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treewide: Fix comment and string typo 'bufer'
[linux-block.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:
90802ed9 7 * Description: ADSP-BF54x Framebuffer driver
e9fa7c43
MH		 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
639f6571 61#include <mach/bf54x-lq043.h>
e9fa7c43
MH		 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;
e9fa7c43
MH		 85 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,
2047e40d
MH		 226 DATA_SIZE_32,
227 DMA_NOSYNC_KEEP_DMA_BUF));
e9fa7c43
MH		 228 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
fdcc5358 243 if (gpio_request(disp, DRIVER_NAME)) {
426d3107 244 printk(KERN_ERR "Requesting GPIO %d failed\n", disp);
e9fa7c43
MH		 245 return -EFAULT;
246 }
247
248 if (peripheral_request_list(eppi_req_18, DRIVER_NAME)) {
426d3107 249 printk(KERN_ERR "Requesting Peripherals failed\n");
e9fa7c43
MH		 250 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)) {
426d3107 259 printk(KERN_ERR "Requesting Peripherals failed\n");
e9fa7c43
MH		 260 peripheral_free_list(eppi_req_18);
261 gpio_free(disp);
262 return -EFAULT;
263 }
264 }
265
acbcd263 266 gpio_direction_output(disp, 1);
e9fa7c43
MH		 267
268 return 0;
269}
270
271static void free_ports(struct bfin_bf54xfb_info *fbi)
272{
273
274 u16 eppi_req_18[] = EPPI0_18;
275
276 gpio_free(fbi->mach_info->disp);
277
278 peripheral_free_list(eppi_req_18);
279
280 if (!outp_rgb666) {
281 u16 eppi_req_24[] = EPPI0_24;
282 peripheral_free_list(eppi_req_24);
283 }
284}
285
286static int bfin_bf54x_fb_open(struct fb_info *info, int user)
287{
288 struct bfin_bf54xfb_info *fbi = info->par;
289
290 spin_lock(&fbi->lock);
291 fbi->lq043_open_cnt++;
292
293 if (fbi->lq043_open_cnt <= 1) {
294
295 bfin_write_EPPI0_CONTROL(0);
296 SSYNC();
297
298 config_dma(fbi);
299 config_ppi(fbi);
300
301 /* start dma */
302 enable_dma(CH_EPPI0);
303 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
304 }
305
306 spin_unlock(&fbi->lock);
307
308 return 0;
309}
310
311static int bfin_bf54x_fb_release(struct fb_info *info, int user)
312{
313 struct bfin_bf54xfb_info *fbi = info->par;
314
315 spin_lock(&fbi->lock);
316
317 fbi->lq043_open_cnt--;
e9fa7c43
MH		 318
319 if (fbi->lq043_open_cnt <= 0) {
320
321 bfin_write_EPPI0_CONTROL(0);
322 SSYNC();
323 disable_dma(CH_EPPI0);
e9fa7c43
MH		 324 }
325
326 spin_unlock(&fbi->lock);
327
328 return 0;
329}
330
331static int bfin_bf54x_fb_check_var(struct fb_var_screeninfo *var,
332 struct fb_info *info)
333{
334
b46578ed
MH		 335 switch (var->bits_per_pixel) {
336 case 24:/* TRUECOLOUR, 16m */
337 var->red.offset = 16;
338 var->green.offset = 8;
339 var->blue.offset = 0;
340 var->red.length = var->green.length = var->blue.length = 8;
341 var->transp.offset = 0;
342 var->transp.length = 0;
343 var->transp.msb_right = 0;
344 var->red.msb_right = 0;
345 var->green.msb_right = 0;
346 var->blue.msb_right = 0;
347 break;
348 default:
5ae12170 349 pr_debug("%s: depth not supported: %u BPP\n", __func__,
e9fa7c43
MH		 350 var->bits_per_pixel);
351 return -EINVAL;
352 }
353
354 if (info->var.xres != var->xres || info->var.yres != var->yres ||
355 info->var.xres_virtual != var->xres_virtual ||
356 info->var.yres_virtual != var->yres_virtual) {
357 pr_debug("%s: Resolution not supported: X%u x Y%u \n",
5ae12170 358 __func__, var->xres, var->yres);
e9fa7c43
MH		 359 return -EINVAL;
360 }
361
362 /*
363 * Memory limit
364 */
365
366 if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
367 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
5ae12170 368 __func__, var->yres_virtual);
e9fa7c43
MH		 369 return -ENOMEM;
370 }
371
372 return 0;
