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7caa4342 DHG |
1 | /* |
2 | * SuperH Mobile MERAM Driver for SuperH Mobile LCDC Driver | |
3 | * | |
4 | * Copyright (c) 2011 Damian Hobson-Garcia <dhobsong@igel.co.jp> | |
5 | * Takanari Hayama <taki@igel.co.jp> | |
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 | ||
12 | #include <linux/kernel.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/device.h> | |
17673778 | 15 | #include <linux/pm_runtime.h> |
7caa4342 DHG |
16 | #include <linux/io.h> |
17 | #include <linux/slab.h> | |
18 | #include <linux/platform_device.h> | |
19 | ||
20 | #include "sh_mobile_meram.h" | |
21 | ||
22 | /* meram registers */ | |
23 | #define MExxCTL 0x0 | |
24 | #define MExxBSIZE 0x4 | |
25 | #define MExxMNCF 0x8 | |
26 | #define MExxSARA 0x10 | |
27 | #define MExxSARB 0x14 | |
28 | #define MExxSBSIZE 0x18 | |
29 | ||
30 | #define MERAM_MExxCTL_VAL(ctl, next_icb, addr) \ | |
31 | ((ctl) | (((next_icb) & 0x1f) << 11) | (((addr) & 0x7ff) << 16)) | |
32 | #define MERAM_MExxBSIZE_VAL(a, b, c) \ | |
33 | (((a) << 28) | ((b) << 16) | (c)) | |
34 | ||
35 | #define MEVCR1 0x4 | |
36 | #define MEACTS 0x10 | |
37 | #define MEQSEL1 0x40 | |
38 | #define MEQSEL2 0x44 | |
39 | ||
0aa492be DHG |
40 | struct sh_mobile_meram_priv { |
41 | void __iomem *base; | |
42 | struct mutex lock; | |
43 | unsigned long used_icb; | |
44 | int used_meram_cache_regions; | |
45 | unsigned long used_meram_cache[SH_MOBILE_MERAM_ICB_NUM]; | |
46 | }; | |
47 | ||
7caa4342 DHG |
48 | /* settings */ |
49 | #define MERAM_SEC_LINE 15 | |
50 | #define MERAM_LINE_WIDTH 2048 | |
51 | ||
52 | /* | |
53 | * MERAM/ICB access functions | |
54 | */ | |
55 | ||
56 | #define MERAM_ICB_OFFSET(base, idx, off) \ | |
57 | ((base) + (0x400 + ((idx) * 0x20) + (off))) | |
58 | ||
59 | static inline void meram_write_icb(void __iomem *base, int idx, int off, | |
60 | unsigned long val) | |
61 | { | |
62 | iowrite32(val, MERAM_ICB_OFFSET(base, idx, off)); | |
63 | } | |
64 | ||
65 | static inline unsigned long meram_read_icb(void __iomem *base, int idx, int off) | |
66 | { | |
67 | return ioread32(MERAM_ICB_OFFSET(base, idx, off)); | |
68 | } | |
69 | ||
70 | static inline void meram_write_reg(void __iomem *base, int off, | |
71 | unsigned long val) | |
72 | { | |
73 | iowrite32(val, base + off); | |
74 | } | |
75 | ||
76 | static inline unsigned long meram_read_reg(void __iomem *base, int off) | |
77 | { | |
78 | return ioread32(base + off); | |
79 | } | |
80 | ||
81 | /* | |
82 | * register ICB | |
83 | */ | |
84 | ||
85 | #define MERAM_CACHE_START(p) ((p) >> 16) | |
86 | #define MERAM_CACHE_END(p) ((p) & 0xffff) | |
87 | #define MERAM_CACHE_SET(o, s) ((((o) & 0xffff) << 16) | \ | |
88 | (((o) + (s) - 1) & 0xffff)) | |
89 | ||
90 | /* | |
91 | * check if there's no overlaps in MERAM allocation. | |
92 | */ | |
93 | ||
94 | static inline int meram_check_overlap(struct sh_mobile_meram_priv *priv, | |
95 | struct sh_mobile_meram_icb *new) | |
96 | { | |
97 | int i; | |
98 | int used_start, used_end, meram_start, meram_end; | |
99 | ||
100 | /* valid ICB? */ | |
101 | if (new->marker_icb & ~0x1f || new->cache_icb & ~0x1f) | |
