?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
block: move down direct IO plugging
[linux/fpc-iii.git] / drivers / video / bfin-lq035q1-fb.c
blob353c02fe8a952816af0f5c0d668d80e81f31d204
1 /*
2 * Blackfin LCD Framebuffer driver SHARP LQ035Q1DH02
3 *
4 * Copyright 2008-2009 Analog Devices Inc.
5 * Licensed under the GPL-2 or later.
6 */
7
8 #define DRIVER_NAME "bfin-lq035q1"
9 #define pr_fmt(fmt) DRIVER_NAME ": " 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/fb.h>
16 #include <linux/gpio.h>
17 #include <linux/slab.h>
18 #include <linux/init.h>
19 #include <linux/types.h>
20 #include <linux/interrupt.h>
21 #include <linux/device.h>
22 #include <linux/backlight.h>
23 #include <linux/lcd.h>
24 #include <linux/dma-mapping.h>
25 #include <linux/platform_device.h>
26 #include <linux/spi/spi.h>
27
28 #include <asm/blackfin.h>
29 #include <asm/irq.h>
30 #include <asm/dma.h>
31 #include <asm/portmux.h>
32 #include <asm/gptimers.h>
33
34 #include <asm/bfin-lq035q1.h>
35
36 #if defined(BF533_FAMILY) || defined(BF538_FAMILY)
37 #define TIMER_HSYNC_id TIMER1_id
38 #define TIMER_HSYNCbit TIMER1bit
39 #define TIMER_HSYNC_STATUS_TRUN TIMER_STATUS_TRUN1
40 #define TIMER_HSYNC_STATUS_TIMIL TIMER_STATUS_TIMIL1
41 #define TIMER_HSYNC_STATUS_TOVF TIMER_STATUS_TOVF1
42
43 #define TIMER_VSYNC_id TIMER2_id
44 #define TIMER_VSYNCbit TIMER2bit
45 #define TIMER_VSYNC_STATUS_TRUN TIMER_STATUS_TRUN2
46 #define TIMER_VSYNC_STATUS_TIMIL TIMER_STATUS_TIMIL2
47 #define TIMER_VSYNC_STATUS_TOVF TIMER_STATUS_TOVF2
48 #else
49 #define TIMER_HSYNC_id TIMER0_id
50 #define TIMER_HSYNCbit TIMER0bit
51 #define TIMER_HSYNC_STATUS_TRUN TIMER_STATUS_TRUN0
52 #define TIMER_HSYNC_STATUS_TIMIL TIMER_STATUS_TIMIL0
53 #define TIMER_HSYNC_STATUS_TOVF TIMER_STATUS_TOVF0
54
55 #define TIMER_VSYNC_id TIMER1_id
56 #define TIMER_VSYNCbit TIMER1bit
57 #define TIMER_VSYNC_STATUS_TRUN TIMER_STATUS_TRUN1
58 #define TIMER_VSYNC_STATUS_TIMIL TIMER_STATUS_TIMIL1
59 #define TIMER_VSYNC_STATUS_TOVF TIMER_STATUS_TOVF1
60 #endif
61
62 #define LCD_X_RES 320 /* Horizontal Resolution */
63 #define LCD_Y_RES 240 /* Vertical Resolution */
64 #define DMA_BUS_SIZE 16
65 #define U_LINE 4 /* Blanking Lines */
66
67
68 /* Interface 16/18-bit TFT over an 8-bit wide PPI using a small Programmable Logic Device (CPLD)
69 * http://blackfin.uclinux.org/gf/project/stamp/frs/?action=FrsReleaseBrowse&frs_package_id=165
70 */
71
72
73 #define BFIN_LCD_NBR_PALETTE_ENTRIES 256
74
75 #define PPI_TX_MODE 0x2
76 #define PPI_XFER_TYPE_11 0xC
77 #define PPI_PORT_CFG_01 0x10
78 #define PPI_POLS_1 0x8000
79
80 #define LQ035_INDEX 0x74
81 #define LQ035_DATA 0x76
82
83 #define LQ035_DRIVER_OUTPUT_CTL 0x1
84 #define LQ035_SHUT_CTL 0x11
85
86 #define LQ035_DRIVER_OUTPUT_MASK (LQ035_LR | LQ035_TB | LQ035_BGR | LQ035_REV)
87 #define LQ035_DRIVER_OUTPUT_DEFAULT (0x2AEF & ~LQ035_DRIVER_OUTPUT_MASK)
88
89 #define LQ035_SHUT (1 << 0) /* Shutdown */
90 #define LQ035_ON (0 << 0) /* Shutdown */
91
92 struct bfin_lq035q1fb_info {
