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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> |
5a0e3ad6 | 20 | #include <linux/gfp.h> |
355b200b | 21 | #include <linux/module.h> |
bcd2360c | 22 | #include <linux/platform_data/atmel.h> |
b985172b JCPV |
23 | #include <linux/of.h> |
24 | #include <linux/of_device.h> | |
25 | #include <linux/of_gpio.h> | |
8af2c286 | 26 | #include <video/of_display_timing.h> |
b985172b | 27 | #include <video/videomode.h> |
14340586 | 28 | |
a09e64fb | 29 | #include <mach/cpu.h> |
60e8972d | 30 | #include <asm/gpio.h> |
14340586 NF |
31 | |
32 | #include <video/atmel_lcdc.h> | |
33 | ||
8af2c286 JCPV |
34 | struct atmel_lcdfb_config { |
35 | bool have_alt_pixclock; | |
36 | bool have_hozval; | |
37 | bool have_intensity_bit; | |
38 | }; | |
39 | ||
40 | /* LCD Controller info data structure, stored in device platform_data */ | |
41 | struct atmel_lcdfb_info { | |
42 | spinlock_t lock; | |
43 | struct fb_info *info; | |
44 | void __iomem *mmio; | |
45 | int irq_base; | |
46 | struct work_struct task; | |
47 | ||
48 | unsigned int smem_len; | |
49 | struct platform_device *pdev; | |
50 | struct clk *bus_clk; | |
51 | struct clk *lcdc_clk; | |
52 | ||
53 | struct backlight_device *backlight; | |
54 | u8 bl_power; | |
55 | u8 saved_lcdcon; | |
56 | ||
57 | u32 pseudo_palette[16]; | |
58 | bool have_intensity_bit; | |
59 | ||
60 | struct atmel_lcdfb_pdata pdata; | |
61 | ||
62 | struct atmel_lcdfb_config *config; | |
63 | }; | |
64 | ||
b985172b JCPV |
65 | struct atmel_lcdfb_power_ctrl_gpio { |
66 | int gpio; | |
67 | int active_low; | |
68 | ||
69 | struct list_head list; | |
70 | }; | |
71 | ||
14340586 NF |
72 | #define lcdc_readl(sinfo, reg) __raw_readl((sinfo)->mmio+(reg)) |
73 | #define lcdc_writel(sinfo, reg, val) __raw_writel((val), (sinfo)->mmio+(reg)) | |
74 | ||
75 | /* configurable parameters */ | |
76 | #define ATMEL_LCDC_CVAL_DEFAULT 0xc8 | |
53b7479b NF |
77 | #define ATMEL_LCDC_DMA_BURST_LEN 8 /* words */ |
78 | #define ATMEL_LCDC_FIFO_SIZE 512 /* words */ | |
14340586 | 79 | |
bbd44f6b JH |
80 | static struct atmel_lcdfb_config at91sam9261_config = { |
81 | .have_hozval = true, | |
82 | .have_intensity_bit = true, | |
83 | }; | |
84 | ||
85 | static struct atmel_lcdfb_config at91sam9263_config = { | |
86 | .have_intensity_bit = true, | |
87 | }; | |
88 | ||
89 | static struct atmel_lcdfb_config at91sam9g10_config = { | |
90 | .have_hozval = true, | |
91 | }; | |
92 | ||
93 | static struct atmel_lcdfb_config at91sam9g45_config = { | |
94 | .have_alt_pixclock = true, | |
95 | }; | |
96 | ||
97 | static struct atmel_lcdfb_config at91sam9g45es_config = { | |
98 | }; | |
99 | ||
100 | static struct atmel_lcdfb_config at91sam9rl_config = { | |
101 | .have_intensity_bit = true, | |
102 | }; | |
103 | ||
104 | static struct atmel_lcdfb_config at32ap_config = { | |
105 | .have_hozval = true, | |
106 | }; | |
107 | ||
108 | static const struct platform_device_id atmel_lcdfb_devtypes[] = { | |
109 | { | |
110 | .name = "at91sam9261-lcdfb", | |
111 | .driver_data = (unsigned long)&at91sam9261_config, | |
112 | }, { | |
113 | .name = "at91sam9263-lcdfb", | |
114 | .driver_data = (unsigned long)&at91sam9263_config, | |
115 | }, { | |
116 | .name = "at91sam9g10-lcdfb", | |
117 | .driver_data = (unsigned long)&at91sam9g10_config, | |
118 | }, { | |
119 | .name = "at91sam9g45-lcdfb", | |
120 | .driver_data = (unsigned long)&at91sam9g45_config, | |
121 | }, { | |
122 | .name = "at91sam9g45es-lcdfb", | |
123 | .driver_data = (unsigned long)&at91sam9g45es_config, | |
124 | }, { | |
125 | .name = "at91sam9rl-lcdfb", | |
126 | .driver_data = (unsigned long)&at91sam9rl_config, | |
127 | }, { | |
128 | .name = "at32ap-lcdfb", | |
129 | .driver_data = (unsigned long)&at32ap_config, | |
130 | }, { | |
131 | /* terminator */ | |
132 | } | |
133 | }; | |
5a0973f3 | 134 | MODULE_DEVICE_TABLE(platform, atmel_lcdfb_devtypes); |
bbd44f6b JH |
135 | |
136 | static struct atmel_lcdfb_config * | |
137 | atmel_lcdfb_get_config(struct platform_device *pdev) | |
138 | { | |
139 | unsigned long data; | |
140 | ||
141 | data = platform_get_device_id(pdev)->driver_data; | |
142 | ||
143 | return (struct atmel_lcdfb_config *)data; | |
144 | } | |
145 | ||
14340586 | 146 | #if defined(CONFIG_ARCH_AT91) |
e730d8b0 HS |
147 | #define ATMEL_LCDFB_FBINFO_DEFAULT (FBINFO_DEFAULT \ |
148 | | FBINFO_PARTIAL_PAN_OK \ | |
149 | | FBINFO_HWACCEL_YPAN) | |
14340586 NF |
150 | |
151 | static inline void atmel_lcdfb_update_dma2d(struct atmel_lcdfb_info *sinfo, | |
b3e9c129 LP |
152 | struct fb_var_screeninfo *var, |
153 | struct fb_info *info) | |
14340586 NF |
154 | { |
155 | ||
156 | } | |
157 | #elif defined(CONFIG_AVR32) | |
158 | #define ATMEL_LCDFB_FBINFO_DEFAULT (FBINFO_DEFAULT \ | |
159 | | FBINFO_PARTIAL_PAN_OK \ | |
160 | | FBINFO_HWACCEL_XPAN \ | |
161 | | FBINFO_HWACCEL_YPAN) | |
162 | ||
163 | static void atmel_lcdfb_update_dma2d(struct atmel_lcdfb_info *sinfo, | |
b3e9c129 LP |
164 | struct fb_var_screeninfo *var, |
165 | struct fb_info *info) | |
14340586 NF |
166 | { |
167 | u32 dma2dcfg; | |
168 | u32 pixeloff; | |
169 | ||
b3e9c129 | 170 | pixeloff = (var->xoffset * info->var.bits_per_pixel) & 0x1f; |
14340586 | 171 | |
b3e9c129 LP |
172 | dma2dcfg = (info->var.xres_virtual - info->var.xres) |
173 | * info->var.bits_per_pixel / 8; | |
14340586 NF |
174 | dma2dcfg |= pixeloff << ATMEL_LCDC_PIXELOFF_OFFSET; |
175 | lcdc_writel(sinfo, ATMEL_LCDC_DMA2DCFG, dma2dcfg); | |
176 | ||
177 | /* Update configuration */ | |
178 | lcdc_writel(sinfo, ATMEL_LCDC_DMACON, | |
179 | lcdc_readl(sinfo, ATMEL_LCDC_DMACON) | |
180 | | ATMEL_LCDC_DMAUPDT); | |
181 | } | |
182 | #endif | |
183 | ||
7cdcdb69 | 184 | static u32 contrast_ctr = ATMEL_LCDC_PS_DIV8 |
a9a84c37 DB |
185 | | ATMEL_LCDC_POL_POSITIVE |
186 | | ATMEL_LCDC_ENA_PWMENABLE; | |
187 | ||
188 | #ifdef CONFIG_BACKLIGHT_ATMEL_LCDC | |
189 | ||
190 | /* some bl->props field just changed */ | |
191 | static int atmel_bl_update_status(struct backlight_device *bl) | |
192 | { | |
193 | struct atmel_lcdfb_info *sinfo = bl_get_data(bl); | |
194 | int power = sinfo->bl_power; | |
195 | int brightness = bl->props.brightness; | |
196 | ||
197 | /* REVISIT there may be a meaningful difference between | |
198 | * fb_blank and power ... there seem to be some cases | |
199 | * this doesn't handle correctly. | |
200 | */ | |
201 | if (bl->props.fb_blank != sinfo->bl_power) | |
202 | power = bl->props.fb_blank; | |
203 | else if (bl->props.power != sinfo->bl_power) | |
204 | power = bl->props.power; | |
205 | ||
206 | if (brightness < 0 && power == FB_BLANK_UNBLANK) | |
207 | brightness = lcdc_readl(sinfo, ATMEL_LCDC_CONTRAST_VAL); | |
208 | else if (power != FB_BLANK_UNBLANK) | |
209 | brightness = 0; | |
210 | ||
211 | lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_VAL, brightness); | |
acfdc2e1 AS |
212 | if (contrast_ctr & ATMEL_LCDC_POL_POSITIVE) |
