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x86/xen: resume timer irqs early
[linux/fpc-iii.git] / drivers / video / bf537-lq035.c
bloba82d2578d976e9ad67b862ab66ddef64cb46029e
1 /*
2 * Analog Devices Blackfin(BF537 STAMP) + SHARP TFT LCD.
3 * http://docs.blackfin.uclinux.org/doku.php?id=hw:cards:tft-lcd
4 *
5 * Copyright 2006-2010 Analog Devices Inc.
6 * Licensed under the GPL-2.
7 */
8
9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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/delay.h>
17 #include <linux/fb.h>
18 #include <linux/ioport.h>
19 #include <linux/init.h>
20 #include <linux/types.h>
21 #include <linux/gpio.h>
22 #include <linux/interrupt.h>
23 #include <linux/sched.h>
24 #include <linux/timer.h>
25 #include <linux/device.h>
26 #include <linux/backlight.h>
27 #include <linux/lcd.h>
28 #include <linux/i2c.h>
29 #include <linux/spinlock.h>
30 #include <linux/dma-mapping.h>
31 #include <linux/slab.h>
32 #include <linux/platform_device.h>
33
34 #include <asm/blackfin.h>
35 #include <asm/irq.h>
36 #include <asm/dpmc.h>
37 #include <asm/dma.h>
38 #include <asm/portmux.h>
39
40 #define NO_BL 1
41
42 #define MAX_BRIGHENESS 95
43 #define MIN_BRIGHENESS 5
44 #define NBR_PALETTE 256
45
46 static const unsigned short ppi_pins[] = {
47 P_PPI0_CLK, P_PPI0_D0, P_PPI0_D1, P_PPI0_D2, P_PPI0_D3,
48 P_PPI0_D4, P_PPI0_D5, P_PPI0_D6, P_PPI0_D7,
49 P_PPI0_D8, P_PPI0_D9, P_PPI0_D10, P_PPI0_D11,
50 P_PPI0_D12, P_PPI0_D13, P_PPI0_D14, P_PPI0_D15, 0
51 };
52
53 static unsigned char *fb_buffer; /* RGB Buffer */
54 static unsigned long *dma_desc_table;
55 static int t_conf_done, lq035_open_cnt;
56 static DEFINE_SPINLOCK(bfin_lq035_lock);
57
58 static int landscape;
59 module_param(landscape, int, 0);
60 MODULE_PARM_DESC(landscape,
61 "LANDSCAPE use 320x240 instead of Native 240x320 Resolution");
62
63 static int bgr;
64 module_param(bgr, int, 0);
65 MODULE_PARM_DESC(bgr,
66 "BGR use 16-bit BGR-565 instead of RGB-565");
67
68 static int nocursor = 1;
69 module_param(nocursor, int, 0644);
70 MODULE_PARM_DESC(nocursor, "cursor enable/disable");
71
72 static unsigned long current_brightness; /* backlight */
73
74 /* AD5280 vcomm */
75 static unsigned char vcomm_value = 150;
76 static struct i2c_client *ad5280_client;
77
78 static void set_vcomm(void)
79 {
80 int nr;
81
82 if (!ad5280_client)
83 return;
84
85 nr = i2c_smbus_write_byte_data(ad5280_client, 0x00, vcomm_value);
86 if (nr)
87 pr_err("i2c_smbus_write_byte_data fail: %d\n", nr);
88 }
89
90 static int ad5280_probe(struct i2c_client *client,
91 const struct i2c_device_id *id)
92 {
93 int ret;
94 if (!i2c_check_functionality(client->adapter,
95 I2C_FUNC_SMBUS_BYTE_DATA)) {
96 dev_err(&client->dev, "SMBUS Byte Data not Supported\n");
97 return -EIO;
98 }
99
100 ret = i2c_smbus_write_byte_data(client, 0x00, vcomm_value);
101 if (ret) {
102 dev_err(&client->dev, "write fail: %d\n", ret);
103 return ret;
104 }
105
106 ad5280_client = client;
107
108 return 0;
109 }
110
111 static int ad5280_remove(struct i2c_client *client)
112 {
113 ad5280_client = NULL;
114 return 0;
115 }
116
117 static const struct i2c_device_id ad5280_id[] = {
118 {"bf537-lq035-ad5280", 0},
