blob: cad7d45c8bac2b94a1e3f06b57a241d26ed4570c [file] [log] [blame]
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -07001/*
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>
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -070029#include <linux/interrupt.h>
30#include <linux/clk.h>
Chaithrika U Se04e5482009-12-15 16:46:29 -080031#include <linux/cpufreq.h>
Chaithrika U S1d3c6c72009-12-15 16:46:39 -080032#include <linux/console.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090033#include <linux/slab.h>
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -070034#include <video/da8xx-fb.h>
35
36#define DRIVER_NAME "da8xx_lcdc"
37
38/* LCD Status Register */
Martin Ambrose1f9c3e12010-05-24 14:34:01 -070039#define LCD_END_OF_FRAME1 BIT(9)
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -070040#define LCD_END_OF_FRAME0 BIT(8)
Martin Ambrose1f9c3e12010-05-24 14:34:01 -070041#define LCD_PL_LOAD_DONE BIT(6)
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -070042#define LCD_FIFO_UNDERFLOW BIT(5)
43#define LCD_SYNC_LOST BIT(2)
44
45/* LCD DMA Control Register */
46#define LCD_DMA_BURST_SIZE(x) ((x) << 4)
47#define LCD_DMA_BURST_1 0x0
48#define LCD_DMA_BURST_2 0x1
49#define LCD_DMA_BURST_4 0x2
50#define LCD_DMA_BURST_8 0x3
51#define LCD_DMA_BURST_16 0x4
52#define LCD_END_OF_FRAME_INT_ENA BIT(2)
53#define LCD_DUAL_FRAME_BUFFER_ENABLE BIT(0)
54
55/* LCD Control Register */
56#define LCD_CLK_DIVISOR(x) ((x) << 8)
57#define LCD_RASTER_MODE 0x01
58
59/* LCD Raster Control Register */
60#define LCD_PALETTE_LOAD_MODE(x) ((x) << 20)
61#define PALETTE_AND_DATA 0x00
62#define PALETTE_ONLY 0x01
Martin Ambrose1f9c3e12010-05-24 14:34:01 -070063#define DATA_ONLY 0x02
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -070064
65#define LCD_MONO_8BIT_MODE BIT(9)
66#define LCD_RASTER_ORDER BIT(8)
67#define LCD_TFT_MODE BIT(7)
68#define LCD_UNDERFLOW_INT_ENA BIT(6)
Martin Ambrose1f9c3e12010-05-24 14:34:01 -070069#define LCD_PL_ENABLE BIT(4)
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -070070#define LCD_MONOCHROME_MODE BIT(1)
71#define LCD_RASTER_ENABLE BIT(0)
72#define LCD_TFT_ALT_ENABLE BIT(23)
73#define LCD_STN_565_ENABLE BIT(24)
74
75/* LCD Raster Timing 2 Register */
76#define LCD_AC_BIAS_TRANSITIONS_PER_INT(x) ((x) << 16)
77#define LCD_AC_BIAS_FREQUENCY(x) ((x) << 8)
78#define LCD_SYNC_CTRL BIT(25)
79#define LCD_SYNC_EDGE BIT(24)
80#define LCD_INVERT_PIXEL_CLOCK BIT(22)
81#define LCD_INVERT_LINE_CLOCK BIT(21)
82#define LCD_INVERT_FRAME_CLOCK BIT(20)
83
84/* LCD Block */
85#define LCD_CTRL_REG 0x4
86#define LCD_STAT_REG 0x8
87#define LCD_RASTER_CTRL_REG 0x28
88#define LCD_RASTER_TIMING_0_REG 0x2C
89#define LCD_RASTER_TIMING_1_REG 0x30
90#define LCD_RASTER_TIMING_2_REG 0x34
91#define LCD_DMA_CTRL_REG 0x40
92#define LCD_DMA_FRM_BUF_BASE_ADDR_0_REG 0x44
93#define LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG 0x48
Martin Ambrose1f9c3e12010-05-24 14:34:01 -070094#define LCD_DMA_FRM_BUF_BASE_ADDR_1_REG 0x4C
95#define LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG 0x50
96
97#define LCD_NUM_BUFFERS 2
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -070098
99#define WSI_TIMEOUT 50
100#define PALETTE_SIZE 256
101#define LEFT_MARGIN 64
102#define RIGHT_MARGIN 64
103#define UPPER_MARGIN 32
104#define LOWER_MARGIN 32
105
106static resource_size_t da8xx_fb_reg_base;
107static struct resource *lcdc_regs;
108
109static inline unsigned int lcdc_read(unsigned int addr)
110{
111 return (unsigned int)__raw_readl(da8xx_fb_reg_base + (addr));
112}
113
114static inline void lcdc_write(unsigned int val, unsigned int addr)
115{
116 __raw_writel(val, da8xx_fb_reg_base + (addr));
117}
118
119struct da8xx_fb_par {
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700120 resource_size_t p_palette_base;
121 unsigned char *v_palette_base;
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700122 dma_addr_t vram_phys;
123 unsigned long vram_size;
124 void *vram_virt;
125 unsigned int dma_start;
126 unsigned int dma_end;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700127 struct clk *lcdc_clk;
128 int irq;
129 unsigned short pseudo_palette[16];
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700130 unsigned int palette_sz;
Chaithrika U S8097b172009-12-15 16:46:29 -0800131 unsigned int pxl_clk;
Chaithrika U S36113802009-12-15 16:46:38 -0800132 int blank;
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700133 wait_queue_head_t vsync_wait;
134 int vsync_flag;
135 int vsync_timeout;
Chaithrika U Se04e5482009-12-15 16:46:29 -0800136#ifdef CONFIG_CPU_FREQ
137 struct notifier_block freq_transition;
138#endif
Chaithrika U S36113802009-12-15 16:46:38 -0800139 void (*panel_power_ctrl)(int);
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700140};
141
142/* Variable Screen Information */
143static struct fb_var_screeninfo da8xx_fb_var __devinitdata = {
144 .xoffset = 0,
145 .yoffset = 0,
146 .transp = {0, 0, 0},
147 .nonstd = 0,
148 .activate = 0,
