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
lq035q1_control(struct spi_device * spi,unsigned char reg,unsigned short value)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
lq035q1_spidev_probe(struct spi_device * spi)140 static int 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
lq035q1_spidev_remove(struct spi_device * spi)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_SLEEP
lq035q1_spidev_suspend(struct device * dev)174 static int lq035q1_spidev_suspend(struct device *dev)
175 {
176 struct spi_device *spi = to_spi_device(dev);
177
178 return lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_SHUT);
179 }
180
lq035q1_spidev_resume(struct device * dev)181 static int lq035q1_spidev_resume(struct device *dev)
182 {
183 struct spi_device *spi = to_spi_device(dev);
184 struct spi_control *ctl = spi_get_drvdata(spi);
185 int ret;
186
187 ret = lq035q1_control(spi, LQ035_DRIVER_OUTPUT_CTL, ctl->mode);
188 if (ret)
189 return ret;
190
191 return lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_ON);
192 }
193
194 static SIMPLE_DEV_PM_OPS(lq035q1_spidev_pm_ops, lq035q1_spidev_suspend,
195 lq035q1_spidev_resume);
196 #define LQ035Q1_SPIDEV_PM_OPS (&lq035q1_spidev_pm_ops)
197
198 #else
199 #define LQ035Q1_SPIDEV_PM_OPS NULL
200 #endif
201
202 /* Power down all displays on reboot, poweroff or halt */
lq035q1_spidev_shutdown(struct spi_device * spi)203 static void lq035q1_spidev_shutdown(struct spi_device *spi)
204 {
205 lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_SHUT);
206 }
207
lq035q1_backlight(struct bfin_lq035q1fb_info * info,unsigned arg)208 static int lq035q1_backlight(struct bfin_lq035q1fb_info *info, unsigned arg)
209 {
210 if (info->disp_info->use_bl)
211 gpio_set_value(info->disp_info->gpio_bl, arg);
212
213 return 0;
214 }
215
bfin_lq035q1_calc_timing(struct bfin_lq035q1fb_info * fbi)216 static int bfin_lq035q1_calc_timing(struct bfin_lq035q1fb_info *fbi)
217 {
218 unsigned long clocks_per_pix, cpld_pipeline_delay_cor;
219
220 /*
221 * Interface 16/18-bit TFT over an 8-bit wide PPI using a small
222 * Programmable Logic Device (CPLD)
223 * http://blackfin.uclinux.org/gf/project/stamp/frs/?action=FrsReleaseBrowse&frs_package_id=165
224 */
225
226 switch (fbi->disp_info->ppi_mode) {
227 case USE_RGB565_16_BIT_PPI:
228 fbi->lcd_bpp = 16;
229 clocks_per_pix = 1;
230 cpld_pipeline_delay_cor = 0;
231 break;
232 case USE_RGB565_8_BIT_PPI:
233 fbi->lcd_bpp = 16;
234 clocks_per_pix = 2;
235 cpld_pipeline_delay_cor = 3;
236 break;
237 case USE_RGB888_8_BIT_PPI:
238 fbi->lcd_bpp = 24;
239 clocks_per_pix = 3;
240 cpld_pipeline_delay_cor = 5;
241 break;
242 default:
243 return -EINVAL;
244 }
245
246 /*
247 * HS and VS timing parameters (all in number of PPI clk ticks)
248 */
249
250 fbi->h_actpix = (LCD_X_RES * clocks_per_pix); /* active horizontal pixel */
251 fbi->h_period = (336 * clocks_per_pix); /* HS period */