119 {}
120 };
121
122 MODULE_DEVICE_TABLE(i2c, ad5280_id);
123
124 static struct i2c_driver ad5280_driver = {
125 .driver = {
126 .name = "bf537-lq035-ad5280",
127 },
128 .probe = ad5280_probe,
129 .remove = ad5280_remove,
130 .id_table = ad5280_id,
131 };
132
133 #ifdef CONFIG_PNAV10
134 #define MOD GPIO_PH13
135
136 #define bfin_write_TIMER_LP_CONFIG bfin_write_TIMER0_CONFIG
137 #define bfin_write_TIMER_LP_WIDTH bfin_write_TIMER0_WIDTH
138 #define bfin_write_TIMER_LP_PERIOD bfin_write_TIMER0_PERIOD
139 #define bfin_read_TIMER_LP_COUNTER bfin_read_TIMER0_COUNTER
140 #define TIMDIS_LP TIMDIS0
141 #define TIMEN_LP TIMEN0
142
143 #define bfin_write_TIMER_SPS_CONFIG bfin_write_TIMER1_CONFIG
144 #define bfin_write_TIMER_SPS_WIDTH bfin_write_TIMER1_WIDTH
145 #define bfin_write_TIMER_SPS_PERIOD bfin_write_TIMER1_PERIOD
146 #define TIMDIS_SPS TIMDIS1
147 #define TIMEN_SPS TIMEN1
148
149 #define bfin_write_TIMER_SP_CONFIG bfin_write_TIMER5_CONFIG
150 #define bfin_write_TIMER_SP_WIDTH bfin_write_TIMER5_WIDTH
151 #define bfin_write_TIMER_SP_PERIOD bfin_write_TIMER5_PERIOD
152 #define TIMDIS_SP TIMDIS5
153 #define TIMEN_SP TIMEN5
154
155 #define bfin_write_TIMER_PS_CLS_CONFIG bfin_write_TIMER2_CONFIG
156 #define bfin_write_TIMER_PS_CLS_WIDTH bfin_write_TIMER2_WIDTH
157 #define bfin_write_TIMER_PS_CLS_PERIOD bfin_write_TIMER2_PERIOD
158 #define TIMDIS_PS_CLS TIMDIS2
159 #define TIMEN_PS_CLS TIMEN2
160
161 #define bfin_write_TIMER_REV_CONFIG bfin_write_TIMER3_CONFIG
162 #define bfin_write_TIMER_REV_WIDTH bfin_write_TIMER3_WIDTH
163 #define bfin_write_TIMER_REV_PERIOD bfin_write_TIMER3_PERIOD
164 #define TIMDIS_REV TIMDIS3
165 #define TIMEN_REV TIMEN3
166 #define bfin_read_TIMER_REV_COUNTER bfin_read_TIMER3_COUNTER
167
168 #define FREQ_PPI_CLK (5*1024*1024) /* PPI_CLK 5MHz */
169
170 #define TIMERS {P_TMR0, P_TMR1, P_TMR2, P_TMR3, P_TMR5, 0}
171
172 #else
173
174 #define UD GPIO_PF13 /* Up / Down */
175 #define MOD GPIO_PF10
176 #define LBR GPIO_PF14 /* Left Right */
177
178 #define bfin_write_TIMER_LP_CONFIG bfin_write_TIMER6_CONFIG
179 #define bfin_write_TIMER_LP_WIDTH bfin_write_TIMER6_WIDTH
180 #define bfin_write_TIMER_LP_PERIOD bfin_write_TIMER6_PERIOD
181 #define bfin_read_TIMER_LP_COUNTER bfin_read_TIMER6_COUNTER
182 #define TIMDIS_LP TIMDIS6
183 #define TIMEN_LP TIMEN6
184
185 #define bfin_write_TIMER_SPS_CONFIG bfin_write_TIMER1_CONFIG
186 #define bfin_write_TIMER_SPS_WIDTH bfin_write_TIMER1_WIDTH
187 #define bfin_write_TIMER_SPS_PERIOD bfin_write_TIMER1_PERIOD
188 #define TIMDIS_SPS TIMDIS1
189 #define TIMEN_SPS TIMEN1
190
191 #define bfin_write_TIMER_SP_CONFIG bfin_write_TIMER0_CONFIG
192 #define bfin_write_TIMER_SP_WIDTH bfin_write_TIMER0_WIDTH
193 #define bfin_write_TIMER_SP_PERIOD bfin_write_TIMER0_PERIOD
194 #define TIMDIS_SP TIMDIS0
195 #define TIMEN_SP TIMEN0
196
197 #define bfin_write_TIMER_PS_CLS_CONFIG bfin_write_TIMER7_CONFIG
198 #define bfin_write_TIMER_PS_CLS_WIDTH bfin_write_TIMER7_WIDTH
199 #define bfin_write_TIMER_PS_CLS_PERIOD bfin_write_TIMER7_PERIOD
200 #define TIMDIS_PS_CLS TIMDIS7
201 #define TIMEN_PS_CLS TIMEN7
202
203 #define bfin_write_TIMER_REV_CONFIG bfin_write_TIMER5_CONFIG
