blob: dc2f0047769ba83f39be09989e1134b62c17bf50 [file] [log] [blame]
Michael Henneriche9fa7c42007-10-16 01:29:38 -07001/*
2 * File: drivers/video/bf54x-lq043.c
3 * Based on:
4 * Author: Michael Hennerich <hennerich@blackfin.uclinux.org>
5 *
6 * Created:
Paul Bolle90802ed2011-12-05 13:00:34 +01007 * Description: ADSP-BF54x Framebuffer driver
Michael Henneriche9fa7c42007-10-16 01:29:38 -07008 *
9 *
10 * Modified:
Michael Hennerich5e9e4ad2008-03-10 11:44:03 -070011 * Copyright 2007-2008 Analog Devices Inc.
Michael Henneriche9fa7c42007-10-16 01:29:38 -070012 *
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
Bryan Wu639f6572008-08-27 10:51:02 +080061#include <mach/bf54x-lq043.h>
Michael Henneriche9fa7c42007-10-16 01:29:38 -070062
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;
Michael Henneriche9fa7c42007-10-16 01:29:38 -070085 int lq043_open_cnt;
86 int irq;
87 spinlock_t lock; /* lock */
88};
89
90static int nocursor;
91module_param(nocursor, int, 0644);
92MODULE_PARM_DESC(nocursor, "cursor enable/disable");
93
94static int outp_rgb666;
95module_param(outp_rgb666, int, 0);
96MODULE_PARM_DESC(outp_rgb666, "Output 18-bit RGB666");
97
98#define LCD_X_RES 480 /*Horizontal Resolution */
99#define LCD_Y_RES 272 /* Vertical Resolution */
100
101#define LCD_BPP 24 /* Bit Per Pixel */
102#define DMA_BUS_SIZE 32
103
104/* -- Horizontal synchronizing --
105 *
106 * Timing characteristics taken from the SHARP LQ043T1DG01 datasheet
107 * (LCY-W-06602A Page 9 of 22)
108 *
109 * Clock Frequency 1/Tc Min 7.83 Typ 9.00 Max 9.26 MHz
110 *
111 * Period TH - 525 - Clock
112 * Pulse width THp - 41 - Clock
113 * Horizontal period THd - 480 - Clock
114 * Back porch THb - 2 - Clock
115 * Front porch THf - 2 - Clock
116 *
117 * -- Vertical synchronizing --
118 * Period TV - 286 - Line
119 * Pulse width TVp - 10 - Line
120 * Vertical period TVd - 272 - Line
121 * Back porch TVb - 2 - Line
122 * Front porch TVf - 2 - Line
123 */
124
125#define LCD_CLK (8*1000*1000) /* 8MHz */
126
127/* # active data to transfer after Horizontal Delay clock */
128#define EPPI_HCOUNT LCD_X_RES
129
130/* # active lines to transfer after Vertical Delay clock */
131#define EPPI_VCOUNT LCD_Y_RES
132
133/* Samples per Line = 480 (active data) + 45 (padding) */
134#define EPPI_LINE 525
135
136/* Lines per Frame = 272 (active data) + 14 (padding) */
137#define EPPI_FRAME 286
138
139/* FS1 (Hsync) Width (Typical)*/
140#define EPPI_FS1W_HBL 41
141
142/* FS1 (Hsync) Period (Typical) */
143#define EPPI_FS1P_AVPL EPPI_LINE
144
145/* Horizontal Delay clock after assertion of Hsync (Typical) */
146#define EPPI_HDELAY 43
147
148/* FS2 (Vsync) Width = FS1 (Hsync) Period * 10 */
149#define EPPI_FS2W_LVB (EPPI_LINE * 10)
150
151 /* FS2 (Vsync) Period = FS1 (Hsync) Period * Lines per Frame */
152#define EPPI_FS2P_LAVF (EPPI_LINE * EPPI_FRAME)
153
154/* Vertical Delay after assertion of Vsync (2 Lines) */
155#define EPPI_VDELAY 12
156
157#define EPPI_CLIP 0xFF00FF00
158
159/* EPPI Control register configuration value for RGB out
160 * - EPPI as Output
161 * GP 2 frame sync mode,
162 * Internal Clock generation disabled, Internal FS generation enabled,