213 | lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, | |
a9a84c37 | 214 | brightness ? contrast_ctr : 0); |
acfdc2e1 AS |
215 | else |
216 | lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, contrast_ctr); | |
a9a84c37 DB |
217 | |
218 | bl->props.fb_blank = bl->props.power = sinfo->bl_power = power; | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
223 | static int atmel_bl_get_brightness(struct backlight_device *bl) | |
224 | { | |
225 | struct atmel_lcdfb_info *sinfo = bl_get_data(bl); | |
226 | ||
227 | return lcdc_readl(sinfo, ATMEL_LCDC_CONTRAST_VAL); | |
228 | } | |
229 | ||
acc2472e | 230 | static const struct backlight_ops atmel_lcdc_bl_ops = { |
a9a84c37 DB |
231 | .update_status = atmel_bl_update_status, |
232 | .get_brightness = atmel_bl_get_brightness, | |
233 | }; | |
234 | ||
235 | static void init_backlight(struct atmel_lcdfb_info *sinfo) | |
236 | { | |
a19a6ee6 | 237 | struct backlight_properties props; |
a9a84c37 DB |
238 | struct backlight_device *bl; |
239 | ||
240 | sinfo->bl_power = FB_BLANK_UNBLANK; | |
241 | ||
242 | if (sinfo->backlight) | |
243 | return; | |
244 | ||
a19a6ee6 | 245 | memset(&props, 0, sizeof(struct backlight_properties)); |
bb7ca747 | 246 | props.type = BACKLIGHT_RAW; |
a19a6ee6 MG |
247 | props.max_brightness = 0xff; |
248 | bl = backlight_device_register("backlight", &sinfo->pdev->dev, sinfo, | |
249 | &atmel_lcdc_bl_ops, &props); | |
cf7b9a1e | 250 | if (IS_ERR(bl)) { |
a9a84c37 DB |
251 | dev_err(&sinfo->pdev->dev, "error %ld on backlight register\n", |
252 | PTR_ERR(bl)); | |
253 | return; | |
254 | } | |
255 | sinfo->backlight = bl; | |
256 | ||
257 | bl->props.power = FB_BLANK_UNBLANK; | |
258 | bl->props.fb_blank = FB_BLANK_UNBLANK; | |
a9a84c37 DB |
259 | bl->props.brightness = atmel_bl_get_brightness(bl); |
260 | } | |
261 | ||
262 | static void exit_backlight(struct atmel_lcdfb_info *sinfo) | |
263 | { | |
56c21b53 RG |
264 | if (!sinfo->backlight) |
265 | return; | |
266 | ||
267 | if (sinfo->backlight->ops) { | |
268 | sinfo->backlight->props.power = FB_BLANK_POWERDOWN; | |
269 | sinfo->backlight->ops->update_status(sinfo->backlight); | |
270 | } | |
271 | backlight_device_unregister(sinfo->backlight); | |
a9a84c37 DB |
272 | } |
273 | ||
274 | #else | |
275 | ||
276 | static void init_backlight(struct atmel_lcdfb_info *sinfo) | |
277 | { | |
278 | dev_warn(&sinfo->pdev->dev, "backlight control is not available\n"); | |
279 | } | |
280 | ||
281 | static void exit_backlight(struct atmel_lcdfb_info *sinfo) | |
282 | { | |
283 | } | |
284 | ||
285 | #endif | |
286 | ||
287 | static void init_contrast(struct atmel_lcdfb_info *sinfo) | |
288 | { | |
8af2c286 JCPV |
289 | struct atmel_lcdfb_pdata *pdata = &sinfo->pdata; |
290 | ||
7cdcdb69 | 291 | /* contrast pwm can be 'inverted' */ |
8af2c286 | 292 | if (pdata->lcdcon_pol_negative) |
7cdcdb69 AB |
293 | contrast_ctr &= ~(ATMEL_LCDC_POL_POSITIVE); |
294 | ||
a9a84c37 DB |
295 | /* have some default contrast/backlight settings */ |
296 | lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, contrast_ctr); | |
297 | lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_VAL, ATMEL_LCDC_CVAL_DEFAULT); | |
298 | ||
8af2c286 | 299 | if (pdata->lcdcon_is_backlight) |
a9a84c37 DB |
300 | init_backlight(sinfo); |
301 | } | |
302 | ||
42110e91 JCPV |
303 | static inline void atmel_lcdfb_power_control(struct atmel_lcdfb_info *sinfo, int on) |
304 | { | |
305 | struct atmel_lcdfb_pdata *pdata = &sinfo->pdata; | |
306 | ||
307 | if (pdata->atmel_lcdfb_power_control) | |
ce3b64f5 | 308 | pdata->atmel_lcdfb_power_control(pdata, on); |
42110e91 | 309 | } |
14340586 NF |
310 | |
311 | static struct fb_fix_screeninfo atmel_lcdfb_fix __initdata = { | |
312 | .type = FB_TYPE_PACKED_PIXELS, | |
313 | .visual = FB_VISUAL_TRUECOLOR, | |
314 | .xpanstep = 0, | |
e730d8b0 | 315 | .ypanstep = 1, |
14340586 NF |
316 | .ywrapstep = 0, |
317 | .accel = FB_ACCEL_NONE, | |
318 | }; | |
319 | ||
934a50bd JH |
320 | static unsigned long compute_hozval(struct atmel_lcdfb_info *sinfo, |
321 | unsigned long xres) | |
250a269d | 322 | { |
934a50bd | 323 | unsigned long lcdcon2; |
250a269d NF |
324 | unsigned long value; |
325 | ||
bbd44f6b | 326 | if (!sinfo->config->have_hozval) |
250a269d NF |
327 | return xres; |
328 | ||
934a50bd | 329 | lcdcon2 = lcdc_readl(sinfo, ATMEL_LCDC_LCDCON2); |
250a269d NF |
330 | value = xres; |
331 | if ((lcdcon2 & ATMEL_LCDC_DISTYPE) != ATMEL_LCDC_DISTYPE_TFT) { | |
332 | /* STN display */ | |
333 | if ((lcdcon2 & ATMEL_LCDC_DISTYPE) == ATMEL_LCDC_DISTYPE_STNCOLOR) { | |
334 | value *= 3; | |
335 | } | |
336 | if ( (lcdcon2 & ATMEL_LCDC_IFWIDTH) == ATMEL_LCDC_IFWIDTH_4 | |
337 | || ( (lcdcon2 & ATMEL_LCDC_IFWIDTH) == ATMEL_LCDC_IFWIDTH_8 | |
338 | && (lcdcon2 & ATMEL_LCDC_SCANMOD) == ATMEL_LCDC_SCANMOD_DUAL )) | |
339 | value = DIV_ROUND_UP(value, 4); | |
340 | else | |
341 | value = DIV_ROUND_UP(value, 8); | |
342 | } | |
343 | ||
344 | return value; | |
345 | } | |
14340586 | 346 | |
3aa04f1b HS |
347 | static void atmel_lcdfb_stop_nowait(struct atmel_lcdfb_info *sinfo) |
348 | { | |
8af2c286 JCPV |
349 | struct atmel_lcdfb_pdata *pdata = &sinfo->pdata; |
350 | ||
3aa04f1b HS |
351 | /* Turn off the LCD controller and the DMA controller */ |
352 | lcdc_writel(sinfo, ATMEL_LCDC_PWRCON, | |
8af2c286 | 353 | pdata->guard_time << ATMEL_LCDC_GUARDT_OFFSET); |
3aa04f1b HS |
354 | |
355 | /* Wait for the LCDC core to become idle */ | |
356 | while (lcdc_readl(sinfo, ATMEL_LCDC_PWRCON) & ATMEL_LCDC_BUSY) | |
357 | msleep(10); | |
358 | ||
359 | lcdc_writel(sinfo, ATMEL_LCDC_DMACON, 0); | |
360 | } | |
361 | ||
362 | static void atmel_lcdfb_stop(struct atmel_lcdfb_info *sinfo) | |
363 | { | |
364 | atmel_lcdfb_stop_nowait(sinfo); | |
365 | ||
366 | /* Wait for DMA engine to become idle... */ | |
367 | while (lcdc_readl(sinfo, ATMEL_LCDC_DMACON) & ATMEL_LCDC_DMABUSY) | |
368 | msleep(10); | |
369 | } | |
370 | ||
371 | static void atmel_lcdfb_start(struct atmel_lcdfb_info *sinfo) | |
372 | { | |
8af2c286 JCPV |
373 | struct atmel_lcdfb_pdata *pdata = &sinfo->pdata; |
374 | ||
375 | lcdc_writel(sinfo, ATMEL_LCDC_DMACON, pdata->default_dmacon); | |
3aa04f1b | 376 | lcdc_writel(sinfo, ATMEL_LCDC_PWRCON, |
8af2c286 | 377 | (pdata->guard_time << ATMEL_LCDC_GUARDT_OFFSET) |
3aa04f1b HS |
378 | | ATMEL_LCDC_PWR); |
379 | } | |
380 | ||
14340586 NF |
381 | static void atmel_lcdfb_update_dma(struct fb_info *info, |
382 | struct fb_var_screeninfo *var) | |
383 | { | |
384 | struct atmel_lcdfb_info *sinfo = info->par; | |
385 | struct fb_fix_screeninfo *fix = &info->fix; | |
386 | unsigned long dma_addr; | |
387 | ||
388 | dma_addr = (fix->smem_start + var->yoffset * fix->line_length | |
b3e9c129 | 389 | + var->xoffset * info->var.bits_per_pixel / 8); |
14340586 NF |
390 | |
391 | dma_addr &= ~3UL; | |
392 | ||
393 | /* Set framebuffer DMA base address and pixel offset */ | |
394 | lcdc_writel(sinfo, ATMEL_LCDC_DMABADDR1, dma_addr); | |
