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14340586 NF |
1 | /* |
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> | |
a9a84c37 | 19 | #include <linux/backlight.h> |
14340586 | 20 | |
a09e64fb RK |
21 | #include <mach/board.h> |
22 | #include <mach/cpu.h> | |
23 | #include <mach/gpio.h> | |
14340586 NF |
24 | |
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 | |
53b7479b NF |
32 | #define ATMEL_LCDC_DMA_BURST_LEN 8 /* words */ |
33 | #define ATMEL_LCDC_FIFO_SIZE 512 /* words */ | |
14340586 NF |
34 | |
35 | #if defined(CONFIG_ARCH_AT91) | |
e730d8b0 HS |
36 | #define ATMEL_LCDFB_FBINFO_DEFAULT (FBINFO_DEFAULT \ |
37 | | FBINFO_PARTIAL_PAN_OK \ | |
38 | | FBINFO_HWACCEL_YPAN) | |
14340586 NF |
39 | |
40 | static 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 | ||
51 | static 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 | ||
a9a84c37 DB |
70 | static 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 */ | |
77 | static 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 | ||
106 | static 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 | ||
113 | static struct backlight_ops atmel_lcdc_bl_ops = { | |
114 | .update_status = atmel_bl_update_status, | |
115 | .get_brightness = atmel_bl_get_brightness, | |
116 | }; | |
117 | ||
118 | static 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); | |
cf7b9a1e | 129 | if (IS_ERR(bl)) { |
a9a84c37 DB |
130 | 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 | ||
142 | static void exit_backlight(struct atmel_lcdfb_info *sinfo) | |
143 | { | |
144 | if (sinfo->backlight) | |
145 | backlight_device_unregister(sinfo->backlight); | |
146 | } | |
147 | ||
148 | #else | |
149 | ||
150 | static void init_backlight(struct atmel_lcdfb_info *sinfo) | |
151 | { | |
152 | dev_warn(&sinfo->pdev->dev, "backlight control is not available\n"); | |
153 | } | |
154 | ||
155 | static void exit_backlight(struct atmel_lcdfb_info *sinfo) | |
156 | { | |
157 | } | |
158 | ||
159 | #endif | |
160 | ||
161 | static 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 | ||
14340586 NF |
171 | |
172 | static struct fb_fix_screeninfo atmel_lcdfb_fix __initdata = { | |
173 | .type = FB_TYPE_PACKED_PIXELS, | |
174 | .visual = FB_VISUAL_TRUECOLOR, | |
175 | .xpanstep = 0, | |
e730d8b0 | 176 | .ypanstep = 1, |
14340586 NF |
177 | .ywrapstep = 0, |
178 | .accel = FB_ACCEL_NONE, | |
179 | }; | |
180 | ||
250a269d NF |
181 | static unsigned long compute_hozval(unsigned long xres, unsigned long lcdcon2) |
182 | { | |
183 | unsigned long value; | |
184 | ||
915190f7 NF |
185 | if (!(cpu_is_at91sam9261() || cpu_is_at91sam9g10() |
186 | || cpu_is_at32ap7000())) | |
250a269d NF |
187 | 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 | } | |
14340586 | 205 | |
3aa04f1b HS |
206 | static 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 | ||
219 | static 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 | ||
228 | static 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 | ||
14340586 NF |
236 | static 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 | ||
254 | static 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 | |
1d01e835 KH |
265 | * |
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. | |
14340586 NF |
268 | */ |
269 | static 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; | |
ea757aca | 273 | unsigned int smem_len; |
14340586 | 274 | |
ea757aca HS |
275 | 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); | |
14340586 NF |
278 | |
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 | ||
01d3a5e7 HS |
286 | memset(info->screen_base, 0, info->fix.smem_len); |
287 | ||
14340586 NF |
288 | return 0; |
289 | } | |
290 | ||
968910bd NF |
291 | static 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 | ||