204 #define bfin_write_TIMER_REV_WIDTH bfin_write_TIMER5_WIDTH
205 #define bfin_write_TIMER_REV_PERIOD bfin_write_TIMER5_PERIOD
206 #define TIMDIS_REV TIMDIS5
207 #define TIMEN_REV TIMEN5
208 #define bfin_read_TIMER_REV_COUNTER bfin_read_TIMER5_COUNTER
209
210 #define FREQ_PPI_CLK (6*1000*1000) /* PPI_CLK 6MHz */
211 #define TIMERS {P_TMR0, P_TMR1, P_TMR5, P_TMR6, P_TMR7, 0}
212
213 #endif
214
215 #define LCD_X_RES 240 /* Horizontal Resolution */
216 #define LCD_Y_RES 320 /* Vertical Resolution */
217
218 #define LCD_BBP 16 /* Bit Per Pixel */
219
220 /* the LCD and the DMA start counting differently;
221 * since one starts at 0 and the other starts at 1,
222 * we have a difference of 1 between START_LINES
223 * and U_LINES.
224 */
225 #define START_LINES 8 /* lines for field flyback or field blanking signal */
226 #define U_LINES 9 /* number of undisplayed blanking lines */
227
228 #define FRAMES_PER_SEC (60)
229
230 #define DCLKS_PER_FRAME (FREQ_PPI_CLK/FRAMES_PER_SEC)
231 #define DCLKS_PER_LINE (DCLKS_PER_FRAME/(LCD_Y_RES+U_LINES))
232
233 #define PPI_CONFIG_VALUE (PORT_DIR|XFR_TYPE|DLEN_16|POLS)
234 #define PPI_DELAY_VALUE (0)
235 #define TIMER_CONFIG (PWM_OUT|PERIOD_CNT|TIN_SEL|CLK_SEL)
236
237 #define ACTIVE_VIDEO_MEM_OFFSET (LCD_X_RES*START_LINES*(LCD_BBP/8))
238 #define ACTIVE_VIDEO_MEM_SIZE (LCD_Y_RES*LCD_X_RES*(LCD_BBP/8))
239 #define TOTAL_VIDEO_MEM_SIZE ((LCD_Y_RES+U_LINES)*LCD_X_RES*(LCD_BBP/8))
240 #define TOTAL_DMA_DESC_SIZE (2 * sizeof(u32) * (LCD_Y_RES + U_LINES))
241
242 static void start_timers(void) /* CHECK with HW */
243 {
244 unsigned long flags;
245
246 local_irq_save(flags);
247
248 bfin_write_TIMER_ENABLE(TIMEN_REV);
249 SSYNC();
250
251 while (bfin_read_TIMER_REV_COUNTER() <= 11)
252 continue;
253 bfin_write_TIMER_ENABLE(TIMEN_LP);
254 SSYNC();
255
256 while (bfin_read_TIMER_LP_COUNTER() < 3)
257 continue;
258 bfin_write_TIMER_ENABLE(TIMEN_SP|TIMEN_SPS|TIMEN_PS_CLS);
259 SSYNC();
260 t_conf_done = 1;
261 local_irq_restore(flags);
262 }
263
264 static void config_timers(void)
265 {
266 /* Stop timers */
267 bfin_write_TIMER_DISABLE(TIMDIS_SP|TIMDIS_SPS|TIMDIS_REV|
268 TIMDIS_LP|TIMDIS_PS_CLS);
269 SSYNC();
270
271 /* LP, timer 6 */
272 bfin_write_TIMER_LP_CONFIG(TIMER_CONFIG|PULSE_HI);
273 bfin_write_TIMER_LP_WIDTH(1);
274
275 bfin_write_TIMER_LP_PERIOD(DCLKS_PER_LINE);
276 SSYNC();
277
278 /* SPS, timer 1 */
279 bfin_write_TIMER_SPS_CONFIG(TIMER_CONFIG|PULSE_HI);
280 bfin_write_TIMER_SPS_WIDTH(DCLKS_PER_LINE*2);
281 bfin_write_TIMER_SPS_PERIOD((DCLKS_PER_LINE * (LCD_Y_RES+U_LINES)));
282 SSYNC();
283
284 /* SP, timer 0 */
285 bfin_write_TIMER_SP_CONFIG(TIMER_CONFIG|PULSE_HI);
286 bfin_write_TIMER_SP_WIDTH(1);
287 bfin_write_TIMER_SP_PERIOD(DCLKS_PER_LINE);
288 SSYNC();
289
290 /* PS & CLS, timer 7 */
291 bfin_write_TIMER_PS_CLS_CONFIG(TIMER_CONFIG);
292 bfin_write_TIMER_PS_CLS_WIDTH(LCD_X_RES + START_LINES);
293 bfin_write_TIMER_PS_CLS_PERIOD(DCLKS_PER_LINE);
294
295 SSYNC();
296
297 #ifdef NO_BL
298 /* REV, timer 5 */
299 bfin_write_TIMER_REV_CONFIG(TIMER_CONFIG|PULSE_HI);
300
301 bfin_write_TIMER_REV_WIDTH(DCLKS_PER_LINE);
302 bfin_write_TIMER_REV_PERIOD(DCLKS_PER_LINE*2);
303
304 SSYNC();
305 #endif
306 }
307
