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drivers/staging/usbip/userspace/libsrc/vhci_driver.c: test the just-initialized value
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / video / bfin-lq035q1-fb.c
blob23b6c4b62c78cdd642083b7b36245dca2d13d5e6
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/slab.h>
17 #include <linux/init.h>
18 #include <linux/types.h>
19 #include <linux/interrupt.h>
20 #include <linux/device.h>
21 #include <linux/backlight.h>
22 #include <linux/lcd.h>
23 #include <linux/dma-mapping.h>
24 #include <linux/platform_device.h>
25 #include <linux/spi/spi.h>
26
27 #include <asm/blackfin.h>
28 #include <asm/irq.h>
29 #include <asm/dma.h>
30 #include <asm/portmux.h>
31 #include <asm/gptimers.h>
32
33 #include <asm/bfin-lq035q1.h>
34
35 #if defined(BF533_FAMILY) || defined(BF538_FAMILY)
36 #define TIMER_HSYNC_id TIMER1_id
37 #define TIMER_HSYNCbit TIMER1bit
38 #define TIMER_HSYNC_STATUS_TRUN TIMER_STATUS_TRUN1
39 #define TIMER_HSYNC_STATUS_TIMIL TIMER_STATUS_TIMIL1
40 #define TIMER_HSYNC_STATUS_TOVF TIMER_STATUS_TOVF1
41
42 #define TIMER_VSYNC_id TIMER2_id
43 #define TIMER_VSYNCbit TIMER2bit
44 #define TIMER_VSYNC_STATUS_TRUN TIMER_STATUS_TRUN2
45 #define TIMER_VSYNC_STATUS_TIMIL TIMER_STATUS_TIMIL2
46 #define TIMER_VSYNC_STATUS_TOVF TIMER_STATUS_TOVF2
47 #else
48 #define TIMER_HSYNC_id TIMER0_id
49 #define TIMER_HSYNCbit TIMER0bit
50 #define TIMER_HSYNC_STATUS_TRUN TIMER_STATUS_TRUN0
51 #define TIMER_HSYNC_STATUS_TIMIL TIMER_STATUS_TIMIL0
52 #define TIMER_HSYNC_STATUS_TOVF TIMER_STATUS_TOVF0
53
54 #define TIMER_VSYNC_id TIMER1_id
55 #define TIMER_VSYNCbit TIMER1bit
56 #define TIMER_VSYNC_STATUS_TRUN TIMER_STATUS_TRUN1
57 #define TIMER_VSYNC_STATUS_TIMIL TIMER_STATUS_TIMIL1
58 #define TIMER_VSYNC_STATUS_TOVF TIMER_STATUS_TOVF1
59 #endif
60
61 #define LCD_X_RES 320 /* Horizontal Resolution */
62 #define LCD_Y_RES 240 /* Vertical Resolution */
63 #define DMA_BUS_SIZE 16
64 #define U_LINE 4 /* Blanking Lines */
65
66
67 /* Interface 16/18-bit TFT over an 8-bit wide PPI using a small Programmable Logic Device (CPLD)
68 * http://blackfin.uclinux.org/gf/project/stamp/frs/?action=FrsReleaseBrowse&frs_package_id=165
69 */
70
71
72 #define BFIN_LCD_NBR_PALETTE_ENTRIES 256
73
74 #define PPI_TX_MODE 0x2
75 #define PPI_XFER_TYPE_11 0xC
76 #define PPI_PORT_CFG_01 0x10
77 #define PPI_POLS_1 0x8000
78
79 #define LQ035_INDEX 0x74
80 #define LQ035_DATA 0x76
81
82 #define LQ035_DRIVER_OUTPUT_CTL 0x1
83 #define LQ035_SHUT_CTL 0x11
84
85 #define LQ035_DRIVER_OUTPUT_MASK (LQ035_LR | LQ035_TB | LQ035_BGR | LQ035_REV)
86 #define LQ035_DRIVER_OUTPUT_DEFAULT (0x2AEF & ~LQ035_DRIVER_OUTPUT_MASK)
87
88 #define LQ035_SHUT (1 << 0) /* Shutdown */
89 #define LQ035_ON (0 << 0) /* Shutdown */
90
91 struct bfin_lq035q1fb_info {
92 struct fb_info *fb;
93 struct device *dev;
94 struct spi_driver spidrv;
95 struct bfin_lq035q1fb_disp_info *disp_info;
96 unsigned char *fb_buffer; /* RGB Buffer */
