include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[safe/jmp/linux-2.6] / drivers / video / bfin-lq035q1-fb.c
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
65 #define USE_RGB565_16_BIT_PPI
66
67 #ifdef USE_RGB565_16_BIT_PPI
68 #define LCD_BPP         16      /* Bit Per Pixel */
69 #define CLOCKS_PER_PIX  1
70 #define CPLD_PIPELINE_DELAY_COR 0       /* NO CPLB */
71 #endif
72
73 /* Interface 16/18-bit TFT over an 8-bit wide PPI using a small Programmable Logic Device (CPLD)
74  * http://blackfin.uclinux.org/gf/project/stamp/frs/?action=FrsReleaseBrowse&frs_package_id=165
75  */
76
77 #ifdef USE_RGB565_8_BIT_PPI
78 #define LCD_BPP         16      /* Bit Per Pixel */
79 #define CLOCKS_PER_PIX  2
80 #define CPLD_PIPELINE_DELAY_COR 3       /* RGB565 */
81 #endif
82
83 #ifdef USE_RGB888_8_BIT_PPI
84 #define LCD_BPP         24      /* Bit Per Pixel */
85 #define CLOCKS_PER_PIX  3
86 #define CPLD_PIPELINE_DELAY_COR 5       /* RGB888 */
87 #endif
88
89         /*
90          * HS and VS timing parameters (all in number of PPI clk ticks)
91          */
92
93 #define U_LINE          4                               /* Blanking Lines */
94
95 #define H_ACTPIX        (LCD_X_RES * CLOCKS_PER_PIX)    /* active horizontal pixel */
96 #define H_PERIOD        (336 * CLOCKS_PER_PIX)          /* HS period */
97 #define H_PULSE         (2 * CLOCKS_PER_PIX)                            /* HS pulse width */
98 #define H_START         (7 * CLOCKS_PER_PIX + CPLD_PIPELINE_DELAY_COR)  /* first valid pixel */
99
100 #define V_LINES         (LCD_Y_RES + U_LINE)            /* total vertical lines */
101 #define V_PULSE         (2 * CLOCKS_PER_PIX)            /* VS pulse width (1-5 H_PERIODs) */
102 #define V_PERIOD        (H_PERIOD * V_LINES)            /* VS period */
103
104 #define ACTIVE_VIDEO_MEM_OFFSET         ((U_LINE / 2) * LCD_X_RES * (LCD_BPP / 8))
105
106 #define BFIN_LCD_NBR_PALETTE_ENTRIES    256
107
108 #define PPI_TX_MODE                     0x2
109 #define PPI_XFER_TYPE_11                0xC
110 #define PPI_PORT_CFG_01                 0x10
111 #define PPI_POLS_1                      0x8000
112
113 #if (CLOCKS_PER_PIX > 1)
114 #define PPI_PMODE (DLEN_8 | PACK_EN)
115 #else
116 #define PPI_PMODE (DLEN_16)
117 #endif
118
119 #define LQ035_INDEX                     0x74
120 #define LQ035_DATA                      0x76
121
122 #define LQ035_DRIVER_OUTPUT_CTL         0x1
123 #define LQ035_SHUT_CTL                  0x11
124
125 #define LQ035_DRIVER_OUTPUT_MASK        (LQ035_LR | LQ035_TB | LQ035_BGR | LQ035_REV)
126 #define LQ035_DRIVER_OUTPUT_DEFAULT     (0x2AEF & ~LQ035_DRIVER_OUTPUT_MASK)
127
128 #define LQ035_SHUT                      (1 << 0)        /* Shutdown */
129 #define LQ035_ON                        (0 << 0)        /* Shutdown */
130
131 struct bfin_lq035q1fb_info {
132         struct fb_info *fb;
133         struct device *dev;
134         struct spi_driver spidrv;
135         struct bfin_lq035q1fb_disp_info *disp_info;
136         unsigned char *fb_buffer;       /* RGB Buffer */
137         dma_addr_t dma_handle;
138         int lq035_open_cnt;
139         int irq;
140         spinlock_t lock;        /* lock */
141         u32 pseudo_pal[16];
142 };
143
144 static int nocursor;
145 module_param(nocursor, int, 0644);
146 MODULE_PARM_DESC(nocursor, "cursor enable/disable");
147
148 struct spi_control {
149         unsigned short mode;
150 };
151
152 static int lq035q1_control(struct spi_device *spi, unsigned char reg, unsigned short value)
153 {
154         int ret;
155         u8 regs[3] = { LQ035_INDEX, 0, 0 };
156         u8 dat[3] = { LQ035_DATA, 0, 0 };
157
158         if (!spi)
159                 return -ENODEV;
160
161         regs[2] = reg;
162         dat[1] = value >> 8;
163         dat[2] = value & 0xFF;
164
165         ret = spi_write(spi, regs, ARRAY_SIZE(regs));