163 * Receives samples on EPPI_CLK raising edge, Transmits samples on EPPI_CLK falling edge,
164 * FS1 & FS2 are active high,
165 * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out)
166 * DMA Unpacking disabled when RGB Formating is enabled, otherwise DMA unpacking enabled
167 * Swapping Enabled,
168 * One (DMA) Channel Mode,
169 * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output
170 * Regular watermark - when FIFO is 100% full,
171 * Urgent watermark - when FIFO is 75% full
172 */
173
174#define EPPI_CONTROL (0x20136E2E | SWAPEN)
175
176static inline u16 get_eppi_clkdiv(u32 target_ppi_clk)
177{
178 u32 sclk = get_sclk();
179
180 /* EPPI_CLK = (SCLK) / (2 * (EPPI_CLKDIV[15:0] + 1)) */
181
182 return (((sclk / target_ppi_clk) / 2) - 1);
183}
184
185static void config_ppi(struct bfin_bf54xfb_info *fbi)
186{
187
188 u16 eppi_clkdiv = get_eppi_clkdiv(LCD_CLK);
189
190 bfin_write_EPPI0_FS1W_HBL(EPPI_FS1W_HBL);
191 bfin_write_EPPI0_FS1P_AVPL(EPPI_FS1P_AVPL);
192 bfin_write_EPPI0_FS2W_LVB(EPPI_FS2W_LVB);
193 bfin_write_EPPI0_FS2P_LAVF(EPPI_FS2P_LAVF);
194 bfin_write_EPPI0_CLIP(EPPI_CLIP);
195
196 bfin_write_EPPI0_FRAME(EPPI_FRAME);
197 bfin_write_EPPI0_LINE(EPPI_LINE);
198
199 bfin_write_EPPI0_HCOUNT(EPPI_HCOUNT);
200 bfin_write_EPPI0_HDELAY(EPPI_HDELAY);
201 bfin_write_EPPI0_VCOUNT(EPPI_VCOUNT);
202 bfin_write_EPPI0_VDELAY(EPPI_VDELAY);
203
204 bfin_write_EPPI0_CLKDIV(eppi_clkdiv);
205
206/*
207 * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out)
208 * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output
209 */
210 if (outp_rgb666)
211 bfin_write_EPPI0_CONTROL((EPPI_CONTROL & ~DLENGTH) | DLEN_18 |
212 RGB_FMT_EN);
213 else
214 bfin_write_EPPI0_CONTROL(((EPPI_CONTROL & ~DLENGTH) | DLEN_24) &
215 ~RGB_FMT_EN);
216
217
218}
219
220static int config_dma(struct bfin_bf54xfb_info *fbi)
221{
222
223 set_dma_config(CH_EPPI0,
224 set_bfin_dma_config(DIR_READ, DMA_FLOW_AUTO,
225 INTR_DISABLE, DIMENSION_2D,
Michael Hennerich2047e402008-01-22 15:29:18 +0800226 DATA_SIZE_32,
227 DMA_NOSYNC_KEEP_DMA_BUF));
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700228 set_dma_x_count(CH_EPPI0, (LCD_X_RES * LCD_BPP) / DMA_BUS_SIZE);
229 set_dma_x_modify(CH_EPPI0, DMA_BUS_SIZE / 8);
230 set_dma_y_count(CH_EPPI0, LCD_Y_RES);
231 set_dma_y_modify(CH_EPPI0, DMA_BUS_SIZE / 8);
232 set_dma_start_addr(CH_EPPI0, (unsigned long)fbi->fb_buffer);
233
234 return 0;
235}
236
237static int request_ports(struct bfin_bf54xfb_info *fbi)
238{
239
240 u16 eppi_req_18[] = EPPI0_18;
241 u16 disp = fbi->mach_info->disp;
242
Jingoo Hanf8bd4932012-01-26 19:32:34 +0900243 if (gpio_request_one(disp, GPIOF_OUT_INIT_HIGH, DRIVER_NAME)) {
Paul Bolle426d3102010-08-07 12:30:03 +0200244 printk(KERN_ERR "Requesting GPIO %d failed\n", disp);
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700245 return -EFAULT;
246 }
247
248 if (peripheral_request_list(eppi_req_18, DRIVER_NAME)) {
Paul Bolle426d3102010-08-07 12:30:03 +0200249 printk(KERN_ERR "Requesting Peripherals failed\n");
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700250 gpio_free(disp);
251 return -EFAULT;