14340586 NF |
305 | /** |
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 | */ | |
328 | static 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__); | |
968910bd NF |
338 | |
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 | ||
14340586 NF |
347 | 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 | ||
97b9a5a2 | 352 | if (PICOS2KHZ(var->pixclock) > clk_value_khz) { |
14340586 NF |
353 | dev_err(dev, "%lu KHz pixel clock is too fast\n", PICOS2KHZ(var->pixclock)); |
354 | return -EINVAL; | |
355 | } | |
356 | ||
968910bd NF |
357 | /* 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 | ||
14340586 NF |
364 | /* 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 | ||
f928ac0a SG |
373 | 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 | ||
162b3a08 HS |
380 | /* 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 | ||
14340586 | 400 | switch (var->bits_per_pixel) { |
250a269d | 401 | case 1: |
14340586 NF |
402 | 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: | |
fd085801 NF |
411 | 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; | |
fbd03a1c GG |
416 | } 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; | |
fd085801 NF |
420 | } else { |
421 | /* BGR:555 mode */ | |
422 | var->red.offset = 0; | |
423 | var->blue.offset = 10; | |
424 | var->green.length = 5; | |
425 | } | |
14340586 | 426 | var->green.offset = 5; |
fd085801 | 427 | var->red.length = var->blue.length = 5; |
14340586 | 428 | break; |
14340586 | 429 | case 32: |
4440e0e1 HS |
430 | var->transp.offset = 24; |
431 | var->transp.length = 8; | |
432 | /* fall through */ | |
433 | case 24: | |
fd085801 NF |
434 | 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 | } | |
14340586 | 443 | var->green.offset = 8; |
14340586 NF |
444 | 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 | ||
d22579b8 NF |
455 | /* |
456 | * LCD reset sequence | |
457 | */ | |
458 | static void atmel_lcdfb_reset(struct atmel_lcdfb_info *sinfo) | |
459 | { | |
460 | might_sleep(); | |
461 | ||
3aa04f1b HS |
462 | atmel_lcdfb_stop(sinfo); |
463 | atmel_lcdfb_start(sinfo); | |
d22579b8 NF |
464 | } |
465 | ||
14340586 NF |
466 | /** |
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 | */ | |
480 | static int atmel_lcdfb_set_par(struct fb_info *info) | |
481 | { | |
482 | struct atmel_lcdfb_info *sinfo = info->par; | |
250a269d | 483 | unsigned long hozval_linesz; |
14340586 NF |
484 | unsigned long value; |
485 | unsigned long clk_value_khz; | |
250a269d | 486 | unsigned long bits_per_line; |
14340586 | 487 | |
d22579b8 NF |
488 | might_sleep(); |
489 | ||
14340586 NF |
490 | dev_dbg(info->device, "%s:\n", __func__); |
491 | dev_dbg(info->device, " * resolution: %ux%u (%ux%u virtual)\n", | |
492 | info->var.xres, info->var.yres, | |
493 | info->var.xres_virtual, info->var.yres_virtual); | |
494 | ||
3aa04f1b | 495 | atmel_lcdfb_stop_nowait(sinfo); |
14340586 | 496 | |
250a269d NF |
497 | if (info->var.bits_per_pixel == 1) |
498 | info->fix.visual = FB_VISUAL_MONO01; | |
499 | else if (info->var.bits_per_pixel <= 8) | |
14340586 NF |
500 | info->fix.visual = FB_VISUAL_PSEUDOCOLOR; |
501 | else | |
502 | info->fix.visual = FB_VISUAL_TRUECOLOR; | |
503 | ||
250a269d NF |
504 | bits_per_line = info->var.xres_virtual * info->var.bits_per_pixel; |
505 | info->fix.line_length = DIV_ROUND_UP(bits_per_line, 8); | |
14340586 NF |
506 | |
507 | /* Re-initialize the DMA engine... */ | |
508 | dev_dbg(info->device, " * update DMA engine\n"); | |
509 | atmel_lcdfb_update_dma(info, &info->var); | |
510 | ||
511 | /* ...set frame size and burst length = 8 words (?) */ | |
512 | value = (info->var.yres * info->var.xres * info->var.bits_per_pixel) / 32; | |