149 .height = -1,
150 .width = -1,
151 .pixclock = 46666, /* 46us - AUO display */
152 .accel_flags = 0,
153 .left_margin = LEFT_MARGIN,
154 .right_margin = RIGHT_MARGIN,
155 .upper_margin = UPPER_MARGIN,
156 .lower_margin = LOWER_MARGIN,
157 .sync = 0,
158 .vmode = FB_VMODE_NONINTERLACED
159};
160
161static struct fb_fix_screeninfo da8xx_fb_fix __devinitdata = {
162 .id = "DA8xx FB Drv",
163 .type = FB_TYPE_PACKED_PIXELS,
164 .type_aux = 0,
165 .visual = FB_VISUAL_PSEUDOCOLOR,
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700166 .xpanstep = 0,
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700167 .ypanstep = 1,
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700168 .ywrapstep = 0,
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700169 .accel = FB_ACCEL_NONE
170};
171
172struct da8xx_panel {
173 const char name[25]; /* Full name <vendor>_<model> */
174 unsigned short width;
175 unsigned short height;
176 int hfp; /* Horizontal front porch */
177 int hbp; /* Horizontal back porch */
178 int hsw; /* Horizontal Sync Pulse Width */
179 int vfp; /* Vertical front porch */
180 int vbp; /* Vertical back porch */
181 int vsw; /* Vertical Sync Pulse Width */
Chaithrika U S8097b172009-12-15 16:46:29 -0800182 unsigned int pxl_clk; /* Pixel clock */
Sudhakar Rajashekhara2f93e8f2009-09-22 16:47:06 -0700183 unsigned char invert_pxl_clk; /* Invert Pixel clock */
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700184};
185
186static struct da8xx_panel known_lcd_panels[] = {
187 /* Sharp LCD035Q3DG01 */
188 [0] = {
189 .name = "Sharp_LCD035Q3DG01",
190 .width = 320,
191 .height = 240,
192 .hfp = 8,
193 .hbp = 6,
194 .hsw = 0,
195 .vfp = 2,
196 .vbp = 2,
197 .vsw = 0,
Chaithrika U S8097b172009-12-15 16:46:29 -0800198 .pxl_clk = 4608000,
Sudhakar Rajashekhara2f93e8f2009-09-22 16:47:06 -0700199 .invert_pxl_clk = 1,
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700200 },
201 /* Sharp LK043T1DG01 */
202 [1] = {
203 .name = "Sharp_LK043T1DG01",
204 .width = 480,
205 .height = 272,
206 .hfp = 2,
207 .hbp = 2,
208 .hsw = 41,
209 .vfp = 2,
210 .vbp = 2,
211 .vsw = 10,
Chaithrika U S8097b172009-12-15 16:46:29 -0800212 .pxl_clk = 7833600,
Sudhakar Rajashekhara2f93e8f2009-09-22 16:47:06 -0700213 .invert_pxl_clk = 0,
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700214 },
215};
216
Chaithrika U S36113802009-12-15 16:46:38 -0800217/* Enable the Raster Engine of the LCD Controller */
218static inline void lcd_enable_raster(void)
219{
220 u32 reg;
221
222 reg = lcdc_read(LCD_RASTER_CTRL_REG);
223 if (!(reg & LCD_RASTER_ENABLE))
224 lcdc_write(reg | LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
225}
226
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700227/* Disable the Raster Engine of the LCD Controller */
Chaithrika U S36113802009-12-15 16:46:38 -0800228static inline void lcd_disable_raster(void)
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700229{
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700230 u32 reg;
231
232 reg = lcdc_read(LCD_RASTER_CTRL_REG);
Sudhakar Rajashekhara2f93e8f2009-09-22 16:47:06 -0700233 if (reg & LCD_RASTER_ENABLE)
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700234 lcdc_write(reg & ~LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700235}
236
237static void lcd_blit(int load_mode, struct da8xx_fb_par *par)
238{
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700239 u32 start;
240 u32 end;
241 u32 reg_ras;
242 u32 reg_dma;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700243
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700244 /* init reg to clear PLM (loading mode) fields */
245 reg_ras = lcdc_read(LCD_RASTER_CTRL_REG);
246 reg_ras &= ~(3 << 20);
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700247
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700248 reg_dma = lcdc_read(LCD_DMA_CTRL_REG);
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700249
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700250 if (load_mode == LOAD_DATA) {
251 start = par->dma_start;
252 end = par->dma_end;
253
254 reg_ras |= LCD_PALETTE_LOAD_MODE(DATA_ONLY);
255 reg_dma |= LCD_END_OF_FRAME_INT_ENA;
256 reg_dma |= LCD_DUAL_FRAME_BUFFER_ENABLE;
257
258 lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
259 lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
260 lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
261 lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
262 } else if (load_mode == LOAD_PALETTE) {
263 start = par->p_palette_base;
264 end = start + par->palette_sz - 1;
265
266 reg_ras |= LCD_PALETTE_LOAD_MODE(PALETTE_ONLY);
267 reg_ras |= LCD_PL_ENABLE;
268
269 lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
270 lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
271 }
272
273 lcdc_write(reg_dma, LCD_DMA_CTRL_REG);
274 lcdc_write(reg_ras, LCD_RASTER_CTRL_REG);
275
276 /*
277 * The Raster enable bit must be set after all other control fields are
278 * set.
