1 /*
2 * File: drivers/video/bf54x-lq043.c
3 * Based on:
4 * Author: Michael Hennerich <hennerich@blackfin.uclinux.org>
5 *
6 * Created:
7 * Description: ADSP-BF54x Framebufer driver
8 *
9 *
10 * Modified:
11 * Copyright 2007-2008 Analog Devices Inc.
12 *
13 * Bugs: Enter bugs at http://blackfin.uclinux.org/
14 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, see the file COPYING, or write
27 * to the Free Software Foundation, Inc.,
28 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
29 */
30
31 #include <linux/module.h>
32 #include <linux/kernel.h>
33 #include <linux/errno.h>
34 #include <linux/string.h>
35 #include <linux/mm.h>
36 #include <linux/tty.h>
37 #include <linux/slab.h>
38 #include <linux/delay.h>
39 #include <linux/fb.h>
40 #include <linux/ioport.h>
41 #include <linux/init.h>
42 #include <linux/types.h>
43 #include <linux/interrupt.h>
44 #include <linux/sched.h>
45 #include <linux/timer.h>
46 #include <linux/device.h>
47 #include <linux/backlight.h>
48 #include <linux/lcd.h>
49 #include <linux/spinlock.h>
50 #include <linux/dma-mapping.h>
51 #include <linux/platform_device.h>
52
53 #include <asm/blackfin.h>
54 #include <asm/irq.h>
55 #include <asm/dpmc.h>
56 #include <asm/dma-mapping.h>
57 #include <asm/dma.h>
58 #include <asm/gpio.h>
59 #include <asm/portmux.h>
60
61 #include <mach/bf54x-lq043.h>
62
63 #define NO_BL_SUPPORT
64
65 #define DRIVER_NAME "bf54x-lq043"
66 static char driver_name[] = DRIVER_NAME;
67
68 #define BFIN_LCD_NBR_PALETTE_ENTRIES 256
69
70 #define EPPI0_18 {P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2, P_PPI0_D0, P_PPI0_D1, P_PPI0_D2, P_PPI0_D3, \
71 P_PPI0_D4, P_PPI0_D5, P_PPI0_D6, P_PPI0_D7, P_PPI0_D8, P_PPI0_D9, P_PPI0_D10, \
72 P_PPI0_D11, P_PPI0_D12, P_PPI0_D13, P_PPI0_D14, P_PPI0_D15, P_PPI0_D16, P_PPI0_D17, 0}
73
74 #define EPPI0_24 {P_PPI0_D18, P_PPI0_D19, P_PPI0_D20, P_PPI0_D21, P_PPI0_D22, P_PPI0_D23, 0}
75
76 struct bfin_bf54xfb_info {
77 struct fb_info *fb;
78 struct device *dev;
79
80 struct bfin_bf54xfb_mach_info *mach_info;
81
82 unsigned char *fb_buffer; /* RGB Buffer */
83
84 dma_addr_t dma_handle;
85 int lq043_mmap;
86 int lq043_open_cnt;
87 int irq;
88 spinlock_t lock; /* lock */
89 };
90
91 static int nocursor;
92 module_param(nocursor, int, 0644);
93 MODULE_PARM_DESC(nocursor, "cursor enable/disable");
94
95 static int outp_rgb666;
96 module_param(outp_rgb666, int, 0);
97 MODULE_PARM_DESC(outp_rgb666, "Output 18-bit RGB666");
98
99 #define LCD_X_RES 480 /*Horizontal Resolution */
100 #define LCD_Y_RES 272 /* Vertical Resolution */
101
102 #define LCD_BPP 24 /* Bit Per Pixel */
103 #define DMA_BUS_SIZE 32
104
105 /* -- Horizontal synchronizing --
106 *
107 * Timing characteristics taken from the SHARP LQ043T1DG01 datasheet
108 * (LCY-W-06602A Page 9 of 22)
109 *
110 * Clock Frequency 1/Tc Min 7.83 Typ 9.00 Max 9.26 MHz
111 *
112 * Period TH - 525 - Clock
113 * Pulse width THp - 41 - Clock
114 * Horizontal period THd - 480 - Clock
115 * Back porch THb - 2 - Clock
116 * Front porch THf - 2 - Clock
117 *
118 * -- Vertical synchronizing --
119 * Period TV - 286 - Line
120 * Pulse width TVp - 10 - Line
121 * Vertical period TVd - 272 - Line
122 * Back porch TVb - 2 - Line