308 static void config_ppi(void)
309 {
310 bfin_write_PPI_DELAY(PPI_DELAY_VALUE);
311 bfin_write_PPI_COUNT(LCD_X_RES-1);
312 /* 0x10 -> PORT_CFG -> 2 or 3 frame syncs */
313 bfin_write_PPI_CONTROL((PPI_CONFIG_VALUE|0x10) & (~POLS));
314 }
315
316 static int config_dma(void)
317 {
318 u32 i;
319
320 if (landscape) {
321
322 for (i = 0; i < U_LINES; ++i) {
323 /* blanking lines point to first line of fb_buffer */
324 dma_desc_table[2*i] = (unsigned long)&dma_desc_table[2*i+2];
325 dma_desc_table[2*i+1] = (unsigned long)fb_buffer;
326 }
327
328 for (i = U_LINES; i < U_LINES + LCD_Y_RES; ++i) {
329 /* visible lines */
330 dma_desc_table[2*i] = (unsigned long)&dma_desc_table[2*i+2];
331 dma_desc_table[2*i+1] = (unsigned long)fb_buffer +
332 (LCD_Y_RES+U_LINES-1-i)*2;
333 }
334
335 /* last descriptor points to first */
336 dma_desc_table[2*(LCD_Y_RES+U_LINES-1)] = (unsigned long)&dma_desc_table[0];
337
338 set_dma_x_count(CH_PPI, LCD_X_RES);
339 set_dma_x_modify(CH_PPI, LCD_Y_RES * (LCD_BBP / 8));
340 set_dma_y_count(CH_PPI, 0);
341 set_dma_y_modify(CH_PPI, 0);
342 set_dma_next_desc_addr(CH_PPI, (void *)dma_desc_table[0]);
343 set_dma_config(CH_PPI, DMAFLOW_LARGE | NDSIZE_4 | WDSIZE_16);
344
345 } else {
346
347 set_dma_config(CH_PPI, set_bfin_dma_config(DIR_READ,
348 DMA_FLOW_AUTO,
349 INTR_DISABLE,
350 DIMENSION_2D,
351 DATA_SIZE_16,
352 DMA_NOSYNC_KEEP_DMA_BUF));
353 set_dma_x_count(CH_PPI, LCD_X_RES);
354 set_dma_x_modify(CH_PPI, LCD_BBP / 8);
355 set_dma_y_count(CH_PPI, LCD_Y_RES+U_LINES);
356 set_dma_y_modify(CH_PPI, LCD_BBP / 8);
357 set_dma_start_addr(CH_PPI, (unsigned long) fb_buffer);
358 }
359
360 return 0;
361 }
362
363 static int request_ports(void)
364 {
365 u16 tmr_req[] = TIMERS;
366
367 /*
368 UD: PF13
369 MOD: PF10
370 LBR: PF14
371 PPI_CLK: PF15
372 */
373
374 if (peripheral_request_list(ppi_pins, KBUILD_MODNAME)) {
375 pr_err("requesting PPI peripheral failed\n");
376 return -EBUSY;
377 }
378
379 if (peripheral_request_list(tmr_req, KBUILD_MODNAME)) {
380 peripheral_free_list(ppi_pins);
381 pr_err("requesting timer peripheral failed\n");
382 return -EBUSY;
383 }
384
385 #if (defined(UD) && defined(LBR))
386 if (gpio_request_one(UD, GPIOF_OUT_INIT_LOW, KBUILD_MODNAME)) {
387 pr_err("requesting GPIO %d failed\n", UD);
388 return -EBUSY;
389 }
390
391 if (gpio_request_one(LBR, GPIOF_OUT_INIT_HIGH, KBUILD_MODNAME)) {
392 pr_err("requesting GPIO %d failed\n", LBR);
393 gpio_free(UD);
394 return -EBUSY;
395 }
396 #endif
397
398 if (gpio_request_one(MOD, GPIOF_OUT_INIT_HIGH, KBUILD_MODNAME)) {
399 pr_err("requesting GPIO %d failed\n", MOD);
400 #if (defined(UD) && defined(LBR))
401 gpio_free(LBR);
402 gpio_free(UD);
403 #endif
404 return -EBUSY;
405 }
406
407 SSYNC();
408 return 0;
409 }
410
411 static void free_ports(void)
412 {
413 u16 tmr_req[] = TIMERS;
414
415 peripheral_free_list(ppi_pins);
416 peripheral_free_list(tmr_req);
417
418 #if defined(UD) && defined(LBR)
419 gpio_free(LBR);
420 gpio_free(UD);
421 #endif
422 gpio_free(MOD);
423 }
424
425 static struct fb_info bfin_lq035_fb;
426
427 static struct fb_var_screeninfo bfin_lq035_fb_defined = {
428 .bits_per_pixel = LCD_BBP,
429 .activate = FB_ACTIVATE_TEST,
