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Blackfin arch: fix bug - MPU crashes under stress
[linux.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 <[email protected]>
5 *
6 * Created:
7 * Description: ADSP-BF54x Framebufer driver
8 *
9 *
10 * Modified:
5e9e4ad0 11 * Copyright 2007-2008 Analog Devices Inc.
e9fa7c43
MH		 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
fdcc5358 244 if (gpio_request(disp, DRIVER_NAME)) {
e9fa7c43
MH		 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
acbcd263 267 gpio_direction_output(disp, 1);
e9fa7c43
MH		 268
269 return 0;
270}
271
272static 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
287static 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
312static 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
334static int bfin_bf54x_fb_check_var(struct fb_var_screeninfo *var,
335 struct fb_info *info)
336{
337
338 if (var->bits_per_pixel != LCD_BPP) {
5ae12170 339 pr_debug("%s: depth not supported: %u BPP\n", __func__,
e9fa7c43
MH		 340 var->bits_per_pixel);
341 return -EINVAL;
342 }
343
344 if (info->var.xres != var->xres || info->var.yres != var->yres ||
345 info->var.xres_virtual != var->xres_virtual ||
346 info->var.yres_virtual != var->yres_virtual) {
347 pr_debug("%s: Resolution not supported: X%u x Y%u \n",
5ae12170 348 __func__, var->xres, var->yres);
e9fa7c43
MH		 349 return -EINVAL;
350 }
351
352 /*
353 * Memory limit
354 */
355
356 if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
357 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
5ae12170 358 __func__, var->yres_virtual);
e9fa7c43
MH		 359 return -ENOMEM;
360 }
361
362 return 0;
363}
364
365static int bfin_bf54x_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
366{
367
368 struct bfin_bf54xfb_info *fbi = info->par;
369
370 if (fbi->lq043_mmap)
371 return -1;
372
373 spin_lock(&fbi->lock);
374 fbi->lq043_mmap = 1;
375 spin_unlock(&fbi->lock);
376
377 vma->vm_start = (unsigned long)(fbi->fb_buffer);
378
379 vma->vm_end = vma->vm_start + info->fix.smem_len;
380 /* For those who don't understand how mmap works, go read
381 * Documentation/nommu-mmap.txt.
382 * For those that do, you will know that the VM_MAYSHARE flag
383 * must be set in the vma->vm_flags structure on noMMU
384 * Other flags can be set, and are documented in
385 * include/linux/mm.h
386 */
363df399 387 vma->vm_flags |= VM_MAYSHARE | VM_SHARED;
e9fa7c43
MH		 388
389 return 0;
390}
391
392int bfin_bf54x_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
393{
394 if (nocursor)
395 return 0;
396 else
397 return -EINVAL; /* just to force soft_cursor() call */
398}
399
400static int bfin_bf54x_fb_setcolreg(u_int regno, u_int red, u_int green,
401 u_int blue, u_int transp,
402 struct fb_info *info)
403{
404 if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
405 return -EINVAL;
406
407 if (info->var.grayscale) {
408 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
409 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
410 }
411
412 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
413
414 u32 value;
415 /* Place color in the pseudopalette */
416 if (regno > 16)
417 return -EINVAL;
418
419 red >>= (16 - info->var.red.length);
