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USB: convert some miscellanies drivers to use module_usb_driver()
[zen-stable.git] / drivers / video / da8xx-fb.c
blob55f91d9ab00bd18bd01df877eab846a310595956
1 /*
2 * Copyright (C) 2008-2009 MontaVista Software Inc.
3 * Copyright (C) 2008-2009 Texas Instruments Inc
4 *
5 * Based on the LCD driver for TI Avalanche processors written by
6 * Ajay Singh and Shalom Hai.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option)any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22 #include <linux/module.h>
23 #include <linux/kernel.h>
24 #include <linux/fb.h>
25 #include <linux/dma-mapping.h>
26 #include <linux/device.h>
27 #include <linux/platform_device.h>
28 #include <linux/uaccess.h>
29 #include <linux/interrupt.h>
30 #include <linux/clk.h>
31 #include <linux/cpufreq.h>
32 #include <linux/console.h>
33 #include <linux/slab.h>
34 #include <video/da8xx-fb.h>
35
36 #define DRIVER_NAME "da8xx_lcdc"
37
38 #define LCD_VERSION_1 1
39 #define LCD_VERSION_2 2
40
41 /* LCD Status Register */
42 #define LCD_END_OF_FRAME1 BIT(9)
43 #define LCD_END_OF_FRAME0 BIT(8)
44 #define LCD_PL_LOAD_DONE BIT(6)
45 #define LCD_FIFO_UNDERFLOW BIT(5)
46 #define LCD_SYNC_LOST BIT(2)
47
48 /* LCD DMA Control Register */
49 #define LCD_DMA_BURST_SIZE(x) ((x) << 4)
50 #define LCD_DMA_BURST_1 0x0
51 #define LCD_DMA_BURST_2 0x1
52 #define LCD_DMA_BURST_4 0x2
53 #define LCD_DMA_BURST_8 0x3
54 #define LCD_DMA_BURST_16 0x4
55 #define LCD_V1_END_OF_FRAME_INT_ENA BIT(2)
56 #define LCD_V2_END_OF_FRAME0_INT_ENA BIT(8)
57 #define LCD_V2_END_OF_FRAME1_INT_ENA BIT(9)
58 #define LCD_DUAL_FRAME_BUFFER_ENABLE BIT(0)
59
60 /* LCD Control Register */
61 #define LCD_CLK_DIVISOR(x) ((x) << 8)
62 #define LCD_RASTER_MODE 0x01
63
64 /* LCD Raster Control Register */
65 #define LCD_PALETTE_LOAD_MODE(x) ((x) << 20)
66 #define PALETTE_AND_DATA 0x00
67 #define PALETTE_ONLY 0x01
68 #define DATA_ONLY 0x02
69
70 #define LCD_MONO_8BIT_MODE BIT(9)
71 #define LCD_RASTER_ORDER BIT(8)
72 #define LCD_TFT_MODE BIT(7)
73 #define LCD_V1_UNDERFLOW_INT_ENA BIT(6)
74 #define LCD_V2_UNDERFLOW_INT_ENA BIT(5)
75 #define LCD_V1_PL_INT_ENA BIT(4)
76 #define LCD_V2_PL_INT_ENA BIT(6)
77 #define LCD_MONOCHROME_MODE BIT(1)
78 #define LCD_RASTER_ENABLE BIT(0)
79 #define LCD_TFT_ALT_ENABLE BIT(23)
80 #define LCD_STN_565_ENABLE BIT(24)
81 #define LCD_V2_DMA_CLK_EN BIT(2)
82 #define LCD_V2_LIDD_CLK_EN BIT(1)
83 #define LCD_V2_CORE_CLK_EN BIT(0)
84 #define LCD_V2_LPP_B10 26
85
86 /* LCD Raster Timing 2 Register */
87 #define LCD_AC_BIAS_TRANSITIONS_PER_INT(x) ((x) << 16)
88 #define LCD_AC_BIAS_FREQUENCY(x) ((x) << 8)
89 #define LCD_SYNC_CTRL BIT(25)
90 #define LCD_SYNC_EDGE BIT(24)
91 #define LCD_INVERT_PIXEL_CLOCK BIT(22)
92 #define LCD_INVERT_LINE_CLOCK BIT(21)
93 #define LCD_INVERT_FRAME_CLOCK BIT(20)
94
95 /* LCD Block */
96 #define LCD_PID_REG 0x0
97 #define LCD_CTRL_REG 0x4
98 #define LCD_STAT_REG 0x8
99 #define LCD_RASTER_CTRL_REG 0x28
100 #define LCD_RASTER_TIMING_0_REG 0x2C
101 #define LCD_RASTER_TIMING_1_REG 0x30
102 #define LCD_RASTER_TIMING_2_REG 0x34
103 #define LCD_DMA_CTRL_REG 0x40
104 #define LCD_DMA_FRM_BUF_BASE_ADDR_0_REG 0x44
105 #define LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG 0x48
106 #define LCD_DMA_FRM_BUF_BASE_ADDR_1_REG 0x4C
107 #define LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG 0x50
108
109 /* Interrupt Registers available only in Version 2 */
110 #define LCD_RAW_STAT_REG 0x58
111 #define LCD_MASKED_STAT_REG 0x5c
112 #define LCD_INT_ENABLE_SET_REG 0x60
113 #define LCD_INT_ENABLE_CLR_REG 0x64
114 #define LCD_END_OF_INT_IND_REG 0x68
115
116 /* Clock registers available only on Version 2 */
117 #define LCD_CLK_ENABLE_REG 0x6c
118 #define LCD_CLK_RESET_REG 0x70
119
120 #define LCD_NUM_BUFFERS 2
121
122 #define WSI_TIMEOUT 50
123 #define PALETTE_SIZE 256
124 #define LEFT_MARGIN 64
125 #define RIGHT_MARGIN 64
126 #define UPPER_MARGIN 32
127 #define LOWER_MARGIN 32
128
129 static resource_size_t da8xx_fb_reg_base;
130 static struct resource *lcdc_regs;
131 static unsigned int lcd_revision;
132 static irq_handler_t lcdc_irq_handler;
133
134 static inline unsigned int lcdc_read(unsigned int addr)
135 {
136 return (unsigned int)__raw_readl(da8xx_fb_reg_base + (addr));
137 }
138
139 static inline void lcdc_write(unsigned int val, unsigned int addr)
140 {
141 __raw_writel(val, da8xx_fb_reg_base + (addr));
142 }
143
144 struct da8xx_fb_par {
145 resource_size_t p_palette_base;
146 unsigned char *v_palette_base;
147 dma_addr_t vram_phys;
148 unsigned long vram_size;
149 void *vram_virt;
