Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/drivers/video/amba-clcd.c | |
3 | * | |
4 | * Copyright (C) 2001 ARM Limited, by David A Rusling | |
5 | * Updated to 2.5, Deep Blue Solutions Ltd. | |
6 | * | |
7 | * This file is subject to the terms and conditions of the GNU General Public | |
8 | * License. See the file COPYING in the main directory of this archive | |
9 | * for more details. | |
10 | * | |
11 | * ARM PrimeCell PL110 Color LCD Controller | |
12 | */ | |
13 | #include <linux/module.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/errno.h> | |
16 | #include <linux/string.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/mm.h> | |
20 | #include <linux/fb.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/ioport.h> | |
23 | #include <linux/list.h> | |
a62c80e5 RK |
24 | #include <linux/amba/bus.h> |
25 | #include <linux/amba/clcd.h> | |
f8ce2547 | 26 | #include <linux/clk.h> |
934848da | 27 | #include <linux/hardirq.h> |
1da177e4 | 28 | |
c6b8fdad | 29 | #include <asm/sizes.h> |
1da177e4 | 30 | |
1da177e4 LT |
31 | #define to_clcd(info) container_of(info, struct clcd_fb, fb) |
32 | ||
33 | /* This is limited to 16 characters when displayed by X startup */ | |
34 | static const char *clcd_name = "CLCD FB"; | |
35 | ||
36 | /* | |
37 | * Unfortunately, the enable/disable functions may be called either from | |
38 | * process or IRQ context, and we _need_ to delay. This is _not_ good. | |
39 | */ | |
40 | static inline void clcdfb_sleep(unsigned int ms) | |
41 | { | |
42 | if (in_atomic()) { | |
43 | mdelay(ms); | |
44 | } else { | |
45 | msleep(ms); | |
46 | } | |
47 | } | |
48 | ||
49 | static inline void clcdfb_set_start(struct clcd_fb *fb) | |
50 | { | |
51 | unsigned long ustart = fb->fb.fix.smem_start; | |
52 | unsigned long lstart; | |
53 | ||
54 | ustart += fb->fb.var.yoffset * fb->fb.fix.line_length; | |
55 | lstart = ustart + fb->fb.var.yres * fb->fb.fix.line_length / 2; | |
56 | ||
57 | writel(ustart, fb->regs + CLCD_UBAS); | |
58 | writel(lstart, fb->regs + CLCD_LBAS); | |
59 | } | |
60 | ||
61 | static void clcdfb_disable(struct clcd_fb *fb) | |
62 | { | |
63 | u32 val; | |
64 | ||
65 | if (fb->board->disable) | |
66 | fb->board->disable(fb); | |
67 | ||
3f17522c | 68 | val = readl(fb->regs + fb->off_cntl); |
1da177e4 LT |
69 | if (val & CNTL_LCDPWR) { |
70 | val &= ~CNTL_LCDPWR; | |
3f17522c | 71 | writel(val, fb->regs + fb->off_cntl); |
1da177e4 LT |
72 | |
73 | clcdfb_sleep(20); | |
74 | } | |
75 | if (val & CNTL_LCDEN) { | |
76 | val &= ~CNTL_LCDEN; | |
3f17522c | 77 | writel(val, fb->regs + fb->off_cntl); |
1da177e4 LT |
78 | } |
79 | ||
80 | /* | |
81 | * Disable CLCD clock source. | |
82 | */ | |
99c796df RK |
83 | if (fb->clk_enabled) { |
84 | fb->clk_enabled = false; | |
85 | clk_disable(fb->clk); | |
86 | } | |
1da177e4 LT |
87 | } |
88 | ||
89 | static void clcdfb_enable(struct clcd_fb *fb, u32 cntl) | |
90 | { | |
91 | /* | |
92 | * Enable the CLCD clock source. | |
93 | */ | |
99c796df RK |
94 | if (!fb->clk_enabled) { |
95 | fb->clk_enabled = true; | |