420 green >>= (16 - info->var.green.length);
421 blue >>= (16 - info->var.blue.length);
422
423 value = (red << info->var.red.offset) |
424 (green << info->var.green.offset) |
425 (blue << info->var.blue.offset);
426 value &= 0xFFFFFF;
427
428 ((u32 *) (info->pseudo_palette))[regno] = value;
429
430 }
431
432 return 0;
433}
434
435static struct fb_ops bfin_bf54x_fb_ops = {
436 .owner = THIS_MODULE,
437 .fb_open = bfin_bf54x_fb_open,
438 .fb_release = bfin_bf54x_fb_release,
439 .fb_check_var = bfin_bf54x_fb_check_var,
440 .fb_fillrect = cfb_fillrect,
441 .fb_copyarea = cfb_copyarea,
442 .fb_imageblit = cfb_imageblit,
443 .fb_mmap = bfin_bf54x_fb_mmap,
444 .fb_cursor = bfin_bf54x_fb_cursor,
445 .fb_setcolreg = bfin_bf54x_fb_setcolreg,
446};
447
448#ifndef NO_BL_SUPPORT
449static int bl_get_brightness(struct backlight_device *bd)
450{
451 return 0;
452}
453
454static struct backlight_ops bfin_lq043fb_bl_ops = {
455 .get_brightness = bl_get_brightness,
456};
457
458static struct backlight_device *bl_dev;
459
460static int bfin_lcd_get_power(struct lcd_device *dev)
461{
462 return 0;
463}
464
465static int bfin_lcd_set_power(struct lcd_device *dev, int power)
466{
467 return 0;
468}
469
470static int bfin_lcd_get_contrast(struct lcd_device *dev)
471{
472 return 0;
473}
474
475static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
476{
477
478 return 0;
479}
480
0c531360 481static int bfin_lcd_check_fb(struct lcd_device *dev, struct fb_info *fi)
e9fa7c43
MH		 482{
483 if (!fi || (fi == &bfin_bf54x_fb))
484 return 1;
485 return 0;
486}
487
488static struct lcd_ops bfin_lcd_ops = {
489 .get_power = bfin_lcd_get_power,
490 .set_power = bfin_lcd_set_power,
491 .get_contrast = bfin_lcd_get_contrast,
492 .set_contrast = bfin_lcd_set_contrast,
493 .check_fb = bfin_lcd_check_fb,
494};
495
496static struct lcd_device *lcd_dev;
497#endif
498
499static irqreturn_t bfin_bf54x_irq_error(int irq, void *dev_id)
500{
15aafa2f 501 /*struct bfin_bf54xfb_info *info = dev_id;*/
e9fa7c43
MH		 502
503 u16 status = bfin_read_EPPI0_STATUS();
504
505 bfin_write_EPPI0_STATUS(0xFFFF);
506
507 if (status) {
508 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
509 disable_dma(CH_EPPI0);
510
511 /* start dma */
512 enable_dma(CH_EPPI0);
513 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
514 bfin_write_EPPI0_STATUS(0xFFFF);
515 }
516
517 return IRQ_HANDLED;
518}
519
520static int __init bfin_bf54x_probe(struct platform_device *pdev)
521{
522 struct bfin_bf54xfb_info *info;
523 struct fb_info *fbinfo;
524 int ret;
525
526 printk(KERN_INFO DRIVER_NAME ": FrameBuffer initializing...\n");
527
528 if (request_dma(CH_EPPI0, "CH_EPPI0") < 0) {
529 printk(KERN_ERR DRIVER_NAME
530 ": couldn't request CH_EPPI0 DMA\n");
531 ret = -EFAULT;
532 goto out1;
533 }
534
535 fbinfo =
536 framebuffer_alloc(sizeof(struct bfin_bf54xfb_info), &pdev->dev);
537 if (!fbinfo) {
538 ret = -ENOMEM;
539 goto out2;
540 }
541
542 info = fbinfo->par;
543 info->fb = fbinfo;
544 info->dev = &pdev->dev;
545
546 platform_set_drvdata(pdev, fbinfo);
547
548 strcpy(fbinfo->fix.id, driver_name);
549
550 info->mach_info = pdev->dev.platform_data;
551
552 if (info->mach_info == NULL) {
553 dev_err(&pdev->dev,