93 struct fb_info *fb;
94 struct device *dev;
95 struct spi_driver spidrv;
96 struct bfin_lq035q1fb_disp_info *disp_info;
97 unsigned char *fb_buffer; /* RGB Buffer */
98 dma_addr_t dma_handle;
99 int lq035_open_cnt;
100 int irq;
101 spinlock_t lock; /* lock */
102 u32 pseudo_pal[16];
103
104 u32 lcd_bpp;
105 u32 h_actpix;
106 u32 h_period;
107 u32 h_pulse;
108 u32 h_start;
109 u32 v_lines;
110 u32 v_pulse;
111 u32 v_period;
112 };
113
114 static int nocursor;
115 module_param(nocursor, int, 0644);
116 MODULE_PARM_DESC(nocursor, "cursor enable/disable");
117
118 struct spi_control {
119 unsigned short mode;
120 };
121
122 static int lq035q1_control(struct spi_device *spi, unsigned char reg, unsigned short value)
123 {
124 int ret;
125 u8 regs[3] = { LQ035_INDEX, 0, 0 };
126 u8 dat[3] = { LQ035_DATA, 0, 0 };
127
128 if (!spi)
129 return -ENODEV;
130
131 regs[2] = reg;
132 dat[1] = value >> 8;
133 dat[2] = value & 0xFF;
134
135 ret = spi_write(spi, regs, ARRAY_SIZE(regs));
136 ret |= spi_write(spi, dat, ARRAY_SIZE(dat));
137 return ret;
138 }
139
140 static int __devinit lq035q1_spidev_probe(struct spi_device *spi)
141 {
142 int ret;
143 struct spi_control *ctl;
144 struct bfin_lq035q1fb_info *info = container_of(spi->dev.driver,
145 struct bfin_lq035q1fb_info,
146 spidrv.driver);
147
148 ctl = kzalloc(sizeof(*ctl), GFP_KERNEL);
149
150 if (!ctl)
151 return -ENOMEM;
152
153 ctl->mode = (info->disp_info->mode &
154 LQ035_DRIVER_OUTPUT_MASK) | LQ035_DRIVER_OUTPUT_DEFAULT;
155
156 ret = lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_ON);
157 ret |= lq035q1_control(spi, LQ035_DRIVER_OUTPUT_CTL, ctl->mode);
158 if (ret) {
159 kfree(ctl);
160 return ret;
161 }
162
163 spi_set_drvdata(spi, ctl);
164
165 return 0;
166 }
167
168 static int lq035q1_spidev_remove(struct spi_device *spi)
169 {
170 return lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_SHUT);
171 }
172
173 #ifdef CONFIG_PM
174 static int lq035q1_spidev_suspend(struct spi_device *spi, pm_message_t state)
175 {
176 return lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_SHUT);
177 }
178
179 static int lq035q1_spidev_resume(struct spi_device *spi)
180 {
181 int ret;
182 struct spi_control *ctl = spi_get_drvdata(spi);
183
184 ret = lq035q1_control(spi, LQ035_DRIVER_OUTPUT_CTL, ctl->mode);
185 if (ret)
186 return ret;
187
188 return lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_ON);
189 }
190 #else
191 # define lq035q1_spidev_suspend NULL
192 # define lq035q1_spidev_resume NULL
193 #endif
194
195 /* Power down all displays on reboot, poweroff or halt */
196 static void lq035q1_spidev_shutdown(struct spi_device *spi)
197 {
198 lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_SHUT);
199 }
200
201 static int lq035q1_backlight(struct bfin_lq035q1fb_info *info, unsigned arg)
202 {
203 if (info->disp_info->use_bl)
204 gpio_set_value(info->disp_info->gpio_bl, arg);
205
206 return 0;
207 }
208
209 static int bfin_lq035q1_calc_timing(struct bfin_lq035q1fb_info *fbi)
