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
set_vcomm(void)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
ad5280_probe(struct i2c_client * client,const struct i2c_device_id * id)90 static int __devinit 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
ad5280_remove(struct i2c_client * client)111 static int __devexit 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 = __devexit_p(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
start_timers(void)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
config_timers(void)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
config_ppi(void)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
config_dma(void)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
request_ports(void)363 static int __devinit 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(UD, KBUILD_MODNAME)) {
387 pr_err("requesting GPIO %d failed\n", UD);
388 return -EBUSY;
389 }
390
391 if (gpio_request(LBR, KBUILD_MODNAME)) {
392 pr_err("requesting GPIO %d failed\n", LBR);
393 gpio_free(UD);
394 return -EBUSY;
395 }
396
397 gpio_direction_output(UD, 0);
398 gpio_direction_output(LBR, 1);
399
400 #endif
401
402 if (gpio_request(MOD, KBUILD_MODNAME)) {
403 pr_err("requesting GPIO %d failed\n", MOD);
404 #if (defined(UD) && defined(LBR))
405 gpio_free(LBR);
406 gpio_free(UD);
407 #endif
408 return -EBUSY;
409 }
410
411 gpio_direction_output(MOD, 1);
412
413 SSYNC();
414 return 0;
415 }
416
free_ports(void)417 static void free_ports(void)
418 {
419 u16 tmr_req[] = TIMERS;
420
421 peripheral_free_list(ppi_pins);
422 peripheral_free_list(tmr_req);
423
424 #if defined(UD) && defined(LBR)
425 gpio_free(LBR);
426 gpio_free(UD);
427 #endif
428 gpio_free(MOD);
429 }
430
431 static struct fb_info bfin_lq035_fb;
432
433 static struct fb_var_screeninfo bfin_lq035_fb_defined = {
434 .bits_per_pixel = LCD_BBP,
435 .activate = FB_ACTIVATE_TEST,
436 .xres = LCD_X_RES, /*default portrait mode RGB*/
437 .yres = LCD_Y_RES,
438 .xres_virtual = LCD_X_RES,
439 .yres_virtual = LCD_Y_RES,
440 .height = -1,
441 .width = -1,
442 .left_margin = 0,
443 .right_margin = 0,
444 .upper_margin = 0,
445 .lower_margin = 0,
446 .red = {11, 5, 0},
447 .green = {5, 6, 0},
448 .blue = {0, 5, 0},
449 .transp = {0, 0, 0},
450 };
451
452 static struct fb_fix_screeninfo bfin_lq035_fb_fix __devinitdata = {
453 .id = KBUILD_MODNAME,
454 .smem_len = ACTIVE_VIDEO_MEM_SIZE,
455 .type = FB_TYPE_PACKED_PIXELS,
456 .visual = FB_VISUAL_TRUECOLOR,
457 .xpanstep = 0,
458 .ypanstep = 0,
459 .line_length = LCD_X_RES*(LCD_BBP/8),
460 .accel = FB_ACCEL_NONE,
461 };
462
463
bfin_lq035_fb_open(struct fb_info * info,int user)464 static int bfin_lq035_fb_open(struct fb_info *info, int user)
465 {
466 unsigned long flags;
467
468 spin_lock_irqsave(&bfin_lq035_lock, flags);
469 lq035_open_cnt++;
470 spin_unlock_irqrestore(&bfin_lq035_lock, flags);
471
472 if (lq035_open_cnt <= 1) {
473 bfin_write_PPI_CONTROL(0);
474 SSYNC();
475
476 set_vcomm();
477 config_dma();
478 config_ppi();
479
480 /* start dma */
