blob: 3d886c6902f9fe463064ac7d2d39818e36944339 [file] [log] [blame]
Nicolas Ferre14340582007-05-10 22:23:26 -07001/*
2 * Driver for AT91/AT32 LCD Controller
3 *
4 * Copyright (C) 2007 Atmel Corporation
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file COPYING in the main directory of this archive for
8 * more details.
9 */
10
11#include <linux/kernel.h>
12#include <linux/platform_device.h>
13#include <linux/dma-mapping.h>
14#include <linux/interrupt.h>
15#include <linux/clk.h>
16#include <linux/fb.h>
17#include <linux/init.h>
18#include <linux/delay.h>
David Brownella9a84c32008-02-06 01:39:26 -080019#include <linux/backlight.h>
Nicolas Ferre14340582007-05-10 22:23:26 -070020
Russell Kinga09e64f2008-08-05 16:14:15 +010021#include <mach/board.h>
22#include <mach/cpu.h>
23#include <mach/gpio.h>
Nicolas Ferre14340582007-05-10 22:23:26 -070024
25#include <video/atmel_lcdc.h>
26
27#define lcdc_readl(sinfo, reg) __raw_readl((sinfo)->mmio+(reg))
28#define lcdc_writel(sinfo, reg, val) __raw_writel((val), (sinfo)->mmio+(reg))
29
30/* configurable parameters */
31#define ATMEL_LCDC_CVAL_DEFAULT 0xc8
Nicolas Ferre53b74792009-05-28 14:34:36 -070032#define ATMEL_LCDC_DMA_BURST_LEN 8 /* words */
33#define ATMEL_LCDC_FIFO_SIZE 512 /* words */
Nicolas Ferre14340582007-05-10 22:23:26 -070034
35#if defined(CONFIG_ARCH_AT91)
Haavard Skinnemoene730d8b0a2008-08-12 15:08:56 -070036#define ATMEL_LCDFB_FBINFO_DEFAULT (FBINFO_DEFAULT \
37 | FBINFO_PARTIAL_PAN_OK \
38 | FBINFO_HWACCEL_YPAN)
Nicolas Ferre14340582007-05-10 22:23:26 -070039
40static inline void atmel_lcdfb_update_dma2d(struct atmel_lcdfb_info *sinfo,
41 struct fb_var_screeninfo *var)
42{
43
44}
45#elif defined(CONFIG_AVR32)
46#define ATMEL_LCDFB_FBINFO_DEFAULT (FBINFO_DEFAULT \
47 | FBINFO_PARTIAL_PAN_OK \
48 | FBINFO_HWACCEL_XPAN \
49 | FBINFO_HWACCEL_YPAN)
50
51static void atmel_lcdfb_update_dma2d(struct atmel_lcdfb_info *sinfo,
52 struct fb_var_screeninfo *var)
53{
54 u32 dma2dcfg;
55 u32 pixeloff;
56
57 pixeloff = (var->xoffset * var->bits_per_pixel) & 0x1f;
58
59 dma2dcfg = ((var->xres_virtual - var->xres) * var->bits_per_pixel) / 8;
60 dma2dcfg |= pixeloff << ATMEL_LCDC_PIXELOFF_OFFSET;
61 lcdc_writel(sinfo, ATMEL_LCDC_DMA2DCFG, dma2dcfg);
62
63 /* Update configuration */
64 lcdc_writel(sinfo, ATMEL_LCDC_DMACON,
65 lcdc_readl(sinfo, ATMEL_LCDC_DMACON)
66 | ATMEL_LCDC_DMAUPDT);
67}
68#endif
69
David Brownella9a84c32008-02-06 01:39:26 -080070static const u32 contrast_ctr = ATMEL_LCDC_PS_DIV8
71 | ATMEL_LCDC_POL_POSITIVE
72 | ATMEL_LCDC_ENA_PWMENABLE;
73
74#ifdef CONFIG_BACKLIGHT_ATMEL_LCDC
75
76/* some bl->props field just changed */
77static int atmel_bl_update_status(struct backlight_device *bl)
78{
79 struct atmel_lcdfb_info *sinfo = bl_get_data(bl);
80 int power = sinfo->bl_power;
81 int brightness = bl->props.brightness;
82
83 /* REVISIT there may be a meaningful difference between
84 * fb_blank and power ... there seem to be some cases
85 * this doesn't handle correctly.
86 */
87 if (bl->props.fb_blank != sinfo->bl_power)
88 power = bl->props.fb_blank;
89 else if (bl->props.power != sinfo->bl_power)
90 power = bl->props.power;
91
92 if (brightness < 0 && power == FB_BLANK_UNBLANK)
93 brightness = lcdc_readl(sinfo, ATMEL_LCDC_CONTRAST_VAL);
94 else if (power != FB_BLANK_UNBLANK)
95 brightness = 0;
96
97 lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_VAL, brightness);
98 lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR,
99 brightness ? contrast_ctr : 0);
100
101 bl->props.fb_blank = bl->props.power = sinfo->bl_power = power;
102
103 return 0;
104}
105
106static int atmel_bl_get_brightness(struct backlight_device *bl)
107{
108 struct atmel_lcdfb_info *sinfo = bl_get_data(bl);
109
110 return lcdc_readl(sinfo, ATMEL_LCDC_CONTRAST_VAL);
111}
112
113static struct backlight_ops atmel_lcdc_bl_ops = {
114 .update_status = atmel_bl_update_status,
115 .get_brightness = atmel_bl_get_brightness,
116};
117
118static void init_backlight(struct atmel_lcdfb_info *sinfo)
119{
120 struct backlight_device *bl;
121
122 sinfo->bl_power = FB_BLANK_UNBLANK;
123
124 if (sinfo->backlight)
125 return;
126
127 bl = backlight_device_register("backlight", &sinfo->pdev->dev,
128 sinfo, &atmel_lcdc_bl_ops);
Julien Brunelcf7b9a12008-11-19 15:36:07 -0800129 if (IS_ERR(bl)) {
David Brownella9a84c32008-02-06 01:39:26 -0800130 dev_err(&sinfo->pdev->dev, "error %ld on backlight register\n",
131 PTR_ERR(bl));
132 return;
133 }
134 sinfo->backlight = bl;
135
136 bl->props.power = FB_BLANK_UNBLANK;
137 bl->props.fb_blank = FB_BLANK_UNBLANK;
138 bl->props.max_brightness = 0xff;
139 bl->props.brightness = atmel_bl_get_brightness(bl);
140}
141
142static void exit_backlight(struct atmel_lcdfb_info *sinfo)
143{
144 if (sinfo->backlight)
145 backlight_device_unregister(sinfo->backlight);
146}
147
148#else
149
150static void init_backlight(struct atmel_lcdfb_info *sinfo)
151{
152 dev_warn(&sinfo->pdev->dev, "backlight control is not available\n");
153}
154
155static void exit_backlight(struct atmel_lcdfb_info *sinfo)
156{
157}
158
159#endif
160
161static void init_contrast(struct atmel_lcdfb_info *sinfo)
162{
163 /* have some default contrast/backlight settings */