373}
374
e9fa7c43
MH		 375int bfin_bf54x_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
376{
377 if (nocursor)
378 return 0;
379 else
380 return -EINVAL; /* just to force soft_cursor() call */
381}
382
383static int bfin_bf54x_fb_setcolreg(u_int regno, u_int red, u_int green,
384 u_int blue, u_int transp,
385 struct fb_info *info)
386{
387 if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
388 return -EINVAL;
389
390 if (info->var.grayscale) {
391 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
392 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
393 }
394
395 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
396
397 u32 value;
398 /* Place color in the pseudopalette */
399 if (regno > 16)
400 return -EINVAL;
401
402 red >>= (16 - info->var.red.length);
403 green >>= (16 - info->var.green.length);
404 blue >>= (16 - info->var.blue.length);
405
406 value = (red << info->var.red.offset) |
407 (green << info->var.green.offset) |
408 (blue << info->var.blue.offset);
409 value &= 0xFFFFFF;
410
411 ((u32 *) (info->pseudo_palette))[regno] = value;
412
413 }
414
415 return 0;
416}
417
418static struct fb_ops bfin_bf54x_fb_ops = {
419 .owner = THIS_MODULE,
420 .fb_open = bfin_bf54x_fb_open,
421 .fb_release = bfin_bf54x_fb_release,
422 .fb_check_var = bfin_bf54x_fb_check_var,
423 .fb_fillrect = cfb_fillrect,
424 .fb_copyarea = cfb_copyarea,
425 .fb_imageblit = cfb_imageblit,
e9fa7c43
MH		 426 .fb_cursor = bfin_bf54x_fb_cursor,
427 .fb_setcolreg = bfin_bf54x_fb_setcolreg,
428};
429
430#ifndef NO_BL_SUPPORT
431static int bl_get_brightness(struct backlight_device *bd)
432{
433 return 0;
434}
435
fa11de0a 436static const struct backlight_ops bfin_lq043fb_bl_ops = {
e9fa7c43
MH		 437 .get_brightness = bl_get_brightness,
438};
439
440static struct backlight_device *bl_dev;
441
442static int bfin_lcd_get_power(struct lcd_device *dev)
443{
444 return 0;
445}
446
447static int bfin_lcd_set_power(struct lcd_device *dev, int power)
448{
449 return 0;
450}
451
452static int bfin_lcd_get_contrast(struct lcd_device *dev)
453{
454 return 0;
455}
456
457static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
458{
459
460 return 0;
461}
462
0c531360 463static int bfin_lcd_check_fb(struct lcd_device *dev, struct fb_info *fi)
e9fa7c43
MH		 464{
465 if (!fi || (fi == &bfin_bf54x_fb))
466 return 1;
467 return 0;
468}
469
470static struct lcd_ops bfin_lcd_ops = {
471 .get_power = bfin_lcd_get_power,
472 .set_power = bfin_lcd_set_power,
473 .get_contrast = bfin_lcd_get_contrast,
474 .set_contrast = bfin_lcd_set_contrast,
475 .check_fb = bfin_lcd_check_fb,
476};
477
478static struct lcd_device *lcd_dev;
479#endif
480
481static irqreturn_t bfin_bf54x_irq_error(int irq, void *dev_id)
482{
15aafa2f 483 /*struct bfin_bf54xfb_info *info = dev_id;*/
e9fa7c43
MH		 484
485 u16 status = bfin_read_EPPI0_STATUS();
486
487 bfin_write_EPPI0_STATUS(0xFFFF);
488
489 if (status) {
490 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
491 disable_dma(CH_EPPI0);
492
493 /* start dma */
494 enable_dma(CH_EPPI0);
495 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
496 bfin_write_EPPI0_STATUS(0xFFFF);
497 }
498
499 return IRQ_HANDLED;
500}
501
8f09d74a 502static int __devinit bfin_bf54x_probe(struct platform_device *pdev)
e9fa7c43 503{
8fc809d1 504#ifndef NO_BL_SUPPORT
a19a6ee6 505 struct backlight_properties props;
8fc809d1 506#endif
e9fa7c43
MH		 507 struct bfin_bf54xfb_info *info;
508 struct fb_info *fbinfo;
509 int ret;
510
511 printk(KERN_INFO DRIVER_NAME ": FrameBuffer initializing...\n");
512
513 if (request_dma(CH_EPPI0, "CH_EPPI0") < 0) {
514 printk(KERN_ERR DRIVER_NAME