150 unsigned int dma_start;
151 unsigned int dma_end;
152 struct clk *lcdc_clk;
153 int irq;
154 unsigned short pseudo_palette[16];
155 unsigned int palette_sz;
156 unsigned int pxl_clk;
157 int blank;
158 wait_queue_head_t vsync_wait;
159 int vsync_flag;
160 int vsync_timeout;
161 #ifdef CONFIG_CPU_FREQ
162 struct notifier_block freq_transition;
163 #endif
164 void (*panel_power_ctrl)(int);
165 };
166
167 /* Variable Screen Information */
168 static struct fb_var_screeninfo da8xx_fb_var __devinitdata = {
169 .xoffset = 0,
170 .yoffset = 0,
171 .transp = {0, 0, 0},
172 .nonstd = 0,
173 .activate = 0,
174 .height = -1,
175 .width = -1,
176 .pixclock = 46666, /* 46us - AUO display */
177 .accel_flags = 0,
178 .left_margin = LEFT_MARGIN,
179 .right_margin = RIGHT_MARGIN,
180 .upper_margin = UPPER_MARGIN,
181 .lower_margin = LOWER_MARGIN,
182 .sync = 0,
183 .vmode = FB_VMODE_NONINTERLACED
184 };
185
186 static struct fb_fix_screeninfo da8xx_fb_fix __devinitdata = {
187 .id = "DA8xx FB Drv",
188 .type = FB_TYPE_PACKED_PIXELS,
189 .type_aux = 0,
190 .visual = FB_VISUAL_PSEUDOCOLOR,
191 .xpanstep = 0,
192 .ypanstep = 1,
193 .ywrapstep = 0,
194 .accel = FB_ACCEL_NONE
195 };
196
197 struct da8xx_panel {
198 const char name[25]; /* Full name <vendor>_<model> */
199 unsigned short width;
200 unsigned short height;
201 int hfp; /* Horizontal front porch */
202 int hbp; /* Horizontal back porch */
203 int hsw; /* Horizontal Sync Pulse Width */
204 int vfp; /* Vertical front porch */
205 int vbp; /* Vertical back porch */
206 int vsw; /* Vertical Sync Pulse Width */
207 unsigned int pxl_clk; /* Pixel clock */
208 unsigned char invert_pxl_clk; /* Invert Pixel clock */
209 };
210
211 static struct da8xx_panel known_lcd_panels[] = {
212 /* Sharp LCD035Q3DG01 */
213 [0] = {
214 .name = "Sharp_LCD035Q3DG01",
215 .width = 320,
216 .height = 240,
217 .hfp = 8,
218 .hbp = 6,
219 .hsw = 0,
220 .vfp = 2,
221 .vbp = 2,
222 .vsw = 0,
223 .pxl_clk = 4608000,
224 .invert_pxl_clk = 1,
225 },
226 /* Sharp LK043T1DG01 */
227 [1] = {
228 .name = "Sharp_LK043T1DG01",
229 .width = 480,
230 .height = 272,
231 .hfp = 2,
232 .hbp = 2,
233 .hsw = 41,
234 .vfp = 2,
235 .vbp = 2,
236 .vsw = 10,
237 .pxl_clk = 7833600,
238 .invert_pxl_clk = 0,
239 },
240 };
241
242 /* Enable the Raster Engine of the LCD Controller */
243 static inline void lcd_enable_raster(void)
244 {
245 u32 reg;
246
247 reg = lcdc_read(LCD_RASTER_CTRL_REG);
248 if (!(reg & LCD_RASTER_ENABLE))
249 lcdc_write(reg | LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
250 }
251
252 /* Disable the Raster Engine of the LCD Controller */
253 static inline void lcd_disable_raster(void)
254 {
255 u32 reg;
256
257 reg = lcdc_read(LCD_RASTER_CTRL_REG);
258 if (reg & LCD_RASTER_ENABLE)
259 lcdc_write(reg & ~LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
260 }
261
262 static void lcd_blit(int load_mode, struct da8xx_fb_par *par)
263 {
264 u32 start;
265 u32 end;
266 u32 reg_ras;
267 u32 reg_dma;
268 u32 reg_int;
269
270 /* init reg to clear PLM (loading mode) fields */
271 reg_ras = lcdc_read(LCD_RASTER_CTRL_REG);
272 reg_ras &= ~(3 << 20);
273
274 reg_dma = lcdc_read(LCD_DMA_CTRL_REG);
275
276 if (load_mode == LOAD_DATA) {
277 start = par->dma_start;
278 end = par->dma_end;
279
280 reg_ras |= LCD_PALETTE_LOAD_MODE(DATA_ONLY);
281 if (lcd_revision == LCD_VERSION_1) {
282 reg_dma |= LCD_V1_END_OF_FRAME_INT_ENA;
283 } else {
284 reg_int = lcdc_read(LCD_INT_ENABLE_SET_REG) |
285 LCD_V2_END_OF_FRAME0_INT_ENA |
286 LCD_V2_END_OF_FRAME1_INT_ENA;
287 lcdc_write(reg_int, LCD_INT_ENABLE_SET_REG);
288 }
289 reg_dma |= LCD_DUAL_FRAME_BUFFER_ENABLE;
290
291 lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
292 lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
293 lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
294 lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
295 } else if (load_mode == LOAD_PALETTE) {
296 start = par->p_palette_base;
297 end = start + par->palette_sz - 1;
298
299 reg_ras |= LCD_PALETTE_LOAD_MODE(PALETTE_ONLY);
300
301 if (lcd_revision == LCD_VERSION_1) {
302 reg_ras |= LCD_V1_PL_INT_ENA;
303 } else {
304 reg_int = lcdc_read(LCD_INT_ENABLE_SET_REG) |
305 LCD_V2_PL_INT_ENA;
306 lcdc_write(reg_int, LCD_INT_ENABLE_SET_REG);
307 }
308
309 lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
310 lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
311 }
312
313 lcdc_write(reg_dma, LCD_DMA_CTRL_REG);
314 lcdc_write(reg_ras, LCD_RASTER_CTRL_REG);
315
316 /*
317 * The Raster enable bit must be set after all other control fields are
318 * set.