123 * Front porch TVf - 2 - Line
124 */
125
126 #define LCD_CLK (8*1000*1000) /* 8MHz */
127
128 /* # active data to transfer after Horizontal Delay clock */
129 #define EPPI_HCOUNT LCD_X_RES
130
131 /* # active lines to transfer after Vertical Delay clock */
132 #define EPPI_VCOUNT LCD_Y_RES
133
134 /* Samples per Line = 480 (active data) + 45 (padding) */
135 #define EPPI_LINE 525
136
137 /* Lines per Frame = 272 (active data) + 14 (padding) */
138 #define EPPI_FRAME 286
139
140 /* FS1 (Hsync) Width (Typical)*/
141 #define EPPI_FS1W_HBL 41
142
143 /* FS1 (Hsync) Period (Typical) */
144 #define EPPI_FS1P_AVPL EPPI_LINE
145
146 /* Horizontal Delay clock after assertion of Hsync (Typical) */
147 #define EPPI_HDELAY 43
148
149 /* FS2 (Vsync) Width = FS1 (Hsync) Period * 10 */
150 #define EPPI_FS2W_LVB (EPPI_LINE * 10)
151
152 /* FS2 (Vsync) Period = FS1 (Hsync) Period * Lines per Frame */
153 #define EPPI_FS2P_LAVF (EPPI_LINE * EPPI_FRAME)
154
155 /* Vertical Delay after assertion of Vsync (2 Lines) */
156 #define EPPI_VDELAY 12
157
158 #define EPPI_CLIP 0xFF00FF00
159
160 /* EPPI Control register configuration value for RGB out
161 * - EPPI as Output
162 * GP 2 frame sync mode,
163 * Internal Clock generation disabled, Internal FS generation enabled,
164 * Receives samples on EPPI_CLK raising edge, Transmits samples on EPPI_CLK falling edge,
165 * FS1 & FS2 are active high,
166 * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out)
167 * DMA Unpacking disabled when RGB Formating is enabled, otherwise DMA unpacking enabled
168 * Swapping Enabled,
169 * One (DMA) Channel Mode,
170 * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output
171 * Regular watermark - when FIFO is 100% full,
172 * Urgent watermark - when FIFO is 75% full
173 */
174
175 #define EPPI_CONTROL (0x20136E2E | SWAPEN)
176
get_eppi_clkdiv(u32 target_ppi_clk)177 static inline u16 get_eppi_clkdiv(u32 target_ppi_clk)
178 {
179 u32 sclk = get_sclk();
180
181 /* EPPI_CLK = (SCLK) / (2 * (EPPI_CLKDIV[15:0] + 1)) */
182
183 return (((sclk / target_ppi_clk) / 2) - 1);
184 }
185
config_ppi(struct bfin_bf54xfb_info * fbi)186 static void config_ppi(struct bfin_bf54xfb_info *fbi)
187 {
188
189 u16 eppi_clkdiv = get_eppi_clkdiv(LCD_CLK);
190
191 bfin_write_EPPI0_FS1W_HBL(EPPI_FS1W_HBL);
192 bfin_write_EPPI0_FS1P_AVPL(EPPI_FS1P_AVPL);
193 bfin_write_EPPI0_FS2W_LVB(EPPI_FS2W_LVB);
194 bfin_write_EPPI0_FS2P_LAVF(EPPI_FS2P_LAVF);
195 bfin_write_EPPI0_CLIP(EPPI_CLIP);
196
197 bfin_write_EPPI0_FRAME(EPPI_FRAME);
198 bfin_write_EPPI0_LINE(EPPI_LINE);
199
200 bfin_write_EPPI0_HCOUNT(EPPI_HCOUNT);
201 bfin_write_EPPI0_HDELAY(EPPI_HDELAY);
202 bfin_write_EPPI0_VCOUNT(EPPI_VCOUNT);
203 bfin_write_EPPI0_VDELAY(EPPI_VDELAY);
204
205 bfin_write_EPPI0_CLKDIV(eppi_clkdiv);
206
207 /*
208 * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out)
209 * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output
210 */
211 if (outp_rgb666)
212 bfin_write_EPPI0_CONTROL((EPPI_CONTROL & ~DLENGTH) | DLEN_18 |
213 RGB_FMT_EN);
214 else
215 bfin_write_EPPI0_CONTROL(((EPPI_CONTROL & ~DLENGTH) | DLEN_24) &
216 ~RGB_FMT_EN);
217
218
219 }
220