279 */
280 lcd_enable_raster();
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700281}
282
283/* Configure the Burst Size of DMA */
284static int lcd_cfg_dma(int burst_size)
285{
286 u32 reg;
287
288 reg = lcdc_read(LCD_DMA_CTRL_REG) & 0x00000001;
289 switch (burst_size) {
290 case 1:
291 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_1);
292 break;
293 case 2:
294 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_2);
295 break;
296 case 4:
297 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_4);
298 break;
299 case 8:
300 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_8);
301 break;
302 case 16:
303 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_16);
304 break;
305 default:
306 return -EINVAL;
307 }
Sudhakar Rajashekhara2f93e8f2009-09-22 16:47:06 -0700308 lcdc_write(reg, LCD_DMA_CTRL_REG);
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700309
310 return 0;
311}
312
313static void lcd_cfg_ac_bias(int period, int transitions_per_int)
314{
315 u32 reg;
316
317 /* Set the AC Bias Period and Number of Transisitons per Interrupt */
318 reg = lcdc_read(LCD_RASTER_TIMING_2_REG) & 0xFFF00000;
319 reg |= LCD_AC_BIAS_FREQUENCY(period) |
320 LCD_AC_BIAS_TRANSITIONS_PER_INT(transitions_per_int);
321 lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
322}
323
324static void lcd_cfg_horizontal_sync(int back_porch, int pulse_width,
325 int front_porch)
326{
327 u32 reg;
328
329 reg = lcdc_read(LCD_RASTER_TIMING_0_REG) & 0xf;
330 reg |= ((back_porch & 0xff) << 24)
331 | ((front_porch & 0xff) << 16)
332 | ((pulse_width & 0x3f) << 10);
333 lcdc_write(reg, LCD_RASTER_TIMING_0_REG);
334}
335
336static void lcd_cfg_vertical_sync(int back_porch, int pulse_width,
337 int front_porch)
338{
339 u32 reg;
340
341 reg = lcdc_read(LCD_RASTER_TIMING_1_REG) & 0x3ff;
342 reg |= ((back_porch & 0xff) << 24)
343 | ((front_porch & 0xff) << 16)
344 | ((pulse_width & 0x3f) << 10);
345 lcdc_write(reg, LCD_RASTER_TIMING_1_REG);
346}
347
348static int lcd_cfg_display(const struct lcd_ctrl_config *cfg)
349{
350 u32 reg;
351
352 reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(LCD_TFT_MODE |
353 LCD_MONO_8BIT_MODE |
354 LCD_MONOCHROME_MODE);
355
356 switch (cfg->p_disp_panel->panel_shade) {
357 case MONOCHROME:
358 reg |= LCD_MONOCHROME_MODE;
359 if (cfg->mono_8bit_mode)
360 reg |= LCD_MONO_8BIT_MODE;
361 break;
362 case COLOR_ACTIVE:
363 reg |= LCD_TFT_MODE;
364 if (cfg->tft_alt_mode)
365 reg |= LCD_TFT_ALT_ENABLE;
366 break;
367
368 case COLOR_PASSIVE:
369 if (cfg->stn_565_mode)
370 reg |= LCD_STN_565_ENABLE;
371 break;
372
373 default:
374 return -EINVAL;
375 }
376
377 /* enable additional interrupts here */
378 reg |= LCD_UNDERFLOW_INT_ENA;
379
380 lcdc_write(reg, LCD_RASTER_CTRL_REG);
381
382 reg = lcdc_read(LCD_RASTER_TIMING_2_REG);
383
384 if (cfg->sync_ctrl)
385 reg |= LCD_SYNC_CTRL;
386 else
387 reg &= ~LCD_SYNC_CTRL;
388
389 if (cfg->sync_edge)
390 reg |= LCD_SYNC_EDGE;
391 else
392 reg &= ~LCD_SYNC_EDGE;
393
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700394 if (cfg->invert_line_clock)
395 reg |= LCD_INVERT_LINE_CLOCK;
396 else
397 reg &= ~LCD_INVERT_LINE_CLOCK;
398
399 if (cfg->invert_frm_clock)
400 reg |= LCD_INVERT_FRAME_CLOCK;
401 else
402 reg &= ~LCD_INVERT_FRAME_CLOCK;
403
404 lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
405
406 return 0;
407}
408
409static int lcd_cfg_frame_buffer(struct da8xx_fb_par *par, u32 width, u32 height,
410 u32 bpp, u32 raster_order)
411{
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700412 u32 reg;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700413
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700414 /* Set the Panel Width */
415 /* Pixels per line = (PPL + 1)*16 */
416 /*0x3F in bits 4..9 gives max horisontal resolution = 1024 pixels*/
417 width &= 0x3f0;
418 reg = lcdc_read(LCD_RASTER_TIMING_0_REG);
419 reg &= 0xfffffc00;
420 reg |= ((width >> 4) - 1) << 4;
421 lcdc_write(reg, LCD_RASTER_TIMING_0_REG);
422
423 /* Set the Panel Height */
424 reg = lcdc_read(LCD_RASTER_TIMING_1_REG);
425 reg = ((height - 1) & 0x3ff) | (reg & 0xfffffc00);
426 lcdc_write(reg, LCD_RASTER_TIMING_1_REG);
427
428 /* Set the Raster Order of the Frame Buffer */
429 reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(1 << 8);
430 if (raster_order)
431 reg |= LCD_RASTER_ORDER;
432 lcdc_write(reg, LCD_RASTER_CTRL_REG);
433
434 switch (bpp) {
435 case 1:
436 case 2:
437 case 4:
438 case 16:
439 par->palette_sz = 16 * 2;
440 break;
441
442 case 8:
443 par->palette_sz = 256 * 2;
444 break;
445
446 default:
447 return -EINVAL;
448 }
449
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700450 return 0;
451}
452
453static int fb_setcolreg(unsigned regno, unsigned red, unsigned green,
454 unsigned blue, unsigned transp,
455 struct fb_info *info)
456{
457 struct da8xx_fb_par *par = info->par;
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700458 unsigned short *palette = (unsigned short *) par->v_palette_base;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700459 u_short pal;
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700460 int update_hw = 0;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700461
462 if (regno > 255)
463 return 1;
464