210 {
211 unsigned long clocks_per_pix, cpld_pipeline_delay_cor;
212
213 /*
214 * Interface 16/18-bit TFT over an 8-bit wide PPI using a small
215 * Programmable Logic Device (CPLD)
216 * http://blackfin.uclinux.org/gf/project/stamp/frs/?action=FrsReleaseBrowse&frs_package_id=165
217 */
218
219 switch (fbi->disp_info->ppi_mode) {
220 case USE_RGB565_16_BIT_PPI:
221 fbi->lcd_bpp = 16;
222 clocks_per_pix = 1;
223 cpld_pipeline_delay_cor = 0;
224 break;
225 case USE_RGB565_8_BIT_PPI:
226 fbi->lcd_bpp = 16;
227 clocks_per_pix = 2;
228 cpld_pipeline_delay_cor = 3;
229 break;
230 case USE_RGB888_8_BIT_PPI:
231 fbi->lcd_bpp = 24;
232 clocks_per_pix = 3;
233 cpld_pipeline_delay_cor = 5;
234 break;
235 default:
236 return -EINVAL;
237 }
238
239 /*
240 * HS and VS timing parameters (all in number of PPI clk ticks)
241 */
242
243 fbi->h_actpix = (LCD_X_RES * clocks_per_pix); /* active horizontal pixel */
244 fbi->h_period = (336 * clocks_per_pix); /* HS period */
245 fbi->h_pulse = (2 * clocks_per_pix); /* HS pulse width */
246 fbi->h_start = (7 * clocks_per_pix + cpld_pipeline_delay_cor); /* first valid pixel */
247
248 fbi->v_lines = (LCD_Y_RES + U_LINE); /* total vertical lines */
249 fbi->v_pulse = (2 * clocks_per_pix); /* VS pulse width (1-5 H_PERIODs) */
250 fbi->v_period = (fbi->h_period * fbi->v_lines); /* VS period */
251
252 return 0;
253 }
254
255 static void bfin_lq035q1_config_ppi(struct bfin_lq035q1fb_info *fbi)
256 {
257 unsigned ppi_pmode;
258
259 if (fbi->disp_info->ppi_mode == USE_RGB565_16_BIT_PPI)
260 ppi_pmode = DLEN_16;
261 else
262 ppi_pmode = (DLEN_8 | PACK_EN);
263
264 bfin_write_PPI_DELAY(fbi->h_start);
265 bfin_write_PPI_COUNT(fbi->h_actpix - 1);
266 bfin_write_PPI_FRAME(fbi->v_lines);
267
268 bfin_write_PPI_CONTROL(PPI_TX_MODE | /* output mode , PORT_DIR */
269 PPI_XFER_TYPE_11 | /* sync mode XFR_TYPE */
270 PPI_PORT_CFG_01 | /* two frame sync PORT_CFG */
271 ppi_pmode | /* 8/16 bit data length / PACK_EN? */
272 PPI_POLS_1); /* faling edge syncs POLS */
273 }
274
275 static inline void bfin_lq035q1_disable_ppi(void)
276 {
277 bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() & ~PORT_EN);
278 }
279
280 static inline void bfin_lq035q1_enable_ppi(void)
281 {
282 bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
283 }
284
285 static void bfin_lq035q1_start_timers(void)
286 {
287 enable_gptimers(TIMER_VSYNCbit | TIMER_HSYNCbit);
288 }
289
290 static void bfin_lq035q1_stop_timers(void)
291 {
292 disable_gptimers(TIMER_HSYNCbit | TIMER_VSYNCbit);
293
294 set_gptimer_status(0, TIMER_HSYNC_STATUS_TRUN | TIMER_VSYNC_STATUS_TRUN |
295 TIMER_HSYNC_STATUS_TIMIL | TIMER_VSYNC_STATUS_TIMIL |
296 TIMER_HSYNC_STATUS_TOVF | TIMER_VSYNC_STATUS_TOVF);
297
298 }
299
300 static void bfin_lq035q1_init_timers(struct bfin_lq035q1fb_info *fbi)
301 {
302
303 bfin_lq035q1_stop_timers();
304
305 set_gptimer_period(TIMER_HSYNC_id, fbi->h_period);
306 set_gptimer_pwidth(TIMER_HSYNC_id, fbi->h_pulse);
