1 // SPDX-License-Identifier: GPL-2.0-only
2 /* linux/drivers/video/sm501fb.c
3 *
4 * Copyright (c) 2006 Simtec Electronics
5 * Vincent Sanders <vince@simtec.co.uk>
6 * Ben Dooks <ben@simtec.co.uk>
7 *
8 * Framebuffer driver for the Silicon Motion SM501
9 */
10
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/errno.h>
14 #include <linux/string.h>
15 #include <linux/mm.h>
16 #include <linux/tty.h>
17 #include <linux/slab.h>
18 #include <linux/delay.h>
19 #include <linux/fb.h>
20 #include <linux/init.h>
21 #include <linux/vmalloc.h>
22 #include <linux/dma-mapping.h>
23 #include <linux/interrupt.h>
24 #include <linux/workqueue.h>
25 #include <linux/wait.h>
26 #include <linux/platform_device.h>
27 #include <linux/clk.h>
28 #include <linux/console.h>
29 #include <linux/io.h>
30
31 #include <linux/uaccess.h>
32 #include <asm/div64.h>
33
34 #ifdef CONFIG_PM
35 #include <linux/pm.h>
36 #endif
37
38 #include <linux/sm501.h>
39 #include <linux/sm501-regs.h>
40
41 #include "edid.h"
42
43 static char *fb_mode = "640x480-16@60";
44 static unsigned long default_bpp = 16;
45
46 static const struct fb_videomode sm501_default_mode = {
47 .refresh = 60,
48 .xres = 640,
49 .yres = 480,
50 .pixclock = 20833,
51 .left_margin = 142,
52 .right_margin = 13,
53 .upper_margin = 21,
54 .lower_margin = 1,
55 .hsync_len = 69,
56 .vsync_len = 3,
57 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
58 .vmode = FB_VMODE_NONINTERLACED
59 };
60
61 #define NR_PALETTE 256
62
63 enum sm501_controller {
64 HEAD_CRT = 0,
65 HEAD_PANEL = 1,
66 };
67
68 /* SM501 memory address.
69 *
70 * This structure is used to track memory usage within the SM501 framebuffer
71 * allocation. The sm_addr field is stored as an offset as it is often used
72 * against both the physical and mapped addresses.
73 */
74 struct sm501_mem {
75 unsigned long size;
76 unsigned long sm_addr; /* offset from base of sm501 fb. */
77 void __iomem *k_addr;
78 };
79
80 /* private data that is shared between all frambuffers* */
81 struct sm501fb_info {
82 struct device *dev;
83 struct fb_info *fb[2]; /* fb info for both heads */
84 struct resource *fbmem_res; /* framebuffer resource */
85 struct resource *regs_res; /* registers resource */
86 struct resource *regs2d_res; /* 2d registers resource */
87 struct sm501_platdata_fb *pdata; /* our platform data */
88
89 unsigned long pm_crt_ctrl; /* pm: crt ctrl save */
90
91 int irq;
92 int swap_endian; /* set to swap rgb=>bgr */
93 void __iomem *regs; /* remapped registers */
94 void __iomem *regs2d; /* 2d remapped registers */
95 void __iomem *fbmem; /* remapped framebuffer */
96 size_t fbmem_len; /* length of remapped region */
97 u8 *edid_data;
98 };
99
100 /* per-framebuffer private data */
101 struct sm501fb_par {
102 u32 pseudo_palette[16];
103
104 enum sm501_controller head;
105 struct sm501_mem cursor;
106 struct sm501_mem screen;
107 struct fb_ops ops;
108
109 void *store_fb;
110 void *store_cursor;
111 void __iomem *cursor_regs;
112 struct sm501fb_info *info;
113 };
114
115 /* Helper functions */
116
h_total(struct fb_var_screeninfo * var)117 static inline int h_total(struct fb_var_screeninfo *var)
118 {
119 return var->xres + var->left_margin +
120 var->right_margin + var->hsync_len;
121 }
122
v_total(struct fb_var_screeninfo * var)123 static inline int v_total(struct fb_var_screeninfo *var)
124 {
125 return var->yres + var->upper_margin +
126 var->lower_margin + var->vsync_len;
127 }
128
129 /* sm501fb_sync_regs()
130 *
131 * This call is mainly for PCI bus systems where we need to
132 * ensure that any writes to the bus are completed before the
133 * next phase, or after completing a function.
134 */
135
sm501fb_sync_regs(struct sm501fb_info * info)136 static inline void sm501fb_sync_regs(struct sm501fb_info *info)
137 {
138 smc501_readl(info->regs);
139 }
140
141 /* sm501_alloc_mem
142 *
143 * This is an attempt to lay out memory for the two framebuffers and
144 * everything else
145 *
146 * |fbmem_res->start fbmem_res->end|
147 * | |
148 * |fb[0].fix.smem_start | |fb[1].fix.smem_start | 2K |
149 * |-> fb[0].fix.smem_len <-| spare |-> fb[1].fix.smem_len <-|-> cursors <-|
150 *
151 * The "spare" space is for the 2d engine data
152 * the fixed is space for the cursors (2x1Kbyte)
153 *
154 * we need to allocate memory for the 2D acceleration engine
155 * command list and the data for the engine to deal with.
156 *
157 * - all allocations must be 128bit aligned
158 * - cursors are 64x64x2 bits (1Kbyte)
159 *
160 */
161
162 #define SM501_MEMF_CURSOR (1)
163 #define SM501_MEMF_PANEL (2)
164 #define SM501_MEMF_CRT (4)
165 #define SM501_MEMF_ACCEL (8)
166
sm501_alloc_mem(struct sm501fb_info * inf,struct sm501_mem * mem,unsigned int why,size_t size,u32 smem_len)167 static int sm501_alloc_mem(struct sm501fb_info *inf, struct sm501_mem *mem,
168 unsigned int why, size_t size, u32 smem_len)
169 {
170 struct sm501fb_par *par;
171 struct fb_info *fbi;
172 unsigned int ptr;
173 unsigned int end;
174
175 switch (why) {
176 case SM501_MEMF_CURSOR:
177 ptr = inf->fbmem_len - size;
178 inf->fbmem_len = ptr; /* adjust available memory. */
179 break;
180
181 case SM501_MEMF_PANEL:
182 if (size > inf->fbmem_len)
183 return -ENOMEM;
184
185 ptr = inf->fbmem_len - size;
186 fbi = inf->fb[HEAD_CRT];
187
188 /* round down, some programs such as directfb do not draw
189 * 0,0 correctly unless the start is aligned to a page start.
190 */
191
192 if (ptr > 0)
193 ptr &= ~(PAGE_SIZE - 1);
194
195 if (fbi && ptr < smem_len)
196 return -ENOMEM;
197
198 break;
199
200 case SM501_MEMF_CRT:
201 ptr = 0;
202
203 /* check to see if we have panel memory allocated
204 * which would put an limit on available memory. */
205
206 fbi = inf->fb[HEAD_PANEL];
207 if (fbi) {
208 par = fbi->par;
209 end = par->screen.k_addr ? par->screen.sm_addr : inf->fbmem_len;
210 } else
211 end = inf->fbmem_len;
212
213 if ((ptr + size) > end)
214 return -ENOMEM;
215
216 break;
217
218 case SM501_MEMF_ACCEL:
219 fbi = inf->fb[HEAD_CRT];
220 ptr = fbi ? smem_len : 0;
221
222 fbi = inf->fb[HEAD_PANEL];
223 if (fbi) {
224 par = fbi->par;
225 end = par->screen.sm_addr;
226 } else
227 end = inf->fbmem_len;
228
229 if ((ptr + size) > end)
230 return -ENOMEM;
231
232 break;
233
234 default:
235 return -EINVAL;
236 }
237
238 mem->size = size;
239 mem->sm_addr = ptr;
240 mem->k_addr = inf->fbmem + ptr;
241
242 dev_dbg(inf->dev, "%s: result %08lx, %p - %u, %zd\n",
243 __func__, mem->sm_addr, mem->k_addr, why, size);
244
245 return 0;
246 }
247
248 /* sm501fb_ps_to_hz
249 *
250 * Converts a period in picoseconds to Hz.
251 *
252 * Note, we try to keep this in Hz to minimise rounding with
253 * the limited PLL settings on the SM501.
254 */
255
sm501fb_ps_to_hz(unsigned long psvalue)256 static unsigned long sm501fb_ps_to_hz(unsigned long psvalue)
257 {
258 unsigned long long numerator=1000000000000ULL;
259
260 /* 10^12 / picosecond period gives frequency in Hz */
261 do_div(numerator, psvalue);
262 return (unsigned long)numerator;
263 }
264
265 /* sm501fb_hz_to_ps is identical to the opposite transform */
266
267 #define sm501fb_hz_to_ps(x) sm501fb_ps_to_hz(x)
268
269 /* sm501fb_setup_gamma
270 *
271 * Programs a linear 1.0 gamma ramp in case the gamma
272 * correction is enabled without programming anything else.