164 lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, contrast_ctr);
165 lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_VAL, ATMEL_LCDC_CVAL_DEFAULT);
166
167 if (sinfo->lcdcon_is_backlight)
168 init_backlight(sinfo);
169}
170
Nicolas Ferre14340582007-05-10 22:23:26 -0700171
172static struct fb_fix_screeninfo atmel_lcdfb_fix __initdata = {
173 .type = FB_TYPE_PACKED_PIXELS,
174 .visual = FB_VISUAL_TRUECOLOR,
175 .xpanstep = 0,
Haavard Skinnemoene730d8b0a2008-08-12 15:08:56 -0700176 .ypanstep = 1,
Nicolas Ferre14340582007-05-10 22:23:26 -0700177 .ywrapstep = 0,
178 .accel = FB_ACCEL_NONE,
179};
180
Nicolas Ferre250a2692007-07-21 04:37:59 -0700181static unsigned long compute_hozval(unsigned long xres, unsigned long lcdcon2)
182{
183 unsigned long value;
184
Nicolas Ferre915190f2009-07-21 11:31:29 +0100185 if (!(cpu_is_at91sam9261() || cpu_is_at91sam9g10()
186 || cpu_is_at32ap7000()))
Nicolas Ferre250a2692007-07-21 04:37:59 -0700187 return xres;
188
189 value = xres;
190 if ((lcdcon2 & ATMEL_LCDC_DISTYPE) != ATMEL_LCDC_DISTYPE_TFT) {
191 /* STN display */
192 if ((lcdcon2 & ATMEL_LCDC_DISTYPE) == ATMEL_LCDC_DISTYPE_STNCOLOR) {
193 value *= 3;
194 }
195 if ( (lcdcon2 & ATMEL_LCDC_IFWIDTH) == ATMEL_LCDC_IFWIDTH_4
196 || ( (lcdcon2 & ATMEL_LCDC_IFWIDTH) == ATMEL_LCDC_IFWIDTH_8
197 && (lcdcon2 & ATMEL_LCDC_SCANMOD) == ATMEL_LCDC_SCANMOD_DUAL ))
198 value = DIV_ROUND_UP(value, 4);
199 else
200 value = DIV_ROUND_UP(value, 8);
201 }
202
203 return value;
204}
Nicolas Ferre14340582007-05-10 22:23:26 -0700205
Haavard Skinnemoen3aa04f12008-09-13 02:33:23 -0700206static void atmel_lcdfb_stop_nowait(struct atmel_lcdfb_info *sinfo)
207{
208 /* Turn off the LCD controller and the DMA controller */
209 lcdc_writel(sinfo, ATMEL_LCDC_PWRCON,
210 sinfo->guard_time << ATMEL_LCDC_GUARDT_OFFSET);
211
212 /* Wait for the LCDC core to become idle */
213 while (lcdc_readl(sinfo, ATMEL_LCDC_PWRCON) & ATMEL_LCDC_BUSY)
214 msleep(10);
215
216 lcdc_writel(sinfo, ATMEL_LCDC_DMACON, 0);
217}
218
219static void atmel_lcdfb_stop(struct atmel_lcdfb_info *sinfo)
220{
221 atmel_lcdfb_stop_nowait(sinfo);
222
223 /* Wait for DMA engine to become idle... */
224 while (lcdc_readl(sinfo, ATMEL_LCDC_DMACON) & ATMEL_LCDC_DMABUSY)
225 msleep(10);
226}
227
228static void atmel_lcdfb_start(struct atmel_lcdfb_info *sinfo)
229{
230 lcdc_writel(sinfo, ATMEL_LCDC_DMACON, sinfo->default_dmacon);
231 lcdc_writel(sinfo, ATMEL_LCDC_PWRCON,
232 (sinfo->guard_time << ATMEL_LCDC_GUARDT_OFFSET)
233 | ATMEL_LCDC_PWR);
234}
235
Nicolas Ferre14340582007-05-10 22:23:26 -0700236static void atmel_lcdfb_update_dma(struct fb_info *info,
237 struct fb_var_screeninfo *var)
238{
239 struct atmel_lcdfb_info *sinfo = info->par;
240 struct fb_fix_screeninfo *fix = &info->fix;
241 unsigned long dma_addr;
242
243 dma_addr = (fix->smem_start + var->yoffset * fix->line_length
244 + var->xoffset * var->bits_per_pixel / 8);
245
246 dma_addr &= ~3UL;
247
248 /* Set framebuffer DMA base address and pixel offset */
249 lcdc_writel(sinfo, ATMEL_LCDC_DMABADDR1, dma_addr);
250
251 atmel_lcdfb_update_dma2d(sinfo, var);
252}
253
254static inline void atmel_lcdfb_free_video_memory(struct atmel_lcdfb_info *sinfo)
255{
256 struct fb_info *info = sinfo->info;
257
258 dma_free_writecombine(info->device, info->fix.smem_len,
259 info->screen_base, info->fix.smem_start);
260}
261
262/**
263 * atmel_lcdfb_alloc_video_memory - Allocate framebuffer memory
264 * @sinfo: the frame buffer to allocate memory for
Krzysztof Helt1d01e832009-07-08 22:26:16 +0200265 *
266 * This function is called only from the atmel_lcdfb_probe()
267 * so no locking by fb_info->mm_lock around smem_len setting is needed.
Nicolas Ferre14340582007-05-10 22:23:26 -0700268 */
269static int atmel_lcdfb_alloc_video_memory(struct atmel_lcdfb_info *sinfo)
270{
271 struct fb_info *info = sinfo->info;
272 struct fb_var_screeninfo *var = &info->var;
Haavard Skinnemoenea757ac2008-08-12 15:08:57 -0700273 unsigned int smem_len;
Nicolas Ferre14340582007-05-10 22:23:26 -0700274
Haavard Skinnemoenea757ac2008-08-12 15:08:57 -0700275 smem_len = (var->xres_virtual * var->yres_virtual
276 * ((var->bits_per_pixel + 7) / 8));
277 info->fix.smem_len = max(smem_len, sinfo->smem_len);
Nicolas Ferre14340582007-05-10 22:23:26 -0700278
279 info->screen_base = dma_alloc_writecombine(info->device, info->fix.smem_len,
280 (dma_addr_t *)&info->fix.smem_start, GFP_KERNEL);
281
282 if (!info->screen_base) {
283 return -ENOMEM;
284 }
285
Haavard Skinnemoen01d3a5e2008-04-28 02:15:19 -0700286 memset(info->screen_base, 0, info->fix.smem_len);
287
Nicolas Ferre14340582007-05-10 22:23:26 -0700288 return 0;
289}
290
Nicolas Ferre968910b2008-07-23 21:31:34 -0700291static const struct fb_videomode *atmel_lcdfb_choose_mode(struct fb_var_screeninfo *var,
292 struct fb_info *info)
293{
294 struct fb_videomode varfbmode;
295 const struct fb_videomode *fbmode = NULL;
296
297 fb_var_to_videomode(&varfbmode, var);
298 fbmode = fb_find_nearest_mode(&varfbmode, &info->modelist);
299 if (fbmode)
300 fb_videomode_to_var(var, fbmode);
301 return fbmode;
302}
303
304
Nicolas Ferre14340582007-05-10 22:23:26 -0700305/**
306 * atmel_lcdfb_check_var - Validates a var passed in.