307 set_gptimer_config(TIMER_HSYNC_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
308 TIMER_TIN_SEL | TIMER_CLK_SEL|
309 TIMER_EMU_RUN);
310
311 set_gptimer_period(TIMER_VSYNC_id, fbi->v_period);
312 set_gptimer_pwidth(TIMER_VSYNC_id, fbi->v_pulse);
313 set_gptimer_config(TIMER_VSYNC_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
314 TIMER_TIN_SEL | TIMER_CLK_SEL |
315 TIMER_EMU_RUN);
316
317 }
318
319 static void bfin_lq035q1_config_dma(struct bfin_lq035q1fb_info *fbi)
320 {
321
322
323 set_dma_config(CH_PPI,
324 set_bfin_dma_config(DIR_READ, DMA_FLOW_AUTO,
325 INTR_DISABLE, DIMENSION_2D,
326 DATA_SIZE_16,
327 DMA_NOSYNC_KEEP_DMA_BUF));
328 set_dma_x_count(CH_PPI, (LCD_X_RES * fbi->lcd_bpp) / DMA_BUS_SIZE);
329 set_dma_x_modify(CH_PPI, DMA_BUS_SIZE / 8);
330 set_dma_y_count(CH_PPI, fbi->v_lines);
331
332 set_dma_y_modify(CH_PPI, DMA_BUS_SIZE / 8);
333 set_dma_start_addr(CH_PPI, (unsigned long)fbi->fb_buffer);
334
335 }
336
337 static const u16 ppi0_req_16[] = {P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2,
338 P_PPI0_D0, P_PPI0_D1, P_PPI0_D2,
339 P_PPI0_D3, P_PPI0_D4, P_PPI0_D5,
340 P_PPI0_D6, P_PPI0_D7, P_PPI0_D8,
341 P_PPI0_D9, P_PPI0_D10, P_PPI0_D11,
342 P_PPI0_D12, P_PPI0_D13, P_PPI0_D14,
343 P_PPI0_D15, 0};
344
345 static const u16 ppi0_req_8[] = {P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2,
346 P_PPI0_D0, P_PPI0_D1, P_PPI0_D2,
347 P_PPI0_D3, P_PPI0_D4, P_PPI0_D5,
348 P_PPI0_D6, P_PPI0_D7, 0};
349
350 static inline void bfin_lq035q1_free_ports(unsigned ppi16)
351 {
352 if (ppi16)
353 peripheral_free_list(ppi0_req_16);
354 else
355 peripheral_free_list(ppi0_req_8);
356
357 if (ANOMALY_05000400)
358 gpio_free(P_IDENT(P_PPI0_FS3));
359 }
360
361 static int __devinit bfin_lq035q1_request_ports(struct platform_device *pdev,
362 unsigned ppi16)
363 {
364 int ret;
365 /* ANOMALY_05000400 - PPI Does Not Start Properly In Specific Mode:
366 * Drive PPI_FS3 Low
367 */
368 if (ANOMALY_05000400) {
369 int ret = gpio_request_one(P_IDENT(P_PPI0_FS3),
370 GPIOF_OUT_INIT_LOW, "PPI_FS3");
371 if (ret)
372 return ret;
373 }
374
375 if (ppi16)
376 ret = peripheral_request_list(ppi0_req_16, DRIVER_NAME);
377 else
378 ret = peripheral_request_list(ppi0_req_8, DRIVER_NAME);
379
380 if (ret) {
381 dev_err(&pdev->dev, "requesting peripherals failed\n");
382 return -EFAULT;
383 }
384
385 return 0;
386 }
387
388 static int bfin_lq035q1_fb_open(struct fb_info *info, int user)
389 {
390 struct bfin_lq035q1fb_info *fbi = info->par;
391
392 spin_lock(&fbi->lock);
393 fbi->lq035_open_cnt++;
394
395 if (fbi->lq035_open_cnt <= 1) {
396
397 bfin_lq035q1_disable_ppi();
398 SSYNC();
399
400 bfin_lq035q1_config_dma(fbi);
401 bfin_lq035q1_config_ppi(fbi);
402 bfin_lq035q1_init_timers(fbi);
403
404 /* start dma */
405 enable_dma(CH_PPI);
406 bfin_lq035q1_enable_ppi();
407 bfin_lq035q1_start_timers();
408 lq035q1_backlight(fbi, 1);
409 }
410
411 spin_unlock(&fbi->lock);
412
413 return 0;
414 }
415
416 static int bfin_lq035q1_fb_release(struct fb_info *info, int user)