273 */
274
sm501fb_setup_gamma(struct sm501fb_info * fbi,unsigned long palette)275 static void sm501fb_setup_gamma(struct sm501fb_info *fbi,
276 unsigned long palette)
277 {
278 unsigned long value = 0;
279 int offset;
280
281 /* set gamma values */
282 for (offset = 0; offset < 256 * 4; offset += 4) {
283 smc501_writel(value, fbi->regs + palette + offset);
284 value += 0x010101; /* Advance RGB by 1,1,1.*/
285 }
286 }
287
288 /* sm501fb_check_var
289 *
290 * check common variables for both panel and crt
291 */
292
sm501fb_check_var(struct fb_var_screeninfo * var,struct fb_info * info)293 static int sm501fb_check_var(struct fb_var_screeninfo *var,
294 struct fb_info *info)
295 {
296 struct sm501fb_par *par = info->par;
297 struct sm501fb_info *sm = par->info;
298 unsigned long tmp;
299
300 /* check we can fit these values into the registers */
301
302 if (var->hsync_len > 255 || var->vsync_len > 63)
303 return -EINVAL;
304
305 /* hdisplay end and hsync start */
306 if ((var->xres + var->right_margin) > 4096)
307 return -EINVAL;
308
309 /* vdisplay end and vsync start */
310 if ((var->yres + var->lower_margin) > 2048)
311 return -EINVAL;
312
313 /* hard limits of device */
314
315 if (h_total(var) > 4096 || v_total(var) > 2048)
316 return -EINVAL;
317
318 /* check our line length is going to be 128 bit aligned */
319
320 tmp = (var->xres * var->bits_per_pixel) / 8;
321 if ((tmp & 15) != 0)
322 return -EINVAL;
323
324 /* check the virtual size */
325
326 if (var->xres_virtual > 4096 || var->yres_virtual > 2048)
327 return -EINVAL;
328
329 /* can cope with 8,16 or 32bpp */
330
331 if (var->bits_per_pixel <= 8)
332 var->bits_per_pixel = 8;
333 else if (var->bits_per_pixel <= 16)
334 var->bits_per_pixel = 16;
335 else if (var->bits_per_pixel == 24)
336 var->bits_per_pixel = 32;
337
338 /* set r/g/b positions and validate bpp */
339 switch(var->bits_per_pixel) {
340 case 8:
341 var->red.length = var->bits_per_pixel;
342 var->red.offset = 0;
343 var->green.length = var->bits_per_pixel;
344 var->green.offset = 0;
345 var->blue.length = var->bits_per_pixel;
346 var->blue.offset = 0;
347 var->transp.length = 0;
348 var->transp.offset = 0;
349
350 break;
351
352 case 16:
353 if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) {
354 var->blue.offset = 11;
355 var->green.offset = 5;
356 var->red.offset = 0;
357 } else {
358 var->red.offset = 11;
359 var->green.offset = 5;
360 var->blue.offset = 0;
361 }
362 var->transp.offset = 0;
363
364 var->red.length = 5;
365 var->green.length = 6;
366 var->blue.length = 5;
367 var->transp.length = 0;
368 break;
369
370 case 32:
371 if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) {
372 var->transp.offset = 0;
373 var->red.offset = 8;
374 var->green.offset = 16;
375 var->blue.offset = 24;
376 } else {
377 var->transp.offset = 24;
378 var->red.offset = 16;
379 var->green.offset = 8;
380 var->blue.offset = 0;
381 }
382
383 var->red.length = 8;
384 var->green.length = 8;
385 var->blue.length = 8;
386 var->transp.length = 0;
387 break;
388
389 default:
390 return -EINVAL;
391 }
392
393 return 0;
394 }
395
396 /*
397 * sm501fb_check_var_crt():
398 *
399 * check the parameters for the CRT head, and either bring them
400 * back into range, or return -EINVAL.
401 */
402
sm501fb_check_var_crt(struct fb_var_screeninfo * var,struct fb_info * info)403 static int sm501fb_check_var_crt(struct fb_var_screeninfo *var,
404 struct fb_info *info)
405 {
406 return sm501fb_check_var(var, info);
407 }
408
409 /* sm501fb_check_var_pnl():
410 *
411 * check the parameters for the CRT head, and either bring them
412 * back into range, or return -EINVAL.
413 */
414
sm501fb_check_var_pnl(struct fb_var_screeninfo * var,struct fb_info * info)415 static int sm501fb_check_var_pnl(struct fb_var_screeninfo *var,
416 struct fb_info *info)
417 {
418 return sm501fb_check_var(var, info);
419 }
420
421 /* sm501fb_set_par_common
422 *
423 * set common registers for framebuffers
424 */
425
sm501fb_set_par_common(struct fb_info * info,struct fb_var_screeninfo * var)426 static int sm501fb_set_par_common(struct fb_info *info,
427 struct fb_var_screeninfo *var)
428 {
429 struct sm501fb_par *par = info->par;
430 struct sm501fb_info *fbi = par->info;
431 unsigned long pixclock; /* pixelclock in Hz */
432 unsigned long sm501pixclock; /* pixelclock the 501 can achieve in Hz */
433 unsigned int mem_type;
434 unsigned int clock_type;
435 unsigned int head_addr;
436 unsigned int smem_len;
437
438 dev_dbg(fbi->dev, "%s: %dx%d, bpp = %d, virtual %dx%d\n",
439 __func__, var->xres, var->yres, var->bits_per_pixel,
440 var->xres_virtual, var->yres_virtual);
441
442 switch (par->head) {
443 case HEAD_CRT:
444 mem_type = SM501_MEMF_CRT;
445 clock_type = SM501_CLOCK_V2XCLK;
446 head_addr = SM501_DC_CRT_FB_ADDR;
447 break;
448
449 case HEAD_PANEL:
450 mem_type = SM501_MEMF_PANEL;
451 clock_type = SM501_CLOCK_P2XCLK;
452 head_addr = SM501_DC_PANEL_FB_ADDR;
453 break;
454
455 default:
456 mem_type = 0; /* stop compiler warnings */
457 head_addr = 0;
458 clock_type = 0;
459 }
460
461 switch (var->bits_per_pixel) {
462 case 8:
463 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
464 break;
465
466 case 16:
467 info->fix.visual = FB_VISUAL_TRUECOLOR;
468 break;
469
470 case 32:
471 info->fix.visual = FB_VISUAL_TRUECOLOR;
472 break;
473 }
474
475 /* allocate fb memory within 501 */
476 info->fix.line_length = (var->xres_virtual * var->bits_per_pixel)/8;
477 smem_len = info->fix.line_length * var->yres_virtual;
478
479 dev_dbg(fbi->dev, "%s: line length = %u\n", __func__,
480 info->fix.line_length);
481
482 if (sm501_alloc_mem(fbi, &par->screen, mem_type, smem_len, smem_len)) {
483 dev_err(fbi->dev, "no memory available\n");
484 return -ENOMEM;
485 }
486
487 mutex_lock(&info->mm_lock);
488 info->fix.smem_start = fbi->fbmem_res->start + par->screen.sm_addr;
489 info->fix.smem_len = smem_len;
490 mutex_unlock(&info->mm_lock);
491
492 info->screen_base = fbi->fbmem + par->screen.sm_addr;
493 info->screen_size = info->fix.smem_len;
494
495 /* set start of framebuffer to the screen */
496
497 smc501_writel(par->screen.sm_addr | SM501_ADDR_FLIP,
498 fbi->regs + head_addr);
499
500 /* program CRT clock */
501
502 pixclock = sm501fb_ps_to_hz(var->pixclock);
503
504 sm501pixclock = sm501_set_clock(fbi->dev->parent, clock_type,
505 pixclock);
506
507 /* update fb layer with actual clock used */
508 var->pixclock = sm501fb_hz_to_ps(sm501pixclock);
509
510 dev_dbg(fbi->dev, "%s: pixclock(ps) = %u, pixclock(Hz) = %lu, "
511 "sm501pixclock = %lu, error = %ld%%\n",
512 __func__, var->pixclock, pixclock, sm501pixclock,
513 ((pixclock - sm501pixclock)*100)/pixclock);
514
515 return 0;
516 }
517
518 /* sm501fb_set_par_geometry
519 *
520 * set the geometry registers for specified framebuffer.
521 */
522
sm501fb_set_par_geometry(struct fb_info * info,struct fb_var_screeninfo * var)523 static void sm501fb_set_par_geometry(struct fb_info *info,
524 struct fb_var_screeninfo *var)
525 {
526 struct sm501fb_par *par = info->par;
527 struct sm501fb_info *fbi = par->info;
528 void __iomem *base = fbi->regs;
529 unsigned long reg;
530
531 if (par->head == HEAD_CRT)
532 base += SM501_DC_CRT_H_TOT;
533 else
534 base += SM501_DC_PANEL_H_TOT;
535
536 /* set framebuffer width and display width */
537
538 reg = info->fix.line_length;
539 reg |= ((var->xres * var->bits_per_pixel)/8) << 16;
540
541 smc501_writel(reg, fbi->regs + (par->head == HEAD_CRT ?
