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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> |
14340586 | 22 | |
a09e64fb RK |
23 | #include <mach/board.h> |
24 | #include <mach/cpu.h> | |
60e8972d | 25 | #include <asm/gpio.h> |
14340586 NF |
26 | |
27 | #include <video/atmel_lcdc.h> | |
28 | ||
29 | #define lcdc_readl(sinfo, reg) __raw_readl((sinfo)->mmio+(reg)) | |
30 | #define lcdc_writel(sinfo, reg, val) __raw_writel((val), (sinfo)->mmio+(reg)) | |
31 | ||
32 | /* configurable parameters */ | |
33 | #define ATMEL_LCDC_CVAL_DEFAULT 0xc8 | |
53b7479b NF |
34 | #define ATMEL_LCDC_DMA_BURST_LEN 8 /* words */ |
35 | #define ATMEL_LCDC_FIFO_SIZE 512 /* words */ | |
14340586 NF |
36 | |
37 | #if defined(CONFIG_ARCH_AT91) | |
e730d8b0 HS |
38 | #define ATMEL_LCDFB_FBINFO_DEFAULT (FBINFO_DEFAULT \ |
39 | | FBINFO_PARTIAL_PAN_OK \ | |
40 | | FBINFO_HWACCEL_YPAN) | |
14340586 NF |
41 | |
42 | static inline void atmel_lcdfb_update_dma2d(struct atmel_lcdfb_info *sinfo, | |
b3e9c129 LP |
43 | struct fb_var_screeninfo *var, |
44 | struct fb_info *info) | |
14340586 NF |
45 | { |
46 | ||
47 | } | |
48 | #elif defined(CONFIG_AVR32) | |
49 | #define ATMEL_LCDFB_FBINFO_DEFAULT (FBINFO_DEFAULT \ | |
50 | | FBINFO_PARTIAL_PAN_OK \ | |
51 | | FBINFO_HWACCEL_XPAN \ | |
52 | | FBINFO_HWACCEL_YPAN) | |
53 | ||
54 | static void atmel_lcdfb_update_dma2d(struct atmel_lcdfb_info *sinfo, | |
b3e9c129 LP |
55 | struct fb_var_screeninfo *var, |
56 | struct fb_info *info) | |
14340586 NF |
57 | { |
58 | u32 dma2dcfg; | |
59 | u32 pixeloff; | |
60 | ||
b3e9c129 | 61 | pixeloff = (var->xoffset * info->var.bits_per_pixel) & 0x1f; |
14340586 | 62 | |
b3e9c129 LP |
63 | dma2dcfg = (info->var.xres_virtual - info->var.xres) |
64 | * info->var.bits_per_pixel / 8; | |
14340586 NF |
65 | dma2dcfg |= pixeloff << ATMEL_LCDC_PIXELOFF_OFFSET; |
66 | lcdc_writel(sinfo, ATMEL_LCDC_DMA2DCFG, dma2dcfg); | |
67 | ||
68 | /* Update configuration */ | |
69 | lcdc_writel(sinfo, ATMEL_LCDC_DMACON, | |
70 | lcdc_readl(sinfo, ATMEL_LCDC_DMACON) | |
71 | | ATMEL_LCDC_DMAUPDT); | |
72 | } | |
73 | #endif | |
74 | ||
7cdcdb69 | 75 | static u32 contrast_ctr = ATMEL_LCDC_PS_DIV8 |
a9a84c37 DB |
76 | | ATMEL_LCDC_POL_POSITIVE |
77 | | ATMEL_LCDC_ENA_PWMENABLE; | |
78 | ||
79 | #ifdef CONFIG_BACKLIGHT_ATMEL_LCDC | |
80 | ||
81 | /* some bl->props field just changed */ | |
82 | static int atmel_bl_update_status(struct backlight_device *bl) | |
83 | { | |
84 | struct atmel_lcdfb_info *sinfo = bl_get_data(bl); | |
85 | int power = sinfo->bl_power; | |
86 | int brightness = bl->props.brightness; | |
87 | ||
88 | /* REVISIT there may be a meaningful difference between | |
89 | * fb_blank and power ... there seem to be some cases | |
90 | * this doesn't handle correctly. | |
91 | */ | |
92 | if (bl->props.fb_blank != sinfo->bl_power) | |
93 | power = bl->props.fb_blank; | |
94 | else if (bl->props.power != sinfo->bl_power) | |
95 | power = bl->props.power; | |
96 | ||
97 | if (brightness < 0 && power == FB_BLANK_UNBLANK) | |
98 | brightness = lcdc_readl(sinfo, ATMEL_LCDC_CONTRAST_VAL); | |
99 | else if (power != FB_BLANK_UNBLANK) | |
100 | brightness = 0; | |
101 | ||
102 | lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_VAL, brightness); | |
103 | lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, | |
104 | brightness ? contrast_ctr : 0); | |
105 | ||
106 | bl->props.fb_blank = bl->props.power = sinfo->bl_power = power; | |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
111 | static int atmel_bl_get_brightness(struct backlight_device *bl) | |
112 | { | |
113 | struct atmel_lcdfb_info *sinfo = bl_get_data(bl); | |
114 | ||
115 | return lcdc_readl(sinfo, ATMEL_LCDC_CONTRAST_VAL); | |
116 | } | |
117 | ||
acc2472e | 118 | static const struct backlight_ops atmel_lcdc_bl_ops = { |
a9a84c37 DB |
119 | .update_status = atmel_bl_update_status, |
120 | .get_brightness = atmel_bl_get_brightness, | |
121 | }; | |
122 | ||
123 | static void init_backlight(struct atmel_lcdfb_info *sinfo) | |
124 | { | |
a19a6ee6 | 125 | struct backlight_properties props; |
a9a84c37 DB |
126 | struct backlight_device *bl; |
127 | ||
128 | sinfo->bl_power = FB_BLANK_UNBLANK; | |
129 | ||
130 | if (sinfo->backlight) | |
131 | return; | |
132 | ||
a19a6ee6 | 133 | memset(&props, 0, sizeof(struct backlight_properties)); |
bb7ca747 | 134 | props.type = BACKLIGHT_RAW; |
a19a6ee6 MG |
135 | props.max_brightness = 0xff; |
136 | bl = backlight_device_register("backlight", &sinfo->pdev->dev, sinfo, | |
137 | &atmel_lcdc_bl_ops, &props); | |
cf7b9a1e | 138 | if (IS_ERR(bl)) { |
a9a84c37 DB |
139 | dev_err(&sinfo->pdev->dev, "error %ld on backlight register\n", |
140 | PTR_ERR(bl)); | |
141 | return; | |
142 | } | |
143 | sinfo->backlight = bl; | |
144 | ||
145 | bl->props.power = FB_BLANK_UNBLANK; | |
146 | bl->props.fb_blank = FB_BLANK_UNBLANK; | |
a9a84c37 DB |
147 | bl->props.brightness = atmel_bl_get_brightness(bl); |
148 | } | |
149 | ||
150 | static void exit_backlight(struct atmel_lcdfb_info *sinfo) | |
151 | { | |
152 | if (sinfo->backlight) | |
153 | backlight_device_unregister(sinfo->backlight); | |
154 | } | |
155 | ||
156 | #else | |
157 | ||
158 | static void init_backlight(struct atmel_lcdfb_info *sinfo) | |
159 | { | |
160 | dev_warn(&sinfo->pdev->dev, "backlight control is not available\n"); | |
161 | } | |
162 | ||
163 | static void exit_backlight(struct atmel_lcdfb_info *sinfo) | |
164 | { | |
165 | } | |
166 | ||
167 | #endif | |
168 | ||
169 | static void init_contrast(struct atmel_lcdfb_info *sinfo) | |
170 | { | |
7cdcdb69 AB |
171 | /* contrast pwm can be 'inverted' */ |
172 | if (sinfo->lcdcon_pol_negative) | |
173 | contrast_ctr &= ~(ATMEL_LCDC_POL_POSITIVE); | |
174 | ||
a9a84c37 DB |
175 | /* have some default contrast/backlight settings */ |
176 | lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, contrast_ctr); | |
177 | lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_VAL, ATMEL_LCDC_CVAL_DEFAULT); | |
178 | ||
179 | if (sinfo->lcdcon_is_backlight) | |
180 | init_backlight(sinfo); | |
181 | } | |
182 | ||
14340586 NF |
183 | |
184 | static struct fb_fix_screeninfo atmel_lcdfb_fix __initdata = { | |
185 | .type = FB_TYPE_PACKED_PIXELS, | |
186 | .visual = FB_VISUAL_TRUECOLOR, | |
187 | .xpanstep = 0, | |
e730d8b0 | 188 | .ypanstep = 1, |
14340586 NF |
189 | .ywrapstep = 0, |
190 | .accel = FB_ACCEL_NONE, | |
191 | }; | |
192 | ||
250a269d NF |
193 | static unsigned long compute_hozval(unsigned long xres, unsigned long lcdcon2) |
194 | { | |
195 | unsigned long value; | |
196 | ||
915190f7 NF |
197 | if (!(cpu_is_at91sam9261() || cpu_is_at91sam9g10() |
198 | || cpu_is_at32ap7000())) | |
250a269d NF |
199 | return xres; |
200 | ||
201 | value = xres; | |
202 | if ((lcdcon2 & ATMEL_LCDC_DISTYPE) != ATMEL_LCDC_DISTYPE_TFT) { | |
203 | /* STN display */ | |
204 | if ((lcdcon2 & ATMEL_LCDC_DISTYPE) == ATMEL_LCDC_DISTYPE_STNCOLOR) { | |
205 | value *= 3; | |
206 | } | |
207 | if ( (lcdcon2 & ATMEL_LCDC_IFWIDTH) == ATMEL_LCDC_IFWIDTH_4 | |
208 | || ( (lcdcon2 & ATMEL_LCDC_IFWIDTH) == ATMEL_LCDC_IFWIDTH_8 | |
209 | && (lcdcon2 & ATMEL_LCDC_SCANMOD) == ATMEL_LCDC_SCANMOD_DUAL )) | |
210 | value = DIV_ROUND_UP(value, 4); | |
211 | else | |
212 | value = DIV_ROUND_UP(value, 8); | |
213 | } | |
214 | ||
215 | return value; | |
216 | } | |
14340586 | 217 | |
3aa04f1b HS |
218 | static void atmel_lcdfb_stop_nowait(struct atmel_lcdfb_info *sinfo) |
219 | { | |
220 | /* Turn off the LCD controller and the DMA controller */ | |
221 | lcdc_writel(sinfo, ATMEL_LCDC_PWRCON, | |
222 | sinfo->guard_time << ATMEL_LCDC_GUARDT_OFFSET); | |
223 | ||
224 | /* Wait for the LCDC core to become idle */ | |
225 | while (lcdc_readl(sinfo, ATMEL_LCDC_PWRCON) & ATMEL_LCDC_BUSY) | |
226 | msleep(10); | |
227 | ||
228 | lcdc_writel(sinfo, ATMEL_LCDC_DMACON, 0); | |
229 | } | |
230 | ||
231 | static void atmel_lcdfb_stop(struct atmel_lcdfb_info *sinfo) | |
232 | { | |
233 | atmel_lcdfb_stop_nowait(sinfo); | |
234 | ||
235 | /* Wait for DMA engine to become idle... */ | |
236 | while (lcdc_readl(sinfo, ATMEL_LCDC_DMACON) & ATMEL_LCDC_DMABUSY) | |
237 | msleep(10); | |
238 | } | |
239 | ||
240 | static void atmel_lcdfb_start(struct atmel_lcdfb_info *sinfo) | |
241 | { | |
242 | lcdc_writel(sinfo, ATMEL_LCDC_DMACON, sinfo->default_dmacon); | |
243 | lcdc_writel(sinfo, ATMEL_LCDC_PWRCON, | |
244 | (sinfo->guard_time << ATMEL_LCDC_GUARDT_OFFSET) | |
245 | | ATMEL_LCDC_PWR); | |
246 | } | |
247 | ||
14340586 NF |
248 | static void atmel_lcdfb_update_dma(struct fb_info *info, |
249 | struct fb_var_screeninfo *var) | |
250 | { | |
251 | struct atmel_lcdfb_info *sinfo = info->par; | |
252 | struct fb_fix_screeninfo *fix = &info->fix; | |
253 | unsigned long dma_addr; | |
254 | ||
255 | dma_addr = (fix->smem_start + var->yoffset * fix->line_length | |
b3e9c129 | 256 | + var->xoffset * info->var.bits_per_pixel / 8); |
14340586 NF |
257 | |
258 | dma_addr &= ~3UL; | |
259 | ||
260 | /* Set framebuffer DMA base address and pixel offset */ | |
261 | lcdc_writel(sinfo, ATMEL_LCDC_DMABADDR1, dma_addr); | |
262 | ||
b3e9c129 | 263 | atmel_lcdfb_update_dma2d(sinfo, var, info); |
14340586 NF |
264 | } |
265 | ||
266 | static inline void atmel_lcdfb_free_video_memory(struct atmel_lcdfb_info *sinfo) | |
267 | { | |
268 | struct fb_info *info = sinfo->info; | |
269 | ||
270 | dma_free_writecombine(info->device, info->fix.smem_len, | |
271 | info->screen_base, info->fix.smem_start); | |
272 | } | |
273 | ||
274 | /** | |
275 | * atmel_lcdfb_alloc_video_memory - Allocate framebuffer memory | |
276 | * @sinfo: the frame buffer to allocate memory for | |
1d01e835 KH |
277 | * |
278 | * This function is called only from the atmel_lcdfb_probe() | |
279 | * so no locking by fb_info->mm_lock around smem_len setting is needed. | |
14340586 NF |
280 | */ |
281 | static int atmel_lcdfb_alloc_video_memory(struct atmel_lcdfb_info *sinfo) | |
282 | { | |
283 | struct fb_info *info = sinfo->info; | |
284 | struct fb_var_screeninfo *var = &info->var; | |
ea757aca | 285 | unsigned int smem_len; |
14340586 | 286 | |
ea757aca HS |
287 | smem_len = (var->xres_virtual * var->yres_virtual |
288 | * ((var->bits_per_pixel + 7) / 8)); | |
289 | info->fix.smem_len = max(smem_len, sinfo->smem_len); | |
14340586 NF |
290 | |
291 | info->screen_base = dma_alloc_writecombine(info->device, info->fix.smem_len, | |
292 | (dma_addr_t *)&info->fix.smem_start, GFP_KERNEL); | |
293 | ||
294 | if (!info->screen_base) { | |
295 | return -ENOMEM; | |
296 | } | |
297 | ||
01d3a5e7 HS |
298 | memset(info->screen_base, 0, info->fix.smem_len); |
299 | ||
14340586 NF |
300 | return 0; |
301 | } | |
302 | ||
968910bd NF |
303 | static const struct fb_videomode *atmel_lcdfb_choose_mode(struct fb_var_screeninfo *var, |
304 | struct fb_info *info) | |
305 | { | |
306 | struct fb_videomode varfbmode; | |
307 | const struct fb_videomode *fbmode = NULL; | |
308 | ||
309 | fb_var_to_videomode(&varfbmode, var); | |
310 | fbmode = fb_find_nearest_mode(&varfbmode, &info->modelist); | |
311 | if (fbmode) | |
312 | fb_videomode_to_var(var, fbmode); | |
313 | return fbmode; | |
314 | } | |
315 | ||
316 | ||
14340586 NF |
317 | /** |
318 | * atmel_lcdfb_check_var - Validates a var passed in. | |
319 | * @var: frame buffer variable screen structure | |
320 | * @info: frame buffer structure that represents a single frame buffer | |
321 | * | |
322 | * Checks to see if the hardware supports the state requested by | |
323 | * var passed in. This function does not alter the hardware | |
324 | * state!!! This means the data stored in struct fb_info and | |
325 | * struct atmel_lcdfb_info do not change. This includes the var | |
326 | * inside of struct fb_info. Do NOT change these. This function | |
327 | * can be called on its own if we intent to only test a mode and | |
328 | * not actually set it. The stuff in modedb.c is a example of | |
329 | * this. If the var passed in is slightly off by what the | |
330 | * hardware can support then we alter the var PASSED in to what | |
331 | * we can do. If the hardware doesn't support mode change a | |
332 | * -EINVAL will be returned by the upper layers. You don't need | |
333 | * to implement this function then. If you hardware doesn't | |
334 | * support changing the resolution then this function is not | |
335 | * needed. In this case the driver would just provide a var that | |
336 | * represents the static state the screen is in. | |
337 | * | |
338 | * Returns negative errno on error, or zero on success. | |
339 | */ | |
340 | static int atmel_lcdfb_check_var(struct fb_var_screeninfo *var, | |
341 | struct fb_info *info) | |
342 | { | |
343 | struct device *dev = info->device; | |
344 | struct atmel_lcdfb_info *sinfo = info->par; | |
345 | unsigned long clk_value_khz; | |
346 | ||
347 | clk_value_khz = clk_get_rate(sinfo->lcdc_clk) / 1000; | |
348 | ||
349 | dev_dbg(dev, "%s:\n", __func__); | |
968910bd NF |
350 | |
351 | if (!(var->pixclock && var->bits_per_pixel)) { | |
352 | /* choose a suitable mode if possible */ | |
353 | if (!atmel_lcdfb_choose_mode(var, info)) { | |
354 | dev_err(dev, "needed value not specified\n"); | |
355 | return -EINVAL; | |
356 | } | |
357 | } | |
358 | ||
14340586 NF |
359 | dev_dbg(dev, " resolution: %ux%u\n", var->xres, var->yres); |
360 | dev_dbg(dev, " pixclk: %lu KHz\n", PICOS2KHZ(var->pixclock)); | |
361 | dev_dbg(dev, " bpp: %u\n", var->bits_per_pixel); | |
362 | dev_dbg(dev, " clk: %lu KHz\n", clk_value_khz); | |
363 | ||
97b9a5a2 | 364 | if (PICOS2KHZ(var->pixclock) > clk_value_khz) { |
14340586 NF |
365 | dev_err(dev, "%lu KHz pixel clock is too fast\n", PICOS2KHZ(var->pixclock)); |
366 | return -EINVAL; | |
367 | } | |
368 | ||
968910bd NF |
369 | /* Do not allow to have real resoulution larger than virtual */ |
370 | if (var->xres > var->xres_virtual) | |
371 | var->xres_virtual = var->xres; | |
372 | ||
373 | if (var->yres > var->yres_virtual) | |
374 | var->yres_virtual = var->yres; | |
375 | ||
14340586 NF |
376 | /* Force same alignment for each line */ |
377 | var->xres = (var->xres + 3) & ~3UL; | |
378 | var->xres_virtual = (var->xres_virtual + 3) & ~3UL; | |
379 | ||
380 | var->red.msb_right = var->green.msb_right = var->blue.msb_right = 0; | |
381 | var->transp.msb_right = 0; | |
382 | var->transp.offset = var->transp.length = 0; | |
383 | var->xoffset = var->yoffset = 0; | |
384 | ||
f928ac0a SG |
385 | if (info->fix.smem_len) { |
386 | unsigned int smem_len = (var->xres_virtual * var->yres_virtual | |
387 | * ((var->bits_per_pixel + 7) / 8)); | |
388 | if (smem_len > info->fix.smem_len) | |
389 | return -EINVAL; | |
390 | } | |
391 | ||
162b3a08 HS |
392 | /* Saturate vertical and horizontal timings at maximum values */ |
393 | var->vsync_len = min_t(u32, var->vsync_len, | |
394 | (ATMEL_LCDC_VPW >> ATMEL_LCDC_VPW_OFFSET) + 1); | |
395 | var->upper_margin = min_t(u32, var->upper_margin, | |
396 | ATMEL_LCDC_VBP >> ATMEL_LCDC_VBP_OFFSET); | |
397 | var->lower_margin = min_t(u32, var->lower_margin, | |
398 | ATMEL_LCDC_VFP); | |
399 | var->right_margin = min_t(u32, var->right_margin, | |
400 | (ATMEL_LCDC_HFP >> ATMEL_LCDC_HFP_OFFSET) + 1); | |
401 | var->hsync_len = min_t(u32, var->hsync_len, | |
402 | (ATMEL_LCDC_HPW >> ATMEL_LCDC_HPW_OFFSET) + 1); | |
403 | var->left_margin = min_t(u32, var->left_margin, | |
404 | ATMEL_LCDC_HBP + 1); | |
405 | ||
406 | /* Some parameters can't be zero */ | |
407 | var->vsync_len = max_t(u32, var->vsync_len, 1); | |
408 | var->right_margin = max_t(u32, var->right_margin, 1); | |
409 | var->hsync_len = max_t(u32, var->hsync_len, 1); | |
410 | var->left_margin = max_t(u32, var->left_margin, 1); | |
411 | ||
14340586 | 412 | switch (var->bits_per_pixel) { |
250a269d | 413 | case 1: |
14340586 NF |
414 | case 2: |
415 | case 4: | |
416 | case 8: | |
417 | var->red.offset = var->green.offset = var->blue.offset = 0; | |
418 | var->red.length = var->green.length = var->blue.length | |
419 | = var->bits_per_pixel; | |
420 | break; | |
421 | case 15: | |
422 | case 16: | |
fd085801 NF |
423 | if (sinfo->lcd_wiring_mode == ATMEL_LCDC_WIRING_RGB) { |
424 | /* RGB:565 mode */ | |
425 | var->red.offset = 11; | |
426 | var->blue.offset = 0; | |
427 | var->green.length = 6; | |
fbd03a1c GG |
428 | } else if (sinfo->lcd_wiring_mode == ATMEL_LCDC_WIRING_RGB555) { |
429 | var->red.offset = 10; | |
430 | var->blue.offset = 0; | |
431 | var->green.length = 5; | |
fd085801 NF |
432 | } else { |
433 | /* BGR:555 mode */ | |
434 | var->red.offset = 0; | |
435 | var->blue.offset = 10; | |
436 | var->green.length = 5; | |
437 | } | |
14340586 | 438 | var->green.offset = 5; |
fd085801 | 439 | var->red.length = var->blue.length = 5; |
14340586 | 440 | break; |
14340586 | 441 | case 32: |
4440e0e1 HS |
442 | var->transp.offset = 24; |
443 | var->transp.length = 8; | |
444 | /* fall through */ | |
445 | case 24: | |
fd085801 NF |
446 | if (sinfo->lcd_wiring_mode == ATMEL_LCDC_WIRING_RGB) { |
447 | /* RGB:888 mode */ | |
448 | var->red.offset = 16; | |
449 | var->blue.offset = 0; | |
450 | } else { | |
451 | /* BGR:888 mode */ | |
452 | var->red.offset = 0; | |
453 | var->blue.offset = 16; | |
454 | } | |
14340586 | 455 | var->green.offset = 8; |
14340586 NF |
456 | var->red.length = var->green.length = var->blue.length = 8; |
457 | break; | |
458 | default: | |
459 | dev_err(dev, "color depth %d not supported\n", | |
460 | var->bits_per_pixel); | |
461 | return -EINVAL; | |
462 | } | |
463 | ||
464 | return 0; | |
465 | } | |
466 | ||
d22579b8 NF |
467 | /* |
468 | * LCD reset sequence | |
469 | */ | |
470 | static void atmel_lcdfb_reset(struct atmel_lcdfb_info *sinfo) | |
471 | { | |
472 | might_sleep(); | |
473 | ||
3aa04f1b HS |
474 | atmel_lcdfb_stop(sinfo); |
475 | atmel_lcdfb_start(sinfo); | |
d22579b8 NF |
476 | } |
477 | ||
14340586 NF |
478 | /** |
479 | * atmel_lcdfb_set_par - Alters the hardware state. | |
480 | * @info: frame buffer structure that represents a single frame buffer | |
481 | * | |
482 | * Using the fb_var_screeninfo in fb_info we set the resolution | |
483 | * of the this particular framebuffer. This function alters the | |
484 | * par AND the fb_fix_screeninfo stored in fb_info. It doesn't | |
485 | * not alter var in fb_info since we are using that data. This | |
486 | * means we depend on the data in var inside fb_info to be | |
487 | * supported by the hardware. atmel_lcdfb_check_var is always called | |
488 | * before atmel_lcdfb_set_par to ensure this. Again if you can't | |
489 | * change the resolution you don't need this function. | |
490 | * | |
491 | */ | |
492 | static int atmel_lcdfb_set_par(struct fb_info *info) | |
493 | { | |
494 | struct atmel_lcdfb_info *sinfo = info->par; | |
250a269d | 495 | unsigned long hozval_linesz; |
14340586 NF |
496 | unsigned long value; |
497 | unsigned long clk_value_khz; | |
250a269d | 498 | unsigned long bits_per_line; |
431861cf | 499 | unsigned long pix_factor = 2; |
14340586 | 500 | |
d22579b8 NF |
501 | might_sleep(); |
502 | ||
14340586 NF |
503 | dev_dbg(info->device, "%s:\n", __func__); |
504 | dev_dbg(info->device, " * resolution: %ux%u (%ux%u virtual)\n", | |
505 | info->var.xres, info->var.yres, | |
506 | info->var.xres_virtual, info->var.yres_virtual); | |
507 | ||
3aa04f1b | 508 | atmel_lcdfb_stop_nowait(sinfo); |
14340586 | 509 | |
250a269d NF |
510 | if (info->var.bits_per_pixel == 1) |
511 | info->fix.visual = FB_VISUAL_MONO01; | |
512 | else if (info->var.bits_per_pixel <= 8) | |
14340586 NF |
513 | info->fix.visual = FB_VISUAL_PSEUDOCOLOR; |
514 | else | |
515 | info->fix.visual = FB_VISUAL_TRUECOLOR; | |
516 | ||
250a269d NF |
517 | bits_per_line = info->var.xres_virtual * info->var.bits_per_pixel; |
518 | info->fix.line_length = DIV_ROUND_UP(bits_per_line, 8); | |
14340586 NF |
519 | |
520 | /* Re-initialize the DMA engine... */ | |
521 | dev_dbg(info->device, " * update DMA engine\n"); | |
522 | atmel_lcdfb_update_dma(info, &info->var); | |
523 | ||
524 | /* ...set frame size and burst length = 8 words (?) */ | |
525 | value = (info->var.yres * info->var.xres * info->var.bits_per_pixel) / 32; | |
526 | value |= ((ATMEL_LCDC_DMA_BURST_LEN - 1) << ATMEL_LCDC_BLENGTH_OFFSET); | |
527 | lcdc_writel(sinfo, ATMEL_LCDC_DMAFRMCFG, value); | |
528 | ||
529 | /* Now, the LCDC core... */ | |
530 | ||
531 | /* Set pixel clock */ | |
431861cf NF |
532 | if (cpu_is_at91sam9g45() && !cpu_is_at91sam9g45es()) |
533 | pix_factor = 1; | |
534 | ||
14340586 NF |
535 | clk_value_khz = clk_get_rate(sinfo->lcdc_clk) / 1000; |
536 | ||
250a269d | 537 | value = DIV_ROUND_UP(clk_value_khz, PICOS2KHZ(info->var.pixclock)); |
14340586 | 538 | |
431861cf | 539 | if (value < pix_factor) { |
14340586 NF |
540 | dev_notice(info->device, "Bypassing pixel clock divider\n"); |
541 | lcdc_writel(sinfo, ATMEL_LCDC_LCDCON1, ATMEL_LCDC_BYPASS); | |
250a269d | 542 | } else { |
431861cf | 543 | value = (value / pix_factor) - 1; |
baf6332a NF |
544 | dev_dbg(info->device, " * programming CLKVAL = 0x%08lx\n", |
545 | value); | |
546 | lcdc_writel(sinfo, ATMEL_LCDC_LCDCON1, | |
547 | value << ATMEL_LCDC_CLKVAL_OFFSET); | |
431861cf NF |
548 | info->var.pixclock = |
549 | KHZ2PICOS(clk_value_khz / (pix_factor * (value + 1))); | |
250a269d NF |
550 | dev_dbg(info->device, " updated pixclk: %lu KHz\n", |
551 | PICOS2KHZ(info->var.pixclock)); | |
552 | } | |
553 | ||
14340586 NF |
554 | |
555 | /* Initialize control register 2 */ | |
556 | value = sinfo->default_lcdcon2; | |
557 | ||
558 | if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT)) | |
559 | value |= ATMEL_LCDC_INVLINE_INVERTED; | |
560 | if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT)) | |
561 | value |= ATMEL_LCDC_INVFRAME_INVERTED; | |
562 | ||
563 | switch (info->var.bits_per_pixel) { | |
564 | case 1: value |= ATMEL_LCDC_PIXELSIZE_1; break; | |
565 | case 2: value |= ATMEL_LCDC_PIXELSIZE_2; break; | |
566 | case 4: value |= ATMEL_LCDC_PIXELSIZE_4; break; | |
567 | case 8: value |= ATMEL_LCDC_PIXELSIZE_8; break; | |
568 | case 15: /* fall through */ | |
569 | case 16: value |= ATMEL_LCDC_PIXELSIZE_16; break; | |
570 | case 24: value |= ATMEL_LCDC_PIXELSIZE_24; break; | |
571 | case 32: value |= ATMEL_LCDC_PIXELSIZE_32; break; | |
572 | default: BUG(); break; | |
573 | } | |
574 | dev_dbg(info->device, " * LCDCON2 = %08lx\n", value); | |
575 | lcdc_writel(sinfo, ATMEL_LCDC_LCDCON2, value); | |
576 | ||
577 | /* Vertical timing */ | |
578 | value = (info->var.vsync_len - 1) << ATMEL_LCDC_VPW_OFFSET; | |
579 | value |= info->var.upper_margin << ATMEL_LCDC_VBP_OFFSET; | |
580 | value |= info->var.lower_margin; | |
581 | dev_dbg(info->device, " * LCDTIM1 = %08lx\n", value); | |
582 | lcdc_writel(sinfo, ATMEL_LCDC_TIM1, value); | |
583 | ||
584 | /* Horizontal timing */ | |
585 | value = (info->var.right_margin - 1) << ATMEL_LCDC_HFP_OFFSET; | |
586 | value |= (info->var.hsync_len - 1) << ATMEL_LCDC_HPW_OFFSET; | |
587 | value |= (info->var.left_margin - 1); | |
588 | dev_dbg(info->device, " * LCDTIM2 = %08lx\n", value); | |
589 | lcdc_writel(sinfo, ATMEL_LCDC_TIM2, value); | |
590 | ||
250a269d NF |
591 | /* Horizontal value (aka line size) */ |
592 | hozval_linesz = compute_hozval(info->var.xres, | |
593 | lcdc_readl(sinfo, ATMEL_LCDC_LCDCON2)); | |
594 | ||
14340586 | 595 | /* Display size */ |
250a269d | 596 | value = (hozval_linesz - 1) << ATMEL_LCDC_HOZVAL_OFFSET; |
14340586 | 597 | value |= info->var.yres - 1; |
250a269d | 598 | dev_dbg(info->device, " * LCDFRMCFG = %08lx\n", value); |
14340586 NF |
599 | lcdc_writel(sinfo, ATMEL_LCDC_LCDFRMCFG, value); |
600 | ||
601 | /* FIFO Threshold: Use formula from data sheet */ | |
602 | value = ATMEL_LCDC_FIFO_SIZE - (2 * ATMEL_LCDC_DMA_BURST_LEN + 3); | |
603 | lcdc_writel(sinfo, ATMEL_LCDC_FIFO, value); | |
604 | ||
605 | /* Toggle LCD_MODE every frame */ | |
606 | lcdc_writel(sinfo, ATMEL_LCDC_MVAL, 0); | |
607 | ||
608 | /* Disable all interrupts */ | |
609 | lcdc_writel(sinfo, ATMEL_LCDC_IDR, ~0UL); | |
d22579b8 NF |
610 | /* Enable FIFO & DMA errors */ |
611 | lcdc_writel(sinfo, ATMEL_LCDC_IER, ATMEL_LCDC_UFLWI | ATMEL_LCDC_OWRI | ATMEL_LCDC_MERI); | |
14340586 | 612 | |
14340586 NF |
613 | /* ...wait for DMA engine to become idle... */ |
614 | while (lcdc_readl(sinfo, ATMEL_LCDC_DMACON) & ATMEL_LCDC_DMABUSY) | |
615 | msleep(10); | |
616 | ||
3aa04f1b | 617 | atmel_lcdfb_start(sinfo); |
14340586 NF |
618 | |
619 | dev_dbg(info->device, " * DONE\n"); | |
620 | ||
621 | return 0; | |
622 | } | |
623 | ||
624 | static inline unsigned int chan_to_field(unsigned int chan, const struct fb_bitfield *bf) | |
625 | { | |
626 | chan &= 0xffff; | |
627 | chan >>= 16 - bf->length; | |
628 | return chan << bf->offset; | |
629 | } | |
630 | ||
631 | /** | |
632 | * atmel_lcdfb_setcolreg - Optional function. Sets a color register. | |
633 | * @regno: Which register in the CLUT we are programming | |
634 | * @red: The red value which can be up to 16 bits wide | |
635 | * @green: The green value which can be up to 16 bits wide | |
636 | * @blue: The blue value which can be up to 16 bits wide. | |
637 | * @transp: If supported the alpha value which can be up to 16 bits wide. | |
638 | * @info: frame buffer info structure | |
639 | * | |
640 | * Set a single color register. The values supplied have a 16 bit | |
641 | * magnitude which needs to be scaled in this function for the hardware. | |
642 | * Things to take into consideration are how many color registers, if | |
643 | * any, are supported with the current color visual. With truecolor mode | |
25985edc | 644 | * no color palettes are supported. Here a pseudo palette is created |
14340586 NF |
645 | * which we store the value in pseudo_palette in struct fb_info. For |
646 | * pseudocolor mode we have a limited color palette. To deal with this | |
647 | * we can program what color is displayed for a particular pixel value. | |
648 | * DirectColor is similar in that we can program each color field. If | |
649 | * we have a static colormap we don't need to implement this function. | |
650 | * | |
651 | * Returns negative errno on error, or zero on success. In an | |
652 | * ideal world, this would have been the case, but as it turns | |
653 | * out, the other drivers return 1 on failure, so that's what | |
654 | * we're going to do. | |
655 | */ | |
656 | static int atmel_lcdfb_setcolreg(unsigned int regno, unsigned int red, | |
657 | unsigned int green, unsigned int blue, | |
658 | unsigned int transp, struct fb_info *info) | |
659 | { | |
660 | struct atmel_lcdfb_info *sinfo = info->par; | |
661 | unsigned int val; | |
662 | u32 *pal; | |
663 | int ret = 1; | |
664 | ||
665 | if (info->var.grayscale) | |
666 | red = green = blue = (19595 * red + 38470 * green | |
667 | + 7471 * blue) >> 16; | |
668 | ||
669 | switch (info->fix.visual) { | |
670 | case FB_VISUAL_TRUECOLOR: | |
671 | if (regno < 16) { | |
672 | pal = info->pseudo_palette; | |
673 | ||
674 | val = chan_to_field(red, &info->var.red); | |
675 | val |= chan_to_field(green, &info->var.green); | |
676 | val |= chan_to_field(blue, &info->var.blue); | |
677 | ||
678 | pal[regno] = val; | |
679 | ret = 0; | |
680 | } | |
681 | break; | |
682 | ||
683 | case FB_VISUAL_PSEUDOCOLOR: | |
684 | if (regno < 256) { | |
685 | val = ((red >> 11) & 0x001f); | |
686 | val |= ((green >> 6) & 0x03e0); | |
687 | val |= ((blue >> 1) & 0x7c00); | |
688 | ||
689 | /* | |
690 | * TODO: intensity bit. Maybe something like | |
691 | * ~(red[10] ^ green[10] ^ blue[10]) & 1 | |
692 | */ | |
693 | ||
694 | lcdc_writel(sinfo, ATMEL_LCDC_LUT(regno), val); | |
695 | ret = 0; | |
696 | } | |
697 | break; | |
250a269d NF |
698 | |
699 | case FB_VISUAL_MONO01: | |
700 | if (regno < 2) { | |
701 | val = (regno == 0) ? 0x00 : 0x1F; | |
702 | lcdc_writel(sinfo, ATMEL_LCDC_LUT(regno), val); | |
703 | ret = 0; | |
704 | } | |
705 | break; | |
706 | ||
14340586 NF |
707 | } |
708 | ||
709 | return ret; | |
710 | } | |
711 | ||
712 | static int atmel_lcdfb_pan_display(struct fb_var_screeninfo *var, | |
713 | struct fb_info *info) | |
714 | { | |
715 | dev_dbg(info->device, "%s\n", __func__); | |
716 | ||
717 | atmel_lcdfb_update_dma(info, var); | |
718 | ||
719 | return 0; | |
720 | } | |
721 | ||
bed7bddb AB |
722 | static int atmel_lcdfb_blank(int blank_mode, struct fb_info *info) |
723 | { | |
724 | struct atmel_lcdfb_info *sinfo = info->par; | |
725 | ||
726 | switch (blank_mode) { | |
727 | case FB_BLANK_UNBLANK: | |
728 | case FB_BLANK_NORMAL: | |
729 | atmel_lcdfb_start(sinfo); | |
730 | break; | |
731 | case FB_BLANK_VSYNC_SUSPEND: | |
732 | case FB_BLANK_HSYNC_SUSPEND: | |
733 | break; | |
734 | case FB_BLANK_POWERDOWN: | |
735 | atmel_lcdfb_stop(sinfo); | |
736 | break; | |
737 | default: | |
738 | return -EINVAL; | |
739 | } | |
740 | ||
741 | /* let fbcon do a soft blank for us */ | |
742 | return ((blank_mode == FB_BLANK_NORMAL) ? 1 : 0); | |
743 | } | |
744 | ||
14340586 NF |
745 | static struct fb_ops atmel_lcdfb_ops = { |
746 | .owner = THIS_MODULE, | |
747 | .fb_check_var = atmel_lcdfb_check_var, | |
748 | .fb_set_par = atmel_lcdfb_set_par, | |
749 | .fb_setcolreg = atmel_lcdfb_setcolreg, | |
bed7bddb | 750 | .fb_blank = atmel_lcdfb_blank, |
14340586 NF |
751 | .fb_pan_display = atmel_lcdfb_pan_display, |
752 | .fb_fillrect = cfb_fillrect, | |
753 | .fb_copyarea = cfb_copyarea, | |
754 | .fb_imageblit = cfb_imageblit, | |
755 | }; | |
756 | ||
757 | static irqreturn_t atmel_lcdfb_interrupt(int irq, void *dev_id) | |
758 | { | |
759 | struct fb_info *info = dev_id; | |
760 | struct atmel_lcdfb_info *sinfo = info->par; | |
761 | u32 status; | |
762 | ||
763 | status = lcdc_readl(sinfo, ATMEL_LCDC_ISR); | |
d22579b8 NF |
764 | if (status & ATMEL_LCDC_UFLWI) { |
765 | dev_warn(info->device, "FIFO underflow %#x\n", status); | |
766 | /* reset DMA and FIFO to avoid screen shifting */ | |
767 | schedule_work(&sinfo->task); | |
768 | } | |
769 | lcdc_writel(sinfo, ATMEL_LCDC_ICR, status); | |
14340586 NF |
770 | return IRQ_HANDLED; |
771 | } | |
772 | ||
d22579b8 NF |
773 | /* |
774 | * LCD controller task (to reset the LCD) | |
775 | */ | |
776 | static void atmel_lcdfb_task(struct work_struct *work) | |
777 | { | |
778 | struct atmel_lcdfb_info *sinfo = | |
779 | container_of(work, struct atmel_lcdfb_info, task); | |
780 | ||
781 | atmel_lcdfb_reset(sinfo); | |
782 | } | |
783 | ||
14340586 NF |
784 | static int __init atmel_lcdfb_init_fbinfo(struct atmel_lcdfb_info *sinfo) |
785 | { | |
786 | struct fb_info *info = sinfo->info; | |
787 | int ret = 0; | |
788 | ||
14340586 NF |
789 | info->var.activate |= FB_ACTIVATE_FORCE | FB_ACTIVATE_NOW; |
790 | ||
791 | dev_info(info->device, | |
792 | "%luKiB frame buffer at %08lx (mapped at %p)\n", | |
793 | (unsigned long)info->fix.smem_len / 1024, | |
794 | (unsigned long)info->fix.smem_start, | |
795 | info->screen_base); | |
796 | ||
797 | /* Allocate colormap */ | |
798 | ret = fb_alloc_cmap(&info->cmap, 256, 0); | |
799 | if (ret < 0) | |
800 | dev_err(info->device, "Alloc color map failed\n"); | |
801 | ||
802 | return ret; | |
803 | } | |
804 | ||
805 | static void atmel_lcdfb_start_clock(struct atmel_lcdfb_info *sinfo) | |
806 | { | |
807 | if (sinfo->bus_clk) | |
808 | clk_enable(sinfo->bus_clk); | |
809 | clk_enable(sinfo->lcdc_clk); | |
810 | } | |
811 | ||
812 | static void atmel_lcdfb_stop_clock(struct atmel_lcdfb_info *sinfo) | |
813 | { | |
814 | if (sinfo->bus_clk) | |
815 | clk_disable(sinfo->bus_clk); | |
816 | clk_disable(sinfo->lcdc_clk); | |
817 | } | |
818 | ||
819 | ||
820 | static int __init atmel_lcdfb_probe(struct platform_device *pdev) | |
821 | { | |
822 | struct device *dev = &pdev->dev; | |
823 | struct fb_info *info; | |
824 | struct atmel_lcdfb_info *sinfo; | |
825 | struct atmel_lcdfb_info *pdata_sinfo; | |
968910bd | 826 | struct fb_videomode fbmode; |
14340586 NF |
827 | struct resource *regs = NULL; |
828 | struct resource *map = NULL; | |
829 | int ret; | |
830 | ||
831 | dev_dbg(dev, "%s BEGIN\n", __func__); | |
832 | ||
833 | ret = -ENOMEM; | |
834 | info = framebuffer_alloc(sizeof(struct atmel_lcdfb_info), dev); | |
835 | if (!info) { | |
836 | dev_err(dev, "cannot allocate memory\n"); | |
837 | goto out; | |
838 | } | |
839 | ||
840 | sinfo = info->par; | |
841 | ||
842 | if (dev->platform_data) { | |
843 | pdata_sinfo = (struct atmel_lcdfb_info *)dev->platform_data; | |
844 | sinfo->default_bpp = pdata_sinfo->default_bpp; | |
845 | sinfo->default_dmacon = pdata_sinfo->default_dmacon; | |
846 | sinfo->default_lcdcon2 = pdata_sinfo->default_lcdcon2; | |
847 | sinfo->default_monspecs = pdata_sinfo->default_monspecs; | |
848 | sinfo->atmel_lcdfb_power_control = pdata_sinfo->atmel_lcdfb_power_control; | |
849 | sinfo->guard_time = pdata_sinfo->guard_time; | |
ea757aca | 850 | sinfo->smem_len = pdata_sinfo->smem_len; |
a9a84c37 | 851 | sinfo->lcdcon_is_backlight = pdata_sinfo->lcdcon_is_backlight; |
7cdcdb69 | 852 | sinfo->lcdcon_pol_negative = pdata_sinfo->lcdcon_pol_negative; |
fd085801 | 853 | sinfo->lcd_wiring_mode = pdata_sinfo->lcd_wiring_mode; |
14340586 NF |
854 | } else { |
855 | dev_err(dev, "cannot get default configuration\n"); | |
856 | goto free_info; | |
857 | } | |
858 | sinfo->info = info; | |
859 | sinfo->pdev = pdev; | |
860 | ||
861 | strcpy(info->fix.id, sinfo->pdev->name); | |
862 | info->flags = ATMEL_LCDFB_FBINFO_DEFAULT; | |
863 | info->pseudo_palette = sinfo->pseudo_palette; | |
864 | info->fbops = &atmel_lcdfb_ops; | |
865 | ||
866 | memcpy(&info->monspecs, sinfo->default_monspecs, sizeof(info->monspecs)); | |
867 | info->fix = atmel_lcdfb_fix; | |
868 | ||
869 | /* Enable LCDC Clocks */ | |
915190f7 NF |
870 | if (cpu_is_at91sam9261() || cpu_is_at91sam9g10() |
871 | || cpu_is_at32ap7000()) { | |
14340586 NF |
872 | sinfo->bus_clk = clk_get(dev, "hck1"); |
873 | if (IS_ERR(sinfo->bus_clk)) { | |
874 | ret = PTR_ERR(sinfo->bus_clk); | |
875 | goto free_info; | |
876 | } | |
877 | } | |
878 | sinfo->lcdc_clk = clk_get(dev, "lcdc_clk"); | |
879 | if (IS_ERR(sinfo->lcdc_clk)) { | |
880 | ret = PTR_ERR(sinfo->lcdc_clk); | |
881 | goto put_bus_clk; | |
882 | } | |
883 | atmel_lcdfb_start_clock(sinfo); | |
884 | ||
885 | ret = fb_find_mode(&info->var, info, NULL, info->monspecs.modedb, | |
886 | info->monspecs.modedb_len, info->monspecs.modedb, | |
887 | sinfo->default_bpp); | |
888 | if (!ret) { | |
889 | dev_err(dev, "no suitable video mode found\n"); | |
890 | goto stop_clk; | |
891 | } | |
892 | ||
893 | ||
894 | regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
895 | if (!regs) { | |
896 | dev_err(dev, "resources unusable\n"); | |
897 | ret = -ENXIO; | |
898 | goto stop_clk; | |
899 | } | |
900 | ||
901 | sinfo->irq_base = platform_get_irq(pdev, 0); | |
902 | if (sinfo->irq_base < 0) { | |
903 | dev_err(dev, "unable to get irq\n"); | |
904 | ret = sinfo->irq_base; | |
905 | goto stop_clk; | |
906 | } | |
907 | ||
908 | /* Initialize video memory */ | |
909 | map = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
910 | if (map) { | |
911 | /* use a pre-allocated memory buffer */ | |
912 | info->fix.smem_start = map->start; | |
28f65c11 | 913 | info->fix.smem_len = resource_size(map); |
14340586 NF |
914 | if (!request_mem_region(info->fix.smem_start, |
915 | info->fix.smem_len, pdev->name)) { | |
916 | ret = -EBUSY; | |
917 | goto stop_clk; | |
918 | } | |
919 | ||
920 | info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len); | |
921 | if (!info->screen_base) | |
922 | goto release_intmem; | |
01d3a5e7 HS |
923 | |
924 | /* | |
925 | * Don't clear the framebuffer -- someone may have set | |
926 | * up a splash image. | |
927 | */ | |
14340586 NF |
928 | } else { |
929 | /* alocate memory buffer */ | |
930 | ret = atmel_lcdfb_alloc_video_memory(sinfo); | |
931 | if (ret < 0) { | |
932 | dev_err(dev, "cannot allocate framebuffer: %d\n", ret); | |
933 | goto stop_clk; | |
934 | } | |
935 | } | |
936 | ||
937 | /* LCDC registers */ | |
938 | info->fix.mmio_start = regs->start; | |
28f65c11 | 939 | info->fix.mmio_len = resource_size(regs); |
14340586 NF |
940 | |
941 | if (!request_mem_region(info->fix.mmio_start, | |
942 | info->fix.mmio_len, pdev->name)) { | |
943 | ret = -EBUSY; | |
944 | goto free_fb; | |
945 | } | |
946 | ||
947 | sinfo->mmio = ioremap(info->fix.mmio_start, info->fix.mmio_len); | |
948 | if (!sinfo->mmio) { | |
949 | dev_err(dev, "cannot map LCDC registers\n"); | |
950 | goto release_mem; | |
951 | } | |
952 | ||
a9a84c37 DB |
953 | /* Initialize PWM for contrast or backlight ("off") */ |
954 | init_contrast(sinfo); | |
955 | ||
14340586 NF |
956 | /* interrupt */ |
957 | ret = request_irq(sinfo->irq_base, atmel_lcdfb_interrupt, 0, pdev->name, info); | |
958 | if (ret) { | |
959 | dev_err(dev, "request_irq failed: %d\n", ret); | |
960 | goto unmap_mmio; | |
961 | } | |
962 | ||
d22579b8 NF |
963 | /* Some operations on the LCDC might sleep and |
964 | * require a preemptible task context */ | |
965 | INIT_WORK(&sinfo->task, atmel_lcdfb_task); | |
966 | ||
14340586 NF |
967 | ret = atmel_lcdfb_init_fbinfo(sinfo); |
968 | if (ret < 0) { | |
969 | dev_err(dev, "init fbinfo failed: %d\n", ret); | |
970 | goto unregister_irqs; | |
971 | } | |
972 | ||
973 | /* | |
974 | * This makes sure that our colour bitfield | |
975 | * descriptors are correctly initialised. | |
976 | */ | |
977 | atmel_lcdfb_check_var(&info->var, info); | |
978 | ||
979 | ret = fb_set_var(info, &info->var); | |
980 | if (ret) { | |
981 | dev_warn(dev, "unable to set display parameters\n"); | |
982 | goto free_cmap; | |
983 | } | |
984 | ||
985 | dev_set_drvdata(dev, info); | |
986 | ||
987 | /* | |
988 | * Tell the world that we're ready to go | |
989 | */ | |
990 | ret = register_framebuffer(info); | |
991 | if (ret < 0) { | |
992 | dev_err(dev, "failed to register framebuffer device: %d\n", ret); | |
34a35bdd | 993 | goto reset_drvdata; |
14340586 NF |
994 | } |
995 | ||
968910bd NF |
996 | /* add selected videomode to modelist */ |
997 | fb_var_to_videomode(&fbmode, &info->var); | |
998 | fb_add_videomode(&fbmode, &info->modelist); | |
999 | ||
14340586 NF |
1000 | /* Power up the LCDC screen */ |
1001 | if (sinfo->atmel_lcdfb_power_control) | |
1002 | sinfo->atmel_lcdfb_power_control(1); | |
1003 | ||
93f6ced9 | 1004 | dev_info(dev, "fb%d: Atmel LCDC at 0x%08lx (mapped at %p), irq %d\n", |
14340586 NF |
1005 | info->node, info->fix.mmio_start, sinfo->mmio, sinfo->irq_base); |
1006 | ||
1007 | return 0; | |
1008 | ||
34a35bdd SG |
1009 | reset_drvdata: |
1010 | dev_set_drvdata(dev, NULL); | |
14340586 NF |
1011 | free_cmap: |
1012 | fb_dealloc_cmap(&info->cmap); | |
1013 | unregister_irqs: | |
d22579b8 | 1014 | cancel_work_sync(&sinfo->task); |
14340586 NF |
1015 | free_irq(sinfo->irq_base, info); |
1016 | unmap_mmio: | |
a9a84c37 | 1017 | exit_backlight(sinfo); |
14340586 NF |
1018 | iounmap(sinfo->mmio); |
1019 | release_mem: | |
1020 | release_mem_region(info->fix.mmio_start, info->fix.mmio_len); | |
1021 | free_fb: | |
1022 | if (map) | |
1023 | iounmap(info->screen_base); | |
1024 | else | |
1025 | atmel_lcdfb_free_video_memory(sinfo); | |
1026 | ||
1027 | release_intmem: | |
1028 | if (map) | |
1029 | release_mem_region(info->fix.smem_start, info->fix.smem_len); | |
1030 | stop_clk: | |
1031 | atmel_lcdfb_stop_clock(sinfo); | |
1032 | clk_put(sinfo->lcdc_clk); | |
1033 | put_bus_clk: | |
1034 | if (sinfo->bus_clk) | |
1035 | clk_put(sinfo->bus_clk); | |
1036 | free_info: | |
1037 | framebuffer_release(info); | |
1038 | out: | |
1039 | dev_dbg(dev, "%s FAILED\n", __func__); | |
1040 | return ret; | |
1041 | } | |
1042 | ||
1043 | static int __exit atmel_lcdfb_remove(struct platform_device *pdev) | |
1044 | { | |
1045 | struct device *dev = &pdev->dev; | |
1046 | struct fb_info *info = dev_get_drvdata(dev); | |
34a35bdd | 1047 | struct atmel_lcdfb_info *sinfo; |
14340586 | 1048 | |
34a35bdd | 1049 | if (!info || !info->par) |
14340586 | 1050 | return 0; |
34a35bdd | 1051 | sinfo = info->par; |
14340586 | 1052 | |
d22579b8 | 1053 | cancel_work_sync(&sinfo->task); |
a9a84c37 | 1054 | exit_backlight(sinfo); |
14340586 NF |
1055 | if (sinfo->atmel_lcdfb_power_control) |
1056 | sinfo->atmel_lcdfb_power_control(0); | |
1057 | unregister_framebuffer(info); | |
1058 | atmel_lcdfb_stop_clock(sinfo); | |
1059 | clk_put(sinfo->lcdc_clk); | |
1060 | if (sinfo->bus_clk) | |
1061 | clk_put(sinfo->bus_clk); | |
1062 | fb_dealloc_cmap(&info->cmap); | |
1063 | free_irq(sinfo->irq_base, info); | |
1064 | iounmap(sinfo->mmio); | |
1065 | release_mem_region(info->fix.mmio_start, info->fix.mmio_len); | |
1066 | if (platform_get_resource(pdev, IORESOURCE_MEM, 1)) { | |
1067 | iounmap(info->screen_base); | |
1068 | release_mem_region(info->fix.smem_start, info->fix.smem_len); | |
1069 | } else { | |
1070 | atmel_lcdfb_free_video_memory(sinfo); | |
1071 | } | |
1072 | ||
1073 | dev_set_drvdata(dev, NULL); | |
1074 | framebuffer_release(info); | |
1075 | ||
1076 | return 0; | |
1077 | } | |
1078 | ||
cf19a37e DB |
1079 | #ifdef CONFIG_PM |
1080 | ||
1081 | static int atmel_lcdfb_suspend(struct platform_device *pdev, pm_message_t mesg) | |
1082 | { | |
1083 | struct fb_info *info = platform_get_drvdata(pdev); | |
1084 | struct atmel_lcdfb_info *sinfo = info->par; | |
1085 | ||
3aa04f1b HS |
1086 | /* |
1087 | * We don't want to handle interrupts while the clock is | |
1088 | * stopped. It may take forever. | |
1089 | */ | |
1090 | lcdc_writel(sinfo, ATMEL_LCDC_IDR, ~0UL); | |
1091 | ||
cf19a37e DB |
1092 | sinfo->saved_lcdcon = lcdc_readl(sinfo, ATMEL_LCDC_CONTRAST_VAL); |
1093 | lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, 0); | |
1094 | if (sinfo->atmel_lcdfb_power_control) | |
1095 | sinfo->atmel_lcdfb_power_control(0); | |
3aa04f1b HS |
1096 | |
1097 | atmel_lcdfb_stop(sinfo); | |
cf19a37e | 1098 | atmel_lcdfb_stop_clock(sinfo); |
3aa04f1b | 1099 | |
cf19a37e DB |
1100 | return 0; |
1101 | } | |
1102 | ||
1103 | static int atmel_lcdfb_resume(struct platform_device *pdev) | |
1104 | { | |
1105 | struct fb_info *info = platform_get_drvdata(pdev); | |
1106 | struct atmel_lcdfb_info *sinfo = info->par; | |
1107 | ||
1108 | atmel_lcdfb_start_clock(sinfo); | |
3aa04f1b | 1109 | atmel_lcdfb_start(sinfo); |
cf19a37e DB |
1110 | if (sinfo->atmel_lcdfb_power_control) |
1111 | sinfo->atmel_lcdfb_power_control(1); | |
1112 | lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, sinfo->saved_lcdcon); | |
3aa04f1b HS |
1113 | |
1114 | /* Enable FIFO & DMA errors */ | |
1115 | lcdc_writel(sinfo, ATMEL_LCDC_IER, ATMEL_LCDC_UFLWI | |
1116 | | ATMEL_LCDC_OWRI | ATMEL_LCDC_MERI); | |
1117 | ||
cf19a37e DB |
1118 | return 0; |
1119 | } | |
1120 | ||
1121 | #else | |
1122 | #define atmel_lcdfb_suspend NULL | |
1123 | #define atmel_lcdfb_resume NULL | |
1124 | #endif | |
1125 | ||
14340586 NF |
1126 | static struct platform_driver atmel_lcdfb_driver = { |
1127 | .remove = __exit_p(atmel_lcdfb_remove), | |
cf19a37e DB |
1128 | .suspend = atmel_lcdfb_suspend, |
1129 | .resume = atmel_lcdfb_resume, | |
a9a84c37 | 1130 | |
14340586 NF |
1131 | .driver = { |
1132 | .name = "atmel_lcdfb", | |
1133 | .owner = THIS_MODULE, | |
1134 | }, | |
1135 | }; | |
1136 | ||
1137 | static int __init atmel_lcdfb_init(void) | |
1138 | { | |
1139 | return platform_driver_probe(&atmel_lcdfb_driver, atmel_lcdfb_probe); | |
1140 | } | |
1141 | ||
1142 | static void __exit atmel_lcdfb_exit(void) | |
1143 | { | |
1144 | platform_driver_unregister(&atmel_lcdfb_driver); | |
1145 | } | |
1146 | ||
1147 | module_init(atmel_lcdfb_init); | |
1148 | module_exit(atmel_lcdfb_exit); | |
1149 | ||
1150 | MODULE_DESCRIPTION("AT91/AT32 LCD Controller framebuffer driver"); | |
8f4c79ce | 1151 | MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>"); |
14340586 | 1152 | MODULE_LICENSE("GPL"); |