl); | |
1584 | if (ret < 0) { | |
1585 | dev_err(dev, "failed to register panel fb (%d)\n", ret); | |
1586 | goto register_pnl_fail; | |
1587 | } | |
1588 | ||
1589 | dev_info(dev, "fb%d: %s frame buffer device\n", | |
1590 | fbinfo_crt->node, fbinfo_crt->fix.id); | |
1591 | ||
1592 | dev_info(dev, "fb%d: %s frame buffer device\n", | |
1593 | fbinfo_pnl->node, fbinfo_pnl->fix.id); | |
1594 | ||
1595 | /* create device files */ | |
1596 | ||
1597 | ret = device_create_file(dev, &dev_attr_crt_src); | |
1598 | if (ret) | |
1599 | goto crtsrc_fail; | |
1600 | ||
1601 | ret = device_create_file(dev, &dev_attr_fbregs_pnl); | |
1602 | if (ret) | |
1603 | goto fbregs_pnl_fail; | |
1604 | ||
1605 | ret = device_create_file(dev, &dev_attr_fbregs_crt); | |
1606 | if (ret) | |
1607 | goto fbregs_crt_fail; | |
1608 | ||
1609 | /* we registered, return ok */ | |
1610 | return 0; | |
1611 | ||
1612 | fbregs_crt_fail: | |
1613 | device_remove_file(dev, &dev_attr_fbregs_pnl); | |
1614 | ||
1615 | fbregs_pnl_fail: | |
1616 | device_remove_file(dev, &dev_attr_crt_src); | |
1617 | ||
1618 | crtsrc_fail: | |
1619 | unregister_framebuffer(fbinfo_pnl); | |
1620 | ||
1621 | register_pnl_fail: | |
1622 | unregister_framebuffer(fbinfo_crt); | |
1623 | ||
1624 | register_crt_fail: | |
1625 | sm501fb_stop(info); | |
1626 | ||
1627 | sm501fb_start_fail: | |
1628 | sm501fb_info_release(info); | |
1629 | ||
1630 | sm501fb_alloc_fail: | |
1631 | framebuffer_release(fbinfo_pnl); | |
1632 | ||
1633 | fbinfo_crt_alloc_fail: | |
1634 | framebuffer_release(fbinfo_crt); | |
1635 | ||
1636 | return ret; | |
1637 | } | |
1638 | ||
1639 | ||
1640 | /* | |
1641 | * Cleanup | |
1642 | */ | |
1643 | static int sm501fb_remove(struct platform_device *pdev) | |
1644 | { | |
1645 | struct sm501fb_info *info = platform_get_drvdata(pdev); | |
1646 | struct fb_info *fbinfo_crt = info->fb[0]; | |
1647 | struct fb_info *fbinfo_pnl = info->fb[1]; | |
1648 | ||
1649 | device_remove_file(&pdev->dev, &dev_attr_fbregs_crt); | |
1650 | device_remove_file(&pdev->dev, &dev_attr_fbregs_pnl); | |
1651 | device_remove_file(&pdev->dev, &dev_attr_crt_src); | |
1652 | ||
1653 | unregister_framebuffer(fbinfo_crt); | |
1654 | unregister_framebuffer(fbinfo_pnl); | |
1655 | ||
1656 | sm501fb_stop(info); | |
1657 | sm501fb_info_release(info); | |
1658 | ||
1659 | framebuffer_release(fbinfo_pnl); | |
1660 | framebuffer_release(fbinfo_crt); | |
1661 | ||
1662 | return 0; | |
1663 | } | |
1664 | ||
1665 | #ifdef CONFIG_PM | |
1666 | ||
1667 | static int sm501fb_suspend_fb(struct sm501fb_info *info, | |
1668 | enum sm501_controller head) | |
1669 | { | |
1670 | struct fb_info *fbi = info->fb[head]; | |
1671 | struct sm501fb_par *par = fbi->par; | |
1672 | ||
1673 | if (par->screen.size == 0) | |
1674 | return 0; | |
1675 | ||
1676 | /* backup copies in case chip is powered down over suspend */ | |
1677 | ||
1678 | par->store_fb = vmalloc(par->screen.size); | |
1679 | if (par->store_fb == NULL) { | |
1680 | dev_err(info->dev, "no memory to store screen\n"); | |
1681 | return -ENOMEM; | |
1682 | } | |
1683 | ||
1684 | par->store_cursor = vmalloc(par->cursor.size); | |
1685 | if (par->store_cursor == NULL) { | |