252 }
253
254 if (!outp_rgb666) {
255
256 u16 eppi_req_24[] = EPPI0_24;
257
258 if (peripheral_request_list(eppi_req_24, DRIVER_NAME)) {
Paul Bolle426d3102010-08-07 12:30:03 +0200259 printk(KERN_ERR "Requesting Peripherals failed\n");
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700260 peripheral_free_list(eppi_req_18);
261 gpio_free(disp);
262 return -EFAULT;
263 }
264 }
265
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700266 return 0;
267}
268
269static void free_ports(struct bfin_bf54xfb_info *fbi)
270{
271
272 u16 eppi_req_18[] = EPPI0_18;
273
274 gpio_free(fbi->mach_info->disp);
275
276 peripheral_free_list(eppi_req_18);
277
278 if (!outp_rgb666) {
279 u16 eppi_req_24[] = EPPI0_24;
280 peripheral_free_list(eppi_req_24);
281 }
282}
283
284static int bfin_bf54x_fb_open(struct fb_info *info, int user)
285{
286 struct bfin_bf54xfb_info *fbi = info->par;
287
288 spin_lock(&fbi->lock);
289 fbi->lq043_open_cnt++;
290
291 if (fbi->lq043_open_cnt <= 1) {
292
293 bfin_write_EPPI0_CONTROL(0);
294 SSYNC();
295
296 config_dma(fbi);
297 config_ppi(fbi);
298
299 /* start dma */
300 enable_dma(CH_EPPI0);
301 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
302 }
303
304 spin_unlock(&fbi->lock);
305
306 return 0;
307}
308
309static int bfin_bf54x_fb_release(struct fb_info *info, int user)
310{
311 struct bfin_bf54xfb_info *fbi = info->par;
312
313 spin_lock(&fbi->lock);
314
315 fbi->lq043_open_cnt--;
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700316
317 if (fbi->lq043_open_cnt <= 0) {
318
319 bfin_write_EPPI0_CONTROL(0);
320 SSYNC();
321 disable_dma(CH_EPPI0);
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700322 }
323
324 spin_unlock(&fbi->lock);
325
326 return 0;
327}
328
329static int bfin_bf54x_fb_check_var(struct fb_var_screeninfo *var,
330 struct fb_info *info)
331{
332
Michael Hennerichb46578e2009-01-15 13:50:46 -0800333 switch (var->bits_per_pixel) {
334 case 24:/* TRUECOLOUR, 16m */
335 var->red.offset = 16;
336 var->green.offset = 8;
337 var->blue.offset = 0;
338 var->red.length = var->green.length = var->blue.length = 8;
339 var->transp.offset = 0;
340 var->transp.length = 0;
341 var->transp.msb_right = 0;
342 var->red.msb_right = 0;
343 var->green.msb_right = 0;
344 var->blue.msb_right = 0;
345 break;
346 default:
Harvey Harrison5ae12172008-04-28 02:15:47 -0700347 pr_debug("%s: depth not supported: %u BPP\n", __func__,
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700348 var->bits_per_pixel);
349 return -EINVAL;
350 }
351
352 if (info->var.xres != var->xres || info->var.yres != var->yres ||
353 info->var.xres_virtual != var->xres_virtual ||
354 info->var.yres_virtual != var->yres_virtual) {
355 pr_debug("%s: Resolution not supported: X%u x Y%u \n",
Harvey Harrison5ae12172008-04-28 02:15:47 -0700356 __func__, var->xres, var->yres);
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700357 return -EINVAL;
358 }
359
360 /*
361 * Memory limit
362 */
363
364 if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
365 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
Harvey Harrison5ae12172008-04-28 02:15:47 -0700366 __func__, var->yres_virtual);