395 | ||
b3e9c129 | 396 | atmel_lcdfb_update_dma2d(sinfo, var, info); |
14340586 NF |
397 | } |
398 | ||
399 | static inline void atmel_lcdfb_free_video_memory(struct atmel_lcdfb_info *sinfo) | |
400 | { | |
401 | struct fb_info *info = sinfo->info; | |
402 | ||
403 | dma_free_writecombine(info->device, info->fix.smem_len, | |
404 | info->screen_base, info->fix.smem_start); | |
405 | } | |
406 | ||
407 | /** | |
408 | * atmel_lcdfb_alloc_video_memory - Allocate framebuffer memory | |
409 | * @sinfo: the frame buffer to allocate memory for | |
1d01e835 KH |
410 | * |
411 | * This function is called only from the atmel_lcdfb_probe() | |
412 | * so no locking by fb_info->mm_lock around smem_len setting is needed. | |
14340586 NF |
413 | */ |
414 | static int atmel_lcdfb_alloc_video_memory(struct atmel_lcdfb_info *sinfo) | |
415 | { | |
416 | struct fb_info *info = sinfo->info; | |
417 | struct fb_var_screeninfo *var = &info->var; | |
ea757aca | 418 | unsigned int smem_len; |
14340586 | 419 | |
ea757aca HS |
420 | smem_len = (var->xres_virtual * var->yres_virtual |
421 | * ((var->bits_per_pixel + 7) / 8)); | |
422 | info->fix.smem_len = max(smem_len, sinfo->smem_len); | |
14340586 NF |
423 | |
424 | info->screen_base = dma_alloc_writecombine(info->device, info->fix.smem_len, | |
425 | (dma_addr_t *)&info->fix.smem_start, GFP_KERNEL); | |
426 | ||
427 | if (!info->screen_base) { | |
428 | return -ENOMEM; | |
429 | } | |
430 | ||
01d3a5e7 HS |
431 | memset(info->screen_base, 0, info->fix.smem_len); |
432 | ||
14340586 NF |
433 | return 0; |
434 | } | |
435 | ||
968910bd NF |
436 | static const struct fb_videomode *atmel_lcdfb_choose_mode(struct fb_var_screeninfo *var, |
437 | struct fb_info *info) | |
438 | { | |
439 | struct fb_videomode varfbmode; | |
440 | const struct fb_videomode *fbmode = NULL; | |
441 | ||
442 | fb_var_to_videomode(&varfbmode, var); | |
443 | fbmode = fb_find_nearest_mode(&varfbmode, &info->modelist); | |
444 | if (fbmode) | |
445 | fb_videomode_to_var(var, fbmode); | |
446 | return fbmode; | |
447 | } | |
448 | ||
449 | ||
14340586 NF |
450 | /** |
451 | * atmel_lcdfb_check_var - Validates a var passed in. | |
452 | * @var: frame buffer variable screen structure | |
453 | * @info: frame buffer structure that represents a single frame buffer | |
454 | * | |
455 | * Checks to see if the hardware supports the state requested by | |
456 | * var passed in. This function does not alter the hardware | |
457 | * state!!! This means the data stored in struct fb_info and | |
458 | * struct atmel_lcdfb_info do not change. This includes the var | |
459 | * inside of struct fb_info. Do NOT change these. This function | |
460 | * can be called on its own if we intent to only test a mode and | |
461 | * not actually set it. The stuff in modedb.c is a example of | |
462 | * this. If the var passed in is slightly off by what the | |
463 | * hardware can support then we alter the var PASSED in to what | |
464 | * we can do. If the hardware doesn't support mode change a | |
465 | * -EINVAL will be returned by the upper layers. You don't need | |
466 | * to implement this function then. If you hardware doesn't | |
467 | * support changing the resolution then this function is not | |
468 | * needed. In this case the driver would just provide a var that | |
469 | * represents the static state the screen is in. | |
470 | * | |
471 | * Returns negative errno on error, or zero on success. | |
472 | */ | |
473 | static int atmel_lcdfb_check_var(struct fb_var_screeninfo *var, | |
474 | struct fb_info *info) | |
475 | { | |
476 | struct device *dev = info->device; | |
477 | struct atmel_lcdfb_info *sinfo = info->par; | |
8af2c286 | 478 | struct atmel_lcdfb_pdata *pdata = &sinfo->pdata; |
14340586 NF |
479 | unsigned long clk_value_khz; |
480 | ||
481 | clk_value_khz = clk_get_rate(sinfo->lcdc_clk) / 1000; | |
482 | ||
483 | dev_dbg(dev, "%s:\n", __func__); | |
968910bd NF |
484 | |
485 | if (!(var->pixclock && var->bits_per_pixel)) { | |
486 | /* choose a suitable mode if possible */ | |
487 | if (!atmel_lcdfb_choose_mode(var, info)) { | |
488 | dev_err(dev, "needed value not specified\n"); | |
489 | return -EINVAL; | |
490 | } | |
491 | } | |
492 | ||
14340586 NF |
493 | dev_dbg(dev, " resolution: %ux%u\n", var->xres, var->yres); |
494 | dev_dbg(dev, " pixclk: %lu KHz\n", PICOS2KHZ(var->pixclock)); | |
495 | dev_dbg(dev, " bpp: %u\n", var->bits_per_pixel); | |
496 | dev_dbg(dev, " clk: %lu KHz\n", clk_value_khz); | |
497 | ||
97b9a5a2 | 498 | if (PICOS2KHZ(var->pixclock) > clk_value_khz) { |
14340586 NF |
499 | dev_err(dev, "%lu KHz pixel clock is too fast\n", PICOS2KHZ(var->pixclock)); |
500 | return -EINVAL; | |
501 | } | |
502 | ||
968910bd NF |
503 | /* Do not allow to have real resoulution larger than virtual */ |
504 | if (var->xres > var->xres_virtual) | |
505 | var->xres_virtual = var->xres; | |
506 | ||
507 | if (var->yres > var->yres_virtual) | |
508 | var->yres_virtual = var->yres; | |
509 | ||
14340586 NF |
510 | /* Force same alignment for each line */ |
511 | var->xres = (var->xres + 3) & ~3UL; | |
512 | var->xres_virtual = (var->xres_virtual + 3) & ~3UL; | |
513 | ||
514 | var->red.msb_right = var->green.msb_right = var->blue.msb_right = 0; | |
515 | var->transp.msb_right = 0; | |
516 | var->transp.offset = var->transp.length = 0; | |
517 | var->xoffset = var->yoffset = 0; | |
518 | ||
f928ac0a SG |
519 | if (info->fix.smem_len) { |
520 | unsigned int smem_len = (var->xres_virtual * var->yres_virtual | |
521 | * ((var->bits_per_pixel + 7) / 8)); | |
65ac057b RG |
522 | if (smem_len > info->fix.smem_len) { |
523 | dev_err(dev, "Frame buffer is too small (%u) for screen size (need at least %u)\n", | |
524 | info->fix.smem_len, smem_len); | |
f928ac0a | 525 | return -EINVAL; |
65ac057b | 526 | } |
f928ac0a SG |
527 | } |
528 | ||
162b3a08 HS |
529 | /* Saturate vertical and horizontal timings at maximum values */ |
530 | var->vsync_len = min_t(u32, var->vsync_len, | |
531 | (ATMEL_LCDC_VPW >> ATMEL_LCDC_VPW_OFFSET) + 1); | |
532 | var->upper_margin = min_t(u32, var->upper_margin, | |
533 | ATMEL_LCDC_VBP >> ATMEL_LCDC_VBP_OFFSET); | |
534 | var->lower_margin = min_t(u32, var->lower_margin, | |
535 | ATMEL_LCDC_VFP); | |
536 | var->right_margin = min_t(u32, var->right_margin, | |
6b3cbe40 | 537 | (ATMEL_LCDC_HFP >> ATMEL_LCDC_HFP_OFFSET) + 1); |
162b3a08 HS |
538 | var->hsync_len = min_t(u32, var->hsync_len, |
539 | (ATMEL_LCDC_HPW >> ATMEL_LCDC_HPW_OFFSET) + 1); | |
540 | var->left_margin = min_t(u32, var->left_margin, | |
541 | ATMEL_LCDC_HBP + 1); | |
542 | ||
543 | /* Some parameters can't be zero */ | |
544 | var->vsync_len = max_t(u32, var->vsync_len, 1); | |
545 | var->right_margin = max_t(u32, var->right_margin, 1); | |
546 | var->hsync_len = max_t(u32, var->hsync_len, 1); | |
547 | var->left_margin = max_t(u32, var->left_margin, 1); | |
548 | ||
