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[Blackfin] arch: Initial checkin of the memory protection support.
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / video / bf54x-lq043fb.c
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e9fa7c43
MH		 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 2004-2007 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 <asm/mach/bf54x-lq043.h>
62
63#define NO_BL_SUPPORT
64
65#define DRIVER_NAME "bf54x-lq043"
66static 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
76struct 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
91static int nocursor;
92module_param(nocursor, int, 0644);
93MODULE_PARM_DESC(nocursor, "cursor enable/disable");
94
95static int outp_rgb666;
96module_param(outp_rgb666, int, 0);
97MODULE_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
177static 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
186static 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
221static 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,
2047e40d
MH		 227 DATA_SIZE_32,
228 DMA_NOSYNC_KEEP_DMA_BUF));
e9fa7c43
MH		 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
238static 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, NULL)) {
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);
268 gpio_set_value(disp, 1);
269
270 return 0;
271}
272
273static void free_ports(struct bfin_bf54xfb_info *fbi)
274{
275
276 u16 eppi_req_18[] = EPPI0_18;
277
278 gpio_free(fbi->mach_info->disp);
279
280 peripheral_free_list(eppi_req_18);
281
282 if (!outp_rgb666) {
283 u16 eppi_req_24[] = EPPI0_24;
284 peripheral_free_list(eppi_req_24);
285 }
286}
287
288static int bfin_bf54x_fb_open(struct fb_info *info, int user)
289{
290 struct bfin_bf54xfb_info *fbi = info->par;
291
292 spin_lock(&fbi->lock);
293 fbi->lq043_open_cnt++;
294
295 if (fbi->lq043_open_cnt <= 1) {
296
297 bfin_write_EPPI0_CONTROL(0);
298 SSYNC();
299
300 config_dma(fbi);
301 config_ppi(fbi);
302
303 /* start dma */
304 enable_dma(CH_EPPI0);
305 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
306 }
307
308 spin_unlock(&fbi->lock);
309
310 return 0;
311}
312
313static int bfin_bf54x_fb_release(struct fb_info *info, int user)
314{
315 struct bfin_bf54xfb_info *fbi = info->par;
316
317 spin_lock(&fbi->lock);
318
319 fbi->lq043_open_cnt--;
320 fbi->lq043_mmap = 0;
321
322 if (fbi->lq043_open_cnt <= 0) {
323
324 bfin_write_EPPI0_CONTROL(0);
325 SSYNC();
326 disable_dma(CH_EPPI0);
327 memset(fbi->fb_buffer, 0, info->fix.smem_len);
328 }
329
330 spin_unlock(&fbi->lock);
331
332 return 0;
333}
334
335static int bfin_bf54x_fb_check_var(struct fb_var_screeninfo *var,
336 struct fb_info *info)
337{
338
339 if (var->bits_per_pixel != LCD_BPP) {
340 pr_debug("%s: depth not supported: %u BPP\n", __FUNCTION__,
341 var->bits_per_pixel);
342 return -EINVAL;
343 }
344
345 if (info->var.xres != var->xres || info->var.yres != var->yres ||
346 info->var.xres_virtual != var->xres_virtual ||
347 info->var.yres_virtual != var->yres_virtual) {
348 pr_debug("%s: Resolution not supported: X%u x Y%u \n",
349 __FUNCTION__, var->xres, var->yres);
350 return -EINVAL;
351 }
352
353 /*
354 * Memory limit
355 */
356
357 if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
358 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
359 __FUNCTION__, var->yres_virtual);
360 return -ENOMEM;
361 }
362
363 return 0;
364}
365
366static int bfin_bf54x_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
367{
368
369 struct bfin_bf54xfb_info *fbi = info->par;
370
371 if (fbi->lq043_mmap)
372 return -1;
373
374 spin_lock(&fbi->lock);
375 fbi->lq043_mmap = 1;
376 spin_unlock(&fbi->lock);
377
378 vma->vm_start = (unsigned long)(fbi->fb_buffer);
379
380 vma->vm_end = vma->vm_start + info->fix.smem_len;
381 /* For those who don't understand how mmap works, go read
382 * Documentation/nommu-mmap.txt.