102 | return 1; | |
103 | ||
104 | if (test_bit(new->marker_icb, &priv->used_icb) || | |
105 | test_bit(new->cache_icb, &priv->used_icb)) | |
106 | return 1; | |
107 | ||
108 | for (i = 0; i < priv->used_meram_cache_regions; i++) { | |
109 | used_start = MERAM_CACHE_START(priv->used_meram_cache[i]); | |
110 | used_end = MERAM_CACHE_END(priv->used_meram_cache[i]); | |
111 | meram_start = new->meram_offset; | |
112 | meram_end = new->meram_offset + new->meram_size; | |
113 | ||
114 | if ((meram_start >= used_start && meram_start < used_end) || | |
115 | (meram_end > used_start && meram_end < used_end)) | |
116 | return 1; | |
117 | } | |
118 | ||
119 | return 0; | |
120 | } | |
121 | ||
122 | /* | |
123 | * mark the specified ICB as used | |
124 | */ | |
125 | ||
126 | static inline void meram_mark(struct sh_mobile_meram_priv *priv, | |
127 | struct sh_mobile_meram_icb *new) | |
128 | { | |
129 | int n; | |
130 | ||
131 | if (new->marker_icb < 0 || new->cache_icb < 0) | |
132 | return; | |
133 | ||
134 | __set_bit(new->marker_icb, &priv->used_icb); | |
135 | __set_bit(new->cache_icb, &priv->used_icb); | |
136 | ||
137 | n = priv->used_meram_cache_regions; | |
138 | ||
139 | priv->used_meram_cache[n] = MERAM_CACHE_SET(new->meram_offset, | |
140 | new->meram_size); | |
141 | ||
142 | priv->used_meram_cache_regions++; | |
143 | } | |
144 | ||
145 | /* | |
146 | * unmark the specified ICB as used | |
147 | */ | |
148 | ||
149 | static inline void meram_unmark(struct sh_mobile_meram_priv *priv, | |
150 | struct sh_mobile_meram_icb *icb) | |
151 | { | |
152 | int i; | |
153 | unsigned long pattern; | |
154 | ||
155 | if (icb->marker_icb < 0 || icb->cache_icb < 0) | |
156 | return; | |
157 | ||
158 | __clear_bit(icb->marker_icb, &priv->used_icb); | |
159 | __clear_bit(icb->cache_icb, &priv->used_icb); | |
160 | ||
161 | pattern = MERAM_CACHE_SET(icb->meram_offset, icb->meram_size); | |
162 | for (i = 0; i < priv->used_meram_cache_regions; i++) { | |
163 | if (priv->used_meram_cache[i] == pattern) { | |
164 | while (i < priv->used_meram_cache_regions - 1) { | |
165 | priv->used_meram_cache[i] = | |
166 | priv->used_meram_cache[i + 1] ; | |
167 | i++; | |
168 | } | |
169 | priv->used_meram_cache[i] = 0; | |
170 | priv->used_meram_cache_regions--; | |
171 | break; | |
172 | } | |
173 | } | |
174 | } | |
175 | ||
3fedd2ac DHG |
176 | /* |
177 | * is this a YCbCr(NV12, NV16 or NV24) colorspace | |
178 | */ | |
179 | static inline int is_nvcolor(int cspace) | |
180 | { | |
181 | if (cspace == SH_MOBILE_MERAM_PF_NV || | |
182 | cspace == SH_MOBILE_MERAM_PF_NV24) | |
183 | return 1; | |
184 | return 0; | |
185 | } | |
7caa4342 DHG |
186 | |
187 | /* | |
188 | * set the next address to fetch | |
189 | */ | |
190 | static inline void meram_set_next_addr(struct sh_mobile_meram_priv *priv, | |
191 | struct sh_mobile_meram_cfg *cfg, | |
192 | unsigned long base_addr_y, | |
193 | unsigned long base_addr_c) | |
194 | { | |
195 | unsigned long target; | |
196 | ||
197 | target = (cfg->current_reg) ? MExxSARA : MExxSARB; | |
198 | cfg->current_reg ^= 1; | |
199 | ||
200 | /* set the next address to fetch */ | |