96 | clk_enable(fb->clk); | |
97 | } | |
1da177e4 LT |
98 | |
99 | /* | |
100 | * Bring up by first enabling.. | |
101 | */ | |
102 | cntl |= CNTL_LCDEN; | |
3f17522c | 103 | writel(cntl, fb->regs + fb->off_cntl); |
1da177e4 LT |
104 | |
105 | clcdfb_sleep(20); | |
106 | ||
107 | /* | |
108 | * and now apply power. | |
109 | */ | |
110 | cntl |= CNTL_LCDPWR; | |
3f17522c | 111 | writel(cntl, fb->regs + fb->off_cntl); |
1da177e4 LT |
112 | |
113 | /* | |
114 | * finally, enable the interface. | |
115 | */ | |
116 | if (fb->board->enable) | |
117 | fb->board->enable(fb); | |
118 | } | |
119 | ||
120 | static int | |
121 | clcdfb_set_bitfields(struct clcd_fb *fb, struct fb_var_screeninfo *var) | |
122 | { | |
7b4e9ced | 123 | u32 caps; |
1da177e4 LT |
124 | int ret = 0; |
125 | ||
7b4e9ced RK |
126 | if (fb->panel->caps && fb->board->caps) |
127 | caps = fb->panel->caps & fb->board->caps; | |
128 | else { | |
129 | /* Old way of specifying what can be used */ | |
130 | caps = fb->panel->cntl & CNTL_BGR ? | |
131 | CLCD_CAP_BGR : CLCD_CAP_RGB; | |
132 | /* But mask out 444 modes as they weren't supported */ | |
133 | caps &= ~CLCD_CAP_444; | |
134 | } | |
135 | ||
136 | /* Only TFT panels can do RGB888/BGR888 */ | |
137 | if (!(fb->panel->cntl & CNTL_LCDTFT)) | |
138 | caps &= ~CLCD_CAP_888; | |
139 | ||
1da177e4 | 140 | memset(&var->transp, 0, sizeof(var->transp)); |
c43e6f02 RK |
141 | |
142 | var->red.msb_right = 0; | |
143 | var->green.msb_right = 0; | |
144 | var->blue.msb_right = 0; | |
1da177e4 LT |
145 | |
146 | switch (var->bits_per_pixel) { | |
147 | case 1: | |
148 | case 2: | |
149 | case 4: | |
150 | case 8: | |
7b4e9ced RK |
151 | /* If we can't do 5551, reject */ |
152 | caps &= CLCD_CAP_5551; | |
153 | if (!caps) { | |
154 | ret = -EINVAL; | |
155 | break; | |
156 | } | |
157 | ||
c4d12b98 | 158 | var->red.length = var->bits_per_pixel; |
1da177e4 | 159 | var->red.offset = 0; |
c4d12b98 | 160 | var->green.length = var->bits_per_pixel; |
1da177e4 | 161 | var->green.offset = 0; |
c4d12b98 | 162 | var->blue.length = var->bits_per_pixel; |
1da177e4 LT |
163 | var->blue.offset = 0; |
164 | break; | |
7b4e9ced | 165 | |
1da177e4 | 166 | case 16: |
7b4e9ced RK |
167 | /* If we can't do 444, 5551 or 565, reject */ |
168 | if (!(caps & (CLCD_CAP_444 | CLCD_CAP_5551 | CLCD_CAP_565))) { | |
169 | ret = -EINVAL; | |
170 | break; | |
171 | } | |
172 | ||
c43e6f02 | 173 | /* |
7b4e9ced RK |
174 | * Green length can be 4, 5 or 6 depending whether |
175 | * we're operating in 444, 5551 or 565 mode. | |
c43e6f02 | 176 | */ |
7b4e9ced RK |
177 | if (var->green.length == 4 && caps & CLCD_CAP_444) |
178 | caps &= CLCD_CAP_444; | |
179 | if (var->green.length == 5 && caps & CLCD_CAP_5551) | |
180 | caps &= CLCD_CAP_5551; | |
181 | else if (var->green.length == 6 && caps & CLCD_CAP_565) | |
182 | caps &= CLCD_CAP_565; | |
183 | else { | |
184 | /* | |
185 | * PL110 officially only supports RGB555, | |
186 | * but may be wired up to allow RGB565. | |
187 | */ | |
188 | if (caps & CLCD_CAP_565) { | |