252 fbi->h_pulse = (2 * clocks_per_pix); /* HS pulse width */
253 fbi->h_start = (7 * clocks_per_pix + cpld_pipeline_delay_cor); /* first valid pixel */
254
255 fbi->v_lines = (LCD_Y_RES + U_LINE); /* total vertical lines */
256 fbi->v_pulse = (2 * clocks_per_pix); /* VS pulse width (1-5 H_PERIODs) */
257 fbi->v_period = (fbi->h_period * fbi->v_lines); /* VS period */
258
259 return 0;
260 }
261
bfin_lq035q1_config_ppi(struct bfin_lq035q1fb_info * fbi)262 static void bfin_lq035q1_config_ppi(struct bfin_lq035q1fb_info *fbi)
263 {
264 unsigned ppi_pmode;
265
266 if (fbi->disp_info->ppi_mode == USE_RGB565_16_BIT_PPI)
267 ppi_pmode = DLEN_16;
268 else
269 ppi_pmode = (DLEN_8 | PACK_EN);
270
271 bfin_write_PPI_DELAY(fbi->h_start);
272 bfin_write_PPI_COUNT(fbi->h_actpix - 1);
273 bfin_write_PPI_FRAME(fbi->v_lines);
274
275 bfin_write_PPI_CONTROL(PPI_TX_MODE | /* output mode , PORT_DIR */
276 PPI_XFER_TYPE_11 | /* sync mode XFR_TYPE */
277 PPI_PORT_CFG_01 | /* two frame sync PORT_CFG */
278 ppi_pmode | /* 8/16 bit data length / PACK_EN? */
279 PPI_POLS_1); /* faling edge syncs POLS */
280 }
281
bfin_lq035q1_disable_ppi(void)282 static inline void bfin_lq035q1_disable_ppi(void)
283 {
284 bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() & ~PORT_EN);
285 }
286
bfin_lq035q1_enable_ppi(void)287 static inline void bfin_lq035q1_enable_ppi(void)
288 {
289 bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
290 }
291
bfin_lq035q1_start_timers(void)292 static void bfin_lq035q1_start_timers(void)
293 {
294 enable_gptimers(TIMER_VSYNCbit | TIMER_HSYNCbit);
295 }
296
bfin_lq035q1_stop_timers(void)297 static void bfin_lq035q1_stop_timers(void)
298 {
299 disable_gptimers(TIMER_HSYNCbit | TIMER_VSYNCbit);
300
301 set_gptimer_status(0, TIMER_HSYNC_STATUS_TRUN | TIMER_VSYNC_STATUS_TRUN |
302 TIMER_HSYNC_STATUS_TIMIL | TIMER_VSYNC_STATUS_TIMIL |
303 TIMER_HSYNC_STATUS_TOVF | TIMER_VSYNC_STATUS_TOVF);
304
305 }
306
bfin_lq035q1_init_timers(struct bfin_lq035q1fb_info * fbi)307 static void bfin_lq035q1_init_timers(struct bfin_lq035q1fb_info *fbi)
308 {
309
310 bfin_lq035q1_stop_timers();
311
312 set_gptimer_period(TIMER_HSYNC_id, fbi->h_period);
313 set_gptimer_pwidth(TIMER_HSYNC_id, fbi->h_pulse);
314 set_gptimer_config(TIMER_HSYNC_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
315 TIMER_TIN_SEL | TIMER_CLK_SEL|
316 TIMER_EMU_RUN);
317
318 set_gptimer_period(TIMER_VSYNC_id, fbi->v_period);
319 set_gptimer_pwidth(TIMER_VSYNC_id, fbi->v_pulse);
320 set_gptimer_config(TIMER_VSYNC_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
321 TIMER_TIN_SEL | TIMER_CLK_SEL |
322 TIMER_EMU_RUN);
323
324 }
325
bfin_lq035q1_config_dma(struct bfin_lq035q1fb_info * fbi)326 static void bfin_lq035q1_config_dma(struct bfin_lq035q1fb_info *fbi)
327 {
328
329
330 set_dma_config(CH_PPI,
331 set_bfin_dma_config(DIR_READ, DMA_FLOW_AUTO,
332 INTR_DISABLE, DIMENSION_2D,
333 DATA_SIZE_16,