319 */
320 lcd_enable_raster();
321 }
322
323 /* Configure the Burst Size of DMA */
324 static int lcd_cfg_dma(int burst_size)
325 {
326 u32 reg;
327
328 reg = lcdc_read(LCD_DMA_CTRL_REG) & 0x00000001;
329 switch (burst_size) {
330 case 1:
331 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_1);
332 break;
333 case 2:
334 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_2);
335 break;
336 case 4:
337 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_4);
338 break;
339 case 8:
340 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_8);
341 break;
342 case 16:
343 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_16);
344 break;
345 default:
346 return -EINVAL;
347 }
348 lcdc_write(reg, LCD_DMA_CTRL_REG);
349
350 return 0;
351 }
352
353 static void lcd_cfg_ac_bias(int period, int transitions_per_int)
354 {
355 u32 reg;
356
357 /* Set the AC Bias Period and Number of Transisitons per Interrupt */
358 reg = lcdc_read(LCD_RASTER_TIMING_2_REG) & 0xFFF00000;
359 reg |= LCD_AC_BIAS_FREQUENCY(period) |
360 LCD_AC_BIAS_TRANSITIONS_PER_INT(transitions_per_int);
361 lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
362 }
363
364 static void lcd_cfg_horizontal_sync(int back_porch, int pulse_width,
365 int front_porch)
366 {
367 u32 reg;
368
369 reg = lcdc_read(LCD_RASTER_TIMING_0_REG) & 0xf;
370 reg |= ((back_porch & 0xff) << 24)
371 | ((front_porch & 0xff) << 16)
372 | ((pulse_width & 0x3f) << 10);
373 lcdc_write(reg, LCD_RASTER_TIMING_0_REG);
374 }
375
376 static void lcd_cfg_vertical_sync(int back_porch, int pulse_width,
377 int front_porch)
378 {
379 u32 reg;
380
381 reg = lcdc_read(LCD_RASTER_TIMING_1_REG) & 0x3ff;
382 reg |= ((back_porch & 0xff) << 24)
383 | ((front_porch & 0xff) << 16)
384 | ((pulse_width & 0x3f) << 10);
385 lcdc_write(reg, LCD_RASTER_TIMING_1_REG);
386 }
387
388 static int lcd_cfg_display(const struct lcd_ctrl_config *cfg)
389 {
390 u32 reg;
391 u32 reg_int;
392
393 reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(LCD_TFT_MODE |
394 LCD_MONO_8BIT_MODE |
395 LCD_MONOCHROME_MODE);
396
397 switch (cfg->p_disp_panel->panel_shade) {
398 case MONOCHROME:
399 reg |= LCD_MONOCHROME_MODE;
400 if (cfg->mono_8bit_mode)
401 reg |= LCD_MONO_8BIT_MODE;
402 break;
403 case COLOR_ACTIVE:
404 reg |= LCD_TFT_MODE;
405 if (cfg->tft_alt_mode)
406 reg |= LCD_TFT_ALT_ENABLE;
407 break;
408
409 case COLOR_PASSIVE:
410 if (cfg->stn_565_mode)
411 reg |= LCD_STN_565_ENABLE;
412 break;
413
414 default:
415 return -EINVAL;
416 }
417
418 /* enable additional interrupts here */
419 if (lcd_revision == LCD_VERSION_1) {
420 reg |= LCD_V1_UNDERFLOW_INT_ENA;
421 } else {
422 reg_int = lcdc_read(LCD_INT_ENABLE_SET_REG) |
423 LCD_V2_UNDERFLOW_INT_ENA;
424 lcdc_write(reg_int, LCD_INT_ENABLE_SET_REG);
425 }
426
427 lcdc_write(reg, LCD_RASTER_CTRL_REG);
428
429 reg = lcdc_read(LCD_RASTER_TIMING_2_REG);
430
431 if (cfg->sync_ctrl)
432 reg |= LCD_SYNC_CTRL;
433 else
434 reg &= ~LCD_SYNC_CTRL;
435
436 if (cfg->sync_edge)
437 reg |= LCD_SYNC_EDGE;
438 else
439 reg &= ~LCD_SYNC_EDGE;
440
441 if (cfg->invert_line_clock)
442 reg |= LCD_INVERT_LINE_CLOCK;
443 else
444 reg &= ~LCD_INVERT_LINE_CLOCK;
445
446 if (cfg->invert_frm_clock)
447 reg |= LCD_INVERT_FRAME_CLOCK;
448 else
449 reg &= ~LCD_INVERT_FRAME_CLOCK;
450
451 lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
452
453 return 0;
454 }
455
456 static int lcd_cfg_frame_buffer(struct da8xx_fb_par *par, u32 width, u32 height,
457 u32 bpp, u32 raster_order)
458 {
459 u32 reg;
460
461 /* Set the Panel Width */
462 /* Pixels per line = (PPL + 1)*16 */
463 if (lcd_revision == LCD_VERSION_1) {
464 /*
465 * 0x3F in bits 4..9 gives max horizontal resolution = 1024
466 * pixels.
467 */
468 width &= 0x3f0;
469 } else {
470 /*
471 * 0x7F in bits 4..10 gives max horizontal resolution = 2048
472 * pixels.