189 | var->green.length = 6; | |
190 | caps &= CLCD_CAP_565; | |
191 | } else if (caps & CLCD_CAP_5551) { | |
192 | var->green.length = 5; | |
193 | caps &= CLCD_CAP_5551; | |
194 | } else { | |
195 | var->green.length = 4; | |
196 | caps &= CLCD_CAP_444; | |
197 | } | |
198 | } | |
199 | ||
200 | if (var->green.length >= 5) { | |
201 | var->red.length = 5; | |
202 | var->blue.length = 5; | |
203 | } else { | |
204 | var->red.length = 4; | |
205 | var->blue.length = 4; | |
206 | } | |
1da177e4 | 207 | break; |
82235e91 | 208 | case 32: |
7b4e9ced RK |
209 | /* If we can't do 888, reject */ |
210 | caps &= CLCD_CAP_888; | |
211 | if (!caps) { | |
212 | ret = -EINVAL; | |
1da177e4 LT |
213 | break; |
214 | } | |
7b4e9ced RK |
215 | |
216 | var->red.length = 8; | |
217 | var->green.length = 8; | |
218 | var->blue.length = 8; | |
219 | break; | |
1da177e4 LT |
220 | default: |
221 | ret = -EINVAL; | |
222 | break; | |
223 | } | |
224 | ||
c43e6f02 RK |
225 | /* |
226 | * >= 16bpp displays have separate colour component bitfields | |
227 | * encoded in the pixel data. Calculate their position from | |
228 | * the bitfield length defined above. | |
229 | */ | |
230 | if (ret == 0 && var->bits_per_pixel >= 16) { | |
7b4e9ced RK |
231 | bool bgr, rgb; |
232 | ||
233 | bgr = caps & CLCD_CAP_BGR && var->blue.offset == 0; | |
234 | rgb = caps & CLCD_CAP_RGB && var->red.offset == 0; | |
235 | ||
236 | if (!bgr && !rgb) | |
237 | /* | |
238 | * The requested format was not possible, try just | |
239 | * our capabilities. One of BGR or RGB must be | |
240 | * supported. | |
241 | */ | |
242 | bgr = caps & CLCD_CAP_BGR; | |
243 | ||
244 | if (bgr) { | |
c43e6f02 RK |
245 | var->blue.offset = 0; |
246 | var->green.offset = var->blue.offset + var->blue.length; | |
247 | var->red.offset = var->green.offset + var->green.length; | |
248 | } else { | |
249 | var->red.offset = 0; | |
250 | var->green.offset = var->red.offset + var->red.length; | |
251 | var->blue.offset = var->green.offset + var->green.length; | |
252 | } | |
253 | } | |
254 | ||
1da177e4 LT |
255 | return ret; |
256 | } | |
257 | ||
258 | static int clcdfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) | |
259 | { | |
260 | struct clcd_fb *fb = to_clcd(info); | |
261 | int ret = -EINVAL; | |
262 | ||
263 | if (fb->board->check) | |
264 | ret = fb->board->check(fb, var); | |
82235e91 RK |
265 | |
266 | if (ret == 0 && | |
267 | var->xres_virtual * var->bits_per_pixel / 8 * | |
268 | var->yres_virtual > fb->fb.fix.smem_len) | |
269 | ret = -EINVAL; | |
270 | ||
1da177e4 LT |
271 | if (ret == 0) |
272 | ret = clcdfb_set_bitfields(fb, var); | |
273 | ||
274 | return ret; | |
275 | } | |
276 | ||
277 | static int clcdfb_set_par(struct fb_info *info) | |
278 | { | |
279 | struct clcd_fb *fb = to_clcd(info); | |
280 | struct clcd_regs regs; | |
281 | ||
282 | fb->fb.fix.line_length = fb->fb.var.xres_virtual * | |
283 | fb->fb.var.bits_per_pixel / 8; | |
284 | ||
285 | if (fb->fb.var.bits_per_pixel <= 8) | |
286 | fb->fb.fix.visual = FB_VISUAL_PSEUDOCOLOR; | |