166         ret |= spi_write(spi, dat, ARRAY_SIZE(dat));
167         return ret;
168 }
169
170 static int __devinit lq035q1_spidev_probe(struct spi_device *spi)
171 {
172         int ret;
173         struct spi_control *ctl;
174         struct bfin_lq035q1fb_info *info = container_of(spi->dev.driver,
175                                                 struct bfin_lq035q1fb_info,
176                                                 spidrv.driver);
177
178         ctl = kzalloc(sizeof(*ctl), GFP_KERNEL);
179
180         if (!ctl)
181                 return -ENOMEM;
182
183         ctl->mode = (info->disp_info->mode &
184                 LQ035_DRIVER_OUTPUT_MASK) | LQ035_DRIVER_OUTPUT_DEFAULT;
185
186         ret = lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_ON);
187         ret |= lq035q1_control(spi, LQ035_DRIVER_OUTPUT_CTL, ctl->mode);
188         if (ret)
189                 return ret;
190
191         spi_set_drvdata(spi, ctl);
192
193         return 0;
194 }
195
196 static int lq035q1_spidev_remove(struct spi_device *spi)
197 {
198         return lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_SHUT);
199 }
200
201 #ifdef CONFIG_PM
202 static int lq035q1_spidev_suspend(struct spi_device *spi, pm_message_t state)
203 {
204         return lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_SHUT);
205 }
206
207 static int lq035q1_spidev_resume(struct spi_device *spi)
208 {
209         int ret;
210         struct spi_control *ctl = spi_get_drvdata(spi);
211
212         ret = lq035q1_control(spi, LQ035_DRIVER_OUTPUT_CTL, ctl->mode);
213         if (ret)
214                 return ret;
215
216         return lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_ON);
217 }
218 #else
219 # define lq035q1_spidev_suspend NULL
220 # define lq035q1_spidev_resume  NULL
221 #endif
222
223 /* Power down all displays on reboot, poweroff or halt */
224 static void lq035q1_spidev_shutdown(struct spi_device *spi)
225 {
226         lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_SHUT);
227 }
228
229 static int lq035q1_backlight(struct bfin_lq035q1fb_info *info, unsigned arg)
230 {
231         if (info->disp_info->use_bl)
232                 gpio_set_value(info->disp_info->gpio_bl, arg);
233
234         return 0;
235 }
236
237 static void bfin_lq035q1_config_ppi(struct bfin_lq035q1fb_info *fbi)
238 {
239         bfin_write_PPI_DELAY(H_START);
240         bfin_write_PPI_COUNT(H_ACTPIX - 1);
241         bfin_write_PPI_FRAME(V_LINES);
242
243         bfin_write_PPI_CONTROL(PPI_TX_MODE |       /* output mode , PORT_DIR */
244                                 PPI_XFER_TYPE_11 | /* sync mode XFR_TYPE */
245                                 PPI_PORT_CFG_01 |  /* two frame sync PORT_CFG */
246                                 PPI_PMODE |        /* 8/16 bit data length / PACK_EN? */
247                                 PPI_POLS_1);       /* faling edge syncs POLS */
248 }
249
250 static inline void bfin_lq035q1_disable_ppi(void)
251 {
252         bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() & ~PORT_EN);
253 }
254
255 static inline void bfin_lq035q1_enable_ppi(void)
256 {
257         bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
258 }
259
260 static void bfin_lq035q1_start_timers(void)
261 {
262         enable_gptimers(TIMER_VSYNCbit | TIMER_HSYNCbit);
263 }
264
265 static void bfin_lq035q1_stop_timers(void)
266 {
267         disable_gptimers(TIMER_HSYNCbit | TIMER_VSYNCbit);
268
269         set_gptimer_status(0, TIMER_HSYNC_STATUS_TRUN | TIMER_VSYNC_STATUS_TRUN |
270                                 TIMER_HSYNC_STATUS_TIMIL | TIMER_VSYNC_STATUS_TIMIL |
271                                  TIMER_HSYNC_STATUS_TOVF | TIMER_VSYNC_STATUS_TOVF);
272
273 }
274
275 static void bfin_lq035q1_init_timers(void)
276 {
277