513 | value |= ((ATMEL_LCDC_DMA_BURST_LEN - 1) << ATMEL_LCDC_BLENGTH_OFFSET); | |
514 | lcdc_writel(sinfo, ATMEL_LCDC_DMAFRMCFG, value); | |
515 | ||
516 | /* Now, the LCDC core... */ | |
517 | ||
518 | /* Set pixel clock */ | |
519 | clk_value_khz = clk_get_rate(sinfo->lcdc_clk) / 1000; | |
520 | ||
250a269d | 521 | value = DIV_ROUND_UP(clk_value_khz, PICOS2KHZ(info->var.pixclock)); |
14340586 | 522 | |
baf6332a | 523 | if (value < 2) { |
14340586 NF |
524 | dev_notice(info->device, "Bypassing pixel clock divider\n"); |
525 | lcdc_writel(sinfo, ATMEL_LCDC_LCDCON1, ATMEL_LCDC_BYPASS); | |
250a269d | 526 | } else { |
baf6332a NF |
527 | value = (value / 2) - 1; |
528 | dev_dbg(info->device, " * programming CLKVAL = 0x%08lx\n", | |
529 | value); | |
530 | lcdc_writel(sinfo, ATMEL_LCDC_LCDCON1, | |
531 | value << ATMEL_LCDC_CLKVAL_OFFSET); | |
250a269d NF |
532 | info->var.pixclock = KHZ2PICOS(clk_value_khz / (2 * (value + 1))); |
533 | dev_dbg(info->device, " updated pixclk: %lu KHz\n", | |
534 | PICOS2KHZ(info->var.pixclock)); | |
535 | } | |
536 | ||
14340586 NF |
537 | |
538 | /* Initialize control register 2 */ | |
539 | value = sinfo->default_lcdcon2; | |
540 | ||
541 | if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT)) | |
542 | value |= ATMEL_LCDC_INVLINE_INVERTED; | |
543 | if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT)) | |
544 | value |= ATMEL_LCDC_INVFRAME_INVERTED; | |
545 | ||
546 | switch (info->var.bits_per_pixel) { | |
547 | case 1: value |= ATMEL_LCDC_PIXELSIZE_1; break; | |
548 | case 2: value |= ATMEL_LCDC_PIXELSIZE_2; break; | |
549 | case 4: value |= ATMEL_LCDC_PIXELSIZE_4; break; | |
550 | case 8: value |= ATMEL_LCDC_PIXELSIZE_8; break; | |
551 | case 15: /* fall through */ | |
552 | case 16: value |= ATMEL_LCDC_PIXELSIZE_16; break; | |
553 | case 24: value |= ATMEL_LCDC_PIXELSIZE_24; break; | |
554 | case 32: value |= ATMEL_LCDC_PIXELSIZE_32; break; | |
555 | default: BUG(); break; | |
556 | } | |
557 | dev_dbg(info->device, " * LCDCON2 = %08lx\n", value); | |
558 | lcdc_writel(sinfo, ATMEL_LCDC_LCDCON2, value); | |
559 | ||
560 | /* Vertical timing */ | |
561 | value = (info->var.vsync_len - 1) << ATMEL_LCDC_VPW_OFFSET; | |
562 | value |= info->var.upper_margin << ATMEL_LCDC_VBP_OFFSET; | |
563 | value |= info->var.lower_margin; | |
564 | dev_dbg(info->device, " * LCDTIM1 = %08lx\n", value); | |
565 | lcdc_writel(sinfo, ATMEL_LCDC_TIM1, value); | |
566 | ||
567 | /* Horizontal timing */ | |
568 | value = (info->var.right_margin - 1) << ATMEL_LCDC_HFP_OFFSET; | |
569 | value |= (info->var.hsync_len - 1) << ATMEL_LCDC_HPW_OFFSET; | |
570 | value |= (info->var.left_margin - 1); | |
571 | dev_dbg(info->device, " * LCDTIM2 = %08lx\n", value); | |
572 | lcdc_writel(sinfo, ATMEL_LCDC_TIM2, value); | |
573 | ||
250a269d NF |
574 | /* Horizontal value (aka line size) */ |
575 | hozval_linesz = compute_hozval(info->var.xres, | |
576 | lcdc_readl(sinfo, ATMEL_LCDC_LCDCON2)); | |
577 | ||
14340586 | 578 | /* Display size */ |
250a269d | 579 | value = (hozval_linesz - 1) << ATMEL_LCDC_HOZVAL_OFFSET; |
14340586 | 580 | value |= info->var.yres - 1; |
250a269d | 581 | dev_dbg(info->device, " * LCDFRMCFG = %08lx\n", value); |
14340586 NF |
582 | lcdc_writel(sinfo, ATMEL_LCDC_LCDFRMCFG, value); |
583 | ||
584 | /* FIFO Threshold: Use formula from data sheet */ | |
585 | value = ATMEL_LCDC_FIFO_SIZE - (2 * ATMEL_LCDC_DMA_BURST_LEN + 3); | |
586 | lcdc_writel(sinfo, ATMEL_LCDC_FIFO, value); | |
587 | ||
588 | /* Toggle LCD_MODE every frame */ | |
589 | lcdc_writel(sinfo, ATMEL_LCDC_MVAL, 0); | |
590 | ||
591 | /* Disable all interrupts */ | |
592 | lcdc_writel(sinfo, ATMEL_LCDC_IDR, ~0UL); | |
d22579b8 NF |
593 | /* Enable FIFO & DMA errors */ |