481 enable_dma(CH_PPI);
482 SSYNC();
483 bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
484 SSYNC();
485
486 if (!t_conf_done) {
487 config_timers();
488 start_timers();
489 }
490 /* gpio_set_value(MOD,1); */
491 }
492
493 return 0;
494 }
495
bfin_lq035_fb_release(struct fb_info * info,int user)496 static int bfin_lq035_fb_release(struct fb_info *info, int user)
497 {
498 unsigned long flags;
499
500 spin_lock_irqsave(&bfin_lq035_lock, flags);
501 lq035_open_cnt--;
502 spin_unlock_irqrestore(&bfin_lq035_lock, flags);
503
504
505 if (lq035_open_cnt <= 0) {
506
507 bfin_write_PPI_CONTROL(0);
508 SSYNC();
509
510 disable_dma(CH_PPI);
511 }
512
513 return 0;
514 }
515
516
bfin_lq035_fb_check_var(struct fb_var_screeninfo * var,struct fb_info * info)517 static int bfin_lq035_fb_check_var(struct fb_var_screeninfo *var,
518 struct fb_info *info)
519 {
520 switch (var->bits_per_pixel) {
521 case 16:/* DIRECTCOLOUR, 64k */
522 var->red.offset = info->var.red.offset;
523 var->green.offset = info->var.green.offset;
524 var->blue.offset = info->var.blue.offset;
525 var->red.length = info->var.red.length;
526 var->green.length = info->var.green.length;
527 var->blue.length = info->var.blue.length;
528 var->transp.offset = 0;
529 var->transp.length = 0;
530 var->transp.msb_right = 0;
531 var->red.msb_right = 0;
532 var->green.msb_right = 0;
533 var->blue.msb_right = 0;
534 break;
535 default:
536 pr_debug("%s: depth not supported: %u BPP\n", __func__,
537 var->bits_per_pixel);
538 return -EINVAL;
539 }
540
541 if (info->var.xres != var->xres ||
542 info->var.yres != var->yres ||
543 info->var.xres_virtual != var->xres_virtual ||
544 info->var.yres_virtual != var->yres_virtual) {
545 pr_debug("%s: Resolution not supported: X%u x Y%u\n",
546 __func__, var->xres, var->yres);
547 return -EINVAL;
548 }
549
550 /*
551 * Memory limit
552 */
553
554 if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
555 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
556 __func__, var->yres_virtual);
557 return -ENOMEM;
558 }
559
560 return 0;
561 }
562
563 /* fb_rotate
564 * Rotate the display of this angle. This doesn't seems to be used by the core,
565 * but as our hardware supports it, so why not implementing it...
566 */
bfin_lq035_fb_rotate(struct fb_info * fbi,int angle)567 static void bfin_lq035_fb_rotate(struct fb_info *fbi, int angle)
568 {
569 pr_debug("%s: %p %d", __func__, fbi, angle);
570 #if (defined(UD) && defined(LBR))
571 switch (angle) {
572
573 case 180:
574 gpio_set_value(LBR, 0);
575 gpio_set_value(UD, 1);
576 break;
577 default:
578 gpio_set_value(LBR, 1);
579 gpio_set_value(UD, 0);
580 break;
581 }
582 #endif
583 }
584
bfin_lq035_fb_cursor(struct fb_info * info,struct fb_cursor * cursor)585 static int bfin_lq035_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
586 {
587 if (nocursor)
588 return 0;
589 else
590 return -EINVAL; /* just to force soft_cursor() call */
591 }
592
bfin_lq035_fb_setcolreg(u_int regno,u_int red,u_int green,u_int blue,u_int transp,struct fb_info * info)593 static int bfin_lq035_fb_setcolreg(u_int regno, u_int red, u_int green,