473 */
474 width &= 0x7f0;
475 }
476
477 reg = lcdc_read(LCD_RASTER_TIMING_0_REG);
478 reg &= 0xfffffc00;
479 if (lcd_revision == LCD_VERSION_1) {
480 reg |= ((width >> 4) - 1) << 4;
481 } else {
482 width = (width >> 4) - 1;
483 reg |= ((width & 0x3f) << 4) | ((width & 0x40) >> 3);
484 }
485 lcdc_write(reg, LCD_RASTER_TIMING_0_REG);
486
487 /* Set the Panel Height */
488 /* Set bits 9:0 of Lines Per Pixel */
489 reg = lcdc_read(LCD_RASTER_TIMING_1_REG);
490 reg = ((height - 1) & 0x3ff) | (reg & 0xfffffc00);
491 lcdc_write(reg, LCD_RASTER_TIMING_1_REG);
492
493 /* Set bit 10 of Lines Per Pixel */
494 if (lcd_revision == LCD_VERSION_2) {
495 reg = lcdc_read(LCD_RASTER_TIMING_2_REG);
496 reg |= ((height - 1) & 0x400) << 16;
497 lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
498 }
499
500 /* Set the Raster Order of the Frame Buffer */
501 reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(1 << 8);
502 if (raster_order)
503 reg |= LCD_RASTER_ORDER;
504 lcdc_write(reg, LCD_RASTER_CTRL_REG);
505
506 switch (bpp) {
507 case 1:
508 case 2:
509 case 4:
510 case 16:
511 par->palette_sz = 16 * 2;
512 break;
513
514 case 8:
515 par->palette_sz = 256 * 2;
516 break;
517
518 default:
519 return -EINVAL;
520 }
521
522 return 0;
523 }
524
525 static int fb_setcolreg(unsigned regno, unsigned red, unsigned green,
526 unsigned blue, unsigned transp,
527 struct fb_info *info)
528 {
529 struct da8xx_fb_par *par = info->par;
530 unsigned short *palette = (unsigned short *) par->v_palette_base;
531 u_short pal;
532 int update_hw = 0;
533
534 if (regno > 255)
535 return 1;
536
537 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR)
538 return 1;
539
540 if (info->var.bits_per_pixel == 8) {
541 red >>= 4;
542 green >>= 8;
543 blue >>= 12;
544
545 pal = (red & 0x0f00);
546 pal |= (green & 0x00f0);
547 pal |= (blue & 0x000f);
548
549 if (palette[regno] != pal) {
550 update_hw = 1;
551 palette[regno] = pal;
552 }
553 } else if ((info->var.bits_per_pixel == 16) && regno < 16) {
554 red >>= (16 - info->var.red.length);
555 red <<= info->var.red.offset;
556
557 green >>= (16 - info->var.green.length);
558 green <<= info->var.green.offset;
559
560 blue >>= (16 - info->var.blue.length);
561 blue <<= info->var.blue.offset;
562
563 par->pseudo_palette[regno] = red | green | blue;
564
565 if (palette[0] != 0x4000) {
566 update_hw = 1;
567 palette[0] = 0x4000;
568 }
569 }
570
571 /* Update the palette in the h/w as needed. */
572 if (update_hw)
573 lcd_blit(LOAD_PALETTE, par);
574
575 return 0;
576 }
577
578 static void lcd_reset(struct da8xx_fb_par *par)
579 {
580 /* Disable the Raster if previously Enabled */
581 lcd_disable_raster();
582
583 /* DMA has to be disabled */
584 lcdc_write(0, LCD_DMA_CTRL_REG);
585 lcdc_write(0, LCD_RASTER_CTRL_REG);
586
587 if (lcd_revision == LCD_VERSION_2)
588 lcdc_write(0, LCD_INT_ENABLE_SET_REG);
589 }
590
591 static void lcd_calc_clk_divider(struct da8xx_fb_par *par)
592 {
593 unsigned int lcd_clk, div;
594
595 lcd_clk = clk_get_rate(par->lcdc_clk);
596 div = lcd_clk / par->pxl_clk;
597
598 /* Configure the LCD clock divisor. */
599 lcdc_write(LCD_CLK_DIVISOR(div) |
600 (LCD_RASTER_MODE & 0x1), LCD_CTRL_REG);
601
602 if (lcd_revision == LCD_VERSION_2)
603 lcdc_write(LCD_V2_DMA_CLK_EN | LCD_V2_LIDD_CLK_EN |
604 LCD_V2_CORE_CLK_EN, LCD_CLK_ENABLE_REG);
605
606 }
607
608 static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg,
609 struct da8xx_panel *panel)
610 {
611 u32 bpp;
612 int ret = 0;
613
614 lcd_reset(par);
615
616 /* Calculate the divider */
617 lcd_calc_clk_divider(par);
618
619 if (panel->invert_pxl_clk)
620 lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) |
621 LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
622 else
623 lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) &
624 ~LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
625
626 /* Configure the DMA burst size. */
627 ret = lcd_cfg_dma(cfg->dma_burst_sz);
628 if (ret < 0)
629 return ret;
630
631 /* Configure the AC bias properties. */
632 lcd_cfg_ac_bias(cfg->ac_bias, cfg->ac_bias_intrpt);
633
634 /* Configure the vertical and horizontal sync properties. */
635 lcd_cfg_vertical_sync(panel->vbp, panel->vsw, panel->vfp);
636 lcd_cfg_horizontal_sync(panel->hbp, panel->hsw, panel->hfp);
637
638 /* Configure for disply */
639 ret = lcd_cfg_display(cfg);
640 if (ret < 0)
641 return ret;
642
643 if (QVGA != cfg->p_disp_panel->panel_type)
644 return -EINVAL;
645
646 if (cfg->bpp <= cfg->p_disp_panel->max_bpp &&
647 cfg->bpp >= cfg->p_disp_panel->min_bpp)
648 bpp = cfg->bpp;
649 else
650 bpp = cfg->p_disp_panel->max_bpp;
651 if (bpp == 12)
652 bpp = 16;
653 ret = lcd_cfg_frame_buffer(par, (unsigned int)panel->width,
654 (unsigned int)panel->height, bpp,
655 cfg->raster_order);
656 if (ret < 0)
657 return ret;
658
659 /* Configure FDD */
660 lcdc_write((lcdc_read(LCD_RASTER_CTRL_REG) & 0xfff00fff) |
661 (cfg->fdd << 12), LCD_RASTER_CTRL_REG);
662
663 return 0;
664 }
665
666 /* IRQ handler for version 2 of LCDC */
667 static irqreturn_t lcdc_irq_handler_rev02(int irq, void *arg)
668 {
669 struct da8xx_fb_par *par = arg;
670 u32 stat = lcdc_read(LCD_MASKED_STAT_REG);
671 u32 reg_int;
672
673 if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
674 lcd_disable_raster();
675 lcdc_write(stat, LCD_MASKED_STAT_REG);
676 lcd_enable_raster();
677 } else if (stat & LCD_PL_LOAD_DONE) {
678 /*
679 * Must disable raster before changing state of any control bit.