334 DMA_NOSYNC_KEEP_DMA_BUF));
335 set_dma_x_count(CH_PPI, (LCD_X_RES * fbi->lcd_bpp) / DMA_BUS_SIZE);
336 set_dma_x_modify(CH_PPI, DMA_BUS_SIZE / 8);
337 set_dma_y_count(CH_PPI, fbi->v_lines);
338
339 set_dma_y_modify(CH_PPI, DMA_BUS_SIZE / 8);
340 set_dma_start_addr(CH_PPI, (unsigned long)fbi->fb_buffer);
341
342 }
343
344 static const u16 ppi0_req_16[] = {P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2,
345 P_PPI0_D0, P_PPI0_D1, P_PPI0_D2,
346 P_PPI0_D3, P_PPI0_D4, P_PPI0_D5,
347 P_PPI0_D6, P_PPI0_D7, P_PPI0_D8,
348 P_PPI0_D9, P_PPI0_D10, P_PPI0_D11,
349 P_PPI0_D12, P_PPI0_D13, P_PPI0_D14,
350 P_PPI0_D15, 0};
351
352 static const u16 ppi0_req_8[] = {P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2,
353 P_PPI0_D0, P_PPI0_D1, P_PPI0_D2,
354 P_PPI0_D3, P_PPI0_D4, P_PPI0_D5,
355 P_PPI0_D6, P_PPI0_D7, 0};
356
bfin_lq035q1_free_ports(unsigned ppi16)357 static inline void bfin_lq035q1_free_ports(unsigned ppi16)
358 {
359 if (ppi16)
360 peripheral_free_list(ppi0_req_16);
361 else
362 peripheral_free_list(ppi0_req_8);
363
364 if (ANOMALY_05000400)
365 gpio_free(P_IDENT(P_PPI0_FS3));
366 }
367
bfin_lq035q1_request_ports(struct platform_device * pdev,unsigned ppi16)368 static int bfin_lq035q1_request_ports(struct platform_device *pdev,
369 unsigned ppi16)
370 {
371 int ret;
372 /* ANOMALY_05000400 - PPI Does Not Start Properly In Specific Mode:
373 * Drive PPI_FS3 Low
374 */
375 if (ANOMALY_05000400) {
376 int ret = gpio_request_one(P_IDENT(P_PPI0_FS3),
377 GPIOF_OUT_INIT_LOW, "PPI_FS3");
378 if (ret)
379 return ret;
380 }
381
382 if (ppi16)
383 ret = peripheral_request_list(ppi0_req_16, DRIVER_NAME);
384 else
385 ret = peripheral_request_list(ppi0_req_8, DRIVER_NAME);
386
387 if (ret) {
388 dev_err(&pdev->dev, "requesting peripherals failed\n");
389 return -EFAULT;
390 }
391
392 return 0;
393 }
394
bfin_lq035q1_fb_open(struct fb_info * info,int user)395 static int bfin_lq035q1_fb_open(struct fb_info *info, int user)
396 {
397 struct bfin_lq035q1fb_info *fbi = info->par;
398
399 spin_lock(&fbi->lock);
400 fbi->lq035_open_cnt++;
401
402 if (fbi->lq035_open_cnt <= 1) {
403
404 bfin_lq035q1_disable_ppi();
405 SSYNC();
406
407 bfin_lq035q1_config_dma(fbi);
408 bfin_lq035q1_config_ppi(fbi);
409 bfin_lq035q1_init_timers(fbi);
410
411 /* start dma */
412 enable_dma(CH_PPI);
413 bfin_lq035q1_enable_ppi();
414 bfin_lq035q1_start_timers();
415 lq035q1_backlight(fbi, 1);
416 }
417
418 spin_unlock(&fbi->lock);
419
420 return 0;
421 }
422
bfin_lq035q1_fb_release(struct fb_info * info,int user)423 static int bfin_lq035q1_fb_release(struct fb_info *info, int user)
424 {
425 struct bfin_lq035q1fb_info *fbi = info->par;
426
427 spin_lock(&fbi->lock);
428
429 fbi->lq035_open_cnt--;
430
431 if (fbi->lq035_open_cnt <= 0) {
432 lq035q1_backlight(fbi, 0);
433 bfin_lq035q1_disable_ppi();
434 SSYNC();
435 disable_dma(CH_PPI);
436 bfin_lq035q1_stop_timers();
437 }
438