307 * @var: frame buffer variable screen structure
308 * @info: frame buffer structure that represents a single frame buffer
309 *
310 * Checks to see if the hardware supports the state requested by
311 * var passed in. This function does not alter the hardware
312 * state!!! This means the data stored in struct fb_info and
313 * struct atmel_lcdfb_info do not change. This includes the var
314 * inside of struct fb_info. Do NOT change these. This function
315 * can be called on its own if we intent to only test a mode and
316 * not actually set it. The stuff in modedb.c is a example of
317 * this. If the var passed in is slightly off by what the
318 * hardware can support then we alter the var PASSED in to what
319 * we can do. If the hardware doesn't support mode change a
320 * -EINVAL will be returned by the upper layers. You don't need
321 * to implement this function then. If you hardware doesn't
322 * support changing the resolution then this function is not
323 * needed. In this case the driver would just provide a var that
324 * represents the static state the screen is in.
325 *
326 * Returns negative errno on error, or zero on success.
327 */
328static int atmel_lcdfb_check_var(struct fb_var_screeninfo *var,
329 struct fb_info *info)
330{
331 struct device *dev = info->device;
332 struct atmel_lcdfb_info *sinfo = info->par;
333 unsigned long clk_value_khz;
334
335 clk_value_khz = clk_get_rate(sinfo->lcdc_clk) / 1000;
336
337 dev_dbg(dev, "%s:\n", __func__);
Nicolas Ferre968910b2008-07-23 21:31:34 -0700338
339 if (!(var->pixclock && var->bits_per_pixel)) {
340 /* choose a suitable mode if possible */
341 if (!atmel_lcdfb_choose_mode(var, info)) {
342 dev_err(dev, "needed value not specified\n");
343 return -EINVAL;
344 }
345 }
346
Nicolas Ferre14340582007-05-10 22:23:26 -0700347 dev_dbg(dev, " resolution: %ux%u\n", var->xres, var->yres);
348 dev_dbg(dev, " pixclk: %lu KHz\n", PICOS2KHZ(var->pixclock));
349 dev_dbg(dev, " bpp: %u\n", var->bits_per_pixel);
350 dev_dbg(dev, " clk: %lu KHz\n", clk_value_khz);
351
Ben Nizette97b9a5a2009-06-16 15:34:24 -0700352 if (PICOS2KHZ(var->pixclock) > clk_value_khz) {
Nicolas Ferre14340582007-05-10 22:23:26 -0700353 dev_err(dev, "%lu KHz pixel clock is too fast\n", PICOS2KHZ(var->pixclock));
354 return -EINVAL;
355 }
356
Nicolas Ferre968910b2008-07-23 21:31:34 -0700357 /* Do not allow to have real resoulution larger than virtual */
358 if (var->xres > var->xres_virtual)
359 var->xres_virtual = var->xres;
360
361 if (var->yres > var->yres_virtual)
362 var->yres_virtual = var->yres;
363
Nicolas Ferre14340582007-05-10 22:23:26 -0700364 /* Force same alignment for each line */
365 var->xres = (var->xres + 3) & ~3UL;
366 var->xres_virtual = (var->xres_virtual + 3) & ~3UL;
367
368 var->red.msb_right = var->green.msb_right = var->blue.msb_right = 0;
369 var->transp.msb_right = 0;
370 var->transp.offset = var->transp.length = 0;
371 var->xoffset = var->yoffset = 0;
372
Stanislaw Gruszkaf928ac0a2008-10-15 22:03:43 -0700373 if (info->fix.smem_len) {
374 unsigned int smem_len = (var->xres_virtual * var->yres_virtual
375 * ((var->bits_per_pixel + 7) / 8));
376 if (smem_len > info->fix.smem_len)
377 return -EINVAL;
378 }
379
Haavard Skinnemoen162b3a02008-02-06 01:39:11 -0800380 /* Saturate vertical and horizontal timings at maximum values */
381 var->vsync_len = min_t(u32, var->vsync_len,
382 (ATMEL_LCDC_VPW >> ATMEL_LCDC_VPW_OFFSET) + 1);
383 var->upper_margin = min_t(u32, var->upper_margin,
384 ATMEL_LCDC_VBP >> ATMEL_LCDC_VBP_OFFSET);
385 var->lower_margin = min_t(u32, var->lower_margin,
386 ATMEL_LCDC_VFP);
387 var->right_margin = min_t(u32, var->right_margin,
388 (ATMEL_LCDC_HFP >> ATMEL_LCDC_HFP_OFFSET) + 1);
389 var->hsync_len = min_t(u32, var->hsync_len,
390 (ATMEL_LCDC_HPW >> ATMEL_LCDC_HPW_OFFSET) + 1);
391 var->left_margin = min_t(u32, var->left_margin,
392 ATMEL_LCDC_HBP + 1);
393
394 /* Some parameters can't be zero */
395 var->vsync_len = max_t(u32, var->vsync_len, 1);
396 var->right_margin = max_t(u32, var->right_margin, 1);
397 var->hsync_len = max_t(u32, var->hsync_len, 1);
398 var->left_margin = max_t(u32, var->left_margin, 1);
399
Nicolas Ferre14340582007-05-10 22:23:26 -0700400 switch (var->bits_per_pixel) {
Nicolas Ferre250a2692007-07-21 04:37:59 -0700401 case 1:
Nicolas Ferre14340582007-05-10 22:23:26 -0700402 case 2:
403 case 4:
404 case 8:
405 var->red.offset = var->green.offset = var->blue.offset = 0;
406 var->red.length = var->green.length = var->blue.length
407 = var->bits_per_pixel;
408 break;
409 case 15:
410 case 16:
Nicolas Ferrefd085802008-04-28 02:15:21 -0700411 if (sinfo->lcd_wiring_mode == ATMEL_LCDC_WIRING_RGB) {
412 /* RGB:565 mode */
413 var->red.offset = 11;
414 var->blue.offset = 0;
415 var->green.length = 6;
Guillaume GARDETfbd03a12008-08-29 10:11:24 +0100416 } else if (sinfo->lcd_wiring_mode == ATMEL_LCDC_WIRING_RGB555) {
417 var->red.offset = 10;
418 var->blue.offset = 0;
419 var->green.length = 5;
Nicolas Ferrefd085802008-04-28 02:15:21 -0700420 } else {
421 /* BGR:555 mode */
422 var->red.offset = 0;
423 var->blue.offset = 10;
424 var->green.length = 5;
425 }
Nicolas Ferre14340582007-05-10 22:23:26 -0700426 var->green.offset = 5;
Nicolas Ferrefd085802008-04-28 02:15:21 -0700427 var->red.length = var->blue.length = 5;
Nicolas Ferre14340582007-05-10 22:23:26 -0700428 break;
Nicolas Ferre14340582007-05-10 22:23:26 -0700429 case 32:
Haavard Skinnemoen4440e0e2007-07-21 04:38:02 -0700430 var->transp.offset = 24;
431 var->transp.length = 8;
432 /* fall through */
433 case 24:
Nicolas Ferrefd085802008-04-28 02:15:21 -0700434 if (sinfo->lcd_wiring_mode == ATMEL_LCDC_WIRING_RGB) {
435 /* RGB:888 mode */
436 var->red.offset = 16;
437 var->blue.offset = 0;
438 } else {
439 /* BGR:888 mode */
440 var->red.offset = 0;
441 var->blue.offset = 16;
442 }
Nicolas Ferre14340582007-05-10 22:23:26 -0700443 var->green.offset = 8;
Nicolas Ferre14340582007-05-10 22:23:26 -0700444 var->red.length = var->green.length = var->blue.length = 8;
445 break;
446 default:
447 dev_err(dev, "color depth %d not supported\n",
448 var->bits_per_pixel);
449 return -EINVAL;
450 }
451
452 return 0;
453}
454
Nicolas Ferred22579b2008-07-23 21:31:20 -0700455/*
456 * LCD reset sequence
457 */
458static void atmel_lcdfb_reset(struct atmel_lcdfb_info *sinfo)
459{
460 might_sleep();
461
Haavard Skinnemoen3aa04f12008-09-13 02:33:23 -0700462 atmel_lcdfb_stop(sinfo);
463 atmel_lcdfb_start(sinfo);
Nicolas Ferred22579b2008-07-23 21:31:20 -0700464}
465
Nicolas Ferre14340582007-05-10 22:23:26 -0700466/**
467 * atmel_lcdfb_set_par - Alters the hardware state.