287 | else | |
288 | fb->fb.fix.visual = FB_VISUAL_TRUECOLOR; | |
289 | ||
290 | fb->board->decode(fb, ®s); | |
291 | ||
292 | clcdfb_disable(fb); | |
293 | ||
294 | writel(regs.tim0, fb->regs + CLCD_TIM0); | |
295 | writel(regs.tim1, fb->regs + CLCD_TIM1); | |
296 | writel(regs.tim2, fb->regs + CLCD_TIM2); | |
297 | writel(regs.tim3, fb->regs + CLCD_TIM3); | |
298 | ||
299 | clcdfb_set_start(fb); | |
300 | ||
301 | clk_set_rate(fb->clk, (1000000000 / regs.pixclock) * 1000); | |
302 | ||
303 | fb->clcd_cntl = regs.cntl; | |
304 | ||
305 | clcdfb_enable(fb, regs.cntl); | |
306 | ||
307 | #ifdef DEBUG | |
ad361c98 JP |
308 | printk(KERN_INFO |
309 | "CLCD: Registers set to\n" | |
310 | " %08x %08x %08x %08x\n" | |
311 | " %08x %08x %08x %08x\n", | |
1da177e4 LT |
312 | readl(fb->regs + CLCD_TIM0), readl(fb->regs + CLCD_TIM1), |
313 | readl(fb->regs + CLCD_TIM2), readl(fb->regs + CLCD_TIM3), | |
314 | readl(fb->regs + CLCD_UBAS), readl(fb->regs + CLCD_LBAS), | |
3f17522c | 315 | readl(fb->regs + fb->off_ienb), readl(fb->regs + fb->off_cntl)); |
1da177e4 LT |
316 | #endif |
317 | ||
318 | return 0; | |
319 | } | |
320 | ||
321 | static inline u32 convert_bitfield(int val, struct fb_bitfield *bf) | |
322 | { | |
323 | unsigned int mask = (1 << bf->length) - 1; | |
324 | ||
325 | return (val >> (16 - bf->length) & mask) << bf->offset; | |
326 | } | |
327 | ||
328 | /* | |
329 | * Set a single color register. The values supplied have a 16 bit | |
330 | * magnitude. Return != 0 for invalid regno. | |
331 | */ | |
332 | static int | |
333 | clcdfb_setcolreg(unsigned int regno, unsigned int red, unsigned int green, | |
334 | unsigned int blue, unsigned int transp, struct fb_info *info) | |
335 | { | |
336 | struct clcd_fb *fb = to_clcd(info); | |
337 | ||
338 | if (regno < 16) | |
339 | fb->cmap[regno] = convert_bitfield(transp, &fb->fb.var.transp) | | |
340 | convert_bitfield(blue, &fb->fb.var.blue) | | |
341 | convert_bitfield(green, &fb->fb.var.green) | | |
342 | convert_bitfield(red, &fb->fb.var.red); | |
343 | ||
1ddb8a16 | 344 | if (fb->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR && regno < 256) { |
1da177e4 LT |
345 | int hw_reg = CLCD_PALETTE + ((regno * 2) & ~3); |
346 | u32 val, mask, newval; | |
347 | ||
348 | newval = (red >> 11) & 0x001f; | |
349 | newval |= (green >> 6) & 0x03e0; | |
350 | newval |= (blue >> 1) & 0x7c00; | |
351 | ||
352 | /* | |
353 | * 3.2.11: if we're configured for big endian | |
354 | * byte order, the palette entries are swapped. | |
355 | */ | |
356 | if (fb->clcd_cntl & CNTL_BEBO) | |
357 | regno ^= 1; | |
358 | ||
359 | if (regno & 1) { | |
360 | newval <<= 16; | |
361 | mask = 0x0000ffff; | |
362 | } else { | |
363 | mask = 0xffff0000; | |
364 | } | |
365 | ||
366 | val = readl(fb->regs + hw_reg) & mask; | |
367 | writel(val | newval, fb->regs + hw_reg); | |
368 | } | |
369 | ||
370 | return regno > 255; | |
371 | } | |
372 | ||
373 | /* | |
374 | * Blank the screen if blank_mode != 0, else unblank. If blank == NULL | |