439 spin_unlock(&fbi->lock);
440
441 return 0;
442 }
443
bfin_lq035q1_fb_check_var(struct fb_var_screeninfo * var,struct fb_info * info)444 static int bfin_lq035q1_fb_check_var(struct fb_var_screeninfo *var,
445 struct fb_info *info)
446 {
447 struct bfin_lq035q1fb_info *fbi = info->par;
448
449 if (var->bits_per_pixel == fbi->lcd_bpp) {
450 var->red.offset = info->var.red.offset;
451 var->green.offset = info->var.green.offset;
452 var->blue.offset = info->var.blue.offset;
453 var->red.length = info->var.red.length;
454 var->green.length = info->var.green.length;
455 var->blue.length = info->var.blue.length;
456 var->transp.offset = 0;
457 var->transp.length = 0;
458 var->transp.msb_right = 0;
459 var->red.msb_right = 0;
460 var->green.msb_right = 0;
461 var->blue.msb_right = 0;
462 } else {
463 pr_debug("%s: depth not supported: %u BPP\n", __func__,
464 var->bits_per_pixel);
465 return -EINVAL;
466 }
467
468 if (info->var.xres != var->xres || info->var.yres != var->yres ||
469 info->var.xres_virtual != var->xres_virtual ||
470 info->var.yres_virtual != var->yres_virtual) {
471 pr_debug("%s: Resolution not supported: X%u x Y%u \n",
472 __func__, var->xres, var->yres);
473 return -EINVAL;
474 }
475
476 /*
477 * Memory limit
478 */
479
480 if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
481 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
482 __func__, var->yres_virtual);
483 return -ENOMEM;
484 }
485
486
487 return 0;
488 }
489
bfin_lq035q1_fb_cursor(struct fb_info * info,struct fb_cursor * cursor)490 int bfin_lq035q1_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
491 {
492 if (nocursor)
493 return 0;
494 else
495 return -EINVAL; /* just to force soft_cursor() call */
496 }
497
bfin_lq035q1_fb_setcolreg(u_int regno,u_int red,u_int green,u_int blue,u_int transp,struct fb_info * info)498 static int bfin_lq035q1_fb_setcolreg(u_int regno, u_int red, u_int green,
499 u_int blue, u_int transp,
500 struct fb_info *info)
501 {
502 if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
503 return -EINVAL;
504
505 if (info->var.grayscale) {
506 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
507 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
508 }
509
510 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
511
512 u32 value;
513 /* Place color in the pseudopalette */
514 if (regno > 16)
515 return -EINVAL;
516
517 red >>= (16 - info->var.red.length);
518 green >>= (16 - info->var.green.length);
519 blue >>= (16 - info->var.blue.length);
520
521 value = (red << info->var.red.offset) |
522 (green << info->var.green.offset) |
523 (blue << info->var.blue.offset);
524 value &= 0xFFFFFF;
525
526 ((u32 *) (info->pseudo_palette))[regno] = value;
527
528 }
529
530 return 0;
531 }
532
533 static struct fb_ops bfin_lq035q1_fb_ops = {
534 .owner = THIS_MODULE,
535 .fb_open = bfin_lq035q1_fb_open,
536 .fb_release = bfin_lq035q1_fb_release,