278         bfin_lq035q1_stop_timers();
279
280         set_gptimer_period(TIMER_HSYNC_id, H_PERIOD);
281         set_gptimer_pwidth(TIMER_HSYNC_id, H_PULSE);
282         set_gptimer_config(TIMER_HSYNC_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
283                                       TIMER_TIN_SEL | TIMER_CLK_SEL|
284                                       TIMER_EMU_RUN);
285
286         set_gptimer_period(TIMER_VSYNC_id, V_PERIOD);
287         set_gptimer_pwidth(TIMER_VSYNC_id, V_PULSE);
288         set_gptimer_config(TIMER_VSYNC_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
289                                       TIMER_TIN_SEL | TIMER_CLK_SEL |
290                                       TIMER_EMU_RUN);
291
292 }
293
294 static void bfin_lq035q1_config_dma(struct bfin_lq035q1fb_info *fbi)
295 {
296
297         set_dma_config(CH_PPI,
298                        set_bfin_dma_config(DIR_READ, DMA_FLOW_AUTO,
299                                            INTR_DISABLE, DIMENSION_2D,
300                                            DATA_SIZE_16,
301                                            DMA_NOSYNC_KEEP_DMA_BUF));
302         set_dma_x_count(CH_PPI, (LCD_X_RES * LCD_BPP) / DMA_BUS_SIZE);
303         set_dma_x_modify(CH_PPI, DMA_BUS_SIZE / 8);
304         set_dma_y_count(CH_PPI, V_LINES);
305
306         set_dma_y_modify(CH_PPI, DMA_BUS_SIZE / 8);
307         set_dma_start_addr(CH_PPI, (unsigned long)fbi->fb_buffer);
308
309 }
310
311 #if (CLOCKS_PER_PIX == 1)
312 static const u16 ppi0_req_16[] = {P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2,
313                             P_PPI0_D0, P_PPI0_D1, P_PPI0_D2,
314                             P_PPI0_D3, P_PPI0_D4, P_PPI0_D5,
315                             P_PPI0_D6, P_PPI0_D7, P_PPI0_D8,
316                             P_PPI0_D9, P_PPI0_D10, P_PPI0_D11,
317                             P_PPI0_D12, P_PPI0_D13, P_PPI0_D14,
318                             P_PPI0_D15, 0};
319 #else
320 static const u16 ppi0_req_16[] = {P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2,
321                             P_PPI0_D0, P_PPI0_D1, P_PPI0_D2,
322                             P_PPI0_D3, P_PPI0_D4, P_PPI0_D5,
323                             P_PPI0_D6, P_PPI0_D7, 0};
324 #endif
325
326 static inline void bfin_lq035q1_free_ports(void)
327 {
328         peripheral_free_list(ppi0_req_16);
329         if (ANOMALY_05000400)
330                 gpio_free(P_IDENT(P_PPI0_FS3));
331 }
332
333 static int __devinit bfin_lq035q1_request_ports(struct platform_device *pdev)
334 {
335         /* ANOMALY_05000400 - PPI Does Not Start Properly In Specific Mode:
336          * Drive PPI_FS3 Low
337          */
338         if (ANOMALY_05000400) {
339                 int ret = gpio_request(P_IDENT(P_PPI0_FS3), "PPI_FS3");
340                 if (ret)
341                         return ret;
342                 gpio_direction_output(P_IDENT(P_PPI0_FS3), 0);
343         }
344
345         if (peripheral_request_list(ppi0_req_16, DRIVER_NAME)) {
346                 dev_err(&pdev->dev, "requesting peripherals failed\n");
347                 return -EFAULT;
348         }
349
350         return 0;
351 }
352
353 static int bfin_lq035q1_fb_open(struct fb_info *info, int user)
354 {
355         struct bfin_lq035q1fb_info *fbi = info->par;
356
357         spin_lock(&fbi->lock);
358         fbi->lq035_open_cnt++;
359
360         if (fbi->lq035_open_cnt <= 1) {
361
362                 bfin_lq035q1_disable_ppi();
363                 SSYNC();
364
365                 bfin_lq035q1_config_dma(fbi);
366                 bfin_lq035q1_config_ppi(fbi);
367                 bfin_lq035q1_init_timers();
368
369                 /* start dma */
370                 enable_dma(CH_PPI);
371                 bfin_lq035q1_enable_ppi();
372                 bfin_lq035q1_start_timers();
