1 /*
2 * Epson Blizzard LCD controller driver
3 *
4 * Copyright (C) 2004-2005 Nokia Corporation
5 * Authors: Juha Yrjola <juha.yrjola@nokia.com>
6 * Imre Deak <imre.deak@nokia.com>
7 * YUV support: Jussi Laako <jussi.laako@nokia.com>
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 */
23 #include <linux/module.h>
24 #include <linux/mm.h>
25 #include <linux/fb.h>
26 #include <linux/delay.h>
27 #include <linux/clk.h>
28
29 #include <plat/dma.h>
30 #include <plat/blizzard.h>
31
32 #include "omapfb.h"
33 #include "dispc.h"
34
35 #define MODULE_NAME "blizzard"
36
37 #define BLIZZARD_REV_CODE 0x00
38 #define BLIZZARD_CONFIG 0x02
39 #define BLIZZARD_PLL_DIV 0x04
40 #define BLIZZARD_PLL_LOCK_RANGE 0x06
41 #define BLIZZARD_PLL_CLOCK_SYNTH_0 0x08
42 #define BLIZZARD_PLL_CLOCK_SYNTH_1 0x0a
43 #define BLIZZARD_PLL_MODE 0x0c
44 #define BLIZZARD_CLK_SRC 0x0e
45 #define BLIZZARD_MEM_BANK0_ACTIVATE 0x10
46 #define BLIZZARD_MEM_BANK0_STATUS 0x14
47 #define BLIZZARD_PANEL_CONFIGURATION 0x28
48 #define BLIZZARD_HDISP 0x2a
49 #define BLIZZARD_HNDP 0x2c
50 #define BLIZZARD_VDISP0 0x2e
51 #define BLIZZARD_VDISP1 0x30
52 #define BLIZZARD_VNDP 0x32
53 #define BLIZZARD_HSW 0x34
54 #define BLIZZARD_VSW 0x38
55 #define BLIZZARD_DISPLAY_MODE 0x68
56 #define BLIZZARD_INPUT_WIN_X_START_0 0x6c
57 #define BLIZZARD_DATA_SOURCE_SELECT 0x8e
58 #define BLIZZARD_DISP_MEM_DATA_PORT 0x90
59 #define BLIZZARD_DISP_MEM_READ_ADDR0 0x92
60 #define BLIZZARD_POWER_SAVE 0xE6
61 #define BLIZZARD_NDISP_CTRL_STATUS 0xE8
62
63 /* Data source select */
64 /* For S1D13745 */
65 #define BLIZZARD_SRC_WRITE_LCD_BACKGROUND 0x00
66 #define BLIZZARD_SRC_WRITE_LCD_DESTRUCTIVE 0x01
67 #define BLIZZARD_SRC_WRITE_OVERLAY_ENABLE 0x04
68 #define BLIZZARD_SRC_DISABLE_OVERLAY 0x05
69 /* For S1D13744 */
70 #define BLIZZARD_SRC_WRITE_LCD 0x00
71 #define BLIZZARD_SRC_BLT_LCD 0x06
72
73 #define BLIZZARD_COLOR_RGB565 0x01
74 #define BLIZZARD_COLOR_YUV420 0x09
75
76 #define BLIZZARD_VERSION_S1D13745 0x01 /* Hailstorm */
77 #define BLIZZARD_VERSION_S1D13744 0x02 /* Blizzard */
78
79 #define BLIZZARD_AUTO_UPDATE_TIME (HZ / 20)
80
81 /* Reserve 4 request slots for requests in irq context */
82 #define REQ_POOL_SIZE 24
83 #define IRQ_REQ_POOL_SIZE 4
84
85 #define REQ_FROM_IRQ_POOL 0x01
86
87 #define REQ_COMPLETE 0
88 #define REQ_PENDING 1
89
90 struct blizzard_reg_list {
91 int start;
92 int end;
93 };
94
95 /* These need to be saved / restored separately from the rest. */
96 static const struct blizzard_reg_list blizzard_pll_regs[] = {
97 {
98 .start = 0x04, /* Don't save PLL ctrl (0x0C) */
99 .end = 0x0a,
100 },
101 {
102 .start = 0x0e, /* Clock configuration */
103 .end = 0x0e,
104 },
105 };
106
107 static const struct blizzard_reg_list blizzard_gen_regs[] = {
108 {
109 .start = 0x18, /* SDRAM control */
110 .end = 0x20,
111 },
112 {
113 .start = 0x28, /* LCD Panel configuration */
114 .end = 0x5a, /* HSSI interface, TV configuration */
115 },
116 };
117
118 static u8 blizzard_reg_cache[0x5a / 2];
119
120 struct update_param {
121 int plane;
122 int x, y, width, height;
123 int out_x, out_y;
124 int out_width, out_height;
125 int color_mode;
126 int bpp;
127 int flags;
128 };
129
130 struct blizzard_request {
131 struct list_head entry;
132 unsigned int flags;
133
134 int (*handler)(struct blizzard_request *req);
135 void (*complete)(void *data);
136 void *complete_data;
137
138 union {
139 struct update_param update;
140 struct completion *sync;
141 } par;
142 };
143
144 struct plane_info {
145 unsigned long offset;
146 int pos_x, pos_y;
147 int width, height;
148 int out_width, out_height;
149 int scr_width;
150 int color_mode;
151 int bpp;
152 };
153
154 struct blizzard_struct {
155 enum omapfb_update_mode update_mode;
156 enum omapfb_update_mode update_mode_before_suspend;
157
158 struct timer_list auto_update_timer;
159 int stop_auto_update;
160 struct omapfb_update_window auto_update_window;
161 int enabled_planes;
162 int vid_nonstd_color;
163 int vid_scaled;
164 int last_color_mode;
165 int zoom_on;
166 int zoom_area_gx1;
167 int zoom_area_gx2;
168 int zoom_area_gy1;
169 int zoom_area_gy2;
170 int screen_width;
171 int screen_height;
172 unsigned te_connected:1;
173 unsigned vsync_only:1;
174
175 struct plane_info plane[OMAPFB_PLANE_NUM];
176
177 struct blizzard_request req_pool[REQ_POOL_SIZE];
178 struct list_head pending_req_list;
179 struct list_head free_req_list;
180 struct semaphore req_sema;
181 spinlock_t req_lock;
182
183 unsigned long sys_ck_rate;
184 struct extif_timings reg_timings, lut_timings;
185
186 u32 max_transmit_size;
187 u32 extif_clk_period;
188 int extif_clk_div;
189 unsigned long pix_tx_time;
190 unsigned long line_upd_time;
191
192 struct omapfb_device *fbdev;
193 struct lcd_ctrl_extif *extif;
194 const struct lcd_ctrl *int_ctrl;
195
196 void (*power_up)(struct device *dev);
197 void (*power_down)(struct device *dev);
198
199 int version;
200 } blizzard;
201
202 struct lcd_ctrl blizzard_ctrl;
203
blizzard_read_reg(u8 reg)204 static u8 blizzard_read_reg(u8 reg)
205 {
206 u8 data;
207
208 blizzard.extif->set_bits_per_cycle(8);
209 blizzard.extif->write_command(®, 1);
210 blizzard.extif->read_data(&data, 1);
211
212 return data;
213 }
214
blizzard_write_reg(u8 reg,u8 val)215 static void blizzard_write_reg(u8 reg, u8 val)
216 {
217 blizzard.extif->set_bits_per_cycle(8);
218 blizzard.extif->write_command(®, 1);
219 blizzard.extif->write_data(&val, 1);
220 }
221
blizzard_restart_sdram(void)222 static void blizzard_restart_sdram(void)
223 {
224 unsigned long tmo;
225
226 blizzard_write_reg(BLIZZARD_MEM_BANK0_ACTIVATE, 0);
227 udelay(50);
228 blizzard_write_reg(BLIZZARD_MEM_BANK0_ACTIVATE, 1);
229 tmo = jiffies + msecs_to_jiffies(200);
230 while (!(blizzard_read_reg(BLIZZARD_MEM_BANK0_STATUS) & 0x01)) {
231 if (time_after(jiffies, tmo)) {
232 dev_err(blizzard.fbdev->dev,
233 "s1d1374x: SDRAM not ready\n");
234 break;
235 }
236 msleep(1);
237 }
238 }
239
blizzard_stop_sdram(void)240 static void blizzard_stop_sdram(void)
241 {
242 blizzard_write_reg(BLIZZARD_MEM_BANK0_ACTIVATE, 0);
243 }
244
245 /* Wait until the last window was completely written into the controllers
246 * SDRAM and we can start transferring the next window.