465 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR)
466 return 1;
467
468 if (info->var.bits_per_pixel == 8) {
469 red >>= 4;
470 green >>= 8;
471 blue >>= 12;
472
473 pal = (red & 0x0f00);
474 pal |= (green & 0x00f0);
475 pal |= (blue & 0x000f);
476
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700477 if (palette[regno] != pal) {
478 update_hw = 1;
479 palette[regno] = pal;
480 }
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700481 } else if ((info->var.bits_per_pixel == 16) && regno < 16) {
482 red >>= (16 - info->var.red.length);
483 red <<= info->var.red.offset;
484
485 green >>= (16 - info->var.green.length);
486 green <<= info->var.green.offset;
487
488 blue >>= (16 - info->var.blue.length);
489 blue <<= info->var.blue.offset;
490
491 par->pseudo_palette[regno] = red | green | blue;
492
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700493 if (palette[0] != 0x4000) {
494 update_hw = 1;
495 palette[0] = 0x4000;
496 }
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700497 }
498
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700499 /* Update the palette in the h/w as needed. */
500 if (update_hw)
501 lcd_blit(LOAD_PALETTE, par);
502
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700503 return 0;
504}
505
Sudhakar Rajashekhara2f93e8f2009-09-22 16:47:06 -0700506static void lcd_reset(struct da8xx_fb_par *par)
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700507{
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700508 /* Disable the Raster if previously Enabled */
Chaithrika U S36113802009-12-15 16:46:38 -0800509 lcd_disable_raster();
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700510
511 /* DMA has to be disabled */
512 lcdc_write(0, LCD_DMA_CTRL_REG);
513 lcdc_write(0, LCD_RASTER_CTRL_REG);
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700514}
515
Chaithrika U S8097b172009-12-15 16:46:29 -0800516static void lcd_calc_clk_divider(struct da8xx_fb_par *par)
517{
518 unsigned int lcd_clk, div;
519
520 lcd_clk = clk_get_rate(par->lcdc_clk);
521 div = lcd_clk / par->pxl_clk;
522
523 /* Configure the LCD clock divisor. */
524 lcdc_write(LCD_CLK_DIVISOR(div) |
525 (LCD_RASTER_MODE & 0x1), LCD_CTRL_REG);
526}
527
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700528static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg,
529 struct da8xx_panel *panel)
530{
531 u32 bpp;
532 int ret = 0;
533
Sudhakar Rajashekhara2f93e8f2009-09-22 16:47:06 -0700534 lcd_reset(par);
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700535
Chaithrika U S8097b172009-12-15 16:46:29 -0800536 /* Calculate the divider */
537 lcd_calc_clk_divider(par);
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700538
Sudhakar Rajashekhara2f93e8f2009-09-22 16:47:06 -0700539 if (panel->invert_pxl_clk)
540 lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) |
541 LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
542 else
543 lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) &
544 ~LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
545
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700546 /* Configure the DMA burst size. */
547 ret = lcd_cfg_dma(cfg->dma_burst_sz);
548 if (ret < 0)
549 return ret;
550
551 /* Configure the AC bias properties. */
552 lcd_cfg_ac_bias(cfg->ac_bias, cfg->ac_bias_intrpt);
553
554 /* Configure the vertical and horizontal sync properties. */
555 lcd_cfg_vertical_sync(panel->vbp, panel->vsw, panel->vfp);
556 lcd_cfg_horizontal_sync(panel->hbp, panel->hsw, panel->hfp);
557
558 /* Configure for disply */
559 ret = lcd_cfg_display(cfg);
560 if (ret < 0)
561 return ret;
562
563 if (QVGA != cfg->p_disp_panel->panel_type)
564 return -EINVAL;
565
566 if (cfg->bpp <= cfg->p_disp_panel->max_bpp &&
567 cfg->bpp >= cfg->p_disp_panel->min_bpp)
568 bpp = cfg->bpp;
569 else
570 bpp = cfg->p_disp_panel->max_bpp;
571 if (bpp == 12)
572 bpp = 16;
573 ret = lcd_cfg_frame_buffer(par, (unsigned int)panel->width,
574 (unsigned int)panel->height, bpp,
575 cfg->raster_order);
576 if (ret < 0)
577 return ret;
578
579 /* Configure FDD */
580 lcdc_write((lcdc_read(LCD_RASTER_CTRL_REG) & 0xfff00fff) |
581 (cfg->fdd << 12), LCD_RASTER_CTRL_REG);
582
583 return 0;
584}
585
586static irqreturn_t lcdc_irq_handler(int irq, void *arg)
587{
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700588 struct da8xx_fb_par *par = arg;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700589 u32 stat = lcdc_read(LCD_STAT_REG);
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700590 u32 reg_ras;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700591
592 if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
Chaithrika U S36113802009-12-15 16:46:38 -0800593 lcd_disable_raster();
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700594 lcdc_write(stat, LCD_STAT_REG);
Chaithrika U S36113802009-12-15 16:46:38 -0800595 lcd_enable_raster();
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700596 } else if (stat & LCD_PL_LOAD_DONE) {
597 /*
598 * Must disable raster before changing state of any control bit.
599 * And also must be disabled before clearing the PL loading
600 * interrupt via the following write to the status register. If
601 * this is done after then one gets multiple PL done interrupts.