373                 lq035q1_backlight(fbi, 1);
374         }
375
376         spin_unlock(&fbi->lock);
377
378         return 0;
379 }
380
381 static int bfin_lq035q1_fb_release(struct fb_info *info, int user)
382 {
383         struct bfin_lq035q1fb_info *fbi = info->par;
384
385         spin_lock(&fbi->lock);
386
387         fbi->lq035_open_cnt--;
388
389         if (fbi->lq035_open_cnt <= 0) {
390                 lq035q1_backlight(fbi, 0);
391                 bfin_lq035q1_disable_ppi();
392                 SSYNC();
393                 disable_dma(CH_PPI);
394                 bfin_lq035q1_stop_timers();
395         }
396
397         spin_unlock(&fbi->lock);
398
399         return 0;
400 }
401
402 static int bfin_lq035q1_fb_check_var(struct fb_var_screeninfo *var,
403                                      struct fb_info *info)
404 {
405         switch (var->bits_per_pixel) {
406 #if (LCD_BPP == 24)
407         case 24:/* TRUECOLOUR, 16m */
408 #else
409         case 16:/* DIRECTCOLOUR, 64k */
410 #endif
411                 var->red.offset = info->var.red.offset;
412                 var->green.offset = info->var.green.offset;
413                 var->blue.offset = info->var.blue.offset;
414                 var->red.length = info->var.red.length;
415                 var->green.length = info->var.green.length;
416                 var->blue.length = info->var.blue.length;
417                 var->transp.offset = 0;
418                 var->transp.length = 0;
419                 var->transp.msb_right = 0;
420                 var->red.msb_right = 0;
421                 var->green.msb_right = 0;
422                 var->blue.msb_right = 0;
423                 break;
424         default:
425                 pr_debug("%s: depth not supported: %u BPP\n", __func__,
426                          var->bits_per_pixel);
427                 return -EINVAL;
428         }
429
430         if (info->var.xres != var->xres || info->var.yres != var->yres ||
431             info->var.xres_virtual != var->xres_virtual ||
432             info->var.yres_virtual != var->yres_virtual) {
433                 pr_debug("%s: Resolution not supported: X%u x Y%u \n",
434                          __func__, var->xres, var->yres);
435                 return -EINVAL;
436         }
437
438         /*
439          *  Memory limit
440          */
441
442         if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
443                 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
444                          __func__, var->yres_virtual);
445                 return -ENOMEM;
446         }
447
448
449         return 0;
450 }
451
452 int bfin_lq035q1_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
453 {
454         if (nocursor)
455                 return 0;
456         else
457                 return -EINVAL; /* just to force soft_cursor() call */
458 }
459
460 static int bfin_lq035q1_fb_setcolreg(u_int regno, u_int red, u_int green,
461                                    u_int blue, u_int transp,
462                                    struct fb_info *info)
463 {
464         if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
465                 return -EINVAL;
466
467         if (info->var.grayscale) {
468                 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
469                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
470         }
471
472         if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
473
474                 u32 value;
475                 /* Place color in the pseudopalette */
476                 if (regno > 16)
477                         return -EINVAL;
478
479                 red >>= (16 - info->var.red.length);
480                 green >>= (16 - info->var.green.length);
481                 blue >>= (16 - info->var.blue.length);