542 SM501_DC_CRT_FB_OFFSET : SM501_DC_PANEL_FB_OFFSET));
543
544 /* program horizontal total */
545
546 reg = (h_total(var) - 1) << 16;
547 reg |= (var->xres - 1);
548
549 smc501_writel(reg, base + SM501_OFF_DC_H_TOT);
550
551 /* program horizontal sync */
552
553 reg = var->hsync_len << 16;
554 reg |= var->xres + var->right_margin - 1;
555
556 smc501_writel(reg, base + SM501_OFF_DC_H_SYNC);
557
558 /* program vertical total */
559
560 reg = (v_total(var) - 1) << 16;
561 reg |= (var->yres - 1);
562
563 smc501_writel(reg, base + SM501_OFF_DC_V_TOT);
564
565 /* program vertical sync */
566 reg = var->vsync_len << 16;
567 reg |= var->yres + var->lower_margin - 1;
568
569 smc501_writel(reg, base + SM501_OFF_DC_V_SYNC);
570 }
571
572 /* sm501fb_pan_crt
573 *
574 * pan the CRT display output within an virtual framebuffer
575 */
576
sm501fb_pan_crt(struct fb_var_screeninfo * var,struct fb_info * info)577 static int sm501fb_pan_crt(struct fb_var_screeninfo *var,
578 struct fb_info *info)
579 {
580 struct sm501fb_par *par = info->par;
581 struct sm501fb_info *fbi = par->info;
582 unsigned int bytes_pixel = info->var.bits_per_pixel / 8;
583 unsigned long reg;
584 unsigned long xoffs;
585
586 xoffs = var->xoffset * bytes_pixel;
587
588 reg = smc501_readl(fbi->regs + SM501_DC_CRT_CONTROL);
589
590 reg &= ~SM501_DC_CRT_CONTROL_PIXEL_MASK;
591 reg |= ((xoffs & 15) / bytes_pixel) << 4;
592 smc501_writel(reg, fbi->regs + SM501_DC_CRT_CONTROL);
593
594 reg = (par->screen.sm_addr + xoffs +
595 var->yoffset * info->fix.line_length);
596 smc501_writel(reg | SM501_ADDR_FLIP, fbi->regs + SM501_DC_CRT_FB_ADDR);
597
598 sm501fb_sync_regs(fbi);
599 return 0;
600 }
601
602 /* sm501fb_pan_pnl
603 *
604 * pan the panel display output within an virtual framebuffer
605 */
606
sm501fb_pan_pnl(struct fb_var_screeninfo * var,struct fb_info * info)607 static int sm501fb_pan_pnl(struct fb_var_screeninfo *var,
608 struct fb_info *info)
609 {
610 struct sm501fb_par *par = info->par;
611 struct sm501fb_info *fbi = par->info;
612 unsigned long reg;
613
614 reg = var->xoffset | (info->var.xres_virtual << 16);
615 smc501_writel(reg, fbi->regs + SM501_DC_PANEL_FB_WIDTH);
616
617 reg = var->yoffset | (info->var.yres_virtual << 16);
618 smc501_writel(reg, fbi->regs + SM501_DC_PANEL_FB_HEIGHT);
619
620 sm501fb_sync_regs(fbi);
621 return 0;
622 }
623
624 /* sm501fb_set_par_crt
625 *
626 * Set the CRT video mode from the fb_info structure
627 */
628
sm501fb_set_par_crt(struct fb_info * info)629 static int sm501fb_set_par_crt(struct fb_info *info)
630 {
631 struct sm501fb_par *par = info->par;
632 struct sm501fb_info *fbi = par->info;
633 struct fb_var_screeninfo *var = &info->var;
634 unsigned long control; /* control register */
635 int ret;
636
637 /* activate new configuration */
638
639 dev_dbg(fbi->dev, "%s(%p)\n", __func__, info);
640
641 /* enable CRT DAC - note 0 is on!*/
642 sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER);
643
644 control = smc501_readl(fbi->regs + SM501_DC_CRT_CONTROL);
645
646 control &= (SM501_DC_CRT_CONTROL_PIXEL_MASK |
647 SM501_DC_CRT_CONTROL_GAMMA |
648 SM501_DC_CRT_CONTROL_BLANK |
649 SM501_DC_CRT_CONTROL_SEL |
650 SM501_DC_CRT_CONTROL_CP |
651 SM501_DC_CRT_CONTROL_TVP);
652
653 /* set the sync polarities before we check data source */
654
655 if ((var->sync & FB_SYNC_HOR_HIGH_ACT) == 0)
656 control |= SM501_DC_CRT_CONTROL_HSP;
657
658 if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0)
659 control |= SM501_DC_CRT_CONTROL_VSP;
660
661 if ((control & SM501_DC_CRT_CONTROL_SEL) == 0) {
662 /* the head is displaying panel data... */
663
664 sm501_alloc_mem(fbi, &par->screen, SM501_MEMF_CRT, 0,
665 info->fix.smem_len);
666 goto out_update;
667 }
668
669 ret = sm501fb_set_par_common(info, var);
670 if (ret) {
671 dev_err(fbi->dev, "failed to set common parameters\n");
672 return ret;
673 }
674
675 sm501fb_pan_crt(var, info);
676 sm501fb_set_par_geometry(info, var);
677
678 control |= SM501_FIFO_3; /* fill if >3 free slots */
679
680 switch(var->bits_per_pixel) {
681 case 8:
682 control |= SM501_DC_CRT_CONTROL_8BPP;
683 break;
684
685 case 16:
686 control |= SM501_DC_CRT_CONTROL_16BPP;
687 sm501fb_setup_gamma(fbi, SM501_DC_CRT_PALETTE);
688 break;
689
690 case 32:
691 control |= SM501_DC_CRT_CONTROL_32BPP;
692 sm501fb_setup_gamma(fbi, SM501_DC_CRT_PALETTE);
693 break;
694
695 default:
696 BUG();
697 }
698
699 control |= SM501_DC_CRT_CONTROL_SEL; /* CRT displays CRT data */
700 control |= SM501_DC_CRT_CONTROL_TE; /* enable CRT timing */
701 control |= SM501_DC_CRT_CONTROL_ENABLE; /* enable CRT plane */
702
703 out_update:
704 dev_dbg(fbi->dev, "new control is %08lx\n", control);
705
706 smc501_writel(control, fbi->regs + SM501_DC_CRT_CONTROL);
707 sm501fb_sync_regs(fbi);
708
709 return 0;
710 }
711
sm501fb_panel_power(struct sm501fb_info * fbi,int to)712 static void sm501fb_panel_power(struct sm501fb_info *fbi, int to)
713 {
714 unsigned long control;
715 void __iomem *ctrl_reg = fbi->regs + SM501_DC_PANEL_CONTROL;
716 struct sm501_platdata_fbsub *pd = fbi->pdata->fb_pnl;
717
718 control = smc501_readl(ctrl_reg);
719
720 if (to && (control & SM501_DC_PANEL_CONTROL_VDD) == 0) {
721 /* enable panel power */
722
723 control |= SM501_DC_PANEL_CONTROL_VDD; /* FPVDDEN */
724 smc501_writel(control, ctrl_reg);
725 sm501fb_sync_regs(fbi);
726 mdelay(10);
727
728 control |= SM501_DC_PANEL_CONTROL_DATA; /* DATA */
729 smc501_writel(control, ctrl_reg);
730 sm501fb_sync_regs(fbi);
731 mdelay(10);
732
733 /* VBIASEN */
734
735 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_VBIASEN)) {
736 if (pd->flags & SM501FB_FLAG_PANEL_INV_VBIASEN)
737 control &= ~SM501_DC_PANEL_CONTROL_BIAS;
738 else
739 control |= SM501_DC_PANEL_CONTROL_BIAS;
740
741 smc501_writel(control, ctrl_reg);
742 sm501fb_sync_regs(fbi);
743 mdelay(10);
744 }
745
746 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_FPEN)) {
747 if (pd->flags & SM501FB_FLAG_PANEL_INV_FPEN)
748 control &= ~SM501_DC_PANEL_CONTROL_FPEN;
749 else
750 control |= SM501_DC_PANEL_CONTROL_FPEN;
751
752 smc501_writel(control, ctrl_reg);
753 sm501fb_sync_regs(fbi);
754 mdelay(10);
755 }
756 } else if (!to && (control & SM501_DC_PANEL_CONTROL_VDD) != 0) {
757 /* disable panel power */
758 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_FPEN)) {
759 if (pd->flags & SM501FB_FLAG_PANEL_INV_FPEN)
760 control |= SM501_DC_PANEL_CONTROL_FPEN;
761 else
762 control &= ~SM501_DC_PANEL_CONTROL_FPEN;
763
764 smc501_writel(control, ctrl_reg);
765 sm501fb_sync_regs(fbi);
766 mdelay(10);
767 }
768
769 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_VBIASEN)) {
770 if (pd->flags & SM501FB_FLAG_PANEL_INV_VBIASEN)
771 control |= SM501_DC_PANEL_CONTROL_BIAS;
772 else
773 control &= ~SM501_DC_PANEL_CONTROL_BIAS;
774
775 smc501_writel(control, ctrl_reg);
776 sm501fb_sync_regs(fbi);
777 mdelay(10);
778 }
779
780 control &= ~SM501_DC_PANEL_CONTROL_DATA;
781 smc501_writel(control, ctrl_reg);
782 sm501fb_sync_regs(fbi);
783 mdelay(10);
784
785 control &= ~SM501_DC_PANEL_CONTROL_VDD;
786 smc501_writel(control, ctrl_reg);
787 sm501fb_sync_regs(fbi);
788 mdelay(10);
789 }
790
791 sm501fb_sync_regs(fbi);
792 }
793
794 /* sm501fb_set_par_pnl
795 *
796 * Set the panel video mode from the fb_info structure
797 */
798
sm501fb_set_par_pnl(struct fb_info * info)799 static int sm501fb_set_par_pnl(struct fb_info *info)
800 {
801 struct sm501fb_par *par = info->par;
802 struct sm501fb_info *fbi = par->info;
803 struct fb_var_screeninfo *var = &info->var;
804 unsigned long control;
805 unsigned long reg;
806 int ret;
807
808 dev_dbg(fbi->dev, "%s(%p)\n", __func__, info);
809
810 /* activate this new configuration */
811
812 ret = sm501fb_set_par_common(info, var);
813 if (ret)
814 return ret;
815
816 sm501fb_pan_pnl(var, info);
817 sm501fb_set_par_geometry(info, var);
818
819 /* update control register */
820
821 control = smc501_readl(fbi->regs + SM501_DC_PANEL_CONTROL);
822 control &= (SM501_DC_PANEL_CONTROL_GAMMA |
823 SM501_DC_PANEL_CONTROL_VDD |
824 SM501_DC_PANEL_CONTROL_DATA |
825 SM501_DC_PANEL_CONTROL_BIAS |
826 SM501_DC_PANEL_CONTROL_FPEN |
827 SM501_DC_PANEL_CONTROL_CP |
