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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> | |
7c2f891c SH |
23 | #include <linux/errno.h> |
24 | #include <linux/string.h> | |
25 | #include <linux/interrupt.h> | |
26 | #include <linux/slab.h> | |
27ac792c | 27 | #include <linux/mm.h> |
7c2f891c SH |
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 | ||
be509729 | 36 | #include <asm/arch/hardware.h> |
7c2f891c | 37 | #include <asm/io.h> |
7c2f891c SH |
38 | #include <asm/arch/imxfb.h> |
39 | ||
40 | /* | |
41 | * Complain if VAR is out of range. | |
42 | */ | |
43 | #define DEBUG_VAR 1 | |
44 | ||
45 | #include "imxfb.h" | |
46 | ||
47 | static struct imxfb_rgb def_rgb_16 = { | |
48 | .red = { .offset = 8, .length = 4, }, | |
49 | .green = { .offset = 4, .length = 4, }, | |
50 | .blue = { .offset = 0, .length = 4, }, | |
51 | .transp = { .offset = 0, .length = 0, }, | |
52 | }; | |
53 | ||
54 | static struct imxfb_rgb def_rgb_8 = { | |
55 | .red = { .offset = 0, .length = 8, }, | |
56 | .green = { .offset = 0, .length = 8, }, | |
57 | .blue = { .offset = 0, .length = 8, }, | |
58 | .transp = { .offset = 0, .length = 0, }, | |
59 | }; | |
60 | ||
61 | static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info); | |
62 | ||
63 | static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf) | |
64 | { | |
65 | chan &= 0xffff; | |
66 | chan >>= 16 - bf->length; | |
67 | return chan << bf->offset; | |
68 | } | |
69 | ||
70 | #define LCDC_PALETTE(x) __REG2(IMX_LCDC_BASE+0x800, (x)<<2) | |
71 | static int | |
72 | imxfb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue, | |
73 | u_int trans, struct fb_info *info) | |
74 | { | |
75 | struct imxfb_info *fbi = info->par; | |
76 | u_int val, ret = 1; | |
77 | ||
78 | #define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16) | |
79 | if (regno < fbi->palette_size) { | |
80 | val = (CNVT_TOHW(red, 4) << 8) | | |
81 | (CNVT_TOHW(green,4) << 4) | | |
82 | CNVT_TOHW(blue, 4); | |
83 | ||
84 | LCDC_PALETTE(regno) = val; | |
85 | ret = 0; | |
86 | } | |
87 | return ret; | |
88 | } | |
89 | ||
90 | static int | |
91 | imxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, | |
92 | u_int trans, struct fb_info *info) | |
93 | { | |
94 | struct imxfb_info *fbi = info->par; | |
95 | unsigned int val; | |
96 | int ret = 1; | |
97 | ||
98 | /* | |
99 | * If inverse mode was selected, invert all the colours | |
100 | * rather than the register number. The register number | |
101 | * is what you poke into the framebuffer to produce the | |
102 | * colour you requested. | |
103 | */ | |
104 | if (fbi->cmap_inverse) { | |
105 | red = 0xffff - red; | |
106 | green = 0xffff - green; | |
107 | blue = 0xffff - blue; | |
108 | } | |
109 | ||
110 | /* | |
111 | * If greyscale is true, then we convert the RGB value | |
112 | * to greyscale no mater what visual we are using. | |
113 | */ | |
114 | if (info->var.grayscale) | |
115 | red = green = blue = (19595 * red + 38470 * green + | |
116 | 7471 * blue) >> 16; | |
117 | ||
118 | switch (info->fix.visual) { | |
119 | case FB_VISUAL_TRUECOLOR: | |
120 | /* | |
121 | * 12 or 16-bit True Colour. We encode the RGB value | |
122 | * according to the RGB bitfield information. | |