375 | * then the caller blanks by setting the CLUT (Color Look Up Table) to all | |
376 | * black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due | |
377 | * to e.g. a video mode which doesn't support it. Implements VESA suspend | |
378 | * and powerdown modes on hardware that supports disabling hsync/vsync: | |
379 | * blank_mode == 2: suspend vsync | |
380 | * blank_mode == 3: suspend hsync | |
381 | * blank_mode == 4: powerdown | |
382 | */ | |
383 | static int clcdfb_blank(int blank_mode, struct fb_info *info) | |
384 | { | |
385 | struct clcd_fb *fb = to_clcd(info); | |
386 | ||
387 | if (blank_mode != 0) { | |
388 | clcdfb_disable(fb); | |
389 | } else { | |
390 | clcdfb_enable(fb, fb->clcd_cntl); | |
391 | } | |
392 | return 0; | |
393 | } | |
394 | ||
216d526c | 395 | static int clcdfb_mmap(struct fb_info *info, |
1da177e4 LT |
396 | struct vm_area_struct *vma) |
397 | { | |
398 | struct clcd_fb *fb = to_clcd(info); | |
399 | unsigned long len, off = vma->vm_pgoff << PAGE_SHIFT; | |
400 | int ret = -EINVAL; | |
401 | ||
402 | len = info->fix.smem_len; | |
403 | ||
404 | if (off <= len && vma->vm_end - vma->vm_start <= len - off && | |
405 | fb->board->mmap) | |
406 | ret = fb->board->mmap(fb, vma); | |
407 | ||
408 | return ret; | |
409 | } | |
410 | ||
411 | static struct fb_ops clcdfb_ops = { | |
412 | .owner = THIS_MODULE, | |
413 | .fb_check_var = clcdfb_check_var, | |
414 | .fb_set_par = clcdfb_set_par, | |
415 | .fb_setcolreg = clcdfb_setcolreg, | |
416 | .fb_blank = clcdfb_blank, | |
417 | .fb_fillrect = cfb_fillrect, | |
418 | .fb_copyarea = cfb_copyarea, | |
419 | .fb_imageblit = cfb_imageblit, | |
1da177e4 LT |
420 | .fb_mmap = clcdfb_mmap, |
421 | }; | |
422 | ||
423 | static int clcdfb_register(struct clcd_fb *fb) | |
424 | { | |
425 | int ret; | |
426 | ||
3f17522c RK |
427 | /* |
428 | * ARM PL111 always has IENB at 0x1c; it's only PL110 | |
429 | * which is reversed on some platforms. | |
430 | */ | |
431 | if (amba_manf(fb->dev) == 0x41 && amba_part(fb->dev) == 0x111) { | |
432 | fb->off_ienb = CLCD_PL111_IENB; | |
433 | fb->off_cntl = CLCD_PL111_CNTL; | |
434 | } else { | |
435 | #ifdef CONFIG_ARCH_VERSATILE | |
436 | fb->off_ienb = CLCD_PL111_IENB; | |
437 | fb->off_cntl = CLCD_PL111_CNTL; | |
438 | #else | |
439 | fb->off_ienb = CLCD_PL110_IENB; | |
440 | fb->off_cntl = CLCD_PL110_CNTL; | |
441 | #endif | |
442 | } | |
443 | ||
ee569c43 | 444 | fb->clk = clk_get(&fb->dev->dev, NULL); |
1da177e4 LT |
445 | if (IS_ERR(fb->clk)) { |
446 | ret = PTR_ERR(fb->clk); | |
447 | goto out; | |
448 | } | |
449 | ||
99df4ee1 RK |
450 | ret = clk_prepare(fb->clk); |
451 | if (ret) | |
452 | goto free_clk; | |
453 | ||
17e8c4e1 LM |
454 | fb->fb.device = &fb->dev->dev; |
455 | ||
1da177e4 | 456 | fb->fb.fix.mmio_start = fb->dev->res.start; |
dc890c2d | 457 | fb->fb.fix.mmio_len = resource_size(&fb->dev->res); |
1da177e4 LT |
458 | |
459 | fb->regs = ioremap(fb->fb.fix.mmio_start, fb->fb.fix.mmio_len); | |
460 | if (!fb->regs) { | |
461 | printk(KERN_ERR "CLCD: unable to remap registers\n"); | |
462 | ret = -ENOMEM; | |