97 dma_addr_t dma_handle;
98 int lq035_open_cnt;
99 int irq;
100 spinlock_t lock; /* lock */
101 u32 pseudo_pal[16];
102
103 u32 lcd_bpp;
104 u32 h_actpix;
105 u32 h_period;
106 u32 h_pulse;
107 u32 h_start;
108 u32 v_lines;
109 u32 v_pulse;
110 u32 v_period;
111 };
112
113 static int nocursor;
114 module_param(nocursor, int, 0644);
115 MODULE_PARM_DESC(nocursor, "cursor enable/disable");
116
117 struct spi_control {
118 unsigned short mode;
119 };
120
121 static int lq035q1_control(struct spi_device *spi, unsigned char reg, unsigned short value)
122 {
123 int ret;
124 u8 regs[3] = { LQ035_INDEX, 0, 0 };
125 u8 dat[3] = { LQ035_DATA, 0, 0 };
126
127 if (!spi)
128 return -ENODEV;
129
130 regs[2] = reg;
131 dat[1] = value >> 8;
132 dat[2] = value & 0xFF;
133
134 ret = spi_write(spi, regs, ARRAY_SIZE(regs));
135 ret |= spi_write(spi, dat, ARRAY_SIZE(dat));
136 return ret;
137 }
138
139 static int __devinit lq035q1_spidev_probe(struct spi_device *spi)
140 {
141 int ret;
142 struct spi_control *ctl;
143 struct bfin_lq035q1fb_info *info = container_of(spi->dev.driver,
144 struct bfin_lq035q1fb_info,
145 spidrv.driver);
146
147 ctl = kzalloc(sizeof(*ctl), GFP_KERNEL);
148
149 if (!ctl)
150 return -ENOMEM;
151
152 ctl->mode = (info->disp_info->mode &
153 LQ035_DRIVER_OUTPUT_MASK) | LQ035_DRIVER_OUTPUT_DEFAULT;
154
155 ret = lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_ON);
156 ret |= lq035q1_control(spi, LQ035_DRIVER_OUTPUT_CTL, ctl->mode);
157 if (ret) {
158 kfree(ctl);
159 return ret;
160 }
161
162 spi_set_drvdata(spi, ctl);
163
164 return 0;
165 }
166
167 static int lq035q1_spidev_remove(struct spi_device *spi)
168 {
169 return lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_SHUT);
170 }
171
172 #ifdef CONFIG_PM
173 static int lq035q1_spidev_suspend(struct spi_device *spi, pm_message_t state)
174 {
175 return lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_SHUT);
176 }
177
178 static int lq035q1_spidev_resume(struct spi_device *spi)
179 {
180 int ret;
181 struct spi_control *ctl = spi_get_drvdata(spi);
182
183 ret = lq035q1_control(spi, LQ035_DRIVER_OUTPUT_CTL, ctl->mode);
184 if (ret)
185 return ret;
186
187 return lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_ON);
188 }
189 #else
190 # define lq035q1_spidev_suspend NULL
191 # define lq035q1_spidev_resume NULL
192 #endif
193
194 /* Power down all displays on reboot, poweroff or halt */
195 static void lq035q1_spidev_shutdown(struct spi_device *spi)
196 {
197 lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_SHUT);
198 }
199
200 static int lq035q1_backlight(struct bfin_lq035q1fb_info *info, unsigned arg)
201 {
202 if (info->disp_info->use_bl)
203 gpio_set_value(info->disp_info->gpio_bl, arg);
204
205 return 0;
206 }
207
208 static int bfin_lq035q1_calc_timing(struct bfin_lq035q1fb_info *fbi)
209 {
210 unsigned long clocks_per_pix, cpld_pipeline_delay_cor;
211
212 /*
213 * Interface 16/18-bit TFT over an 8-bit wide PPI using a small