680 * And also must be disabled before clearing the PL loading
681 * interrupt via the following write to the status register. If
682 * this is done after then one gets multiple PL done interrupts.
683 */
684 lcd_disable_raster();
685
686 lcdc_write(stat, LCD_MASKED_STAT_REG);
687
688 /* Disable PL completion inerrupt */
689 reg_int = lcdc_read(LCD_INT_ENABLE_CLR_REG) |
690 (LCD_V2_PL_INT_ENA);
691 lcdc_write(reg_int, LCD_INT_ENABLE_CLR_REG);
692
693 /* Setup and start data loading mode */
694 lcd_blit(LOAD_DATA, par);
695 } else {
696 lcdc_write(stat, LCD_MASKED_STAT_REG);
697
698 if (stat & LCD_END_OF_FRAME0) {
699 lcdc_write(par->dma_start,
700 LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
701 lcdc_write(par->dma_end,
702 LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
703 par->vsync_flag = 1;
704 wake_up_interruptible(&par->vsync_wait);
705 }
706
707 if (stat & LCD_END_OF_FRAME1) {
708 lcdc_write(par->dma_start,
709 LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
710 lcdc_write(par->dma_end,
711 LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
712 par->vsync_flag = 1;
713 wake_up_interruptible(&par->vsync_wait);
714 }
715 }
716
717 lcdc_write(0, LCD_END_OF_INT_IND_REG);
718 return IRQ_HANDLED;
719 }
720
721 /* IRQ handler for version 1 LCDC */
722 static irqreturn_t lcdc_irq_handler_rev01(int irq, void *arg)
723 {
724 struct da8xx_fb_par *par = arg;
725 u32 stat = lcdc_read(LCD_STAT_REG);
726 u32 reg_ras;
727
728 if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
729 lcd_disable_raster();
730 lcdc_write(stat, LCD_STAT_REG);
731 lcd_enable_raster();
732 } else if (stat & LCD_PL_LOAD_DONE) {
733 /*
734 * Must disable raster before changing state of any control bit.
735 * And also must be disabled before clearing the PL loading
736 * interrupt via the following write to the status register. If
737 * this is done after then one gets multiple PL done interrupts.
738 */
739 lcd_disable_raster();
740
741 lcdc_write(stat, LCD_STAT_REG);
742
743 /* Disable PL completion inerrupt */
744 reg_ras = lcdc_read(LCD_RASTER_CTRL_REG);
745 reg_ras &= ~LCD_V1_PL_INT_ENA;
746 lcdc_write(reg_ras, LCD_RASTER_CTRL_REG);
747
748 /* Setup and start data loading mode */
749 lcd_blit(LOAD_DATA, par);
750 } else {
751 lcdc_write(stat, LCD_STAT_REG);
752
753 if (stat & LCD_END_OF_FRAME0) {
754 lcdc_write(par->dma_start,
755 LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
756 lcdc_write(par->dma_end,
757 LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
758 par->vsync_flag = 1;
759 wake_up_interruptible(&par->vsync_wait);
760 }
761
762 if (stat & LCD_END_OF_FRAME1) {
763 lcdc_write(par->dma_start,
764 LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
765 lcdc_write(par->dma_end,
766 LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
767 par->vsync_flag = 1;
768 wake_up_interruptible(&par->vsync_wait);
769 }
770 }
771
772 return IRQ_HANDLED;
773 }
774
775 static int fb_check_var(struct fb_var_screeninfo *var,
776 struct fb_info *info)
777 {
778 int err = 0;
779
780 switch (var->bits_per_pixel) {
781 case 1:
782 case 8:
783 var->red.offset = 0;
784 var->red.length = 8;
785 var->green.offset = 0;
786 var->green.length = 8;
787 var->blue.offset = 0;
788 var->blue.length = 8;
789 var->transp.offset = 0;
790 var->transp.length = 0;
791 break;
792 case 4:
793 var->red.offset = 0;
794 var->red.length = 4;
795 var->green.offset = 0;
796 var->green.length = 4;
797 var->blue.offset = 0;
798 var->blue.length = 4;
799 var->transp.offset = 0;
800 var->transp.length = 0;
801 break;
802 case 16: /* RGB 565 */
803 var->red.offset = 11;
804 var->red.length = 5;
805 var->green.offset = 5;
806 var->green.length = 6;
807 var->blue.offset = 0;
808 var->blue.length = 5;
809 var->transp.offset = 0;
810 var->transp.length = 0;
811 break;
812 default:
813 err = -EINVAL;
814 }
815
816 var->red.msb_right = 0;
817 var->green.msb_right = 0;
818 var->blue.msb_right = 0;
819 var->transp.msb_right = 0;
820 return err;
821 }
822
823 #ifdef CONFIG_CPU_FREQ
824 static int lcd_da8xx_cpufreq_transition(struct notifier_block *nb,
825 unsigned long val, void *data)
826 {
827 struct da8xx_fb_par *par;
828
829 par = container_of(nb, struct da8xx_fb_par, freq_transition);
830 if (val == CPUFREQ_PRECHANGE) {
831 lcd_disable_raster();
832 } else if (val == CPUFREQ_POSTCHANGE) {
833 lcd_calc_clk_divider(par);
834 lcd_enable_raster();
835 }
836
837 return 0;
838 }
839
840 static inline int lcd_da8xx_cpufreq_register(struct da8xx_fb_par *par)
841 {
842 par->freq_transition.notifier_call = lcd_da8xx_cpufreq_transition;
843
844 return cpufreq_register_notifier(&par->freq_transition,
845 CPUFREQ_TRANSITION_NOTIFIER);
846 }
847
848 static inline void lcd_da8xx_cpufreq_deregister(struct da8xx_fb_par *par)
849 {
850 cpufreq_unregister_notifier(&par->freq_transition,
851 CPUFREQ_TRANSITION_NOTIFIER);
852 }
853 #endif
854
855 static int __devexit fb_remove(struct platform_device *dev)
856 {
857 struct fb_info *info = dev_get_drvdata(&dev->dev);
858
859 if (info) {
860 struct da8xx_fb_par *par = info->par;
861
862 #ifdef CONFIG_CPU_FREQ
863 lcd_da8xx_cpufreq_deregister(par);
864 #endif
865 if (par->panel_power_ctrl)
866 par->panel_power_ctrl(0);
867
868 lcd_disable_raster();
869 lcdc_write(0, LCD_RASTER_CTRL_REG);
870
871 /* disable DMA */
872 lcdc_write(0, LCD_DMA_CTRL_REG);
873
874 unregister_framebuffer(info);
875 fb_dealloc_cmap(&info->cmap);
876 dma_free_coherent(NULL, PALETTE_SIZE, par->v_palette_base,
877 par->p_palette_base);
878 dma_free_coherent(NULL, par->vram_size, par->vram_virt,
879 par->vram_phys);
880 free_irq(par->irq, par);
881 clk_disable(par->lcdc_clk);
882 clk_put(par->lcdc_clk);
883 framebuffer_release(info);
884 iounmap((void __iomem *)da8xx_fb_reg_base);
885 release_mem_region(lcdc_regs->start, resource_size(lcdc_regs));
886
887 }
888 return 0;
889 }
890
891 /*
892 * Function to wait for vertical sync which for this LCD peripheral
893 * translates into waiting for the current raster frame to complete.