468 * @info: frame buffer structure that represents a single frame buffer
469 *
470 * Using the fb_var_screeninfo in fb_info we set the resolution
471 * of the this particular framebuffer. This function alters the
472 * par AND the fb_fix_screeninfo stored in fb_info. It doesn't
473 * not alter var in fb_info since we are using that data. This
474 * means we depend on the data in var inside fb_info to be
475 * supported by the hardware. atmel_lcdfb_check_var is always called
476 * before atmel_lcdfb_set_par to ensure this. Again if you can't
477 * change the resolution you don't need this function.
478 *
479 */
480static int atmel_lcdfb_set_par(struct fb_info *info)
481{
482 struct atmel_lcdfb_info *sinfo = info->par;
Nicolas Ferre250a2692007-07-21 04:37:59 -0700483 unsigned long hozval_linesz;
Nicolas Ferre14340582007-05-10 22:23:26 -0700484 unsigned long value;
485 unsigned long clk_value_khz;
Nicolas Ferre250a2692007-07-21 04:37:59 -0700486 unsigned long bits_per_line;
Nicolas Ferre431861c2009-11-11 14:26:35 -0800487 unsigned long pix_factor = 2;
Nicolas Ferre14340582007-05-10 22:23:26 -0700488
Nicolas Ferred22579b2008-07-23 21:31:20 -0700489 might_sleep();
490
Nicolas Ferre14340582007-05-10 22:23:26 -0700491 dev_dbg(info->device, "%s:\n", __func__);
492 dev_dbg(info->device, " * resolution: %ux%u (%ux%u virtual)\n",
493 info->var.xres, info->var.yres,
494 info->var.xres_virtual, info->var.yres_virtual);
495
Haavard Skinnemoen3aa04f12008-09-13 02:33:23 -0700496 atmel_lcdfb_stop_nowait(sinfo);
Nicolas Ferre14340582007-05-10 22:23:26 -0700497
Nicolas Ferre250a2692007-07-21 04:37:59 -0700498 if (info->var.bits_per_pixel == 1)
499 info->fix.visual = FB_VISUAL_MONO01;
500 else if (info->var.bits_per_pixel <= 8)
Nicolas Ferre14340582007-05-10 22:23:26 -0700501 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
502 else
503 info->fix.visual = FB_VISUAL_TRUECOLOR;
504
Nicolas Ferre250a2692007-07-21 04:37:59 -0700505 bits_per_line = info->var.xres_virtual * info->var.bits_per_pixel;
506 info->fix.line_length = DIV_ROUND_UP(bits_per_line, 8);
Nicolas Ferre14340582007-05-10 22:23:26 -0700507
508 /* Re-initialize the DMA engine... */
509 dev_dbg(info->device, " * update DMA engine\n");
510 atmel_lcdfb_update_dma(info, &info->var);
511
512 /* ...set frame size and burst length = 8 words (?) */
513 value = (info->var.yres * info->var.xres * info->var.bits_per_pixel) / 32;
514 value |= ((ATMEL_LCDC_DMA_BURST_LEN - 1) << ATMEL_LCDC_BLENGTH_OFFSET);
515 lcdc_writel(sinfo, ATMEL_LCDC_DMAFRMCFG, value);
516
517 /* Now, the LCDC core... */
518
519 /* Set pixel clock */
Nicolas Ferre431861c2009-11-11 14:26:35 -0800520 if (cpu_is_at91sam9g45() && !cpu_is_at91sam9g45es())
521 pix_factor = 1;
522
Nicolas Ferre14340582007-05-10 22:23:26 -0700523 clk_value_khz = clk_get_rate(sinfo->lcdc_clk) / 1000;
524
Nicolas Ferre250a2692007-07-21 04:37:59 -0700525 value = DIV_ROUND_UP(clk_value_khz, PICOS2KHZ(info->var.pixclock));
Nicolas Ferre14340582007-05-10 22:23:26 -0700526
Nicolas Ferre431861c2009-11-11 14:26:35 -0800527 if (value < pix_factor) {
Nicolas Ferre14340582007-05-10 22:23:26 -0700528 dev_notice(info->device, "Bypassing pixel clock divider\n");
529 lcdc_writel(sinfo, ATMEL_LCDC_LCDCON1, ATMEL_LCDC_BYPASS);
Nicolas Ferre250a2692007-07-21 04:37:59 -0700530 } else {
Nicolas Ferre431861c2009-11-11 14:26:35 -0800531 value = (value / pix_factor) - 1;
Nicolas Ferrebaf63322008-05-12 14:02:25 -0700532 dev_dbg(info->device, " * programming CLKVAL = 0x%08lx\n",
533 value);
534 lcdc_writel(sinfo, ATMEL_LCDC_LCDCON1,
535 value << ATMEL_LCDC_CLKVAL_OFFSET);
Nicolas Ferre431861c2009-11-11 14:26:35 -0800536 info->var.pixclock =
537 KHZ2PICOS(clk_value_khz / (pix_factor * (value + 1)));
Nicolas Ferre250a2692007-07-21 04:37:59 -0700538 dev_dbg(info->device, " updated pixclk: %lu KHz\n",
539 PICOS2KHZ(info->var.pixclock));
540 }
541
Nicolas Ferre14340582007-05-10 22:23:26 -0700542
543 /* Initialize control register 2 */
544 value = sinfo->default_lcdcon2;
545
546 if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
547 value |= ATMEL_LCDC_INVLINE_INVERTED;
548 if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
549 value |= ATMEL_LCDC_INVFRAME_INVERTED;
550
551 switch (info->var.bits_per_pixel) {
552 case 1: value |= ATMEL_LCDC_PIXELSIZE_1; break;