594 | lcdc_writel(sinfo, ATMEL_LCDC_IER, ATMEL_LCDC_UFLWI | ATMEL_LCDC_OWRI | ATMEL_LCDC_MERI); | |
14340586 | 595 | |
14340586 NF |
596 | /* ...wait for DMA engine to become idle... */ |
597 | while (lcdc_readl(sinfo, ATMEL_LCDC_DMACON) & ATMEL_LCDC_DMABUSY) | |
598 | msleep(10); | |
599 | ||
3aa04f1b | 600 | atmel_lcdfb_start(sinfo); |
14340586 NF |
601 | |
602 | dev_dbg(info->device, " * DONE\n"); | |
603 | ||
604 | return 0; | |
605 | } | |
606 | ||
607 | static inline unsigned int chan_to_field(unsigned int chan, const struct fb_bitfield *bf) | |
608 | { | |
609 | chan &= 0xffff; | |
610 | chan >>= 16 - bf->length; | |
611 | return chan << bf->offset; | |
612 | } | |
613 | ||
614 | /** | |
615 | * atmel_lcdfb_setcolreg - Optional function. Sets a color register. | |
616 | * @regno: Which register in the CLUT we are programming | |
617 | * @red: The red value which can be up to 16 bits wide | |
618 | * @green: The green value which can be up to 16 bits wide | |
619 | * @blue: The blue value which can be up to 16 bits wide. | |
620 | * @transp: If supported the alpha value which can be up to 16 bits wide. | |
621 | * @info: frame buffer info structure | |
622 | * | |
623 | * Set a single color register. The values supplied have a 16 bit | |
624 | * magnitude which needs to be scaled in this function for the hardware. | |
625 | * Things to take into consideration are how many color registers, if | |
626 | * any, are supported with the current color visual. With truecolor mode | |
627 | * no color palettes are supported. Here a psuedo palette is created | |
628 | * which we store the value in pseudo_palette in struct fb_info. For | |
629 | * pseudocolor mode we have a limited color palette. To deal with this | |
630 | * we can program what color is displayed for a particular pixel value. | |
631 | * DirectColor is similar in that we can program each color field. If | |
632 | * we have a static colormap we don't need to implement this function. | |
633 | * | |
634 | * Returns negative errno on error, or zero on success. In an | |
635 | * ideal world, this would have been the case, but as it turns | |
636 | * out, the other drivers return 1 on failure, so that's what | |
637 | * we're going to do. | |
638 | */ | |
639 | static int atmel_lcdfb_setcolreg(unsigned int regno, unsigned int red, | |
640 | unsigned int green, unsigned int blue, | |
641 | unsigned int transp, struct fb_info *info) | |
642 | { | |
643 | struct atmel_lcdfb_info *sinfo = info->par; | |
644 | unsigned int val; | |
645 | u32 *pal; | |
646 | int ret = 1; | |
647 | ||
648 | if (info->var.grayscale) | |
649 | red = green = blue = (19595 * red + 38470 * green | |
650 | + 7471 * blue) >> 16; | |
651 | ||
652 | switch (info->fix.visual) { | |
653 | case FB_VISUAL_TRUECOLOR: | |
654 | if (regno < 16) { | |
655 | pal = info->pseudo_palette; | |
656 | ||
657 | val = chan_to_field(red, &info->var.red); | |
658 | val |= chan_to_field(green, &info->var.green); | |
659 | val |= chan_to_field(blue, &info->var.blue); | |
660 | ||
661 | pal[regno] = val; | |
662 | ret = 0; | |
663 | } | |
664 | break; | |
665 | ||
666 | case FB_VISUAL_PSEUDOCOLOR: | |
667 | if (regno < 256) { | |
668 | val = ((red >> 11) & 0x001f); | |
669 | val |= ((green >> 6) & 0x03e0); | |
670 | val |= ((blue >> 1) & 0x7c00); | |
671 | ||
672 | /* | |
673 | * TODO: intensity bit. Maybe something like | |
674 | * ~(red[10] ^ green[10] ^ blue[10]) & 1 | |
675 | */ | |
676 | ||
677 | lcdc_writel(sinfo, ATMEL_LCDC_LUT(regno), val); | |
678 | ret = 0; | |
679 | } | |
680 | break; | |
250a269d NF |
681 | |
682 | case FB_VISUAL_MONO01: | |
683 | if (regno < 2) { | |
684 | val = (regno == 0) ? 0x00 : 0x1F; | |
685 | lcdc_writel(sinfo, ATMEL_LCDC_LUT(regno), val); | |
686 | ret = 0; | |
687 | } | |