214 * Programmable Logic Device (CPLD)
215 * http://blackfin.uclinux.org/gf/project/stamp/frs/?action=FrsReleaseBrowse&frs_package_id=165
216 */
217
218 switch (fbi->disp_info->ppi_mode) {
219 case USE_RGB565_16_BIT_PPI:
220 fbi->lcd_bpp = 16;
221 clocks_per_pix = 1;
222 cpld_pipeline_delay_cor = 0;
223 break;
224 case USE_RGB565_8_BIT_PPI:
225 fbi->lcd_bpp = 16;
226 clocks_per_pix = 2;
227 cpld_pipeline_delay_cor = 3;
228 break;
229 case USE_RGB888_8_BIT_PPI:
230 fbi->lcd_bpp = 24;
231 clocks_per_pix = 3;
232 cpld_pipeline_delay_cor = 5;
233 break;
234 default:
235 return -EINVAL;
236 }
237
238 /*
239 * HS and VS timing parameters (all in number of PPI clk ticks)
240 */
241
242 fbi->h_actpix = (LCD_X_RES * clocks_per_pix); /* active horizontal pixel */
243 fbi->h_period = (336 * clocks_per_pix); /* HS period */
244 fbi->h_pulse = (2 * clocks_per_pix); /* HS pulse width */
245 fbi->h_start = (7 * clocks_per_pix + cpld_pipeline_delay_cor); /* first valid pixel */
246
247 fbi->v_lines = (LCD_Y_RES + U_LINE); /* total vertical lines */
248 fbi->v_pulse = (2 * clocks_per_pix); /* VS pulse width (1-5 H_PERIODs) */
249 fbi->v_period = (fbi->h_period * fbi->v_lines); /* VS period */
250
251 return 0;
252 }
253
254 static void bfin_lq035q1_config_ppi(struct bfin_lq035q1fb_info *fbi)
255 {
256 unsigned ppi_pmode;
257
258 if (fbi->disp_info->ppi_mode == USE_RGB565_16_BIT_PPI)
259 ppi_pmode = DLEN_16;
260 else
261 ppi_pmode = (DLEN_8 | PACK_EN);
262
263 bfin_write_PPI_DELAY(fbi->h_start);
264 bfin_write_PPI_COUNT(fbi->h_actpix - 1);
265 bfin_write_PPI_FRAME(fbi->v_lines);
266
267 bfin_write_PPI_CONTROL(PPI_TX_MODE | /* output mode , PORT_DIR */
268 PPI_XFER_TYPE_11 | /* sync mode XFR_TYPE */
269 PPI_PORT_CFG_01 | /* two frame sync PORT_CFG */
270 ppi_pmode | /* 8/16 bit data length / PACK_EN? */
271 PPI_POLS_1); /* faling edge syncs POLS */
272 }
273
274 static inline void bfin_lq035q1_disable_ppi(void)
275 {
276 bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() & ~PORT_EN);
277 }
278
279 static inline void bfin_lq035q1_enable_ppi(void)
280 {
281 bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
282 }
283
284 static void bfin_lq035q1_start_timers(void)
285 {
286 enable_gptimers(TIMER_VSYNCbit | TIMER_HSYNCbit);
287 }
288
289 static void bfin_lq035q1_stop_timers(void)
290 {
291 disable_gptimers(TIMER_HSYNCbit | TIMER_VSYNCbit);
292
293 set_gptimer_status(0, TIMER_HSYNC_STATUS_TRUN | TIMER_VSYNC_STATUS_TRUN |
294 TIMER_HSYNC_STATUS_TIMIL | TIMER_VSYNC_STATUS_TIMIL |
295 TIMER_HSYNC_STATUS_TOVF | TIMER_VSYNC_STATUS_TOVF);
296
297 }
298
299 static void bfin_lq035q1_init_timers(struct bfin_lq035q1fb_info *fbi)
300 {
301
302 bfin_lq035q1_stop_timers();
303
304 set_gptimer_period(TIMER_HSYNC_id, fbi->h_period);
305 set_gptimer_pwidth(TIMER_HSYNC_id, fbi->h_pulse);
306 set_gptimer_config(TIMER_HSYNC_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
307 TIMER_TIN_SEL | TIMER_CLK_SEL|