430 .xres = LCD_X_RES, /*default portrait mode RGB*/
431 .yres = LCD_Y_RES,
432 .xres_virtual = LCD_X_RES,
433 .yres_virtual = LCD_Y_RES,
434 .height = -1,
435 .width = -1,
436 .left_margin = 0,
437 .right_margin = 0,
438 .upper_margin = 0,
439 .lower_margin = 0,
440 .red = {11, 5, 0},
441 .green = {5, 6, 0},
442 .blue = {0, 5, 0},
443 .transp = {0, 0, 0},
444 };
445
446 static struct fb_fix_screeninfo bfin_lq035_fb_fix = {
447 .id = KBUILD_MODNAME,
448 .smem_len = ACTIVE_VIDEO_MEM_SIZE,
449 .type = FB_TYPE_PACKED_PIXELS,
450 .visual = FB_VISUAL_TRUECOLOR,
451 .xpanstep = 0,
452 .ypanstep = 0,
453 .line_length = LCD_X_RES*(LCD_BBP/8),
454 .accel = FB_ACCEL_NONE,
455 };
456
457
458 static int bfin_lq035_fb_open(struct fb_info *info, int user)
459 {
460 unsigned long flags;
461
462 spin_lock_irqsave(&bfin_lq035_lock, flags);
463 lq035_open_cnt++;
464 spin_unlock_irqrestore(&bfin_lq035_lock, flags);
465
466 if (lq035_open_cnt <= 1) {
467 bfin_write_PPI_CONTROL(0);
468 SSYNC();
469
470 set_vcomm();
471 config_dma();
472 config_ppi();
473
474 /* start dma */
475 enable_dma(CH_PPI);
476 SSYNC();
477 bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
478 SSYNC();
479
480 if (!t_conf_done) {
481 config_timers();
482 start_timers();
483 }
484 /* gpio_set_value(MOD,1); */
485 }
486
487 return 0;
488 }
489
490 static int bfin_lq035_fb_release(struct fb_info *info, int user)
491 {
492 unsigned long flags;
493
494 spin_lock_irqsave(&bfin_lq035_lock, flags);
495 lq035_open_cnt--;
496 spin_unlock_irqrestore(&bfin_lq035_lock, flags);
497
498
499 if (lq035_open_cnt <= 0) {
500
501 bfin_write_PPI_CONTROL(0);
502 SSYNC();
503
504 disable_dma(CH_PPI);
505 }
506
507 return 0;
508 }
509
510
511 static int bfin_lq035_fb_check_var(struct fb_var_screeninfo *var,
512 struct fb_info *info)
513 {
514 switch (var->bits_per_pixel) {
515 case 16:/* DIRECTCOLOUR, 64k */
516 var->red.offset = info->var.red.offset;
517 var->green.offset = info->var.green.offset;
518 var->blue.offset = info->var.blue.offset;
519 var->red.length = info->var.red.length;
520 var->green.length = info->var.green.length;
521 var->blue.length = info->var.blue.length;
522 var->transp.offset = 0;
523 var->transp.length = 0;
524 var->transp.msb_right = 0;
525 var->red.msb_right = 0;
526 var->green.msb_right = 0;
527 var->blue.msb_right = 0;
528 break;
529 default:
530 pr_debug("%s: depth not supported: %u BPP\n", __func__,
531 var->bits_per_pixel);
532 return -EINVAL;
533 }
534
535 if (info->var.xres != var->xres ||
536 info->var.yres != var->yres ||
537 info->var.xres_virtual != var->xres_virtual ||
538 info->var.yres_virtual != var->yres_virtual) {
539 pr_debug("%s: Resolution not supported: X%u x Y%u\n",
540 __func__, var->xres, var->yres);
541 return -EINVAL;
542 }
543
544 /*
545 * Memory limit
546 */
547
548 if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
549 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
550 __func__, var->yres_virtual);
551 return -ENOMEM;
552 }
553
554 return 0;
555 }
556
557 /* fb_rotate
558 * Rotate the display of this angle. This doesn't seems to be used by the core,
559 * but as our hardware supports it, so why not implementing it...
