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7c2f891c SH |
1 | /* |
2 | * linux/drivers/video/imxfb.c | |
3 | * | |
4 | * Freescale i.MX Frame Buffer device driver | |
5 | * | |
6 | * Copyright (C) 2004 Sascha Hauer, Pengutronix | |
7 | * Based on acornfb.c Copyright (C) Russell King. | |
8 | * | |
9 | * This file is subject to the terms and conditions of the GNU General Public | |
10 | * License. See the file COPYING in the main directory of this archive for | |
11 | * more details. | |
12 | * | |
13 | * Please direct your questions and comments on this driver to the following | |
14 | * email address: | |
15 | * | |
16 | * linux-arm-kernel@lists.arm.linux.org.uk | |
17 | */ | |
18 | ||
19 | //#define DEBUG 1 | |
20 | ||
7c2f891c SH |
21 | #include <linux/module.h> |
22 | #include <linux/kernel.h> | |
23 | #include <linux/sched.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/string.h> | |
26 | #include <linux/interrupt.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/fb.h> | |
29 | #include <linux/delay.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/ioport.h> | |
32 | #include <linux/cpufreq.h> | |
d052d1be | 33 | #include <linux/platform_device.h> |
7c2f891c SH |
34 | #include <linux/dma-mapping.h> |
35 | ||
36 | #include <asm/hardware.h> | |
37 | #include <asm/io.h> | |
7c2f891c SH |
38 | #include <asm/uaccess.h> |
39 | #include <asm/arch/imxfb.h> | |
40 | ||
41 | /* | |
42 | * Complain if VAR is out of range. | |
43 | */ | |
44 | #define DEBUG_VAR 1 | |
45 | ||
46 | #include "imxfb.h" | |
47 | ||
48 | static struct imxfb_rgb def_rgb_16 = { | |
49 | .red = { .offset = 8, .length = 4, }, | |
50 | .green = { .offset = 4, .length = 4, }, | |
51 | .blue = { .offset = 0, .length = 4, }, | |
52 | .transp = { .offset = 0, .length = 0, }, | |
53 | }; | |
54 | ||
55 | static struct imxfb_rgb def_rgb_8 = { | |
56 | .red = { .offset = 0, .length = 8, }, | |
57 | .green = { .offset = 0, .length = 8, }, | |
58 | .blue = { .offset = 0, .length = 8, }, | |
59 | .transp = { .offset = 0, .length = 0, }, | |
60 | }; | |
61 | ||
62 | static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info); | |
63 | ||
64 | static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf) | |
65 | { | |
66 | chan &= 0xffff; | |
67 | chan >>= 16 - bf->length; | |
68 | return chan << bf->offset; | |
69 | } | |
70 | ||
71 | #define LCDC_PALETTE(x) __REG2(IMX_LCDC_BASE+0x800, (x)<<2) | |
72 | static int | |
73 | imxfb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue, | |
74 | u_int trans, struct fb_info *info) | |
75 | { | |
76 | struct imxfb_info *fbi = info->par; | |
77 | u_int val, ret = 1; | |
78 | ||
79 | #define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16) | |
80 | if (regno < fbi->palette_size) { | |
81 | val = (CNVT_TOHW(red, 4) << 8) | | |
82 | (CNVT_TOHW(green,4) << 4) | | |
83 | CNVT_TOHW(blue, 4); | |
84 | ||
85 | LCDC_PALETTE(regno) = val; | |
86 | ret = 0; | |
87 | } | |
88 | return ret; | |
89 | } | |
90 | ||
91 | static int | |
92 | imxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, | |
93 | u_int trans, struct fb_info *info) | |
94 | { | |
95 | struct imxfb_info *fbi = info->par; | |
96 | unsigned int val; | |
97 | int ret = 1; | |
98 | ||
99 | /* | |
100 | * If inverse mode was selected, invert all the colours | |
101 | * rather than the register number. The register number | |
102 | * is what you poke into the framebuffer to produce the | |
103 | * colour you requested. | |
104 | */ | |
105 | if (fbi->cmap_inverse) { | |
106 | red = 0xffff - red; | |
107 | green = 0xffff - green; | |
108 | blue = 0xffff - blue; | |
109 | } | |
110 | ||
111 | /* | |
112 | * If greyscale is true, then we convert the RGB value | |
113 | * to greyscale no mater what visual we are using. | |
114 | */ | |
115 | if (info->var.grayscale) | |
116 | red = green = blue = (19595 * red + 38470 * green + | |
117 | 7471 * blue) >> 16; | |
118 | ||
119 | switch (info->fix.visual) { | |
120 | case FB_VISUAL_TRUECOLOR: | |
121 | /* | |
122 | * 12 or 16-bit True Colour. We encode the RGB value | |
123 | * according to the RGB bitfield information. | |
124 | */ | |
125 | if (regno < 16) { | |
126 | u32 *pal = info->pseudo_palette; | |
127 | ||
128 | val = chan_to_field(red, &info->var.red); | |
129 | val |= chan_to_field(green, &info->var.green); | |
130 | val |= chan_to_field(blue, &info->var.blue); | |
131 | ||
132 | pal[regno] = val; | |
133 | ret = 0; | |
134 | } | |
135 | break; | |
136 | ||
137 | case FB_VISUAL_STATIC_PSEUDOCOLOR: | |
138 | case FB_VISUAL_PSEUDOCOLOR: | |
139 | ret = imxfb_setpalettereg(regno, red, green, blue, trans, info); | |
140 | break; | |
141 | } | |
142 | ||
143 | return ret; | |
144 | } | |
145 | ||
146 | /* | |
147 | * imxfb_check_var(): | |
148 | * Round up in the following order: bits_per_pixel, xres, | |
149 | * yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale, | |
150 | * bitfields, horizontal timing, vertical timing. | |
151 | */ | |
152 | static int | |
153 | imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) | |
154 | { | |
155 | struct imxfb_info *fbi = info->par; | |
156 | int rgbidx; | |
157 | ||
158 | if (var->xres < MIN_XRES) | |
159 | var->xres = MIN_XRES; | |
160 | if (var->yres < MIN_YRES) | |
161 | var->yres = MIN_YRES; | |
162 | if (var->xres > fbi->max_xres) | |
163 | var->xres = fbi->max_xres; | |
164 | if (var->yres > fbi->max_yres) | |
165 | var->yres = fbi->max_yres; | |
166 | var->xres_virtual = max(var->xres_virtual, var->xres); | |
167 | var->yres_virtual = max(var->yres_virtual, var->yres); | |
168 | ||
169 | pr_debug("var->bits_per_pixel=%d\n", var->bits_per_pixel); | |
170 | switch (var->bits_per_pixel) { | |
171 | case 16: | |
172 | rgbidx = RGB_16; | |
173 | break; | |
174 | case 8: | |
175 | rgbidx = RGB_8; | |
176 | break; | |
177 | default: | |
178 | rgbidx = RGB_16; | |
179 | } | |
180 | ||
181 | /* | |
182 | * Copy the RGB parameters for this display | |
183 | * from the machine specific parameters. | |
184 | */ | |
185 | var->red = fbi->rgb[rgbidx]->red; | |
186 | var->green = fbi->rgb[rgbidx]->green; | |
187 | var->blue = fbi->rgb[rgbidx]->blue; | |
188 | var->transp = fbi->rgb[rgbidx]->transp; | |
189 | ||
190 | pr_debug("RGBT length = %d:%d:%d:%d\n", | |
191 | var->red.length, var->green.length, var->blue.length, | |
192 | var->transp.length); | |
193 | ||
194 | pr_debug("RGBT offset = %d:%d:%d:%d\n", | |
195 | var->red.offset, var->green.offset, var->blue.offset, | |
196 | var->transp.offset); | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
201 | /* | |
202 | * imxfb_set_par(): | |
203 | * Set the user defined part of the display for the specified console | |
204 | */ | |
205 | static int imxfb_set_par(struct fb_info *info) | |
206 | { | |
207 | struct imxfb_info *fbi = info->par; | |
208 | struct fb_var_screeninfo *var = &info->var; | |
209 | ||
210 | pr_debug("set_par\n"); | |
211 | ||
212 | if (var->bits_per_pixel == 16) | |
213 | info->fix.visual = FB_VISUAL_TRUECOLOR; | |
214 | else if (!fbi->cmap_static) | |
215 | info->fix.visual = FB_VISUAL_PSEUDOCOLOR; | |
216 | else { | |
217 | /* | |
218 | * Some people have weird ideas about wanting static | |
219 | * pseudocolor maps. I suspect their user space | |
220 | * applications are broken. | |
221 | */ | |
222 | info->fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR; | |
223 | } | |
224 | ||
225 | info->fix.line_length = var->xres_virtual * | |
226 | var->bits_per_pixel / 8; | |
227 | fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16; | |
228 | ||
229 | imxfb_activate_var(var, info); | |
230 | ||
231 | return 0; | |
232 | } | |
233 | ||
234 | static void imxfb_enable_controller(struct imxfb_info *fbi) | |
235 | { | |
236 | pr_debug("Enabling LCD controller\n"); | |
237 | ||
238 | /* initialize LCDC */ | |
239 | LCDC_RMCR &= ~RMCR_LCDC_EN; /* just to be safe... */ | |
240 | ||
241 | LCDC_SSA = fbi->screen_dma; | |
242 | /* physical screen start address */ | |
243 | LCDC_VPW = VPW_VPW(fbi->max_xres * fbi->max_bpp / 8 / 4); | |
244 | ||
245 | LCDC_POS = 0x00000000; /* panning offset 0 (0 pixel offset) */ | |
246 | ||
247 | /* disable hardware cursor */ | |
248 | LCDC_CPOS &= ~(CPOS_CC0 | CPOS_CC1); | |
249 | ||
7c2f891c SH |
250 | LCDC_RMCR = RMCR_LCDC_EN; |
251 | ||
252 | if(fbi->backlight_power) | |
253 | fbi->backlight_power(1); | |
254 | if(fbi->lcd_power) | |
255 | fbi->lcd_power(1); | |
256 | } | |
257 | ||
258 | static void imxfb_disable_controller(struct imxfb_info *fbi) | |
259 | { | |
260 | pr_debug("Disabling LCD controller\n"); | |
261 | ||
262 | if(fbi->backlight_power) | |
263 | fbi->backlight_power(0); | |
264 | if(fbi->lcd_power) | |
265 | fbi->lcd_power(0); | |
266 | ||
267 | LCDC_RMCR = 0; | |
268 | } | |
269 | ||
270 | static int imxfb_blank(int blank, struct fb_info *info) | |
271 | { | |
272 | struct imxfb_info *fbi = info->par; | |
273 | ||
274 | pr_debug("imxfb_blank: blank=%d\n", blank); | |
275 | ||
276 | switch (blank) { | |
277 | case FB_BLANK_POWERDOWN: | |
278 | case FB_BLANK_VSYNC_SUSPEND: | |
279 | case FB_BLANK_HSYNC_SUSPEND: | |
280 | case FB_BLANK_NORMAL: | |
281 | imxfb_disable_controller(fbi); | |
282 | break; | |
283 | ||
284 | case FB_BLANK_UNBLANK: | |
285 | imxfb_enable_controller(fbi); | |
286 | break; | |
287 | } | |
288 | return 0; | |
289 | } | |
290 | ||
291 | static struct fb_ops imxfb_ops = { | |
292 | .owner = THIS_MODULE, | |
293 | .fb_check_var = imxfb_check_var, | |
294 | .fb_set_par = imxfb_set_par, | |
295 | .fb_setcolreg = imxfb_setcolreg, | |
296 | .fb_fillrect = cfb_fillrect, | |
297 | .fb_copyarea = cfb_copyarea, | |
298 | .fb_imageblit = cfb_imageblit, | |
299 | .fb_blank = imxfb_blank, | |
7c2f891c SH |
300 | }; |
301 | ||
302 | /* | |
303 | * imxfb_activate_var(): | |
304 | * Configures LCD Controller based on entries in var parameter. Settings are | |
305 | * only written to the controller if changes were made. | |
306 | */ | |
307 | static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info) | |
308 | { | |
309 | struct imxfb_info *fbi = info->par; | |
310 | pr_debug("var: xres=%d hslen=%d lm=%d rm=%d\n", | |
311 | var->xres, var->hsync_len, | |
312 | var->left_margin, var->right_margin); | |
313 | pr_debug("var: yres=%d vslen=%d um=%d bm=%d\n", | |
314 | var->yres, var->vsync_len, | |
315 | var->upper_margin, var->lower_margin); | |
316 | ||
317 | #if DEBUG_VAR | |
318 | if (var->xres < 16 || var->xres > 1024) | |
319 | printk(KERN_ERR "%s: invalid xres %d\n", | |
320 | info->fix.id, var->xres); | |
321 | if (var->hsync_len < 1 || var->hsync_len > 64) | |
322 | printk(KERN_ERR "%s: invalid hsync_len %d\n", | |
323 | info->fix.id, var->hsync_len); | |
324 | if (var->left_margin > 255) | |
325 | printk(KERN_ERR "%s: invalid left_margin %d\n", | |
326 | info->fix.id, var->left_margin); | |
327 | if (var->right_margin > 255) | |
328 | printk(KERN_ERR "%s: invalid right_margin %d\n", | |
329 | info->fix.id, var->right_margin); | |
330 | if (var->yres < 1 || var->yres > 511) | |
331 | printk(KERN_ERR "%s: invalid yres %d\n", | |
332 | info->fix.id, var->yres); | |
333 | if (var->vsync_len > 100) | |
334 | printk(KERN_ERR "%s: invalid vsync_len %d\n", | |
335 | info->fix.id, var->vsync_len); | |
336 | if (var->upper_margin > 63) | |
337 | printk(KERN_ERR "%s: invalid upper_margin %d\n", | |
338 | info->fix.id, var->upper_margin); | |
339 | if (var->lower_margin > 255) | |
340 | printk(KERN_ERR "%s: invalid lower_margin %d\n", | |
341 | info->fix.id, var->lower_margin); | |
342 | #endif | |
343 | ||
344 | LCDC_HCR = HCR_H_WIDTH(var->hsync_len) | | |
345 | HCR_H_WAIT_1(var->left_margin) | | |
346 | HCR_H_WAIT_2(var->right_margin); | |
347 | ||
348 | LCDC_VCR = VCR_V_WIDTH(var->vsync_len) | | |
349 | VCR_V_WAIT_1(var->upper_margin) | | |
350 | VCR_V_WAIT_2(var->lower_margin); | |
351 | ||
352 | LCDC_SIZE = SIZE_XMAX(var->xres) | SIZE_YMAX(var->yres); | |
353 | LCDC_PCR = fbi->pcr; | |
354 | LCDC_PWMR = fbi->pwmr; | |
355 | LCDC_LSCR1 = fbi->lscr1; | |
772a9e63 | 356 | LCDC_DMACR = fbi->dmacr; |
7c2f891c SH |
357 | |
358 | return 0; | |
359 | } | |
360 | ||
361 | static void imxfb_setup_gpio(struct imxfb_info *fbi) | |
362 | { | |
363 | int width; | |
364 | ||
365 | LCDC_RMCR &= ~(RMCR_LCDC_EN | RMCR_SELF_REF); | |
366 | ||
367 | if( fbi->pcr & PCR_TFT ) | |
368 | width = 16; | |
369 | else | |
370 | width = 1 << ((fbi->pcr >> 28) & 0x3); | |
371 | ||
372 | switch(width) { | |
373 | case 16: | |
374 | imx_gpio_mode(PD30_PF_LD15); | |
375 | imx_gpio_mode(PD29_PF_LD14); | |
376 | imx_gpio_mode(PD28_PF_LD13); | |
377 | imx_gpio_mode(PD27_PF_LD12); | |
378 | imx_gpio_mode(PD26_PF_LD11); | |
379 | imx_gpio_mode(PD25_PF_LD10); | |
380 | imx_gpio_mode(PD24_PF_LD9); | |
381 | imx_gpio_mode(PD23_PF_LD8); | |
382 | case 8: | |
383 | imx_gpio_mode(PD22_PF_LD7); | |
384 | imx_gpio_mode(PD21_PF_LD6); | |
385 | imx_gpio_mode(PD20_PF_LD5); | |
386 | imx_gpio_mode(PD19_PF_LD4); | |
387 | case 4: | |
388 | imx_gpio_mode(PD18_PF_LD3); | |
389 | imx_gpio_mode(PD17_PF_LD2); | |
390 | case 2: | |
391 | imx_gpio_mode(PD16_PF_LD1); | |
392 | case 1: | |
393 | imx_gpio_mode(PD15_PF_LD0); | |
394 | } | |
395 | ||
396 | /* initialize GPIOs */ | |
397 | imx_gpio_mode(PD6_PF_LSCLK); | |
398 | imx_gpio_mode(PD10_PF_SPL_SPR); | |
399 | imx_gpio_mode(PD11_PF_CONTRAST); | |
400 | imx_gpio_mode(PD14_PF_FLM_VSYNC); | |
401 | imx_gpio_mode(PD13_PF_LP_HSYNC); | |
402 | imx_gpio_mode(PD7_PF_REV); | |
403 | imx_gpio_mode(PD8_PF_CLS); | |
404 | ||
405 | #ifndef CONFIG_MACH_PIMX1 | |
406 | /* on PiMX1 used as buffers enable signal | |
407 | */ | |
408 | imx_gpio_mode(PD9_PF_PS); | |
409 | #endif | |
410 | ||
411 | #ifndef CONFIG_MACH_MX1FS2 | |
412 | /* on mx1fs2 this pin is used to (de)activate the display, so we need | |
413 | * it as a normal gpio | |
414 | */ | |
415 | imx_gpio_mode(PD12_PF_ACD_OE); | |
416 | #endif | |
417 | ||
418 | } | |
419 | ||
420 | #ifdef CONFIG_PM | |
421 | /* | |
422 | * Power management hooks. Note that we won't be called from IRQ context, | |
423 | * unlike the blank functions above, so we may sleep. | |
424 | */ | |
3ae5eaec | 425 | static int imxfb_suspend(struct platform_device *dev, pm_message_t state) |
7c2f891c | 426 | { |
3ae5eaec | 427 | struct imxfb_info *fbi = platform_get_drvdata(dev); |
7c2f891c SH |
428 | pr_debug("%s\n",__FUNCTION__); |
429 | ||
9480e307 | 430 | imxfb_disable_controller(fbi); |
7c2f891c SH |
431 | return 0; |
432 | } | |
433 | ||
3ae5eaec | 434 | static int imxfb_resume(struct platform_device *dev) |
7c2f891c | 435 | { |
3ae5eaec | 436 | struct imxfb_info *fbi = platform_get_drvdata(dev); |
7c2f891c SH |
437 | pr_debug("%s\n",__FUNCTION__); |
438 | ||
9480e307 | 439 | imxfb_enable_controller(fbi); |
7c2f891c SH |
440 | return 0; |
441 | } | |
442 | #else | |
443 | #define imxfb_suspend NULL | |
444 | #define imxfb_resume NULL | |
445 | #endif | |
446 | ||
447 | static int __init imxfb_init_fbinfo(struct device *dev) | |
448 | { | |
449 | struct imxfb_mach_info *inf = dev->platform_data; | |
450 | struct fb_info *info = dev_get_drvdata(dev); | |
451 | struct imxfb_info *fbi = info->par; | |
452 | ||
453 | pr_debug("%s\n",__FUNCTION__); | |
454 | ||
455 | info->pseudo_palette = kmalloc( sizeof(u32) * 16, GFP_KERNEL); | |
456 | if (!info->pseudo_palette) | |
457 | return -ENOMEM; | |
458 | ||
459 | memset(fbi, 0, sizeof(struct imxfb_info)); | |
460 | fbi->dev = dev; | |
461 | ||
462 | strlcpy(info->fix.id, IMX_NAME, sizeof(info->fix.id)); | |
463 | ||
464 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
465 | info->fix.type_aux = 0; | |
466 | info->fix.xpanstep = 0; | |
467 | info->fix.ypanstep = 0; | |
468 | info->fix.ywrapstep = 0; | |
469 | info->fix.accel = FB_ACCEL_NONE; | |
470 | ||
471 | info->var.nonstd = 0; | |
472 | info->var.activate = FB_ACTIVATE_NOW; | |
473 | info->var.height = -1; | |
474 | info->var.width = -1; | |
475 | info->var.accel_flags = 0; | |
476 | info->var.vmode = FB_VMODE_NONINTERLACED; | |
477 | ||
478 | info->fbops = &imxfb_ops; | |
479 | info->flags = FBINFO_FLAG_DEFAULT; | |
480 | info->pseudo_palette = (fbi + 1); | |
481 | ||
482 | fbi->rgb[RGB_16] = &def_rgb_16; | |
483 | fbi->rgb[RGB_8] = &def_rgb_8; | |
484 | ||
485 | fbi->max_xres = inf->xres; | |
486 | info->var.xres = inf->xres; | |
487 | info->var.xres_virtual = inf->xres; | |
488 | fbi->max_yres = inf->yres; | |
489 | info->var.yres = inf->yres; | |
490 | info->var.yres_virtual = inf->yres; | |
491 | fbi->max_bpp = inf->bpp; | |
492 | info->var.bits_per_pixel = inf->bpp; | |
493 | info->var.pixclock = inf->pixclock; | |
494 | info->var.hsync_len = inf->hsync_len; | |
495 | info->var.left_margin = inf->left_margin; | |
496 | info->var.right_margin = inf->right_margin; | |
497 | info->var.vsync_len = inf->vsync_len; | |
498 | info->var.upper_margin = inf->upper_margin; | |
499 | info->var.lower_margin = inf->lower_margin; | |
500 | info->var.sync = inf->sync; | |
501 | info->var.grayscale = inf->cmap_greyscale; | |
502 | fbi->cmap_inverse = inf->cmap_inverse; | |
503 | fbi->pcr = inf->pcr; | |
504 | fbi->lscr1 = inf->lscr1; | |
772a9e63 | 505 | fbi->dmacr = inf->dmacr; |
7c2f891c SH |
506 | fbi->pwmr = inf->pwmr; |
507 | fbi->lcd_power = inf->lcd_power; | |
508 | fbi->backlight_power = inf->backlight_power; | |
509 | info->fix.smem_len = fbi->max_xres * fbi->max_yres * | |
510 | fbi->max_bpp / 8; | |
511 | ||
512 | return 0; | |
513 | } | |
514 | ||
515 | /* | |
516 | * Allocates the DRAM memory for the frame buffer. This buffer is | |
517 | * remapped into a non-cached, non-buffered, memory region to | |
518 | * allow pixel writes to occur without flushing the cache. | |
519 | * Once this area is remapped, all virtual memory access to the | |
520 | * video memory should occur at the new region. | |
521 | */ | |
522 | static int __init imxfb_map_video_memory(struct fb_info *info) | |
523 | { | |
524 | struct imxfb_info *fbi = info->par; | |
525 | ||
526 | fbi->map_size = PAGE_ALIGN(info->fix.smem_len); | |
527 | fbi->map_cpu = dma_alloc_writecombine(fbi->dev, fbi->map_size, | |
528 | &fbi->map_dma,GFP_KERNEL); | |
529 | ||
530 | if (fbi->map_cpu) { | |
531 | info->screen_base = fbi->map_cpu; | |
532 | fbi->screen_cpu = fbi->map_cpu; | |
533 | fbi->screen_dma = fbi->map_dma; | |
534 | info->fix.smem_start = fbi->screen_dma; | |
535 | } | |
536 | ||
537 | return fbi->map_cpu ? 0 : -ENOMEM; | |
538 | } | |
539 | ||
3ae5eaec | 540 | static int __init imxfb_probe(struct platform_device *pdev) |
7c2f891c | 541 | { |
7c2f891c SH |
542 | struct imxfb_info *fbi; |
543 | struct fb_info *info; | |
544 | struct imxfb_mach_info *inf; | |
545 | struct resource *res; | |
546 | int ret; | |
547 | ||
548 | printk("i.MX Framebuffer driver\n"); | |
549 | ||
550 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
551 | if(!res) | |
552 | return -ENODEV; | |
553 | ||
3ae5eaec | 554 | inf = pdev->dev.platform_data; |
7c2f891c | 555 | if(!inf) { |
f99c8929 | 556 | dev_err(&pdev->dev,"No platform_data available\n"); |
7c2f891c SH |
557 | return -ENOMEM; |
558 | } | |
559 | ||
3ae5eaec | 560 | info = framebuffer_alloc(sizeof(struct imxfb_info), &pdev->dev); |
7c2f891c SH |
561 | if(!info) |
562 | return -ENOMEM; | |
563 | ||
564 | fbi = info->par; | |
565 | ||
3ae5eaec | 566 | platform_set_drvdata(pdev, info); |
7c2f891c | 567 | |
3ae5eaec | 568 | ret = imxfb_init_fbinfo(&pdev->dev); |
7c2f891c SH |
569 | if( ret < 0 ) |
570 | goto failed_init; | |
571 | ||
572 | res = request_mem_region(res->start, res->end - res->start + 1, "IMXFB"); | |
573 | if (!res) { | |
574 | ret = -EBUSY; | |
575 | goto failed_regs; | |
576 | } | |
577 | ||
578 | if (!inf->fixed_screen_cpu) { | |
579 | ret = imxfb_map_video_memory(info); | |
580 | if (ret) { | |
f99c8929 | 581 | dev_err(&pdev->dev, "Failed to allocate video RAM: %d\n", ret); |
7c2f891c SH |
582 | ret = -ENOMEM; |
583 | goto failed_map; | |
584 | } | |
585 | } else { | |
586 | /* Fixed framebuffer mapping enables location of the screen in eSRAM */ | |
587 | fbi->map_cpu = inf->fixed_screen_cpu; | |
588 | fbi->map_dma = inf->fixed_screen_dma; | |
589 | info->screen_base = fbi->map_cpu; | |
590 | fbi->screen_cpu = fbi->map_cpu; | |
591 | fbi->screen_dma = fbi->map_dma; | |
592 | info->fix.smem_start = fbi->screen_dma; | |
593 | } | |
594 | ||
595 | /* | |
596 | * This makes sure that our colour bitfield | |
597 | * descriptors are correctly initialised. | |
598 | */ | |
599 | imxfb_check_var(&info->var, info); | |
600 | ||
601 | ret = fb_alloc_cmap(&info->cmap, 1<<info->var.bits_per_pixel, 0); | |
602 | if (ret < 0) | |
603 | goto failed_cmap; | |
604 | ||
605 | imxfb_setup_gpio(fbi); | |
606 | ||
607 | imxfb_set_par(info); | |
608 | ret = register_framebuffer(info); | |
609 | if (ret < 0) { | |
f99c8929 | 610 | dev_err(&pdev->dev, "failed to register framebuffer\n"); |
7c2f891c SH |
611 | goto failed_register; |
612 | } | |
613 | ||
614 | imxfb_enable_controller(fbi); | |
615 | ||
616 | return 0; | |
617 | ||
618 | failed_register: | |
619 | fb_dealloc_cmap(&info->cmap); | |
620 | failed_cmap: | |
621 | if (!inf->fixed_screen_cpu) | |
3ae5eaec | 622 | dma_free_writecombine(&pdev->dev,fbi->map_size,fbi->map_cpu, |
7c2f891c SH |
623 | fbi->map_dma); |
624 | failed_map: | |
625 | kfree(info->pseudo_palette); | |
626 | failed_regs: | |
627 | release_mem_region(res->start, res->end - res->start); | |
628 | failed_init: | |
3ae5eaec | 629 | platform_set_drvdata(pdev, NULL); |
7c2f891c SH |
630 | framebuffer_release(info); |
631 | return ret; | |
632 | } | |
633 | ||
3ae5eaec | 634 | static int imxfb_remove(struct platform_device *pdev) |
7c2f891c | 635 | { |
3ae5eaec | 636 | struct fb_info *info = platform_get_drvdata(pdev); |
772a9e63 | 637 | struct imxfb_info *fbi = info->par; |
7c2f891c SH |
638 | struct resource *res; |
639 | ||
640 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
641 | ||
772a9e63 | 642 | imxfb_disable_controller(fbi); |
7c2f891c SH |
643 | |
644 | unregister_framebuffer(info); | |
645 | ||
646 | fb_dealloc_cmap(&info->cmap); | |
647 | kfree(info->pseudo_palette); | |
648 | framebuffer_release(info); | |
649 | ||
650 | release_mem_region(res->start, res->end - res->start + 1); | |
3ae5eaec | 651 | platform_set_drvdata(pdev, NULL); |
7c2f891c SH |
652 | |
653 | return 0; | |
654 | } | |
655 | ||
3ae5eaec | 656 | void imxfb_shutdown(struct platform_device * dev) |
7c2f891c | 657 | { |
3ae5eaec | 658 | struct fb_info *info = platform_get_drvdata(dev); |
772a9e63 SH |
659 | struct imxfb_info *fbi = info->par; |
660 | imxfb_disable_controller(fbi); | |
7c2f891c SH |
661 | } |
662 | ||
3ae5eaec | 663 | static struct platform_driver imxfb_driver = { |
7c2f891c SH |
664 | .probe = imxfb_probe, |
665 | .suspend = imxfb_suspend, | |
666 | .resume = imxfb_resume, | |
667 | .remove = imxfb_remove, | |
668 | .shutdown = imxfb_shutdown, | |
3ae5eaec RK |
669 | .driver = { |
670 | .name = "imx-fb", | |
671 | }, | |
7c2f891c SH |
672 | }; |
673 | ||
674 | int __init imxfb_init(void) | |
675 | { | |
3ae5eaec | 676 | return platform_driver_register(&imxfb_driver); |
7c2f891c SH |
677 | } |
678 | ||
679 | static void __exit imxfb_cleanup(void) | |
680 | { | |
3ae5eaec | 681 | platform_driver_unregister(&imxfb_driver); |
7c2f891c SH |
682 | } |
683 | ||
684 | module_init(imxfb_init); | |
685 | module_exit(imxfb_cleanup); | |
686 | ||
687 | MODULE_DESCRIPTION("Motorola i.MX framebuffer driver"); | |
688 | MODULE_AUTHOR("Sascha Hauer, Pengutronix"); | |
689 | MODULE_LICENSE("GPL"); |