247 */
blizzard_wait_line_buffer(void)248 static void blizzard_wait_line_buffer(void)
249 {
250 unsigned long tmo = jiffies + msecs_to_jiffies(30);
251
252 while (blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS) & (1 << 7)) {
253 if (time_after(jiffies, tmo)) {
254 if (printk_ratelimit())
255 dev_err(blizzard.fbdev->dev,
256 "s1d1374x: line buffer not ready\n");
257 break;
258 }
259 }
260 }
261
262 /* Wait until the YYC color space converter is idle. */
blizzard_wait_yyc(void)263 static void blizzard_wait_yyc(void)
264 {
265 unsigned long tmo = jiffies + msecs_to_jiffies(30);
266
267 while (blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS) & (1 << 4)) {
268 if (time_after(jiffies, tmo)) {
269 if (printk_ratelimit())
270 dev_err(blizzard.fbdev->dev,
271 "s1d1374x: YYC not ready\n");
272 break;
273 }
274 }
275 }
276
disable_overlay(void)277 static void disable_overlay(void)
278 {
279 blizzard_write_reg(BLIZZARD_DATA_SOURCE_SELECT,
280 BLIZZARD_SRC_DISABLE_OVERLAY);
281 }
282
set_window_regs(int x_start,int y_start,int x_end,int y_end,int x_out_start,int y_out_start,int x_out_end,int y_out_end,int color_mode,int zoom_off,int flags)283 static void set_window_regs(int x_start, int y_start, int x_end, int y_end,
284 int x_out_start, int y_out_start,
285 int x_out_end, int y_out_end, int color_mode,
286 int zoom_off, int flags)
287 {
288 u8 tmp[18];
289 u8 cmd;
290
291 x_end--;
292 y_end--;
293 tmp[0] = x_start;
294 tmp[1] = x_start >> 8;
295 tmp[2] = y_start;
296 tmp[3] = y_start >> 8;
297 tmp[4] = x_end;
298 tmp[5] = x_end >> 8;
299 tmp[6] = y_end;
300 tmp[7] = y_end >> 8;
301
302 x_out_end--;
303 y_out_end--;
304 tmp[8] = x_out_start;
305 tmp[9] = x_out_start >> 8;
306 tmp[10] = y_out_start;
307 tmp[11] = y_out_start >> 8;
308 tmp[12] = x_out_end;
309 tmp[13] = x_out_end >> 8;
310 tmp[14] = y_out_end;
311 tmp[15] = y_out_end >> 8;
312
313 tmp[16] = color_mode;
314 if (zoom_off && blizzard.version == BLIZZARD_VERSION_S1D13745)
315 tmp[17] = BLIZZARD_SRC_WRITE_LCD_BACKGROUND;
316 else if (flags & OMAPFB_FORMAT_FLAG_ENABLE_OVERLAY)
317 tmp[17] = BLIZZARD_SRC_WRITE_OVERLAY_ENABLE;
318 else
319 tmp[17] = blizzard.version == BLIZZARD_VERSION_S1D13744 ?
320 BLIZZARD_SRC_WRITE_LCD :
321 BLIZZARD_SRC_WRITE_LCD_DESTRUCTIVE;
322
323 blizzard.extif->set_bits_per_cycle(8);
324 cmd = BLIZZARD_INPUT_WIN_X_START_0;
325 blizzard.extif->write_command(&cmd, 1);
326 blizzard.extif->write_data(tmp, 18);
327 }
328
enable_tearsync(int y,int width,int height,int screen_height,int out_height,int force_vsync)329 static void enable_tearsync(int y, int width, int height, int screen_height,
330 int out_height, int force_vsync)
331 {
332 u8 b;
333
334 b = blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS);
335 b |= 1 << 3;
336 blizzard_write_reg(BLIZZARD_NDISP_CTRL_STATUS, b);
337
338 if (likely(blizzard.vsync_only || force_vsync)) {
339 blizzard.extif->enable_tearsync(1, 0);
340 return;
341 }
342
343 if (width * blizzard.pix_tx_time < blizzard.line_upd_time) {
344 blizzard.extif->enable_tearsync(1, 0);
345 return;
346 }
347
348 if ((width * blizzard.pix_tx_time / 1000) * height <
349 (y + out_height) * (blizzard.line_upd_time / 1000)) {
350 blizzard.extif->enable_tearsync(1, 0);
351 return;
352 }
353
354 blizzard.extif->enable_tearsync(1, y + 1);
355 }
356
disable_tearsync(void)357 static void disable_tearsync(void)
358 {
359 u8 b;
360
361 blizzard.extif->enable_tearsync(0, 0);
362 b = blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS);
363 b &= ~(1 << 3);
364 blizzard_write_reg(BLIZZARD_NDISP_CTRL_STATUS, b);
365 b = blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS);
366 }
367
368 static inline void set_extif_timings(const struct extif_timings *t);
369
alloc_req(void)370 static inline struct blizzard_request *alloc_req(void)
371 {
372 unsigned long flags;
373 struct blizzard_request *req;
374 int req_flags = 0;
375
376 if (!in_interrupt())
377 down(&blizzard.req_sema);
378 else
379 req_flags = REQ_FROM_IRQ_POOL;
380
381 spin_lock_irqsave(&blizzard.req_lock, flags);
382 BUG_ON(list_empty(&blizzard.free_req_list));
383 req = list_entry(blizzard.free_req_list.next,
384 struct blizzard_request, entry);
385 list_del(&req->entry);
386 spin_unlock_irqrestore(&blizzard.req_lock, flags);
387
388 INIT_LIST_HEAD(&req->entry);
389 req->flags = req_flags;
390
391 return req;
392 }
393
free_req(struct blizzard_request * req)394 static inline void free_req(struct blizzard_request *req)
395 {
396 unsigned long flags;
397
398 spin_lock_irqsave(&blizzard.req_lock, flags);
399
400 list_move(&req->entry, &blizzard.free_req_list);
401 if (!(req->flags & REQ_FROM_IRQ_POOL))
402 up(&blizzard.req_sema);
403
404 spin_unlock_irqrestore(&blizzard.req_lock, flags);
405 }
406
process_pending_requests(void)407 static void process_pending_requests(void)
408 {
409 unsigned long flags;
410
411 spin_lock_irqsave(&blizzard.req_lock, flags);
412
413 while (!list_empty(&blizzard.pending_req_list)) {
414 struct blizzard_request *req;
415 void (*complete)(void *);
416 void *complete_data;
417
418 req = list_entry(blizzard.pending_req_list.next,
419 struct blizzard_request, entry);
420 spin_unlock_irqrestore(&blizzard.req_lock, flags);
421
422 if (req->handler(req) == REQ_PENDING)
423 return;
424
425 complete = req->complete;
426 complete_data = req->complete_data;
427 free_req(req);
428
429 if (complete)
430 complete(complete_data);
431
432 spin_lock_irqsave(&blizzard.req_lock, flags);
433 }
434
435 spin_unlock_irqrestore(&blizzard.req_lock, flags);
436 }
437
submit_req_list(struct list_head * head)438 static void submit_req_list(struct list_head *head)
439 {
440 unsigned long flags;
441 int process = 1;
442
443 spin_lock_irqsave(&blizzard.req_lock, flags);
444 if (likely(!list_empty(&blizzard.pending_req_list)))
445 process = 0;
446 list_splice_init(head, blizzard.pending_req_list.prev);
447 spin_unlock_irqrestore(&blizzard.req_lock, flags);
448
449 if (process)
450 process_pending_requests();
451 }
452
request_complete(void * data)453 static void request_complete(void *data)
454 {
455 struct blizzard_request *req = (struct blizzard_request *)data;
456 void (*complete)(void *);
457 void *complete_data;
458
459 complete = req->complete;
460 complete_data = req->complete_data;
461
462 free_req(req);
463
464 if (complete)
465 complete(complete_data);
466
467 process_pending_requests();
468 }
469
470
do_full_screen_update(struct blizzard_request * req)471 static int do_full_screen_update(struct blizzard_request *req)
472 {
473 int i;
474 int flags;
475
476 for (i = 0; i < 3; i++) {
477 struct plane_info *p = &blizzard.plane[i];
478 if (!(blizzard.enabled_planes & (1 << i))) {
479 blizzard.int_ctrl->enable_plane(i, 0);
480 continue;
481 }
482 dev_dbg(blizzard.fbdev->dev, "pw %d ph %d\n",
483 p->width, p->height);
484 blizzard.int_ctrl->setup_plane(i,
485 OMAPFB_CHANNEL_OUT_LCD, p->offset,
486 p->scr_width, p->pos_x, p->pos_y,
487 p->width, p->height,
488 p->color_mode);
489 blizzard.int_ctrl->enable_plane(i, 1);
490 }
491
492 dev_dbg(blizzard.fbdev->dev, "sw %d sh %d\n",
493 blizzard.screen_width, blizzard.screen_height);
494 blizzard_wait_line_buffer();
495 flags = req->par.update.flags;
496 if (flags & OMAPFB_FORMAT_FLAG_TEARSYNC)
497 enable_tearsync(0, blizzard.screen_width,
498 blizzard.screen_height,
499 blizzard.screen_height,
500 blizzard.screen_height,
501 flags & OMAPFB_FORMAT_FLAG_FORCE_VSYNC);
502 else
503 disable_tearsync();
504
505 set_window_regs(0, 0, blizzard.screen_width, blizzard.screen_height,
506 0, 0, blizzard.screen_width, blizzard.screen_height,
507 BLIZZARD_COLOR_RGB565, blizzard.zoom_on, flags);
508 blizzard.zoom_on = 0;
509
510 blizzard.extif->set_bits_per_cycle(16);
511 /* set_window_regs has left the register index at the right
512 * place, so no need to set it here.