894 */
895 static int fb_wait_for_vsync(struct fb_info *info)
896 {
897 struct da8xx_fb_par *par = info->par;
898 int ret;
899
900 /*
901 * Set flag to 0 and wait for isr to set to 1. It would seem there is a
902 * race condition here where the ISR could have occurred just before or
903 * just after this set. But since we are just coarsely waiting for
904 * a frame to complete then that's OK. i.e. if the frame completed
905 * just before this code executed then we have to wait another full
906 * frame time but there is no way to avoid such a situation. On the
907 * other hand if the frame completed just after then we don't need
908 * to wait long at all. Either way we are guaranteed to return to the
909 * user immediately after a frame completion which is all that is
910 * required.
911 */
912 par->vsync_flag = 0;
913 ret = wait_event_interruptible_timeout(par->vsync_wait,
914 par->vsync_flag != 0,
915 par->vsync_timeout);
916 if (ret < 0)
917 return ret;
918 if (ret == 0)
919 return -ETIMEDOUT;
920
921 return 0;
922 }
923
924 static int fb_ioctl(struct fb_info *info, unsigned int cmd,
925 unsigned long arg)
926 {
927 struct lcd_sync_arg sync_arg;
928
929 switch (cmd) {
930 case FBIOGET_CONTRAST:
931 case FBIOPUT_CONTRAST:
932 case FBIGET_BRIGHTNESS:
933 case FBIPUT_BRIGHTNESS:
934 case FBIGET_COLOR:
935 case FBIPUT_COLOR:
936 return -ENOTTY;
937 case FBIPUT_HSYNC:
938 if (copy_from_user(&sync_arg, (char *)arg,
939 sizeof(struct lcd_sync_arg)))
940 return -EFAULT;
941 lcd_cfg_horizontal_sync(sync_arg.back_porch,
942 sync_arg.pulse_width,
943 sync_arg.front_porch);
944 break;
945 case FBIPUT_VSYNC:
946 if (copy_from_user(&sync_arg, (char *)arg,
947 sizeof(struct lcd_sync_arg)))
948 return -EFAULT;
949 lcd_cfg_vertical_sync(sync_arg.back_porch,
950 sync_arg.pulse_width,
951 sync_arg.front_porch);
952 break;
953 case FBIO_WAITFORVSYNC:
954 return fb_wait_for_vsync(info);
955 default:
956 return -EINVAL;
957 }
958 return 0;
959 }
960
961 static int cfb_blank(int blank, struct fb_info *info)
962 {
963 struct da8xx_fb_par *par = info->par;
964 int ret = 0;
965
966 if (par->blank == blank)
967 return 0;
968
969 par->blank = blank;
970 switch (blank) {
971 case FB_BLANK_UNBLANK:
972 if (par->panel_power_ctrl)
973 par->panel_power_ctrl(1);
974
975 lcd_enable_raster();
976 break;
977 case FB_BLANK_POWERDOWN:
978 if (par->panel_power_ctrl)
979 par->panel_power_ctrl(0);
980
981 lcd_disable_raster();
982 break;
983 default:
984 ret = -EINVAL;
985 }
986
987 return ret;
988 }
989
990 /*
991 * Set new x,y offsets in the virtual display for the visible area and switch
992 * to the new mode.
993 */
994 static int da8xx_pan_display(struct fb_var_screeninfo *var,
995 struct fb_info *fbi)
996 {
997 int ret = 0;
998 struct fb_var_screeninfo new_var;
999 struct da8xx_fb_par *par = fbi->par;
1000 struct fb_fix_screeninfo *fix = &fbi->fix;
1001 unsigned int end;
1002 unsigned int start;
1003
1004 if (var->xoffset != fbi->var.xoffset ||
1005 var->yoffset != fbi->var.yoffset) {
1006 memcpy(&new_var, &fbi->var, sizeof(new_var));
1007 new_var.xoffset = var->xoffset;
1008 new_var.yoffset = var->yoffset;
1009 if (fb_check_var(&new_var, fbi))
1010 ret = -EINVAL;
1011 else {
1012 memcpy(&fbi->var, &new_var, sizeof(new_var));
1013
1014 start = fix->smem_start +
1015 new_var.yoffset * fix->line_length +
1016 new_var.xoffset * fbi->var.bits_per_pixel / 8;
1017 end = start + fbi->var.yres * fix->line_length - 1;
1018 par->dma_start = start;
1019 par->dma_end = end;
1020 }
1021 }
1022
1023 return ret;
1024 }
1025
1026 static struct fb_ops da8xx_fb_ops = {
1027 .owner = THIS_MODULE,
1028 .fb_check_var = fb_check_var,
1029 .fb_setcolreg = fb_setcolreg,
1030 .fb_pan_display = da8xx_pan_display,
1031 .fb_ioctl = fb_ioctl,
1032 .fb_fillrect = cfb_fillrect,
1033 .fb_copyarea = cfb_copyarea,
1034 .fb_imageblit = cfb_imageblit,
1035 .fb_blank = cfb_blank,
1036 };
1037
1038 static int __devinit fb_probe(struct platform_device *device)
1039 {
1040 struct da8xx_lcdc_platform_data *fb_pdata =
1041 device->dev.platform_data;
1042 struct lcd_ctrl_config *lcd_cfg;
1043 struct da8xx_panel *lcdc_info;
1044 struct fb_info *da8xx_fb_info;
1045 struct clk *fb_clk = NULL;
1046 struct da8xx_fb_par *par;
1047 resource_size_t len;
1048 int ret, i;
1049
1050 if (fb_pdata == NULL) {
1051 dev_err(&device->dev, "Can not get platform data\n");
1052 return -ENOENT;
1053 }
1054
1055 lcdc_regs = platform_get_resource(device, IORESOURCE_MEM, 0);
1056 if (!lcdc_regs) {
1057 dev_err(&device->dev,