14340586 | 549 | switch (var->bits_per_pixel) { |
250a269d | 550 | case 1: |
14340586 NF |
551 | case 2: |
552 | case 4: | |
553 | case 8: | |
554 | var->red.offset = var->green.offset = var->blue.offset = 0; | |
555 | var->red.length = var->green.length = var->blue.length | |
556 | = var->bits_per_pixel; | |
557 | break; | |
14340586 | 558 | case 16: |
a79eac71 | 559 | /* Older SOCs use IBGR:555 rather than BGR:565. */ |
bbd44f6b | 560 | if (sinfo->config->have_intensity_bit) |
a79eac71 JH |
561 | var->green.length = 5; |
562 | else | |
563 | var->green.length = 6; | |
564 | ||
8af2c286 | 565 | if (pdata->lcd_wiring_mode == ATMEL_LCDC_WIRING_RGB) { |
a79eac71 JH |
566 | /* RGB:5X5 mode */ |
567 | var->red.offset = var->green.length + 5; | |
fd085801 | 568 | var->blue.offset = 0; |
fd085801 | 569 | } else { |
a79eac71 | 570 | /* BGR:5X5 mode */ |
fd085801 | 571 | var->red.offset = 0; |
a79eac71 | 572 | var->blue.offset = var->green.length + 5; |
fd085801 | 573 | } |
14340586 | 574 | var->green.offset = 5; |
fd085801 | 575 | var->red.length = var->blue.length = 5; |
14340586 | 576 | break; |
14340586 | 577 | case 32: |
4440e0e1 HS |
578 | var->transp.offset = 24; |
579 | var->transp.length = 8; | |
580 | /* fall through */ | |
581 | case 24: | |
8af2c286 | 582 | if (pdata->lcd_wiring_mode == ATMEL_LCDC_WIRING_RGB) { |
fd085801 NF |
583 | /* RGB:888 mode */ |
584 | var->red.offset = 16; | |
585 | var->blue.offset = 0; | |
586 | } else { | |
587 | /* BGR:888 mode */ | |
588 | var->red.offset = 0; | |
589 | var->blue.offset = 16; | |
590 | } | |
14340586 | 591 | var->green.offset = 8; |
14340586 NF |
592 | var->red.length = var->green.length = var->blue.length = 8; |
593 | break; | |
594 | default: | |
595 | dev_err(dev, "color depth %d not supported\n", | |
596 | var->bits_per_pixel); | |
597 | return -EINVAL; | |
598 | } | |
599 | ||
600 | return 0; | |
601 | } | |
602 | ||
d22579b8 NF |
603 | /* |
604 | * LCD reset sequence | |
605 | */ | |
606 | static void atmel_lcdfb_reset(struct atmel_lcdfb_info *sinfo) | |
607 | { | |
608 | might_sleep(); | |
609 | ||
3aa04f1b HS |
610 | atmel_lcdfb_stop(sinfo); |
611 | atmel_lcdfb_start(sinfo); | |
d22579b8 NF |
612 | } |
613 | ||
14340586 NF |
614 | /** |
615 | * atmel_lcdfb_set_par - Alters the hardware state. | |
616 | * @info: frame buffer structure that represents a single frame buffer | |
617 | * | |
618 | * Using the fb_var_screeninfo in fb_info we set the resolution | |
619 | * of the this particular framebuffer. This function alters the | |
620 | * par AND the fb_fix_screeninfo stored in fb_info. It doesn't | |
621 | * not alter var in fb_info since we are using that data. This | |
622 | * means we depend on the data in var inside fb_info to be | |
623 | * supported by the hardware. atmel_lcdfb_check_var is always called | |
624 | * before atmel_lcdfb_set_par to ensure this. Again if you can't | |
625 | * change the resolution you don't need this function. | |
626 | * | |
627 | */ | |
628 | static int atmel_lcdfb_set_par(struct fb_info *info) | |
629 | { | |
630 | struct atmel_lcdfb_info *sinfo = info->par; | |
8af2c286 | 631 | struct atmel_lcdfb_pdata *pdata = &sinfo->pdata; |
250a269d | 632 | unsigned long hozval_linesz; |
14340586 NF |
633 | unsigned long value; |
634 | unsigned long clk_value_khz; | |
250a269d | 635 | unsigned long bits_per_line; |
431861cf | 636 | unsigned long pix_factor = 2; |
14340586 | 637 | |
d22579b8 NF |
638 | might_sleep(); |
639 | ||
14340586 NF |
640 | dev_dbg(info->device, "%s:\n", __func__); |
641 | dev_dbg(info->device, " * resolution: %ux%u (%ux%u virtual)\n", | |
642 | info->var.xres, info->var.yres, | |
643 | info->var.xres_virtual, info->var.yres_virtual); | |
644 | ||
3aa04f1b | 645 | atmel_lcdfb_stop_nowait(sinfo); |
14340586 | 646 | |
250a269d NF |
647 | if (info->var.bits_per_pixel == 1) |
648 | info->fix.visual = FB_VISUAL_MONO01; | |
649 | else if (info->var.bits_per_pixel <= 8) | |
14340586 NF |
650 | info->fix.visual = FB_VISUAL_PSEUDOCOLOR; |
651 | else | |
652 | info->fix.visual = FB_VISUAL_TRUECOLOR; | |
653 | ||
250a269d NF |
654 | bits_per_line = info->var.xres_virtual * info->var.bits_per_pixel; |
655 | info->fix.line_length = DIV_ROUND_UP(bits_per_line, 8); | |
14340586 NF |
656 | |
657 | /* Re-initialize the DMA engine... */ | |
658 | dev_dbg(info->device, " * update DMA engine\n"); | |
659 | atmel_lcdfb_update_dma(info, &info->var); | |
660 | ||
661 | /* ...set frame size and burst length = 8 words (?) */ | |
662 | value = (info->var.yres * info->var.xres * info->var.bits_per_pixel) / 32; | |
663 | value |= ((ATMEL_LCDC_DMA_BURST_LEN - 1) << ATMEL_LCDC_BLENGTH_OFFSET); | |
664 | lcdc_writel(sinfo, ATMEL_LCDC_DMAFRMCFG, value); | |
665 | ||
666 | /* Now, the LCDC core... */ | |
667 | ||
668 | /* Set pixel clock */ | |
bbd44f6b | 669 | if (sinfo->config->have_alt_pixclock) |
431861cf NF |
670 | pix_factor = 1; |
671 | ||
14340586 NF |
672 | clk_value_khz = clk_get_rate(sinfo->lcdc_clk) / 1000; |
673 | ||
250a269d | 674 | value = DIV_ROUND_UP(clk_value_khz, PICOS2KHZ(info->var.pixclock)); |
14340586 | 675 | |
431861cf | 676 | if (value < pix_factor) { |
14340586 NF |
677 | dev_notice(info->device, "Bypassing pixel clock divider\n"); |
678 | lcdc_writel(sinfo, ATMEL_LCDC_LCDCON1, ATMEL_LCDC_BYPASS); | |
250a269d | 679 | } else { |
431861cf | 680 | value = (value / pix_factor) - 1; |
baf6332a NF |
681 | dev_dbg(info->device, " * programming CLKVAL = 0x%08lx\n", |
682 | value); | |
683 | lcdc_writel(sinfo, ATMEL_LCDC_LCDCON1, | |
684 | value << ATMEL_LCDC_CLKVAL_OFFSET); | |
431861cf NF |
685 | info->var.pixclock = |
686 | KHZ2PICOS(clk_value_khz / (pix_factor * (value + 1))); | |
250a269d NF |
687 | dev_dbg(info->device, " updated pixclk: %lu KHz\n", |
688 | PICOS2KHZ(info->var.pixclock)); | |
689 | } | |
690 | ||
14340586 NF |
691 | |
692 | /* Initialize control register 2 */ | |
8af2c286 | 693 | value = pdata->default_lcdcon2; |
14340586 NF |
694 | |
695 | if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT)) | |
696 | value |= ATMEL_LCDC_INVLINE_INVERTED; | |
697 | if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT)) | |
698 | value |= ATMEL_LCDC_INVFRAME_INVERTED; | |
699 | ||
700 | switch (info->var.bits_per_pixel) { | |
701 | case 1: value |= ATMEL_LCDC_PIXELSIZE_1; break; | |
702 | case 2: value |= ATMEL_LCDC_PIXELSIZE_2; break; | |
703 | case 4: value |= ATMEL_LCDC_PIXELSIZE_4; break; | |
704 | case 8: value |= ATMEL_LCDC_PIXELSIZE_8; break; | |
705 | case 15: /* fall through */ | |
706 | case 16: value |= ATMEL_LCDC_PIXELSIZE_16; break; | |
707 | case 24: value |= ATMEL_LCDC_PIXELSIZE_24; break; | |
708 | case 32: value |= ATMEL_LCDC_PIXELSIZE_32; break; | |
709 | default: BUG(); break; | |
710 | } | |
711 | dev_dbg(info->device, " * LCDCON2 = %08lx\n", value); | |
712 | lcdc_writel(sinfo, ATMEL_LCDC_LCDCON2, value); | |
713 | ||
714 | /* Vertical timing */ | |
715 | value = (info->var.vsync_len - 1) << ATMEL_LCDC_VPW_OFFSET; | |