123 | */ | |
124 | if (regno < 16) { | |
125 | u32 *pal = info->pseudo_palette; | |
126 | ||
127 | val = chan_to_field(red, &info->var.red); | |
128 | val |= chan_to_field(green, &info->var.green); | |
129 | val |= chan_to_field(blue, &info->var.blue); | |
130 | ||
131 | pal[regno] = val; | |
132 | ret = 0; | |
133 | } | |
134 | break; | |
135 | ||
136 | case FB_VISUAL_STATIC_PSEUDOCOLOR: | |
137 | case FB_VISUAL_PSEUDOCOLOR: | |
138 | ret = imxfb_setpalettereg(regno, red, green, blue, trans, info); | |
139 | break; | |
140 | } | |
141 | ||
142 | return ret; | |
143 | } | |
144 | ||
145 | /* | |
146 | * imxfb_check_var(): | |
147 | * Round up in the following order: bits_per_pixel, xres, | |
148 | * yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale, | |
149 | * bitfields, horizontal timing, vertical timing. | |
150 | */ | |
151 | static int | |
152 | imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) | |
153 | { | |
154 | struct imxfb_info *fbi = info->par; | |
155 | int rgbidx; | |
156 | ||
157 | if (var->xres < MIN_XRES) | |
158 | var->xres = MIN_XRES; | |
159 | if (var->yres < MIN_YRES) | |
160 | var->yres = MIN_YRES; | |
161 | if (var->xres > fbi->max_xres) | |
162 | var->xres = fbi->max_xres; | |
163 | if (var->yres > fbi->max_yres) | |
164 | var->yres = fbi->max_yres; | |
165 | var->xres_virtual = max(var->xres_virtual, var->xres); | |
166 | var->yres_virtual = max(var->yres_virtual, var->yres); | |
167 | ||
168 | pr_debug("var->bits_per_pixel=%d\n", var->bits_per_pixel); | |
169 | switch (var->bits_per_pixel) { | |
170 | case 16: | |
171 | rgbidx = RGB_16; | |
172 | break; | |
173 | case 8: | |
174 | rgbidx = RGB_8; | |
175 | break; | |
176 | default: | |
177 | rgbidx = RGB_16; | |
178 | } | |
179 | ||
180 | /* | |
181 | * Copy the RGB parameters for this display | |
182 | * from the machine specific parameters. | |
183 | */ | |
184 | var->red = fbi->rgb[rgbidx]->red; | |
185 | var->green = fbi->rgb[rgbidx]->green; | |
186 | var->blue = fbi->rgb[rgbidx]->blue; | |
187 | var->transp = fbi->rgb[rgbidx]->transp; | |
188 | ||
189 | pr_debug("RGBT length = %d:%d:%d:%d\n", | |
190 | var->red.length, var->green.length, var->blue.length, | |
191 | var->transp.length); | |
192 | ||
193 | pr_debug("RGBT offset = %d:%d:%d:%d\n", | |
194 | var->red.offset, var->green.offset, var->blue.offset, | |
195 | var->transp.offset); | |
196 | ||
197 | return 0; | |
198 | } | |
199 | ||
200 | /* | |
201 | * imxfb_set_par(): | |
202 | * Set the user defined part of the display for the specified console | |
203 | */ | |
204 | static int imxfb_set_par(struct fb_info *info) | |
205 | { | |
206 | struct imxfb_info *fbi = info->par; | |
207 | struct fb_var_screeninfo *var = &info->var; | |
208 | ||
209 | pr_debug("set_par\n"); | |
210 | ||
211 | if (var->bits_per_pixel == 16) | |
212 | info->fix.visual = FB_VISUAL_TRUECOLOR; | |
213 | else if (!fbi->cmap_static) | |
214 | info->fix.visual = FB_VISUAL_PSEUDOCOLOR; | |
215 | else { | |
216 | /* | |
217 | * Some people have weird ideas about wanting static | |
218 | * pseudocolor maps. I suspect their user space | |
219 | * applications are broken. | |
220 | */ | |
221 | info->fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR; | |