553 case 2: value |= ATMEL_LCDC_PIXELSIZE_2; break;
554 case 4: value |= ATMEL_LCDC_PIXELSIZE_4; break;
555 case 8: value |= ATMEL_LCDC_PIXELSIZE_8; break;
556 case 15: /* fall through */
557 case 16: value |= ATMEL_LCDC_PIXELSIZE_16; break;
558 case 24: value |= ATMEL_LCDC_PIXELSIZE_24; break;
559 case 32: value |= ATMEL_LCDC_PIXELSIZE_32; break;
560 default: BUG(); break;
561 }
562 dev_dbg(info->device, " * LCDCON2 = %08lx\n", value);
563 lcdc_writel(sinfo, ATMEL_LCDC_LCDCON2, value);
564
565 /* Vertical timing */
566 value = (info->var.vsync_len - 1) << ATMEL_LCDC_VPW_OFFSET;
567 value |= info->var.upper_margin << ATMEL_LCDC_VBP_OFFSET;
568 value |= info->var.lower_margin;
569 dev_dbg(info->device, " * LCDTIM1 = %08lx\n", value);
570 lcdc_writel(sinfo, ATMEL_LCDC_TIM1, value);
571
572 /* Horizontal timing */
573 value = (info->var.right_margin - 1) << ATMEL_LCDC_HFP_OFFSET;
574 value |= (info->var.hsync_len - 1) << ATMEL_LCDC_HPW_OFFSET;
575 value |= (info->var.left_margin - 1);
576 dev_dbg(info->device, " * LCDTIM2 = %08lx\n", value);
577 lcdc_writel(sinfo, ATMEL_LCDC_TIM2, value);
578
Nicolas Ferre250a2692007-07-21 04:37:59 -0700579 /* Horizontal value (aka line size) */
580 hozval_linesz = compute_hozval(info->var.xres,
581 lcdc_readl(sinfo, ATMEL_LCDC_LCDCON2));
582
Nicolas Ferre14340582007-05-10 22:23:26 -0700583 /* Display size */
Nicolas Ferre250a2692007-07-21 04:37:59 -0700584 value = (hozval_linesz - 1) << ATMEL_LCDC_HOZVAL_OFFSET;
Nicolas Ferre14340582007-05-10 22:23:26 -0700585 value |= info->var.yres - 1;
Nicolas Ferre250a2692007-07-21 04:37:59 -0700586 dev_dbg(info->device, " * LCDFRMCFG = %08lx\n", value);
Nicolas Ferre14340582007-05-10 22:23:26 -0700587 lcdc_writel(sinfo, ATMEL_LCDC_LCDFRMCFG, value);
588
589 /* FIFO Threshold: Use formula from data sheet */
590 value = ATMEL_LCDC_FIFO_SIZE - (2 * ATMEL_LCDC_DMA_BURST_LEN + 3);
591 lcdc_writel(sinfo, ATMEL_LCDC_FIFO, value);
592
593 /* Toggle LCD_MODE every frame */
594 lcdc_writel(sinfo, ATMEL_LCDC_MVAL, 0);
595
596 /* Disable all interrupts */
597 lcdc_writel(sinfo, ATMEL_LCDC_IDR, ~0UL);
Nicolas Ferred22579b2008-07-23 21:31:20 -0700598 /* Enable FIFO & DMA errors */
599 lcdc_writel(sinfo, ATMEL_LCDC_IER, ATMEL_LCDC_UFLWI | ATMEL_LCDC_OWRI | ATMEL_LCDC_MERI);
Nicolas Ferre14340582007-05-10 22:23:26 -0700600
Nicolas Ferre14340582007-05-10 22:23:26 -0700601 /* ...wait for DMA engine to become idle... */
602 while (lcdc_readl(sinfo, ATMEL_LCDC_DMACON) & ATMEL_LCDC_DMABUSY)
603 msleep(10);
604
Haavard Skinnemoen3aa04f12008-09-13 02:33:23 -0700605 atmel_lcdfb_start(sinfo);
Nicolas Ferre14340582007-05-10 22:23:26 -0700606
607 dev_dbg(info->device, " * DONE\n");
608
609 return 0;
610}
611
612static inline unsigned int chan_to_field(unsigned int chan, const struct fb_bitfield *bf)
613{
614 chan &= 0xffff;
615 chan >>= 16 - bf->length;
616 return chan << bf->offset;
617}
618
619/**
620 * atmel_lcdfb_setcolreg - Optional function. Sets a color register.
621 * @regno: Which register in the CLUT we are programming
622 * @red: The red value which can be up to 16 bits wide
623 * @green: The green value which can be up to 16 bits wide
624 * @blue: The blue value which can be up to 16 bits wide.
625 * @transp: If supported the alpha value which can be up to 16 bits wide.
626 * @info: frame buffer info structure
627 *
628 * Set a single color register. The values supplied have a 16 bit
629 * magnitude which needs to be scaled in this function for the hardware.
630 * Things to take into consideration are how many color registers, if
631 * any, are supported with the current color visual. With truecolor mode
632 * no color palettes are supported. Here a psuedo palette is created
633 * which we store the value in pseudo_palette in struct fb_info. For
634 * pseudocolor mode we have a limited color palette. To deal with this
635 * we can program what color is displayed for a particular pixel value.
636 * DirectColor is similar in that we can program each color field. If
637 * we have a static colormap we don't need to implement this function.
638 *
639 * Returns negative errno on error, or zero on success. In an
640 * ideal world, this would have been the case, but as it turns
641 * out, the other drivers return 1 on failure, so that's what
642 * we're going to do.