config_dma(struct bfin_bf54xfb_info * fbi)221 static int config_dma(struct bfin_bf54xfb_info *fbi)
222 {
223
224 set_dma_config(CH_EPPI0,
225 set_bfin_dma_config(DIR_READ, DMA_FLOW_AUTO,
226 INTR_DISABLE, DIMENSION_2D,
227 DATA_SIZE_32,
228 DMA_NOSYNC_KEEP_DMA_BUF));
229 set_dma_x_count(CH_EPPI0, (LCD_X_RES * LCD_BPP) / DMA_BUS_SIZE);
230 set_dma_x_modify(CH_EPPI0, DMA_BUS_SIZE / 8);
231 set_dma_y_count(CH_EPPI0, LCD_Y_RES);
232 set_dma_y_modify(CH_EPPI0, DMA_BUS_SIZE / 8);
233 set_dma_start_addr(CH_EPPI0, (unsigned long)fbi->fb_buffer);
234
235 return 0;
236 }
237
request_ports(struct bfin_bf54xfb_info * fbi)238 static int request_ports(struct bfin_bf54xfb_info *fbi)
239 {
240
241 u16 eppi_req_18[] = EPPI0_18;
242 u16 disp = fbi->mach_info->disp;
243
244 if (gpio_request(disp, DRIVER_NAME)) {
245 printk(KERN_ERR "Requesting GPIO %d faild\n", disp);
246 return -EFAULT;
247 }
248
249 if (peripheral_request_list(eppi_req_18, DRIVER_NAME)) {
250 printk(KERN_ERR "Requesting Peripherals faild\n");
251 gpio_free(disp);
252 return -EFAULT;
253 }
254
255 if (!outp_rgb666) {
256
257 u16 eppi_req_24[] = EPPI0_24;
258
259 if (peripheral_request_list(eppi_req_24, DRIVER_NAME)) {
260 printk(KERN_ERR "Requesting Peripherals faild\n");
261 peripheral_free_list(eppi_req_18);
262 gpio_free(disp);
263 return -EFAULT;
264 }
265 }
266
267 gpio_direction_output(disp, 1);
268
269 return 0;
270 }
271
free_ports(struct bfin_bf54xfb_info * fbi)272 static void free_ports(struct bfin_bf54xfb_info *fbi)
273 {
274
275 u16 eppi_req_18[] = EPPI0_18;
276
277 gpio_free(fbi->mach_info->disp);
278
279 peripheral_free_list(eppi_req_18);
280
281 if (!outp_rgb666) {
282 u16 eppi_req_24[] = EPPI0_24;
283 peripheral_free_list(eppi_req_24);
284 }
285 }
286
bfin_bf54x_fb_open(struct fb_info * info,int user)287 static int bfin_bf54x_fb_open(struct fb_info *info, int user)
288 {
289 struct bfin_bf54xfb_info *fbi = info->par;
290
291 spin_lock(&fbi->lock);
292 fbi->lq043_open_cnt++;
293
294 if (fbi->lq043_open_cnt <= 1) {
295
296 bfin_write_EPPI0_CONTROL(0);
297 SSYNC();
298
299 config_dma(fbi);
300 config_ppi(fbi);
301
302 /* start dma */
303 enable_dma(CH_EPPI0);
304 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
305 }
306
307 spin_unlock(&fbi->lock);
308
309 return 0;
310 }
311
bfin_bf54x_fb_release(struct fb_info * info,int user)312 static int bfin_bf54x_fb_release(struct fb_info *info, int user)
313 {
314 struct bfin_bf54xfb_info *fbi = info->par;
315
316 spin_lock(&fbi->lock);
317
318 fbi->lq043_open_cnt--;
319 fbi->lq043_mmap = 0;
320
321 if (fbi->lq043_open_cnt <= 0) {
322
323 bfin_write_EPPI0_CONTROL(0);
324 SSYNC();
325 disable_dma(CH_EPPI0);
326 memset(fbi->fb_buffer, 0, info->fix.smem_len);
327 }
328
329 spin_unlock(&fbi->lock);
330
331 return 0;
332 }
333
bfin_bf54x_fb_check_var(struct fb_var_screeninfo * var,struct fb_info * info)334 static int bfin_bf54x_fb_check_var(struct fb_var_screeninfo *var,
335 struct fb_info *info)
336 {
337
338 switch (var->bits_per_pixel) {
339 case 24:/* TRUECOLOUR, 16m */
340 var->red.offset = 16;
341 var->green.offset = 8;
342 var->blue.offset = 0;
343 var->red.length = var->green.length = var->blue.length = 8;
344 var->transp.offset = 0;
345 var->transp.length = 0;