383 * For those that do, you will know that the VM_MAYSHARE flag
384 * must be set in the vma->vm_flags structure on noMMU
385 * Other flags can be set, and are documented in
386 * include/linux/mm.h
387 */
388 vma->vm_flags |= VM_MAYSHARE;
389
390 return 0;
391}
392
393int bfin_bf54x_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
394{
395 if (nocursor)
396 return 0;
397 else
398 return -EINVAL; /* just to force soft_cursor() call */
399}
400
401static int bfin_bf54x_fb_setcolreg(u_int regno, u_int red, u_int green,
402 u_int blue, u_int transp,
403 struct fb_info *info)
404{
405 if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
406 return -EINVAL;
407
408 if (info->var.grayscale) {
409 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
410 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
411 }
412
413 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
414
415 u32 value;
416 /* Place color in the pseudopalette */
417 if (regno > 16)
418 return -EINVAL;
419
420 red >>= (16 - info->var.red.length);
421 green >>= (16 - info->var.green.length);
422 blue >>= (16 - info->var.blue.length);
423
424 value = (red << info->var.red.offset) |
425 (green << info->var.green.offset) |
426 (blue << info->var.blue.offset);
427 value &= 0xFFFFFF;
428
429 ((u32 *) (info->pseudo_palette))[regno] = value;
430
431 }
432
433 return 0;
434}
435
436static struct fb_ops bfin_bf54x_fb_ops = {
437 .owner = THIS_MODULE,
438 .fb_open = bfin_bf54x_fb_open,
439 .fb_release = bfin_bf54x_fb_release,
440 .fb_check_var = bfin_bf54x_fb_check_var,
441 .fb_fillrect = cfb_fillrect,
442 .fb_copyarea = cfb_copyarea,
443 .fb_imageblit = cfb_imageblit,
444 .fb_mmap = bfin_bf54x_fb_mmap,
445 .fb_cursor = bfin_bf54x_fb_cursor,
446 .fb_setcolreg = bfin_bf54x_fb_setcolreg,
447};
448
449#ifndef NO_BL_SUPPORT
450static int bl_get_brightness(struct backlight_device *bd)
451{
452 return 0;
453}
454
455static struct backlight_ops bfin_lq043fb_bl_ops = {
456 .get_brightness = bl_get_brightness,
457};
458
459static struct backlight_device *bl_dev;
460
461static int bfin_lcd_get_power(struct lcd_device *dev)
462{
463 return 0;
464}
465
466static int bfin_lcd_set_power(struct lcd_device *dev, int power)
467{
468 return 0;
469}
470
471static int bfin_lcd_get_contrast(struct lcd_device *dev)
472{
473 return 0;
474}
475
476static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
477{
478
479 return 0;
480}
481
482static int bfin_lcd_check_fb(struct fb_info *fi)
483{
484 if (!fi || (fi == &bfin_bf54x_fb))
485 return 1;
486 return 0;
487}
488
489static struct lcd_ops bfin_lcd_ops = {
490 .get_power = bfin_lcd_get_power,
491 .set_power = bfin_lcd_set_power,
492 .get_contrast = bfin_lcd_get_contrast,
493 .set_contrast = bfin_lcd_set_contrast,
494 .check_fb = bfin_lcd_check_fb,
495};
496
497static struct lcd_device *lcd_dev;
498#endif
499
500static irqreturn_t bfin_bf54x_irq_error(int irq, void *dev_id)
501{
502
503 /*struct bfin_bf54xfb_info *info = (struct bfin_bf54xfb_info *)dev_id;*/
504
505 u16 status = bfin_read_EPPI0_STATUS();
506
507 bfin_write_EPPI0_STATUS(0xFFFF);
508
509 if (status) {
510 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
511 disable_dma(CH_EPPI0);
512
513 /* start dma */
514 enable_dma(CH_EPPI0);
515 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
516 bfin_write_EPPI0_STATUS(0xFFFF);
517 }
518
519 return IRQ_HANDLED;
520}
521
522static int __init bfin_bf54x_probe(struct platform_device *pdev)
523{
524 struct bfin_bf54xfb_info *info;