222 | } | |
223 | ||
224 | info->fix.line_length = var->xres_virtual * | |
225 | var->bits_per_pixel / 8; | |
226 | fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16; | |
227 | ||
228 | imxfb_activate_var(var, info); | |
229 | ||
230 | return 0; | |
231 | } | |
232 | ||
233 | static void imxfb_enable_controller(struct imxfb_info *fbi) | |
234 | { | |
235 | pr_debug("Enabling LCD controller\n"); | |
236 | ||
237 | /* initialize LCDC */ | |
238 | LCDC_RMCR &= ~RMCR_LCDC_EN; /* just to be safe... */ | |
239 | ||
240 | LCDC_SSA = fbi->screen_dma; | |
241 | /* physical screen start address */ | |
242 | LCDC_VPW = VPW_VPW(fbi->max_xres * fbi->max_bpp / 8 / 4); | |
243 | ||
244 | LCDC_POS = 0x00000000; /* panning offset 0 (0 pixel offset) */ | |
245 | ||
246 | /* disable hardware cursor */ | |
247 | LCDC_CPOS &= ~(CPOS_CC0 | CPOS_CC1); | |
248 | ||
7c2f891c SH |
249 | LCDC_RMCR = RMCR_LCDC_EN; |
250 | ||
251 | if(fbi->backlight_power) | |
252 | fbi->backlight_power(1); | |
253 | if(fbi->lcd_power) | |
254 | fbi->lcd_power(1); | |
255 | } | |
256 | ||
257 | static void imxfb_disable_controller(struct imxfb_info *fbi) | |
258 | { | |
259 | pr_debug("Disabling LCD controller\n"); | |
260 | ||
261 | if(fbi->backlight_power) | |
262 | fbi->backlight_power(0); | |
263 | if(fbi->lcd_power) | |
264 | fbi->lcd_power(0); | |
265 | ||
266 | LCDC_RMCR = 0; | |
267 | } | |
268 | ||
269 | static int imxfb_blank(int blank, struct fb_info *info) | |
270 | { | |
271 | struct imxfb_info *fbi = info->par; | |
272 | ||
273 | pr_debug("imxfb_blank: blank=%d\n", blank); | |
274 | ||
275 | switch (blank) { | |
276 | case FB_BLANK_POWERDOWN: | |
277 | case FB_BLANK_VSYNC_SUSPEND: | |
278 | case FB_BLANK_HSYNC_SUSPEND: | |
279 | case FB_BLANK_NORMAL: | |
280 | imxfb_disable_controller(fbi); | |
281 | break; | |
282 | ||
283 | case FB_BLANK_UNBLANK: | |
284 | imxfb_enable_controller(fbi); | |
285 | break; | |
286 | } | |
287 | return 0; | |
288 | } | |
289 | ||
290 | static struct fb_ops imxfb_ops = { | |
291 | .owner = THIS_MODULE, | |
292 | .fb_check_var = imxfb_check_var, | |
293 | .fb_set_par = imxfb_set_par, | |
294 | .fb_setcolreg = imxfb_setcolreg, | |
295 | .fb_fillrect = cfb_fillrect, | |
296 | .fb_copyarea = cfb_copyarea, | |
297 | .fb_imageblit = cfb_imageblit, | |
298 | .fb_blank = imxfb_blank, | |
7c2f891c SH |
299 | }; |
300 | ||
301 | /* | |
302 | * imxfb_activate_var(): | |
303 | * Configures LCD Controller based on entries in var parameter. Settings are | |
304 | * only written to the controller if changes were made. | |
305 | */ | |
306 | static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info) | |
307 | { | |
308 | struct imxfb_info *fbi = info->par; | |
309 | pr_debug("var: xres=%d hslen=%d lm=%d rm=%d\n", | |
310 | var->xres, var->hsync_len, | |
311 | var->left_margin, var->right_margin); | |
312 | pr_debug("var: yres=%d vslen=%d um=%d bm=%d\n", | |
313 | var->yres, var->vsync_len, | |
314 | var->upper_margin, var->lower_margin); | |
315 | ||
316 | #if DEBUG_VAR | |
317 | if (var->xres < 16 || var->xres > 1024) | |
318 | printk(KERN_ERR "%s: invalid xres %d\n", | |
319 | info->fix.id, var->xres); | |
320 | if (var->hsync_len < 1 || var->hsync_len > 64) | |