643 */
644static int atmel_lcdfb_setcolreg(unsigned int regno, unsigned int red,
645 unsigned int green, unsigned int blue,
646 unsigned int transp, struct fb_info *info)
647{
648 struct atmel_lcdfb_info *sinfo = info->par;
649 unsigned int val;
650 u32 *pal;
651 int ret = 1;
652
653 if (info->var.grayscale)
654 red = green = blue = (19595 * red + 38470 * green
655 + 7471 * blue) >> 16;
656
657 switch (info->fix.visual) {
658 case FB_VISUAL_TRUECOLOR:
659 if (regno < 16) {
660 pal = info->pseudo_palette;
661
662 val = chan_to_field(red, &info->var.red);
663 val |= chan_to_field(green, &info->var.green);
664 val |= chan_to_field(blue, &info->var.blue);
665
666 pal[regno] = val;
667 ret = 0;
668 }
669 break;
670
671 case FB_VISUAL_PSEUDOCOLOR:
672 if (regno < 256) {
673 val = ((red >> 11) & 0x001f);
674 val |= ((green >> 6) & 0x03e0);
675 val |= ((blue >> 1) & 0x7c00);
676
677 /*
678 * TODO: intensity bit. Maybe something like
679 * ~(red[10] ^ green[10] ^ blue[10]) & 1
680 */
681
682 lcdc_writel(sinfo, ATMEL_LCDC_LUT(regno), val);
683 ret = 0;
684 }
685 break;
Nicolas Ferre250a2692007-07-21 04:37:59 -0700686
687 case FB_VISUAL_MONO01:
688 if (regno < 2) {
689 val = (regno == 0) ? 0x00 : 0x1F;
690 lcdc_writel(sinfo, ATMEL_LCDC_LUT(regno), val);
691 ret = 0;
692 }
693 break;
694
Nicolas Ferre14340582007-05-10 22:23:26 -0700695 }
696
697 return ret;
698}
699
700static int atmel_lcdfb_pan_display(struct fb_var_screeninfo *var,
701 struct fb_info *info)
702{
703 dev_dbg(info->device, "%s\n", __func__);
704
705 atmel_lcdfb_update_dma(info, var);
706
707 return 0;
708}
709
710static struct fb_ops atmel_lcdfb_ops = {
711 .owner = THIS_MODULE,
712 .fb_check_var = atmel_lcdfb_check_var,
713 .fb_set_par = atmel_lcdfb_set_par,
714 .fb_setcolreg = atmel_lcdfb_setcolreg,
715 .fb_pan_display = atmel_lcdfb_pan_display,
716 .fb_fillrect = cfb_fillrect,
717 .fb_copyarea = cfb_copyarea,
718 .fb_imageblit = cfb_imageblit,
719};
720
721static irqreturn_t atmel_lcdfb_interrupt(int irq, void *dev_id)
722{
723 struct fb_info *info = dev_id;
724 struct atmel_lcdfb_info *sinfo = info->par;
725 u32 status;
726
727 status = lcdc_readl(sinfo, ATMEL_LCDC_ISR);
Nicolas Ferred22579b2008-07-23 21:31:20 -0700728 if (status & ATMEL_LCDC_UFLWI) {
729 dev_warn(info->device, "FIFO underflow %#x\n", status);
730 /* reset DMA and FIFO to avoid screen shifting */
731 schedule_work(&sinfo->task);
732 }
733 lcdc_writel(sinfo, ATMEL_LCDC_ICR, status);
Nicolas Ferre14340582007-05-10 22:23:26 -0700734 return IRQ_HANDLED;
735}
736
Nicolas Ferred22579b2008-07-23 21:31:20 -0700737/*
738 * LCD controller task (to reset the LCD)
739 */
740static void atmel_lcdfb_task(struct work_struct *work)
741{
742 struct atmel_lcdfb_info *sinfo =
743 container_of(work, struct atmel_lcdfb_info, task);
744
745 atmel_lcdfb_reset(sinfo);
746}
747
Nicolas Ferre14340582007-05-10 22:23:26 -0700748static int __init atmel_lcdfb_init_fbinfo(struct atmel_lcdfb_info *sinfo)
749{
750 struct fb_info *info = sinfo->info;
751 int ret = 0;
752
Nicolas Ferre14340582007-05-10 22:23:26 -0700753 info->var.activate |= FB_ACTIVATE_FORCE | FB_ACTIVATE_NOW;
754
755 dev_info(info->device,
756 "%luKiB frame buffer at %08lx (mapped at %p)\n",
757 (unsigned long)info->fix.smem_len / 1024,
758 (unsigned long)info->fix.smem_start,
759 info->screen_base);
760
761 /* Allocate colormap */
762 ret = fb_alloc_cmap(&info->cmap, 256, 0);
763 if (ret < 0)
764 dev_err(info->device, "Alloc color map failed\n");
765
766 return ret;
767}
768
769static void atmel_lcdfb_start_clock(struct atmel_lcdfb_info *sinfo)
770{
771 if (sinfo->bus_clk)
772 clk_enable(sinfo->bus_clk);
773 clk_enable(sinfo->lcdc_clk);
774}
775
776static void atmel_lcdfb_stop_clock(struct atmel_lcdfb_info *sinfo)
777{
778 if (sinfo->bus_clk)
779 clk_disable(sinfo->bus_clk);
780 clk_disable(sinfo->lcdc_clk);
781}
782
783
784static int __init atmel_lcdfb_probe(struct platform_device *pdev)
785{
786 struct device *dev = &pdev->dev;
787 struct fb_info *info;
788 struct atmel_lcdfb_info *sinfo;
789 struct atmel_lcdfb_info *pdata_sinfo;
Nicolas Ferre968910b2008-07-23 21:31:34 -0700790 struct fb_videomode fbmode;
Nicolas Ferre14340582007-05-10 22:23:26 -0700791 struct resource *regs = NULL;
792 struct resource *map = NULL;
793 int ret;
794
795 dev_dbg(dev, "%s BEGIN\n", __func__);
796
797 ret = -ENOMEM;
798 info = framebuffer_alloc(sizeof(struct atmel_lcdfb_info), dev);
799 if (!info) {
800 dev_err(dev, "cannot allocate memory\n");
801 goto out;
802 }
803
804 sinfo = info->par;
805
806 if (dev->platform_data) {
807 pdata_sinfo = (struct atmel_lcdfb_info *)dev->platform_data;
808 sinfo->default_bpp = pdata_sinfo->default_bpp;
809 sinfo->default_dmacon = pdata_sinfo->default_dmacon;
810 sinfo->default_lcdcon2 = pdata_sinfo->default_lcdcon2;
811 sinfo->default_monspecs = pdata_sinfo->default_monspecs;
812 sinfo->atmel_lcdfb_power_control = pdata_sinfo->atmel_lcdfb_power_control;
813 sinfo->guard_time = pdata_sinfo->guard_time;
Haavard Skinnemoenea757ac2008-08-12 15:08:57 -0700814 sinfo->smem_len = pdata_sinfo->smem_len;
David Brownella9a84c32008-02-06 01:39:26 -0800815 sinfo->lcdcon_is_backlight = pdata_sinfo->lcdcon_is_backlight;
Nicolas Ferrefd085802008-04-28 02:15:21 -0700816 sinfo->lcd_wiring_mode = pdata_sinfo->lcd_wiring_mode;