515 ": couldn't request CH_EPPI0 DMA\n");
516 ret = -EFAULT;
517 goto out1;
518 }
519
520 fbinfo =
521 framebuffer_alloc(sizeof(struct bfin_bf54xfb_info), &pdev->dev);
522 if (!fbinfo) {
523 ret = -ENOMEM;
524 goto out2;
525 }
526
527 info = fbinfo->par;
528 info->fb = fbinfo;
529 info->dev = &pdev->dev;
530
531 platform_set_drvdata(pdev, fbinfo);
532
533 strcpy(fbinfo->fix.id, driver_name);
534
535 info->mach_info = pdev->dev.platform_data;
536
537 if (info->mach_info == NULL) {
538 dev_err(&pdev->dev,
539 "no platform data for lcd, cannot attach\n");
540 ret = -EINVAL;
541 goto out3;
542 }
543
544 fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
545 fbinfo->fix.type_aux = 0;
546 fbinfo->fix.xpanstep = 0;
547 fbinfo->fix.ypanstep = 0;
548 fbinfo->fix.ywrapstep = 0;
549 fbinfo->fix.accel = FB_ACCEL_NONE;
550 fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
551
552 fbinfo->var.nonstd = 0;
553 fbinfo->var.activate = FB_ACTIVATE_NOW;
554 fbinfo->var.height = info->mach_info->height;
555 fbinfo->var.width = info->mach_info->width;
556 fbinfo->var.accel_flags = 0;
557 fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
558
559 fbinfo->fbops = &bfin_bf54x_fb_ops;
560 fbinfo->flags = FBINFO_FLAG_DEFAULT;
561
562 fbinfo->var.xres = info->mach_info->xres.defval;
563 fbinfo->var.xres_virtual = info->mach_info->xres.defval;
564 fbinfo->var.yres = info->mach_info->yres.defval;
565 fbinfo->var.yres_virtual = info->mach_info->yres.defval;
566 fbinfo->var.bits_per_pixel = info->mach_info->bpp.defval;
567
568 fbinfo->var.upper_margin = 0;
569 fbinfo->var.lower_margin = 0;
570 fbinfo->var.vsync_len = 0;
571
572 fbinfo->var.left_margin = 0;
573 fbinfo->var.right_margin = 0;
574 fbinfo->var.hsync_len = 0;
575
576 fbinfo->var.red.offset = 16;
577 fbinfo->var.green.offset = 8;
578 fbinfo->var.blue.offset = 0;
579 fbinfo->var.transp.offset = 0;
580 fbinfo->var.red.length = 8;
581 fbinfo->var.green.length = 8;
582 fbinfo->var.blue.length = 8;
583 fbinfo->var.transp.length = 0;
584 fbinfo->fix.smem_len = info->mach_info->xres.max *
585 info->mach_info->yres.max * info->mach_info->bpp.max / 8;
586
587 fbinfo->fix.line_length = fbinfo->var.xres_virtual *
588 fbinfo->var.bits_per_pixel / 8;
589
590 info->fb_buffer =
591 dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
592 GFP_KERNEL);
593
594 if (NULL == info->fb_buffer) {
595 printk(KERN_ERR DRIVER_NAME
596 ": couldn't allocate dma buffer.\n");
597 ret = -ENOMEM;
598 goto out3;
599 }
600
e9fa7c43
MH		 601 fbinfo->screen_base = (void *)info->fb_buffer;
602 fbinfo->fix.smem_start = (int)info->fb_buffer;
603
604 fbinfo->fbops = &bfin_bf54x_fb_ops;
605
a34601c5 606 fbinfo->pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL);
e9fa7c43
MH		 607 if (!fbinfo->pseudo_palette) {
608 printk(KERN_ERR DRIVER_NAME
609 "Fail to allocate pseudo_palette\n");
610
611 ret = -ENOMEM;
612 goto out4;
613 }
614
e9fa7c43
MH		 615 if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0)
616 < 0) {
617 printk(KERN_ERR DRIVER_NAME
618 "Fail to allocate colormap (%d entries)\n",
619 BFIN_LCD_NBR_PALETTE_ENTRIES);
620 ret = -EFAULT;
621 goto out5;
622 }
623
624 if (request_ports(info)) {
625 printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.\n");
626 ret = -EFAULT;
627 goto out6;
628 }
629
630 info->irq = platform_get_irq(pdev, 0);
631 if (info->irq < 0) {
632 ret = -EINVAL;
633 goto out7;
634 }
635
f8798ccb 636 if (request_irq(info->irq, bfin_bf54x_irq_error, 0,
e9fa7c43
MH		 637 "PPI ERROR", info) < 0) {
638 printk(KERN_ERR DRIVER_NAME
639 ": unable to request PPI ERROR IRQ\n");
640 ret = -EFAULT;
641 goto out7;
642 }
643
644 if (register_framebuffer(fbinfo) < 0) {