346 var->transp.msb_right = 0;
347 var->red.msb_right = 0;
348 var->green.msb_right = 0;
349 var->blue.msb_right = 0;
350 break;
351 default:
352 pr_debug("%s: depth not supported: %u BPP\n", __func__,
353 var->bits_per_pixel);
354 return -EINVAL;
355 }
356
357 if (info->var.xres != var->xres || info->var.yres != var->yres ||
358 info->var.xres_virtual != var->xres_virtual ||
359 info->var.yres_virtual != var->yres_virtual) {
360 pr_debug("%s: Resolution not supported: X%u x Y%u \n",
361 __func__, var->xres, var->yres);
362 return -EINVAL;
363 }
364
365 /*
366 * Memory limit
367 */
368
369 if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
370 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
371 __func__, var->yres_virtual);
372 return -ENOMEM;
373 }
374
375 return 0;
376 }
377
bfin_bf54x_fb_mmap(struct fb_info * info,struct vm_area_struct * vma)378 static int bfin_bf54x_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
379 {
380
381 struct bfin_bf54xfb_info *fbi = info->par;
382
383 if (fbi->lq043_mmap)
384 return -1;
385
386 spin_lock(&fbi->lock);
387 fbi->lq043_mmap = 1;
388 spin_unlock(&fbi->lock);
389
390 vma->vm_start = (unsigned long)(fbi->fb_buffer);
391
392 vma->vm_end = vma->vm_start + info->fix.smem_len;
393 /* For those who don't understand how mmap works, go read
394 * Documentation/nommu-mmap.txt.
395 * For those that do, you will know that the VM_MAYSHARE flag
396 * must be set in the vma->vm_flags structure on noMMU
397 * Other flags can be set, and are documented in
398 * include/linux/mm.h
399 */
400 vma->vm_flags |= VM_MAYSHARE | VM_SHARED;
401
402 return 0;
403 }
404
bfin_bf54x_fb_cursor(struct fb_info * info,struct fb_cursor * cursor)405 int bfin_bf54x_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
406 {
407 if (nocursor)
408 return 0;
409 else
410 return -EINVAL; /* just to force soft_cursor() call */
411 }
412
bfin_bf54x_fb_setcolreg(u_int regno,u_int red,u_int green,u_int blue,u_int transp,struct fb_info * info)413 static int bfin_bf54x_fb_setcolreg(u_int regno, u_int red, u_int green,
414 u_int blue, u_int transp,
415 struct fb_info *info)
416 {
417 if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
418 return -EINVAL;
419
420 if (info->var.grayscale) {
421 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
422 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
423 }
424
425 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
426
427 u32 value;
428 /* Place color in the pseudopalette */
429 if (regno > 16)
430 return -EINVAL;
431
432 red >>= (16 - info->var.red.length);
433 green >>= (16 - info->var.green.length);
434 blue >>= (16 - info->var.blue.length);
435
436 value = (red << info->var.red.offset) |
437 (green << info->var.green.offset) |
438 (blue << info->var.blue.offset);
439 value &= 0xFFFFFF;
440
441 ((u32 *) (info->pseudo_palette))[regno] = value;
442
443 }
444
445 return 0;
446 }
447
448 static struct fb_ops bfin_bf54x_fb_ops = {
449 .owner = THIS_MODULE,
450 .fb_open = bfin_bf54x_fb_open,
451 .fb_release = bfin_bf54x_fb_release,
452 .fb_check_var = bfin_bf54x_fb_check_var,
453 .fb_fillrect = cfb_fillrect,
454 .fb_copyarea = cfb_copyarea,
455 .fb_imageblit = cfb_imageblit,