525 struct fb_info *fbinfo;
526 int ret;
527
528 printk(KERN_INFO DRIVER_NAME ": FrameBuffer initializing...\n");
529
530 if (request_dma(CH_EPPI0, "CH_EPPI0") < 0) {
531 printk(KERN_ERR DRIVER_NAME
532 ": couldn't request CH_EPPI0 DMA\n");
533 ret = -EFAULT;
534 goto out1;
535 }
536
537 fbinfo =
538 framebuffer_alloc(sizeof(struct bfin_bf54xfb_info), &pdev->dev);
539 if (!fbinfo) {
540 ret = -ENOMEM;
541 goto out2;
542 }
543
544 info = fbinfo->par;
545 info->fb = fbinfo;
546 info->dev = &pdev->dev;
547
548 platform_set_drvdata(pdev, fbinfo);
549
550 strcpy(fbinfo->fix.id, driver_name);
551
552 info->mach_info = pdev->dev.platform_data;
553
554 if (info->mach_info == NULL) {
555 dev_err(&pdev->dev,
556 "no platform data for lcd, cannot attach\n");
557 ret = -EINVAL;
558 goto out3;
559 }
560
561 fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
562 fbinfo->fix.type_aux = 0;
563 fbinfo->fix.xpanstep = 0;
564 fbinfo->fix.ypanstep = 0;
565 fbinfo->fix.ywrapstep = 0;
566 fbinfo->fix.accel = FB_ACCEL_NONE;
567 fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
568
569 fbinfo->var.nonstd = 0;
570 fbinfo->var.activate = FB_ACTIVATE_NOW;
571 fbinfo->var.height = info->mach_info->height;
572 fbinfo->var.width = info->mach_info->width;
573 fbinfo->var.accel_flags = 0;
574 fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
575
576 fbinfo->fbops = &bfin_bf54x_fb_ops;
577 fbinfo->flags = FBINFO_FLAG_DEFAULT;
578
579 fbinfo->var.xres = info->mach_info->xres.defval;
580 fbinfo->var.xres_virtual = info->mach_info->xres.defval;
581 fbinfo->var.yres = info->mach_info->yres.defval;
582 fbinfo->var.yres_virtual = info->mach_info->yres.defval;
583 fbinfo->var.bits_per_pixel = info->mach_info->bpp.defval;
584
585 fbinfo->var.upper_margin = 0;
586 fbinfo->var.lower_margin = 0;
587 fbinfo->var.vsync_len = 0;
588
589 fbinfo->var.left_margin = 0;
590 fbinfo->var.right_margin = 0;
591 fbinfo->var.hsync_len = 0;
592
593 fbinfo->var.red.offset = 16;
594 fbinfo->var.green.offset = 8;
595 fbinfo->var.blue.offset = 0;
596 fbinfo->var.transp.offset = 0;
597 fbinfo->var.red.length = 8;
598 fbinfo->var.green.length = 8;
599 fbinfo->var.blue.length = 8;
600 fbinfo->var.transp.length = 0;
601 fbinfo->fix.smem_len = info->mach_info->xres.max *
602 info->mach_info->yres.max * info->mach_info->bpp.max / 8;
603
604 fbinfo->fix.line_length = fbinfo->var.xres_virtual *
605 fbinfo->var.bits_per_pixel / 8;
606
607 info->fb_buffer =
608 dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
609 GFP_KERNEL);
610
611 if (NULL == info->fb_buffer) {
612 printk(KERN_ERR DRIVER_NAME
613 ": couldn't allocate dma buffer.\n");
614 ret = -ENOMEM;
615 goto out3;
616 }
617
618 memset(info->fb_buffer, 0, fbinfo->fix.smem_len);
619
620 fbinfo->screen_base = (void *)info->fb_buffer;
621 fbinfo->fix.smem_start = (int)info->fb_buffer;
622
623 fbinfo->fbops = &bfin_bf54x_fb_ops;
624
625 fbinfo->pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL);
626 if (!fbinfo->pseudo_palette) {
627 printk(KERN_ERR DRIVER_NAME
628 "Fail to allocate pseudo_palette\n");
629
630 ret = -ENOMEM;
631 goto out4;
632 }
633
634 memset(fbinfo->pseudo_palette, 0, sizeof(u32) * 16);
635
636 if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0)
637 < 0) {
638 printk(KERN_ERR DRIVER_NAME
639 "Fail to allocate colormap (%d entries)\n",
640 BFIN_LCD_NBR_PALETTE_ENTRIES);
641 ret = -EFAULT;
642 goto out5;
643 }
644
645 if (request_ports(info)) {
646 printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.\n");