645 printk(KERN_ERR DRIVER_NAME
646 ": unable to register framebuffer.\n");
647 ret = -EINVAL;
648 goto out8;
649 }
650#ifndef NO_BL_SUPPORT
a19a6ee6 651 memset(&props, 0, sizeof(struct backlight_properties));
bb7ca747 652 props.type = BACKLIGHT_RAW;
a19a6ee6
MG		 653 props.max_brightness = 255;
654 bl_dev = backlight_device_register("bf54x-bl", NULL, NULL,
655 &bfin_lq043fb_bl_ops, &props);
fa11de0a
BP		 656 if (IS_ERR(bl_dev)) {
657 printk(KERN_ERR DRIVER_NAME
658 ": unable to register backlight.\n");
659 ret = -EINVAL;
8fc809d1
MF		 660 unregister_framebuffer(fbinfo);
661 goto out8;
fa11de0a 662 }
e9fa7c43 663
b3544ea9 664 lcd_dev = lcd_device_register(DRIVER_NAME, &pdev->dev, NULL, &bfin_lcd_ops);
e9fa7c43
MH		 665 lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.\n");
666#endif
667
668 return 0;
669
670out8:
671 free_irq(info->irq, info);
672out7:
673 free_ports(info);
674out6:
675 fb_dealloc_cmap(&fbinfo->cmap);
676out5:
677 kfree(fbinfo->pseudo_palette);
678out4:
679 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
680 info->dma_handle);
681out3:
682 framebuffer_release(fbinfo);
683out2:
684 free_dma(CH_EPPI0);
685out1:
686 platform_set_drvdata(pdev, NULL);
687
688 return ret;
689}
690
8f09d74a 691static int __devexit bfin_bf54x_remove(struct platform_device *pdev)
e9fa7c43
MH		 692{
693
694 struct fb_info *fbinfo = platform_get_drvdata(pdev);
695 struct bfin_bf54xfb_info *info = fbinfo->par;
696
697 free_dma(CH_EPPI0);
698 free_irq(info->irq, info);
699
700 if (info->fb_buffer != NULL)
701 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
702 info->dma_handle);
703
704 kfree(fbinfo->pseudo_palette);
705 fb_dealloc_cmap(&fbinfo->cmap);
706
707#ifndef NO_BL_SUPPORT
708 lcd_device_unregister(lcd_dev);
709 backlight_device_unregister(bl_dev);
710#endif
711
712 unregister_framebuffer(fbinfo);
713
714 free_ports(info);
715
716 printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.\n");
717
718 return 0;
719}
720
721#ifdef CONFIG_PM
722static int bfin_bf54x_suspend(struct platform_device *pdev, pm_message_t state)
723{
724 struct fb_info *fbinfo = platform_get_drvdata(pdev);
e9fa7c43
MH		 725
726 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
727 disable_dma(CH_EPPI0);
728 bfin_write_EPPI0_STATUS(0xFFFF);
729
730 return 0;
731}
732
733static int bfin_bf54x_resume(struct platform_device *pdev)
734{
735 struct fb_info *fbinfo = platform_get_drvdata(pdev);
736 struct bfin_bf54xfb_info *info = fbinfo->par;
737
141d87e7
MH		 738 if (info->lq043_open_cnt) {
739
740 bfin_write_EPPI0_CONTROL(0);
741 SSYNC();
742
743 config_dma(info);
744 config_ppi(info);
745
746 /* start dma */
747 enable_dma(CH_EPPI0);
748 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
749 }
e9fa7c43
MH		 750
751 return 0;
752}
753#else
754#define bfin_bf54x_suspend NULL
755#define bfin_bf54x_resume NULL
756#endif
757
758static struct platform_driver bfin_bf54x_driver = {
759 .probe = bfin_bf54x_probe,
8f09d74a 760 .remove = __devexit_p(bfin_bf54x_remove),
e9fa7c43
MH		 761 .suspend = bfin_bf54x_suspend,
762 .resume = bfin_bf54x_resume,
763 .driver = {
764 .name = DRIVER_NAME,
765 .owner = THIS_MODULE,
766 },
767};
768
8f09d74a 769static int __init bfin_bf54x_driver_init(void)
e9fa7c43
MH		 770{
771 return platform_driver_register(&bfin_bf54x_driver);
772}
773
774static void __exit bfin_bf54x_driver_cleanup(void)
775{
776 platform_driver_unregister(&bfin_bf54x_driver);
777}
778
779MODULE_DESCRIPTION("Blackfin BF54x TFT LCD Driver");
780MODULE_LICENSE("GPL");
781
782module_init(bfin_bf54x_driver_init);
783module_exit(bfin_bf54x_driver_cleanup);
Linux 6.x block layer and io_uring tree(s)