602 */
603 lcd_disable_raster();
604
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700605 lcdc_write(stat, LCD_STAT_REG);
606
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700607 /* Disable PL completion inerrupt */
608 reg_ras = lcdc_read(LCD_RASTER_CTRL_REG);
609 reg_ras &= ~LCD_PL_ENABLE;
610 lcdc_write(reg_ras, LCD_RASTER_CTRL_REG);
611
612 /* Setup and start data loading mode */
613 lcd_blit(LOAD_DATA, par);
614 } else {
615 lcdc_write(stat, LCD_STAT_REG);
616
617 if (stat & LCD_END_OF_FRAME0) {
618 lcdc_write(par->dma_start,
619 LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
620 lcdc_write(par->dma_end,
621 LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
622 par->vsync_flag = 1;
623 wake_up_interruptible(&par->vsync_wait);
624 }
625
626 if (stat & LCD_END_OF_FRAME1) {
627 lcdc_write(par->dma_start,
628 LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
629 lcdc_write(par->dma_end,
630 LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
631 par->vsync_flag = 1;
632 wake_up_interruptible(&par->vsync_wait);
633 }
634 }
635
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700636 return IRQ_HANDLED;
637}
638
639static int fb_check_var(struct fb_var_screeninfo *var,
640 struct fb_info *info)
641{
642 int err = 0;
643
644 switch (var->bits_per_pixel) {
645 case 1:
646 case 8:
647 var->red.offset = 0;
648 var->red.length = 8;
649 var->green.offset = 0;
650 var->green.length = 8;
651 var->blue.offset = 0;
652 var->blue.length = 8;
653 var->transp.offset = 0;
654 var->transp.length = 0;
655 break;
656 case 4:
657 var->red.offset = 0;
658 var->red.length = 4;
659 var->green.offset = 0;
660 var->green.length = 4;
661 var->blue.offset = 0;
662 var->blue.length = 4;
663 var->transp.offset = 0;
664 var->transp.length = 0;
665 break;
666 case 16: /* RGB 565 */
Sudhakar Rajashekhara3510b8f2009-12-01 13:17:43 -0800667 var->red.offset = 11;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700668 var->red.length = 5;
669 var->green.offset = 5;
670 var->green.length = 6;
Sudhakar Rajashekhara3510b8f2009-12-01 13:17:43 -0800671 var->blue.offset = 0;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700672 var->blue.length = 5;
673 var->transp.offset = 0;
674 var->transp.length = 0;
675 break;
676 default:
677 err = -EINVAL;
678 }
679
680 var->red.msb_right = 0;
681 var->green.msb_right = 0;
682 var->blue.msb_right = 0;
683 var->transp.msb_right = 0;
684 return err;
685}
686
Chaithrika U Se04e5482009-12-15 16:46:29 -0800687#ifdef CONFIG_CPU_FREQ
688static int lcd_da8xx_cpufreq_transition(struct notifier_block *nb,
689 unsigned long val, void *data)
690{
691 struct da8xx_fb_par *par;
Chaithrika U Se04e5482009-12-15 16:46:29 -0800692
693 par = container_of(nb, struct da8xx_fb_par, freq_transition);
694 if (val == CPUFREQ_PRECHANGE) {
Chaithrika U S36113802009-12-15 16:46:38 -0800695 lcd_disable_raster();
Chaithrika U Se04e5482009-12-15 16:46:29 -0800696 } else if (val == CPUFREQ_POSTCHANGE) {
697 lcd_calc_clk_divider(par);
Chaithrika U S36113802009-12-15 16:46:38 -0800698 lcd_enable_raster();
Chaithrika U Se04e5482009-12-15 16:46:29 -0800699 }
700
701 return 0;
702}
703
704static inline int lcd_da8xx_cpufreq_register(struct da8xx_fb_par *par)
705{
706 par->freq_transition.notifier_call = lcd_da8xx_cpufreq_transition;
707
708 return cpufreq_register_notifier(&par->freq_transition,
709 CPUFREQ_TRANSITION_NOTIFIER);
710}
711
712static inline void lcd_da8xx_cpufreq_deregister(struct da8xx_fb_par *par)
713{
714 cpufreq_unregister_notifier(&par->freq_transition,
715 CPUFREQ_TRANSITION_NOTIFIER);
716}
717#endif
718
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700719static int __devexit fb_remove(struct platform_device *dev)
720{
721 struct fb_info *info = dev_get_drvdata(&dev->dev);
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700722
723 if (info) {
724 struct da8xx_fb_par *par = info->par;
725
Chaithrika U Se04e5482009-12-15 16:46:29 -0800726#ifdef CONFIG_CPU_FREQ
727 lcd_da8xx_cpufreq_deregister(par);
728#endif
Chaithrika U S36113802009-12-15 16:46:38 -0800729 if (par->panel_power_ctrl)
730 par->panel_power_ctrl(0);
731
732 lcd_disable_raster();
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700733 lcdc_write(0, LCD_RASTER_CTRL_REG);
734
735 /* disable DMA */
736 lcdc_write(0, LCD_DMA_CTRL_REG);
737
738 unregister_framebuffer(info);
739 fb_dealloc_cmap(&info->cmap);
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700740 dma_free_coherent(NULL, PALETTE_SIZE, par->v_palette_base,
741 par->p_palette_base);
742 dma_free_coherent(NULL, par->vram_size, par->vram_virt,
743 par->vram_phys);
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700744 free_irq(par->irq, par);
745 clk_disable(par->lcdc_clk);
746 clk_put(par->lcdc_clk);
747 framebuffer_release(info);
748 iounmap((void __iomem *)da8xx_fb_reg_base);
749 release_mem_region(lcdc_regs->start, resource_size(lcdc_regs));
750
751 }
Sudhakar Rajashekhara2f93e8f2009-09-22 16:47:06 -0700752 return 0;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700753}
754
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700755/*
756 * Function to wait for vertical sync which for this LCD peripheral
757 * translates into waiting for the current raster frame to complete.
758 */
759static int fb_wait_for_vsync(struct fb_info *info)
760{
761 struct da8xx_fb_par *par = info->par;
762 int ret;
763
764 /*
765 * Set flag to 0 and wait for isr to set to 1. It would seem there is a
766 * race condition here where the ISR could have occured just before or
767 * just after this set. But since we are just coarsely waiting for
768 * a frame to complete then that's OK. i.e. if the frame completed
769 * just before this code executed then we have to wait another full
770 * frame time but there is no way to avoid such a situation. On the
771 * other hand if the frame completed just after then we don't need
772 * to wait long at all. Either way we are guaranteed to return to the
773 * user immediately after a frame completion which is all that is
774 * required.