417 {
418 struct bfin_lq035q1fb_info *fbi = info->par;
419
420 spin_lock(&fbi->lock);
421
422 fbi->lq035_open_cnt--;
423
424 if (fbi->lq035_open_cnt <= 0) {
425 lq035q1_backlight(fbi, 0);
426 bfin_lq035q1_disable_ppi();
427 SSYNC();
428 disable_dma(CH_PPI);
429 bfin_lq035q1_stop_timers();
430 }
431
432 spin_unlock(&fbi->lock);
433
434 return 0;
435 }
436
437 static int bfin_lq035q1_fb_check_var(struct fb_var_screeninfo *var,
438 struct fb_info *info)
439 {
440 struct bfin_lq035q1fb_info *fbi = info->par;
441
442 if (var->bits_per_pixel == fbi->lcd_bpp) {
443 var->red.offset = info->var.red.offset;
444 var->green.offset = info->var.green.offset;
445 var->blue.offset = info->var.blue.offset;
446 var->red.length = info->var.red.length;
447 var->green.length = info->var.green.length;
448 var->blue.length = info->var.blue.length;
449 var->transp.offset = 0;
450 var->transp.length = 0;
451 var->transp.msb_right = 0;
452 var->red.msb_right = 0;
453 var->green.msb_right = 0;
454 var->blue.msb_right = 0;
455 } else {
456 pr_debug("%s: depth not supported: %u BPP\n", __func__,
457 var->bits_per_pixel);
458 return -EINVAL;
459 }
460
461 if (info->var.xres != var->xres || info->var.yres != var->yres ||
462 info->var.xres_virtual != var->xres_virtual ||
463 info->var.yres_virtual != var->yres_virtual) {
464 pr_debug("%s: Resolution not supported: X%u x Y%u \n",
465 __func__, var->xres, var->yres);
466 return -EINVAL;
467 }
468
469 /*
470 * Memory limit
471 */
472
473 if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
474 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
475 __func__, var->yres_virtual);
476 return -ENOMEM;
477 }
478
479
480 return 0;
481 }
482
483 int bfin_lq035q1_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
484 {
485 if (nocursor)
486 return 0;
487 else
488 return -EINVAL; /* just to force soft_cursor() call */
489 }
490
491 static int bfin_lq035q1_fb_setcolreg(u_int regno, u_int red, u_int green,
492 u_int blue, u_int transp,
493 struct fb_info *info)
494 {
495 if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
496 return -EINVAL;
497
498 if (info->var.grayscale) {
499 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
500 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
501 }
502
503 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
504
505 u32 value;
506 /* Place color in the pseudopalette */
507 if (regno > 16)
508 return -EINVAL;
509
510 red >>= (16 - info->var.red.length);
511 green >>= (16 - info->var.green.length);
512 blue >>= (16 - info->var.blue.length);
513
514 value = (red << info->var.red.offset) |
515 (green << info->var.green.offset) |
516 (blue << info->var.blue.offset);
517 value &= 0xFFFFFF;
518
519 ((u32 *) (info->pseudo_palette))[regno] = value;
520
521 }
522
523 return 0;
524 }
525
526 static struct fb_ops bfin_lq035q1_fb_ops = {
527 .owner = THIS_MODULE,
528 .fb_open = bfin_lq035q1_fb_open,
529 .fb_release = bfin_lq035q1_fb_release,