594 u_int blue, u_int transp,
595 struct fb_info *info)
596 {
597 if (regno >= NBR_PALETTE)
598 return -EINVAL;
599
600 if (info->var.grayscale)
601 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
602 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
603
604 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
605
606 u32 value;
607 /* Place color in the pseudopalette */
608 if (regno > 16)
609 return -EINVAL;
610
611 red >>= (16 - info->var.red.length);
612 green >>= (16 - info->var.green.length);
613 blue >>= (16 - info->var.blue.length);
614
615 value = (red << info->var.red.offset) |
616 (green << info->var.green.offset)|
617 (blue << info->var.blue.offset);
618 value &= 0xFFFF;
619
620 ((u32 *) (info->pseudo_palette))[regno] = value;
621
622 }
623
624 return 0;
625 }
626
627 static struct fb_ops bfin_lq035_fb_ops = {
628 .owner = THIS_MODULE,
629 .fb_open = bfin_lq035_fb_open,
630 .fb_release = bfin_lq035_fb_release,
631 .fb_check_var = bfin_lq035_fb_check_var,
632 .fb_rotate = bfin_lq035_fb_rotate,
633 .fb_fillrect = cfb_fillrect,
634 .fb_copyarea = cfb_copyarea,
635 .fb_imageblit = cfb_imageblit,
636 .fb_cursor = bfin_lq035_fb_cursor,
637 .fb_setcolreg = bfin_lq035_fb_setcolreg,
638 };
639
bl_get_brightness(struct backlight_device * bd)640 static int bl_get_brightness(struct backlight_device *bd)
641 {
642 return current_brightness;
643 }
644
645 static const struct backlight_ops bfin_lq035fb_bl_ops = {
646 .get_brightness = bl_get_brightness,
647 };
648
649 static struct backlight_device *bl_dev;
650
bfin_lcd_get_power(struct lcd_device * dev)651 static int bfin_lcd_get_power(struct lcd_device *dev)
652 {
653 return 0;
654 }
655
bfin_lcd_set_power(struct lcd_device * dev,int power)656 static int bfin_lcd_set_power(struct lcd_device *dev, int power)
657 {
658 return 0;
659 }
660
bfin_lcd_get_contrast(struct lcd_device * dev)661 static int bfin_lcd_get_contrast(struct lcd_device *dev)
662 {
663 return (int)vcomm_value;
664 }
665
bfin_lcd_set_contrast(struct lcd_device * dev,int contrast)666 static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
667 {
668 if (contrast > 255)
669 contrast = 255;
670 if (contrast < 0)
671 contrast = 0;
672
673 vcomm_value = (unsigned char)contrast;
674 set_vcomm();
675 return 0;
676 }
677
bfin_lcd_check_fb(struct lcd_device * lcd,struct fb_info * fi)678 static int bfin_lcd_check_fb(struct lcd_device *lcd, struct fb_info *fi)
679 {
680 if (!fi || (fi == &bfin_lq035_fb))
681 return 1;
682 return 0;
683 }
684
685 static struct lcd_ops bfin_lcd_ops = {
686 .get_power = bfin_lcd_get_power,
687 .set_power = bfin_lcd_set_power,
688 .get_contrast = bfin_lcd_get_contrast,
689 .set_contrast = bfin_lcd_set_contrast,
690 .check_fb = bfin_lcd_check_fb,
691 };
692
693 static struct lcd_device *lcd_dev;
694
bfin_lq035_probe(struct platform_device * pdev)695 static int __devinit bfin_lq035_probe(struct platform_device *pdev)
696 {
697 struct backlight_properties props;