1686 | dev_err(info->dev, "no memory to store cursor\n"); | |
1687 | goto err_nocursor; | |
1688 | } | |
1689 | ||
1690 | memcpy_fromio(par->store_fb, par->screen.k_addr, par->screen.size); | |
1691 | memcpy_fromio(par->store_cursor, par->cursor.k_addr, par->cursor.size); | |
1692 | ||
1693 | /* blank the relevant interface to ensure unit power minimised */ | |
1694 | (par->ops.fb_blank)(FB_BLANK_POWERDOWN, fbi); | |
1695 | ||
1696 | return 0; | |
1697 | ||
1698 | err_nocursor: | |
1699 | vfree(par->store_fb); | |
1700 | ||
1701 | return -ENOMEM; | |
1702 | ||
1703 | } | |
1704 | ||
1705 | static void sm501fb_resume_fb(struct sm501fb_info *info, | |
1706 | enum sm501_controller head) | |
1707 | { | |
1708 | struct fb_info *fbi = info->fb[head]; | |
1709 | struct sm501fb_par *par = fbi->par; | |
1710 | ||
1711 | if (par->screen.size == 0) | |
1712 | return; | |
1713 | ||
1714 | /* re-activate the configuration */ | |
1715 | ||
1716 | (par->ops.fb_set_par)(fbi); | |
1717 | ||
1718 | /* restore the data */ | |
1719 | ||
1720 | memcpy_toio(par->screen.k_addr, par->store_fb, par->screen.size); | |
1721 | memcpy_toio(par->cursor.k_addr, par->store_cursor, par->cursor.size); | |
1722 | ||
1723 | vfree(par->store_fb); | |
1724 | vfree(par->store_cursor); | |
1725 | } | |
1726 | ||
1727 | ||
1728 | /* suspend and resume support */ | |
1729 | ||
1730 | static int sm501fb_suspend(struct platform_device *pdev, pm_message_t state) | |
1731 | { | |
1732 | struct sm501fb_info *info = platform_get_drvdata(pdev); | |
1733 | ||
1734 | sm501fb_suspend_fb(info, HEAD_CRT); | |
1735 | sm501fb_suspend_fb(info, HEAD_PANEL); | |
1736 | ||
1737 | /* turn off the clocks, in case the device is not powered down */ | |
1738 | sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0); | |
1739 | ||
1740 | return 0; | |
1741 | } | |
1742 | ||
1743 | static int sm501fb_resume(struct platform_device *pdev) | |
1744 | { | |
1745 | struct sm501fb_info *info = platform_get_drvdata(pdev); | |
1746 | ||
1747 | sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 1); | |
1748 | ||
1749 | sm501fb_resume_fb(info, HEAD_CRT); | |
1750 | sm501fb_resume_fb(info, HEAD_PANEL); | |
1751 | ||
1752 | return 0; | |
1753 | } | |
1754 | ||
1755 | #else | |
1756 | #define sm501fb_suspend NULL | |
1757 | #define sm501fb_resume NULL | |
1758 | #endif | |
1759 | ||
1760 | static struct platform_driver sm501fb_driver = { | |
1761 | .probe = sm501fb_probe, | |
1762 | .remove = sm501fb_remove, | |
1763 | .suspend = sm501fb_suspend, | |
1764 | .resume = sm501fb_resume, | |
1765 | .driver = { | |
1766 | .name = "sm501-fb", | |
1767 | .owner = THIS_MODULE, | |
1768 | }, | |
1769 | }; | |
1770 | ||
1771 | int __devinit sm501fb_init(void) | |
1772 | { | |
1773 | return platform_driver_register(&sm501fb_driver); | |
1774 | } | |
1775 | ||
1776 | static void __exit sm501fb_cleanup(void) | |
1777 | { | |
1778 | platform_driver_unregister(&sm501fb_driver); | |
1779 | } | |
1780 | ||
1781 | module_init(sm501fb_init); | |
1782 | module_exit(sm501fb_cleanup); | |
1783 | ||
1784 | MODULE_AUTHOR("Ben Dooks, Vincent Sanders"); | |
1785 | MODULE_DESCRIPTION("SM501 Framebuffer driver"); | |
1786 | MODULE_LICENSE("GPL v2"); |