513 */
514 blizzard.extif->transfer_area(blizzard.screen_width,
515 blizzard.screen_height,
516 request_complete, req);
517 return REQ_PENDING;
518 }
519
check_1d_intersect(int a1,int a2,int b1,int b2)520 static int check_1d_intersect(int a1, int a2, int b1, int b2)
521 {
522 if (a2 <= b1 || b2 <= a1)
523 return 0;
524 return 1;
525 }
526
527 /* Setup all planes with an overlapping area with the update window. */
do_partial_update(struct blizzard_request * req,int plane,int x,int y,int w,int h,int x_out,int y_out,int w_out,int h_out,int wnd_color_mode,int bpp)528 static int do_partial_update(struct blizzard_request *req, int plane,
529 int x, int y, int w, int h,
530 int x_out, int y_out, int w_out, int h_out,
531 int wnd_color_mode, int bpp)
532 {
533 int i;
534 int gx1, gy1, gx2, gy2;
535 int gx1_out, gy1_out, gx2_out, gy2_out;
536 int color_mode;
537 int flags;
538 int zoom_off;
539 int have_zoom_for_this_update = 0;
540
541 /* Global coordinates, relative to pixel 0,0 of the LCD */
542 gx1 = x + blizzard.plane[plane].pos_x;
543 gy1 = y + blizzard.plane[plane].pos_y;
544 gx2 = gx1 + w;
545 gy2 = gy1 + h;
546
547 flags = req->par.update.flags;
548 if (flags & OMAPFB_FORMAT_FLAG_DOUBLE) {
549 gx1_out = gx1;
550 gy1_out = gy1;
551 gx2_out = gx1 + w * 2;
552 gy2_out = gy1 + h * 2;
553 } else {
554 gx1_out = x_out + blizzard.plane[plane].pos_x;
555 gy1_out = y_out + blizzard.plane[plane].pos_y;
556 gx2_out = gx1_out + w_out;
557 gy2_out = gy1_out + h_out;
558 }
559
560 for (i = 0; i < OMAPFB_PLANE_NUM; i++) {
561 struct plane_info *p = &blizzard.plane[i];
562 int px1, py1;
563 int px2, py2;
564 int pw, ph;
565 int pposx, pposy;
566 unsigned long offset;
567
568 if (!(blizzard.enabled_planes & (1 << i)) ||
569 (wnd_color_mode && i != plane)) {
570 blizzard.int_ctrl->enable_plane(i, 0);
571 continue;
572 }
573 /* Plane coordinates */
574 if (i == plane) {
575 /* Plane in which we are doing the update.
576 * Local coordinates are the one in the update
577 * request.
578 */
579 px1 = x;
580 py1 = y;
581 px2 = x + w;
582 py2 = y + h;
583 pposx = 0;
584 pposy = 0;
585 } else {
586 /* Check if this plane has an overlapping part */
587 px1 = gx1 - p->pos_x;
588 py1 = gy1 - p->pos_y;
589 px2 = gx2 - p->pos_x;
590 py2 = gy2 - p->pos_y;
591 if (px1 >= p->width || py1 >= p->height ||
592 px2 <= 0 || py2 <= 0) {
593 blizzard.int_ctrl->enable_plane(i, 0);
594 continue;
595 }
596 /* Calculate the coordinates for the overlapping
597 * part in the plane's local coordinates.
598 */
599 pposx = -px1;
600 pposy = -py1;
601 if (px1 < 0)
602 px1 = 0;
603 if (py1 < 0)
604 py1 = 0;
605 if (px2 > p->width)
606 px2 = p->width;
607 if (py2 > p->height)
608 py2 = p->height;
609 if (pposx < 0)
610 pposx = 0;
611 if (pposy < 0)
612 pposy = 0;
613 }
614 pw = px2 - px1;
615 ph = py2 - py1;
616 offset = p->offset + (p->scr_width * py1 + px1) * p->bpp / 8;
617 if (wnd_color_mode)
618 /* Window embedded in the plane with a differing
619 * color mode / bpp. Calculate the number of DMA
620 * transfer elements in terms of the plane's bpp.
621 */
622 pw = (pw + 1) * bpp / p->bpp;
623 #ifdef VERBOSE
624 dev_dbg(blizzard.fbdev->dev,
625 "plane %d offset %#08lx pposx %d pposy %d "
626 "px1 %d py1 %d pw %d ph %d\n",
627 i, offset, pposx, pposy, px1, py1, pw, ph);
628 #endif
629 blizzard.int_ctrl->setup_plane(i,
630 OMAPFB_CHANNEL_OUT_LCD, offset,
631 p->scr_width,
632 pposx, pposy, pw, ph,
633 p->color_mode);
634
635 blizzard.int_ctrl->enable_plane(i, 1);
636 }
637
638 switch (wnd_color_mode) {
639 case OMAPFB_COLOR_YUV420:
640 color_mode = BLIZZARD_COLOR_YUV420;
641 /* Currently only the 16 bits/pixel cycle format is
642 * supported on the external interface. Adjust the number
643 * of transfer elements per line for 12bpp format.
644 */
645 w = (w + 1) * 3 / 4;
646 break;
647 default:
648 color_mode = BLIZZARD_COLOR_RGB565;
649 break;
650 }
651
652 blizzard_wait_line_buffer();
653 if (blizzard.last_color_mode == BLIZZARD_COLOR_YUV420)
654 blizzard_wait_yyc();
655 blizzard.last_color_mode = color_mode;
656 if (flags & OMAPFB_FORMAT_FLAG_TEARSYNC)
657 enable_tearsync(gy1, w, h,
658 blizzard.screen_height,
659 h_out,
660 flags & OMAPFB_FORMAT_FLAG_FORCE_VSYNC);
661 else
662 disable_tearsync();
663
664 if ((gx2_out - gx1_out) != (gx2 - gx1) ||
665 (gy2_out - gy1_out) != (gy2 - gy1))
666 have_zoom_for_this_update = 1;
667
668 /* 'background' type of screen update (as opposed to 'destructive')
669 can be used to disable scaling if scaling is active */
670 zoom_off = blizzard.zoom_on && !have_zoom_for_this_update &&
671 (gx1_out == 0) && (gx2_out == blizzard.screen_width) &&
672 (gy1_out == 0) && (gy2_out == blizzard.screen_height) &&
673 (gx1 == 0) && (gy1 == 0);
674
675 if (blizzard.zoom_on && !have_zoom_for_this_update && !zoom_off &&
676 check_1d_intersect(blizzard.zoom_area_gx1, blizzard.zoom_area_gx2,
677 gx1_out, gx2_out) &&
678 check_1d_intersect(blizzard.zoom_area_gy1, blizzard.zoom_area_gy2,
679 gy1_out, gy2_out)) {
680 /* Previous screen update was using scaling, current update
681 * is not using it. Additionally, current screen update is
682 * going to overlap with the scaled area. Scaling needs to be
683 * disabled in order to avoid 'magnifying glass' effect.