99df4ee1 | 463 | goto clk_unprep; |
1da177e4 LT |
464 | } |
465 | ||
466 | fb->fb.fbops = &clcdfb_ops; | |
467 | fb->fb.flags = FBINFO_FLAG_DEFAULT; | |
468 | fb->fb.pseudo_palette = fb->cmap; | |
469 | ||
470 | strncpy(fb->fb.fix.id, clcd_name, sizeof(fb->fb.fix.id)); | |
471 | fb->fb.fix.type = FB_TYPE_PACKED_PIXELS; | |
472 | fb->fb.fix.type_aux = 0; | |
473 | fb->fb.fix.xpanstep = 0; | |
474 | fb->fb.fix.ypanstep = 0; | |
475 | fb->fb.fix.ywrapstep = 0; | |
476 | fb->fb.fix.accel = FB_ACCEL_NONE; | |
477 | ||
478 | fb->fb.var.xres = fb->panel->mode.xres; | |
479 | fb->fb.var.yres = fb->panel->mode.yres; | |
480 | fb->fb.var.xres_virtual = fb->panel->mode.xres; | |
481 | fb->fb.var.yres_virtual = fb->panel->mode.yres; | |
482 | fb->fb.var.bits_per_pixel = fb->panel->bpp; | |
483 | fb->fb.var.grayscale = fb->panel->grayscale; | |
484 | fb->fb.var.pixclock = fb->panel->mode.pixclock; | |
485 | fb->fb.var.left_margin = fb->panel->mode.left_margin; | |
486 | fb->fb.var.right_margin = fb->panel->mode.right_margin; | |
487 | fb->fb.var.upper_margin = fb->panel->mode.upper_margin; | |
488 | fb->fb.var.lower_margin = fb->panel->mode.lower_margin; | |
489 | fb->fb.var.hsync_len = fb->panel->mode.hsync_len; | |
490 | fb->fb.var.vsync_len = fb->panel->mode.vsync_len; | |
491 | fb->fb.var.sync = fb->panel->mode.sync; | |
492 | fb->fb.var.vmode = fb->panel->mode.vmode; | |
493 | fb->fb.var.activate = FB_ACTIVATE_NOW; | |
494 | fb->fb.var.nonstd = 0; | |
495 | fb->fb.var.height = fb->panel->height; | |
496 | fb->fb.var.width = fb->panel->width; | |
497 | fb->fb.var.accel_flags = 0; | |
498 | ||
499 | fb->fb.monspecs.hfmin = 0; | |
500 | fb->fb.monspecs.hfmax = 100000; | |
501 | fb->fb.monspecs.vfmin = 0; | |
502 | fb->fb.monspecs.vfmax = 400; | |
503 | fb->fb.monspecs.dclkmin = 1000000; | |
504 | fb->fb.monspecs.dclkmax = 100000000; | |
505 | ||
506 | /* | |
507 | * Make sure that the bitfields are set appropriately. | |
508 | */ | |
509 | clcdfb_set_bitfields(fb, &fb->fb.var); | |
510 | ||
511 | /* | |
512 | * Allocate colourmap. | |
513 | */ | |
909baf00 AS |
514 | ret = fb_alloc_cmap(&fb->fb.cmap, 256, 0); |
515 | if (ret) | |
516 | goto unmap; | |
1da177e4 LT |
517 | |
518 | /* | |
519 | * Ensure interrupts are disabled. | |
520 | */ | |
3f17522c | 521 | writel(0, fb->regs + fb->off_ienb); |
1da177e4 LT |
522 | |
523 | fb_set_var(&fb->fb, &fb->fb.var); | |
524 | ||
ff643322 RK |
525 | dev_info(&fb->dev->dev, "%s hardware, %s display\n", |
526 | fb->board->name, fb->panel->mode.name); | |
1da177e4 LT |
527 | |
528 | ret = register_framebuffer(&fb->fb); | |
529 | if (ret == 0) | |
530 | goto out; | |
531 | ||
532 | printk(KERN_ERR "CLCD: cannot register framebuffer (%d)\n", ret); | |
533 | ||
909baf00 AS |
534 | fb_dealloc_cmap(&fb->fb.cmap); |
535 | unmap: | |
1da177e4 | 536 | iounmap(fb->regs); |
99df4ee1 RK |
537 | clk_unprep: |
538 | clk_unprepare(fb->clk); | |
1da177e4 LT |
539 | free_clk: |
540 | clk_put(fb->clk); | |
541 | out: | |
542 | return ret; | |
543 | } | |
544 | ||