698 dma_addr_t dma_handle;
699 int ret;
700
701 if (request_dma(CH_PPI, KBUILD_MODNAME)) {
702 pr_err("couldn't request PPI DMA\n");
703 return -EFAULT;
704 }
705
706 if (request_ports()) {
707 pr_err("couldn't request gpio port\n");
708 ret = -EFAULT;
709 goto out_ports;
710 }
711
712 fb_buffer = dma_alloc_coherent(NULL, TOTAL_VIDEO_MEM_SIZE,
713 &dma_handle, GFP_KERNEL);
714 if (fb_buffer == NULL) {
715 pr_err("couldn't allocate dma buffer\n");
716 ret = -ENOMEM;
717 goto out_dma_coherent;
718 }
719
720 if (L1_DATA_A_LENGTH)
721 dma_desc_table = l1_data_sram_zalloc(TOTAL_DMA_DESC_SIZE);
722 else
723 dma_desc_table = dma_alloc_coherent(NULL, TOTAL_DMA_DESC_SIZE,
724 &dma_handle, 0);
725
726 if (dma_desc_table == NULL) {
727 pr_err("couldn't allocate dma descriptor\n");
728 ret = -ENOMEM;
729 goto out_table;
730 }
731
732 bfin_lq035_fb.screen_base = (void *)fb_buffer;
733 bfin_lq035_fb_fix.smem_start = (int)fb_buffer;
734 if (landscape) {
735 bfin_lq035_fb_defined.xres = LCD_Y_RES;
736 bfin_lq035_fb_defined.yres = LCD_X_RES;
737 bfin_lq035_fb_defined.xres_virtual = LCD_Y_RES;
738 bfin_lq035_fb_defined.yres_virtual = LCD_X_RES;
739
740 bfin_lq035_fb_fix.line_length = LCD_Y_RES*(LCD_BBP/8);
741 } else {
742 bfin_lq035_fb.screen_base += ACTIVE_VIDEO_MEM_OFFSET;
743 bfin_lq035_fb_fix.smem_start += ACTIVE_VIDEO_MEM_OFFSET;
744 }
745
746 bfin_lq035_fb_defined.green.msb_right = 0;
747 bfin_lq035_fb_defined.red.msb_right = 0;
748 bfin_lq035_fb_defined.blue.msb_right = 0;
749 bfin_lq035_fb_defined.green.offset = 5;
750 bfin_lq035_fb_defined.green.length = 6;
751 bfin_lq035_fb_defined.red.length = 5;
752 bfin_lq035_fb_defined.blue.length = 5;
753
754 if (bgr) {
755 bfin_lq035_fb_defined.red.offset = 0;
756 bfin_lq035_fb_defined.blue.offset = 11;
757 } else {
758 bfin_lq035_fb_defined.red.offset = 11;
759 bfin_lq035_fb_defined.blue.offset = 0;
760 }
761
762 bfin_lq035_fb.fbops = &bfin_lq035_fb_ops;
763 bfin_lq035_fb.var = bfin_lq035_fb_defined;
764
765 bfin_lq035_fb.fix = bfin_lq035_fb_fix;
766 bfin_lq035_fb.flags = FBINFO_DEFAULT;
767
768
769 bfin_lq035_fb.pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL);
770 if (bfin_lq035_fb.pseudo_palette == NULL) {
771 pr_err("failed to allocate pseudo_palette\n");
772 ret = -ENOMEM;
773 goto out_palette;
774 }
775
776 if (fb_alloc_cmap(&bfin_lq035_fb.cmap, NBR_PALETTE, 0) < 0) {
777 pr_err("failed to allocate colormap (%d entries)\n",
778 NBR_PALETTE);
779 ret = -EFAULT;
780 goto out_cmap;
781 }
782
783 if (register_framebuffer(&bfin_lq035_fb) < 0) {
784 pr_err("unable to register framebuffer\n");
785 ret = -EINVAL;
786 goto out_reg;
787 }
788
789 i2c_add_driver(&ad5280_driver);
790
791 memset(&props, 0, sizeof(props));
792 props.type = BACKLIGHT_RAW;
793 props.max_brightness = MAX_BRIGHENESS;
794 bl_dev = backlight_device_register("bf537-bl", NULL, NULL,
795 &bfin_lq035fb_bl_ops, &props);
796
797 lcd_dev = lcd_device_register(KBUILD_MODNAME, &pdev->dev, NULL,
798 &bfin_lcd_ops);
799 if (IS_ERR(lcd_dev)) {
800 pr_err("unable to register lcd\n");