684 * Dummy setup of background window can be used for this.
685 */
686 set_window_regs(0, 0, blizzard.screen_width,
687 blizzard.screen_height,
688 0, 0, blizzard.screen_width,
689 blizzard.screen_height,
690 BLIZZARD_COLOR_RGB565, 1, flags);
691 blizzard.zoom_on = 0;
692 }
693
694 /* remember scaling settings if we have scaled update */
695 if (have_zoom_for_this_update) {
696 blizzard.zoom_on = 1;
697 blizzard.zoom_area_gx1 = gx1_out;
698 blizzard.zoom_area_gx2 = gx2_out;
699 blizzard.zoom_area_gy1 = gy1_out;
700 blizzard.zoom_area_gy2 = gy2_out;
701 }
702
703 set_window_regs(gx1, gy1, gx2, gy2, gx1_out, gy1_out, gx2_out, gy2_out,
704 color_mode, zoom_off, flags);
705 if (zoom_off)
706 blizzard.zoom_on = 0;
707
708 blizzard.extif->set_bits_per_cycle(16);
709 /* set_window_regs has left the register index at the right
710 * place, so no need to set it here.
711 */
712 blizzard.extif->transfer_area(w, h, request_complete, req);
713
714 return REQ_PENDING;
715 }
716
send_frame_handler(struct blizzard_request * req)717 static int send_frame_handler(struct blizzard_request *req)
718 {
719 struct update_param *par = &req->par.update;
720 int plane = par->plane;
721
722 #ifdef VERBOSE
723 dev_dbg(blizzard.fbdev->dev,
724 "send_frame: x %d y %d w %d h %d "
725 "x_out %d y_out %d w_out %d h_out %d "
726 "color_mode %04x flags %04x planes %01x\n",
727 par->x, par->y, par->width, par->height,
728 par->out_x, par->out_y, par->out_width, par->out_height,
729 par->color_mode, par->flags, blizzard.enabled_planes);
730 #endif
731 if (par->flags & OMAPFB_FORMAT_FLAG_DISABLE_OVERLAY)
732 disable_overlay();
733
734 if ((blizzard.enabled_planes & blizzard.vid_nonstd_color) ||
735 (blizzard.enabled_planes & blizzard.vid_scaled))
736 return do_full_screen_update(req);
737
738 return do_partial_update(req, plane, par->x, par->y,
739 par->width, par->height,
740 par->out_x, par->out_y,
741 par->out_width, par->out_height,
742 par->color_mode, par->bpp);
743 }
744
send_frame_complete(void * data)745 static void send_frame_complete(void *data)
746 {
747 }
748
749 #define ADD_PREQ(_x, _y, _w, _h, _x_out, _y_out, _w_out, _h_out) do { \
750 req = alloc_req(); \
751 req->handler = send_frame_handler; \
752 req->complete = send_frame_complete; \
753 req->par.update.plane = plane_idx; \
754 req->par.update.x = _x; \
755 req->par.update.y = _y; \
756 req->par.update.width = _w; \
757 req->par.update.height = _h; \
758 req->par.update.out_x = _x_out; \
759 req->par.update.out_y = _y_out; \
760 req->par.update.out_width = _w_out; \
761 req->par.update.out_height = _h_out; \
762 req->par.update.bpp = bpp; \
763 req->par.update.color_mode = color_mode;\
764 req->par.update.flags = flags; \
765 list_add_tail(&req->entry, req_head); \
766 } while(0)
767
create_req_list(int plane_idx,struct omapfb_update_window * win,struct list_head * req_head)768 static void create_req_list(int plane_idx,
769 struct omapfb_update_window *win,
770 struct list_head *req_head)
771 {
772 struct blizzard_request *req;
773 int x = win->x;
774 int y = win->y;
775 int width = win->width;
776 int height = win->height;
777 int x_out = win->out_x;
778 int y_out = win->out_y;
779 int width_out = win->out_width;
780 int height_out = win->out_height;
781 int color_mode;
782 int bpp;
783 int flags;
784 unsigned int ystart = y;
785 unsigned int yspan = height;
786 unsigned int ystart_out = y_out;
787 unsigned int yspan_out = height_out;
788
789 flags = win->format & ~OMAPFB_FORMAT_MASK;
790 color_mode = win->format & OMAPFB_FORMAT_MASK;
791 switch (color_mode) {
792 case OMAPFB_COLOR_YUV420:
793 /* Embedded window with different color mode */
794 bpp = 12;
795 /* X, Y, height must be aligned at 2, width at 4 pixels */
796 x &= ~1;
797 y &= ~1;
798 height = yspan = height & ~1;
799 width = width & ~3;
800 break;
801 default:
802 /* Same as the plane color mode */
803 bpp = blizzard.plane[plane_idx].bpp;
804 break;
805 }
806 if (width * height * bpp / 8 > blizzard.max_transmit_size) {
807 yspan = blizzard.max_transmit_size / (width * bpp / 8);
808 yspan_out = yspan * height_out / height;
809 ADD_PREQ(x, ystart, width, yspan, x_out, ystart_out,
810 width_out, yspan_out);
811 ystart += yspan;
812 ystart_out += yspan_out;
813 yspan = height - yspan;
814 yspan_out = height_out - yspan_out;
815 flags &= ~OMAPFB_FORMAT_FLAG_TEARSYNC;
816 }
817
818 ADD_PREQ(x, ystart, width, yspan, x_out, ystart_out,
819 width_out, yspan_out);
820 }
821
auto_update_complete(void * data)822 static void auto_update_complete(void *data)
823 {
824 if (!blizzard.stop_auto_update)
825 mod_timer(&blizzard.auto_update_timer,
826 jiffies + BLIZZARD_AUTO_UPDATE_TIME);
827 }
828
blizzard_update_window_auto(unsigned long arg)829 static void blizzard_update_window_auto(unsigned long arg)
830 {
831 LIST_HEAD(req_list);
832 struct blizzard_request *last;
833 struct omapfb_plane_struct *plane;
834
835 plane = blizzard.fbdev->fb_info[0]->par;
836 create_req_list(plane->idx,
837 &blizzard.auto_update_window, &req_list);
838 last = list_entry(req_list.prev, struct blizzard_request, entry);
839
840 last->complete = auto_update_complete;
841 last->complete_data = NULL;
842
843 submit_req_list(&req_list);
844 }
845
blizzard_update_window_async(struct fb_info * fbi,struct omapfb_update_window * win,void (* complete_callback)(void * arg),void * complete_callback_data)846 int blizzard_update_window_async(struct fb_info *fbi,
847 struct omapfb_update_window *win,
848 void (*complete_callback)(void *arg),
849 void *complete_callback_data)
850 {
851 LIST_HEAD(req_list);
852 struct blizzard_request *last;
853 struct omapfb_plane_struct *plane = fbi->par;
854
855 if (unlikely(blizzard.update_mode != OMAPFB_MANUAL_UPDATE))
856 return -EINVAL;
857 if (unlikely(!blizzard.te_connected &&
858 (win->format & OMAPFB_FORMAT_FLAG_TEARSYNC)))
859 return -EINVAL;
860
861 create_req_list(plane->idx, win, &req_list);
862 last = list_entry(req_list.prev, struct blizzard_request, entry);
863
864 last->complete = complete_callback;
865 last->complete_data = (void *)complete_callback_data;
866
867 submit_req_list(&req_list);
868
869 return 0;
870 }
871 EXPORT_SYMBOL(blizzard_update_window_async);
872
update_full_screen(void)873 static int update_full_screen(void)
874 {
875 return blizzard_update_window_async(blizzard.fbdev->fb_info[0],
876 &blizzard.auto_update_window, NULL, NULL);
877
878 }
879