530 .fb_check_var = bfin_lq035q1_fb_check_var,
531 .fb_fillrect = cfb_fillrect,
532 .fb_copyarea = cfb_copyarea,
533 .fb_imageblit = cfb_imageblit,
534 .fb_cursor = bfin_lq035q1_fb_cursor,
535 .fb_setcolreg = bfin_lq035q1_fb_setcolreg,
536 };
537
538 static irqreturn_t bfin_lq035q1_irq_error(int irq, void *dev_id)
539 {
540 /*struct bfin_lq035q1fb_info *info = (struct bfin_lq035q1fb_info *)dev_id;*/
541
542 u16 status = bfin_read_PPI_STATUS();
543 bfin_write_PPI_STATUS(-1);
544
545 if (status) {
546 bfin_lq035q1_disable_ppi();
547 disable_dma(CH_PPI);
548
549 /* start dma */
550 enable_dma(CH_PPI);
551 bfin_lq035q1_enable_ppi();
552 bfin_write_PPI_STATUS(-1);
553 }
554
555 return IRQ_HANDLED;
556 }
557
558 static int __devinit bfin_lq035q1_probe(struct platform_device *pdev)
559 {
560 struct bfin_lq035q1fb_info *info;
561 struct fb_info *fbinfo;
562 u32 active_video_mem_offset;
563 int ret;
564
565 ret = request_dma(CH_PPI, DRIVER_NAME"_CH_PPI");
566 if (ret < 0) {
567 dev_err(&pdev->dev, "PPI DMA unavailable\n");
568 goto out1;
569 }
570
571 fbinfo = framebuffer_alloc(sizeof(*info), &pdev->dev);
572 if (!fbinfo) {
573 ret = -ENOMEM;
574 goto out2;
575 }
576
577 info = fbinfo->par;
578 info->fb = fbinfo;
579 info->dev = &pdev->dev;
580
581 info->disp_info = pdev->dev.platform_data;
582
583 platform_set_drvdata(pdev, fbinfo);
584
585 ret = bfin_lq035q1_calc_timing(info);
586 if (ret < 0) {
587 dev_err(&pdev->dev, "Failed PPI Mode\n");
588 goto out3;
589 }
590
591 strcpy(fbinfo->fix.id, DRIVER_NAME);
592
593 fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
594 fbinfo->fix.type_aux = 0;
595 fbinfo->fix.xpanstep = 0;
596 fbinfo->fix.ypanstep = 0;
597 fbinfo->fix.ywrapstep = 0;
598 fbinfo->fix.accel = FB_ACCEL_NONE;
599 fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
600
601 fbinfo->var.nonstd = 0;
602 fbinfo->var.activate = FB_ACTIVATE_NOW;
603 fbinfo->var.height = -1;
604 fbinfo->var.width = -1;
605 fbinfo->var.accel_flags = 0;
606 fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
607
608 fbinfo->var.xres = LCD_X_RES;
609 fbinfo->var.xres_virtual = LCD_X_RES;
610 fbinfo->var.yres = LCD_Y_RES;
611 fbinfo->var.yres_virtual = LCD_Y_RES;
612 fbinfo->var.bits_per_pixel = info->lcd_bpp;
613
614 if (info->disp_info->mode & LQ035_BGR) {
615 if (info->lcd_bpp == 24) {
616 fbinfo->var.red.offset = 0;
617 fbinfo->var.green.offset = 8;
618 fbinfo->var.blue.offset = 16;
619 } else {
620 fbinfo->var.red.offset = 0;
621 fbinfo->var.green.offset = 5;
622 fbinfo->var.blue.offset = 11;
623 }
624 } else {
625 if (info->lcd_bpp == 24) {
626 fbinfo->var.red.offset = 16;
627 fbinfo->var.green.offset = 8;
628 fbinfo->var.blue.offset = 0;
629 } else {
630 fbinfo->var.red.offset = 11;
631 fbinfo->var.green.offset = 5;
632 fbinfo->var.blue.offset = 0;
633 }
634 }
635
636 fbinfo->var.transp.offset = 0;
637
638 if (info->lcd_bpp == 24) {
639 fbinfo->var.red.length = 8;
640 fbinfo->var.green.length = 8;
641 fbinfo->var.blue.length = 8;
642 } else {