801 ret = PTR_ERR(lcd_dev);
802 goto out_lcd;
803 }
804 lcd_dev->props.max_contrast = 255,
805
806 pr_info("initialized");
807
808 return 0;
809 out_lcd:
810 unregister_framebuffer(&bfin_lq035_fb);
811 out_reg:
812 fb_dealloc_cmap(&bfin_lq035_fb.cmap);
813 out_cmap:
814 kfree(bfin_lq035_fb.pseudo_palette);
815 out_palette:
816 out_table:
817 dma_free_coherent(NULL, TOTAL_VIDEO_MEM_SIZE, fb_buffer, 0);
818 fb_buffer = NULL;
819 out_dma_coherent:
820 free_ports();
821 out_ports:
822 free_dma(CH_PPI);
823 return ret;
824 }
825
bfin_lq035_remove(struct platform_device * pdev)826 static int __devexit bfin_lq035_remove(struct platform_device *pdev)
827 {
828 if (fb_buffer != NULL)
829 dma_free_coherent(NULL, TOTAL_VIDEO_MEM_SIZE, fb_buffer, 0);
830
831 if (L1_DATA_A_LENGTH)
832 l1_data_sram_free(dma_desc_table);
833 else
834 dma_free_coherent(NULL, TOTAL_DMA_DESC_SIZE, NULL, 0);
835
836 bfin_write_TIMER_DISABLE(TIMEN_SP|TIMEN_SPS|TIMEN_PS_CLS|
837 TIMEN_LP|TIMEN_REV);
838 t_conf_done = 0;
839
840 free_dma(CH_PPI);
841
842
843 kfree(bfin_lq035_fb.pseudo_palette);
844 fb_dealloc_cmap(&bfin_lq035_fb.cmap);
845
846
847 lcd_device_unregister(lcd_dev);
848 backlight_device_unregister(bl_dev);
849
850 unregister_framebuffer(&bfin_lq035_fb);
851 i2c_del_driver(&ad5280_driver);
852
853 free_ports();
854
855 pr_info("unregistered LCD driver\n");
856
857 return 0;
858 }
859
860 #ifdef CONFIG_PM
bfin_lq035_suspend(struct platform_device * pdev,pm_message_t state)861 static int bfin_lq035_suspend(struct platform_device *pdev, pm_message_t state)
862 {
863 if (lq035_open_cnt > 0) {
864 bfin_write_PPI_CONTROL(0);
865 SSYNC();
866 disable_dma(CH_PPI);
867 }
868
869 return 0;
870 }
871
bfin_lq035_resume(struct platform_device * pdev)872 static int bfin_lq035_resume(struct platform_device *pdev)
873 {
874 if (lq035_open_cnt > 0) {
875 bfin_write_PPI_CONTROL(0);
876 SSYNC();
877
878 config_dma();
879 config_ppi();
880
881 enable_dma(CH_PPI);
882 bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
883 SSYNC();
884
885 config_timers();
886 start_timers();
887 } else {
888 t_conf_done = 0;
889 }
890
891 return 0;
892 }
893 #else
894 # define bfin_lq035_suspend NULL
895 # define bfin_lq035_resume NULL
896 #endif
897
898 static struct platform_driver bfin_lq035_driver = {
899 .probe = bfin_lq035_probe,
900 .remove = __devexit_p(bfin_lq035_remove),
901 .suspend = bfin_lq035_suspend,
902 .resume = bfin_lq035_resume,
903 .driver = {
904 .name = KBUILD_MODNAME,
905 .owner = THIS_MODULE,
906 },
907 };
908
bfin_lq035_driver_init(void)909 static int __init bfin_lq035_driver_init(void)
910 {
911 request_module("i2c-bfin-twi");
912 return platform_driver_register(&bfin_lq035_driver);
913 }
914 module_init(bfin_lq035_driver_init);
915
bfin_lq035_driver_cleanup(void)916 static void __exit bfin_lq035_driver_cleanup(void)
917 {
918 platform_driver_unregister(&bfin_lq035_driver);
919 }
920 module_exit(bfin_lq035_driver_cleanup);
921
922 MODULE_DESCRIPTION("SHARP LQ035Q7DB03 TFT LCD Driver");
923 MODULE_LICENSE("GPL");
924