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