321 | printk(KERN_ERR "%s: invalid hsync_len %d\n", | |
322 | info->fix.id, var->hsync_len); | |
323 | if (var->left_margin > 255) | |
324 | printk(KERN_ERR "%s: invalid left_margin %d\n", | |
325 | info->fix.id, var->left_margin); | |
326 | if (var->right_margin > 255) | |
327 | printk(KERN_ERR "%s: invalid right_margin %d\n", | |
328 | info->fix.id, var->right_margin); | |
329 | if (var->yres < 1 || var->yres > 511) | |
330 | printk(KERN_ERR "%s: invalid yres %d\n", | |
331 | info->fix.id, var->yres); | |
332 | if (var->vsync_len > 100) | |
333 | printk(KERN_ERR "%s: invalid vsync_len %d\n", | |
334 | info->fix.id, var->vsync_len); | |
335 | if (var->upper_margin > 63) | |
336 | printk(KERN_ERR "%s: invalid upper_margin %d\n", | |
337 | info->fix.id, var->upper_margin); | |
338 | if (var->lower_margin > 255) | |
339 | printk(KERN_ERR "%s: invalid lower_margin %d\n", | |
340 | info->fix.id, var->lower_margin); | |
341 | #endif | |
342 | ||
343 | LCDC_HCR = HCR_H_WIDTH(var->hsync_len) | | |
344 | HCR_H_WAIT_1(var->left_margin) | | |
345 | HCR_H_WAIT_2(var->right_margin); | |
346 | ||
347 | LCDC_VCR = VCR_V_WIDTH(var->vsync_len) | | |
348 | VCR_V_WAIT_1(var->upper_margin) | | |
349 | VCR_V_WAIT_2(var->lower_margin); | |
350 | ||
351 | LCDC_SIZE = SIZE_XMAX(var->xres) | SIZE_YMAX(var->yres); | |
352 | LCDC_PCR = fbi->pcr; | |
353 | LCDC_PWMR = fbi->pwmr; | |
354 | LCDC_LSCR1 = fbi->lscr1; | |
772a9e63 | 355 | LCDC_DMACR = fbi->dmacr; |
7c2f891c SH |
356 | |
357 | return 0; | |
358 | } | |
359 | ||
360 | static void imxfb_setup_gpio(struct imxfb_info *fbi) | |
361 | { | |
362 | int width; | |
363 | ||
364 | LCDC_RMCR &= ~(RMCR_LCDC_EN | RMCR_SELF_REF); | |
365 | ||
366 | if( fbi->pcr & PCR_TFT ) | |
367 | width = 16; | |
368 | else | |
369 | width = 1 << ((fbi->pcr >> 28) & 0x3); | |
370 | ||
371 | switch(width) { | |
372 | case 16: | |
373 | imx_gpio_mode(PD30_PF_LD15); | |
374 | imx_gpio_mode(PD29_PF_LD14); | |
375 | imx_gpio_mode(PD28_PF_LD13); | |
376 | imx_gpio_mode(PD27_PF_LD12); | |
377 | imx_gpio_mode(PD26_PF_LD11); | |
378 | imx_gpio_mode(PD25_PF_LD10); | |
379 | imx_gpio_mode(PD24_PF_LD9); | |
380 | imx_gpio_mode(PD23_PF_LD8); | |
381 | case 8: | |
382 | imx_gpio_mode(PD22_PF_LD7); | |
383 | imx_gpio_mode(PD21_PF_LD6); | |
384 | imx_gpio_mode(PD20_PF_LD5); | |
385 | imx_gpio_mode(PD19_PF_LD4); | |
386 | case 4: | |
387 | imx_gpio_mode(PD18_PF_LD3); | |
388 | imx_gpio_mode(PD17_PF_LD2); | |
389 | case 2: | |
390 | imx_gpio_mode(PD16_PF_LD1); | |
391 | case 1: | |
392 | imx_gpio_mode(PD15_PF_LD0); | |
393 | } | |
394 | ||
395 | /* initialize GPIOs */ | |
396 | imx_gpio_mode(PD6_PF_LSCLK); | |
7c2f891c SH |
397 | imx_gpio_mode(PD11_PF_CONTRAST); |
398 | imx_gpio_mode(PD14_PF_FLM_VSYNC); | |
399 | imx_gpio_mode(PD13_PF_LP_HSYNC); | |
7c2f891c | 400 | imx_gpio_mode(PD12_PF_ACD_OE); |
7c2f891c | 401 | |
90e16ddd SH |
402 | /* These are only needed for Sharp HR TFT displays */ |
403 | if (fbi->pcr & PCR_SHARP) { | |
404 | imx_gpio_mode(PD7_PF_REV); | |
405 | imx_gpio_mode(PD8_PF_CLS); | |
406 | imx_gpio_mode(PD9_PF_PS); | |
407 | imx_gpio_mode(PD10_PF_SPL_SPR); | |
408 | } | |
7c2f891c SH |
409 | } |
410 | ||
411 | #ifdef CONFIG_PM | |
412 | /* | |