560 */
561 static void bfin_lq035_fb_rotate(struct fb_info *fbi, int angle)
562 {
563 pr_debug("%s: %p %d", __func__, fbi, angle);
564 #if (defined(UD) && defined(LBR))
565 switch (angle) {
566
567 case 180:
568 gpio_set_value(LBR, 0);
569 gpio_set_value(UD, 1);
570 break;
571 default:
572 gpio_set_value(LBR, 1);
573 gpio_set_value(UD, 0);
574 break;
575 }
576 #endif
577 }
578
579 static int bfin_lq035_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
580 {
581 if (nocursor)
582 return 0;
583 else
584 return -EINVAL; /* just to force soft_cursor() call */
585 }
586
587 static int bfin_lq035_fb_setcolreg(u_int regno, u_int red, u_int green,
588 u_int blue, u_int transp,
589 struct fb_info *info)
590 {
591 if (regno >= NBR_PALETTE)
592 return -EINVAL;
593
594 if (info->var.grayscale)
595 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
596 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
597
598 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
599
600 u32 value;
601 /* Place color in the pseudopalette */
602 if (regno > 16)
603 return -EINVAL;
604
605 red >>= (16 - info->var.red.length);
606 green >>= (16 - info->var.green.length);
607 blue >>= (16 - info->var.blue.length);
608
609 value = (red << info->var.red.offset) |
610 (green << info->var.green.offset)|
611 (blue << info->var.blue.offset);
612 value &= 0xFFFF;
613
614 ((u32 *) (info->pseudo_palette))[regno] = value;
615
616 }
617
618 return 0;
619 }
620
621 static struct fb_ops bfin_lq035_fb_ops = {
622 .owner = THIS_MODULE,
623 .fb_open = bfin_lq035_fb_open,
624 .fb_release = bfin_lq035_fb_release,
625 .fb_check_var = bfin_lq035_fb_check_var,
626 .fb_rotate = bfin_lq035_fb_rotate,
627 .fb_fillrect = cfb_fillrect,
628 .fb_copyarea = cfb_copyarea,
629 .fb_imageblit = cfb_imageblit,
630 .fb_cursor = bfin_lq035_fb_cursor,
631 .fb_setcolreg = bfin_lq035_fb_setcolreg,
632 };
633
634 static int bl_get_brightness(struct backlight_device *bd)
635 {
636 return current_brightness;
637 }
638
639 static const struct backlight_ops bfin_lq035fb_bl_ops = {
640 .get_brightness = bl_get_brightness,
641 };
642
643 static struct backlight_device *bl_dev;
644
645 static int bfin_lcd_get_power(struct lcd_device *dev)
646 {
647 return 0;
648 }
649
650 static int bfin_lcd_set_power(struct lcd_device *dev, int power)
651 {
652 return 0;
653 }
654
655 static int bfin_lcd_get_contrast(struct lcd_device *dev)
656 {
657 return (int)vcomm_value;
658 }
659
660 static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
661 {
662 if (contrast > 255)
663 contrast = 255;
664 if (contrast < 0)
665 contrast = 0;
666
667 vcomm_value = (unsigned char)contrast;
668 set_vcomm();
669 return 0;
670 }
671
672 static int bfin_lcd_check_fb(struct lcd_device *lcd, struct fb_info *fi)
673 {
674 if (!fi || (fi == &bfin_lq035_fb))
675 return 1;
676 return 0;
677 }
678
679 static struct lcd_ops bfin_lcd_ops = {
680 .get_power = bfin_lcd_get_power,
681 .set_power = bfin_lcd_set_power,
682 .get_contrast = bfin_lcd_get_contrast,