643 fbinfo->var.red.length = 5;
644 fbinfo->var.green.length = 6;
645 fbinfo->var.blue.length = 5;
646 }
647
648 fbinfo->var.transp.length = 0;
649
650 active_video_mem_offset = ((U_LINE / 2) * LCD_X_RES * (info->lcd_bpp / 8));
651
652 fbinfo->fix.smem_len = LCD_X_RES * LCD_Y_RES * info->lcd_bpp / 8
653 + active_video_mem_offset;
654
655 fbinfo->fix.line_length = fbinfo->var.xres_virtual *
656 fbinfo->var.bits_per_pixel / 8;
657
658
659 fbinfo->fbops = &bfin_lq035q1_fb_ops;
660 fbinfo->flags = FBINFO_FLAG_DEFAULT;
661
662 info->fb_buffer =
663 dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
664 GFP_KERNEL);
665
666 if (NULL == info->fb_buffer) {
667 dev_err(&pdev->dev, "couldn't allocate dma buffer\n");
668 ret = -ENOMEM;
669 goto out3;
670 }
671
672 fbinfo->screen_base = (void *)info->fb_buffer + active_video_mem_offset;
673 fbinfo->fix.smem_start = (int)info->fb_buffer + active_video_mem_offset;
674
675 fbinfo->fbops = &bfin_lq035q1_fb_ops;
676
677 fbinfo->pseudo_palette = &info->pseudo_pal;
678
679 ret = fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0);
680 if (ret < 0) {
681 dev_err(&pdev->dev, "failed to allocate colormap (%d entries)\n",
682 BFIN_LCD_NBR_PALETTE_ENTRIES);
683 goto out4;
684 }
685
686 ret = bfin_lq035q1_request_ports(pdev,
687 info->disp_info->ppi_mode == USE_RGB565_16_BIT_PPI);
688 if (ret) {
689 dev_err(&pdev->dev, "couldn't request gpio port\n");
690 goto out6;
691 }
692
693 info->irq = platform_get_irq(pdev, 0);
694 if (info->irq < 0) {
695 ret = -EINVAL;
696 goto out7;
697 }
698
699 ret = request_irq(info->irq, bfin_lq035q1_irq_error, 0,
700 DRIVER_NAME" PPI ERROR", info);
701 if (ret < 0) {
702 dev_err(&pdev->dev, "unable to request PPI ERROR IRQ\n");
703 goto out7;
704 }
705
706 info->spidrv.driver.name = DRIVER_NAME"-spi";
707 info->spidrv.probe = lq035q1_spidev_probe;
708 info->spidrv.remove = __devexit_p(lq035q1_spidev_remove);
709 info->spidrv.shutdown = lq035q1_spidev_shutdown;
710 info->spidrv.suspend = lq035q1_spidev_suspend;
711 info->spidrv.resume = lq035q1_spidev_resume;
712
713 ret = spi_register_driver(&info->spidrv);
714 if (ret < 0) {
715 dev_err(&pdev->dev, "couldn't register SPI Interface\n");
716 goto out8;
717 }
718
719 if (info->disp_info->use_bl) {
720 ret = gpio_request_one(info->disp_info->gpio_bl,
721 GPIOF_OUT_INIT_LOW, "LQ035 Backlight");
722
723 if (ret) {
724 dev_err(&pdev->dev, "failed to request GPIO %d\n",
725 info->disp_info->gpio_bl);
726 goto out9;
727 }
728 }
729
730 ret = register_framebuffer(fbinfo);
731 if (ret < 0) {
732 dev_err(&pdev->dev, "unable to register framebuffer\n");
733 goto out10;
734 }
735
736 dev_info(&pdev->dev, "%dx%d %d-bit RGB FrameBuffer initialized\n",
737 LCD_X_RES, LCD_Y_RES, info->lcd_bpp);
738
739 return 0;
740
741 out10:
742 if (info->disp_info->use_bl)
743 gpio_free(info->disp_info->gpio_bl);
744 out9:
745 spi_unregister_driver(&info->spidrv);
746 out8:
747 free_irq(info->irq, info);
748 out7:
749 bfin_lq035q1_free_ports(info->disp_info->ppi_mode ==