blizzard_setup_plane(int plane,int channel_out,unsigned long offset,int screen_width,int pos_x,int pos_y,int width,int height,int color_mode)880 static int blizzard_setup_plane(int plane, int channel_out,
881 unsigned long offset, int screen_width,
882 int pos_x, int pos_y, int width, int height,
883 int color_mode)
884 {
885 struct plane_info *p;
886
887 #ifdef VERBOSE
888 dev_dbg(blizzard.fbdev->dev,
889 "plane %d ch_out %d offset %#08lx scr_width %d "
890 "pos_x %d pos_y %d width %d height %d color_mode %d\n",
891 plane, channel_out, offset, screen_width,
892 pos_x, pos_y, width, height, color_mode);
893 #endif
894 if ((unsigned)plane > OMAPFB_PLANE_NUM)
895 return -EINVAL;
896 p = &blizzard.plane[plane];
897
898 switch (color_mode) {
899 case OMAPFB_COLOR_YUV422:
900 case OMAPFB_COLOR_YUY422:
901 p->bpp = 16;
902 blizzard.vid_nonstd_color &= ~(1 << plane);
903 break;
904 case OMAPFB_COLOR_YUV420:
905 p->bpp = 12;
906 blizzard.vid_nonstd_color |= 1 << plane;
907 break;
908 case OMAPFB_COLOR_RGB565:
909 p->bpp = 16;
910 blizzard.vid_nonstd_color &= ~(1 << plane);
911 break;
912 default:
913 return -EINVAL;
914 }
915
916 p->offset = offset;
917 p->pos_x = pos_x;
918 p->pos_y = pos_y;
919 p->width = width;
920 p->height = height;
921 p->scr_width = screen_width;
922 if (!p->out_width)
923 p->out_width = width;
924 if (!p->out_height)
925 p->out_height = height;
926
927 p->color_mode = color_mode;
928
929 return 0;
930 }
931
blizzard_set_scale(int plane,int orig_w,int orig_h,int out_w,int out_h)932 static int blizzard_set_scale(int plane, int orig_w, int orig_h,
933 int out_w, int out_h)
934 {
935 struct plane_info *p = &blizzard.plane[plane];
936 int r;
937
938 dev_dbg(blizzard.fbdev->dev,
939 "plane %d orig_w %d orig_h %d out_w %d out_h %d\n",
940 plane, orig_w, orig_h, out_w, out_h);
941 if ((unsigned)plane > OMAPFB_PLANE_NUM)
942 return -ENODEV;
943
944 r = blizzard.int_ctrl->set_scale(plane, orig_w, orig_h, out_w, out_h);
945 if (r < 0)
946 return r;
947
948 p->width = orig_w;
949 p->height = orig_h;
950 p->out_width = out_w;
951 p->out_height = out_h;
952 if (orig_w == out_w && orig_h == out_h)
953 blizzard.vid_scaled &= ~(1 << plane);
954 else
955 blizzard.vid_scaled |= 1 << plane;
956
957 return 0;
958 }
959
blizzard_set_rotate(int angle)960 static int blizzard_set_rotate(int angle)
961 {
962 u32 l;
963
964 l = blizzard_read_reg(BLIZZARD_PANEL_CONFIGURATION);
965 l &= ~0x03;
966
967 switch (angle) {
968 case 0:
969 l = l | 0x00;
970 break;
971 case 90:
972 l = l | 0x03;
973 break;
974 case 180:
975 l = l | 0x02;
976 break;
977 case 270:
978 l = l | 0x01;
979 break;
980 default:
981 return -EINVAL;
982 }
983
984 blizzard_write_reg(BLIZZARD_PANEL_CONFIGURATION, l);
985
986 return 0;
987 }
988
blizzard_enable_plane(int plane,int enable)989 static int blizzard_enable_plane(int plane, int enable)
990 {
991 if (enable)
992 blizzard.enabled_planes |= 1 << plane;
993 else
994 blizzard.enabled_planes &= ~(1 << plane);
995
996 return 0;
997 }
998
sync_handler(struct blizzard_request * req)999 static int sync_handler(struct blizzard_request *req)
1000 {
1001 complete(req->par.sync);
1002 return REQ_COMPLETE;
1003 }
1004
blizzard_sync(void)1005 static void blizzard_sync(void)
1006 {
1007 LIST_HEAD(req_list);
1008 struct blizzard_request *req;
1009 struct completion comp;
1010
1011 req = alloc_req();
1012
1013 req->handler = sync_handler;
1014 req->complete = NULL;
1015 init_completion(&comp);
1016 req->par.sync = ∁
1017
1018 list_add(&req->entry, &req_list);
1019 submit_req_list(&req_list);
1020
1021 wait_for_completion(&comp);
1022 }
1023
1024
blizzard_bind_client(struct omapfb_notifier_block * nb)1025 static void blizzard_bind_client(struct omapfb_notifier_block *nb)
1026 {
1027 if (blizzard.update_mode == OMAPFB_MANUAL_UPDATE) {
1028 omapfb_notify_clients(blizzard.fbdev, OMAPFB_EVENT_READY);
1029 }
1030 }
1031
blizzard_set_update_mode(enum omapfb_update_mode mode)1032 static int blizzard_set_update_mode(enum omapfb_update_mode mode)
1033 {
1034 if (unlikely(mode != OMAPFB_MANUAL_UPDATE &&
1035 mode != OMAPFB_AUTO_UPDATE &&
1036 mode != OMAPFB_UPDATE_DISABLED))
1037 return -EINVAL;
1038
1039 if (mode == blizzard.update_mode)
1040 return 0;
1041
1042 dev_info(blizzard.fbdev->dev, "s1d1374x: setting update mode to %s\n",
1043 mode == OMAPFB_UPDATE_DISABLED ? "disabled" :
1044 (mode == OMAPFB_AUTO_UPDATE ? "auto" : "manual"));
1045
1046 switch (blizzard.update_mode) {
1047 case OMAPFB_MANUAL_UPDATE:
1048 omapfb_notify_clients(blizzard.fbdev, OMAPFB_EVENT_DISABLED);
1049 break;
1050 case OMAPFB_AUTO_UPDATE:
1051 blizzard.stop_auto_update = 1;
1052 del_timer_sync(&blizzard.auto_update_timer);
1053 break;
1054 case OMAPFB_UPDATE_DISABLED:
1055 break;
1056 }
1057
1058 blizzard.update_mode = mode;
1059 blizzard_sync();
1060 blizzard.stop_auto_update = 0;
1061
1062 switch (mode) {
1063 case OMAPFB_MANUAL_UPDATE:
1064 omapfb_notify_clients(blizzard.fbdev, OMAPFB_EVENT_READY);
1065 break;
1066 case OMAPFB_AUTO_UPDATE:
1067 blizzard_update_window_auto(0);
1068 break;
1069 case OMAPFB_UPDATE_DISABLED:
1070 break;
1071 }
1072
1073 return 0;
1074 }
1075
blizzard_get_update_mode(void)1076 static enum omapfb_update_mode blizzard_get_update_mode(void)
1077 {
1078 return blizzard.update_mode;
1079 }
1080
set_extif_timings(const struct extif_timings * t)1081 static inline void set_extif_timings(const struct extif_timings *t)
1082 {
1083 blizzard.extif->set_timings(t);
1084 }
1085
round_to_extif_ticks(unsigned long ps,int div)1086 static inline unsigned long round_to_extif_ticks(unsigned long ps, int div)
1087 {
1088 int bus_tick = blizzard.extif_clk_period * div;
1089 return (ps + bus_tick - 1) / bus_tick * bus_tick;
1090 }
1091
calc_reg_timing(unsigned long sysclk,int div)1092 static int calc_reg_timing(unsigned long sysclk, int div)
1093 {
1094 struct extif_timings *t;
1095 unsigned long systim;
1096
1097 /* CSOnTime 0, WEOnTime 2 ns, REOnTime 2 ns,
1098 * AccessTime 2 ns + 12.2 ns (regs),
1099 * WEOffTime = WEOnTime + 1 ns,
1100 * REOffTime = REOnTime + 12 ns (regs),
1101 * CSOffTime = REOffTime + 1 ns
1102 * ReadCycle = 2ns + 2*SYSCLK (regs),
1103 * WriteCycle = 2*SYSCLK + 2 ns,
1104 * CSPulseWidth = 10 ns */
1105
1106 systim = 1000000000 / (sysclk / 1000);
1107 dev_dbg(blizzard.fbdev->dev,
1108 "Blizzard systim %lu ps extif_clk_period %u div %d\n",
1109 systim, blizzard.extif_clk_period, div);
1110
1111 t = &blizzard.reg_timings;
1112 memset(t, 0, sizeof(*t));
1113