308 TIMER_EMU_RUN);
309
310 set_gptimer_period(TIMER_VSYNC_id, fbi->v_period);
311 set_gptimer_pwidth(TIMER_VSYNC_id, fbi->v_pulse);
312 set_gptimer_config(TIMER_VSYNC_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
313 TIMER_TIN_SEL | TIMER_CLK_SEL |
314 TIMER_EMU_RUN);
315
316 }
317
318 static void bfin_lq035q1_config_dma(struct bfin_lq035q1fb_info *fbi)
319 {
320
321
322 set_dma_config(CH_PPI,
323 set_bfin_dma_config(DIR_READ, DMA_FLOW_AUTO,
324 INTR_DISABLE, DIMENSION_2D,
325 DATA_SIZE_16,
326 DMA_NOSYNC_KEEP_DMA_BUF));
327 set_dma_x_count(CH_PPI, (LCD_X_RES * fbi->lcd_bpp) / DMA_BUS_SIZE);
328 set_dma_x_modify(CH_PPI, DMA_BUS_SIZE / 8);
329 set_dma_y_count(CH_PPI, fbi->v_lines);
330
331 set_dma_y_modify(CH_PPI, DMA_BUS_SIZE / 8);
332 set_dma_start_addr(CH_PPI, (unsigned long)fbi->fb_buffer);
333
334 }
335
336 static const u16 ppi0_req_16[] = {P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2,
337 P_PPI0_D0, P_PPI0_D1, P_PPI0_D2,
338 P_PPI0_D3, P_PPI0_D4, P_PPI0_D5,
339 P_PPI0_D6, P_PPI0_D7, P_PPI0_D8,
340 P_PPI0_D9, P_PPI0_D10, P_PPI0_D11,
341 P_PPI0_D12, P_PPI0_D13, P_PPI0_D14,
342 P_PPI0_D15, 0};
343
344 static const u16 ppi0_req_8[] = {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, 0};
348
349 static inline void bfin_lq035q1_free_ports(unsigned ppi16)
350 {
351 if (ppi16)
352 peripheral_free_list(ppi0_req_16);
353 else
354 peripheral_free_list(ppi0_req_8);
355
356 if (ANOMALY_05000400)
357 gpio_free(P_IDENT(P_PPI0_FS3));
358 }
359
360 static int __devinit bfin_lq035q1_request_ports(struct platform_device *pdev,
361 unsigned ppi16)
362 {
363 int ret;
364 /* ANOMALY_05000400 - PPI Does Not Start Properly In Specific Mode:
365 * Drive PPI_FS3 Low
366 */
367 if (ANOMALY_05000400) {
368 int ret = gpio_request(P_IDENT(P_PPI0_FS3), "PPI_FS3");
369 if (ret)
370 return ret;
371 gpio_direction_output(P_IDENT(P_PPI0_FS3), 0);
372 }
373
374 if (ppi16)
375 ret = peripheral_request_list(ppi0_req_16, DRIVER_NAME);
376 else
377 ret = peripheral_request_list(ppi0_req_8, DRIVER_NAME);
378
379 if (ret) {
380 dev_err(&pdev->dev, "requesting peripherals failed\n");
381 return -EFAULT;
382 }
383
384 return 0;
385 }
386
387 static int bfin_lq035q1_fb_open(struct fb_info *info, int user)
388 {
389 struct bfin_lq035q1fb_info *fbi = info->par;
390
391 spin_lock(&fbi->lock);
392 fbi->lq035_open_cnt++;
393
394 if (fbi->lq035_open_cnt <= 1) {
395
396 bfin_lq035q1_disable_ppi();
397 SSYNC();
398
399 bfin_lq035q1_config_dma(fbi);
400 bfin_lq035q1_config_ppi(fbi);
401 bfin_lq035q1_init_timers(fbi);
402
403 /* start dma */
404 enable_dma(CH_PPI);
405 bfin_lq035q1_enable_ppi();
406 bfin_lq035q1_start_timers();
407 lq035q1_backlight(fbi, 1);
408 }
409
410 spin_unlock(&fbi->lock);
411
412 return 0;
413 }
414
415 static int bfin_lq035q1_fb_release(struct fb_info *info, int user)
416 {
417 struct bfin_lq035q1fb_info *fbi = info->par;
418
419 spin_lock(&fbi->lock);
420
421 fbi->lq035_open_cnt--;
422
423 if (fbi->lq035_open_cnt <= 0) {