775 */
776 par->vsync_flag = 0;
777 ret = wait_event_interruptible_timeout(par->vsync_wait,
778 par->vsync_flag != 0,
779 par->vsync_timeout);
780 if (ret < 0)
781 return ret;
782 if (ret == 0)
783 return -ETIMEDOUT;
784
785 return 0;
786}
787
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700788static int fb_ioctl(struct fb_info *info, unsigned int cmd,
789 unsigned long arg)
790{
791 struct lcd_sync_arg sync_arg;
792
793 switch (cmd) {
794 case FBIOGET_CONTRAST:
795 case FBIOPUT_CONTRAST:
796 case FBIGET_BRIGHTNESS:
797 case FBIPUT_BRIGHTNESS:
798 case FBIGET_COLOR:
799 case FBIPUT_COLOR:
Sudhakar Rajashekhara2f93e8f2009-09-22 16:47:06 -0700800 return -ENOTTY;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700801 case FBIPUT_HSYNC:
802 if (copy_from_user(&sync_arg, (char *)arg,
803 sizeof(struct lcd_sync_arg)))
Sudhakar Rajashekhara2f93e8f2009-09-22 16:47:06 -0700804 return -EFAULT;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700805 lcd_cfg_horizontal_sync(sync_arg.back_porch,
806 sync_arg.pulse_width,
807 sync_arg.front_porch);
808 break;
809 case FBIPUT_VSYNC:
810 if (copy_from_user(&sync_arg, (char *)arg,
811 sizeof(struct lcd_sync_arg)))
Sudhakar Rajashekhara2f93e8f2009-09-22 16:47:06 -0700812 return -EFAULT;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700813 lcd_cfg_vertical_sync(sync_arg.back_porch,
814 sync_arg.pulse_width,
815 sync_arg.front_porch);
816 break;
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700817 case FBIO_WAITFORVSYNC:
818 return fb_wait_for_vsync(info);
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700819 default:
820 return -EINVAL;
821 }
822 return 0;
823}
824
Chaithrika U S312d9712009-12-15 16:46:39 -0800825static int cfb_blank(int blank, struct fb_info *info)
826{
827 struct da8xx_fb_par *par = info->par;
828 int ret = 0;
829
830 if (par->blank == blank)
831 return 0;
832
833 par->blank = blank;
834 switch (blank) {
835 case FB_BLANK_UNBLANK:
836 if (par->panel_power_ctrl)
837 par->panel_power_ctrl(1);
838
839 lcd_enable_raster();
840 break;
841 case FB_BLANK_POWERDOWN:
842 if (par->panel_power_ctrl)
843 par->panel_power_ctrl(0);
844
845 lcd_disable_raster();
846 break;
847 default:
848 ret = -EINVAL;
849 }
850
851 return ret;
852}
853
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700854/*
855 * Set new x,y offsets in the virtual display for the visible area and switch
856 * to the new mode.
857 */
858static int da8xx_pan_display(struct fb_var_screeninfo *var,
859 struct fb_info *fbi)
860{
861 int ret = 0;
862 struct fb_var_screeninfo new_var;
863 struct da8xx_fb_par *par = fbi->par;
864 struct fb_fix_screeninfo *fix = &fbi->fix;
865 unsigned int end;
866 unsigned int start;
867
868 if (var->xoffset != fbi->var.xoffset ||
869 var->yoffset != fbi->var.yoffset) {
870 memcpy(&new_var, &fbi->var, sizeof(new_var));
871 new_var.xoffset = var->xoffset;
872 new_var.yoffset = var->yoffset;
873 if (fb_check_var(&new_var, fbi))
874 ret = -EINVAL;
875 else {
876 memcpy(&fbi->var, &new_var, sizeof(new_var));
877
878 start = fix->smem_start +
879 new_var.yoffset * fix->line_length +
880 new_var.xoffset * var->bits_per_pixel / 8;
881 end = start + var->yres * fix->line_length - 1;
882 par->dma_start = start;
883 par->dma_end = end;
884 }
885 }
886
887 return ret;
888}
889
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700890static struct fb_ops da8xx_fb_ops = {
891 .owner = THIS_MODULE,
892 .fb_check_var = fb_check_var,
893 .fb_setcolreg = fb_setcolreg,
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700894 .fb_pan_display = da8xx_pan_display,
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700895 .fb_ioctl = fb_ioctl,
896 .fb_fillrect = cfb_fillrect,
897 .fb_copyarea = cfb_copyarea,
898 .fb_imageblit = cfb_imageblit,
Chaithrika U S312d9712009-12-15 16:46:39 -0800899 .fb_blank = cfb_blank,
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700900};
901
902static int __init fb_probe(struct platform_device *device)
903{
904 struct da8xx_lcdc_platform_data *fb_pdata =
905 device->dev.platform_data;
906 struct lcd_ctrl_config *lcd_cfg;
907 struct da8xx_panel *lcdc_info;
908 struct fb_info *da8xx_fb_info;
909 struct clk *fb_clk = NULL;
910 struct da8xx_fb_par *par;
911 resource_size_t len;
912 int ret, i;
913
914 if (fb_pdata == NULL) {
915 dev_err(&device->dev, "Can not get platform data\n");
916 return -ENOENT;
917 }
918
919 lcdc_regs = platform_get_resource(device, IORESOURCE_MEM, 0);
920 if (!lcdc_regs) {
921 dev_err(&device->dev,
922 "Can not get memory resource for LCD controller\n");
923 return -ENOENT;
924 }
925
926 len = resource_size(lcdc_regs);
927
928 lcdc_regs = request_mem_region(lcdc_regs->start, len, lcdc_regs->name);
929 if (!lcdc_regs)
930 return -EBUSY;
931
932 da8xx_fb_reg_base = (resource_size_t)ioremap(lcdc_regs->start, len);
933 if (!da8xx_fb_reg_base) {
934 ret = -EBUSY;
935 goto err_request_mem;