828 SM501_DC_PANEL_CONTROL_CK |
829 SM501_DC_PANEL_CONTROL_HP |
830 SM501_DC_PANEL_CONTROL_VP |
831 SM501_DC_PANEL_CONTROL_HPD |
832 SM501_DC_PANEL_CONTROL_VPD);
833
834 control |= SM501_FIFO_3; /* fill if >3 free slots */
835
836 switch(var->bits_per_pixel) {
837 case 8:
838 control |= SM501_DC_PANEL_CONTROL_8BPP;
839 break;
840
841 case 16:
842 control |= SM501_DC_PANEL_CONTROL_16BPP;
843 sm501fb_setup_gamma(fbi, SM501_DC_PANEL_PALETTE);
844 break;
845
846 case 32:
847 control |= SM501_DC_PANEL_CONTROL_32BPP;
848 sm501fb_setup_gamma(fbi, SM501_DC_PANEL_PALETTE);
849 break;
850
851 default:
852 BUG();
853 }
854
855 smc501_writel(0x0, fbi->regs + SM501_DC_PANEL_PANNING_CONTROL);
856
857 /* panel plane top left and bottom right location */
858
859 smc501_writel(0x00, fbi->regs + SM501_DC_PANEL_TL_LOC);
860
861 reg = var->xres - 1;
862 reg |= (var->yres - 1) << 16;
863
864 smc501_writel(reg, fbi->regs + SM501_DC_PANEL_BR_LOC);
865
866 /* program panel control register */
867
868 control |= SM501_DC_PANEL_CONTROL_TE; /* enable PANEL timing */
869 control |= SM501_DC_PANEL_CONTROL_EN; /* enable PANEL gfx plane */
870
871 if ((var->sync & FB_SYNC_HOR_HIGH_ACT) == 0)
872 control |= SM501_DC_PANEL_CONTROL_HSP;
873
874 if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0)
875 control |= SM501_DC_PANEL_CONTROL_VSP;
876
877 smc501_writel(control, fbi->regs + SM501_DC_PANEL_CONTROL);
878 sm501fb_sync_regs(fbi);
879
880 /* ensure the panel interface is not tristated at this point */
881
882 sm501_modify_reg(fbi->dev->parent, SM501_SYSTEM_CONTROL,
883 0, SM501_SYSCTRL_PANEL_TRISTATE);
884
885 /* power the panel up */
886 sm501fb_panel_power(fbi, 1);
887 return 0;
888 }
889
890
891 /* chan_to_field
892 *
893 * convert a colour value into a field position
894 *
895 * from pxafb.c
896 */
897
chan_to_field(unsigned int chan,struct fb_bitfield * bf)898 static inline unsigned int chan_to_field(unsigned int chan,
899 struct fb_bitfield *bf)
900 {
901 chan &= 0xffff;
902 chan >>= 16 - bf->length;
903 return chan << bf->offset;
904 }
905
906 /* sm501fb_setcolreg
907 *
908 * set the colour mapping for modes that support palettised data
909 */
910
sm501fb_setcolreg(unsigned regno,unsigned red,unsigned green,unsigned blue,unsigned transp,struct fb_info * info)911 static int sm501fb_setcolreg(unsigned regno,
912 unsigned red, unsigned green, unsigned blue,
913 unsigned transp, struct fb_info *info)
914 {
915 struct sm501fb_par *par = info->par;
916 struct sm501fb_info *fbi = par->info;
917 void __iomem *base = fbi->regs;
918 unsigned int val;
919
920 if (par->head == HEAD_CRT)
921 base += SM501_DC_CRT_PALETTE;
922 else
923 base += SM501_DC_PANEL_PALETTE;
924
925 switch (info->fix.visual) {
926 case FB_VISUAL_TRUECOLOR:
927 /* true-colour, use pseuo-palette */
928
929 if (regno < 16) {
930 u32 *pal = par->pseudo_palette;
931
932 val = chan_to_field(red, &info->var.red);
933 val |= chan_to_field(green, &info->var.green);
934 val |= chan_to_field(blue, &info->var.blue);
935
936 pal[regno] = val;
937 }
938 break;
939
940 case FB_VISUAL_PSEUDOCOLOR:
941 if (regno < 256) {
942 val = (red >> 8) << 16;
943 val |= (green >> 8) << 8;
944 val |= blue >> 8;
945
946 smc501_writel(val, base + (regno * 4));
947 }
948
949 break;
950
951 default:
952 return 1; /* unknown type */
953 }
954
955 return 0;
956 }
957
958 /* sm501fb_blank_pnl
959 *
960 * Blank or un-blank the panel interface
961 */
962
sm501fb_blank_pnl(int blank_mode,struct fb_info * info)963 static int sm501fb_blank_pnl(int blank_mode, struct fb_info *info)
964 {
965 struct sm501fb_par *par = info->par;
966 struct sm501fb_info *fbi = par->info;
967
968 dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info);
969
970 switch (blank_mode) {
971 case FB_BLANK_POWERDOWN:
972 sm501fb_panel_power(fbi, 0);
973 break;
974
975 case FB_BLANK_UNBLANK:
976 sm501fb_panel_power(fbi, 1);
977 break;
978
979 case FB_BLANK_NORMAL:
980 case FB_BLANK_VSYNC_SUSPEND:
981 case FB_BLANK_HSYNC_SUSPEND:
982 default:
983 return 1;
984 }
985
986 return 0;
987 }
988
989 /* sm501fb_blank_crt
990 *
991 * Blank or un-blank the crt interface
992 */
993
sm501fb_blank_crt(int blank_mode,struct fb_info * info)994 static int sm501fb_blank_crt(int blank_mode, struct fb_info *info)
995 {
996 struct sm501fb_par *par = info->par;
997 struct sm501fb_info *fbi = par->info;
998 unsigned long ctrl;
999
1000 dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info);
1001
1002 ctrl = smc501_readl(fbi->regs + SM501_DC_CRT_CONTROL);
1003
1004 switch (blank_mode) {
1005 case FB_BLANK_POWERDOWN:
1006 ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE;
1007 sm501_misc_control(fbi->dev->parent, SM501_MISC_DAC_POWER, 0);
1008 fallthrough;
1009
1010 case FB_BLANK_NORMAL:
1011 ctrl |= SM501_DC_CRT_CONTROL_BLANK;
1012 break;
1013
1014 case FB_BLANK_UNBLANK:
1015 ctrl &= ~SM501_DC_CRT_CONTROL_BLANK;
1016 ctrl |= SM501_DC_CRT_CONTROL_ENABLE;
1017 sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER);
1018 break;
1019
1020 case FB_BLANK_VSYNC_SUSPEND:
1021 case FB_BLANK_HSYNC_SUSPEND:
1022 default:
1023 return 1;
1024
1025 }
1026
1027 smc501_writel(ctrl, fbi->regs + SM501_DC_CRT_CONTROL);
1028 sm501fb_sync_regs(fbi);
1029
1030 return 0;
1031 }
1032
1033 /* sm501fb_cursor
1034 *
1035 * set or change the hardware cursor parameters
1036 */
1037
sm501fb_cursor(struct fb_info * info,struct fb_cursor * cursor)1038 static int sm501fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
1039 {
1040 struct sm501fb_par *par = info->par;
1041 struct sm501fb_info *fbi = par->info;
1042 void __iomem *base = fbi->regs;
1043 unsigned long hwc_addr;
1044 unsigned long fg, bg;
1045
1046 dev_dbg(fbi->dev, "%s(%p,%p)\n", __func__, info, cursor);
1047
1048 if (par->head == HEAD_CRT)
1049 base += SM501_DC_CRT_HWC_BASE;
1050 else
1051 base += SM501_DC_PANEL_HWC_BASE;
1052
1053 /* check not being asked to exceed capabilities */
1054
1055 if (cursor->image.width > 64)
1056 return -EINVAL;
1057
1058 if (cursor->image.height > 64)
1059 return -EINVAL;
1060
1061 if (cursor->image.depth > 1)
1062 return -EINVAL;
1063
1064 hwc_addr = smc501_readl(base + SM501_OFF_HWC_ADDR);
1065
1066 if (cursor->enable)
1067 smc501_writel(hwc_addr | SM501_HWC_EN,
1068 base + SM501_OFF_HWC_ADDR);
1069 else
1070 smc501_writel(hwc_addr & ~SM501_HWC_EN,
1071 base + SM501_OFF_HWC_ADDR);
1072
1073 /* set data */
1074 if (cursor->set & FB_CUR_SETPOS) {
1075 unsigned int x = cursor->image.dx;
1076 unsigned int y = cursor->image.dy;
1077
1078 if (x >= 2048 || y >= 2048 )
1079 return -EINVAL;
1080
1081 dev_dbg(fbi->dev, "set position %d,%d\n", x, y);
1082
1083 //y += cursor->image.height;
1084
1085 smc501_writel(x | (y << 16), base + SM501_OFF_HWC_LOC);
1086 }
1087
1088 if (cursor->set & FB_CUR_SETCMAP) {
1089 unsigned int bg_col = cursor->image.bg_color;
1090 unsigned int fg_col = cursor->image.fg_color;
1091
1092 dev_dbg(fbi->dev, "%s: update cmap (%08x,%08x)\n",
1093 __func__, bg_col, fg_col);
1094
1095 bg = ((info->cmap.red[bg_col] & 0xF8) << 8) |
1096 ((info->cmap.green[bg_col] & 0xFC) << 3) |
1097 ((info->cmap.blue[bg_col] & 0xF8) >> 3);
1098
1099 fg = ((info->cmap.red[fg_col] & 0xF8) << 8) |
1100 ((info->cmap.green[fg_col] & 0xFC) << 3) |
1101 ((info->cmap.blue[fg_col] & 0xF8) >> 3);
1102
1103 dev_dbg(fbi->dev, "fgcol %08lx, bgcol %08lx\n", fg, bg);
1104
1105 smc501_writel(bg, base + SM501_OFF_HWC_COLOR_1_2);
1106 smc501_writel(fg, base + SM501_OFF_HWC_COLOR_3);
1107 }
1108
1109 if (cursor->set & FB_CUR_SETSIZE ||
1110 cursor->set & (FB_CUR_SETIMAGE | FB_CUR_SETSHAPE)) {
1111 /* SM501 cursor is a two bpp 64x64 bitmap this routine
1112 * clears it to transparent then combines the cursor
1113 * shape plane with the colour plane to set the
1114 * cursor */
1115 int x, y;
1116 const unsigned char *pcol = cursor->image.data;
1117 const unsigned char *pmsk = cursor->mask;
1118 void __iomem *dst = par->cursor.k_addr;
1119 unsigned char dcol = 0;
1120 unsigned char dmsk = 0;
1121 unsigned int op;
1122
1123 dev_dbg(fbi->dev, "%s: setting shape (%d,%d)\n",
1124 __func__, cursor->image.width, cursor->image.height);
1125