424 lq035q1_backlight(fbi, 0);
425 bfin_lq035q1_disable_ppi();
426 SSYNC();
427 disable_dma(CH_PPI);
428 bfin_lq035q1_stop_timers();
429 }
430
431 spin_unlock(&fbi->lock);
432
433 return 0;
434 }
435
436 static int bfin_lq035q1_fb_check_var(struct fb_var_screeninfo *var,
437 struct fb_info *info)
438 {
439 struct bfin_lq035q1fb_info *fbi = info->par;
440
441 if (var->bits_per_pixel == fbi->lcd_bpp) {
442 var->red.offset = info->var.red.offset;
443 var->green.offset = info->var.green.offset;
444 var->blue.offset = info->var.blue.offset;
445 var->red.length = info->var.red.length;
446 var->green.length = info->var.green.length;
447 var->blue.length = info->var.blue.length;
448 var->transp.offset = 0;
449 var->transp.length = 0;
450 var->transp.msb_right = 0;
451 var->red.msb_right = 0;
452 var->green.msb_right = 0;
453 var->blue.msb_right = 0;
454 } else {
455 pr_debug("%s: depth not supported: %u BPP\n", __func__,
456 var->bits_per_pixel);
457 return -EINVAL;
458 }
459
460 if (info->var.xres != var->xres || info->var.yres != var->yres ||
461 info->var.xres_virtual != var->xres_virtual ||
462 info->var.yres_virtual != var->yres_virtual) {
463 pr_debug("%s: Resolution not supported: X%u x Y%u \n",
464 __func__, var->xres, var->yres);
465 return -EINVAL;
466 }
467
468 /*
469 * Memory limit
470 */
471
472 if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
473 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
474 __func__, var->yres_virtual);
475 return -ENOMEM;
476 }
477
478
479 return 0;
480 }
481
482 int bfin_lq035q1_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
483 {
484 if (nocursor)
485 return 0;
486 else
487 return -EINVAL; /* just to force soft_cursor() call */
488 }
489
490 static int bfin_lq035q1_fb_setcolreg(u_int regno, u_int red, u_int green,
491 u_int blue, u_int transp,
492 struct fb_info *info)
493 {
494 if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
495 return -EINVAL;
496
497 if (info->var.grayscale) {
498 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
499 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
500 }
501
502 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
503
504 u32 value;
505 /* Place color in the pseudopalette */
506 if (regno > 16)
507 return -EINVAL;
508
509 red >>= (16 - info->var.red.length);
510 green >>= (16 - info->var.green.length);
511 blue >>= (16 - info->var.blue.length);
512
513 value = (red << info->var.red.offset) |
514 (green << info->var.green.offset) |
515 (blue << info->var.blue.offset);
516 value &= 0xFFFFFF;
517
518 ((u32 *) (info->pseudo_palette))[regno] = value;
519
520 }
521
522 return 0;
523 }
524
525 static struct fb_ops bfin_lq035q1_fb_ops = {
526 .owner = THIS_MODULE,
527 .fb_open = bfin_lq035q1_fb_open,
528 .fb_release = bfin_lq035q1_fb_release,
529 .fb_check_var = bfin_lq035q1_fb_check_var,
530 .fb_fillrect = cfb_fillrect,
531 .fb_copyarea = cfb_copyarea,
532 .fb_imageblit = cfb_imageblit,