Nicolas Ferre14340582007-05-10 22:23:26 -0700817 } else {
818 dev_err(dev, "cannot get default configuration\n");
819 goto free_info;
820 }
821 sinfo->info = info;
822 sinfo->pdev = pdev;
823
824 strcpy(info->fix.id, sinfo->pdev->name);
825 info->flags = ATMEL_LCDFB_FBINFO_DEFAULT;
826 info->pseudo_palette = sinfo->pseudo_palette;
827 info->fbops = &atmel_lcdfb_ops;
828
829 memcpy(&info->monspecs, sinfo->default_monspecs, sizeof(info->monspecs));
830 info->fix = atmel_lcdfb_fix;
831
832 /* Enable LCDC Clocks */
Nicolas Ferre915190f2009-07-21 11:31:29 +0100833 if (cpu_is_at91sam9261() || cpu_is_at91sam9g10()
834 || cpu_is_at32ap7000()) {
Nicolas Ferre14340582007-05-10 22:23:26 -0700835 sinfo->bus_clk = clk_get(dev, "hck1");
836 if (IS_ERR(sinfo->bus_clk)) {
837 ret = PTR_ERR(sinfo->bus_clk);
838 goto free_info;
839 }
840 }
841 sinfo->lcdc_clk = clk_get(dev, "lcdc_clk");
842 if (IS_ERR(sinfo->lcdc_clk)) {
843 ret = PTR_ERR(sinfo->lcdc_clk);
844 goto put_bus_clk;
845 }
846 atmel_lcdfb_start_clock(sinfo);
847
848 ret = fb_find_mode(&info->var, info, NULL, info->monspecs.modedb,
849 info->monspecs.modedb_len, info->monspecs.modedb,
850 sinfo->default_bpp);
851 if (!ret) {
852 dev_err(dev, "no suitable video mode found\n");
853 goto stop_clk;
854 }
855
856
857 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
858 if (!regs) {
859 dev_err(dev, "resources unusable\n");
860 ret = -ENXIO;
861 goto stop_clk;
862 }
863
864 sinfo->irq_base = platform_get_irq(pdev, 0);
865 if (sinfo->irq_base < 0) {
866 dev_err(dev, "unable to get irq\n");
867 ret = sinfo->irq_base;
868 goto stop_clk;
869 }
870
871 /* Initialize video memory */
872 map = platform_get_resource(pdev, IORESOURCE_MEM, 1);
873 if (map) {
874 /* use a pre-allocated memory buffer */
875 info->fix.smem_start = map->start;
876 info->fix.smem_len = map->end - map->start + 1;
877 if (!request_mem_region(info->fix.smem_start,
878 info->fix.smem_len, pdev->name)) {
879 ret = -EBUSY;
880 goto stop_clk;
881 }
882
883 info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
884 if (!info->screen_base)
885 goto release_intmem;
Haavard Skinnemoen01d3a5e2008-04-28 02:15:19 -0700886
887 /*
888 * Don't clear the framebuffer -- someone may have set
889 * up a splash image.
890 */
Nicolas Ferre14340582007-05-10 22:23:26 -0700891 } else {
892 /* alocate memory buffer */
893 ret = atmel_lcdfb_alloc_video_memory(sinfo);
894 if (ret < 0) {
895 dev_err(dev, "cannot allocate framebuffer: %d\n", ret);
896 goto stop_clk;
897 }
898 }
899
900 /* LCDC registers */
901 info->fix.mmio_start = regs->start;
902 info->fix.mmio_len = regs->end - regs->start + 1;
903
904 if (!request_mem_region(info->fix.mmio_start,
905 info->fix.mmio_len, pdev->name)) {
906 ret = -EBUSY;
907 goto free_fb;
908 }
909
910 sinfo->mmio = ioremap(info->fix.mmio_start, info->fix.mmio_len);
911 if (!sinfo->mmio) {
912 dev_err(dev, "cannot map LCDC registers\n");
913 goto release_mem;
914 }
915
David Brownella9a84c32008-02-06 01:39:26 -0800916 /* Initialize PWM for contrast or backlight ("off") */
917 init_contrast(sinfo);
918
Nicolas Ferre14340582007-05-10 22:23:26 -0700919 /* interrupt */
920 ret = request_irq(sinfo->irq_base, atmel_lcdfb_interrupt, 0, pdev->name, info);
921 if (ret) {
922 dev_err(dev, "request_irq failed: %d\n", ret);
923 goto unmap_mmio;
924 }
925
Nicolas Ferred22579b2008-07-23 21:31:20 -0700926 /* Some operations on the LCDC might sleep and
927 * require a preemptible task context */
928 INIT_WORK(&sinfo->task, atmel_lcdfb_task);
929
Nicolas Ferre14340582007-05-10 22:23:26 -0700930 ret = atmel_lcdfb_init_fbinfo(sinfo);
931 if (ret < 0) {
932 dev_err(dev, "init fbinfo failed: %d\n", ret);
933 goto unregister_irqs;
934 }
935
936 /*
937 * This makes sure that our colour bitfield
938 * descriptors are correctly initialised.
939 */
940 atmel_lcdfb_check_var(&info->var, info);
941
942 ret = fb_set_var(info, &info->var);
943 if (ret) {
944 dev_warn(dev, "unable to set display parameters\n");
945 goto free_cmap;
946 }
947
948 dev_set_drvdata(dev, info);
949
950 /*
951 * Tell the world that we're ready to go
952 */
953 ret = register_framebuffer(info);
954 if (ret < 0) {
955 dev_err(dev, "failed to register framebuffer device: %d\n", ret);
Stanislaw Gruszka34a35bd2008-09-05 14:00:22 -0700956 goto reset_drvdata;
Nicolas Ferre14340582007-05-10 22:23:26 -0700957 }
958
Nicolas Ferre968910b2008-07-23 21:31:34 -0700959 /* add selected videomode to modelist */
960 fb_var_to_videomode(&fbmode, &info->var);
961 fb_add_videomode(&fbmode, &info->modelist);
962
Nicolas Ferre14340582007-05-10 22:23:26 -0700963 /* Power up the LCDC screen */
964 if (sinfo->atmel_lcdfb_power_control)
965 sinfo->atmel_lcdfb_power_control(1);
966
Claudio Scordino93f6ced2009-10-09 12:20:21 +0200967 dev_info(dev, "fb%d: Atmel LCDC at 0x%08lx (mapped at %p), irq %d\n",
Nicolas Ferre14340582007-05-10 22:23:26 -0700968 info->node, info->fix.mmio_start, sinfo->mmio, sinfo->irq_base);
969
970 return 0;
971
Stanislaw Gruszka34a35bd2008-09-05 14:00:22 -0700972reset_drvdata:
973 dev_set_drvdata(dev, NULL);
Nicolas Ferre14340582007-05-10 22:23:26 -0700974free_cmap:
975 fb_dealloc_cmap(&info->cmap);
976unregister_irqs:
Nicolas Ferred22579b2008-07-23 21:31:20 -0700977 cancel_work_sync(&sinfo->task);