1126 for (op = 0; op < (64*64*2)/8; op+=4)
1127 smc501_writel(0x0, dst + op);
1128
1129 for (y = 0; y < cursor->image.height; y++) {
1130 for (x = 0; x < cursor->image.width; x++) {
1131 if ((x % 8) == 0) {
1132 dcol = *pcol++;
1133 dmsk = *pmsk++;
1134 } else {
1135 dcol >>= 1;
1136 dmsk >>= 1;
1137 }
1138
1139 if (dmsk & 1) {
1140 op = (dcol & 1) ? 1 : 3;
1141 op <<= ((x % 4) * 2);
1142
1143 op |= readb(dst + (x / 4));
1144 writeb(op, dst + (x / 4));
1145 }
1146 }
1147 dst += (64*2)/8;
1148 }
1149 }
1150
1151 sm501fb_sync_regs(fbi); /* ensure cursor data flushed */
1152 return 0;
1153 }
1154
1155 /* sm501fb_crtsrc_show
1156 *
1157 * device attribute code to show where the crt output is sourced from
1158 */
1159
sm501fb_crtsrc_show(struct device * dev,struct device_attribute * attr,char * buf)1160 static ssize_t sm501fb_crtsrc_show(struct device *dev,
1161 struct device_attribute *attr, char *buf)
1162 {
1163 struct sm501fb_info *info = dev_get_drvdata(dev);
1164 unsigned long ctrl;
1165
1166 ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
1167 ctrl &= SM501_DC_CRT_CONTROL_SEL;
1168
1169 return sysfs_emit(buf, "%s\n", ctrl ? "crt" : "panel");
1170 }
1171
1172 /* sm501fb_crtsrc_show
1173 *
1174 * device attribute code to set where the crt output is sourced from
1175 */
1176
sm501fb_crtsrc_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t len)1177 static ssize_t sm501fb_crtsrc_store(struct device *dev,
1178 struct device_attribute *attr,
1179 const char *buf, size_t len)
1180 {
1181 struct sm501fb_info *info = dev_get_drvdata(dev);
1182 enum sm501_controller head;
1183 unsigned long ctrl;
1184
1185 if (len < 1)
1186 return -EINVAL;
1187
1188 if (strncasecmp(buf, "crt", 3) == 0)
1189 head = HEAD_CRT;
1190 else if (strncasecmp(buf, "panel", 5) == 0)
1191 head = HEAD_PANEL;
1192 else
1193 return -EINVAL;
1194
1195 dev_info(dev, "setting crt source to head %d\n", head);
1196
1197 ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
1198
1199 if (head == HEAD_CRT) {
1200 ctrl |= SM501_DC_CRT_CONTROL_SEL;
1201 ctrl |= SM501_DC_CRT_CONTROL_ENABLE;
1202 ctrl |= SM501_DC_CRT_CONTROL_TE;
1203 } else {
1204 ctrl &= ~SM501_DC_CRT_CONTROL_SEL;
1205 ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE;
1206 ctrl &= ~SM501_DC_CRT_CONTROL_TE;
1207 }
1208
1209 smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1210 sm501fb_sync_regs(info);
1211
1212 return len;
1213 }
1214
1215 /* Prepare the device_attr for registration with sysfs later */
1216 static DEVICE_ATTR(crt_src, 0664, sm501fb_crtsrc_show, sm501fb_crtsrc_store);
1217
1218 /* sm501fb_show_regs
1219 *
1220 * show the primary sm501 registers
1221 */
sm501fb_show_regs(struct sm501fb_info * info,char * ptr,unsigned int start,unsigned int len)1222 static int sm501fb_show_regs(struct sm501fb_info *info, char *ptr,
1223 unsigned int start, unsigned int len)
1224 {
1225 void __iomem *mem = info->regs;
1226 char *buf = ptr;
1227 unsigned int reg;
1228
1229 for (reg = start; reg < (len + start); reg += 4)
1230 ptr += sprintf(ptr, "%08x = %08x\n", reg,
1231 smc501_readl(mem + reg));
1232
1233 return ptr - buf;
1234 }
1235
1236 /* sm501fb_debug_show_crt
1237 *
1238 * show the crt control and cursor registers
1239 */
1240
sm501fb_debug_show_crt(struct device * dev,struct device_attribute * attr,char * buf)1241 static ssize_t sm501fb_debug_show_crt(struct device *dev,
1242 struct device_attribute *attr, char *buf)
1243 {
1244 struct sm501fb_info *info = dev_get_drvdata(dev);
1245 char *ptr = buf;
1246
1247 ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_CONTROL, 0x40);
1248 ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_HWC_BASE, 0x10);
1249
1250 return ptr - buf;
1251 }
1252
1253 static DEVICE_ATTR(fbregs_crt, 0444, sm501fb_debug_show_crt, NULL);
1254
1255 /* sm501fb_debug_show_pnl
1256 *
1257 * show the panel control and cursor registers
1258 */
1259
sm501fb_debug_show_pnl(struct device * dev,struct device_attribute * attr,char * buf)1260 static ssize_t sm501fb_debug_show_pnl(struct device *dev,
1261 struct device_attribute *attr, char *buf)
1262 {
1263 struct sm501fb_info *info = dev_get_drvdata(dev);
1264 char *ptr = buf;
1265
1266 ptr += sm501fb_show_regs(info, ptr, 0x0, 0x40);
1267 ptr += sm501fb_show_regs(info, ptr, SM501_DC_PANEL_HWC_BASE, 0x10);
1268
1269 return ptr - buf;
1270 }
1271
1272 static DEVICE_ATTR(fbregs_pnl, 0444, sm501fb_debug_show_pnl, NULL);
1273
1274 static struct attribute *sm501fb_attrs[] = {
1275 &dev_attr_crt_src.attr,
1276 &dev_attr_fbregs_pnl.attr,
1277 &dev_attr_fbregs_crt.attr,
1278 NULL,
1279 };
1280 ATTRIBUTE_GROUPS(sm501fb);
1281
1282 /* acceleration operations */
sm501fb_sync(struct fb_info * info)1283 static int sm501fb_sync(struct fb_info *info)
1284 {
1285 int count = 1000000;
1286 struct sm501fb_par *par = info->par;
1287 struct sm501fb_info *fbi = par->info;
1288
1289 /* wait for the 2d engine to be ready */
1290 while ((count > 0) &&
1291 (smc501_readl(fbi->regs + SM501_SYSTEM_CONTROL) &
1292 SM501_SYSCTRL_2D_ENGINE_STATUS) != 0)
1293 count--;
1294
1295 if (count <= 0) {
1296 fb_err(info, "Timeout waiting for 2d engine sync\n");
1297 return 1;
1298 }
1299 return 0;
1300 }
1301
sm501fb_copyarea(struct fb_info * info,const struct fb_copyarea * area)1302 static void sm501fb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
1303 {
1304 struct sm501fb_par *par = info->par;
1305 struct sm501fb_info *fbi = par->info;
1306 int width = area->width;
1307 int height = area->height;
1308 int sx = area->sx;
1309 int sy = area->sy;
1310 int dx = area->dx;
1311 int dy = area->dy;
1312 unsigned long rtl = 0;
1313
1314 /* source clip */
1315 if ((sx >= info->var.xres_virtual) ||
1316 (sy >= info->var.yres_virtual))
1317 /* source Area not within virtual screen, skipping */
1318 return;
1319 if ((sx + width) >= info->var.xres_virtual)
1320 width = info->var.xres_virtual - sx - 1;
1321 if ((sy + height) >= info->var.yres_virtual)
1322 height = info->var.yres_virtual - sy - 1;
1323
1324 /* dest clip */
1325 if ((dx >= info->var.xres_virtual) ||
1326 (dy >= info->var.yres_virtual))
1327 /* Destination Area not within virtual screen, skipping */
1328 return;
1329 if ((dx + width) >= info->var.xres_virtual)
1330 width = info->var.xres_virtual - dx - 1;
1331 if ((dy + height) >= info->var.yres_virtual)
1332 height = info->var.yres_virtual - dy - 1;
1333
1334 if ((sx < dx) || (sy < dy)) {
1335 rtl = 1 << 27;
1336 sx += width - 1;
1337 dx += width - 1;
1338 sy += height - 1;
1339 dy += height - 1;
1340 }
1341
1342 if (sm501fb_sync(info))
1343 return;
1344
1345 /* set the base addresses */
1346 smc501_writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE);
1347 smc501_writel(par->screen.sm_addr,
1348 fbi->regs2d + SM501_2D_DESTINATION_BASE);
1349
1350 /* set the window width */
1351 smc501_writel((info->var.xres << 16) | info->var.xres,
1352 fbi->regs2d + SM501_2D_WINDOW_WIDTH);
1353
1354 /* set window stride */
1355 smc501_writel((info->var.xres_virtual << 16) | info->var.xres_virtual,
1356 fbi->regs2d + SM501_2D_PITCH);
1357
1358 /* set data format */
1359 switch (info->var.bits_per_pixel) {
1360 case 8:
1361 smc501_writel(0, fbi->regs2d + SM501_2D_STRETCH);
1362 break;
1363 case 16:
1364 smc501_writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH);
1365 break;
1366 case 32:
1367 smc501_writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH);
1368 break;
1369 }
1370
1371 /* 2d compare mask */
1372 smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK);
1373
1374 /* 2d mask */
1375 smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_MASK);
1376
1377 /* source and destination x y */
1378 smc501_writel((sx << 16) | sy, fbi->regs2d + SM501_2D_SOURCE);
1379 smc501_writel((dx << 16) | dy, fbi->regs2d + SM501_2D_DESTINATION);
1380
1381 /* w/h */
1382 smc501_writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION);
1383
1384 /* do area move */
1385 smc501_writel(0x800000cc | rtl, fbi->regs2d + SM501_2D_CONTROL);
1386 }
1387
sm501fb_fillrect(struct fb_info * info,const struct fb_fillrect * rect)1388 static void sm501fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
1389 {