aa25afad | 545 | static int clcdfb_probe(struct amba_device *dev, const struct amba_id *id) |
1da177e4 LT |
546 | { |
547 | struct clcd_board *board = dev->dev.platform_data; | |
548 | struct clcd_fb *fb; | |
549 | int ret; | |
550 | ||
551 | if (!board) | |
552 | return -EINVAL; | |
553 | ||
554 | ret = amba_request_regions(dev, NULL); | |
555 | if (ret) { | |
556 | printk(KERN_ERR "CLCD: unable to reserve regs region\n"); | |
557 | goto out; | |
558 | } | |
559 | ||
dd00cc48 | 560 | fb = kzalloc(sizeof(struct clcd_fb), GFP_KERNEL); |
1da177e4 LT |
561 | if (!fb) { |
562 | printk(KERN_INFO "CLCD: could not allocate new clcd_fb struct\n"); | |
563 | ret = -ENOMEM; | |
564 | goto free_region; | |
565 | } | |
1da177e4 LT |
566 | |
567 | fb->dev = dev; | |
568 | fb->board = board; | |
569 | ||
ff643322 RK |
570 | dev_info(&fb->dev->dev, "PL%03x rev%u at 0x%08llx\n", |
571 | amba_part(dev), amba_rev(dev), | |
572 | (unsigned long long)dev->res.start); | |
573 | ||
1da177e4 LT |
574 | ret = fb->board->setup(fb); |
575 | if (ret) | |
576 | goto free_fb; | |
577 | ||
578 | ret = clcdfb_register(fb); | |
579 | if (ret == 0) { | |
580 | amba_set_drvdata(dev, fb); | |
581 | goto out; | |
582 | } | |
583 | ||
584 | fb->board->remove(fb); | |
585 | free_fb: | |
586 | kfree(fb); | |
587 | free_region: | |
588 | amba_release_regions(dev); | |
589 | out: | |
590 | return ret; | |
591 | } | |
592 | ||
593 | static int clcdfb_remove(struct amba_device *dev) | |
594 | { | |
595 | struct clcd_fb *fb = amba_get_drvdata(dev); | |
596 | ||
597 | amba_set_drvdata(dev, NULL); | |
598 | ||
599 | clcdfb_disable(fb); | |
600 | unregister_framebuffer(&fb->fb); | |
909baf00 AS |
601 | if (fb->fb.cmap.len) |
602 | fb_dealloc_cmap(&fb->fb.cmap); | |
1da177e4 | 603 | iounmap(fb->regs); |
99df4ee1 | 604 | clk_unprepare(fb->clk); |
1da177e4 LT |
605 | clk_put(fb->clk); |
606 | ||
607 | fb->board->remove(fb); | |
608 | ||
609 | kfree(fb); | |
610 | ||
611 | amba_release_regions(dev); | |
612 | ||
613 | return 0; | |
614 | } | |
615 | ||
616 | static struct amba_id clcdfb_id_table[] = { | |
617 | { | |
618 | .id = 0x00041110, | |
e831556f | 619 | .mask = 0x000ffffe, |
1da177e4 LT |
620 | }, |
621 | { 0, 0 }, | |
622 | }; | |
623 | ||
624 | static struct amba_driver clcd_driver = { | |
625 | .drv = { | |
e831556f | 626 | .name = "clcd-pl11x", |
1da177e4 LT |
627 | }, |
628 | .probe = clcdfb_probe, | |
629 | .remove = clcdfb_remove, | |
630 | .id_table = clcdfb_id_table, | |
631 | }; | |
632 | ||
2c250134 | 633 | static int __init amba_clcdfb_init(void) |
1da177e4 LT |
634 | { |
635 | if (fb_get_options("ambafb", NULL)) | |
636 | return -ENODEV; | |
637 | ||
638 | return amba_driver_register(&clcd_driver); | |
639 | } | |
640 | ||
641 | module_init(amba_clcdfb_init); | |
642 | ||
643 | static void __exit amba_clcdfb_exit(void) | |
644 | { | |
645 | amba_driver_unregister(&clcd_driver); | |
646 | } | |
647 | ||
648 | module_exit(amba_clcdfb_exit); | |
649 | ||
650 | MODULE_DESCRIPTION("ARM PrimeCell PL110 CLCD core driver"); | |
651 | MODULE_LICENSE("GPL"); |