683 .set_contrast = bfin_lcd_set_contrast,
684 .check_fb = bfin_lcd_check_fb,
685 };
686
687 static struct lcd_device *lcd_dev;
688
689 static int bfin_lq035_probe(struct platform_device *pdev)
690 {
691 struct backlight_properties props;
692 dma_addr_t dma_handle;
693 int ret;
694
695 if (request_dma(CH_PPI, KBUILD_MODNAME)) {
696 pr_err("couldn't request PPI DMA\n");
697 return -EFAULT;
698 }
699
700 if (request_ports()) {
701 pr_err("couldn't request gpio port\n");
702 ret = -EFAULT;
703 goto out_ports;
704 }
705
706 fb_buffer = dma_alloc_coherent(NULL, TOTAL_VIDEO_MEM_SIZE,
707 &dma_handle, GFP_KERNEL);
708 if (fb_buffer == NULL) {
709 pr_err("couldn't allocate dma buffer\n");
710 ret = -ENOMEM;
711 goto out_dma_coherent;
712 }
713
714 if (L1_DATA_A_LENGTH)
715 dma_desc_table = l1_data_sram_zalloc(TOTAL_DMA_DESC_SIZE);
716 else
717 dma_desc_table = dma_alloc_coherent(NULL, TOTAL_DMA_DESC_SIZE,
718 &dma_handle, 0);
719
720 if (dma_desc_table == NULL) {
721 pr_err("couldn't allocate dma descriptor\n");
722 ret = -ENOMEM;
723 goto out_table;
724 }
725
726 bfin_lq035_fb.screen_base = (void *)fb_buffer;
727 bfin_lq035_fb_fix.smem_start = (int)fb_buffer;
728 if (landscape) {
729 bfin_lq035_fb_defined.xres = LCD_Y_RES;
730 bfin_lq035_fb_defined.yres = LCD_X_RES;
731 bfin_lq035_fb_defined.xres_virtual = LCD_Y_RES;
732 bfin_lq035_fb_defined.yres_virtual = LCD_X_RES;
733
734 bfin_lq035_fb_fix.line_length = LCD_Y_RES*(LCD_BBP/8);
735 } else {
736 bfin_lq035_fb.screen_base += ACTIVE_VIDEO_MEM_OFFSET;
737 bfin_lq035_fb_fix.smem_start += ACTIVE_VIDEO_MEM_OFFSET;
738 }
739
740 bfin_lq035_fb_defined.green.msb_right = 0;
741 bfin_lq035_fb_defined.red.msb_right = 0;
742 bfin_lq035_fb_defined.blue.msb_right = 0;
743 bfin_lq035_fb_defined.green.offset = 5;
744 bfin_lq035_fb_defined.green.length = 6;
745 bfin_lq035_fb_defined.red.length = 5;
746 bfin_lq035_fb_defined.blue.length = 5;
747
748 if (bgr) {
749 bfin_lq035_fb_defined.red.offset = 0;
750 bfin_lq035_fb_defined.blue.offset = 11;
751 } else {
752 bfin_lq035_fb_defined.red.offset = 11;
753 bfin_lq035_fb_defined.blue.offset = 0;
754 }
755
756 bfin_lq035_fb.fbops = &bfin_lq035_fb_ops;
757 bfin_lq035_fb.var = bfin_lq035_fb_defined;
758
759 bfin_lq035_fb.fix = bfin_lq035_fb_fix;
760 bfin_lq035_fb.flags = FBINFO_DEFAULT;
761
762
763 bfin_lq035_fb.pseudo_palette = devm_kzalloc(&pdev->dev,
764 sizeof(u32) * 16,
765 GFP_KERNEL);
766 if (bfin_lq035_fb.pseudo_palette == NULL) {
767 pr_err("failed to allocate pseudo_palette\n");
768 ret = -ENOMEM;
769 goto out_table;
770 }
771
772 if (fb_alloc_cmap(&bfin_lq035_fb.cmap, NBR_PALETTE, 0) < 0) {
773 pr_err("failed to allocate colormap (%d entries)\n",
774 NBR_PALETTE);
775 ret = -EFAULT;
776 goto out_table;
777 }
778
779 if (register_framebuffer(&bfin_lq035_fb) < 0) {
780 pr_err("unable to register framebuffer\n");
781 ret = -EINVAL;
782 goto out_reg;
783 }
784
785 i2c_add_driver(&ad5280_driver);
786
787 memset(&props, 0, sizeof(props));
788 props.type = BACKLIGHT_RAW;