413 | * Power management hooks. Note that we won't be called from IRQ context, | |
414 | * unlike the blank functions above, so we may sleep. | |
415 | */ | |
3ae5eaec | 416 | static int imxfb_suspend(struct platform_device *dev, pm_message_t state) |
7c2f891c | 417 | { |
3ae5eaec | 418 | struct imxfb_info *fbi = platform_get_drvdata(dev); |
5ae12170 | 419 | pr_debug("%s\n",__func__); |
7c2f891c | 420 | |
9480e307 | 421 | imxfb_disable_controller(fbi); |
7c2f891c SH |
422 | return 0; |
423 | } | |
424 | ||
3ae5eaec | 425 | static int imxfb_resume(struct platform_device *dev) |
7c2f891c | 426 | { |
3ae5eaec | 427 | struct imxfb_info *fbi = platform_get_drvdata(dev); |
5ae12170 | 428 | pr_debug("%s\n",__func__); |
7c2f891c | 429 | |
9480e307 | 430 | imxfb_enable_controller(fbi); |
7c2f891c SH |
431 | return 0; |
432 | } | |
433 | #else | |
434 | #define imxfb_suspend NULL | |
435 | #define imxfb_resume NULL | |
436 | #endif | |
437 | ||
438 | static int __init imxfb_init_fbinfo(struct device *dev) | |
439 | { | |
440 | struct imxfb_mach_info *inf = dev->platform_data; | |
441 | struct fb_info *info = dev_get_drvdata(dev); | |
442 | struct imxfb_info *fbi = info->par; | |
443 | ||
5ae12170 | 444 | pr_debug("%s\n",__func__); |
7c2f891c SH |
445 | |
446 | info->pseudo_palette = kmalloc( sizeof(u32) * 16, GFP_KERNEL); | |
447 | if (!info->pseudo_palette) | |
448 | return -ENOMEM; | |
449 | ||
450 | memset(fbi, 0, sizeof(struct imxfb_info)); | |
451 | fbi->dev = dev; | |
452 | ||
453 | strlcpy(info->fix.id, IMX_NAME, sizeof(info->fix.id)); | |
454 | ||
455 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
456 | info->fix.type_aux = 0; | |
457 | info->fix.xpanstep = 0; | |
458 | info->fix.ypanstep = 0; | |
459 | info->fix.ywrapstep = 0; | |
460 | info->fix.accel = FB_ACCEL_NONE; | |
461 | ||
462 | info->var.nonstd = 0; | |
463 | info->var.activate = FB_ACTIVATE_NOW; | |
464 | info->var.height = -1; | |
465 | info->var.width = -1; | |
466 | info->var.accel_flags = 0; | |
467 | info->var.vmode = FB_VMODE_NONINTERLACED; | |
468 | ||
469 | info->fbops = &imxfb_ops; | |
9da505d1 | 470 | info->flags = FBINFO_FLAG_DEFAULT | FBINFO_READS_FAST; |
7c2f891c SH |
471 | |
472 | fbi->rgb[RGB_16] = &def_rgb_16; | |
473 | fbi->rgb[RGB_8] = &def_rgb_8; | |
474 | ||
475 | fbi->max_xres = inf->xres; | |
476 | info->var.xres = inf->xres; | |
477 | info->var.xres_virtual = inf->xres; | |
478 | fbi->max_yres = inf->yres; | |
479 | info->var.yres = inf->yres; | |
480 | info->var.yres_virtual = inf->yres; | |
481 | fbi->max_bpp = inf->bpp; | |
482 | info->var.bits_per_pixel = inf->bpp; | |
9da505d1 | 483 | info->var.nonstd = inf->nonstd; |
7c2f891c SH |
484 | info->var.pixclock = inf->pixclock; |
485 | info->var.hsync_len = inf->hsync_len; | |
486 | info->var.left_margin = inf->left_margin; | |
487 | info->var.right_margin = inf->right_margin; | |
488 | info->var.vsync_len = inf->vsync_len; | |
489 | info->var.upper_margin = inf->upper_margin; | |
490 | info->var.lower_margin = inf->lower_margin; | |
491 | info->var.sync = inf->sync; | |
492 | info->var.grayscale = inf->cmap_greyscale; | |
493 | fbi->cmap_inverse = inf->cmap_inverse; | |
90e16ddd | 494 | fbi->cmap_static = inf->cmap_static; |
7c2f891c SH |