482
483                 value = (red << info->var.red.offset) |
484                     (green << info->var.green.offset) |
485                     (blue << info->var.blue.offset);
486                 value &= 0xFFFFFF;
487
488                 ((u32 *) (info->pseudo_palette))[regno] = value;
489
490         }
491
492         return 0;
493 }
494
495 static struct fb_ops bfin_lq035q1_fb_ops = {
496         .owner = THIS_MODULE,
497         .fb_open = bfin_lq035q1_fb_open,
498         .fb_release = bfin_lq035q1_fb_release,
499         .fb_check_var = bfin_lq035q1_fb_check_var,
500         .fb_fillrect = cfb_fillrect,
501         .fb_copyarea = cfb_copyarea,
502         .fb_imageblit = cfb_imageblit,
503         .fb_cursor = bfin_lq035q1_fb_cursor,
504         .fb_setcolreg = bfin_lq035q1_fb_setcolreg,
505 };
506
507 static irqreturn_t bfin_lq035q1_irq_error(int irq, void *dev_id)
508 {
509         /*struct bfin_lq035q1fb_info *info = (struct bfin_lq035q1fb_info *)dev_id;*/
510
511         u16 status = bfin_read_PPI_STATUS();
512         bfin_write_PPI_STATUS(-1);
513
514         if (status) {
515                 bfin_lq035q1_disable_ppi();
516                 disable_dma(CH_PPI);
517
518                 /* start dma */
519                 enable_dma(CH_PPI);
520                 bfin_lq035q1_enable_ppi();
521                 bfin_write_PPI_STATUS(-1);
522         }
523
524         return IRQ_HANDLED;
525 }
526
527 static int __devinit bfin_lq035q1_probe(struct platform_device *pdev)
528 {
529         struct bfin_lq035q1fb_info *info;
530         struct fb_info *fbinfo;
531         int ret;
532
533         ret = request_dma(CH_PPI, DRIVER_NAME"_CH_PPI");
534         if (ret < 0) {
535                 dev_err(&pdev->dev, "PPI DMA unavailable\n");
536                 goto out1;
537         }
538
539         fbinfo = framebuffer_alloc(sizeof(*info), &pdev->dev);
540         if (!fbinfo) {
541                 ret = -ENOMEM;
542                 goto out2;
543         }
544
545         info = fbinfo->par;
546         info->fb = fbinfo;
547         info->dev = &pdev->dev;
548
549         info->disp_info = pdev->dev.platform_data;
550
551         platform_set_drvdata(pdev, fbinfo);
552
553         strcpy(fbinfo->fix.id, DRIVER_NAME);
554
555         fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
556         fbinfo->fix.type_aux = 0;
557         fbinfo->fix.xpanstep = 0;
558         fbinfo->fix.ypanstep = 0;
559         fbinfo->fix.ywrapstep = 0;
560         fbinfo->fix.accel = FB_ACCEL_NONE;
561         fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
562
563         fbinfo->var.nonstd = 0;
564         fbinfo->var.activate = FB_ACTIVATE_NOW;
565         fbinfo->var.height = -1;
566         fbinfo->var.width = -1;
567         fbinfo->var.accel_flags = 0;
568         fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
569
570         fbinfo->var.xres = LCD_X_RES;
571         fbinfo->var.xres_virtual = LCD_X_RES;
572         fbinfo->var.yres = LCD_Y_RES;
573         fbinfo->var.yres_virtual = LCD_Y_RES;
574         fbinfo->var.bits_per_pixel = LCD_BPP;
575
576         if (info->disp_info->mode & LQ035_BGR) {
577 #if (LCD_BPP == 24)
578                 fbinfo->var.red.offset = 0;
579                 fbinfo->var.green.offset = 8;
580                 fbinfo->var.blue.offset = 16;
581 #else
582                 fbinfo->var.red.offset = 0;
583                 fbinfo->var.green.offset = 5;
584                 fbinfo->var.blue.offset = 11;
585 #endif
586         } else {
587 #if (LCD_BPP == 24)
588                 fbinfo->var.red.offset = 16;
589                 fbinfo->var.green.offset = 8;
590                 fbinfo->var.blue.offset = 0;
591 #else
592                 fbinfo->var.red.offset = 11;
593                 fbinfo->var.green.offset = 5;