688 | break; | |
689 | ||
14340586 NF |
690 | } |
691 | ||
692 | return ret; | |
693 | } | |
694 | ||
695 | static int atmel_lcdfb_pan_display(struct fb_var_screeninfo *var, | |
696 | struct fb_info *info) | |
697 | { | |
698 | dev_dbg(info->device, "%s\n", __func__); | |
699 | ||
700 | atmel_lcdfb_update_dma(info, var); | |
701 | ||
702 | return 0; | |
703 | } | |
704 | ||
705 | static struct fb_ops atmel_lcdfb_ops = { | |
706 | .owner = THIS_MODULE, | |
707 | .fb_check_var = atmel_lcdfb_check_var, | |
708 | .fb_set_par = atmel_lcdfb_set_par, | |
709 | .fb_setcolreg = atmel_lcdfb_setcolreg, | |
710 | .fb_pan_display = atmel_lcdfb_pan_display, | |
711 | .fb_fillrect = cfb_fillrect, | |
712 | .fb_copyarea = cfb_copyarea, | |
713 | .fb_imageblit = cfb_imageblit, | |
714 | }; | |
715 | ||
716 | static irqreturn_t atmel_lcdfb_interrupt(int irq, void *dev_id) | |
717 | { | |
718 | struct fb_info *info = dev_id; | |
719 | struct atmel_lcdfb_info *sinfo = info->par; | |
720 | u32 status; | |
721 | ||
722 | status = lcdc_readl(sinfo, ATMEL_LCDC_ISR); | |
d22579b8 NF |
723 | if (status & ATMEL_LCDC_UFLWI) { |
724 | dev_warn(info->device, "FIFO underflow %#x\n", status); | |
725 | /* reset DMA and FIFO to avoid screen shifting */ | |
726 | schedule_work(&sinfo->task); | |
727 | } | |
728 | lcdc_writel(sinfo, ATMEL_LCDC_ICR, status); | |
14340586 NF |
729 | return IRQ_HANDLED; |
730 | } | |
731 | ||
d22579b8 NF |
732 | /* |
733 | * LCD controller task (to reset the LCD) | |
734 | */ | |
735 | static void atmel_lcdfb_task(struct work_struct *work) | |
736 | { | |
737 | struct atmel_lcdfb_info *sinfo = | |
738 | container_of(work, struct atmel_lcdfb_info, task); | |
739 | ||
740 | atmel_lcdfb_reset(sinfo); | |
741 | } | |
742 | ||
14340586 NF |
743 | static int __init atmel_lcdfb_init_fbinfo(struct atmel_lcdfb_info *sinfo) |
744 | { | |
745 | struct fb_info *info = sinfo->info; | |
746 | int ret = 0; | |
747 | ||
14340586 NF |
748 | info->var.activate |= FB_ACTIVATE_FORCE | FB_ACTIVATE_NOW; |
749 | ||
750 | dev_info(info->device, | |
751 | "%luKiB frame buffer at %08lx (mapped at %p)\n", | |
752 | (unsigned long)info->fix.smem_len / 1024, | |
753 | (unsigned long)info->fix.smem_start, | |
754 | info->screen_base); | |
755 | ||
756 | /* Allocate colormap */ | |
757 | ret = fb_alloc_cmap(&info->cmap, 256, 0); | |
758 | if (ret < 0) | |
759 | dev_err(info->device, "Alloc color map failed\n"); | |
760 | ||
761 | return ret; | |
762 | } | |
763 | ||
764 | static void atmel_lcdfb_start_clock(struct atmel_lcdfb_info *sinfo) | |
765 | { | |
766 | if (sinfo->bus_clk) | |
767 | clk_enable(sinfo->bus_clk); | |
768 | clk_enable(sinfo->lcdc_clk); | |
769 | } | |
770 | ||
771 | static void atmel_lcdfb_stop_clock(struct atmel_lcdfb_info *sinfo) | |
772 | { | |
773 | if (sinfo->bus_clk) | |
774 | clk_disable(sinfo->bus_clk); | |
775 | clk_disable(sinfo->lcdc_clk); | |
776 | } | |
777 | ||
778 | ||
779 | static int __init atmel_lcdfb_probe(struct platform_device *pdev) | |
780 | { | |
781 | struct device *dev = &pdev->dev; | |
782 | struct fb_info *info; | |
783 | struct atmel_lcdfb_info *sinfo; | |
784 | struct atmel_lcdfb_info *pdata_sinfo; | |
968910bd | 785 | struct fb_videomode fbmode; |
14340586 NF |
786 | struct resource *regs = NULL; |
787 | struct resource *map = NULL; | |
788 | int ret; | |
789 | ||
790 | dev_dbg(dev, "%s BEGIN\n", __func__); | |
791 | ||
792 | ret = -ENOMEM; | |
793 | info = framebuffer_alloc(sizeof(struct atmel_lcdfb_info), dev); | |
794 | if (!info) { | |
795 | dev_err(dev, "cannot allocate memory\n"); | |
796 | goto out; | |
797 | } | |
798 | ||
799 | sinfo = info->par; | |
800 | ||
801 | if (dev->platform_data) { | |
802 | pdata_sinfo = (struct atmel_lcdfb_info *)dev->platform_data; | |