495 | fbi->pcr = inf->pcr; |
496 | fbi->lscr1 = inf->lscr1; | |
772a9e63 | 497 | fbi->dmacr = inf->dmacr; |
7c2f891c SH |
498 | fbi->pwmr = inf->pwmr; |
499 | fbi->lcd_power = inf->lcd_power; | |
500 | fbi->backlight_power = inf->backlight_power; | |
501 | info->fix.smem_len = fbi->max_xres * fbi->max_yres * | |
502 | fbi->max_bpp / 8; | |
503 | ||
504 | return 0; | |
505 | } | |
506 | ||
507 | /* | |
508 | * Allocates the DRAM memory for the frame buffer. This buffer is | |
509 | * remapped into a non-cached, non-buffered, memory region to | |
510 | * allow pixel writes to occur without flushing the cache. | |
511 | * Once this area is remapped, all virtual memory access to the | |
512 | * video memory should occur at the new region. | |
513 | */ | |
514 | static int __init imxfb_map_video_memory(struct fb_info *info) | |
515 | { | |
516 | struct imxfb_info *fbi = info->par; | |
517 | ||
518 | fbi->map_size = PAGE_ALIGN(info->fix.smem_len); | |
519 | fbi->map_cpu = dma_alloc_writecombine(fbi->dev, fbi->map_size, | |
520 | &fbi->map_dma,GFP_KERNEL); | |
521 | ||
522 | if (fbi->map_cpu) { | |
523 | info->screen_base = fbi->map_cpu; | |
524 | fbi->screen_cpu = fbi->map_cpu; | |
525 | fbi->screen_dma = fbi->map_dma; | |
526 | info->fix.smem_start = fbi->screen_dma; | |
527 | } | |
528 | ||
529 | return fbi->map_cpu ? 0 : -ENOMEM; | |
530 | } | |
531 | ||
3ae5eaec | 532 | static int __init imxfb_probe(struct platform_device *pdev) |
7c2f891c | 533 | { |
7c2f891c SH |
534 | struct imxfb_info *fbi; |
535 | struct fb_info *info; | |
536 | struct imxfb_mach_info *inf; | |
537 | struct resource *res; | |
538 | int ret; | |
539 | ||
540 | printk("i.MX Framebuffer driver\n"); | |
541 | ||
542 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
543 | if(!res) | |
544 | return -ENODEV; | |
545 | ||
3ae5eaec | 546 | inf = pdev->dev.platform_data; |
7c2f891c | 547 | if(!inf) { |
f99c8929 | 548 | dev_err(&pdev->dev,"No platform_data available\n"); |
7c2f891c SH |
549 | return -ENOMEM; |
550 | } | |
551 | ||
3ae5eaec | 552 | info = framebuffer_alloc(sizeof(struct imxfb_info), &pdev->dev); |
7c2f891c SH |
553 | if(!info) |
554 | return -ENOMEM; | |
555 | ||
556 | fbi = info->par; | |
557 | ||
3ae5eaec | 558 | platform_set_drvdata(pdev, info); |
7c2f891c | 559 | |
3ae5eaec | 560 | ret = imxfb_init_fbinfo(&pdev->dev); |
7c2f891c SH |
561 | if( ret < 0 ) |
562 | goto failed_init; | |
563 | ||
564 | res = request_mem_region(res->start, res->end - res->start + 1, "IMXFB"); | |
565 | if (!res) { | |
566 | ret = -EBUSY; | |
567 | goto failed_regs; | |
568 | } | |
569 | ||
570 | if (!inf->fixed_screen_cpu) { | |
571 | ret = imxfb_map_video_memory(info); | |
572 | if (ret) { | |
f99c8929 | 573 | dev_err(&pdev->dev, "Failed to allocate video RAM: %d\n", ret); |
7c2f891c SH |
574 | ret = -ENOMEM; |
575 | goto failed_map; | |
576 | } | |
577 | } else { | |
578 | /* Fixed framebuffer mapping enables location of the screen in eSRAM */ | |
579 | fbi->map_cpu = inf->fixed_screen_cpu; | |
580 | fbi->map_dma = inf->fixed_screen_dma; | |
581 | info->screen_base = fbi->map_cpu; | |
582 | fbi->screen_cpu = fbi->map_cpu; | |
583 | fbi->screen_dma = fbi->map_dma; | |
584 | info->fix.smem_start = fbi->screen_dma; | |