456 .fb_mmap = bfin_bf54x_fb_mmap,
457 .fb_cursor = bfin_bf54x_fb_cursor,
458 .fb_setcolreg = bfin_bf54x_fb_setcolreg,
459 };
460
461 #ifndef NO_BL_SUPPORT
bl_get_brightness(struct backlight_device * bd)462 static int bl_get_brightness(struct backlight_device *bd)
463 {
464 return 0;
465 }
466
467 static struct backlight_ops bfin_lq043fb_bl_ops = {
468 .get_brightness = bl_get_brightness,
469 };
470
471 static struct backlight_device *bl_dev;
472
bfin_lcd_get_power(struct lcd_device * dev)473 static int bfin_lcd_get_power(struct lcd_device *dev)
474 {
475 return 0;
476 }
477
bfin_lcd_set_power(struct lcd_device * dev,int power)478 static int bfin_lcd_set_power(struct lcd_device *dev, int power)
479 {
480 return 0;
481 }
482
bfin_lcd_get_contrast(struct lcd_device * dev)483 static int bfin_lcd_get_contrast(struct lcd_device *dev)
484 {
485 return 0;
486 }
487
bfin_lcd_set_contrast(struct lcd_device * dev,int contrast)488 static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
489 {
490
491 return 0;
492 }
493
bfin_lcd_check_fb(struct lcd_device * dev,struct fb_info * fi)494 static int bfin_lcd_check_fb(struct lcd_device *dev, struct fb_info *fi)
495 {
496 if (!fi || (fi == &bfin_bf54x_fb))
497 return 1;
498 return 0;
499 }
500
501 static struct lcd_ops bfin_lcd_ops = {
502 .get_power = bfin_lcd_get_power,
503 .set_power = bfin_lcd_set_power,
504 .get_contrast = bfin_lcd_get_contrast,
505 .set_contrast = bfin_lcd_set_contrast,
506 .check_fb = bfin_lcd_check_fb,
507 };
508
509 static struct lcd_device *lcd_dev;
510 #endif
511
bfin_bf54x_irq_error(int irq,void * dev_id)512 static irqreturn_t bfin_bf54x_irq_error(int irq, void *dev_id)
513 {
514 /*struct bfin_bf54xfb_info *info = dev_id;*/
515
516 u16 status = bfin_read_EPPI0_STATUS();
517
518 bfin_write_EPPI0_STATUS(0xFFFF);
519
520 if (status) {
521 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
522 disable_dma(CH_EPPI0);
523
524 /* start dma */
525 enable_dma(CH_EPPI0);
526 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
527 bfin_write_EPPI0_STATUS(0xFFFF);
528 }
529
530 return IRQ_HANDLED;
531 }
532
bfin_bf54x_probe(struct platform_device * pdev)533 static int __init bfin_bf54x_probe(struct platform_device *pdev)
534 {
535 struct bfin_bf54xfb_info *info;
536 struct fb_info *fbinfo;
537 int ret;
538
539 printk(KERN_INFO DRIVER_NAME ": FrameBuffer initializing...\n");
540
541 if (request_dma(CH_EPPI0, "CH_EPPI0") < 0) {
542 printk(KERN_ERR DRIVER_NAME
543 ": couldn't request CH_EPPI0 DMA\n");
544 ret = -EFAULT;
545 goto out1;
546 }
547
548 fbinfo =
549 framebuffer_alloc(sizeof(struct bfin_bf54xfb_info), &pdev->dev);
550 if (!fbinfo) {
551 ret = -ENOMEM;
552 goto out2;
553 }
554
555 info = fbinfo->par;
556 info->fb = fbinfo;
557 info->dev = &pdev->dev;
558
559 platform_set_drvdata(pdev, fbinfo);
560
561 strcpy(fbinfo->fix.id, driver_name);
562
563 info->mach_info = pdev->dev.platform_data;
564
565 if (info->mach_info == NULL) {
566 dev_err(&pdev->dev,
567 "no platform data for lcd, cannot attach\n");
568 ret = -EINVAL;
569 goto out3;
570 }
571
572 fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
573 fbinfo->fix.type_aux = 0;
574 fbinfo->fix.xpanstep = 0;