936 }
937
938 fb_clk = clk_get(&device->dev, NULL);
939 if (IS_ERR(fb_clk)) {
940 dev_err(&device->dev, "Can not get device clock\n");
941 ret = -ENODEV;
942 goto err_ioremap;
943 }
944 ret = clk_enable(fb_clk);
945 if (ret)
946 goto err_clk_put;
947
948 for (i = 0, lcdc_info = known_lcd_panels;
949 i < ARRAY_SIZE(known_lcd_panels);
950 i++, lcdc_info++) {
951 if (strcmp(fb_pdata->type, lcdc_info->name) == 0)
952 break;
953 }
954
955 if (i == ARRAY_SIZE(known_lcd_panels)) {
956 dev_err(&device->dev, "GLCD: No valid panel found\n");
Roel Kluindd04a6b2009-11-17 14:06:15 -0800957 ret = -ENODEV;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700958 goto err_clk_disable;
959 } else
960 dev_info(&device->dev, "GLCD: Found %s panel\n",
961 fb_pdata->type);
962
963 lcd_cfg = (struct lcd_ctrl_config *)fb_pdata->controller_data;
964
965 da8xx_fb_info = framebuffer_alloc(sizeof(struct da8xx_fb_par),
966 &device->dev);
967 if (!da8xx_fb_info) {
968 dev_dbg(&device->dev, "Memory allocation failed for fb_info\n");
969 ret = -ENOMEM;
970 goto err_clk_disable;
971 }
972
973 par = da8xx_fb_info->par;
Chaithrika U S8097b172009-12-15 16:46:29 -0800974 par->lcdc_clk = fb_clk;
975 par->pxl_clk = lcdc_info->pxl_clk;
Chaithrika U S36113802009-12-15 16:46:38 -0800976 if (fb_pdata->panel_power_ctrl) {
977 par->panel_power_ctrl = fb_pdata->panel_power_ctrl;
978 par->panel_power_ctrl(1);
979 }
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700980
981 if (lcd_init(par, lcd_cfg, lcdc_info) < 0) {
982 dev_err(&device->dev, "lcd_init failed\n");
983 ret = -EFAULT;
984 goto err_release_fb;
985 }
986
987 /* allocate frame buffer */
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700988 par->vram_size = lcdc_info->width * lcdc_info->height * lcd_cfg->bpp;
989 par->vram_size = PAGE_ALIGN(par->vram_size/8);
990 par->vram_size = par->vram_size * LCD_NUM_BUFFERS;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700991
Martin Ambrose1f9c3e12010-05-24 14:34:01 -0700992 par->vram_virt = dma_alloc_coherent(NULL,
993 par->vram_size,
994 (resource_size_t *) &par->vram_phys,
995 GFP_KERNEL | GFP_DMA);
996 if (!par->vram_virt) {
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -0700997 dev_err(&device->dev,
998 "GLCD: kmalloc for frame buffer failed\n");
999 ret = -EINVAL;
1000 goto err_release_fb;
1001 }
1002
Martin Ambrose1f9c3e12010-05-24 14:34:01 -07001003 da8xx_fb_info->screen_base = (char __iomem *) par->vram_virt;
1004 da8xx_fb_fix.smem_start = par->vram_phys;
1005 da8xx_fb_fix.smem_len = par->vram_size;
1006 da8xx_fb_fix.line_length = (lcdc_info->width * lcd_cfg->bpp) / 8;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -07001007
Martin Ambrose1f9c3e12010-05-24 14:34:01 -07001008 par->dma_start = par->vram_phys;
1009 par->dma_end = par->dma_start + lcdc_info->height *
1010 da8xx_fb_fix.line_length - 1;
1011
1012 /* allocate palette buffer */
1013 par->v_palette_base = dma_alloc_coherent(NULL,
1014 PALETTE_SIZE,
1015 (resource_size_t *)
1016 &par->p_palette_base,
1017 GFP_KERNEL | GFP_DMA);
1018 if (!par->v_palette_base) {
1019 dev_err(&device->dev,
1020 "GLCD: kmalloc for palette buffer failed\n");
1021 ret = -EINVAL;
1022 goto err_release_fb_mem;
1023 }
1024 memset(par->v_palette_base, 0, PALETTE_SIZE);
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -07001025
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -07001026 par->irq = platform_get_irq(device, 0);
1027 if (par->irq < 0) {
1028 ret = -ENOENT;
Martin Ambrose1f9c3e12010-05-24 14:34:01 -07001029 goto err_release_pl_mem;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -07001030 }
1031
1032 ret = request_irq(par->irq, lcdc_irq_handler, 0, DRIVER_NAME, par);
1033 if (ret)
Martin Ambrose1f9c3e12010-05-24 14:34:01 -07001034 goto err_release_pl_mem;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -07001035
1036 /* Initialize par */
1037 da8xx_fb_info->var.bits_per_pixel = lcd_cfg->bpp;
1038
1039 da8xx_fb_var.xres = lcdc_info->width;
1040 da8xx_fb_var.xres_virtual = lcdc_info->width;
1041
Martin Ambrose1f9c3e12010-05-24 14:34:01 -07001042 da8xx_fb_var.yres = lcdc_info->height;
1043 da8xx_fb_var.yres_virtual = lcdc_info->height * LCD_NUM_BUFFERS;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -07001044
1045 da8xx_fb_var.grayscale =
1046 lcd_cfg->p_disp_panel->panel_shade == MONOCHROME ? 1 : 0;
1047 da8xx_fb_var.bits_per_pixel = lcd_cfg->bpp;
1048
1049 da8xx_fb_var.hsync_len = lcdc_info->hsw;
1050 da8xx_fb_var.vsync_len = lcdc_info->vsw;
1051
1052 /* Initialize fbinfo */
1053 da8xx_fb_info->flags = FBINFO_FLAG_DEFAULT;
1054 da8xx_fb_info->fix = da8xx_fb_fix;
1055 da8xx_fb_info->var = da8xx_fb_var;
1056 da8xx_fb_info->fbops = &da8xx_fb_ops;
1057 da8xx_fb_info->pseudo_palette = par->pseudo_palette;
Sudhakar Rajashekhara3510b8f2009-12-01 13:17:43 -08001058 da8xx_fb_info->fix.visual = (da8xx_fb_info->var.bits_per_pixel <= 8) ?