1114 t->clk_div = div;
1115
1116 t->cs_on_time = 0;
1117 t->we_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div);
1118 t->re_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div);
1119 t->access_time = round_to_extif_ticks(t->re_on_time + 12200, div);
1120 t->we_off_time = round_to_extif_ticks(t->we_on_time + 1000, div);
1121 t->re_off_time = round_to_extif_ticks(t->re_on_time + 13000, div);
1122 t->cs_off_time = round_to_extif_ticks(t->re_off_time + 1000, div);
1123 t->we_cycle_time = round_to_extif_ticks(2 * systim + 2000, div);
1124 if (t->we_cycle_time < t->we_off_time)
1125 t->we_cycle_time = t->we_off_time;
1126 t->re_cycle_time = round_to_extif_ticks(2 * systim + 2000, div);
1127 if (t->re_cycle_time < t->re_off_time)
1128 t->re_cycle_time = t->re_off_time;
1129 t->cs_pulse_width = 0;
1130
1131 dev_dbg(blizzard.fbdev->dev, "[reg]cson %d csoff %d reon %d reoff %d\n",
1132 t->cs_on_time, t->cs_off_time, t->re_on_time, t->re_off_time);
1133 dev_dbg(blizzard.fbdev->dev, "[reg]weon %d weoff %d recyc %d wecyc %d\n",
1134 t->we_on_time, t->we_off_time, t->re_cycle_time,
1135 t->we_cycle_time);
1136 dev_dbg(blizzard.fbdev->dev, "[reg]rdaccess %d cspulse %d\n",
1137 t->access_time, t->cs_pulse_width);
1138
1139 return blizzard.extif->convert_timings(t);
1140 }
1141
calc_lut_timing(unsigned long sysclk,int div)1142 static int calc_lut_timing(unsigned long sysclk, int div)
1143 {
1144 struct extif_timings *t;
1145 unsigned long systim;
1146
1147 /* CSOnTime 0, WEOnTime 2 ns, REOnTime 2 ns,
1148 * AccessTime 2 ns + 4 * SYSCLK + 26 (lut),
1149 * WEOffTime = WEOnTime + 1 ns,
1150 * REOffTime = REOnTime + 4*SYSCLK + 26 ns (lut),
1151 * CSOffTime = REOffTime + 1 ns
1152 * ReadCycle = 2ns + 4*SYSCLK + 26 ns (lut),
1153 * WriteCycle = 2*SYSCLK + 2 ns,
1154 * CSPulseWidth = 10 ns */
1155
1156 systim = 1000000000 / (sysclk / 1000);
1157 dev_dbg(blizzard.fbdev->dev,
1158 "Blizzard systim %lu ps extif_clk_period %u div %d\n",
1159 systim, blizzard.extif_clk_period, div);
1160
1161 t = &blizzard.lut_timings;
1162 memset(t, 0, sizeof(*t));
1163
1164 t->clk_div = div;
1165
1166 t->cs_on_time = 0;
1167 t->we_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div);
1168 t->re_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div);
1169 t->access_time = round_to_extif_ticks(t->re_on_time + 4 * systim +
1170 26000, div);
1171 t->we_off_time = round_to_extif_ticks(t->we_on_time + 1000, div);
1172 t->re_off_time = round_to_extif_ticks(t->re_on_time + 4 * systim +
1173 26000, div);
1174 t->cs_off_time = round_to_extif_ticks(t->re_off_time + 1000, div);
1175 t->we_cycle_time = round_to_extif_ticks(2 * systim + 2000, div);
1176 if (t->we_cycle_time < t->we_off_time)
1177 t->we_cycle_time = t->we_off_time;
1178 t->re_cycle_time = round_to_extif_ticks(2000 + 4 * systim + 26000, div);
1179 if (t->re_cycle_time < t->re_off_time)
1180 t->re_cycle_time = t->re_off_time;
1181 t->cs_pulse_width = 0;
1182
1183 dev_dbg(blizzard.fbdev->dev,
1184 "[lut]cson %d csoff %d reon %d reoff %d\n",
1185 t->cs_on_time, t->cs_off_time, t->re_on_time, t->re_off_time);
1186 dev_dbg(blizzard.fbdev->dev,
1187 "[lut]weon %d weoff %d recyc %d wecyc %d\n",
1188 t->we_on_time, t->we_off_time, t->re_cycle_time,
1189 t->we_cycle_time);
1190 dev_dbg(blizzard.fbdev->dev, "[lut]rdaccess %d cspulse %d\n",
1191 t->access_time, t->cs_pulse_width);
1192
1193 return blizzard.extif->convert_timings(t);
1194 }
1195
calc_extif_timings(unsigned long sysclk,int * extif_mem_div)1196 static int calc_extif_timings(unsigned long sysclk, int *extif_mem_div)
1197 {
1198 int max_clk_div;
1199 int div;
1200
1201 blizzard.extif->get_clk_info(&blizzard.extif_clk_period, &max_clk_div);
1202 for (div = 1; div <= max_clk_div; div++) {
1203 if (calc_reg_timing(sysclk, div) == 0)
1204 break;
1205 }
1206 if (div > max_clk_div) {
1207 dev_dbg(blizzard.fbdev->dev, "reg timing failed\n");
1208 goto err;
1209 }
1210 *extif_mem_div = div;
1211
1212 for (div = 1; div <= max_clk_div; div++) {
1213 if (calc_lut_timing(sysclk, div) == 0)
1214 break;
1215 }
1216
1217 if (div > max_clk_div)
1218 goto err;
1219
1220 blizzard.extif_clk_div = div;
1221
1222 return 0;
1223 err:
1224 dev_err(blizzard.fbdev->dev, "can't setup timings\n");
1225 return -1;
1226 }
1227
calc_blizzard_clk_rates(unsigned long ext_clk,unsigned long * sys_clk,unsigned long * pix_clk)1228 static void calc_blizzard_clk_rates(unsigned long ext_clk,
1229 unsigned long *sys_clk, unsigned long *pix_clk)
1230 {
1231 int pix_clk_src;
1232 int sys_div = 0, sys_mul = 0;
1233 int pix_div;
1234
1235 pix_clk_src = blizzard_read_reg(BLIZZARD_CLK_SRC);
1236 pix_div = ((pix_clk_src >> 3) & 0x1f) + 1;
1237 if ((pix_clk_src & (0x3 << 1)) == 0) {
1238 /* Source is the PLL */
1239 sys_div = (blizzard_read_reg(BLIZZARD_PLL_DIV) & 0x3f) + 1;
1240 sys_mul = blizzard_read_reg(BLIZZARD_PLL_CLOCK_SYNTH_0);
1241 sys_mul |= ((blizzard_read_reg(BLIZZARD_PLL_CLOCK_SYNTH_1)
1242 & 0x0f) << 11);
1243 *sys_clk = ext_clk * sys_mul / sys_div;
1244 } else /* else source is ext clk, or oscillator */
1245 *sys_clk = ext_clk;
1246
1247 *pix_clk = *sys_clk / pix_div; /* HZ */
1248 dev_dbg(blizzard.fbdev->dev,
1249 "ext_clk %ld pix_src %d pix_div %d sys_div %d sys_mul %d\n",
1250 ext_clk, pix_clk_src & (0x3 << 1), pix_div, sys_div, sys_mul);
1251 dev_dbg(blizzard.fbdev->dev, "sys_clk %ld pix_clk %ld\n",
1252 *sys_clk, *pix_clk);
1253 }
1254
setup_tearsync(unsigned long pix_clk,int extif_div)1255 static int setup_tearsync(unsigned long pix_clk, int extif_div)
1256 {
1257 int hdisp, vdisp;
1258 int hndp, vndp;
1259 int hsw, vsw;
1260 int hs, vs;
1261 int hs_pol_inv, vs_pol_inv;
1262 int use_hsvs, use_ndp;
1263 u8 b;
1264
1265 hsw = blizzard_read_reg(BLIZZARD_HSW);
1266 vsw = blizzard_read_reg(BLIZZARD_VSW);
1267 hs_pol_inv = !(hsw & 0x80);
1268 vs_pol_inv = !(vsw & 0x80);
1269 hsw = hsw & 0x7f;
1270 vsw = vsw & 0x3f;
1271
1272 hdisp = blizzard_read_reg(BLIZZARD_HDISP) * 8;
1273 vdisp = blizzard_read_reg(BLIZZARD_VDISP0) +
1274 ((blizzard_read_reg(BLIZZARD_VDISP1) & 0x3) << 8);
1275
1276 hndp = blizzard_read_reg(BLIZZARD_HNDP) & 0x3f;
1277 vndp = blizzard_read_reg(BLIZZARD_VNDP);
1278
1279 /* time to transfer one pixel (16bpp) in ps */
1280 blizzard.pix_tx_time = blizzard.reg_timings.we_cycle_time;
1281 if (blizzard.extif->get_max_tx_rate != NULL) {
1282 /* The external interface might have a rate limitation,
1283 * if so, we have to maximize our transfer rate.