716 | value |= info->var.upper_margin << ATMEL_LCDC_VBP_OFFSET; | |
717 | value |= info->var.lower_margin; | |
718 | dev_dbg(info->device, " * LCDTIM1 = %08lx\n", value); | |
719 | lcdc_writel(sinfo, ATMEL_LCDC_TIM1, value); | |
720 | ||
721 | /* Horizontal timing */ | |
6b3cbe40 | 722 | value = (info->var.right_margin - 1) << ATMEL_LCDC_HFP_OFFSET; |
14340586 NF |
723 | value |= (info->var.hsync_len - 1) << ATMEL_LCDC_HPW_OFFSET; |
724 | value |= (info->var.left_margin - 1); | |
725 | dev_dbg(info->device, " * LCDTIM2 = %08lx\n", value); | |
726 | lcdc_writel(sinfo, ATMEL_LCDC_TIM2, value); | |
727 | ||
250a269d | 728 | /* Horizontal value (aka line size) */ |
934a50bd | 729 | hozval_linesz = compute_hozval(sinfo, info->var.xres); |
250a269d | 730 | |
14340586 | 731 | /* Display size */ |
250a269d | 732 | value = (hozval_linesz - 1) << ATMEL_LCDC_HOZVAL_OFFSET; |
14340586 | 733 | value |= info->var.yres - 1; |
250a269d | 734 | dev_dbg(info->device, " * LCDFRMCFG = %08lx\n", value); |
14340586 NF |
735 | lcdc_writel(sinfo, ATMEL_LCDC_LCDFRMCFG, value); |
736 | ||
737 | /* FIFO Threshold: Use formula from data sheet */ | |
738 | value = ATMEL_LCDC_FIFO_SIZE - (2 * ATMEL_LCDC_DMA_BURST_LEN + 3); | |
739 | lcdc_writel(sinfo, ATMEL_LCDC_FIFO, value); | |
740 | ||
741 | /* Toggle LCD_MODE every frame */ | |
742 | lcdc_writel(sinfo, ATMEL_LCDC_MVAL, 0); | |
743 | ||
744 | /* Disable all interrupts */ | |
745 | lcdc_writel(sinfo, ATMEL_LCDC_IDR, ~0UL); | |
d22579b8 NF |
746 | /* Enable FIFO & DMA errors */ |
747 | lcdc_writel(sinfo, ATMEL_LCDC_IER, ATMEL_LCDC_UFLWI | ATMEL_LCDC_OWRI | ATMEL_LCDC_MERI); | |
14340586 | 748 | |
14340586 NF |
749 | /* ...wait for DMA engine to become idle... */ |
750 | while (lcdc_readl(sinfo, ATMEL_LCDC_DMACON) & ATMEL_LCDC_DMABUSY) | |
751 | msleep(10); | |
752 | ||
3aa04f1b | 753 | atmel_lcdfb_start(sinfo); |
14340586 NF |
754 | |
755 | dev_dbg(info->device, " * DONE\n"); | |
756 | ||
757 | return 0; | |
758 | } | |
759 | ||
760 | static inline unsigned int chan_to_field(unsigned int chan, const struct fb_bitfield *bf) | |
761 | { | |
762 | chan &= 0xffff; | |
763 | chan >>= 16 - bf->length; | |
764 | return chan << bf->offset; | |
765 | } | |
766 | ||
767 | /** | |
768 | * atmel_lcdfb_setcolreg - Optional function. Sets a color register. | |
769 | * @regno: Which register in the CLUT we are programming | |
770 | * @red: The red value which can be up to 16 bits wide | |
771 | * @green: The green value which can be up to 16 bits wide | |
772 | * @blue: The blue value which can be up to 16 bits wide. | |
773 | * @transp: If supported the alpha value which can be up to 16 bits wide. | |
774 | * @info: frame buffer info structure | |
775 | * | |
776 | * Set a single color register. The values supplied have a 16 bit | |
777 | * magnitude which needs to be scaled in this function for the hardware. | |
778 | * Things to take into consideration are how many color registers, if | |
779 | * any, are supported with the current color visual. With truecolor mode | |
25985edc | 780 | * no color palettes are supported. Here a pseudo palette is created |
14340586 NF |
781 | * which we store the value in pseudo_palette in struct fb_info. For |
782 | * pseudocolor mode we have a limited color palette. To deal with this | |
783 | * we can program what color is displayed for a particular pixel value. | |
784 | * DirectColor is similar in that we can program each color field. If | |
785 | * we have a static colormap we don't need to implement this function. | |
786 | * | |
787 | * Returns negative errno on error, or zero on success. In an | |
788 | * ideal world, this would have been the case, but as it turns | |
789 | * out, the other drivers return 1 on failure, so that's what | |
790 | * we're going to do. | |
791 | */ | |
792 | static int atmel_lcdfb_setcolreg(unsigned int regno, unsigned int red, | |
793 | unsigned int green, unsigned int blue, | |
794 | unsigned int transp, struct fb_info *info) | |
795 | { | |
796 | struct atmel_lcdfb_info *sinfo = info->par; | |
8af2c286 | 797 | struct atmel_lcdfb_pdata *pdata = &sinfo->pdata; |
14340586 NF |
798 | unsigned int val; |
799 | u32 *pal; | |
800 | int ret = 1; | |
801 | ||
802 | if (info->var.grayscale) | |
803 | red = green = blue = (19595 * red + 38470 * green | |
804 | + 7471 * blue) >> 16; | |
805 | ||
806 | switch (info->fix.visual) { | |
807 | case FB_VISUAL_TRUECOLOR: | |
808 | if (regno < 16) { | |
809 | pal = info->pseudo_palette; | |
810 | ||
811 | val = chan_to_field(red, &info->var.red); | |
812 | val |= chan_to_field(green, &info->var.green); | |
813 | val |= chan_to_field(blue, &info->var.blue); | |
814 | ||
815 | pal[regno] = val; | |
816 | ret = 0; | |
817 | } | |
818 | break; | |
819 | ||
820 | case FB_VISUAL_PSEUDOCOLOR: | |
821 | if (regno < 256) { | |
bbd44f6b | 822 | if (sinfo->config->have_intensity_bit) { |
5d67b89c PK |
823 | /* old style I+BGR:555 */ |
824 | val = ((red >> 11) & 0x001f); | |
825 | val |= ((green >> 6) & 0x03e0); | |
826 | val |= ((blue >> 1) & 0x7c00); | |
827 | ||
828 | /* | |
829 | * TODO: intensity bit. Maybe something like | |
830 | * ~(red[10] ^ green[10] ^ blue[10]) & 1 | |
831 | */ | |
832 | } else { | |
833 | /* new style BGR:565 / RGB:565 */ | |
8af2c286 | 834 | if (pdata->lcd_wiring_mode == ATMEL_LCDC_WIRING_RGB) { |
5d67b89c PK |
835 | val = ((blue >> 11) & 0x001f); |
836 | val |= ((red >> 0) & 0xf800); | |
837 | } else { | |
838 | val = ((red >> 11) & 0x001f); | |
839 | val |= ((blue >> 0) & 0xf800); | |
840 | } | |
841 | ||
842 | val |= ((green >> 5) & 0x07e0); | |
843 | } | |
14340586 NF |
844 | |
845 | lcdc_writel(sinfo, ATMEL_LCDC_LUT(regno), val); | |
846 | ret = 0; | |
847 | } | |
848 | break; | |
250a269d NF |
849 | |
850 | case FB_VISUAL_MONO01: | |
851 | if (regno < 2) { | |
852 | val = (regno == 0) ? 0x00 : 0x1F; | |
853 | lcdc_writel(sinfo, ATMEL_LCDC_LUT(regno), val); | |
854 | ret = 0; | |
855 | } | |
856 | break; | |
857 | ||
14340586 NF |
858 | } |
859 | ||
860 | return ret; | |
861 | } | |
862 | ||
863 | static int atmel_lcdfb_pan_display(struct fb_var_screeninfo *var, | |
864 | struct fb_info *info) | |
865 | { | |
866 | dev_dbg(info->device, "%s\n", __func__); | |
867 | ||
868 | atmel_lcdfb_update_dma(info, var); | |
869 | ||
870 | return 0; | |
871 | } | |
872 | ||
bed7bddb AB |
873 | static int atmel_lcdfb_blank(int blank_mode, struct fb_info *info) |
874 | { | |
875 | struct atmel_lcdfb_info *sinfo = info->par; | |
876 | ||
877 | switch (blank_mode) { | |
878 | case FB_BLANK_UNBLANK: | |
879 | case FB_BLANK_NORMAL: | |
880 | atmel_lcdfb_start(sinfo); | |
881 | break; | |
882 | case FB_BLANK_VSYNC_SUSPEND: | |
883 | case FB_BLANK_HSYNC_SUSPEND: | |
884 | break; | |
885 | case FB_BLANK_POWERDOWN: | |
886 | atmel_lcdfb_stop(sinfo); | |
887 | break; | |
888 | default: | |
889 | return -EINVAL; | |
890 | } | |
891 | ||
892 | /* let fbcon do a soft blank for us */ | |
893 | return ((blank_mode == FB_BLANK_NORMAL) ? 1 : 0); | |
894 | } | |
895 | ||
14340586 NF |
896 | static struct fb_ops atmel_lcdfb_ops = { |
897 | .owner = THIS_MODULE, | |
898 | .fb_check_var = atmel_lcdfb_check_var, | |
899 | .fb_set_par = atmel_lcdfb_set_par, | |
900 | .fb_setcolreg = atmel_lcdfb_setcolreg, | |
bed7bddb | 901 | .fb_blank = atmel_lcdfb_blank, |
14340586 NF |
902 | .fb_pan_display = atmel_lcdfb_pan_display, |
903 | .fb_fillrect = cfb_fillrect, | |
904 | .fb_copyarea = cfb_copyarea, | |
905 | .fb_imageblit = cfb_imageblit, | |
906 | }; | |
907 | ||
908 | static irqreturn_t atmel_lcdfb_interrupt(int irq, void *dev_id) | |
909 | { | |
910 | struct fb_info *info = dev_id; | |
911 | struct atmel_lcdfb_info *sinfo = info->par; | |
912 | u32 status; | |
913 | ||
914 | status = lcdc_readl(sinfo, ATMEL_LCDC_ISR); | |
d22579b8 NF |
915 | if (status & ATMEL_LCDC_UFLWI) { |
916 | dev_warn(info->device, "FIFO underflow %#x\n", status); | |
917 | /* reset DMA and FIFO to avoid screen shifting */ | |
918 | schedule_work(&sinfo->task); | |
919 | } | |
920 | lcdc_writel(sinfo, ATMEL_LCDC_ICR, status); | |
14340586 NF |
921 | return IRQ_HANDLED; |
922 | } | |
923 | ||
d22579b8 NF |
924 | /* |
925 | * LCD controller task (to reset the LCD) | |
926 | */ | |
927 | static void atmel_lcdfb_task(struct work_struct *work) | |
928 | { | |
929 | struct atmel_lcdfb_info *sinfo = | |
930 | container_of(work, struct atmel_lcdfb_info, task); | |
931 | ||
932 | atmel_lcdfb_reset(sinfo); | |
933 | } | |
934 | ||
14340586 NF |
935 | static int __init atmel_lcdfb_init_fbinfo(struct atmel_lcdfb_info *sinfo) |
936 | { | |
937 | struct fb_info *info = sinfo->info; | |
938 | int ret = 0; | |
939 | ||
14340586 NF |
940 | info->var.activate |= FB_ACTIVATE_FORCE | FB_ACTIVATE_NOW; |
941 | ||
942 | dev_info(info->device, | |
943 | "%luKiB frame buffer at %08lx (mapped at %p)\n", | |
944 | (unsigned long)info->fix.smem_len / 1024, | |
945 | (unsigned long)info->fix.smem_start, | |
946 | info->screen_base); | |
947 | ||
948 | /* Allocate colormap */ | |
949 | ret = fb_alloc_cmap(&info->cmap, 256, 0); | |
950 | if (ret < 0) | |
951 | dev_err(info->device, "Alloc color map failed\n"); | |
952 | ||
953 | return ret; | |
954 | } | |
955 | ||
956 | static void atmel_lcdfb_start_clock(struct atmel_lcdfb_info *sinfo) | |
957 | { | |
6e665fb3 BB |
958 | clk_prepare_enable(sinfo->bus_clk); |
959 | clk_prepare_enable(sinfo->lcdc_clk); | |
14340586 NF |
960 | } |
961 | ||
962 | static void atmel_lcdfb_stop_clock(struct atmel_lcdfb_info *sinfo) | |
963 | { | |
6e665fb3 BB |
964 | clk_disable_unprepare(sinfo->bus_clk); |
965 | clk_disable_unprepare(sinfo->lcdc_clk); | |
14340586 NF |
966 | } |
967 | ||
b985172b JCPV |
968 | #ifdef CONFIG_OF |
969 | static const struct of_device_id atmel_lcdfb_dt_ids[] = { | |
970 | { .compatible = "atmel,at91sam9261-lcdc" , .data = &at91sam9261_config, }, | |
971 | { .compatible = "atmel,at91sam9263-lcdc" , .data = &at91sam9263_config, }, | |
972 | { .compatible = "atmel,at91sam9g10-lcdc" , .data = &at91sam9g10_config, }, | |
973 | { .compatible = "atmel,at91sam9g45-lcdc" , .data = &at91sam9g45_config, }, | |
974 | { .compatible = "atmel,at91sam9g45es-lcdc" , .data = &at91sam9g45es_config, }, | |
975 | { .compatible = "atmel,at91sam9rl-lcdc" , .data = &at91sam9rl_config, }, | |
976 | { .compatible = "atmel,at32ap-lcdc" , .data = &at32ap_config, }, | |
977 | { /* sentinel */ } | |
978 | }; | |
979 | ||
980 | MODULE_DEVICE_TABLE(of, atmel_lcdfb_dt_ids); | |
981 | ||
982 | static const char *atmel_lcdfb_wiring_modes[] = { | |
983 | [ATMEL_LCDC_WIRING_BGR] = "BRG", | |
984 | [ATMEL_LCDC_WIRING_RGB] = "RGB", | |
985 | }; | |
986 | ||
987 | const int atmel_lcdfb_get_of_wiring_modes(struct device_node *np) | |
988 | { | |
989 | const char *mode; | |
990 | int err, i; | |
991 | ||
992 | err = of_property_read_string(np, "atmel,lcd-wiring-mode", &mode); | |
993 | if (err < 0) | |
994 | return ATMEL_LCDC_WIRING_BGR; | |
995 | ||
996 | for (i = 0; i < ARRAY_SIZE(atmel_lcdfb_wiring_modes); i++) | |
997 | if (!strcasecmp(mode, atmel_lcdfb_wiring_modes[i])) | |
998 | return i; | |
999 | ||
1000 | return -ENODEV; | |
1001 | } | |
1002 | ||
1003 | static void atmel_lcdfb_power_control_gpio(struct atmel_lcdfb_pdata *pdata, int on) | |
1004 | { | |
1005 | struct atmel_lcdfb_power_ctrl_gpio *og; | |
1006 | ||
1007 | list_for_each_entry(og, &pdata->pwr_gpios, list) | |
1008 | gpio_set_value(og->gpio, on); | |
1009 | } | |
1010 | ||
1011 | static int atmel_lcdfb_of_init(struct atmel_lcdfb_info *sinfo) | |
1012 | { | |
1013 | struct fb_info *info = sinfo->info; | |
1014 | struct atmel_lcdfb_pdata *pdata = &sinfo->pdata; | |
1015 | struct fb_var_screeninfo *var = &info->var; | |
1016 | struct device *dev = &sinfo->pdev->dev; | |
1017 | struct device_node *np =dev->of_node; | |
1018 | struct device_node *display_np; | |
1019 | struct device_node *timings_np; | |
1020 | struct display_timings *timings; | |
1021 | enum of_gpio_flags flags; | |
1022 | struct atmel_lcdfb_power_ctrl_gpio *og; | |
1023 | bool is_gpio_power = false; | |
1024 | int ret = -ENOENT; | |
1025 | int i, gpio; | |
1026 | ||
1027 | sinfo->config = (struct atmel_lcdfb_config*) | |
1028 | of_match_device(atmel_lcdfb_dt_ids, dev)->data; | |
1029 | ||
1030 | display_np = of_parse_phandle(np, "display", 0); | |
1031 | if (!display_np) { | |
1032 | dev_err(dev, "failed to find display phandle\n"); | |
1033 | return -ENOENT; | |
1034 | } | |
1035 | ||
1036 | ret = of_property_read_u32(display_np, "bits-per-pixel", &var->bits_per_pixel); | |
1037 | if (ret < 0) { | |
1038 | dev_err(dev, "failed to get property bits-per-pixel\n"); | |
1039 | goto put_display_node; | |
1040 | } | |
1041 | ||
1042 | ret = of_property_read_u32(display_np, "atmel,guard-time", &pdata->guard_time); | |
1043 | if (ret < 0) { | |
1044 | dev_err(dev, "failed to get property atmel,guard-time\n"); | |
1045 | goto put_display_node; | |
1046 | } | |
1047 | ||
1048 | ret = of_property_read_u32(display_np, "atmel,lcdcon2", &pdata->default_lcdcon2); | |
1049 | if (ret < 0) { | |
1050 | dev_err(dev, "failed to get property atmel,lcdcon2\n"); | |
1051 | goto put_display_node; | |
1052 | } | |
1053 | ||
1054 | ret = of_property_read_u32(display_np, "atmel,dmacon", &pdata->default_dmacon); | |
1055 | if (ret < 0) { | |
1056 | dev_err(dev, "failed to get property bits-per-pixel\n"); | |
1057 | goto put_display_node; | |
1058 | } | |
1059 | ||
1060 | ret = -ENOMEM; | |
1061 | for (i = 0; i < of_gpio_named_count(display_np, "atmel,power-control-gpio"); i++) { | |
1062 | gpio = of_get_named_gpio_flags(display_np, "atmel,power-control-gpio", | |
1063 | i, &flags); | |
1064 | if (gpio < 0) | |
1065 | continue; | |
1066 | ||
1067 | og = devm_kzalloc(dev, sizeof(*og), GFP_KERNEL); | |
1068 | if (!og) | |
1069 | goto put_display_node; | |
1070 | ||
1071 | og->gpio = gpio; | |
1072 | og->active_low = flags & OF_GPIO_ACTIVE_LOW; | |
1073 | is_gpio_power = true; | |
1074 | ret = devm_gpio_request(dev, gpio, "lcd-power-control-gpio"); | |
1075 | if (ret) { | |
1076 | dev_err(dev, "request gpio %d failed\n", gpio); | |
1077 | goto put_display_node; | |
1078 | } | |
1079 | ||
1080 | ret = gpio_direction_output(gpio, og->active_low); | |
1081 | if (ret) { | |
1082 | dev_err(dev, "set direction output gpio %d failed\n", gpio); | |
1083 | goto put_display_node; | |
1084 | } | |
1085 | } | |
1086 | ||
1087 | if (is_gpio_power) | |
1088 | pdata->atmel_lcdfb_power_control = atmel_lcdfb_power_control_gpio; | |
1089 | ||
1090 | ret = atmel_lcdfb_get_of_wiring_modes(display_np); | |
1091 | if (ret < 0) { | |
1092 | dev_err(dev, "invalid atmel,lcd-wiring-mode\n"); | |
1093 | goto put_display_node; | |
1094 | } | |
1095 | pdata->lcd_wiring_mode = ret; | |
1096 | ||
1097 | pdata->lcdcon_is_backlight = of_property_read_bool(display_np, "atmel,lcdcon-backlight"); | |
1098 | ||
1099 | timings = of_get_display_timings(display_np); | |
1100 | if (!timings) { | |
1101 | dev_err(dev, "failed to get display timings\n"); | |
1102 | goto put_display_node; | |
1103 | } | |
1104 | ||
1105 | timings_np = of_find_node_by_name(display_np, "display-timings"); | |
1106 | if (!timings_np) { | |
1107 | dev_err(dev, "failed to find display-timings node\n"); | |
1108 | goto put_display_node; | |
1109 | } | |
1110 | ||
1111 | for (i = 0; i < of_get_child_count(timings_np); i++) { | |
1112 | struct videomode vm; | |
1113 | struct fb_videomode fb_vm; | |
1114 | ||
1115 | ret = videomode_from_timings(timings, &vm, i); | |
1116 | if (ret < 0) | |
1117 | goto put_timings_node; | |
1118 | ret = fb_videomode_from_videomode(&vm, &fb_vm); | |
1119 | if (ret < 0) | |
1120 | goto put_timings_node; | |
1121 | ||
1122 | fb_add_videomode(&fb_vm, &info->modelist); | |
1123 | } | |
1124 | ||
1125 | return 0; | |
1126 | ||
1127 | put_timings_node: | |
1128 | of_node_put(timings_np); | |
1129 | put_display_node: | |
1130 | of_node_put(display_np); | |
1131 | return ret; | |
1132 | } | |
1133 | #else | |
1134 | static int atmel_lcdfb_of_init(struct atmel_lcdfb_info *sinfo) | |
1135 | { | |
1136 | return 0; | |
1137 | } | |
1138 | #endif | |
14340586 NF |
1139 | |
1140 | static int __init atmel_lcdfb_probe(struct platform_device *pdev) | |
1141 | { | |
1142 | struct device *dev = &pdev->dev; | |
1143 | struct fb_info *info; | |
1144 | struct atmel_lcdfb_info *sinfo; | |
b985172b | 1145 | struct atmel_lcdfb_pdata *pdata = NULL; |
14340586 NF |
1146 | struct resource *regs = NULL; |
1147 | struct resource *map = NULL; | |
b985172b | 1148 | struct fb_modelist *modelist; |
14340586 NF |
1149 | int ret; |
1150 | ||
1151 | dev_dbg(dev, "%s BEGIN\n", __func__); | |
1152 | ||
1153 | ret = -ENOMEM; | |
1154 | info = framebuffer_alloc(sizeof(struct atmel_lcdfb_info), dev); | |
1155 | if (!info) { | |
1156 | dev_err(dev, "cannot allocate memory\n"); | |
1157 | goto out; | |
1158 | } | |
1159 | ||
1160 | sinfo = info->par; | |
b985172b JCPV |
1161 | sinfo->pdev = pdev; |
1162 | sinfo->info = info; | |
1163 | ||
1164 | INIT_LIST_HEAD(&info->modelist); | |
1165 | ||
1166 | if (pdev->dev.of_node) { | |
1167 | ret = atmel_lcdfb_of_init(sinfo); | |
1168 | if (ret) | |
1169 | goto free_info; | |
1170 | } else if (dev_get_platdata(dev)) { | |
1171 | struct fb_monspecs *monspecs; | |
1172 | int i; | |
14340586 | 1173 | |
8af2c286 | 1174 | pdata = dev_get_platdata(dev); |
b985172b | 1175 | monspecs = pdata->default_monspecs; |
8af2c286 | 1176 | sinfo->pdata = *pdata; |
b985172b JCPV |
1177 | |
1178 | for (i = 0; i < monspecs->modedb_len; i++) | |
1179 | fb_add_videomode(&monspecs->modedb[i], &info->modelist); | |
1180 | ||
1181 | sinfo->config = atmel_lcdfb_get_config(pdev); | |
1182 | ||
1183 | info->var.bits_per_pixel = pdata->default_bpp ? pdata->default_bpp : 16; | |
1184 | memcpy(&info->monspecs, pdata->default_monspecs, sizeof(info->monspecs)); | |
14340586 NF |
1185 | } else { |
1186 | dev_err(dev, "cannot get default configuration\n"); | |
1187 | goto free_info; | |
1188 | } | |
b985172b | 1189 | |
bbd44f6b JH |
1190 | if (!sinfo->config) |
1191 | goto free_info; | |
14340586 NF |
1192 | |
1193 | strcpy(info->fix.id, sinfo->pdev->name); | |
1194 | info->flags = ATMEL_LCDFB_FBINFO_DEFAULT; | |
1195 | info->pseudo_palette = sinfo->pseudo_palette; | |
1196 | info->fbops = &atmel_lcdfb_ops; | |
1197 | ||
14340586 NF |
1198 | info->fix = atmel_lcdfb_fix; |
1199 | ||
1200 | /* Enable LCDC Clocks */ | |
557b7d5d JH |
1201 | sinfo->bus_clk = clk_get(dev, "hclk"); |
1202 | if (IS_ERR(sinfo->bus_clk)) { | |
1203 | ret = PTR_ERR(sinfo->bus_clk); | |
1204 | goto free_info; | |
14340586 NF |
1205 | } |
1206 | sinfo->lcdc_clk = clk_get(dev, "lcdc_clk"); | |
1207 | if (IS_ERR(sinfo->lcdc_clk)) { | |
1208 | ret = PTR_ERR(sinfo->lcdc_clk); | |
1209 | goto put_bus_clk; | |
1210 | } | |
1211 | atmel_lcdfb_start_clock(sinfo); | |
1212 | ||
b985172b JCPV |
1213 | modelist = list_first_entry(&info->modelist, |
1214 | struct fb_modelist, list); | |
1215 | fb_videomode_to_var(&info->var, &modelist->mode); | |
14340586 | 1216 | |
b985172b | 1217 | atmel_lcdfb_check_var(&info->var, info); |
14340586 NF |
1218 | |
1219 | regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1220 | if (!regs) { | |
1221 | dev_err(dev, "resources unusable\n"); | |
1222 | ret = -ENXIO; | |
1223 | goto stop_clk; | |
1224 | } | |
1225 | ||
1226 | sinfo->irq_base = platform_get_irq(pdev, 0); | |
1227 | if (sinfo->irq_base < 0) { | |
1228 | dev_err(dev, "unable to get irq\n"); | |
1229 | ret = sinfo->irq_base; | |
1230 | goto stop_clk; | |
1231 | } | |
1232 | ||
1233 | /* Initialize video memory */ | |
1234 | map = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
1235 | if (map) { | |
1236 | /* use a pre-allocated memory buffer */ | |
1237 | info->fix.smem_start = map->start; | |
28f65c11 | 1238 | info->fix.smem_len = resource_size(map); |
14340586 NF |
1239 | if (!request_mem_region(info->fix.smem_start, |
1240 | info->fix.smem_len, pdev->name)) { | |
1241 | ret = -EBUSY; | |
1242 | goto stop_clk; | |
1243 | } | |
1244 | ||
1245 | info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len); | |
130320bf PST |
1246 | if (!info->screen_base) { |
1247 | ret = -ENOMEM; | |
14340586 | 1248 | goto release_intmem; |
130320bf | 1249 | } |
01d3a5e7 HS |
1250 | |
1251 | /* | |
1252 | * Don't clear the framebuffer -- someone may have set | |
1253 | * up a splash image. | |
1254 | */ | |
14340586 | 1255 | } else { |
ff0c2642 | 1256 | /* allocate memory buffer */ |
14340586 NF |
1257 | ret = atmel_lcdfb_alloc_video_memory(sinfo); |
1258 | if (ret < 0) { | |
1259 | dev_err(dev, "cannot allocate framebuffer: %d\n", ret); | |
1260 | goto stop_clk; | |
1261 | } | |
1262 | } | |
1263 | ||
1264 | /* LCDC registers */ | |
1265 | info->fix.mmio_start = regs->start; | |
28f65c11 | 1266 | info->fix.mmio_len = resource_size(regs); |
14340586 NF |
1267 | |
1268 | if (!request_mem_region(info->fix.mmio_start, | |
1269 | info->fix.mmio_len, pdev->name)) { | |
1270 | ret = -EBUSY; | |
1271 | goto free_fb; | |
1272 | } | |
1273 | ||
1274 | sinfo->mmio = ioremap(info->fix.mmio_start, info->fix.mmio_len); | |
1275 | if (!sinfo->mmio) { | |
1276 | dev_err(dev, "cannot map LCDC registers\n"); | |
130320bf | 1277 | ret = -ENOMEM; |
14340586 NF |
1278 | goto release_mem; |
1279 | } | |
1280 | ||
a9a84c37 DB |
1281 | /* Initialize PWM for contrast or backlight ("off") */ |
1282 | init_contrast(sinfo); | |
1283 | ||
14340586 NF |
1284 | /* interrupt */ |
1285 | ret = request_irq(sinfo->irq_base, atmel_lcdfb_interrupt, 0, pdev->name, info); | |
1286 | if (ret) { | |
1287 | dev_err(dev, "request_irq failed: %d\n", ret); | |
1288 | goto unmap_mmio; | |
1289 | } | |
1290 | ||
d22579b8 NF |
1291 | /* Some operations on the LCDC might sleep and |
1292 | * require a preemptible task context */ | |
1293 | INIT_WORK(&sinfo->task, atmel_lcdfb_task); | |
1294 | ||
14340586 NF |
1295 | ret = atmel_lcdfb_init_fbinfo(sinfo); |
1296 | if (ret < 0) { | |
1297 | dev_err(dev, "init fbinfo failed: %d\n", ret); | |
1298 | goto unregister_irqs; | |
1299 | } | |
1300 | ||
14340586 NF |
1301 | dev_set_drvdata(dev, info); |
1302 | ||
1303 | /* | |
1304 | * Tell the world that we're ready to go | |
1305 | */ | |
1306 | ret = register_framebuffer(info); | |
1307 | if (ret < 0) { | |
1308 | dev_err(dev, "failed to register framebuffer device: %d\n", ret); | |
b985172b | 1309 | goto reset_drvdata; |
14340586 NF |
1310 | } |
1311 | ||
1312 | /* Power up the LCDC screen */ | |
42110e91 | 1313 | atmel_lcdfb_power_control(sinfo, 1); |
14340586 | 1314 | |
93f6ced9 | 1315 | dev_info(dev, "fb%d: Atmel LCDC at 0x%08lx (mapped at %p), irq %d\n", |
14340586 NF |
1316 | info->node, info->fix.mmio_start, sinfo->mmio, sinfo->irq_base); |
1317 | ||
1318 | return 0; | |
1319 | ||
b985172b JCPV |
1320 | reset_drvdata: |
1321 | dev_set_drvdata(dev, NULL); | |
14340586 NF |
1322 | fb_dealloc_cmap(&info->cmap); |
1323 | unregister_irqs: | |
d22579b8 | 1324 | cancel_work_sync(&sinfo->task); |
14340586 NF |
1325 | free_irq(sinfo->irq_base, info); |
1326 | unmap_mmio: | |
a9a84c37 | 1327 | exit_backlight(sinfo); |
14340586 NF |
1328 | iounmap(sinfo->mmio); |
1329 | release_mem: | |
1330 | release_mem_region(info->fix.mmio_start, info->fix.mmio_len); | |
1331 | free_fb: | |
1332 | if (map) | |
1333 | iounmap(info->screen_base); | |
1334 | else | |
1335 | atmel_lcdfb_free_video_memory(sinfo); | |
1336 | ||
1337 | release_intmem: | |
1338 | if (map) | |
1339 | release_mem_region(info->fix.smem_start, info->fix.smem_len); | |
1340 | stop_clk: | |
1341 | atmel_lcdfb_stop_clock(sinfo); | |
1342 | clk_put(sinfo->lcdc_clk); | |
1343 | put_bus_clk: | |
557b7d5d | 1344 | clk_put(sinfo->bus_clk); |
14340586 NF |
1345 | free_info: |
1346 | framebuffer_release(info); | |
1347 | out: | |
1348 | dev_dbg(dev, "%s FAILED\n", __func__); | |
1349 | return ret; | |
1350 | } | |
1351 | ||
1352 | static int __exit atmel_lcdfb_remove(struct platform_device *pdev) | |
1353 | { | |
1354 | struct device *dev = &pdev->dev; | |
1355 | struct fb_info *info = dev_get_drvdata(dev); | |
34a35bdd | 1356 | struct atmel_lcdfb_info *sinfo; |
8af2c286 | 1357 | struct atmel_lcdfb_pdata *pdata; |
14340586 | 1358 | |
34a35bdd | 1359 | if (!info || !info->par) |
14340586 | 1360 | return 0; |
34a35bdd | 1361 | sinfo = info->par; |
8af2c286 | 1362 | pdata = &sinfo->pdata; |
14340586 | 1363 | |
d22579b8 | 1364 | cancel_work_sync(&sinfo->task); |
a9a84c37 | 1365 | exit_backlight(sinfo); |
42110e91 | 1366 | atmel_lcdfb_power_control(sinfo, 0); |
14340586 NF |
1367 | unregister_framebuffer(info); |
1368 | atmel_lcdfb_stop_clock(sinfo); | |
1369 | clk_put(sinfo->lcdc_clk); | |
557b7d5d | 1370 | clk_put(sinfo->bus_clk); |
14340586 NF |
1371 | fb_dealloc_cmap(&info->cmap); |
1372 | free_irq(sinfo->irq_base, info); | |
1373 | iounmap(sinfo->mmio); | |
1374 | release_mem_region(info->fix.mmio_start, info->fix.mmio_len); | |
1375 | if (platform_get_resource(pdev, IORESOURCE_MEM, 1)) { | |
1376 | iounmap(info->screen_base); | |
1377 | release_mem_region(info->fix.smem_start, info->fix.smem_len); | |
1378 | } else { | |
1379 | atmel_lcdfb_free_video_memory(sinfo); | |
1380 | } | |
1381 | ||
14340586 NF |
1382 | framebuffer_release(info); |
1383 | ||
1384 | return 0; | |
1385 | } | |
1386 | ||
cf19a37e DB |
1387 | #ifdef CONFIG_PM |
1388 | ||
1389 | static int atmel_lcdfb_suspend(struct platform_device *pdev, pm_message_t mesg) | |
1390 | { | |
1391 | struct fb_info *info = platform_get_drvdata(pdev); | |
1392 | struct atmel_lcdfb_info *sinfo = info->par; | |
1393 | ||
3aa04f1b HS |
1394 | /* |
1395 | * We don't want to handle interrupts while the clock is | |
1396 | * stopped. It may take forever. | |
1397 | */ | |
1398 | lcdc_writel(sinfo, ATMEL_LCDC_IDR, ~0UL); | |
1399 | ||
9f106503 | 1400 | sinfo->saved_lcdcon = lcdc_readl(sinfo, ATMEL_LCDC_CONTRAST_CTR); |
cf19a37e | 1401 | lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, 0); |
42110e91 | 1402 | atmel_lcdfb_power_control(sinfo, 0); |
3aa04f1b | 1403 | atmel_lcdfb_stop(sinfo); |
cf19a37e | 1404 | atmel_lcdfb_stop_clock(sinfo); |
3aa04f1b | 1405 | |
cf19a37e DB |
1406 | return 0; |
1407 | } | |
1408 | ||
1409 | static int atmel_lcdfb_resume(struct platform_device *pdev) | |
1410 | { | |
1411 | struct fb_info *info = platform_get_drvdata(pdev); | |
1412 | struct atmel_lcdfb_info *sinfo = info->par; | |
1413 | ||
1414 | atmel_lcdfb_start_clock(sinfo); | |
3aa04f1b | 1415 | atmel_lcdfb_start(sinfo); |
42110e91 | 1416 | atmel_lcdfb_power_control(sinfo, 1); |
cf19a37e | 1417 | lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, sinfo->saved_lcdcon); |
3aa04f1b HS |
1418 | |
1419 | /* Enable FIFO & DMA errors */ | |
1420 | lcdc_writel(sinfo, ATMEL_LCDC_IER, ATMEL_LCDC_UFLWI | |
1421 | | ATMEL_LCDC_OWRI | ATMEL_LCDC_MERI); | |
1422 | ||
cf19a37e DB |
1423 | return 0; |
1424 | } | |
1425 | ||
1426 | #else | |
1427 | #define atmel_lcdfb_suspend NULL | |
1428 | #define atmel_lcdfb_resume NULL | |
1429 | #endif | |
1430 | ||
14340586 NF |
1431 | static struct platform_driver atmel_lcdfb_driver = { |
1432 | .remove = __exit_p(atmel_lcdfb_remove), | |
cf19a37e DB |
1433 | .suspend = atmel_lcdfb_suspend, |
1434 | .resume = atmel_lcdfb_resume, | |
bbd44f6b | 1435 | .id_table = atmel_lcdfb_devtypes, |
14340586 NF |
1436 | .driver = { |
1437 | .name = "atmel_lcdfb", | |
1438 | .owner = THIS_MODULE, | |
b985172b | 1439 | .of_match_table = of_match_ptr(atmel_lcdfb_dt_ids), |
14340586 NF |
1440 | }, |
1441 | }; | |
1442 | ||
3ccbf89f | 1443 | module_platform_driver_probe(atmel_lcdfb_driver, atmel_lcdfb_probe); |
14340586 NF |
1444 | |
1445 | MODULE_DESCRIPTION("AT91/AT32 LCD Controller framebuffer driver"); | |
8f4c79ce | 1446 | MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>"); |
14340586 | 1447 | MODULE_LICENSE("GPL"); |