1059 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -07001060
1061 ret = fb_alloc_cmap(&da8xx_fb_info->cmap, PALETTE_SIZE, 0);
1062 if (ret)
1063 goto err_free_irq;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -07001064 da8xx_fb_info->cmap.len = par->palette_sz;
1065
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -07001066 /* initialize var_screeninfo */
1067 da8xx_fb_var.activate = FB_ACTIVATE_FORCE;
1068 fb_set_var(da8xx_fb_info, &da8xx_fb_var);
1069
1070 dev_set_drvdata(&device->dev, da8xx_fb_info);
Martin Ambrose1f9c3e12010-05-24 14:34:01 -07001071
1072 /* initialize the vsync wait queue */
1073 init_waitqueue_head(&par->vsync_wait);
1074 par->vsync_timeout = HZ / 5;
1075
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -07001076 /* Register the Frame Buffer */
1077 if (register_framebuffer(da8xx_fb_info) < 0) {
1078 dev_err(&device->dev,
1079 "GLCD: Frame Buffer Registration Failed!\n");
1080 ret = -EINVAL;
1081 goto err_dealloc_cmap;
1082 }
1083
Chaithrika U Se04e5482009-12-15 16:46:29 -08001084#ifdef CONFIG_CPU_FREQ
1085 ret = lcd_da8xx_cpufreq_register(par);
1086 if (ret) {
1087 dev_err(&device->dev, "failed to register cpufreq\n");
1088 goto err_cpu_freq;
1089 }
1090#endif
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -07001091 return 0;
1092
Chaithrika U Se04e5482009-12-15 16:46:29 -08001093#ifdef CONFIG_CPU_FREQ
1094err_cpu_freq:
1095 unregister_framebuffer(da8xx_fb_info);
1096#endif
1097
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -07001098err_dealloc_cmap:
1099 fb_dealloc_cmap(&da8xx_fb_info->cmap);
1100
1101err_free_irq:
1102 free_irq(par->irq, par);
1103
Martin Ambrose1f9c3e12010-05-24 14:34:01 -07001104err_release_pl_mem:
1105 dma_free_coherent(NULL, PALETTE_SIZE, par->v_palette_base,
1106 par->p_palette_base);
1107
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -07001108err_release_fb_mem:
Martin Ambrose1f9c3e12010-05-24 14:34:01 -07001109 dma_free_coherent(NULL, par->vram_size, par->vram_virt, par->vram_phys);
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -07001110
1111err_release_fb:
1112 framebuffer_release(da8xx_fb_info);
1113
1114err_clk_disable:
1115 clk_disable(fb_clk);
1116
1117err_clk_put:
1118 clk_put(fb_clk);
1119
1120err_ioremap:
1121 iounmap((void __iomem *)da8xx_fb_reg_base);
1122
1123err_request_mem:
1124 release_mem_region(lcdc_regs->start, len);
1125
1126 return ret;
1127}
1128
1129#ifdef CONFIG_PM
1130static int fb_suspend(struct platform_device *dev, pm_message_t state)
1131{
Chaithrika U S1d3c6c72009-12-15 16:46:39 -08001132 struct fb_info *info = platform_get_drvdata(dev);
1133 struct da8xx_fb_par *par = info->par;
1134
1135 acquire_console_sem();
1136 if (par->panel_power_ctrl)
1137 par->panel_power_ctrl(0);
1138
1139 fb_set_suspend(info, 1);
1140 lcd_disable_raster();
1141 clk_disable(par->lcdc_clk);
1142 release_console_sem();
1143
1144 return 0;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -07001145}
1146static int fb_resume(struct platform_device *dev)
1147{
Chaithrika U S1d3c6c72009-12-15 16:46:39 -08001148 struct fb_info *info = platform_get_drvdata(dev);
1149 struct da8xx_fb_par *par = info->par;
1150
1151 acquire_console_sem();
1152 if (par->panel_power_ctrl)
1153 par->panel_power_ctrl(1);
1154
1155 clk_enable(par->lcdc_clk);
1156 lcd_enable_raster();
1157 fb_set_suspend(info, 0);
1158 release_console_sem();
1159
1160 return 0;
Sudhakar Rajashekhara4ed824d2009-09-22 16:47:06 -07001161}
1162#else
1163#define fb_suspend NULL
1164#define fb_resume NULL
1165#endif
1166
1167static struct platform_driver da8xx_fb_driver = {
1168 .probe = fb_probe,
1169 .remove = fb_remove,
1170 .suspend = fb_suspend,
1171 .resume = fb_resume,
1172 .driver = {
1173 .name = DRIVER_NAME,
1174 .owner = THIS_MODULE,
1175 },
1176};
1177
1178static int __init da8xx_fb_init(void)
1179{
1180 return platform_driver_register(&da8xx_fb_driver);
1181}
1182
1183static void __exit da8xx_fb_cleanup(void)
1184{
1185 platform_driver_unregister(&da8xx_fb_driver);
1186}
1187
1188module_init(da8xx_fb_init);
1189module_exit(da8xx_fb_cleanup);
1190
1191MODULE_DESCRIPTION("Framebuffer driver for TI da8xx/omap-l1xx");
1192MODULE_AUTHOR("Texas Instruments");
1193MODULE_LICENSE("GPL");