1390 struct sm501fb_par *par = info->par;
1391 struct sm501fb_info *fbi = par->info;
1392 int width = rect->width, height = rect->height;
1393
1394 if ((rect->dx >= info->var.xres_virtual) ||
1395 (rect->dy >= info->var.yres_virtual))
1396 /* Rectangle not within virtual screen, skipping */
1397 return;
1398 if ((rect->dx + width) >= info->var.xres_virtual)
1399 width = info->var.xres_virtual - rect->dx - 1;
1400 if ((rect->dy + height) >= info->var.yres_virtual)
1401 height = info->var.yres_virtual - rect->dy - 1;
1402
1403 if (sm501fb_sync(info))
1404 return;
1405
1406 /* set the base addresses */
1407 smc501_writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE);
1408 smc501_writel(par->screen.sm_addr,
1409 fbi->regs2d + SM501_2D_DESTINATION_BASE);
1410
1411 /* set the window width */
1412 smc501_writel((info->var.xres << 16) | info->var.xres,
1413 fbi->regs2d + SM501_2D_WINDOW_WIDTH);
1414
1415 /* set window stride */
1416 smc501_writel((info->var.xres_virtual << 16) | info->var.xres_virtual,
1417 fbi->regs2d + SM501_2D_PITCH);
1418
1419 /* set data format */
1420 switch (info->var.bits_per_pixel) {
1421 case 8:
1422 smc501_writel(0, fbi->regs2d + SM501_2D_STRETCH);
1423 break;
1424 case 16:
1425 smc501_writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH);
1426 break;
1427 case 32:
1428 smc501_writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH);
1429 break;
1430 }
1431
1432 /* 2d compare mask */
1433 smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK);
1434
1435 /* 2d mask */
1436 smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_MASK);
1437
1438 /* colour */
1439 smc501_writel(rect->color, fbi->regs2d + SM501_2D_FOREGROUND);
1440
1441 /* x y */
1442 smc501_writel((rect->dx << 16) | rect->dy,
1443 fbi->regs2d + SM501_2D_DESTINATION);
1444
1445 /* w/h */
1446 smc501_writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION);
1447
1448 /* do rectangle fill */
1449 smc501_writel(0x800100cc, fbi->regs2d + SM501_2D_CONTROL);
1450 }
1451
1452
1453 static struct fb_ops sm501fb_ops_crt = {
1454 .owner = THIS_MODULE,
1455 __FB_DEFAULT_IOMEM_OPS_RDWR,
1456 .fb_check_var = sm501fb_check_var_crt,
1457 .fb_set_par = sm501fb_set_par_crt,
1458 .fb_blank = sm501fb_blank_crt,
1459 .fb_setcolreg = sm501fb_setcolreg,
1460 .fb_pan_display = sm501fb_pan_crt,
1461 .fb_cursor = sm501fb_cursor,
1462 .fb_fillrect = sm501fb_fillrect,
1463 .fb_copyarea = sm501fb_copyarea,
1464 .fb_imageblit = cfb_imageblit,
1465 .fb_sync = sm501fb_sync,
1466 __FB_DEFAULT_IOMEM_OPS_MMAP,
1467 };
1468
1469 static struct fb_ops sm501fb_ops_pnl = {
1470 .owner = THIS_MODULE,
1471 __FB_DEFAULT_IOMEM_OPS_RDWR,
1472 .fb_check_var = sm501fb_check_var_pnl,
1473 .fb_set_par = sm501fb_set_par_pnl,
1474 .fb_pan_display = sm501fb_pan_pnl,
1475 .fb_blank = sm501fb_blank_pnl,
1476 .fb_setcolreg = sm501fb_setcolreg,
1477 .fb_cursor = sm501fb_cursor,
1478 .fb_fillrect = sm501fb_fillrect,
1479 .fb_copyarea = sm501fb_copyarea,
1480 .fb_imageblit = cfb_imageblit,
1481 .fb_sync = sm501fb_sync,
1482 __FB_DEFAULT_IOMEM_OPS_MMAP,
1483 };
1484
1485 /* sm501_init_cursor
1486 *
1487 * initialise hw cursor parameters
1488 */
1489
sm501_init_cursor(struct fb_info * fbi,unsigned int reg_base)1490 static int sm501_init_cursor(struct fb_info *fbi, unsigned int reg_base)
1491 {
1492 struct sm501fb_par *par;
1493 struct sm501fb_info *info;
1494 int ret;
1495
1496 if (fbi == NULL)
1497 return 0;
1498
1499 par = fbi->par;
1500 info = par->info;
1501
1502 par->cursor_regs = info->regs + reg_base;
1503
1504 ret = sm501_alloc_mem(info, &par->cursor, SM501_MEMF_CURSOR, 1024,
1505 fbi->fix.smem_len);
1506 if (ret < 0)
1507 return ret;
1508
1509 /* initialise the colour registers */
1510
1511 smc501_writel(par->cursor.sm_addr,
1512 par->cursor_regs + SM501_OFF_HWC_ADDR);
1513
1514 smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_LOC);
1515 smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_1_2);
1516 smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_3);
1517 sm501fb_sync_regs(info);
1518
1519 return 0;
1520 }
1521
1522 /* sm501fb_info_start
1523 *
1524 * fills the par structure claiming resources and remapping etc.
1525 */
1526
sm501fb_start(struct sm501fb_info * info,struct platform_device * pdev)1527 static int sm501fb_start(struct sm501fb_info *info,
1528 struct platform_device *pdev)
1529 {
1530 struct resource *res;
1531 struct device *dev = &pdev->dev;
1532 int k;
1533 int ret;
1534
1535 info->irq = ret = platform_get_irq(pdev, 0);
1536 if (ret < 0) {
1537 /* we currently do not use the IRQ */
1538 dev_warn(dev, "no irq for device\n");
1539 }
1540
1541 /* allocate, reserve and remap resources for display
1542 * controller registers */
1543 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1544 if (res == NULL) {
1545 dev_err(dev, "no resource definition for registers\n");
1546 ret = -ENOENT;
1547 goto err_release;
1548 }
1549
1550 info->regs_res = request_mem_region(res->start,
1551 resource_size(res),
1552 pdev->name);
1553
1554 if (info->regs_res == NULL) {
1555 dev_err(dev, "cannot claim registers\n");
1556 ret = -ENXIO;
1557 goto err_release;
1558 }
1559
1560 info->regs = ioremap(res->start, resource_size(res));
1561 if (info->regs == NULL) {
1562 dev_err(dev, "cannot remap registers\n");
1563 ret = -ENXIO;
1564 goto err_regs_res;
1565 }
1566
1567 /* allocate, reserve and remap resources for 2d
1568 * controller registers */
1569 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1570 if (res == NULL) {
1571 dev_err(dev, "no resource definition for 2d registers\n");
1572 ret = -ENOENT;
1573 goto err_regs_map;
1574 }
1575
1576 info->regs2d_res = request_mem_region(res->start,
1577 resource_size(res),
1578 pdev->name);
1579
1580 if (info->regs2d_res == NULL) {
1581 dev_err(dev, "cannot claim registers\n");
1582 ret = -ENXIO;
1583 goto err_regs_map;
1584 }
1585
1586 info->regs2d = ioremap(res->start, resource_size(res));
1587 if (info->regs2d == NULL) {
1588 dev_err(dev, "cannot remap registers\n");
1589 ret = -ENXIO;
1590 goto err_regs2d_res;
1591 }
1592
1593 /* allocate, reserve resources for framebuffer */
1594 res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
1595 if (res == NULL) {
1596 dev_err(dev, "no memory resource defined\n");
1597 ret = -ENXIO;
1598 goto err_regs2d_map;
1599 }
1600
1601 info->fbmem_res = request_mem_region(res->start,
1602 resource_size(res),
1603 pdev->name);
1604 if (info->fbmem_res == NULL) {
1605 dev_err(dev, "cannot claim framebuffer\n");
1606 ret = -ENXIO;
1607 goto err_regs2d_map;
1608 }
1609
1610 info->fbmem = ioremap(res->start, resource_size(res));
1611 if (info->fbmem == NULL) {
1612 dev_err(dev, "cannot remap framebuffer\n");
1613 ret = -ENXIO;
1614 goto err_mem_res;
1615 }
1616
1617 info->fbmem_len = resource_size(res);
1618
1619 /* clear framebuffer memory - avoids garbage data on unused fb */
1620 memset_io(info->fbmem, 0, info->fbmem_len);
1621
1622 /* clear palette ram - undefined at power on */
1623 for (k = 0; k < (256 * 3); k++)
1624 smc501_writel(0, info->regs + SM501_DC_PANEL_PALETTE + (k * 4));
1625
1626 /* enable display controller */
1627 sm501_unit_power(dev->parent, SM501_GATE_DISPLAY, 1);
1628
1629 /* enable 2d controller */
1630 sm501_unit_power(dev->parent, SM501_GATE_2D_ENGINE, 1);
1631
1632 /* setup cursors */
1633 sm501_init_cursor(info->fb[HEAD_CRT], SM501_DC_CRT_HWC_ADDR);
1634 sm501_init_cursor(info->fb[HEAD_PANEL], SM501_DC_PANEL_HWC_ADDR);
1635
1636 return 0; /* everything is setup */
1637
1638 err_mem_res:
1639 release_mem_region(info->fbmem_res->start,
1640 resource_size(info->fbmem_res));
1641
1642 err_regs2d_map:
1643 iounmap(info->regs2d);
1644
1645 err_regs2d_res:
1646 release_mem_region(info->regs2d_res->start,
1647 resource_size(info->regs2d_res));
1648
1649 err_regs_map:
1650 iounmap(info->regs);
1651
1652 err_regs_res:
1653 release_mem_region(info->regs_res->start,
1654 resource_size(info->regs_res));
1655
1656 err_release:
1657 return ret;
1658 }
1659
sm501fb_stop(struct sm501fb_info * info)1660 static void sm501fb_stop(struct sm501fb_info *info)
1661 {
1662 /* disable display controller */