1284 */
1285 unsigned long min_tx_time;
1286 unsigned long max_tx_rate = blizzard.extif->get_max_tx_rate();
1287
1288 dev_dbg(blizzard.fbdev->dev, "max_tx_rate %ld HZ\n",
1289 max_tx_rate);
1290 min_tx_time = 1000000000 / (max_tx_rate / 1000); /* ps */
1291 if (blizzard.pix_tx_time < min_tx_time)
1292 blizzard.pix_tx_time = min_tx_time;
1293 }
1294
1295 /* time to update one line in ps */
1296 blizzard.line_upd_time = (hdisp + hndp) * 1000000 / (pix_clk / 1000);
1297 blizzard.line_upd_time *= 1000;
1298 if (hdisp * blizzard.pix_tx_time > blizzard.line_upd_time)
1299 /* transfer speed too low, we might have to use both
1300 * HS and VS */
1301 use_hsvs = 1;
1302 else
1303 /* decent transfer speed, we'll always use only VS */
1304 use_hsvs = 0;
1305
1306 if (use_hsvs && (hs_pol_inv || vs_pol_inv)) {
1307 /* HS or'ed with VS doesn't work, use the active high
1308 * TE signal based on HNDP / VNDP */
1309 use_ndp = 1;
1310 hs_pol_inv = 0;
1311 vs_pol_inv = 0;
1312 hs = hndp;
1313 vs = vndp;
1314 } else {
1315 /* Use HS or'ed with VS as a TE signal if both are needed
1316 * or VNDP if only vsync is needed. */
1317 use_ndp = 0;
1318 hs = hsw;
1319 vs = vsw;
1320 if (!use_hsvs) {
1321 hs_pol_inv = 0;
1322 vs_pol_inv = 0;
1323 }
1324 }
1325
1326 hs = hs * 1000000 / (pix_clk / 1000); /* ps */
1327 hs *= 1000;
1328
1329 vs = vs * (hdisp + hndp) * 1000000 / (pix_clk / 1000); /* ps */
1330 vs *= 1000;
1331
1332 if (vs <= hs)
1333 return -EDOM;
1334 /* set VS to 120% of HS to minimize VS detection time */
1335 vs = hs * 12 / 10;
1336 /* minimize HS too */
1337 if (hs > 10000)
1338 hs = 10000;
1339
1340 b = blizzard_read_reg(BLIZZARD_NDISP_CTRL_STATUS);
1341 b &= ~0x3;
1342 b |= use_hsvs ? 1 : 0;
1343 b |= (use_ndp && use_hsvs) ? 0 : 2;
1344 blizzard_write_reg(BLIZZARD_NDISP_CTRL_STATUS, b);
1345
1346 blizzard.vsync_only = !use_hsvs;
1347
1348 dev_dbg(blizzard.fbdev->dev,
1349 "pix_clk %ld HZ pix_tx_time %ld ps line_upd_time %ld ps\n",
1350 pix_clk, blizzard.pix_tx_time, blizzard.line_upd_time);
1351 dev_dbg(blizzard.fbdev->dev,
1352 "hs %d ps vs %d ps mode %d vsync_only %d\n",
1353 hs, vs, b & 0x3, !use_hsvs);
1354
1355 return blizzard.extif->setup_tearsync(1, hs, vs,
1356 hs_pol_inv, vs_pol_inv,
1357 extif_div);
1358 }
1359
blizzard_get_caps(int plane,struct omapfb_caps * caps)1360 static void blizzard_get_caps(int plane, struct omapfb_caps *caps)
1361 {
1362 blizzard.int_ctrl->get_caps(plane, caps);
1363 caps->ctrl |= OMAPFB_CAPS_MANUAL_UPDATE |
1364 OMAPFB_CAPS_WINDOW_PIXEL_DOUBLE |
1365 OMAPFB_CAPS_WINDOW_SCALE |
1366 OMAPFB_CAPS_WINDOW_OVERLAY |
1367 OMAPFB_CAPS_WINDOW_ROTATE;
1368 if (blizzard.te_connected)
1369 caps->ctrl |= OMAPFB_CAPS_TEARSYNC;
1370 caps->wnd_color |= (1 << OMAPFB_COLOR_RGB565) |
1371 (1 << OMAPFB_COLOR_YUV420);
1372 }
1373
_save_regs(const struct blizzard_reg_list * list,int cnt)1374 static void _save_regs(const struct blizzard_reg_list *list, int cnt)
1375 {
1376 int i;
1377
1378 for (i = 0; i < cnt; i++, list++) {
1379 int reg;
1380 for (reg = list->start; reg <= list->end; reg += 2)
1381 blizzard_reg_cache[reg / 2] = blizzard_read_reg(reg);
1382 }
1383 }
1384
_restore_regs(const struct blizzard_reg_list * list,int cnt)1385 static void _restore_regs(const struct blizzard_reg_list *list, int cnt)
1386 {
1387 int i;
1388
1389 for (i = 0; i < cnt; i++, list++) {
1390 int reg;
1391 for (reg = list->start; reg <= list->end; reg += 2)
1392 blizzard_write_reg(reg, blizzard_reg_cache[reg / 2]);
1393 }
1394 }
1395
blizzard_save_all_regs(void)1396 static void blizzard_save_all_regs(void)
1397 {
1398 _save_regs(blizzard_pll_regs, ARRAY_SIZE(blizzard_pll_regs));
1399 _save_regs(blizzard_gen_regs, ARRAY_SIZE(blizzard_gen_regs));
1400 }
1401
blizzard_restore_pll_regs(void)1402 static void blizzard_restore_pll_regs(void)
1403 {
1404 _restore_regs(blizzard_pll_regs, ARRAY_SIZE(blizzard_pll_regs));
1405 }
1406
blizzard_restore_gen_regs(void)1407 static void blizzard_restore_gen_regs(void)
1408 {
1409 _restore_regs(blizzard_gen_regs, ARRAY_SIZE(blizzard_gen_regs));
1410 }
1411
blizzard_suspend(void)1412 static void blizzard_suspend(void)
1413 {
1414 u32 l;
1415 unsigned long tmo;
1416
1417 if (blizzard.last_color_mode) {
1418 update_full_screen();
1419 blizzard_sync();
1420 }
1421 blizzard.update_mode_before_suspend = blizzard.update_mode;
1422 /* the following will disable clocks as well */
1423 blizzard_set_update_mode(OMAPFB_UPDATE_DISABLED);
1424
1425 blizzard_save_all_regs();
1426
1427 blizzard_stop_sdram();
1428
1429 l = blizzard_read_reg(BLIZZARD_POWER_SAVE);
1430 /* Standby, Sleep. We assume we use an external clock. */
1431 l |= 0x03;
1432 blizzard_write_reg(BLIZZARD_POWER_SAVE, l);
1433
1434 tmo = jiffies + msecs_to_jiffies(100);
1435 while (!(blizzard_read_reg(BLIZZARD_PLL_MODE) & (1 << 1))) {
1436 if (time_after(jiffies, tmo)) {
1437 dev_err(blizzard.fbdev->dev,
1438 "s1d1374x: sleep timeout, stopping PLL manually\n");
1439 l = blizzard_read_reg(BLIZZARD_PLL_MODE);
1440 l &= ~0x03;
1441 /* Disable PLL, counter function */
1442 l |= 0x2;
1443 blizzard_write_reg(BLIZZARD_PLL_MODE, l);
1444 break;
1445 }
1446 msleep(1);
1447 }
1448
1449 if (blizzard.power_down != NULL)
1450 blizzard.power_down(blizzard.fbdev->dev);
1451 }
1452
blizzard_resume(void)1453 static void blizzard_resume(void)
1454 {
1455 u32 l;
1456
1457 if (blizzard.power_up != NULL)
1458 blizzard.power_up(blizzard.fbdev->dev);
1459
1460 l = blizzard_read_reg(BLIZZARD_POWER_SAVE);
1461 /* Standby, Sleep */
1462 l &= ~0x03;
1463 blizzard_write_reg(BLIZZARD_POWER_SAVE, l);
1464
1465 blizzard_restore_pll_regs();
1466 l = blizzard_read_reg(BLIZZARD_PLL_MODE);
1467 l &= ~0x03;
1468 /* Enable PLL, counter function */
1469 l |= 0x1;
1470 blizzard_write_reg(BLIZZARD_PLL_MODE, l);