554 "no platform data for lcd, cannot attach\n");
555 ret = -EINVAL;
556 goto out3;
557 }
558
559 fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
560 fbinfo->fix.type_aux = 0;
561 fbinfo->fix.xpanstep = 0;
562 fbinfo->fix.ypanstep = 0;
563 fbinfo->fix.ywrapstep = 0;
564 fbinfo->fix.accel = FB_ACCEL_NONE;
565 fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
566
567 fbinfo->var.nonstd = 0;
568 fbinfo->var.activate = FB_ACTIVATE_NOW;
569 fbinfo->var.height = info->mach_info->height;
570 fbinfo->var.width = info->mach_info->width;
571 fbinfo->var.accel_flags = 0;
572 fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
573
574 fbinfo->fbops = &bfin_bf54x_fb_ops;
575 fbinfo->flags = FBINFO_FLAG_DEFAULT;
576
577 fbinfo->var.xres = info->mach_info->xres.defval;
578 fbinfo->var.xres_virtual = info->mach_info->xres.defval;
579 fbinfo->var.yres = info->mach_info->yres.defval;
580 fbinfo->var.yres_virtual = info->mach_info->yres.defval;
581 fbinfo->var.bits_per_pixel = info->mach_info->bpp.defval;
582
583 fbinfo->var.upper_margin = 0;
584 fbinfo->var.lower_margin = 0;
585 fbinfo->var.vsync_len = 0;
586
587 fbinfo->var.left_margin = 0;
588 fbinfo->var.right_margin = 0;
589 fbinfo->var.hsync_len = 0;
590
591 fbinfo->var.red.offset = 16;
592 fbinfo->var.green.offset = 8;
593 fbinfo->var.blue.offset = 0;
594 fbinfo->var.transp.offset = 0;
595 fbinfo->var.red.length = 8;
596 fbinfo->var.green.length = 8;
597 fbinfo->var.blue.length = 8;
598 fbinfo->var.transp.length = 0;
599 fbinfo->fix.smem_len = info->mach_info->xres.max *
600 info->mach_info->yres.max * info->mach_info->bpp.max / 8;
601
602 fbinfo->fix.line_length = fbinfo->var.xres_virtual *
603 fbinfo->var.bits_per_pixel / 8;
604
605 info->fb_buffer =
606 dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
607 GFP_KERNEL);
608
609 if (NULL == info->fb_buffer) {
610 printk(KERN_ERR DRIVER_NAME
611 ": couldn't allocate dma buffer.\n");
612 ret = -ENOMEM;
613 goto out3;
614 }
615
616 memset(info->fb_buffer, 0, fbinfo->fix.smem_len);
617
618 fbinfo->screen_base = (void *)info->fb_buffer;
619 fbinfo->fix.smem_start = (int)info->fb_buffer;
620
621 fbinfo->fbops = &bfin_bf54x_fb_ops;
622
623 fbinfo->pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL);
624 if (!fbinfo->pseudo_palette) {
625 printk(KERN_ERR DRIVER_NAME
626 "Fail to allocate pseudo_palette\n");
627
628 ret = -ENOMEM;
629 goto out4;
630 }
631
632 memset(fbinfo->pseudo_palette, 0, sizeof(u32) * 16);
633
634 if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0)
635 < 0) {
636 printk(KERN_ERR DRIVER_NAME
637 "Fail to allocate colormap (%d entries)\n",
638 BFIN_LCD_NBR_PALETTE_ENTRIES);
639 ret = -EFAULT;
640 goto out5;
641 }
642
643 if (request_ports(info)) {
644 printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.\n");
645 ret = -EFAULT;
646 goto out6;
647 }
648
649 info->irq = platform_get_irq(pdev, 0);
650 if (info->irq < 0) {
651 ret = -EINVAL;
652 goto out7;
653 }
654
6002db82 655 if (request_irq(info->irq, bfin_bf54x_irq_error, IRQF_DISABLED,
e9fa7c43
MH		 656 "PPI ERROR", info) < 0) {
657 printk(KERN_ERR DRIVER_NAME
658 ": unable to request PPI ERROR IRQ\n");
659 ret = -EFAULT;
660 goto out7;
661 }
662
663 if (register_framebuffer(fbinfo) < 0) {