575 fbinfo->fix.ypanstep = 0;
576 fbinfo->fix.ywrapstep = 0;
577 fbinfo->fix.accel = FB_ACCEL_NONE;
578 fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
579
580 fbinfo->var.nonstd = 0;
581 fbinfo->var.activate = FB_ACTIVATE_NOW;
582 fbinfo->var.height = info->mach_info->height;
583 fbinfo->var.width = info->mach_info->width;
584 fbinfo->var.accel_flags = 0;
585 fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
586
587 fbinfo->fbops = &bfin_bf54x_fb_ops;
588 fbinfo->flags = FBINFO_FLAG_DEFAULT;
589
590 fbinfo->var.xres = info->mach_info->xres.defval;
591 fbinfo->var.xres_virtual = info->mach_info->xres.defval;
592 fbinfo->var.yres = info->mach_info->yres.defval;
593 fbinfo->var.yres_virtual = info->mach_info->yres.defval;
594 fbinfo->var.bits_per_pixel = info->mach_info->bpp.defval;
595
596 fbinfo->var.upper_margin = 0;
597 fbinfo->var.lower_margin = 0;
598 fbinfo->var.vsync_len = 0;
599
600 fbinfo->var.left_margin = 0;
601 fbinfo->var.right_margin = 0;
602 fbinfo->var.hsync_len = 0;
603
604 fbinfo->var.red.offset = 16;
605 fbinfo->var.green.offset = 8;
606 fbinfo->var.blue.offset = 0;
607 fbinfo->var.transp.offset = 0;
608 fbinfo->var.red.length = 8;
609 fbinfo->var.green.length = 8;
610 fbinfo->var.blue.length = 8;
611 fbinfo->var.transp.length = 0;
612 fbinfo->fix.smem_len = info->mach_info->xres.max *
613 info->mach_info->yres.max * info->mach_info->bpp.max / 8;
614
615 fbinfo->fix.line_length = fbinfo->var.xres_virtual *
616 fbinfo->var.bits_per_pixel / 8;
617
618 info->fb_buffer =
619 dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
620 GFP_KERNEL);
621
622 if (NULL == info->fb_buffer) {
623 printk(KERN_ERR DRIVER_NAME
624 ": couldn't allocate dma buffer.\n");
625 ret = -ENOMEM;
626 goto out3;
627 }
628
629 memset(info->fb_buffer, 0, fbinfo->fix.smem_len);
630
631 fbinfo->screen_base = (void *)info->fb_buffer;
632 fbinfo->fix.smem_start = (int)info->fb_buffer;
633
634 fbinfo->fbops = &bfin_bf54x_fb_ops;
635
636 fbinfo->pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL);
637 if (!fbinfo->pseudo_palette) {
638 printk(KERN_ERR DRIVER_NAME
639 "Fail to allocate pseudo_palette\n");
640
641 ret = -ENOMEM;
642 goto out4;
643 }
644
645 memset(fbinfo->pseudo_palette, 0, sizeof(u32) * 16);
646
647 if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0)
648 < 0) {
649 printk(KERN_ERR DRIVER_NAME
650 "Fail to allocate colormap (%d entries)\n",
651 BFIN_LCD_NBR_PALETTE_ENTRIES);
652 ret = -EFAULT;
653 goto out5;
654 }
655
656 if (request_ports(info)) {
657 printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.\n");
658 ret = -EFAULT;
659 goto out6;
660 }
661
662 info->irq = platform_get_irq(pdev, 0);
663 if (info->irq < 0) {
664 ret = -EINVAL;
665 goto out7;
666 }
667
668 if (request_irq(info->irq, bfin_bf54x_irq_error, IRQF_DISABLED,
669 "PPI ERROR", info) < 0) {
670 printk(KERN_ERR DRIVER_NAME
671 ": unable to request PPI ERROR IRQ\n");
672 ret = -EFAULT;
673 goto out7;
674 }
675
676 if (register_framebuffer(fbinfo) < 0) {
677 printk(KERN_ERR DRIVER_NAME
678 ": unable to register framebuffer.\n");
679 ret = -EINVAL;
680 goto out8;
681 }
682 #ifndef NO_BL_SUPPORT
683 bl_dev =
684 backlight_device_register("bf54x-bl", NULL, NULL,