647 ret = -EFAULT;
648 goto out6;
649 }
650
651 info->irq = platform_get_irq(pdev, 0);
652 if (info->irq < 0) {
653 ret = -EINVAL;
654 goto out7;
655 }
656
657 if (request_irq(info->irq, (void *)bfin_bf54x_irq_error, IRQF_DISABLED,
658 "PPI ERROR", info) < 0) {
659 printk(KERN_ERR DRIVER_NAME
660 ": unable to request PPI ERROR IRQ\n");
661 ret = -EFAULT;
662 goto out7;
663 }
664
665 if (register_framebuffer(fbinfo) < 0) {
666 printk(KERN_ERR DRIVER_NAME
667 ": unable to register framebuffer.\n");
668 ret = -EINVAL;
669 goto out8;
670 }
671#ifndef NO_BL_SUPPORT
672 bl_dev =
673 backlight_device_register("bf54x-bl", NULL, NULL,
674 &bfin_lq043fb_bl_ops);
675 bl_dev->props.max_brightness = 255;
676
677 lcd_dev = lcd_device_register(DRIVER_NAME, NULL, &bfin_lcd_ops);
678 lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.\n");
679#endif
680
681 return 0;
682
683out8:
684 free_irq(info->irq, info);
685out7:
686 free_ports(info);
687out6:
688 fb_dealloc_cmap(&fbinfo->cmap);
689out5:
690 kfree(fbinfo->pseudo_palette);
691out4:
692 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
693 info->dma_handle);
694out3:
695 framebuffer_release(fbinfo);
696out2:
697 free_dma(CH_EPPI0);
698out1:
699 platform_set_drvdata(pdev, NULL);
700
701 return ret;
702}
703
704static int bfin_bf54x_remove(struct platform_device *pdev)
705{
706
707 struct fb_info *fbinfo = platform_get_drvdata(pdev);
708 struct bfin_bf54xfb_info *info = fbinfo->par;
709
710 free_dma(CH_EPPI0);
711 free_irq(info->irq, info);
712
713 if (info->fb_buffer != NULL)
714 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
715 info->dma_handle);
716
717 kfree(fbinfo->pseudo_palette);
718 fb_dealloc_cmap(&fbinfo->cmap);
719
720#ifndef NO_BL_SUPPORT
721 lcd_device_unregister(lcd_dev);
722 backlight_device_unregister(bl_dev);
723#endif
724
725 unregister_framebuffer(fbinfo);
726
727 free_ports(info);
728
729 printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.\n");
730
731 return 0;
732}
733
734#ifdef CONFIG_PM
735static int bfin_bf54x_suspend(struct platform_device *pdev, pm_message_t state)
736{
737 struct fb_info *fbinfo = platform_get_drvdata(pdev);
738 struct bfin_bf54xfb_info *info = fbinfo->par;
739
740 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
741 disable_dma(CH_EPPI0);
742 bfin_write_EPPI0_STATUS(0xFFFF);
743
744 return 0;
745}
746
747static int bfin_bf54x_resume(struct platform_device *pdev)
748{
749 struct fb_info *fbinfo = platform_get_drvdata(pdev);
750 struct bfin_bf54xfb_info *info = fbinfo->par;
751
752 enable_dma(CH_EPPI0);
753 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
754
755 return 0;
756}
757#else
758#define bfin_bf54x_suspend NULL
759#define bfin_bf54x_resume NULL
760#endif
761
762static struct platform_driver bfin_bf54x_driver = {
763 .probe = bfin_bf54x_probe,
764 .remove = bfin_bf54x_remove,
765 .suspend = bfin_bf54x_suspend,
766 .resume = bfin_bf54x_resume,
767 .driver = {
768 .name = DRIVER_NAME,
769 .owner = THIS_MODULE,
770 },
771};
772
773static int __devinit bfin_bf54x_driver_init(void)
774{
775 return platform_driver_register(&bfin_bf54x_driver);
776}
777
778static void __exit bfin_bf54x_driver_cleanup(void)
779{
780 platform_driver_unregister(&bfin_bf54x_driver);
781}
782
783MODULE_DESCRIPTION("Blackfin BF54x TFT LCD Driver");
784MODULE_LICENSE("GPL");
785
786module_init(bfin_bf54x_driver_init);
787module_exit(bfin_bf54x_driver_cleanup);
kernel source for telekom puls (alcatel/mediatek)