533 .fb_cursor = bfin_lq035q1_fb_cursor,
534 .fb_setcolreg = bfin_lq035q1_fb_setcolreg,
535 };
536
537 static irqreturn_t bfin_lq035q1_irq_error(int irq, void *dev_id)
538 {
539 /*struct bfin_lq035q1fb_info *info = (struct bfin_lq035q1fb_info *)dev_id;*/
540
541 u16 status = bfin_read_PPI_STATUS();
542 bfin_write_PPI_STATUS(-1);
543
544 if (status) {
545 bfin_lq035q1_disable_ppi();
546 disable_dma(CH_PPI);
547
548 /* start dma */
549 enable_dma(CH_PPI);
550 bfin_lq035q1_enable_ppi();
551 bfin_write_PPI_STATUS(-1);
552 }
553
554 return IRQ_HANDLED;
555 }
556
557 static int __devinit bfin_lq035q1_probe(struct platform_device *pdev)
558 {
559 struct bfin_lq035q1fb_info *info;
560 struct fb_info *fbinfo;
561 u32 active_video_mem_offset;
562 int ret;
563
564 ret = request_dma(CH_PPI, DRIVER_NAME"_CH_PPI");
565 if (ret < 0) {
566 dev_err(&pdev->dev, "PPI DMA unavailable\n");
567 goto out1;
568 }
569
570 fbinfo = framebuffer_alloc(sizeof(*info), &pdev->dev);
571 if (!fbinfo) {
572 ret = -ENOMEM;
573 goto out2;
574 }
575
576 info = fbinfo->par;
577 info->fb = fbinfo;
578 info->dev = &pdev->dev;
579
580 info->disp_info = pdev->dev.platform_data;
581
582 platform_set_drvdata(pdev, fbinfo);
583
584 ret = bfin_lq035q1_calc_timing(info);
585 if (ret < 0) {
586 dev_err(&pdev->dev, "Failed PPI Mode\n");
587 goto out3;
588 }
589
590 strcpy(fbinfo->fix.id, DRIVER_NAME);
591
592 fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
593 fbinfo->fix.type_aux = 0;
594 fbinfo->fix.xpanstep = 0;
595 fbinfo->fix.ypanstep = 0;
596 fbinfo->fix.ywrapstep = 0;
597 fbinfo->fix.accel = FB_ACCEL_NONE;
598 fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
599
600 fbinfo->var.nonstd = 0;
601 fbinfo->var.activate = FB_ACTIVATE_NOW;
602 fbinfo->var.height = -1;
603 fbinfo->var.width = -1;
604 fbinfo->var.accel_flags = 0;
605 fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
606
607 fbinfo->var.xres = LCD_X_RES;
608 fbinfo->var.xres_virtual = LCD_X_RES;
609 fbinfo->var.yres = LCD_Y_RES;
610 fbinfo->var.yres_virtual = LCD_Y_RES;
611 fbinfo->var.bits_per_pixel = info->lcd_bpp;
612
613 if (info->disp_info->mode & LQ035_BGR) {
614 if (info->lcd_bpp == 24) {
615 fbinfo->var.red.offset = 0;
616 fbinfo->var.green.offset = 8;
617 fbinfo->var.blue.offset = 16;
618 } else {
619 fbinfo->var.red.offset = 0;
620 fbinfo->var.green.offset = 5;
621 fbinfo->var.blue.offset = 11;
622 }
623 } else {
624 if (info->lcd_bpp == 24) {
625 fbinfo->var.red.offset = 16;
626 fbinfo->var.green.offset = 8;
627 fbinfo->var.blue.offset = 0;
628 } else {
629 fbinfo->var.red.offset = 11;
630 fbinfo->var.green.offset = 5;
631 fbinfo->var.blue.offset = 0;
632 }
633 }
634
635 fbinfo->var.transp.offset = 0;
636
637 if (info->lcd_bpp == 24) {
638 fbinfo->var.red.length = 8;
639 fbinfo->var.green.length = 8;
640 fbinfo->var.blue.length = 8;
641 } else {
642 fbinfo->var.red.length = 5;
643 fbinfo->var.green.length = 6;
644 fbinfo->var.blue.length = 5;
645 }
646