594                 fbinfo->var.blue.offset = 0;
595 #endif
596         }
597
598         fbinfo->var.transp.offset = 0;
599
600 #if (LCD_BPP == 24)
601         fbinfo->var.red.length = 8;
602         fbinfo->var.green.length = 8;
603         fbinfo->var.blue.length = 8;
604 #else
605         fbinfo->var.red.length = 5;
606         fbinfo->var.green.length = 6;
607         fbinfo->var.blue.length = 5;
608 #endif
609
610         fbinfo->var.transp.length = 0;
611
612         fbinfo->fix.smem_len = LCD_X_RES * LCD_Y_RES * LCD_BPP / 8
613                                 + ACTIVE_VIDEO_MEM_OFFSET;
614
615         fbinfo->fix.line_length = fbinfo->var.xres_virtual *
616             fbinfo->var.bits_per_pixel / 8;
617
618
619         fbinfo->fbops = &bfin_lq035q1_fb_ops;
620         fbinfo->flags = FBINFO_FLAG_DEFAULT;
621
622         info->fb_buffer =
623             dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
624                                GFP_KERNEL);
625
626         if (NULL == info->fb_buffer) {
627                 dev_err(&pdev->dev, "couldn't allocate dma buffer\n");
628                 ret = -ENOMEM;
629                 goto out3;
630         }
631
632         fbinfo->screen_base = (void *)info->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET;
633         fbinfo->fix.smem_start = (int)info->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET;
634
635         fbinfo->fbops = &bfin_lq035q1_fb_ops;
636
637         fbinfo->pseudo_palette = &info->pseudo_pal;
638
639         ret = fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0);
640         if (ret < 0) {
641                 dev_err(&pdev->dev, "failed to allocate colormap (%d entries)\n",
642                        BFIN_LCD_NBR_PALETTE_ENTRIES);
643                 goto out4;
644         }
645
646         ret = bfin_lq035q1_request_ports(pdev);
647         if (ret) {
648                 dev_err(&pdev->dev, "couldn't request gpio port\n");
649                 goto out6;
650         }
651
652         info->irq = platform_get_irq(pdev, 0);
653         if (info->irq < 0) {
654                 ret = -EINVAL;
655                 goto out7;
656         }
657
658         ret = request_irq(info->irq, bfin_lq035q1_irq_error, IRQF_DISABLED,
659                         DRIVER_NAME" PPI ERROR", info);
660         if (ret < 0) {
661                 dev_err(&pdev->dev, "unable to request PPI ERROR IRQ\n");
662                 goto out7;
663         }
664
665         info->spidrv.driver.name = DRIVER_NAME"-spi";
666         info->spidrv.probe    = lq035q1_spidev_probe;
667         info->spidrv.remove   = __devexit_p(lq035q1_spidev_remove);
668         info->spidrv.shutdown = lq035q1_spidev_shutdown;
669         info->spidrv.suspend  = lq035q1_spidev_suspend;
670         info->spidrv.resume   = lq035q1_spidev_resume;
671
672         ret = spi_register_driver(&info->spidrv);
673         if (ret < 0) {
674                 dev_err(&pdev->dev, "couldn't register SPI Interface\n");
675                 goto out8;
676         }
677
678         if (info->disp_info->use_bl) {
679                 ret = gpio_request(info->disp_info->gpio_bl, "LQ035 Backlight");
680
681                 if (ret) {
682                         dev_err(&pdev->dev, "failed to request GPIO %d\n",
683                                 info->disp_info->gpio_bl);
684                         goto out9;
685                 }
686                 gpio_direction_output(info->disp_info->gpio_bl, 0);
687         }
688
689         ret = register_framebuffer(fbinfo);
690         if (ret < 0) {
691                 dev_err(&pdev->dev, "unable to register framebuffer\n");
692                 goto out10;
693         }
694
695         dev_info(&pdev->dev, "%dx%d %d-bit RGB FrameBuffer initialized\n",
696                 LCD_X_RES, LCD_Y_RES, LCD_BPP);
697