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700367 return -ENOMEM;
368 }
369
370 return 0;
371}
372
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700373int bfin_bf54x_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
374{
375 if (nocursor)
376 return 0;
377 else
378 return -EINVAL; /* just to force soft_cursor() call */
379}
380
381static int bfin_bf54x_fb_setcolreg(u_int regno, u_int red, u_int green,
382 u_int blue, u_int transp,
383 struct fb_info *info)
384{
385 if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
386 return -EINVAL;
387
388 if (info->var.grayscale) {
389 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
390 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
391 }
392
393 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
394
395 u32 value;
396 /* Place color in the pseudopalette */
397 if (regno > 16)
398 return -EINVAL;
399
400 red >>= (16 - info->var.red.length);
401 green >>= (16 - info->var.green.length);
402 blue >>= (16 - info->var.blue.length);
403
404 value = (red << info->var.red.offset) |
405 (green << info->var.green.offset) |
406 (blue << info->var.blue.offset);
407 value &= 0xFFFFFF;
408
409 ((u32 *) (info->pseudo_palette))[regno] = value;
410
411 }
412
413 return 0;
414}
415
416static struct fb_ops bfin_bf54x_fb_ops = {
417 .owner = THIS_MODULE,
418 .fb_open = bfin_bf54x_fb_open,
419 .fb_release = bfin_bf54x_fb_release,
420 .fb_check_var = bfin_bf54x_fb_check_var,
421 .fb_fillrect = cfb_fillrect,
422 .fb_copyarea = cfb_copyarea,
423 .fb_imageblit = cfb_imageblit,
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700424 .fb_cursor = bfin_bf54x_fb_cursor,
425 .fb_setcolreg = bfin_bf54x_fb_setcolreg,
426};
427
428#ifndef NO_BL_SUPPORT
429static int bl_get_brightness(struct backlight_device *bd)
430{
431 return 0;
432}
433
Bruno Prémontfa11de02010-02-26 13:04:54 +0100434static const struct backlight_ops bfin_lq043fb_bl_ops = {
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700435 .get_brightness = bl_get_brightness,
436};
437
438static struct backlight_device *bl_dev;
439
440static int bfin_lcd_get_power(struct lcd_device *dev)
441{
442 return 0;
443}
444
445static int bfin_lcd_set_power(struct lcd_device *dev, int power)
446{
447 return 0;
448}
449
450static int bfin_lcd_get_contrast(struct lcd_device *dev)
451{
452 return 0;
453}
454
455static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
456{
457
458 return 0;
459}
460
Ben Dooks0c531362008-07-23 21:31:38 -0700461static int bfin_lcd_check_fb(struct lcd_device *dev, struct fb_info *fi)
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700462{
463 if (!fi || (fi == &bfin_bf54x_fb))
464 return 1;
465 return 0;
466}
467
468static struct lcd_ops bfin_lcd_ops = {
469 .get_power = bfin_lcd_get_power,
470 .set_power = bfin_lcd_set_power,
471 .get_contrast = bfin_lcd_get_contrast,
472 .set_contrast = bfin_lcd_set_contrast,
473 .check_fb = bfin_lcd_check_fb,
474};
475
476static struct lcd_device *lcd_dev;
477#endif
478
479static irqreturn_t bfin_bf54x_irq_error(int irq, void *dev_id)
480{