537 .fb_check_var = bfin_lq035q1_fb_check_var,
538 .fb_fillrect = cfb_fillrect,
539 .fb_copyarea = cfb_copyarea,
540 .fb_imageblit = cfb_imageblit,
541 .fb_cursor = bfin_lq035q1_fb_cursor,
542 .fb_setcolreg = bfin_lq035q1_fb_setcolreg,
543 };
544
bfin_lq035q1_irq_error(int irq,void * dev_id)545 static irqreturn_t bfin_lq035q1_irq_error(int irq, void *dev_id)
546 {
547 /*struct bfin_lq035q1fb_info *info = (struct bfin_lq035q1fb_info *)dev_id;*/
548
549 u16 status = bfin_read_PPI_STATUS();
550 bfin_write_PPI_STATUS(-1);
551
552 if (status) {
553 bfin_lq035q1_disable_ppi();
554 disable_dma(CH_PPI);
555
556 /* start dma */
557 enable_dma(CH_PPI);
558 bfin_lq035q1_enable_ppi();
559 bfin_write_PPI_STATUS(-1);
560 }
561
562 return IRQ_HANDLED;
563 }
564
bfin_lq035q1_probe(struct platform_device * pdev)565 static int bfin_lq035q1_probe(struct platform_device *pdev)
566 {
567 struct bfin_lq035q1fb_info *info;
568 struct fb_info *fbinfo;
569 u32 active_video_mem_offset;
570 int ret;
571
572 ret = request_dma(CH_PPI, DRIVER_NAME"_CH_PPI");
573 if (ret < 0) {
574 dev_err(&pdev->dev, "PPI DMA unavailable\n");
575 goto out1;
576 }
577
578 fbinfo = framebuffer_alloc(sizeof(*info), &pdev->dev);
579 if (!fbinfo) {
580 ret = -ENOMEM;
581 goto out2;
582 }
583
584 info = fbinfo->par;
585 info->fb = fbinfo;
586 info->dev = &pdev->dev;
587 spin_lock_init(&info->lock);
588
589 info->disp_info = pdev->dev.platform_data;
590
591 platform_set_drvdata(pdev, fbinfo);
592
593 ret = bfin_lq035q1_calc_timing(info);
594 if (ret < 0) {
595 dev_err(&pdev->dev, "Failed PPI Mode\n");
596 goto out3;
597 }
598
599 strcpy(fbinfo->fix.id, DRIVER_NAME);
600
601 fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
602 fbinfo->fix.type_aux = 0;
603 fbinfo->fix.xpanstep = 0;
604 fbinfo->fix.ypanstep = 0;
605 fbinfo->fix.ywrapstep = 0;
606 fbinfo->fix.accel = FB_ACCEL_NONE;
607 fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
608
609 fbinfo->var.nonstd = 0;
610 fbinfo->var.activate = FB_ACTIVATE_NOW;
611 fbinfo->var.height = -1;
612 fbinfo->var.width = -1;
613 fbinfo->var.accel_flags = 0;
614 fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
615
616 fbinfo->var.xres = LCD_X_RES;
617 fbinfo->var.xres_virtual = LCD_X_RES;
618 fbinfo->var.yres = LCD_Y_RES;
619 fbinfo->var.yres_virtual = LCD_Y_RES;
620 fbinfo->var.bits_per_pixel = info->lcd_bpp;
621
622 if (info->disp_info->mode & LQ035_BGR) {
623 if (info->lcd_bpp == 24) {
624 fbinfo->var.red.offset = 0;
625 fbinfo->var.green.offset = 8;
626 fbinfo->var.blue.offset = 16;
627 } else {
628 fbinfo->var.red.offset = 0;
629 fbinfo->var.green.offset = 5;
630 fbinfo->var.blue.offset = 11;
631 }
632 } else {
633 if (info->lcd_bpp == 24) {
634 fbinfo->var.red.offset = 16;
635 fbinfo->var.green.offset = 8;
636 fbinfo->var.blue.offset = 0;
637 } else {
638 fbinfo->var.red.offset = 11;
639 fbinfo->var.green.offset = 5;
640 fbinfo->var.blue.offset = 0;
641 }