698         return 0;
699
700  out10:
701         if (info->disp_info->use_bl)
702                 gpio_free(info->disp_info->gpio_bl);
703  out9:
704         spi_unregister_driver(&info->spidrv);
705  out8:
706         free_irq(info->irq, info);
707  out7:
708         bfin_lq035q1_free_ports();
709  out6:
710         fb_dealloc_cmap(&fbinfo->cmap);
711  out4:
712         dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
713                           info->dma_handle);
714  out3:
715         framebuffer_release(fbinfo);
716  out2:
717         free_dma(CH_PPI);
718  out1:
719         platform_set_drvdata(pdev, NULL);
720
721         return ret;
722 }
723
724 static int __devexit bfin_lq035q1_remove(struct platform_device *pdev)
725 {
726         struct fb_info *fbinfo = platform_get_drvdata(pdev);
727         struct bfin_lq035q1fb_info *info = fbinfo->par;
728
729         if (info->disp_info->use_bl)
730                 gpio_free(info->disp_info->gpio_bl);
731
732         spi_unregister_driver(&info->spidrv);
733
734         unregister_framebuffer(fbinfo);
735
736         free_dma(CH_PPI);
737         free_irq(info->irq, info);
738
739         if (info->fb_buffer != NULL)
740                 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
741                                   info->dma_handle);
742
743         fb_dealloc_cmap(&fbinfo->cmap);
744
745         bfin_lq035q1_free_ports();
746
747         platform_set_drvdata(pdev, NULL);
748         framebuffer_release(fbinfo);
749
750         dev_info(&pdev->dev, "unregistered LCD driver\n");
751
752         return 0;
753 }
754
755 #ifdef CONFIG_PM
756 static int bfin_lq035q1_suspend(struct device *dev)
757 {
758         struct fb_info *fbinfo = dev_get_drvdata(dev);
759         struct bfin_lq035q1fb_info *info = fbinfo->par;
760
761         if (info->lq035_open_cnt) {
762                 lq035q1_backlight(info, 0);
763                 bfin_lq035q1_disable_ppi();
764                 SSYNC();
765                 disable_dma(CH_PPI);
766                 bfin_lq035q1_stop_timers();
767                 bfin_write_PPI_STATUS(-1);
768         }
769
770         return 0;
771 }
772
773 static int bfin_lq035q1_resume(struct device *dev)
774 {
775         struct fb_info *fbinfo = dev_get_drvdata(dev);
776         struct bfin_lq035q1fb_info *info = fbinfo->par;
777
778         if (info->lq035_open_cnt) {
779                 bfin_lq035q1_disable_ppi();
780                 SSYNC();
781
782                 bfin_lq035q1_config_dma(info);
783                 bfin_lq035q1_config_ppi(info);
784                 bfin_lq035q1_init_timers();
785
786                 /* start dma */
787                 enable_dma(CH_PPI);
788                 bfin_lq035q1_enable_ppi();
789                 bfin_lq035q1_start_timers();
790                 lq035q1_backlight(info, 1);
791         }
792
793         return 0;
794 }
795
796 static struct dev_pm_ops bfin_lq035q1_dev_pm_ops = {
797         .suspend = bfin_lq035q1_suspend,
798         .resume  = bfin_lq035q1_resume,
799 };
800 #endif
801
802 static struct platform_driver bfin_lq035q1_driver = {
803         .probe   = bfin_lq035q1_probe,
804         .remove  = __devexit_p(bfin_lq035q1_remove),
805         .driver = {
806                 .name = DRIVER_NAME,
807 #ifdef CONFIG_PM
808                 .pm   = &bfin_lq035q1_dev_pm_ops,
809 #endif
810         },
811 };
812
813 static int __init bfin_lq035q1_driver_init(void)
814 {
815         return platform_driver_register(&bfin_lq035q1_driver);
816 }
817 module_init(bfin_lq035q1_driver_init);
818
819 static void __exit bfin_lq035q1_driver_cleanup(void)
820 {
821         platform_driver_unregister(&bfin_lq035q1_driver);
822 }
823 module_exit(bfin_lq035q1_driver_cleanup);
824
825 MODULE_DESCRIPTION("Blackfin TFT LCD Driver");
826 MODULE_LICENSE("GPL");