664 printk(KERN_ERR DRIVER_NAME
665 ": unable to register framebuffer.\n");
666 ret = -EINVAL;
667 goto out8;
668 }
669#ifndef NO_BL_SUPPORT
670 bl_dev =
671 backlight_device_register("bf54x-bl", NULL, NULL,
672 &bfin_lq043fb_bl_ops);
673 bl_dev->props.max_brightness = 255;
674
b3544ea9 675 lcd_dev = lcd_device_register(DRIVER_NAME, &pdev->dev, NULL, &bfin_lcd_ops);
e9fa7c43
MH		 676 lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.\n");
677#endif
678
679 return 0;
680
681out8:
682 free_irq(info->irq, info);
683out7:
684 free_ports(info);
685out6:
686 fb_dealloc_cmap(&fbinfo->cmap);
687out5:
688 kfree(fbinfo->pseudo_palette);
689out4:
690 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
691 info->dma_handle);
692out3:
693 framebuffer_release(fbinfo);
694out2:
695 free_dma(CH_EPPI0);
696out1:
697 platform_set_drvdata(pdev, NULL);
698
699 return ret;
700}
701
702static int bfin_bf54x_remove(struct platform_device *pdev)
703{
704
705 struct fb_info *fbinfo = platform_get_drvdata(pdev);
706 struct bfin_bf54xfb_info *info = fbinfo->par;
707
708 free_dma(CH_EPPI0);
709 free_irq(info->irq, info);
710
711 if (info->fb_buffer != NULL)
712 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
713 info->dma_handle);
714
715 kfree(fbinfo->pseudo_palette);
716 fb_dealloc_cmap(&fbinfo->cmap);
717
718#ifndef NO_BL_SUPPORT
719 lcd_device_unregister(lcd_dev);
720 backlight_device_unregister(bl_dev);
721#endif
722
723 unregister_framebuffer(fbinfo);
724
725 free_ports(info);
726
727 printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.\n");
728
729 return 0;
730}
731
732#ifdef CONFIG_PM
733static int bfin_bf54x_suspend(struct platform_device *pdev, pm_message_t state)
734{
735 struct fb_info *fbinfo = platform_get_drvdata(pdev);
e9fa7c43
MH		 736
737 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
738 disable_dma(CH_EPPI0);
739 bfin_write_EPPI0_STATUS(0xFFFF);
740
741 return 0;
742}
743
744static int bfin_bf54x_resume(struct platform_device *pdev)
745{
746 struct fb_info *fbinfo = platform_get_drvdata(pdev);
747 struct bfin_bf54xfb_info *info = fbinfo->par;
748
141d87e7
MH		 749 if (info->lq043_open_cnt) {
750
751 bfin_write_EPPI0_CONTROL(0);
752 SSYNC();
753
754 config_dma(info);
755 config_ppi(info);
756
757 /* start dma */
758 enable_dma(CH_EPPI0);
759 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
760 }
e9fa7c43
MH		 761
762 return 0;
763}
764#else
765#define bfin_bf54x_suspend NULL
766#define bfin_bf54x_resume NULL
767#endif
768
769static struct platform_driver bfin_bf54x_driver = {
770 .probe = bfin_bf54x_probe,
771 .remove = bfin_bf54x_remove,
772 .suspend = bfin_bf54x_suspend,
773 .resume = bfin_bf54x_resume,
774 .driver = {
775 .name = DRIVER_NAME,
776 .owner = THIS_MODULE,
777 },
778};
779
780static int __devinit bfin_bf54x_driver_init(void)
781{
782 return platform_driver_register(&bfin_bf54x_driver);
783}
784
785static void __exit bfin_bf54x_driver_cleanup(void)
786{
787 platform_driver_unregister(&bfin_bf54x_driver);
788}
789
790MODULE_DESCRIPTION("Blackfin BF54x TFT LCD Driver");
791MODULE_LICENSE("GPL");
792
793module_init(bfin_bf54x_driver_init);
794module_exit(bfin_bf54x_driver_cleanup);
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