Jeff Garzik15aafa22008-02-06 01:36:20 -0800481 /*struct bfin_bf54xfb_info *info = dev_id;*/
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700482
483 u16 status = bfin_read_EPPI0_STATUS();
484
485 bfin_write_EPPI0_STATUS(0xFFFF);
486
487 if (status) {
488 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
489 disable_dma(CH_EPPI0);
490
491 /* start dma */
492 enable_dma(CH_EPPI0);
493 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
494 bfin_write_EPPI0_STATUS(0xFFFF);
495 }
496
497 return IRQ_HANDLED;
498}
499
Mike Frysinger8f09d742009-06-16 15:34:42 -0700500static int __devinit bfin_bf54x_probe(struct platform_device *pdev)
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700501{
Mike Frysinger8fc809d2010-05-26 14:42:31 -0700502#ifndef NO_BL_SUPPORT
Matthew Garretta19a6ee2010-02-17 16:39:44 -0500503 struct backlight_properties props;
Mike Frysinger8fc809d2010-05-26 14:42:31 -0700504#endif
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700505 struct bfin_bf54xfb_info *info;
506 struct fb_info *fbinfo;
507 int ret;
508
509 printk(KERN_INFO DRIVER_NAME ": FrameBuffer initializing...\n");
510
511 if (request_dma(CH_EPPI0, "CH_EPPI0") < 0) {
512 printk(KERN_ERR DRIVER_NAME
513 ": couldn't request CH_EPPI0 DMA\n");
514 ret = -EFAULT;
515 goto out1;
516 }
517
518 fbinfo =
519 framebuffer_alloc(sizeof(struct bfin_bf54xfb_info), &pdev->dev);
520 if (!fbinfo) {
521 ret = -ENOMEM;
522 goto out2;
523 }
524
525 info = fbinfo->par;
526 info->fb = fbinfo;
527 info->dev = &pdev->dev;
528
529 platform_set_drvdata(pdev, fbinfo);
530
531 strcpy(fbinfo->fix.id, driver_name);
532
533 info->mach_info = pdev->dev.platform_data;
534
535 if (info->mach_info == NULL) {
536 dev_err(&pdev->dev,
537 "no platform data for lcd, cannot attach\n");
538 ret = -EINVAL;
539 goto out3;
540 }
541
542 fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
543 fbinfo->fix.type_aux = 0;
544 fbinfo->fix.xpanstep = 0;
545 fbinfo->fix.ypanstep = 0;
546 fbinfo->fix.ywrapstep = 0;
547 fbinfo->fix.accel = FB_ACCEL_NONE;
548 fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
549
550 fbinfo->var.nonstd = 0;
551 fbinfo->var.activate = FB_ACTIVATE_NOW;
552 fbinfo->var.height = info->mach_info->height;
553 fbinfo->var.width = info->mach_info->width;
554 fbinfo->var.accel_flags = 0;
555 fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
556
557 fbinfo->fbops = &bfin_bf54x_fb_ops;
558 fbinfo->flags = FBINFO_FLAG_DEFAULT;
559
560 fbinfo->var.xres = info->mach_info->xres.defval;
561 fbinfo->var.xres_virtual = info->mach_info->xres.defval;
562 fbinfo->var.yres = info->mach_info->yres.defval;
563 fbinfo->var.yres_virtual = info->mach_info->yres.defval;
564 fbinfo->var.bits_per_pixel = info->mach_info->bpp.defval;
565
566 fbinfo->var.upper_margin = 0;
567 fbinfo->var.lower_margin = 0;
568 fbinfo->var.vsync_len = 0;
569
570 fbinfo->var.left_margin = 0;
571 fbinfo->var.right_margin = 0;
572 fbinfo->var.hsync_len = 0;
573
574 fbinfo->var.red.offset = 16;
575 fbinfo->var.green.offset = 8;
576 fbinfo->var.blue.offset = 0;
577 fbinfo->var.transp.offset = 0;
578 fbinfo->var.red.length = 8;
579 fbinfo->var.green.length = 8;