647 fbinfo->var.transp.length = 0;
648
649 active_video_mem_offset = ((U_LINE / 2) * LCD_X_RES * (info->lcd_bpp / 8));
650
651 fbinfo->fix.smem_len = LCD_X_RES * LCD_Y_RES * info->lcd_bpp / 8
652 + active_video_mem_offset;
653
654 fbinfo->fix.line_length = fbinfo->var.xres_virtual *
655 fbinfo->var.bits_per_pixel / 8;
656
657
658 fbinfo->fbops = &bfin_lq035q1_fb_ops;
659 fbinfo->flags = FBINFO_FLAG_DEFAULT;
660
661 info->fb_buffer =
662 dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
663 GFP_KERNEL);
664
665 if (NULL == info->fb_buffer) {
666 dev_err(&pdev->dev, "couldn't allocate dma buffer\n");
667 ret = -ENOMEM;
668 goto out3;
669 }
670
671 fbinfo->screen_base = (void *)info->fb_buffer + active_video_mem_offset;
672 fbinfo->fix.smem_start = (int)info->fb_buffer + active_video_mem_offset;
673
674 fbinfo->fbops = &bfin_lq035q1_fb_ops;
675
676 fbinfo->pseudo_palette = &info->pseudo_pal;
677
678 ret = fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0);
679 if (ret < 0) {
680 dev_err(&pdev->dev, "failed to allocate colormap (%d entries)\n",
681 BFIN_LCD_NBR_PALETTE_ENTRIES);
682 goto out4;
683 }
684
685 ret = bfin_lq035q1_request_ports(pdev,
686 info->disp_info->ppi_mode == USE_RGB565_16_BIT_PPI);
687 if (ret) {
688 dev_err(&pdev->dev, "couldn't request gpio port\n");
689 goto out6;
690 }
691
692 info->irq = platform_get_irq(pdev, 0);
693 if (info->irq < 0) {
694 ret = -EINVAL;
695 goto out7;
696 }
697
698 ret = request_irq(info->irq, bfin_lq035q1_irq_error, IRQF_DISABLED,
699 DRIVER_NAME" PPI ERROR", info);
700 if (ret < 0) {
701 dev_err(&pdev->dev, "unable to request PPI ERROR IRQ\n");
702 goto out7;
703 }
704
705 info->spidrv.driver.name = DRIVER_NAME"-spi";
706 info->spidrv.probe = lq035q1_spidev_probe;
707 info->spidrv.remove = __devexit_p(lq035q1_spidev_remove);
708 info->spidrv.shutdown = lq035q1_spidev_shutdown;
709 info->spidrv.suspend = lq035q1_spidev_suspend;
710 info->spidrv.resume = lq035q1_spidev_resume;
711
712 ret = spi_register_driver(&info->spidrv);
713 if (ret < 0) {
714 dev_err(&pdev->dev, "couldn't register SPI Interface\n");
715 goto out8;
716 }
717
718 if (info->disp_info->use_bl) {
719 ret = gpio_request(info->disp_info->gpio_bl, "LQ035 Backlight");
720
721 if (ret) {
722 dev_err(&pdev->dev, "failed to request GPIO %d\n",
723 info->disp_info->gpio_bl);
724 goto out9;
725 }
726 gpio_direction_output(info->disp_info->gpio_bl, 0);
727 }
728
729 ret = register_framebuffer(fbinfo);
730 if (ret < 0) {
731 dev_err(&pdev->dev, "unable to register framebuffer\n");
732 goto out10;
733 }
734
735 dev_info(&pdev->dev, "%dx%d %d-bit RGB FrameBuffer initialized\n",
736 LCD_X_RES, LCD_Y_RES, info->lcd_bpp);
737
738 return 0;
739
740 out10:
741 if (info->disp_info->use_bl)
742 gpio_free(info->disp_info->gpio_bl);
743 out9:
744 spi_unregister_driver(&info->spidrv);
745 out8:
746 free_irq(info->irq, info);
747 out7:
748 bfin_lq035q1_free_ports(info->disp_info->ppi_mode ==