803 | sinfo->default_bpp = pdata_sinfo->default_bpp; | |
804 | sinfo->default_dmacon = pdata_sinfo->default_dmacon; | |
805 | sinfo->default_lcdcon2 = pdata_sinfo->default_lcdcon2; | |
806 | sinfo->default_monspecs = pdata_sinfo->default_monspecs; | |
807 | sinfo->atmel_lcdfb_power_control = pdata_sinfo->atmel_lcdfb_power_control; | |
808 | sinfo->guard_time = pdata_sinfo->guard_time; | |
ea757aca | 809 | sinfo->smem_len = pdata_sinfo->smem_len; |
a9a84c37 | 810 | sinfo->lcdcon_is_backlight = pdata_sinfo->lcdcon_is_backlight; |
fd085801 | 811 | sinfo->lcd_wiring_mode = pdata_sinfo->lcd_wiring_mode; |
14340586 NF |
812 | } else { |
813 | dev_err(dev, "cannot get default configuration\n"); | |
814 | goto free_info; | |
815 | } | |
816 | sinfo->info = info; | |
817 | sinfo->pdev = pdev; | |
818 | ||
819 | strcpy(info->fix.id, sinfo->pdev->name); | |
820 | info->flags = ATMEL_LCDFB_FBINFO_DEFAULT; | |
821 | info->pseudo_palette = sinfo->pseudo_palette; | |
822 | info->fbops = &atmel_lcdfb_ops; | |
823 | ||
824 | memcpy(&info->monspecs, sinfo->default_monspecs, sizeof(info->monspecs)); | |
825 | info->fix = atmel_lcdfb_fix; | |
826 | ||
827 | /* Enable LCDC Clocks */ | |
915190f7 NF |
828 | if (cpu_is_at91sam9261() || cpu_is_at91sam9g10() |
829 | || cpu_is_at32ap7000()) { | |
14340586 NF |
830 | sinfo->bus_clk = clk_get(dev, "hck1"); |
831 | if (IS_ERR(sinfo->bus_clk)) { | |
832 | ret = PTR_ERR(sinfo->bus_clk); | |
833 | goto free_info; | |
834 | } | |
835 | } | |
836 | sinfo->lcdc_clk = clk_get(dev, "lcdc_clk"); | |
837 | if (IS_ERR(sinfo->lcdc_clk)) { | |
838 | ret = PTR_ERR(sinfo->lcdc_clk); | |
839 | goto put_bus_clk; | |
840 | } | |
841 | atmel_lcdfb_start_clock(sinfo); | |
842 | ||
843 | ret = fb_find_mode(&info->var, info, NULL, info->monspecs.modedb, | |
844 | info->monspecs.modedb_len, info->monspecs.modedb, | |
845 | sinfo->default_bpp); | |
846 | if (!ret) { | |
847 | dev_err(dev, "no suitable video mode found\n"); | |
848 | goto stop_clk; | |
849 | } | |
850 | ||
851 | ||
852 | regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
853 | if (!regs) { | |
854 | dev_err(dev, "resources unusable\n"); | |
855 | ret = -ENXIO; | |
856 | goto stop_clk; | |
857 | } | |
858 | ||
859 | sinfo->irq_base = platform_get_irq(pdev, 0); | |
860 | if (sinfo->irq_base < 0) { | |
861 | dev_err(dev, "unable to get irq\n"); | |
862 | ret = sinfo->irq_base; | |
863 | goto stop_clk; | |
864 | } | |
865 | ||
866 | /* Initialize video memory */ | |
867 | map = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
868 | if (map) { | |
869 | /* use a pre-allocated memory buffer */ | |
870 | info->fix.smem_start = map->start; | |
871 | info->fix.smem_len = map->end - map->start + 1; | |
872 | if (!request_mem_region(info->fix.smem_start, | |
873 | info->fix.smem_len, pdev->name)) { | |
874 | ret = -EBUSY; | |
875 | goto stop_clk; | |
876 | } | |
877 | ||
878 | info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len); | |
879 | if (!info->screen_base) | |
880 | goto release_intmem; | |
01d3a5e7 HS |
881 | |
882 | /* | |
883 | * Don't clear the framebuffer -- someone may have set | |
884 | * up a splash image. | |
885 | */ | |
14340586 NF |
886 | } else { |
887 | /* alocate memory buffer */ | |
888 | ret = atmel_lcdfb_alloc_video_memory(sinfo); | |
889 | if (ret < 0) { | |
890 | dev_err(dev, "cannot allocate framebuffer: %d\n", ret); | |
891 | goto stop_clk; | |
892 | } | |
893 | } | |
894 | ||
895 | /* LCDC registers */ | |
896 | info->fix.mmio_start = regs->start; | |
897 | info->fix.mmio_len = regs->end - regs->start + 1; | |
898 | ||
899 | if (!request_mem_region(info->fix.mmio_start, | |
900 | info->fix.mmio_len, pdev->name)) { | |
901 | ret = -EBUSY; | |
902 | goto free_fb; | |