1663 sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0);
1664
1665 iounmap(info->fbmem);
1666 release_mem_region(info->fbmem_res->start,
1667 resource_size(info->fbmem_res));
1668
1669 iounmap(info->regs2d);
1670 release_mem_region(info->regs2d_res->start,
1671 resource_size(info->regs2d_res));
1672
1673 iounmap(info->regs);
1674 release_mem_region(info->regs_res->start,
1675 resource_size(info->regs_res));
1676 }
1677
sm501fb_init_fb(struct fb_info * fb,enum sm501_controller head,const char * fbname)1678 static int sm501fb_init_fb(struct fb_info *fb, enum sm501_controller head,
1679 const char *fbname)
1680 {
1681 struct sm501_platdata_fbsub *pd;
1682 struct sm501fb_par *par = fb->par;
1683 struct sm501fb_info *info = par->info;
1684 unsigned long ctrl;
1685 unsigned int enable;
1686 int ret;
1687
1688 switch (head) {
1689 case HEAD_CRT:
1690 pd = info->pdata->fb_crt;
1691 ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
1692 enable = (ctrl & SM501_DC_CRT_CONTROL_ENABLE) ? 1 : 0;
1693
1694 /* ensure we set the correct source register */
1695 if (info->pdata->fb_route != SM501_FB_CRT_PANEL) {
1696 ctrl |= SM501_DC_CRT_CONTROL_SEL;
1697 smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1698 }
1699
1700 break;
1701
1702 case HEAD_PANEL:
1703 pd = info->pdata->fb_pnl;
1704 ctrl = smc501_readl(info->regs + SM501_DC_PANEL_CONTROL);
1705 enable = (ctrl & SM501_DC_PANEL_CONTROL_EN) ? 1 : 0;
1706 break;
1707
1708 default:
1709 pd = NULL; /* stop compiler warnings */
1710 ctrl = 0;
1711 enable = 0;
1712 BUG();
1713 }
1714
1715 dev_info(info->dev, "fb %s %sabled at start\n",
1716 fbname, enable ? "en" : "dis");
1717
1718 /* check to see if our routing allows this */
1719
1720 if (head == HEAD_CRT && info->pdata->fb_route == SM501_FB_CRT_PANEL) {
1721 ctrl &= ~SM501_DC_CRT_CONTROL_SEL;
1722 smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1723 enable = 0;
1724 }
1725
1726 strscpy(fb->fix.id, fbname, sizeof(fb->fix.id));
1727
1728 memcpy(&par->ops,
1729 (head == HEAD_CRT) ? &sm501fb_ops_crt : &sm501fb_ops_pnl,
1730 sizeof(struct fb_ops));
1731
1732 /* update ops dependent on what we've been passed */
1733
1734 if ((pd->flags & SM501FB_FLAG_USE_HWCURSOR) == 0)
1735 par->ops.fb_cursor = NULL;
1736
1737 fb->fbops = &par->ops;
1738 fb->flags = FBINFO_READS_FAST |
1739 FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT |
1740 FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN;
1741
1742 #if defined(CONFIG_OF)
1743 #ifdef __BIG_ENDIAN
1744 if (of_property_read_bool(info->dev->parent->of_node, "little-endian"))
1745 fb->flags |= FBINFO_FOREIGN_ENDIAN;
1746 #else
1747 if (of_property_read_bool(info->dev->parent->of_node, "big-endian"))
1748 fb->flags |= FBINFO_FOREIGN_ENDIAN;
1749 #endif
1750 #endif
1751 /* fixed data */
1752
1753 fb->fix.type = FB_TYPE_PACKED_PIXELS;
1754 fb->fix.type_aux = 0;
1755 fb->fix.xpanstep = 1;
1756 fb->fix.ypanstep = 1;
1757 fb->fix.ywrapstep = 0;
1758 fb->fix.accel = FB_ACCEL_NONE;
1759
1760 /* screenmode */
1761
1762 fb->var.nonstd = 0;
1763 fb->var.activate = FB_ACTIVATE_NOW;
1764 fb->var.accel_flags = 0;
1765 fb->var.vmode = FB_VMODE_NONINTERLACED;
1766 fb->var.bits_per_pixel = 16;
1767
1768 if (info->edid_data) {
1769 /* Now build modedb from EDID */
1770 fb_edid_to_monspecs(info->edid_data, &fb->monspecs);
1771 fb_videomode_to_modelist(fb->monspecs.modedb,
1772 fb->monspecs.modedb_len,
1773 &fb->modelist);
1774 }
1775
1776 if (enable && (pd->flags & SM501FB_FLAG_USE_INIT_MODE) && 0) {
1777 /* TODO read the mode from the current display */
1778 } else {
1779 if (pd->def_mode) {
1780 dev_info(info->dev, "using supplied mode\n");
1781 fb_videomode_to_var(&fb->var, pd->def_mode);
1782
1783 fb->var.bits_per_pixel = pd->def_bpp ? pd->def_bpp : 8;
1784 fb->var.xres_virtual = fb->var.xres;
1785 fb->var.yres_virtual = fb->var.yres;
1786 } else {
1787 if (info->edid_data) {
1788 ret = fb_find_mode(&fb->var, fb, fb_mode,
1789 fb->monspecs.modedb,
1790 fb->monspecs.modedb_len,
1791 &sm501_default_mode, default_bpp);
1792 /* edid_data is no longer needed, free it */
1793 kfree(info->edid_data);
1794 } else {
1795 ret = fb_find_mode(&fb->var, fb,
1796 NULL, NULL, 0, NULL, 8);
1797 }
1798
1799 switch (ret) {
1800 case 1:
1801 dev_info(info->dev, "using mode specified in "
1802 "@mode\n");
1803 break;
1804 case 2:
1805 dev_info(info->dev, "using mode specified in "
1806 "@mode with ignored refresh rate\n");
1807 break;
1808 case 3:
1809 dev_info(info->dev, "using mode default "
1810 "mode\n");
1811 break;
1812 case 4:
1813 dev_info(info->dev, "using mode from list\n");
1814 break;
1815 default:
1816 dev_info(info->dev, "ret = %d\n", ret);
1817 dev_info(info->dev, "failed to find mode\n");
1818 return -EINVAL;
1819 }
1820 }
1821 }
1822
1823 /* initialise and set the palette */
1824 if (fb_alloc_cmap(&fb->cmap, NR_PALETTE, 0)) {
1825 dev_err(info->dev, "failed to allocate cmap memory\n");
1826 return -ENOMEM;
1827 }
1828 fb_set_cmap(&fb->cmap, fb);
1829
1830 ret = (fb->fbops->fb_check_var)(&fb->var, fb);
1831 if (ret)
1832 dev_err(info->dev, "check_var() failed on initial setup?\n");
1833
1834 return 0;
1835 }
1836
1837 /* default platform data if none is supplied (ie, PCI device) */
1838
1839 static struct sm501_platdata_fbsub sm501fb_pdata_crt = {
1840 .flags = (SM501FB_FLAG_USE_INIT_MODE |
1841 SM501FB_FLAG_USE_HWCURSOR |
1842 SM501FB_FLAG_USE_HWACCEL |
1843 SM501FB_FLAG_DISABLE_AT_EXIT),
1844
1845 };
1846
1847 static struct sm501_platdata_fbsub sm501fb_pdata_pnl = {
1848 .flags = (SM501FB_FLAG_USE_INIT_MODE |
1849 SM501FB_FLAG_USE_HWCURSOR |
1850 SM501FB_FLAG_USE_HWACCEL |
1851 SM501FB_FLAG_DISABLE_AT_EXIT),
1852 };
1853
1854 static struct sm501_platdata_fb sm501fb_def_pdata = {
1855 .fb_route = SM501_FB_OWN,
1856 .fb_crt = &sm501fb_pdata_crt,
1857 .fb_pnl = &sm501fb_pdata_pnl,
1858 };
1859
1860 static char driver_name_crt[] = "sm501fb-crt";
1861 static char driver_name_pnl[] = "sm501fb-panel";
1862
sm501fb_probe_one(struct sm501fb_info * info,enum sm501_controller head)1863 static int sm501fb_probe_one(struct sm501fb_info *info,
1864 enum sm501_controller head)
1865 {
1866 unsigned char *name = (head == HEAD_CRT) ? "crt" : "panel";
1867 struct sm501_platdata_fbsub *pd;
1868 struct sm501fb_par *par;
1869 struct fb_info *fbi;
1870
1871 pd = (head == HEAD_CRT) ? info->pdata->fb_crt : info->pdata->fb_pnl;
1872
1873 /* Do not initialise if we've not been given any platform data */
1874 if (pd == NULL) {
1875 dev_info(info->dev, "no data for fb %s (disabled)\n", name);
1876 return 0;
1877 }
1878
1879 fbi = framebuffer_alloc(sizeof(struct sm501fb_par), info->dev);
1880 if (!fbi)
1881 return -ENOMEM;
1882
1883 par = fbi->par;
1884 par->info = info;
1885 par->head = head;
1886 fbi->pseudo_palette = &par->pseudo_palette;
1887
1888 info->fb[head] = fbi;
1889
1890 return 0;
1891 }
1892
1893 /* Free up anything allocated by sm501fb_init_fb */
1894
sm501_free_init_fb(struct sm501fb_info * info,enum sm501_controller head)1895 static void sm501_free_init_fb(struct sm501fb_info *info,
1896 enum sm501_controller head)
1897 {
1898 struct fb_info *fbi = info->fb[head];
1899
1900 if (!fbi)
1901 return;
1902
1903 fb_dealloc_cmap(&fbi->cmap);
1904 }
1905
sm501fb_start_one(struct sm501fb_info * info,enum sm501_controller head,const char * drvname)1906 static int sm501fb_start_one(struct sm501fb_info *info,
1907 enum sm501_controller head, const char *drvname)
1908 {
1909 struct fb_info *fbi = info->fb[head];
1910 int ret;
1911
1912 if (!fbi)
1913 return 0;
1914
1915 mutex_init(&info->fb[head]->mm_lock);
1916
1917 ret = sm501fb_init_fb(info->fb[head], head, drvname);
1918 if (ret) {
1919 dev_err(info->dev, "cannot initialise fb %s\n", drvname);
1920 return ret;
1921 }
1922
1923 ret = register_framebuffer(info->fb[head]);
1924 if (ret) {
1925 dev_err(info->dev, "failed to register fb %s\n", drvname);
1926 sm501_free_init_fb(info, head);
1927 return ret;
1928 }
1929
1930 dev_info(info->dev, "fb%d: %s frame buffer\n", fbi->node, fbi->fix.id);
1931
1932 return 0;
1933 }
1934
sm501fb_probe(struct platform_device * pdev)1935 static int sm501fb_probe(struct platform_device *pdev)