580 fbinfo->var.blue.length = 8;
581 fbinfo->var.transp.length = 0;
582 fbinfo->fix.smem_len = info->mach_info->xres.max *
583 info->mach_info->yres.max * info->mach_info->bpp.max / 8;
584
585 fbinfo->fix.line_length = fbinfo->var.xres_virtual *
586 fbinfo->var.bits_per_pixel / 8;
587
588 info->fb_buffer =
589 dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
590 GFP_KERNEL);
591
592 if (NULL == info->fb_buffer) {
593 printk(KERN_ERR DRIVER_NAME
594 ": couldn't allocate dma buffer.\n");
595 ret = -ENOMEM;
596 goto out3;
597 }
598
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700599 fbinfo->screen_base = (void *)info->fb_buffer;
600 fbinfo->fix.smem_start = (int)info->fb_buffer;
601
602 fbinfo->fbops = &bfin_bf54x_fb_ops;
603
Mike Frysingera34601c2009-06-16 15:34:43 -0700604 fbinfo->pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL);
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700605 if (!fbinfo->pseudo_palette) {
606 printk(KERN_ERR DRIVER_NAME
607 "Fail to allocate pseudo_palette\n");
608
609 ret = -ENOMEM;
610 goto out4;
611 }
612
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700613 if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0)
614 < 0) {
615 printk(KERN_ERR DRIVER_NAME
616 "Fail to allocate colormap (%d entries)\n",
617 BFIN_LCD_NBR_PALETTE_ENTRIES);
618 ret = -EFAULT;
619 goto out5;
620 }
621
622 if (request_ports(info)) {
623 printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.\n");
624 ret = -EFAULT;
625 goto out6;
626 }
627
628 info->irq = platform_get_irq(pdev, 0);
629 if (info->irq < 0) {
630 ret = -EINVAL;
631 goto out7;
632 }
633
Yong Zhangf8798cc2011-09-22 16:59:16 +0800634 if (request_irq(info->irq, bfin_bf54x_irq_error, 0,
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700635 "PPI ERROR", info) < 0) {
636 printk(KERN_ERR DRIVER_NAME
637 ": unable to request PPI ERROR IRQ\n");
638 ret = -EFAULT;
639 goto out7;
640 }
641
642 if (register_framebuffer(fbinfo) < 0) {
643 printk(KERN_ERR DRIVER_NAME
644 ": unable to register framebuffer.\n");
645 ret = -EINVAL;
646 goto out8;
647 }
648#ifndef NO_BL_SUPPORT
Matthew Garretta19a6ee2010-02-17 16:39:44 -0500649 memset(&props, 0, sizeof(struct backlight_properties));
Matthew Garrettbb7ca742011-03-22 16:30:21 -0700650 props.type = BACKLIGHT_RAW;
Matthew Garretta19a6ee2010-02-17 16:39:44 -0500651 props.max_brightness = 255;
652 bl_dev = backlight_device_register("bf54x-bl", NULL, NULL,
653 &bfin_lq043fb_bl_ops, &props);
Bruno Prémontfa11de02010-02-26 13:04:54 +0100654 if (IS_ERR(bl_dev)) {
655 printk(KERN_ERR DRIVER_NAME
656 ": unable to register backlight.\n");
657 ret = -EINVAL;
Mike Frysinger8fc809d2010-05-26 14:42:31 -0700658 unregister_framebuffer(fbinfo);
659 goto out8;
Bruno Prémontfa11de02010-02-26 13:04:54 +0100660 }
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700661
Bryan Wub3544ea2008-03-10 11:44:03 -0700662 lcd_dev = lcd_device_register(DRIVER_NAME, &pdev->dev, NULL, &bfin_lcd_ops);
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700663 lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.\n");
664#endif
665
666 return 0;
667
668out8:
669 free_irq(info->irq, info);
670out7:
671 free_ports(info);
672out6:
673 fb_dealloc_cmap(&fbinfo->cmap);
674out5:
675 kfree(fbinfo->pseudo_palette);
676out4:
677 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
678 info->dma_handle);
679out3:
680 framebuffer_release(fbinfo);
681out2:
682 free_dma(CH_EPPI0);
683out1:
684 platform_set_drvdata(pdev, NULL);
685
686 return ret;
687}
688
Mike Frysinger8f09d742009-06-16 15:34:42 -0700689static int __devexit bfin_bf54x_remove(struct platform_device *pdev)
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700690{
691
692 struct fb_info *fbinfo = platform_get_drvdata(pdev);
693 struct bfin_bf54xfb_info *info = fbinfo->par;
694
695 free_dma(CH_EPPI0);
696 free_irq(info->irq, info);
697
698 if (info->fb_buffer != NULL)
699 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
700 info->dma_handle);
701
702 kfree(fbinfo->pseudo_palette);
703 fb_dealloc_cmap(&fbinfo->cmap);
704
705#ifndef NO_BL_SUPPORT
706 lcd_device_unregister(lcd_dev);
707 backlight_device_unregister(bl_dev);
708#endif
709
710 unregister_framebuffer(fbinfo);
711
712 free_ports(info);
713
714 printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.\n");
715
716 return 0;
717}
718
719#ifdef CONFIG_PM
720static int bfin_bf54x_suspend(struct platform_device *pdev, pm_message_t state)
721{
722 struct fb_info *fbinfo = platform_get_drvdata(pdev);
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700723
724 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
725 disable_dma(CH_EPPI0);
726 bfin_write_EPPI0_STATUS(0xFFFF);
727
728 return 0;
729}
730
731static int bfin_bf54x_resume(struct platform_device *pdev)
732{
733 struct fb_info *fbinfo = platform_get_drvdata(pdev);
734 struct bfin_bf54xfb_info *info = fbinfo->par;
735
Michael Hennerich141d87e2008-08-20 14:09:16 -0700736 if (info->lq043_open_cnt) {
737
738 bfin_write_EPPI0_CONTROL(0);
739 SSYNC();
740
741 config_dma(info);
742 config_ppi(info);
743
744 /* start dma */
745 enable_dma(CH_EPPI0);
746 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
747 }
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700748
749 return 0;
750}
751#else
752#define bfin_bf54x_suspend NULL
753#define bfin_bf54x_resume NULL
754#endif
755
756static struct platform_driver bfin_bf54x_driver = {
757 .probe = bfin_bf54x_probe,
Mike Frysinger8f09d742009-06-16 15:34:42 -0700758 .remove = __devexit_p(bfin_bf54x_remove),
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700759 .suspend = bfin_bf54x_suspend,
760 .resume = bfin_bf54x_resume,
761 .driver = {
762 .name = DRIVER_NAME,
763 .owner = THIS_MODULE,
764 },
765};
766
Mike Frysinger8f09d742009-06-16 15:34:42 -0700767static int __init bfin_bf54x_driver_init(void)
Michael Henneriche9fa7c42007-10-16 01:29:38 -0700768{
769 return platform_driver_register(&bfin_bf54x_driver);
770}
771
772static void __exit bfin_bf54x_driver_cleanup(void)
773{
774 platform_driver_unregister(&bfin_bf54x_driver);
775}
776
777MODULE_DESCRIPTION("Blackfin BF54x TFT LCD Driver");
778MODULE_LICENSE("GPL");
779
780module_init(bfin_bf54x_driver_init);
781module_exit(bfin_bf54x_driver_cleanup);