903 | } | |
904 | ||
905 | sinfo->mmio = ioremap(info->fix.mmio_start, info->fix.mmio_len); | |
906 | if (!sinfo->mmio) { | |
907 | dev_err(dev, "cannot map LCDC registers\n"); | |
908 | goto release_mem; | |
909 | } | |
910 | ||
a9a84c37 DB |
911 | /* Initialize PWM for contrast or backlight ("off") */ |
912 | init_contrast(sinfo); | |
913 | ||
14340586 NF |
914 | /* interrupt */ |
915 | ret = request_irq(sinfo->irq_base, atmel_lcdfb_interrupt, 0, pdev->name, info); | |
916 | if (ret) { | |
917 | dev_err(dev, "request_irq failed: %d\n", ret); | |
918 | goto unmap_mmio; | |
919 | } | |
920 | ||
d22579b8 NF |
921 | /* Some operations on the LCDC might sleep and |
922 | * require a preemptible task context */ | |
923 | INIT_WORK(&sinfo->task, atmel_lcdfb_task); | |
924 | ||
14340586 NF |
925 | ret = atmel_lcdfb_init_fbinfo(sinfo); |
926 | if (ret < 0) { | |
927 | dev_err(dev, "init fbinfo failed: %d\n", ret); | |
928 | goto unregister_irqs; | |
929 | } | |
930 | ||
931 | /* | |
932 | * This makes sure that our colour bitfield | |
933 | * descriptors are correctly initialised. | |
934 | */ | |
935 | atmel_lcdfb_check_var(&info->var, info); | |
936 | ||
937 | ret = fb_set_var(info, &info->var); | |
938 | if (ret) { | |
939 | dev_warn(dev, "unable to set display parameters\n"); | |
940 | goto free_cmap; | |
941 | } | |
942 | ||
943 | dev_set_drvdata(dev, info); | |
944 | ||
945 | /* | |
946 | * Tell the world that we're ready to go | |
947 | */ | |
948 | ret = register_framebuffer(info); | |
949 | if (ret < 0) { | |
950 | dev_err(dev, "failed to register framebuffer device: %d\n", ret); | |
34a35bdd | 951 | goto reset_drvdata; |
14340586 NF |
952 | } |
953 | ||
968910bd NF |
954 | /* add selected videomode to modelist */ |
955 | fb_var_to_videomode(&fbmode, &info->var); | |
956 | fb_add_videomode(&fbmode, &info->modelist); | |
957 | ||
14340586 NF |
958 | /* Power up the LCDC screen */ |
959 | if (sinfo->atmel_lcdfb_power_control) | |
960 | sinfo->atmel_lcdfb_power_control(1); | |
961 | ||
962 | dev_info(dev, "fb%d: Atmel LCDC at 0x%08lx (mapped at %p), irq %lu\n", | |
963 | info->node, info->fix.mmio_start, sinfo->mmio, sinfo->irq_base); | |
964 | ||
965 | return 0; | |
966 | ||
34a35bdd SG |
967 | reset_drvdata: |
968 | dev_set_drvdata(dev, NULL); | |
14340586 NF |
969 | free_cmap: |
970 | fb_dealloc_cmap(&info->cmap); | |
971 | unregister_irqs: | |
d22579b8 | 972 | cancel_work_sync(&sinfo->task); |
14340586 NF |
973 | free_irq(sinfo->irq_base, info); |
974 | unmap_mmio: | |
a9a84c37 | 975 | exit_backlight(sinfo); |
14340586 NF |
976 | iounmap(sinfo->mmio); |
977 | release_mem: | |
978 | release_mem_region(info->fix.mmio_start, info->fix.mmio_len); | |
979 | free_fb: | |
980 | if (map) | |
981 | iounmap(info->screen_base); | |
982 | else | |
983 | atmel_lcdfb_free_video_memory(sinfo); | |
984 | ||
985 | release_intmem: | |
986 | if (map) | |
987 | release_mem_region(info->fix.smem_start, info->fix.smem_len); | |
988 | stop_clk: | |
989 | atmel_lcdfb_stop_clock(sinfo); | |
990 | clk_put(sinfo->lcdc_clk); | |
991 | put_bus_clk: | |
992 | if (sinfo->bus_clk) | |
993 | clk_put(sinfo->bus_clk); | |
994 | free_info: | |
995 | framebuffer_release(info); | |
996 | out: | |
997 | dev_dbg(dev, "%s FAILED\n", __func__); | |
998 | return ret; | |
999 | } | |
1000 | ||
1001 | static int __exit atmel_lcdfb_remove(struct platform_device *pdev) | |
1002 | { | |
1003 | struct device *dev = &pdev->dev; | |
1004 | struct fb_info *info = dev_get_drvdata(dev); | |
34a35bdd | 1005 | struct atmel_lcdfb_info *sinfo; |
14340586 | 1006 | |
34a35bdd | 1007 | if (!info || !info->par) |
14340586 | 1008 | return 0; |
34a35bdd | 1009 | sinfo = info->par; |
14340586 | 1010 | |
d22579b8 | 1011 | cancel_work_sync(&sinfo->task); |