1471
1472 while (!(blizzard_read_reg(BLIZZARD_PLL_DIV) & (1 << 7)))
1473 msleep(1);
1474
1475 blizzard_restart_sdram();
1476
1477 blizzard_restore_gen_regs();
1478
1479 /* Enable display */
1480 blizzard_write_reg(BLIZZARD_DISPLAY_MODE, 0x01);
1481
1482 /* the following will enable clocks as necessary */
1483 blizzard_set_update_mode(blizzard.update_mode_before_suspend);
1484
1485 /* Force a background update */
1486 blizzard.zoom_on = 1;
1487 update_full_screen();
1488 blizzard_sync();
1489 }
1490
blizzard_init(struct omapfb_device * fbdev,int ext_mode,struct omapfb_mem_desc * req_vram)1491 static int blizzard_init(struct omapfb_device *fbdev, int ext_mode,
1492 struct omapfb_mem_desc *req_vram)
1493 {
1494 int r = 0, i;
1495 u8 rev, conf;
1496 unsigned long ext_clk;
1497 int extif_div;
1498 unsigned long sys_clk, pix_clk;
1499 struct omapfb_platform_data *omapfb_conf;
1500 struct blizzard_platform_data *ctrl_conf;
1501
1502 blizzard.fbdev = fbdev;
1503
1504 BUG_ON(!fbdev->ext_if || !fbdev->int_ctrl);
1505
1506 blizzard.fbdev = fbdev;
1507 blizzard.extif = fbdev->ext_if;
1508 blizzard.int_ctrl = fbdev->int_ctrl;
1509
1510 omapfb_conf = fbdev->dev->platform_data;
1511 ctrl_conf = omapfb_conf->ctrl_platform_data;
1512 if (ctrl_conf == NULL || ctrl_conf->get_clock_rate == NULL) {
1513 dev_err(fbdev->dev, "s1d1374x: missing platform data\n");
1514 r = -ENOENT;
1515 goto err1;
1516 }
1517
1518 blizzard.power_down = ctrl_conf->power_down;
1519 blizzard.power_up = ctrl_conf->power_up;
1520
1521 spin_lock_init(&blizzard.req_lock);
1522
1523 if ((r = blizzard.int_ctrl->init(fbdev, 1, req_vram)) < 0)
1524 goto err1;
1525
1526 if ((r = blizzard.extif->init(fbdev)) < 0)
1527 goto err2;
1528
1529 blizzard_ctrl.set_color_key = blizzard.int_ctrl->set_color_key;
1530 blizzard_ctrl.get_color_key = blizzard.int_ctrl->get_color_key;
1531 blizzard_ctrl.setup_mem = blizzard.int_ctrl->setup_mem;
1532 blizzard_ctrl.mmap = blizzard.int_ctrl->mmap;
1533
1534 ext_clk = ctrl_conf->get_clock_rate(fbdev->dev);
1535 if ((r = calc_extif_timings(ext_clk, &extif_div)) < 0)
1536 goto err3;
1537
1538 set_extif_timings(&blizzard.reg_timings);
1539
1540 if (blizzard.power_up != NULL)
1541 blizzard.power_up(fbdev->dev);
1542
1543 calc_blizzard_clk_rates(ext_clk, &sys_clk, &pix_clk);
1544
1545 if ((r = calc_extif_timings(sys_clk, &extif_div)) < 0)
1546 goto err3;
1547 set_extif_timings(&blizzard.reg_timings);
1548
1549 if (!(blizzard_read_reg(BLIZZARD_PLL_DIV) & 0x80)) {
1550 dev_err(fbdev->dev,
1551 "controller not initialized by the bootloader\n");
1552 r = -ENODEV;
1553 goto err3;
1554 }
1555
1556 if (ctrl_conf->te_connected) {
1557 if ((r = setup_tearsync(pix_clk, extif_div)) < 0)
1558 goto err3;
1559 blizzard.te_connected = 1;
1560 }
1561
1562 rev = blizzard_read_reg(BLIZZARD_REV_CODE);
1563 conf = blizzard_read_reg(BLIZZARD_CONFIG);
1564
1565 switch (rev & 0xfc) {
1566 case 0x9c:
1567 blizzard.version = BLIZZARD_VERSION_S1D13744;
1568 pr_info("omapfb: s1d13744 LCD controller rev %d "
1569 "initialized (CNF pins %x)\n", rev & 0x03, conf & 0x07);
1570 break;
1571 case 0xa4:
1572 blizzard.version = BLIZZARD_VERSION_S1D13745;
1573 pr_info("omapfb: s1d13745 LCD controller rev %d "
1574 "initialized (CNF pins %x)\n", rev & 0x03, conf & 0x07);
1575 break;
1576 default:
1577 dev_err(fbdev->dev, "invalid s1d1374x revision %02x\n",
1578 rev);
1579 r = -ENODEV;
1580 goto err3;
1581 }
1582
1583 blizzard.max_transmit_size = blizzard.extif->max_transmit_size;
1584
1585 blizzard.update_mode = OMAPFB_UPDATE_DISABLED;
1586
1587 blizzard.auto_update_window.x = 0;
1588 blizzard.auto_update_window.y = 0;
1589 blizzard.auto_update_window.width = fbdev->panel->x_res;
1590 blizzard.auto_update_window.height = fbdev->panel->y_res;
1591 blizzard.auto_update_window.out_x = 0;
1592 blizzard.auto_update_window.out_y = 0;
1593 blizzard.auto_update_window.out_width = fbdev->panel->x_res;
1594 blizzard.auto_update_window.out_height = fbdev->panel->y_res;
1595 blizzard.auto_update_window.format = 0;
1596
1597 blizzard.screen_width = fbdev->panel->x_res;
1598 blizzard.screen_height = fbdev->panel->y_res;
1599
1600 init_timer(&blizzard.auto_update_timer);
1601 blizzard.auto_update_timer.function = blizzard_update_window_auto;
1602 blizzard.auto_update_timer.data = 0;
1603
1604 INIT_LIST_HEAD(&blizzard.free_req_list);
1605 INIT_LIST_HEAD(&blizzard.pending_req_list);
1606 for (i = 0; i < ARRAY_SIZE(blizzard.req_pool); i++)
1607 list_add(&blizzard.req_pool[i].entry, &blizzard.free_req_list);
1608 BUG_ON(i <= IRQ_REQ_POOL_SIZE);
1609 sema_init(&blizzard.req_sema, i - IRQ_REQ_POOL_SIZE);
1610
1611 return 0;
1612 err3:
1613 if (blizzard.power_down != NULL)
1614 blizzard.power_down(fbdev->dev);
1615 blizzard.extif->cleanup();
1616 err2:
1617 blizzard.int_ctrl->cleanup();
1618 err1:
1619 return r;
1620 }
1621
blizzard_cleanup(void)1622 static void blizzard_cleanup(void)
1623 {
1624 blizzard_set_update_mode(OMAPFB_UPDATE_DISABLED);
1625 blizzard.extif->cleanup();
1626 blizzard.int_ctrl->cleanup();
1627 if (blizzard.power_down != NULL)
1628 blizzard.power_down(blizzard.fbdev->dev);
1629 }
1630
1631 struct lcd_ctrl blizzard_ctrl = {
1632 .name = "blizzard",
1633 .init = blizzard_init,
1634 .cleanup = blizzard_cleanup,
1635 .bind_client = blizzard_bind_client,
1636 .get_caps = blizzard_get_caps,
1637 .set_update_mode = blizzard_set_update_mode,
1638 .get_update_mode = blizzard_get_update_mode,
1639 .setup_plane = blizzard_setup_plane,
1640 .set_scale = blizzard_set_scale,
1641 .enable_plane = blizzard_enable_plane,
1642 .set_rotate = blizzard_set_rotate,
1643 .update_window = blizzard_update_window_async,
1644 .sync = blizzard_sync,
1645 .suspend = blizzard_suspend,
1646 .resume = blizzard_resume,
1647 };
1648
1649