750 USE_RGB565_16_BIT_PPI);
751 out6:
752 fb_dealloc_cmap(&fbinfo->cmap);
753 out4:
754 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
755 info->dma_handle);
756 out3:
757 framebuffer_release(fbinfo);
758 out2:
759 free_dma(CH_PPI);
760 out1:
761 platform_set_drvdata(pdev, NULL);
762
763 return ret;
764 }
765
766 static int __devexit bfin_lq035q1_remove(struct platform_device *pdev)
767 {
768 struct fb_info *fbinfo = platform_get_drvdata(pdev);
769 struct bfin_lq035q1fb_info *info = fbinfo->par;
770
771 if (info->disp_info->use_bl)
772 gpio_free(info->disp_info->gpio_bl);
773
774 spi_unregister_driver(&info->spidrv);
775
776 unregister_framebuffer(fbinfo);
777
778 free_dma(CH_PPI);
779 free_irq(info->irq, info);
780
781 if (info->fb_buffer != NULL)
782 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
783 info->dma_handle);
784
785 fb_dealloc_cmap(&fbinfo->cmap);
786
787 bfin_lq035q1_free_ports(info->disp_info->ppi_mode ==
788 USE_RGB565_16_BIT_PPI);
789
790 platform_set_drvdata(pdev, NULL);
791 framebuffer_release(fbinfo);
792
793 dev_info(&pdev->dev, "unregistered LCD driver\n");
794
795 return 0;
796 }
797
798 #ifdef CONFIG_PM
799 static int bfin_lq035q1_suspend(struct device *dev)
800 {
801 struct fb_info *fbinfo = dev_get_drvdata(dev);
802 struct bfin_lq035q1fb_info *info = fbinfo->par;
803
804 if (info->lq035_open_cnt) {
805 lq035q1_backlight(info, 0);
806 bfin_lq035q1_disable_ppi();
807 SSYNC();
808 disable_dma(CH_PPI);
809 bfin_lq035q1_stop_timers();
810 bfin_write_PPI_STATUS(-1);
811 }
812
813 return 0;
814 }
815
816 static int bfin_lq035q1_resume(struct device *dev)
817 {
818 struct fb_info *fbinfo = dev_get_drvdata(dev);
819 struct bfin_lq035q1fb_info *info = fbinfo->par;
820
821 if (info->lq035_open_cnt) {
822 bfin_lq035q1_disable_ppi();
823 SSYNC();
824
825 bfin_lq035q1_config_dma(info);
826 bfin_lq035q1_config_ppi(info);
827 bfin_lq035q1_init_timers(info);
828
829 /* start dma */
830 enable_dma(CH_PPI);
831 bfin_lq035q1_enable_ppi();
832 bfin_lq035q1_start_timers();
833 lq035q1_backlight(info, 1);
834 }
835
836 return 0;
837 }
838
839 static struct dev_pm_ops bfin_lq035q1_dev_pm_ops = {
840 .suspend = bfin_lq035q1_suspend,
841 .resume = bfin_lq035q1_resume,
842 };
843 #endif
844
845 static struct platform_driver bfin_lq035q1_driver = {
846 .probe = bfin_lq035q1_probe,
847 .remove = __devexit_p(bfin_lq035q1_remove),
848 .driver = {
849 .name = DRIVER_NAME,
850 #ifdef CONFIG_PM
851 .pm = &bfin_lq035q1_dev_pm_ops,
852 #endif
853 },
854 };
855
856 static int __init bfin_lq035q1_driver_init(void)
857 {
858 return platform_driver_register(&bfin_lq035q1_driver);
859 }
860 module_init(bfin_lq035q1_driver_init);
861
862 static void __exit bfin_lq035q1_driver_cleanup(void)
863 {
864 platform_driver_unregister(&bfin_lq035q1_driver);
865 }
866 module_exit(bfin_lq035q1_driver_cleanup);
867
868 MODULE_DESCRIPTION("Blackfin TFT LCD Driver");
869 MODULE_LICENSE("GPL");
Linux with added FPC-III support