585 | } | |
586 | ||
587 | /* | |
588 | * This makes sure that our colour bitfield | |
589 | * descriptors are correctly initialised. | |
590 | */ | |
591 | imxfb_check_var(&info->var, info); | |
592 | ||
593 | ret = fb_alloc_cmap(&info->cmap, 1<<info->var.bits_per_pixel, 0); | |
594 | if (ret < 0) | |
595 | goto failed_cmap; | |
596 | ||
597 | imxfb_setup_gpio(fbi); | |
598 | ||
599 | imxfb_set_par(info); | |
600 | ret = register_framebuffer(info); | |
601 | if (ret < 0) { | |
f99c8929 | 602 | dev_err(&pdev->dev, "failed to register framebuffer\n"); |
7c2f891c SH |
603 | goto failed_register; |
604 | } | |
605 | ||
606 | imxfb_enable_controller(fbi); | |
607 | ||
608 | return 0; | |
609 | ||
610 | failed_register: | |
611 | fb_dealloc_cmap(&info->cmap); | |
612 | failed_cmap: | |
613 | if (!inf->fixed_screen_cpu) | |
3ae5eaec | 614 | dma_free_writecombine(&pdev->dev,fbi->map_size,fbi->map_cpu, |
7c2f891c SH |
615 | fbi->map_dma); |
616 | failed_map: | |
617 | kfree(info->pseudo_palette); | |
618 | failed_regs: | |
619 | release_mem_region(res->start, res->end - res->start); | |
620 | failed_init: | |
3ae5eaec | 621 | platform_set_drvdata(pdev, NULL); |
7c2f891c SH |
622 | framebuffer_release(info); |
623 | return ret; | |
624 | } | |
625 | ||
3ae5eaec | 626 | static int imxfb_remove(struct platform_device *pdev) |
7c2f891c | 627 | { |
3ae5eaec | 628 | struct fb_info *info = platform_get_drvdata(pdev); |
772a9e63 | 629 | struct imxfb_info *fbi = info->par; |
7c2f891c SH |
630 | struct resource *res; |
631 | ||
632 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
633 | ||
772a9e63 | 634 | imxfb_disable_controller(fbi); |
7c2f891c SH |
635 | |
636 | unregister_framebuffer(info); | |
637 | ||
638 | fb_dealloc_cmap(&info->cmap); | |
639 | kfree(info->pseudo_palette); | |
640 | framebuffer_release(info); | |
641 | ||
642 | release_mem_region(res->start, res->end - res->start + 1); | |
3ae5eaec | 643 | platform_set_drvdata(pdev, NULL); |
7c2f891c SH |
644 | |
645 | return 0; | |
646 | } | |
647 | ||
3ae5eaec | 648 | void imxfb_shutdown(struct platform_device * dev) |
7c2f891c | 649 | { |
3ae5eaec | 650 | struct fb_info *info = platform_get_drvdata(dev); |
772a9e63 SH |
651 | struct imxfb_info *fbi = info->par; |
652 | imxfb_disable_controller(fbi); | |
7c2f891c SH |
653 | } |
654 | ||
3ae5eaec | 655 | static struct platform_driver imxfb_driver = { |
7c2f891c SH |
656 | .probe = imxfb_probe, |
657 | .suspend = imxfb_suspend, | |
658 | .resume = imxfb_resume, | |
659 | .remove = imxfb_remove, | |
660 | .shutdown = imxfb_shutdown, | |
3ae5eaec RK |
661 | .driver = { |
662 | .name = "imx-fb", | |
663 | }, | |
7c2f891c SH |
664 | }; |
665 | ||
666 | int __init imxfb_init(void) | |
667 | { | |
3ae5eaec | 668 | return platform_driver_register(&imxfb_driver); |
7c2f891c SH |
669 | } |
670 | ||
671 | static void __exit imxfb_cleanup(void) | |
672 | { | |
3ae5eaec | 673 | platform_driver_unregister(&imxfb_driver); |
7c2f891c SH |
674 | } |
675 | ||
676 | module_init(imxfb_init); | |
677 | module_exit(imxfb_cleanup); | |
678 | ||
679 | MODULE_DESCRIPTION("Motorola i.MX framebuffer driver"); | |
680 | MODULE_AUTHOR("Sascha Hauer, Pengutronix"); | |
681 | MODULE_LICENSE("GPL"); |