a9a84c37 | 1012 | exit_backlight(sinfo); |
14340586 NF |
1013 | if (sinfo->atmel_lcdfb_power_control) |
1014 | sinfo->atmel_lcdfb_power_control(0); | |
1015 | unregister_framebuffer(info); | |
1016 | atmel_lcdfb_stop_clock(sinfo); | |
1017 | clk_put(sinfo->lcdc_clk); | |
1018 | if (sinfo->bus_clk) | |
1019 | clk_put(sinfo->bus_clk); | |
1020 | fb_dealloc_cmap(&info->cmap); | |
1021 | free_irq(sinfo->irq_base, info); | |
1022 | iounmap(sinfo->mmio); | |
1023 | release_mem_region(info->fix.mmio_start, info->fix.mmio_len); | |
1024 | if (platform_get_resource(pdev, IORESOURCE_MEM, 1)) { | |
1025 | iounmap(info->screen_base); | |
1026 | release_mem_region(info->fix.smem_start, info->fix.smem_len); | |
1027 | } else { | |
1028 | atmel_lcdfb_free_video_memory(sinfo); | |
1029 | } | |
1030 | ||
1031 | dev_set_drvdata(dev, NULL); | |
1032 | framebuffer_release(info); | |
1033 | ||
1034 | return 0; | |
1035 | } | |
1036 | ||
cf19a37e DB |
1037 | #ifdef CONFIG_PM |
1038 | ||
1039 | static int atmel_lcdfb_suspend(struct platform_device *pdev, pm_message_t mesg) | |
1040 | { | |
1041 | struct fb_info *info = platform_get_drvdata(pdev); | |
1042 | struct atmel_lcdfb_info *sinfo = info->par; | |
1043 | ||
3aa04f1b HS |
1044 | /* |
1045 | * We don't want to handle interrupts while the clock is | |
1046 | * stopped. It may take forever. | |
1047 | */ | |
1048 | lcdc_writel(sinfo, ATMEL_LCDC_IDR, ~0UL); | |
1049 | ||
cf19a37e DB |
1050 | sinfo->saved_lcdcon = lcdc_readl(sinfo, ATMEL_LCDC_CONTRAST_VAL); |
1051 | lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, 0); | |
1052 | if (sinfo->atmel_lcdfb_power_control) | |
1053 | sinfo->atmel_lcdfb_power_control(0); | |
3aa04f1b HS |
1054 | |
1055 | atmel_lcdfb_stop(sinfo); | |
cf19a37e | 1056 | atmel_lcdfb_stop_clock(sinfo); |
3aa04f1b | 1057 | |
cf19a37e DB |
1058 | return 0; |
1059 | } | |
1060 | ||
1061 | static int atmel_lcdfb_resume(struct platform_device *pdev) | |
1062 | { | |
1063 | struct fb_info *info = platform_get_drvdata(pdev); | |
1064 | struct atmel_lcdfb_info *sinfo = info->par; | |
1065 | ||
1066 | atmel_lcdfb_start_clock(sinfo); | |
3aa04f1b | 1067 | atmel_lcdfb_start(sinfo); |
cf19a37e DB |
1068 | if (sinfo->atmel_lcdfb_power_control) |
1069 | sinfo->atmel_lcdfb_power_control(1); | |
1070 | lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, sinfo->saved_lcdcon); | |
3aa04f1b HS |
1071 | |
1072 | /* Enable FIFO & DMA errors */ | |
1073 | lcdc_writel(sinfo, ATMEL_LCDC_IER, ATMEL_LCDC_UFLWI | |
1074 | | ATMEL_LCDC_OWRI | ATMEL_LCDC_MERI); | |
1075 | ||
cf19a37e DB |
1076 | return 0; |
1077 | } | |
1078 | ||
1079 | #else | |
1080 | #define atmel_lcdfb_suspend NULL | |
1081 | #define atmel_lcdfb_resume NULL | |
1082 | #endif | |
1083 | ||
14340586 NF |
1084 | static struct platform_driver atmel_lcdfb_driver = { |
1085 | .remove = __exit_p(atmel_lcdfb_remove), | |
cf19a37e DB |
1086 | .suspend = atmel_lcdfb_suspend, |
1087 | .resume = atmel_lcdfb_resume, | |
a9a84c37 | 1088 | |
14340586 NF |
1089 | .driver = { |
1090 | .name = "atmel_lcdfb", | |
1091 | .owner = THIS_MODULE, | |
1092 | }, | |
1093 | }; | |
1094 | ||
1095 | static int __init atmel_lcdfb_init(void) | |
1096 | { | |
1097 | return platform_driver_probe(&atmel_lcdfb_driver, atmel_lcdfb_probe); | |
1098 | } | |
1099 | ||
1100 | static void __exit atmel_lcdfb_exit(void) | |
1101 | { | |
1102 | platform_driver_unregister(&atmel_lcdfb_driver); | |
1103 | } | |
1104 | ||
1105 | module_init(atmel_lcdfb_init); | |
1106 | module_exit(atmel_lcdfb_exit); | |
1107 | ||
1108 | MODULE_DESCRIPTION("AT91/AT32 LCD Controller framebuffer driver"); | |
8f4c79ce | 1109 | MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>"); |
14340586 | 1110 | MODULE_LICENSE("GPL"); |