1058 "Can not get memory resource for LCD controller\n");
1059 return -ENOENT;
1060 }
1061
1062 len = resource_size(lcdc_regs);
1063
1064 lcdc_regs = request_mem_region(lcdc_regs->start, len, lcdc_regs->name);
1065 if (!lcdc_regs)
1066 return -EBUSY;
1067
1068 da8xx_fb_reg_base = (resource_size_t)ioremap(lcdc_regs->start, len);
1069 if (!da8xx_fb_reg_base) {
1070 ret = -EBUSY;
1071 goto err_request_mem;
1072 }
1073
1074 fb_clk = clk_get(&device->dev, NULL);
1075 if (IS_ERR(fb_clk)) {
1076 dev_err(&device->dev, "Can not get device clock\n");
1077 ret = -ENODEV;
1078 goto err_ioremap;
1079 }
1080 ret = clk_enable(fb_clk);
1081 if (ret)
1082 goto err_clk_put;
1083
1084 /* Determine LCD IP Version */
1085 switch (lcdc_read(LCD_PID_REG)) {
1086 case 0x4C100102:
1087 lcd_revision = LCD_VERSION_1;
1088 break;
1089 case 0x4F200800:
1090 lcd_revision = LCD_VERSION_2;
1091 break;
1092 default:
1093 dev_warn(&device->dev, "Unknown PID Reg value 0x%x, "
1094 "defaulting to LCD revision 1\n",
1095 lcdc_read(LCD_PID_REG));
1096 lcd_revision = LCD_VERSION_1;
1097 break;
1098 }
1099
1100 for (i = 0, lcdc_info = known_lcd_panels;
1101 i < ARRAY_SIZE(known_lcd_panels);
1102 i++, lcdc_info++) {
1103 if (strcmp(fb_pdata->type, lcdc_info->name) == 0)
1104 break;
1105 }
1106
1107 if (i == ARRAY_SIZE(known_lcd_panels)) {
1108 dev_err(&device->dev, "GLCD: No valid panel found\n");
1109 ret = -ENODEV;
1110 goto err_clk_disable;
1111 } else
1112 dev_info(&device->dev, "GLCD: Found %s panel\n",
1113 fb_pdata->type);
1114
1115 lcd_cfg = (struct lcd_ctrl_config *)fb_pdata->controller_data;
1116
1117 da8xx_fb_info = framebuffer_alloc(sizeof(struct da8xx_fb_par),
1118 &device->dev);
1119 if (!da8xx_fb_info) {
1120 dev_dbg(&device->dev, "Memory allocation failed for fb_info\n");
1121 ret = -ENOMEM;
1122 goto err_clk_disable;
1123 }
1124
1125 par = da8xx_fb_info->par;
1126 par->lcdc_clk = fb_clk;
1127 par->pxl_clk = lcdc_info->pxl_clk;
1128 if (fb_pdata->panel_power_ctrl) {
1129 par->panel_power_ctrl = fb_pdata->panel_power_ctrl;
1130 par->panel_power_ctrl(1);
1131 }
1132
1133 if (lcd_init(par, lcd_cfg, lcdc_info) < 0) {
1134 dev_err(&device->dev, "lcd_init failed\n");
1135 ret = -EFAULT;
1136 goto err_release_fb;
1137 }
1138
1139 /* allocate frame buffer */
1140 par->vram_size = lcdc_info->width * lcdc_info->height * lcd_cfg->bpp;
1141 par->vram_size = PAGE_ALIGN(par->vram_size/8);
1142 par->vram_size = par->vram_size * LCD_NUM_BUFFERS;
1143
1144 par->vram_virt = dma_alloc_coherent(NULL,
1145 par->vram_size,
1146 (resource_size_t *) &par->vram_phys,
1147 GFP_KERNEL | GFP_DMA);
1148 if (!par->vram_virt) {
1149 dev_err(&device->dev,
1150 "GLCD: kmalloc for frame buffer failed\n");
1151 ret = -EINVAL;
1152 goto err_release_fb;
1153 }
1154
1155 da8xx_fb_info->screen_base = (char __iomem *) par->vram_virt;
1156 da8xx_fb_fix.smem_start = par->vram_phys;
1157 da8xx_fb_fix.smem_len = par->vram_size;
1158 da8xx_fb_fix.line_length = (lcdc_info->width * lcd_cfg->bpp) / 8;
1159
1160 par->dma_start = par->vram_phys;
1161 par->dma_end = par->dma_start + lcdc_info->height *
1162 da8xx_fb_fix.line_length - 1;
1163
1164 /* allocate palette buffer */
1165 par->v_palette_base = dma_alloc_coherent(NULL,
1166 PALETTE_SIZE,
1167 (resource_size_t *)
1168 &par->p_palette_base,
1169 GFP_KERNEL | GFP_DMA);
1170 if (!par->v_palette_base) {
1171 dev_err(&device->dev,
1172 "GLCD: kmalloc for palette buffer failed\n");
1173 ret = -EINVAL;
1174 goto err_release_fb_mem;
1175 }
1176 memset(par->v_palette_base, 0, PALETTE_SIZE);
1177
1178 par->irq = platform_get_irq(device, 0);
1179 if (par->irq < 0) {
1180 ret = -ENOENT;
1181 goto err_release_pl_mem;
1182 }
1183
1184 /* Initialize par */
1185 da8xx_fb_info->var.bits_per_pixel = lcd_cfg->bpp;
1186
1187 da8xx_fb_var.xres = lcdc_info->width;
1188 da8xx_fb_var.xres_virtual = lcdc_info->width;
1189
1190 da8xx_fb_var.yres = lcdc_info->height;
1191 da8xx_fb_var.yres_virtual = lcdc_info->height * LCD_NUM_BUFFERS;
1192
1193 da8xx_fb_var.grayscale =
1194 lcd_cfg->p_disp_panel->panel_shade == MONOCHROME ? 1 : 0;
1195 da8xx_fb_var.bits_per_pixel = lcd_cfg->bpp;
1196
1197 da8xx_fb_var.hsync_len = lcdc_info->hsw;
1198 da8xx_fb_var.vsync_len = lcdc_info->vsw;
1199
1200 /* Initialize fbinfo */
1201 da8xx_fb_info->flags = FBINFO_FLAG_DEFAULT;
1202 da8xx_fb_info->fix = da8xx_fb_fix;
1203 da8xx_fb_info->var = da8xx_fb_var;
1204 da8xx_fb_info->fbops = &da8xx_fb_ops;
1205 da8xx_fb_info->pseudo_palette = par->pseudo_palette;
1206 da8xx_fb_info->fix.visual = (da8xx_fb_info->var.bits_per_pixel <= 8) ?