749 USE_RGB565_16_BIT_PPI);
750 out6:
751 fb_dealloc_cmap(&fbinfo->cmap);
752 out4:
753 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
754 info->dma_handle);
755 out3:
756 framebuffer_release(fbinfo);
757 out2:
758 free_dma(CH_PPI);
759 out1:
760 platform_set_drvdata(pdev, NULL);
761
762 return ret;
763 }
764
765 static int __devexit bfin_lq035q1_remove(struct platform_device *pdev)
766 {
767 struct fb_info *fbinfo = platform_get_drvdata(pdev);
768 struct bfin_lq035q1fb_info *info = fbinfo->par;
769
770 if (info->disp_info->use_bl)
771 gpio_free(info->disp_info->gpio_bl);
772
773 spi_unregister_driver(&info->spidrv);
774
775 unregister_framebuffer(fbinfo);
776
777 free_dma(CH_PPI);
778 free_irq(info->irq, info);
779
780 if (info->fb_buffer != NULL)
781 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
782 info->dma_handle);
783
784 fb_dealloc_cmap(&fbinfo->cmap);
785
786 bfin_lq035q1_free_ports(info->disp_info->ppi_mode ==
787 USE_RGB565_16_BIT_PPI);
788
789 platform_set_drvdata(pdev, NULL);
790 framebuffer_release(fbinfo);
791
792 dev_info(&pdev->dev, "unregistered LCD driver\n");
793
794 return 0;
795 }
796
797 #ifdef CONFIG_PM
798 static int bfin_lq035q1_suspend(struct device *dev)
799 {
800 struct fb_info *fbinfo = dev_get_drvdata(dev);
801 struct bfin_lq035q1fb_info *info = fbinfo->par;
802
803 if (info->lq035_open_cnt) {
804 lq035q1_backlight(info, 0);
805 bfin_lq035q1_disable_ppi();
806 SSYNC();
807 disable_dma(CH_PPI);
808 bfin_lq035q1_stop_timers();
809 bfin_write_PPI_STATUS(-1);
810 }
811
812 return 0;
813 }
814
815 static int bfin_lq035q1_resume(struct device *dev)
816 {
817 struct fb_info *fbinfo = dev_get_drvdata(dev);
818 struct bfin_lq035q1fb_info *info = fbinfo->par;
819
820 if (info->lq035_open_cnt) {
821 bfin_lq035q1_disable_ppi();
822 SSYNC();
823
824 bfin_lq035q1_config_dma(info);
825 bfin_lq035q1_config_ppi(info);
826 bfin_lq035q1_init_timers(info);
827
828 /* start dma */
829 enable_dma(CH_PPI);
830 bfin_lq035q1_enable_ppi();
831 bfin_lq035q1_start_timers();
832 lq035q1_backlight(info, 1);
833 }
834
835 return 0;
836 }
837
838 static struct dev_pm_ops bfin_lq035q1_dev_pm_ops = {
839 .suspend = bfin_lq035q1_suspend,
840 .resume = bfin_lq035q1_resume,
841 };
842 #endif
843
844 static struct platform_driver bfin_lq035q1_driver = {
845 .probe = bfin_lq035q1_probe,
846 .remove = __devexit_p(bfin_lq035q1_remove),
847 .driver = {
848 .name = DRIVER_NAME,
849 #ifdef CONFIG_PM
850 .pm = &bfin_lq035q1_dev_pm_ops,
851 #endif
852 },
853 };
854
855 static int __init bfin_lq035q1_driver_init(void)
856 {
857 return platform_driver_register(&bfin_lq035q1_driver);
858 }
859 module_init(bfin_lq035q1_driver_init);
860
861 static void __exit bfin_lq035q1_driver_cleanup(void)
862 {
863 platform_driver_unregister(&bfin_lq035q1_driver);
864 }
865 module_exit(bfin_lq035q1_driver_cleanup);
866
867 MODULE_DESCRIPTION("Blackfin TFT LCD Driver");
868 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree