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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 | ||
21 | #include <linux/config.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/sched.h> | |
25 | #include <linux/errno.h> | |
26 | #include <linux/string.h> | |
27 | #include <linux/interrupt.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/fb.h> | |
30 | #include <linux/delay.h> | |
31 | #include <linux/init.h> | |
32 | #include <linux/ioport.h> | |
33 | #include <linux/cpufreq.h> | |
34 | #include <linux/device.h> | |
35 | #include <linux/dma-mapping.h> | |
36 | ||
37 | #include <asm/hardware.h> | |
38 | #include <asm/io.h> | |
39 | #include <asm/mach-types.h> | |
40 | #include <asm/uaccess.h> | |
41 | #include <asm/arch/imxfb.h> | |
42 | ||
43 | /* | |
44 | * Complain if VAR is out of range. | |
45 | */ | |
46 | #define DEBUG_VAR 1 | |
47 | ||
48 | #include "imxfb.h" | |
49 | ||
50 | static struct imxfb_rgb def_rgb_16 = { | |
51 | .red = { .offset = 8, .length = 4, }, | |
52 | .green = { .offset = 4, .length = 4, }, | |
53 | .blue = { .offset = 0, .length = 4, }, | |
54 | .transp = { .offset = 0, .length = 0, }, | |
55 | }; | |
56 | ||
57 | static struct imxfb_rgb def_rgb_8 = { | |
58 | .red = { .offset = 0, .length = 8, }, | |
59 | .green = { .offset = 0, .length = 8, }, | |
60 | .blue = { .offset = 0, .length = 8, }, | |
61 | .transp = { .offset = 0, .length = 0, }, | |
62 | }; | |
63 | ||
64 | static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info); | |
65 | ||
66 | static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf) | |
67 | { | |
68 | chan &= 0xffff; | |
69 | chan >>= 16 - bf->length; | |
70 | return chan << bf->offset; | |
71 | } | |
72 | ||
73 | #define LCDC_PALETTE(x) __REG2(IMX_LCDC_BASE+0x800, (x)<<2) | |
74 | static int | |
75 | imxfb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue, | |
76 | u_int trans, struct fb_info *info) | |
77 | { | |
78 | struct imxfb_info *fbi = info->par; | |
79 | u_int val, ret = 1; | |
80 | ||
81 | #define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16) | |
82 | if (regno < fbi->palette_size) { | |
83 | val = (CNVT_TOHW(red, 4) << 8) | | |
84 | (CNVT_TOHW(green,4) << 4) | | |
85 | CNVT_TOHW(blue, 4); | |
86 | ||
87 | LCDC_PALETTE(regno) = val; | |
88 | ret = 0; | |
89 | } | |
90 | return ret; | |
91 | } | |
92 | ||
93 | static int | |
94 | imxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, | |
95 | u_int trans, struct fb_info *info) | |
96 | { | |
97 | struct imxfb_info *fbi = info->par; | |
98 | unsigned int val; | |
99 | int ret = 1; | |
100 | ||
101 | /* | |
102 | * If inverse mode was selected, invert all the colours | |
103 | * rather than the register number. The register number | |
104 | * is what you poke into the framebuffer to produce the | |
105 | * colour you requested. | |
106 | */ | |
107 | if (fbi->cmap_inverse) { | |
108 | red = 0xffff - red; | |
109 | green = 0xffff - green; | |
110 | blue = 0xffff - blue; | |
111 | } | |
112 | ||
113 | /* | |
114 | * If greyscale is true, then we convert the RGB value | |
115 | * to greyscale no mater what visual we are using. | |
116 | */ | |
117 | if (info->var.grayscale) | |
118 | red = green = blue = (19595 * red + 38470 * green + | |
119 | 7471 * blue) >> 16; | |
120 | ||
121 | switch (info->fix.visual) { | |
122 | case FB_VISUAL_TRUECOLOR: | |
123 | /* | |
124 | * 12 or 16-bit True Colour. We encode the RGB value | |
125 | * according to the RGB bitfield information. | |
126 | */ | |
127 | if (regno < 16) { | |
128 | u32 *pal = info->pseudo_palette; | |
129 | ||
130 | val = chan_to_field(red, &info->var.red); | |
131 | val |= chan_to_field(green, &info->var.green); | |
132 | val |= chan_to_field(blue, &info->var.blue); | |
133 | ||
134 | pal[regno] = val; | |
135 | ret = 0; | |
136 | } | |
137 | break; | |
138 | ||
139 | case FB_VISUAL_STATIC_PSEUDOCOLOR: | |
140 | case FB_VISUAL_PSEUDOCOLOR: | |
141 | ret = imxfb_setpalettereg(regno, red, green, blue, trans, info); | |
142 | break; | |
143 | } | |
144 | ||
145 | return ret; | |
146 | } | |
147 | ||
148 | /* | |
149 | * imxfb_check_var(): | |
150 | * Round up in the following order: bits_per_pixel, xres, | |
151 | * yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale, | |
152 | * bitfields, horizontal timing, vertical timing. | |
153 | */ | |
154 | static int | |
155 | imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) | |
156 | { | |
157 | struct imxfb_info *fbi = info->par; | |
158 | int rgbidx; | |
159 | ||
160 | if (var->xres < MIN_XRES) | |
161 | var->xres = MIN_XRES; | |
162 | if (var->yres < MIN_YRES) | |
163 | var->yres = MIN_YRES; | |
164 | if (var->xres > fbi->max_xres) | |
165 | var->xres = fbi->max_xres; | |
166 | if (var->yres > fbi->max_yres) | |
167 | var->yres = fbi->max_yres; | |
168 | var->xres_virtual = max(var->xres_virtual, var->xres); | |
169 | var->yres_virtual = max(var->yres_virtual, var->yres); | |
170 | ||
171 | pr_debug("var->bits_per_pixel=%d\n", var->bits_per_pixel); | |
172 | switch (var->bits_per_pixel) { | |
173 | case 16: | |
174 | rgbidx = RGB_16; | |
175 | break; | |
176 | case 8: | |
177 | rgbidx = RGB_8; | |
178 | break; | |
179 | default: | |
180 | rgbidx = RGB_16; | |
181 | } | |
182 | ||
183 | /* | |
184 | * Copy the RGB parameters for this display | |
185 | * from the machine specific parameters. | |
186 | */ | |
187 | var->red = fbi->rgb[rgbidx]->red; | |
188 | var->green = fbi->rgb[rgbidx]->green; | |
189 | var->blue = fbi->rgb[rgbidx]->blue; | |
190 | var->transp = fbi->rgb[rgbidx]->transp; | |
191 | ||
192 | pr_debug("RGBT length = %d:%d:%d:%d\n", | |
193 | var->red.length, var->green.length, var->blue.length, | |
194 | var->transp.length); | |
195 | ||
196 | pr_debug("RGBT offset = %d:%d:%d:%d\n", | |
197 | var->red.offset, var->green.offset, var->blue.offset, | |
198 | var->transp.offset); | |
199 | ||
200 | return 0; | |
201 | } | |
202 | ||
203 | /* | |
204 | * imxfb_set_par(): | |
205 | * Set the user defined part of the display for the specified console | |
206 | */ | |
207 | static int imxfb_set_par(struct fb_info *info) | |
208 | { | |
209 | struct imxfb_info *fbi = info->par; | |
210 | struct fb_var_screeninfo *var = &info->var; | |
211 | ||
212 | pr_debug("set_par\n"); | |
213 | ||
214 | if (var->bits_per_pixel == 16) | |
215 | info->fix.visual = FB_VISUAL_TRUECOLOR; | |
216 | else if (!fbi->cmap_static) | |
217 | info->fix.visual = FB_VISUAL_PSEUDOCOLOR; | |
218 | else { | |
219 | /* | |
220 | * Some people have weird ideas about wanting static | |
221 | * pseudocolor maps. I suspect their user space | |
222 | * applications are broken. | |
223 | */ | |
224 | info->fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR; | |
225 | } | |
226 | ||
227 | info->fix.line_length = var->xres_virtual * | |
228 | var->bits_per_pixel / 8; | |
229 | fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16; | |
230 | ||
231 | imxfb_activate_var(var, info); | |
232 | ||
233 | return 0; | |
234 | } | |
235 | ||
236 | static void imxfb_enable_controller(struct imxfb_info *fbi) | |
237 | { | |
238 | pr_debug("Enabling LCD controller\n"); | |
239 | ||
240 | /* initialize LCDC */ | |
241 | LCDC_RMCR &= ~RMCR_LCDC_EN; /* just to be safe... */ | |
242 | ||
243 | LCDC_SSA = fbi->screen_dma; | |
244 | /* physical screen start address */ | |
245 | LCDC_VPW = VPW_VPW(fbi->max_xres * fbi->max_bpp / 8 / 4); | |
246 | ||
247 | LCDC_POS = 0x00000000; /* panning offset 0 (0 pixel offset) */ | |
248 | ||
249 | /* disable hardware cursor */ | |
250 | LCDC_CPOS &= ~(CPOS_CC0 | CPOS_CC1); | |
251 | ||
7c2f891c SH |
252 | LCDC_RMCR = RMCR_LCDC_EN; |
253 | ||
254 | if(fbi->backlight_power) | |
255 | fbi->backlight_power(1); | |
256 | if(fbi->lcd_power) | |
257 | fbi->lcd_power(1); | |
258 | } | |
259 | ||
260 | static void imxfb_disable_controller(struct imxfb_info *fbi) | |
261 | { | |
262 | pr_debug("Disabling LCD controller\n"); | |
263 | ||
264 | if(fbi->backlight_power) | |
265 | fbi->backlight_power(0); | |
266 | if(fbi->lcd_power) | |
267 | fbi->lcd_power(0); | |
268 | ||
269 | LCDC_RMCR = 0; | |
270 | } | |
271 | ||
272 | static int imxfb_blank(int blank, struct fb_info *info) | |
273 | { | |
274 | struct imxfb_info *fbi = info->par; | |
275 | ||
276 | pr_debug("imxfb_blank: blank=%d\n", blank); | |
277 | ||
278 | switch (blank) { | |
279 | case FB_BLANK_POWERDOWN: | |
280 | case FB_BLANK_VSYNC_SUSPEND: | |
281 | case FB_BLANK_HSYNC_SUSPEND: | |
282 | case FB_BLANK_NORMAL: | |
283 | imxfb_disable_controller(fbi); | |
284 | break; | |
285 | ||
286 | case FB_BLANK_UNBLANK: | |
287 | imxfb_enable_controller(fbi); | |
288 | break; | |
289 | } | |
290 | return 0; | |
291 | } | |
292 | ||
293 | static struct fb_ops imxfb_ops = { | |
294 | .owner = THIS_MODULE, | |
295 | .fb_check_var = imxfb_check_var, | |
296 | .fb_set_par = imxfb_set_par, | |
297 | .fb_setcolreg = imxfb_setcolreg, | |
298 | .fb_fillrect = cfb_fillrect, | |
299 | .fb_copyarea = cfb_copyarea, | |
300 | .fb_imageblit = cfb_imageblit, | |
301 | .fb_blank = imxfb_blank, | |
302 | .fb_cursor = soft_cursor, /* FIXME: i.MX can do hardware cursor */ | |
303 | }; | |
304 | ||
305 | /* | |
306 | * imxfb_activate_var(): | |
307 | * Configures LCD Controller based on entries in var parameter. Settings are | |
308 | * only written to the controller if changes were made. | |
309 | */ | |
310 | static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info) | |
311 | { | |
312 | struct imxfb_info *fbi = info->par; | |
313 | pr_debug("var: xres=%d hslen=%d lm=%d rm=%d\n", | |
314 | var->xres, var->hsync_len, | |
315 | var->left_margin, var->right_margin); | |
316 | pr_debug("var: yres=%d vslen=%d um=%d bm=%d\n", | |
317 | var->yres, var->vsync_len, | |
318 | var->upper_margin, var->lower_margin); | |
319 | ||
320 | #if DEBUG_VAR | |
321 | if (var->xres < 16 || var->xres > 1024) | |
322 | printk(KERN_ERR "%s: invalid xres %d\n", | |
323 | info->fix.id, var->xres); | |
324 | if (var->hsync_len < 1 || var->hsync_len > 64) | |
325 | printk(KERN_ERR "%s: invalid hsync_len %d\n", | |
326 | info->fix.id, var->hsync_len); | |
327 | if (var->left_margin > 255) | |
328 | printk(KERN_ERR "%s: invalid left_margin %d\n", | |
329 | info->fix.id, var->left_margin); | |
330 | if (var->right_margin > 255) | |
331 | printk(KERN_ERR "%s: invalid right_margin %d\n", | |
332 | info->fix.id, var->right_margin); | |
333 | if (var->yres < 1 || var->yres > 511) | |
334 | printk(KERN_ERR "%s: invalid yres %d\n", | |
335 | info->fix.id, var->yres); | |
336 | if (var->vsync_len > 100) | |
337 | printk(KERN_ERR "%s: invalid vsync_len %d\n", | |
338 | info->fix.id, var->vsync_len); | |
339 | if (var->upper_margin > 63) | |
340 | printk(KERN_ERR "%s: invalid upper_margin %d\n", | |
341 | info->fix.id, var->upper_margin); | |
342 | if (var->lower_margin > 255) | |
343 | printk(KERN_ERR "%s: invalid lower_margin %d\n", | |
344 | info->fix.id, var->lower_margin); | |
345 | #endif | |
346 | ||
347 | LCDC_HCR = HCR_H_WIDTH(var->hsync_len) | | |
348 | HCR_H_WAIT_1(var->left_margin) | | |
349 | HCR_H_WAIT_2(var->right_margin); | |
350 | ||
351 | LCDC_VCR = VCR_V_WIDTH(var->vsync_len) | | |
352 | VCR_V_WAIT_1(var->upper_margin) | | |
353 | VCR_V_WAIT_2(var->lower_margin); | |
354 | ||
355 | LCDC_SIZE = SIZE_XMAX(var->xres) | SIZE_YMAX(var->yres); | |
356 | LCDC_PCR = fbi->pcr; | |
357 | LCDC_PWMR = fbi->pwmr; | |
358 | LCDC_LSCR1 = fbi->lscr1; | |
772a9e63 | 359 | LCDC_DMACR = fbi->dmacr; |
7c2f891c SH |
360 | |
361 | return 0; | |
362 | } | |
363 | ||
364 | static void imxfb_setup_gpio(struct imxfb_info *fbi) | |
365 | { | |
366 | int width; | |
367 | ||
368 | LCDC_RMCR &= ~(RMCR_LCDC_EN | RMCR_SELF_REF); | |
369 | ||
370 | if( fbi->pcr & PCR_TFT ) | |
371 | width = 16; | |
372 | else | |
373 | width = 1 << ((fbi->pcr >> 28) & 0x3); | |
374 | ||
375 | switch(width) { | |
376 | case 16: | |
377 | imx_gpio_mode(PD30_PF_LD15); | |
378 | imx_gpio_mode(PD29_PF_LD14); | |
379 | imx_gpio_mode(PD28_PF_LD13); | |
380 | imx_gpio_mode(PD27_PF_LD12); | |
381 | imx_gpio_mode(PD26_PF_LD11); | |
382 | imx_gpio_mode(PD25_PF_LD10); | |
383 | imx_gpio_mode(PD24_PF_LD9); | |
384 | imx_gpio_mode(PD23_PF_LD8); | |
385 | case 8: | |
386 | imx_gpio_mode(PD22_PF_LD7); | |
387 | imx_gpio_mode(PD21_PF_LD6); | |
388 | imx_gpio_mode(PD20_PF_LD5); | |
389 | imx_gpio_mode(PD19_PF_LD4); | |
390 | case 4: | |
391 | imx_gpio_mode(PD18_PF_LD3); | |
392 | imx_gpio_mode(PD17_PF_LD2); | |
393 | case 2: | |
394 | imx_gpio_mode(PD16_PF_LD1); | |
395 | case 1: | |
396 | imx_gpio_mode(PD15_PF_LD0); | |
397 | } | |
398 | ||
399 | /* initialize GPIOs */ | |
400 | imx_gpio_mode(PD6_PF_LSCLK); | |
401 | imx_gpio_mode(PD10_PF_SPL_SPR); | |
402 | imx_gpio_mode(PD11_PF_CONTRAST); | |
403 | imx_gpio_mode(PD14_PF_FLM_VSYNC); | |
404 | imx_gpio_mode(PD13_PF_LP_HSYNC); | |
405 | imx_gpio_mode(PD7_PF_REV); | |
406 | imx_gpio_mode(PD8_PF_CLS); | |
407 | ||
408 | #ifndef CONFIG_MACH_PIMX1 | |
409 | /* on PiMX1 used as buffers enable signal | |
410 | */ | |
411 | imx_gpio_mode(PD9_PF_PS); | |
412 | #endif | |
413 | ||
414 | #ifndef CONFIG_MACH_MX1FS2 | |
415 | /* on mx1fs2 this pin is used to (de)activate the display, so we need | |
416 | * it as a normal gpio | |
417 | */ | |
418 | imx_gpio_mode(PD12_PF_ACD_OE); | |
419 | #endif | |
420 | ||
421 | } | |
422 | ||
423 | #ifdef CONFIG_PM | |
424 | /* | |
425 | * Power management hooks. Note that we won't be called from IRQ context, | |
426 | * unlike the blank functions above, so we may sleep. | |
427 | */ | |
428 | static int imxfb_suspend(struct device *dev, u32 state, u32 level) | |
429 | { | |
430 | struct imxfb_info *fbi = dev_get_drvdata(dev); | |
431 | pr_debug("%s\n",__FUNCTION__); | |
432 | ||
433 | if (level == SUSPEND_DISABLE || level == SUSPEND_POWER_DOWN) | |
434 | imxfb_disable_controller(fbi); | |
435 | return 0; | |
436 | } | |
437 | ||
438 | static int imxfb_resume(struct device *dev, u32 level) | |
439 | { | |
440 | struct imxfb_info *fbi = dev_get_drvdata(dev); | |
441 | pr_debug("%s\n",__FUNCTION__); | |
442 | ||
443 | if (level == RESUME_ENABLE) | |
444 | imxfb_enable_controller(fbi); | |
445 | return 0; | |
446 | } | |
447 | #else | |
448 | #define imxfb_suspend NULL | |
449 | #define imxfb_resume NULL | |
450 | #endif | |
451 | ||
452 | static int __init imxfb_init_fbinfo(struct device *dev) | |
453 | { | |
454 | struct imxfb_mach_info *inf = dev->platform_data; | |
455 | struct fb_info *info = dev_get_drvdata(dev); | |
456 | struct imxfb_info *fbi = info->par; | |
457 | ||
458 | pr_debug("%s\n",__FUNCTION__); | |
459 | ||
460 | info->pseudo_palette = kmalloc( sizeof(u32) * 16, GFP_KERNEL); | |
461 | if (!info->pseudo_palette) | |
462 | return -ENOMEM; | |
463 | ||
464 | memset(fbi, 0, sizeof(struct imxfb_info)); | |
465 | fbi->dev = dev; | |
466 | ||
467 | strlcpy(info->fix.id, IMX_NAME, sizeof(info->fix.id)); | |
468 | ||
469 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
470 | info->fix.type_aux = 0; | |
471 | info->fix.xpanstep = 0; | |
472 | info->fix.ypanstep = 0; | |
473 | info->fix.ywrapstep = 0; | |
474 | info->fix.accel = FB_ACCEL_NONE; | |
475 | ||
476 | info->var.nonstd = 0; | |
477 | info->var.activate = FB_ACTIVATE_NOW; | |
478 | info->var.height = -1; | |
479 | info->var.width = -1; | |
480 | info->var.accel_flags = 0; | |
481 | info->var.vmode = FB_VMODE_NONINTERLACED; | |
482 | ||
483 | info->fbops = &imxfb_ops; | |
484 | info->flags = FBINFO_FLAG_DEFAULT; | |
485 | info->pseudo_palette = (fbi + 1); | |
486 | ||
487 | fbi->rgb[RGB_16] = &def_rgb_16; | |
488 | fbi->rgb[RGB_8] = &def_rgb_8; | |
489 | ||
490 | fbi->max_xres = inf->xres; | |
491 | info->var.xres = inf->xres; | |
492 | info->var.xres_virtual = inf->xres; | |
493 | fbi->max_yres = inf->yres; | |
494 | info->var.yres = inf->yres; | |
495 | info->var.yres_virtual = inf->yres; | |
496 | fbi->max_bpp = inf->bpp; | |
497 | info->var.bits_per_pixel = inf->bpp; | |
498 | info->var.pixclock = inf->pixclock; | |
499 | info->var.hsync_len = inf->hsync_len; | |
500 | info->var.left_margin = inf->left_margin; | |
501 | info->var.right_margin = inf->right_margin; | |
502 | info->var.vsync_len = inf->vsync_len; | |
503 | info->var.upper_margin = inf->upper_margin; | |
504 | info->var.lower_margin = inf->lower_margin; | |
505 | info->var.sync = inf->sync; | |
506 | info->var.grayscale = inf->cmap_greyscale; | |
507 | fbi->cmap_inverse = inf->cmap_inverse; | |
508 | fbi->pcr = inf->pcr; | |
509 | fbi->lscr1 = inf->lscr1; | |
772a9e63 | 510 | fbi->dmacr = inf->dmacr; |
7c2f891c SH |
511 | fbi->pwmr = inf->pwmr; |
512 | fbi->lcd_power = inf->lcd_power; | |
513 | fbi->backlight_power = inf->backlight_power; | |
514 | info->fix.smem_len = fbi->max_xres * fbi->max_yres * | |
515 | fbi->max_bpp / 8; | |
516 | ||
517 | return 0; | |
518 | } | |
519 | ||
520 | /* | |
521 | * Allocates the DRAM memory for the frame buffer. This buffer is | |
522 | * remapped into a non-cached, non-buffered, memory region to | |
523 | * allow pixel writes to occur without flushing the cache. | |
524 | * Once this area is remapped, all virtual memory access to the | |
525 | * video memory should occur at the new region. | |
526 | */ | |
527 | static int __init imxfb_map_video_memory(struct fb_info *info) | |
528 | { | |
529 | struct imxfb_info *fbi = info->par; | |
530 | ||
531 | fbi->map_size = PAGE_ALIGN(info->fix.smem_len); | |
532 | fbi->map_cpu = dma_alloc_writecombine(fbi->dev, fbi->map_size, | |
533 | &fbi->map_dma,GFP_KERNEL); | |
534 | ||
535 | if (fbi->map_cpu) { | |
536 | info->screen_base = fbi->map_cpu; | |
537 | fbi->screen_cpu = fbi->map_cpu; | |
538 | fbi->screen_dma = fbi->map_dma; | |
539 | info->fix.smem_start = fbi->screen_dma; | |
540 | } | |
541 | ||
542 | return fbi->map_cpu ? 0 : -ENOMEM; | |
543 | } | |
544 | ||
545 | static int __init imxfb_probe(struct device *dev) | |
546 | { | |
547 | struct platform_device *pdev = to_platform_device(dev); | |
548 | struct imxfb_info *fbi; | |
549 | struct fb_info *info; | |
550 | struct imxfb_mach_info *inf; | |
551 | struct resource *res; | |
552 | int ret; | |
553 | ||
554 | printk("i.MX Framebuffer driver\n"); | |
555 | ||
556 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
557 | if(!res) | |
558 | return -ENODEV; | |
559 | ||
560 | inf = dev->platform_data; | |
561 | if(!inf) { | |
562 | dev_err(dev,"No platform_data available\n"); | |
563 | return -ENOMEM; | |
564 | } | |
565 | ||
566 | info = framebuffer_alloc(sizeof(struct imxfb_info), dev); | |
567 | if(!info) | |
568 | return -ENOMEM; | |
569 | ||
570 | fbi = info->par; | |
571 | ||
572 | dev_set_drvdata(dev, info); | |
573 | ||
574 | ret = imxfb_init_fbinfo(dev); | |
575 | if( ret < 0 ) | |
576 | goto failed_init; | |
577 | ||
578 | res = request_mem_region(res->start, res->end - res->start + 1, "IMXFB"); | |
579 | if (!res) { | |
580 | ret = -EBUSY; | |
581 | goto failed_regs; | |
582 | } | |
583 | ||
584 | if (!inf->fixed_screen_cpu) { | |
585 | ret = imxfb_map_video_memory(info); | |
586 | if (ret) { | |
587 | dev_err(dev, "Failed to allocate video RAM: %d\n", ret); | |
588 | ret = -ENOMEM; | |
589 | goto failed_map; | |
590 | } | |
591 | } else { | |
592 | /* Fixed framebuffer mapping enables location of the screen in eSRAM */ | |
593 | fbi->map_cpu = inf->fixed_screen_cpu; | |
594 | fbi->map_dma = inf->fixed_screen_dma; | |
595 | info->screen_base = fbi->map_cpu; | |
596 | fbi->screen_cpu = fbi->map_cpu; | |
597 | fbi->screen_dma = fbi->map_dma; | |
598 | info->fix.smem_start = fbi->screen_dma; | |
599 | } | |
600 | ||
601 | /* | |
602 | * This makes sure that our colour bitfield | |
603 | * descriptors are correctly initialised. | |
604 | */ | |
605 | imxfb_check_var(&info->var, info); | |
606 | ||
607 | ret = fb_alloc_cmap(&info->cmap, 1<<info->var.bits_per_pixel, 0); | |
608 | if (ret < 0) | |
609 | goto failed_cmap; | |
610 | ||
611 | imxfb_setup_gpio(fbi); | |
612 | ||
613 | imxfb_set_par(info); | |
614 | ret = register_framebuffer(info); | |
615 | if (ret < 0) { | |
616 | dev_err(dev, "failed to register framebuffer\n"); | |
617 | goto failed_register; | |
618 | } | |
619 | ||
620 | imxfb_enable_controller(fbi); | |
621 | ||
622 | return 0; | |
623 | ||
624 | failed_register: | |
625 | fb_dealloc_cmap(&info->cmap); | |
626 | failed_cmap: | |
627 | if (!inf->fixed_screen_cpu) | |
628 | dma_free_writecombine(dev,fbi->map_size,fbi->map_cpu, | |
629 | fbi->map_dma); | |
630 | failed_map: | |
631 | kfree(info->pseudo_palette); | |
632 | failed_regs: | |
633 | release_mem_region(res->start, res->end - res->start); | |
634 | failed_init: | |
635 | dev_set_drvdata(dev, NULL); | |
636 | framebuffer_release(info); | |
637 | return ret; | |
638 | } | |
639 | ||
640 | static int imxfb_remove(struct device *dev) | |
641 | { | |
642 | struct platform_device *pdev = to_platform_device(dev); | |
643 | struct fb_info *info = dev_get_drvdata(dev); | |
772a9e63 | 644 | struct imxfb_info *fbi = info->par; |
7c2f891c SH |
645 | struct resource *res; |
646 | ||
647 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
648 | ||
772a9e63 | 649 | imxfb_disable_controller(fbi); |
7c2f891c SH |
650 | |
651 | unregister_framebuffer(info); | |
652 | ||
653 | fb_dealloc_cmap(&info->cmap); | |
654 | kfree(info->pseudo_palette); | |
655 | framebuffer_release(info); | |
656 | ||
657 | release_mem_region(res->start, res->end - res->start + 1); | |
658 | dev_set_drvdata(dev, NULL); | |
659 | ||
660 | return 0; | |
661 | } | |
662 | ||
663 | void imxfb_shutdown(struct device * dev) | |
664 | { | |
772a9e63 SH |
665 | struct fb_info *info = dev_get_drvdata(dev); |
666 | struct imxfb_info *fbi = info->par; | |
667 | imxfb_disable_controller(fbi); | |
7c2f891c SH |
668 | } |
669 | ||
670 | static struct device_driver imxfb_driver = { | |
671 | .name = "imx-fb", | |
672 | .bus = &platform_bus_type, | |
673 | .probe = imxfb_probe, | |
674 | .suspend = imxfb_suspend, | |
675 | .resume = imxfb_resume, | |
676 | .remove = imxfb_remove, | |
677 | .shutdown = imxfb_shutdown, | |
678 | }; | |
679 | ||
680 | int __init imxfb_init(void) | |
681 | { | |
682 | return driver_register(&imxfb_driver); | |
683 | } | |
684 | ||
685 | static void __exit imxfb_cleanup(void) | |
686 | { | |
687 | driver_unregister(&imxfb_driver); | |
688 | } | |
689 | ||
690 | module_init(imxfb_init); | |
691 | module_exit(imxfb_cleanup); | |
692 | ||
693 | MODULE_DESCRIPTION("Motorola i.MX framebuffer driver"); | |
694 | MODULE_AUTHOR("Sascha Hauer, Pengutronix"); | |
695 | MODULE_LICENSE("GPL"); |