642 }
643
644 fbinfo->var.transp.offset = 0;
645
646 if (info->lcd_bpp == 24) {
647 fbinfo->var.red.length = 8;
648 fbinfo->var.green.length = 8;
649 fbinfo->var.blue.length = 8;
650 } else {
651 fbinfo->var.red.length = 5;
652 fbinfo->var.green.length = 6;
653 fbinfo->var.blue.length = 5;
654 }
655
656 fbinfo->var.transp.length = 0;
657
658 active_video_mem_offset = ((U_LINE / 2) * LCD_X_RES * (info->lcd_bpp / 8));
659
660 fbinfo->fix.smem_len = LCD_X_RES * LCD_Y_RES * info->lcd_bpp / 8
661 + active_video_mem_offset;
662
663 fbinfo->fix.line_length = fbinfo->var.xres_virtual *
664 fbinfo->var.bits_per_pixel / 8;
665
666
667 fbinfo->fbops = &bfin_lq035q1_fb_ops;
668 fbinfo->flags = FBINFO_FLAG_DEFAULT;
669
670 info->fb_buffer =
671 dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
672 GFP_KERNEL);
673
674 if (NULL == info->fb_buffer) {
675 dev_err(&pdev->dev, "couldn't allocate dma buffer\n");
676 ret = -ENOMEM;
677 goto out3;
678 }
679
680 fbinfo->screen_base = (void *)info->fb_buffer + active_video_mem_offset;
681 fbinfo->fix.smem_start = (int)info->fb_buffer + active_video_mem_offset;
682
683 fbinfo->fbops = &bfin_lq035q1_fb_ops;
684
685 fbinfo->pseudo_palette = &info->pseudo_pal;
686
687 ret = fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0);
688 if (ret < 0) {
689 dev_err(&pdev->dev, "failed to allocate colormap (%d entries)\n",
690 BFIN_LCD_NBR_PALETTE_ENTRIES);
691 goto out4;
692 }
693
694 ret = bfin_lq035q1_request_ports(pdev,
695 info->disp_info->ppi_mode == USE_RGB565_16_BIT_PPI);
696 if (ret) {
697 dev_err(&pdev->dev, "couldn't request gpio port\n");
698 goto out6;
699 }
700
701 info->irq = platform_get_irq(pdev, 0);
702 if (info->irq < 0) {
703 ret = -EINVAL;
704 goto out7;
705 }
706
707 ret = request_irq(info->irq, bfin_lq035q1_irq_error, 0,
708 DRIVER_NAME" PPI ERROR", info);
709 if (ret < 0) {
710 dev_err(&pdev->dev, "unable to request PPI ERROR IRQ\n");
711 goto out7;
712 }
713
714 info->spidrv.driver.name = DRIVER_NAME"-spi";
715 info->spidrv.probe = lq035q1_spidev_probe;
716 info->spidrv.remove = lq035q1_spidev_remove;
717 info->spidrv.shutdown = lq035q1_spidev_shutdown;
718 info->spidrv.driver.pm = LQ035Q1_SPIDEV_PM_OPS;
719
720 ret = spi_register_driver(&info->spidrv);
721 if (ret < 0) {
722 dev_err(&pdev->dev, "couldn't register SPI Interface\n");
723 goto out8;
724 }
725
726 if (info->disp_info->use_bl) {
727 ret = gpio_request_one(info->disp_info->gpio_bl,
728 GPIOF_OUT_INIT_LOW, "LQ035 Backlight");
729
730 if (ret) {
731 dev_err(&pdev->dev, "failed to request GPIO %d\n",
732 info->disp_info->gpio_bl);
733 goto out9;
734 }
735 }
736
737 ret = register_framebuffer(fbinfo);
738 if (ret < 0) {
739 dev_err(&pdev->dev, "unable to register framebuffer\n");
740 goto out10;
741 }
742
743 dev_info(&pdev->dev, "%dx%d %d-bit RGB FrameBuffer initialized\n",
744 LCD_X_RES, LCD_Y_RES, info->lcd_bpp);
745
746 return 0;
747
748 out10:
749 if (info->disp_info->use_bl)
750 gpio_free(info->disp_info->gpio_bl);
751 out9:
752 spi_unregister_driver(&info->spidrv);
753 out8:
754 free_irq(info->irq, info);
755 out7:
756 bfin_lq035q1_free_ports(info->disp_info->ppi_mode ==
757 USE_RGB565_16_BIT_PPI);
758 out6:
759 fb_dealloc_cmap(&fbinfo->cmap);
760 out4:
761 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
762 info->dma_handle);
763 out3:
764 framebuffer_release(fbinfo);
765 out2:
766 free_dma(CH_PPI);
767 out1:
768
769 return ret;
770 }
771
bfin_lq035q1_remove(struct platform_device * pdev)772 static int bfin_lq035q1_remove(struct platform_device *pdev)
773 {
774 struct fb_info *fbinfo = platform_get_drvdata(pdev);
775 struct bfin_lq035q1fb_info *info = fbinfo->par;
776
777 if (info->disp_info->use_bl)
778 gpio_free(info->disp_info->gpio_bl);
779
780 spi_unregister_driver(&info->spidrv);
781
782 unregister_framebuffer(fbinfo);
783
784 free_dma(CH_PPI);
785 free_irq(info->irq, info);
786
787 if (info->fb_buffer != NULL)
788 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
789 info->dma_handle);
790
791 fb_dealloc_cmap(&fbinfo->cmap);
792
793 bfin_lq035q1_free_ports(info->disp_info->ppi_mode ==
794 USE_RGB565_16_BIT_PPI);
795
796 framebuffer_release(fbinfo);
797
798 dev_info(&pdev->dev, "unregistered LCD driver\n");
799
800 return 0;
801 }
802
803 #ifdef CONFIG_PM
bfin_lq035q1_suspend(struct device * dev)804 static int bfin_lq035q1_suspend(struct device *dev)
805 {
806 struct fb_info *fbinfo = dev_get_drvdata(dev);
807 struct bfin_lq035q1fb_info *info = fbinfo->par;
808
809 if (info->lq035_open_cnt) {
810 lq035q1_backlight(info, 0);
811 bfin_lq035q1_disable_ppi();
812 SSYNC();
813 disable_dma(CH_PPI);
814 bfin_lq035q1_stop_timers();
815 bfin_write_PPI_STATUS(-1);
816 }
817
818 return 0;
819 }
820
bfin_lq035q1_resume(struct device * dev)821 static int bfin_lq035q1_resume(struct device *dev)
822 {
823 struct fb_info *fbinfo = dev_get_drvdata(dev);
824 struct bfin_lq035q1fb_info *info = fbinfo->par;
825
826 if (info->lq035_open_cnt) {
827 bfin_lq035q1_disable_ppi();
828 SSYNC();
829
830 bfin_lq035q1_config_dma(info);
831 bfin_lq035q1_config_ppi(info);
832 bfin_lq035q1_init_timers(info);
833
834 /* start dma */
835 enable_dma(CH_PPI);
836 bfin_lq035q1_enable_ppi();
837 bfin_lq035q1_start_timers();
838 lq035q1_backlight(info, 1);
839 }
840
841 return 0;
842 }
843
844 static struct dev_pm_ops bfin_lq035q1_dev_pm_ops = {
845 .suspend = bfin_lq035q1_suspend,
846 .resume = bfin_lq035q1_resume,
847 };
848 #endif
849
850 static struct platform_driver bfin_lq035q1_driver = {
851 .probe = bfin_lq035q1_probe,
852 .remove = bfin_lq035q1_remove,
853 .driver = {
854 .name = DRIVER_NAME,
855 #ifdef CONFIG_PM
856 .pm = &bfin_lq035q1_dev_pm_ops,
857 #endif
858 },
859 };
860
861 module_platform_driver(bfin_lq035q1_driver);
862
863 MODULE_DESCRIPTION("Blackfin TFT LCD Driver");
864 MODULE_LICENSE("GPL");
865