1936 {
1937 struct sm501fb_info *info;
1938 struct device *dev = &pdev->dev;
1939 int ret;
1940
1941 /* allocate our framebuffers */
1942 info = kzalloc(sizeof(*info), GFP_KERNEL);
1943 if (!info) {
1944 dev_err(dev, "failed to allocate state\n");
1945 return -ENOMEM;
1946 }
1947
1948 info->dev = dev = &pdev->dev;
1949 platform_set_drvdata(pdev, info);
1950
1951 if (dev->parent->platform_data) {
1952 struct sm501_platdata *pd = dev->parent->platform_data;
1953 info->pdata = pd->fb;
1954 }
1955
1956 if (info->pdata == NULL) {
1957 int found = 0;
1958 #if defined(CONFIG_OF)
1959 struct device_node *np = pdev->dev.parent->of_node;
1960 const u8 *prop;
1961 const char *cp;
1962 int len;
1963
1964 info->pdata = &sm501fb_def_pdata;
1965 if (np) {
1966 /* Get EDID */
1967 cp = of_get_property(np, "mode", &len);
1968 if (cp)
1969 strcpy(fb_mode, cp);
1970 prop = of_get_property(np, "edid", &len);
1971 if (prop && len == EDID_LENGTH) {
1972 info->edid_data = kmemdup(prop, EDID_LENGTH,
1973 GFP_KERNEL);
1974 if (info->edid_data)
1975 found = 1;
1976 }
1977 }
1978 #endif
1979 if (!found) {
1980 dev_info(dev, "using default configuration data\n");
1981 info->pdata = &sm501fb_def_pdata;
1982 }
1983 }
1984
1985 /* probe for the presence of each panel */
1986
1987 ret = sm501fb_probe_one(info, HEAD_CRT);
1988 if (ret < 0) {
1989 dev_err(dev, "failed to probe CRT\n");
1990 goto err_alloc;
1991 }
1992
1993 ret = sm501fb_probe_one(info, HEAD_PANEL);
1994 if (ret < 0) {
1995 dev_err(dev, "failed to probe PANEL\n");
1996 goto err_probed_crt;
1997 }
1998
1999 if (info->fb[HEAD_PANEL] == NULL &&
2000 info->fb[HEAD_CRT] == NULL) {
2001 dev_err(dev, "no framebuffers found\n");
2002 ret = -ENODEV;
2003 goto err_alloc;
2004 }
2005
2006 /* get the resources for both of the framebuffers */
2007
2008 ret = sm501fb_start(info, pdev);
2009 if (ret) {
2010 dev_err(dev, "cannot initialise SM501\n");
2011 goto err_probed_panel;
2012 }
2013
2014 ret = sm501fb_start_one(info, HEAD_CRT, driver_name_crt);
2015 if (ret) {
2016 dev_err(dev, "failed to start CRT\n");
2017 goto err_started;
2018 }
2019
2020 ret = sm501fb_start_one(info, HEAD_PANEL, driver_name_pnl);
2021 if (ret) {
2022 dev_err(dev, "failed to start Panel\n");
2023 goto err_started_crt;
2024 }
2025
2026 /* we registered, return ok */
2027 return 0;
2028
2029 err_started_crt:
2030 unregister_framebuffer(info->fb[HEAD_CRT]);
2031 sm501_free_init_fb(info, HEAD_CRT);
2032
2033 err_started:
2034 sm501fb_stop(info);
2035
2036 err_probed_panel:
2037 framebuffer_release(info->fb[HEAD_PANEL]);
2038
2039 err_probed_crt:
2040 framebuffer_release(info->fb[HEAD_CRT]);
2041
2042 err_alloc:
2043 kfree(info);
2044
2045 return ret;
2046 }
2047
2048
2049 /*
2050 * Cleanup
2051 */
sm501fb_remove(struct platform_device * pdev)2052 static void sm501fb_remove(struct platform_device *pdev)
2053 {
2054 struct sm501fb_info *info = platform_get_drvdata(pdev);
2055 struct fb_info *fbinfo_crt = info->fb[0];
2056 struct fb_info *fbinfo_pnl = info->fb[1];
2057
2058 sm501_free_init_fb(info, HEAD_CRT);
2059 sm501_free_init_fb(info, HEAD_PANEL);
2060
2061 if (fbinfo_crt)
2062 unregister_framebuffer(fbinfo_crt);
2063 if (fbinfo_pnl)
2064 unregister_framebuffer(fbinfo_pnl);
2065
2066 sm501fb_stop(info);
2067 kfree(info);
2068
2069 framebuffer_release(fbinfo_pnl);
2070 framebuffer_release(fbinfo_crt);
2071 }
2072
2073 #ifdef CONFIG_PM
2074
sm501fb_suspend_fb(struct sm501fb_info * info,enum sm501_controller head)2075 static int sm501fb_suspend_fb(struct sm501fb_info *info,
2076 enum sm501_controller head)
2077 {
2078 struct fb_info *fbi = info->fb[head];
2079 struct sm501fb_par *par;
2080
2081 if (!fbi)
2082 return 0;
2083
2084 par = fbi->par;
2085 if (par->screen.size == 0)
2086 return 0;
2087
2088 /* blank the relevant interface to ensure unit power minimised */
2089 (par->ops.fb_blank)(FB_BLANK_POWERDOWN, fbi);
2090
2091 /* tell console/fb driver we are suspending */
2092
2093 console_lock();
2094 fb_set_suspend(fbi, 1);
2095 console_unlock();
2096
2097 /* backup copies in case chip is powered down over suspend */
2098
2099 par->store_fb = vmalloc(par->screen.size);
2100 if (par->store_fb == NULL) {
2101 dev_err(info->dev, "no memory to store screen\n");
2102 return -ENOMEM;
2103 }
2104
2105 par->store_cursor = vmalloc(par->cursor.size);
2106 if (par->store_cursor == NULL) {
2107 dev_err(info->dev, "no memory to store cursor\n");
2108 goto err_nocursor;
2109 }
2110
2111 dev_dbg(info->dev, "suspending screen to %p\n", par->store_fb);
2112 dev_dbg(info->dev, "suspending cursor to %p\n", par->store_cursor);
2113
2114 memcpy_fromio(par->store_fb, par->screen.k_addr, par->screen.size);
2115 memcpy_fromio(par->store_cursor, par->cursor.k_addr, par->cursor.size);
2116
2117 return 0;
2118
2119 err_nocursor:
2120 vfree(par->store_fb);
2121 par->store_fb = NULL;
2122
2123 return -ENOMEM;
2124 }
2125
sm501fb_resume_fb(struct sm501fb_info * info,enum sm501_controller head)2126 static void sm501fb_resume_fb(struct sm501fb_info *info,
2127 enum sm501_controller head)
2128 {
2129 struct fb_info *fbi = info->fb[head];
2130 struct sm501fb_par *par;
2131
2132 if (!fbi)
2133 return;
2134
2135 par = fbi->par;
2136 if (par->screen.size == 0)
2137 return;
2138
2139 /* re-activate the configuration */
2140
2141 (par->ops.fb_set_par)(fbi);
2142
2143 /* restore the data */
2144
2145 dev_dbg(info->dev, "restoring screen from %p\n", par->store_fb);
2146 dev_dbg(info->dev, "restoring cursor from %p\n", par->store_cursor);
2147
2148 if (par->store_fb)
2149 memcpy_toio(par->screen.k_addr, par->store_fb,
2150 par->screen.size);
2151
2152 if (par->store_cursor)
2153 memcpy_toio(par->cursor.k_addr, par->store_cursor,
2154 par->cursor.size);
2155
2156 console_lock();
2157 fb_set_suspend(fbi, 0);
2158 console_unlock();
2159
2160 vfree(par->store_fb);
2161 vfree(par->store_cursor);
2162 }
2163
2164
2165 /* suspend and resume support */
2166
sm501fb_suspend(struct platform_device * pdev,pm_message_t state)2167 static int sm501fb_suspend(struct platform_device *pdev, pm_message_t state)
2168 {
2169 struct sm501fb_info *info = platform_get_drvdata(pdev);
2170
2171 /* store crt control to resume with */
2172 info->pm_crt_ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
2173
2174 sm501fb_suspend_fb(info, HEAD_CRT);
2175 sm501fb_suspend_fb(info, HEAD_PANEL);
2176
2177 /* turn off the clocks, in case the device is not powered down */
2178 sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0);
2179
2180 return 0;
2181 }
2182
2183 #define SM501_CRT_CTRL_SAVE (SM501_DC_CRT_CONTROL_TVP | \
2184 SM501_DC_CRT_CONTROL_SEL)
2185
2186
sm501fb_resume(struct platform_device * pdev)2187 static int sm501fb_resume(struct platform_device *pdev)
2188 {
2189 struct sm501fb_info *info = platform_get_drvdata(pdev);
2190 unsigned long crt_ctrl;
2191
2192 sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 1);
2193
2194 /* restore the items we want to be saved for crt control */
2195
2196 crt_ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
2197 crt_ctrl &= ~SM501_CRT_CTRL_SAVE;
2198 crt_ctrl |= info->pm_crt_ctrl & SM501_CRT_CTRL_SAVE;
2199 smc501_writel(crt_ctrl, info->regs + SM501_DC_CRT_CONTROL);
2200
2201 sm501fb_resume_fb(info, HEAD_CRT);
2202 sm501fb_resume_fb(info, HEAD_PANEL);
2203
2204 return 0;
2205 }
2206
2207 #else
2208 #define sm501fb_suspend NULL
2209 #define sm501fb_resume NULL
2210 #endif
2211
2212 static struct platform_driver sm501fb_driver = {
2213 .probe = sm501fb_probe,
2214 .remove = sm501fb_remove,
2215 .suspend = sm501fb_suspend,
2216 .resume = sm501fb_resume,
2217 .driver = {
2218 .name = "sm501-fb",
2219 .dev_groups = sm501fb_groups,
2220 },
2221 };
2222
2223 module_platform_driver(sm501fb_driver);
2224
2225 module_param_named(mode, fb_mode, charp, 0);
2226 MODULE_PARM_DESC(mode,
2227 "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
2228 module_param_named(bpp, default_bpp, ulong, 0);
2229 MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified mode");
2230 MODULE_AUTHOR("Ben Dooks, Vincent Sanders");
2231 MODULE_DESCRIPTION("SM501 Framebuffer driver");
2232 MODULE_LICENSE("GPL v2");
2233