789 props.max_brightness = MAX_BRIGHENESS;
790 bl_dev = backlight_device_register("bf537-bl", NULL, NULL,
791 &bfin_lq035fb_bl_ops, &props);
792
793 lcd_dev = lcd_device_register(KBUILD_MODNAME, &pdev->dev, NULL,
794 &bfin_lcd_ops);
795 if (IS_ERR(lcd_dev)) {
796 pr_err("unable to register lcd\n");
797 ret = PTR_ERR(lcd_dev);
798 goto out_lcd;
799 }
800 lcd_dev->props.max_contrast = 255,
801
802 pr_info("initialized");
803
804 return 0;
805 out_lcd:
806 unregister_framebuffer(&bfin_lq035_fb);
807 out_reg:
808 fb_dealloc_cmap(&bfin_lq035_fb.cmap);
809 out_table:
810 dma_free_coherent(NULL, TOTAL_VIDEO_MEM_SIZE, fb_buffer, 0);
811 fb_buffer = NULL;
812 out_dma_coherent:
813 free_ports();
814 out_ports:
815 free_dma(CH_PPI);
816 return ret;
817 }
818
819 static int bfin_lq035_remove(struct platform_device *pdev)
820 {
821 if (fb_buffer != NULL)
822 dma_free_coherent(NULL, TOTAL_VIDEO_MEM_SIZE, fb_buffer, 0);
823
824 if (L1_DATA_A_LENGTH)
825 l1_data_sram_free(dma_desc_table);
826 else
827 dma_free_coherent(NULL, TOTAL_DMA_DESC_SIZE, NULL, 0);
828
829 bfin_write_TIMER_DISABLE(TIMEN_SP|TIMEN_SPS|TIMEN_PS_CLS|
830 TIMEN_LP|TIMEN_REV);
831 t_conf_done = 0;
832
833 free_dma(CH_PPI);
834
835
836 fb_dealloc_cmap(&bfin_lq035_fb.cmap);
837
838
839 lcd_device_unregister(lcd_dev);
840 backlight_device_unregister(bl_dev);
841
842 unregister_framebuffer(&bfin_lq035_fb);
843 i2c_del_driver(&ad5280_driver);
844
845 free_ports();
846
847 pr_info("unregistered LCD driver\n");
848
849 return 0;
850 }
851
852 #ifdef CONFIG_PM
853 static int bfin_lq035_suspend(struct platform_device *pdev, pm_message_t state)
854 {
855 if (lq035_open_cnt > 0) {
856 bfin_write_PPI_CONTROL(0);
857 SSYNC();
858 disable_dma(CH_PPI);
859 }
860
861 return 0;
862 }
863
864 static int bfin_lq035_resume(struct platform_device *pdev)
865 {
866 if (lq035_open_cnt > 0) {
867 bfin_write_PPI_CONTROL(0);
868 SSYNC();
869
870 config_dma();
871 config_ppi();
872
873 enable_dma(CH_PPI);
874 bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
875 SSYNC();
876
877 config_timers();
878 start_timers();
879 } else {
880 t_conf_done = 0;
881 }
882
883 return 0;
884 }
885 #else
886 # define bfin_lq035_suspend NULL
887 # define bfin_lq035_resume NULL
888 #endif
889
890 static struct platform_driver bfin_lq035_driver = {
891 .probe = bfin_lq035_probe,
892 .remove = bfin_lq035_remove,
893 .suspend = bfin_lq035_suspend,
894 .resume = bfin_lq035_resume,
895 .driver = {
896 .name = KBUILD_MODNAME,
897 .owner = THIS_MODULE,
898 },
899 };
900
901 static int __init bfin_lq035_driver_init(void)
902 {
903 request_module("i2c-bfin-twi");
904 return platform_driver_register(&bfin_lq035_driver);
905 }
906 module_init(bfin_lq035_driver_init);
907
908 static void __exit bfin_lq035_driver_cleanup(void)
909 {
910 platform_driver_unregister(&bfin_lq035_driver);
911 }
912 module_exit(bfin_lq035_driver_cleanup);
913
914 MODULE_DESCRIPTION("SHARP LQ035Q7DB03 TFT LCD Driver");
915 MODULE_LICENSE("GPL");
Linux with added FPC-III support