1207 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
1208
1209 ret = fb_alloc_cmap(&da8xx_fb_info->cmap, PALETTE_SIZE, 0);
1210 if (ret)
1211 goto err_release_pl_mem;
1212 da8xx_fb_info->cmap.len = par->palette_sz;
1213
1214 /* initialize var_screeninfo */
1215 da8xx_fb_var.activate = FB_ACTIVATE_FORCE;
1216 fb_set_var(da8xx_fb_info, &da8xx_fb_var);
1217
1218 dev_set_drvdata(&device->dev, da8xx_fb_info);
1219
1220 /* initialize the vsync wait queue */
1221 init_waitqueue_head(&par->vsync_wait);
1222 par->vsync_timeout = HZ / 5;
1223
1224 /* Register the Frame Buffer */
1225 if (register_framebuffer(da8xx_fb_info) < 0) {
1226 dev_err(&device->dev,
1227 "GLCD: Frame Buffer Registration Failed!\n");
1228 ret = -EINVAL;
1229 goto err_dealloc_cmap;
1230 }
1231
1232 #ifdef CONFIG_CPU_FREQ
1233 ret = lcd_da8xx_cpufreq_register(par);
1234 if (ret) {
1235 dev_err(&device->dev, "failed to register cpufreq\n");
1236 goto err_cpu_freq;
1237 }
1238 #endif
1239
1240 if (lcd_revision == LCD_VERSION_1)
1241 lcdc_irq_handler = lcdc_irq_handler_rev01;
1242 else
1243 lcdc_irq_handler = lcdc_irq_handler_rev02;
1244
1245 ret = request_irq(par->irq, lcdc_irq_handler, 0,
1246 DRIVER_NAME, par);
1247 if (ret)
1248 goto irq_freq;
1249 return 0;
1250
1251 irq_freq:
1252 #ifdef CONFIG_CPU_FREQ
1253 lcd_da8xx_cpufreq_deregister(par);
1254 #endif
1255 err_cpu_freq:
1256 unregister_framebuffer(da8xx_fb_info);
1257
1258 err_dealloc_cmap:
1259 fb_dealloc_cmap(&da8xx_fb_info->cmap);
1260
1261 err_release_pl_mem:
1262 dma_free_coherent(NULL, PALETTE_SIZE, par->v_palette_base,
1263 par->p_palette_base);
1264
1265 err_release_fb_mem:
1266 dma_free_coherent(NULL, par->vram_size, par->vram_virt, par->vram_phys);
1267
1268 err_release_fb:
1269 framebuffer_release(da8xx_fb_info);
1270
1271 err_clk_disable:
1272 clk_disable(fb_clk);
1273
1274 err_clk_put:
1275 clk_put(fb_clk);
1276
1277 err_ioremap:
1278 iounmap((void __iomem *)da8xx_fb_reg_base);
1279
1280 err_request_mem:
1281 release_mem_region(lcdc_regs->start, len);
1282
1283 return ret;
1284 }
1285
1286 #ifdef CONFIG_PM
1287 static int fb_suspend(struct platform_device *dev, pm_message_t state)
1288 {
1289 struct fb_info *info = platform_get_drvdata(dev);
1290 struct da8xx_fb_par *par = info->par;
1291
1292 console_lock();
1293 if (par->panel_power_ctrl)
1294 par->panel_power_ctrl(0);
1295
1296 fb_set_suspend(info, 1);
1297 lcd_disable_raster();
1298 clk_disable(par->lcdc_clk);
1299 console_unlock();
1300
1301 return 0;
1302 }
1303 static int fb_resume(struct platform_device *dev)
1304 {
1305 struct fb_info *info = platform_get_drvdata(dev);
1306 struct da8xx_fb_par *par = info->par;
1307
1308 console_lock();
1309 if (par->panel_power_ctrl)
1310 par->panel_power_ctrl(1);
1311
1312 clk_enable(par->lcdc_clk);
1313 lcd_enable_raster();
1314 fb_set_suspend(info, 0);
1315 console_unlock();
1316
1317 return 0;
1318 }
1319 #else
1320 #define fb_suspend NULL
1321 #define fb_resume NULL
1322 #endif
1323
1324 static struct platform_driver da8xx_fb_driver = {
1325 .probe = fb_probe,
1326 .remove = __devexit_p(fb_remove),
1327 .suspend = fb_suspend,
1328 .resume = fb_resume,
1329 .driver = {
1330 .name = DRIVER_NAME,
1331 .owner = THIS_MODULE,
1332 },
1333 };
1334
1335 static int __init da8xx_fb_init(void)
1336 {
1337 return platform_driver_register(&da8xx_fb_driver);
1338 }
1339
1340 static void __exit da8xx_fb_cleanup(void)
1341 {
1342 platform_driver_unregister(&da8xx_fb_driver);
1343 }
1344
1345 module_init(da8xx_fb_init);
1346 module_exit(da8xx_fb_cleanup);
1347
1348 MODULE_DESCRIPTION("Framebuffer driver for TI da8xx/omap-l1xx");
1349 MODULE_AUTHOR("Texas Instruments");
1350 MODULE_LICENSE("GPL");