685 &bfin_lq043fb_bl_ops);
686 bl_dev->props.max_brightness = 255;
687
688 lcd_dev = lcd_device_register(DRIVER_NAME, &pdev->dev, NULL, &bfin_lcd_ops);
689 lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.\n");
690 #endif
691
692 return 0;
693
694 out8:
695 free_irq(info->irq, info);
696 out7:
697 free_ports(info);
698 out6:
699 fb_dealloc_cmap(&fbinfo->cmap);
700 out5:
701 kfree(fbinfo->pseudo_palette);
702 out4:
703 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
704 info->dma_handle);
705 out3:
706 framebuffer_release(fbinfo);
707 out2:
708 free_dma(CH_EPPI0);
709 out1:
710 platform_set_drvdata(pdev, NULL);
711
712 return ret;
713 }
714
bfin_bf54x_remove(struct platform_device * pdev)715 static int bfin_bf54x_remove(struct platform_device *pdev)
716 {
717
718 struct fb_info *fbinfo = platform_get_drvdata(pdev);
719 struct bfin_bf54xfb_info *info = fbinfo->par;
720
721 free_dma(CH_EPPI0);
722 free_irq(info->irq, info);
723
724 if (info->fb_buffer != NULL)
725 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
726 info->dma_handle);
727
728 kfree(fbinfo->pseudo_palette);
729 fb_dealloc_cmap(&fbinfo->cmap);
730
731 #ifndef NO_BL_SUPPORT
732 lcd_device_unregister(lcd_dev);
733 backlight_device_unregister(bl_dev);
734 #endif
735
736 unregister_framebuffer(fbinfo);
737
738 free_ports(info);
739
740 printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.\n");
741
742 return 0;
743 }
744
745 #ifdef CONFIG_PM
bfin_bf54x_suspend(struct platform_device * pdev,pm_message_t state)746 static int bfin_bf54x_suspend(struct platform_device *pdev, pm_message_t state)
747 {
748 struct fb_info *fbinfo = platform_get_drvdata(pdev);
749
750 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
751 disable_dma(CH_EPPI0);
752 bfin_write_EPPI0_STATUS(0xFFFF);
753
754 return 0;
755 }
756
bfin_bf54x_resume(struct platform_device * pdev)757 static int bfin_bf54x_resume(struct platform_device *pdev)
758 {
759 struct fb_info *fbinfo = platform_get_drvdata(pdev);
760 struct bfin_bf54xfb_info *info = fbinfo->par;
761
762 if (info->lq043_open_cnt) {
763
764 bfin_write_EPPI0_CONTROL(0);
765 SSYNC();
766
767 config_dma(info);
768 config_ppi(info);
769
770 /* start dma */
771 enable_dma(CH_EPPI0);
772 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
773 }
774
775 return 0;
776 }
777 #else
778 #define bfin_bf54x_suspend NULL
779 #define bfin_bf54x_resume NULL
780 #endif
781
782 static struct platform_driver bfin_bf54x_driver = {
783 .probe = bfin_bf54x_probe,
784 .remove = bfin_bf54x_remove,
785 .suspend = bfin_bf54x_suspend,
786 .resume = bfin_bf54x_resume,
787 .driver = {
788 .name = DRIVER_NAME,
789 .owner = THIS_MODULE,
790 },
791 };
792
bfin_bf54x_driver_init(void)793 static int __devinit bfin_bf54x_driver_init(void)
794 {
795 return platform_driver_register(&bfin_bf54x_driver);
796 }
797
bfin_bf54x_driver_cleanup(void)798 static void __exit bfin_bf54x_driver_cleanup(void)
799 {
800 platform_driver_unregister(&bfin_bf54x_driver);
801 }
802
803 MODULE_DESCRIPTION("Blackfin BF54x TFT LCD Driver");
804 MODULE_LICENSE("GPL");
805
806 module_init(bfin_bf54x_driver_init);
807 module_exit(bfin_bf54x_driver_cleanup);
808