Nicolas Ferre14340582007-05-10 22:23:26 -0700978 free_irq(sinfo->irq_base, info);
979unmap_mmio:
David Brownella9a84c32008-02-06 01:39:26 -0800980 exit_backlight(sinfo);
Nicolas Ferre14340582007-05-10 22:23:26 -0700981 iounmap(sinfo->mmio);
982release_mem:
983 release_mem_region(info->fix.mmio_start, info->fix.mmio_len);
984free_fb:
985 if (map)
986 iounmap(info->screen_base);
987 else
988 atmel_lcdfb_free_video_memory(sinfo);
989
990release_intmem:
991 if (map)
992 release_mem_region(info->fix.smem_start, info->fix.smem_len);
993stop_clk:
994 atmel_lcdfb_stop_clock(sinfo);
995 clk_put(sinfo->lcdc_clk);
996put_bus_clk:
997 if (sinfo->bus_clk)
998 clk_put(sinfo->bus_clk);
999free_info:
1000 framebuffer_release(info);
1001out:
1002 dev_dbg(dev, "%s FAILED\n", __func__);
1003 return ret;
1004}
1005
1006static int __exit atmel_lcdfb_remove(struct platform_device *pdev)
1007{
1008 struct device *dev = &pdev->dev;
1009 struct fb_info *info = dev_get_drvdata(dev);
Stanislaw Gruszka34a35bd2008-09-05 14:00:22 -07001010 struct atmel_lcdfb_info *sinfo;
Nicolas Ferre14340582007-05-10 22:23:26 -07001011
Stanislaw Gruszka34a35bd2008-09-05 14:00:22 -07001012 if (!info || !info->par)
Nicolas Ferre14340582007-05-10 22:23:26 -07001013 return 0;
Stanislaw Gruszka34a35bd2008-09-05 14:00:22 -07001014 sinfo = info->par;
Nicolas Ferre14340582007-05-10 22:23:26 -07001015
Nicolas Ferred22579b2008-07-23 21:31:20 -07001016 cancel_work_sync(&sinfo->task);
David Brownella9a84c32008-02-06 01:39:26 -08001017 exit_backlight(sinfo);
Nicolas Ferre14340582007-05-10 22:23:26 -07001018 if (sinfo->atmel_lcdfb_power_control)
1019 sinfo->atmel_lcdfb_power_control(0);
1020 unregister_framebuffer(info);
1021 atmel_lcdfb_stop_clock(sinfo);
1022 clk_put(sinfo->lcdc_clk);
1023 if (sinfo->bus_clk)
1024 clk_put(sinfo->bus_clk);
1025 fb_dealloc_cmap(&info->cmap);
1026 free_irq(sinfo->irq_base, info);
1027 iounmap(sinfo->mmio);
1028 release_mem_region(info->fix.mmio_start, info->fix.mmio_len);
1029 if (platform_get_resource(pdev, IORESOURCE_MEM, 1)) {
1030 iounmap(info->screen_base);
1031 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1032 } else {
1033 atmel_lcdfb_free_video_memory(sinfo);
1034 }
1035
1036 dev_set_drvdata(dev, NULL);
1037 framebuffer_release(info);
1038
1039 return 0;
1040}
1041
David Brownellcf19a372008-04-28 02:15:20 -07001042#ifdef CONFIG_PM
1043
1044static int atmel_lcdfb_suspend(struct platform_device *pdev, pm_message_t mesg)
1045{
1046 struct fb_info *info = platform_get_drvdata(pdev);
1047 struct atmel_lcdfb_info *sinfo = info->par;
1048
Haavard Skinnemoen3aa04f12008-09-13 02:33:23 -07001049 /*
1050 * We don't want to handle interrupts while the clock is
1051 * stopped. It may take forever.
1052 */
1053 lcdc_writel(sinfo, ATMEL_LCDC_IDR, ~0UL);
1054
David Brownellcf19a372008-04-28 02:15:20 -07001055 sinfo->saved_lcdcon = lcdc_readl(sinfo, ATMEL_LCDC_CONTRAST_VAL);
1056 lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, 0);
1057 if (sinfo->atmel_lcdfb_power_control)
1058 sinfo->atmel_lcdfb_power_control(0);
Haavard Skinnemoen3aa04f12008-09-13 02:33:23 -07001059
1060 atmel_lcdfb_stop(sinfo);
David Brownellcf19a372008-04-28 02:15:20 -07001061 atmel_lcdfb_stop_clock(sinfo);
Haavard Skinnemoen3aa04f12008-09-13 02:33:23 -07001062
David Brownellcf19a372008-04-28 02:15:20 -07001063 return 0;
1064}
1065
1066static int atmel_lcdfb_resume(struct platform_device *pdev)
1067{
1068 struct fb_info *info = platform_get_drvdata(pdev);
1069 struct atmel_lcdfb_info *sinfo = info->par;
1070
1071 atmel_lcdfb_start_clock(sinfo);
Haavard Skinnemoen3aa04f12008-09-13 02:33:23 -07001072 atmel_lcdfb_start(sinfo);
David Brownellcf19a372008-04-28 02:15:20 -07001073 if (sinfo->atmel_lcdfb_power_control)
1074 sinfo->atmel_lcdfb_power_control(1);
1075 lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, sinfo->saved_lcdcon);
Haavard Skinnemoen3aa04f12008-09-13 02:33:23 -07001076
1077 /* Enable FIFO & DMA errors */
1078 lcdc_writel(sinfo, ATMEL_LCDC_IER, ATMEL_LCDC_UFLWI
1079 | ATMEL_LCDC_OWRI | ATMEL_LCDC_MERI);
1080
David Brownellcf19a372008-04-28 02:15:20 -07001081 return 0;
1082}
1083
1084#else
1085#define atmel_lcdfb_suspend NULL
1086#define atmel_lcdfb_resume NULL
1087#endif
1088
Nicolas Ferre14340582007-05-10 22:23:26 -07001089static struct platform_driver atmel_lcdfb_driver = {
1090 .remove = __exit_p(atmel_lcdfb_remove),
David Brownellcf19a372008-04-28 02:15:20 -07001091 .suspend = atmel_lcdfb_suspend,
1092 .resume = atmel_lcdfb_resume,
David Brownella9a84c32008-02-06 01:39:26 -08001093
Nicolas Ferre14340582007-05-10 22:23:26 -07001094 .driver = {
1095 .name = "atmel_lcdfb",
1096 .owner = THIS_MODULE,
1097 },
1098};
1099
1100static int __init atmel_lcdfb_init(void)
1101{
1102 return platform_driver_probe(&atmel_lcdfb_driver, atmel_lcdfb_probe);
1103}
1104
1105static void __exit atmel_lcdfb_exit(void)
1106{
1107 platform_driver_unregister(&atmel_lcdfb_driver);
1108}
1109
1110module_init(atmel_lcdfb_init);
1111module_exit(atmel_lcdfb_exit);
1112
1113MODULE_DESCRIPTION("AT91/AT32 LCD Controller framebuffer driver");
Nicolas Ferre8f4c79c2008-01-14 00:55:13 -08001114MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>");
Nicolas Ferre14340582007-05-10 22:23:26 -07001115MODULE_LICENSE("GPL");