201 | meram_write_icb(priv->base, cfg->icb[0].cache_icb, target, | |
202 | base_addr_y); | |
203 | meram_write_icb(priv->base, cfg->icb[0].marker_icb, target, | |
204 | base_addr_y + cfg->icb[0].cache_unit); | |
205 | ||
3fedd2ac | 206 | if (is_nvcolor(cfg->pixelformat)) { |
7caa4342 DHG |
207 | meram_write_icb(priv->base, cfg->icb[1].cache_icb, target, |
208 | base_addr_c); | |
209 | meram_write_icb(priv->base, cfg->icb[1].marker_icb, target, | |
210 | base_addr_c + cfg->icb[1].cache_unit); | |
211 | } | |
212 | } | |
213 | ||
214 | /* | |
215 | * get the next ICB address | |
216 | */ | |
217 | static inline void meram_get_next_icb_addr(struct sh_mobile_meram_info *pdata, | |
218 | struct sh_mobile_meram_cfg *cfg, | |
219 | unsigned long *icb_addr_y, | |
220 | unsigned long *icb_addr_c) | |
221 | { | |
222 | unsigned long icb_offset; | |
223 | ||
224 | if (pdata->addr_mode == SH_MOBILE_MERAM_MODE0) | |
225 | icb_offset = 0x80000000 | (cfg->current_reg << 29); | |
226 | else | |
227 | icb_offset = 0xc0000000 | (cfg->current_reg << 23); | |
228 | ||
229 | *icb_addr_y = icb_offset | (cfg->icb[0].marker_icb << 24); | |
06c8a6a3 | 230 | if (is_nvcolor(cfg->pixelformat)) |
7caa4342 DHG |
231 | *icb_addr_c = icb_offset | (cfg->icb[1].marker_icb << 24); |
232 | } | |
233 | ||
234 | #define MERAM_CALC_BYTECOUNT(x, y) \ | |
235 | (((x) * (y) + (MERAM_LINE_WIDTH - 1)) & ~(MERAM_LINE_WIDTH - 1)) | |
236 | ||
237 | /* | |
238 | * initialize MERAM | |
239 | */ | |
240 | ||
241 | static int meram_init(struct sh_mobile_meram_priv *priv, | |
242 | struct sh_mobile_meram_icb *icb, | |
243 | int xres, int yres, int *out_pitch) | |
244 | { | |
245 | unsigned long total_byte_count = MERAM_CALC_BYTECOUNT(xres, yres); | |
246 | unsigned long bnm; | |
247 | int lcdc_pitch, xpitch, line_cnt; | |
248 | int save_lines; | |
249 | ||
250 | /* adjust pitch to 1024, 2048, 4096 or 8192 */ | |
251 | lcdc_pitch = (xres - 1) | 1023; | |
252 | lcdc_pitch = lcdc_pitch | (lcdc_pitch >> 1); | |
253 | lcdc_pitch = lcdc_pitch | (lcdc_pitch >> 2); | |
254 | lcdc_pitch += 1; | |
255 | ||
256 | /* derive settings */ | |
257 | if (lcdc_pitch == 8192 && yres >= 1024) { | |
258 | lcdc_pitch = xpitch = MERAM_LINE_WIDTH; | |
259 | line_cnt = total_byte_count >> 11; | |
260 | *out_pitch = xres; | |
261 | save_lines = (icb->meram_size / 16 / MERAM_SEC_LINE); | |
262 | save_lines *= MERAM_SEC_LINE; | |
263 | } else { | |
264 | xpitch = xres; | |
265 | line_cnt = yres; | |
266 | *out_pitch = lcdc_pitch; | |
267 | save_lines = icb->meram_size / (lcdc_pitch >> 10) / 2; | |
268 | save_lines &= 0xff; | |
269 | } | |
270 | bnm = (save_lines - 1) << 16; | |
271 | ||
272 | /* TODO: we better to check if we have enough MERAM buffer size */ | |
273 | ||
274 | /* set up ICB */ | |
275 | meram_write_icb(priv->base, icb->cache_icb, MExxBSIZE, | |
276 | MERAM_MExxBSIZE_VAL(0x0, line_cnt - 1, xpitch - 1)); | |
277 | meram_write_icb(priv->base, icb->marker_icb, MExxBSIZE, | |
278 | MERAM_MExxBSIZE_VAL(0xf, line_cnt - 1, xpitch - 1)); | |
279 | ||
280 | meram_write_icb(priv->base, icb->cache_icb, MExxMNCF, bnm); | |
281 | meram_write_icb(priv->base, icb->marker_icb, MExxMNCF, bnm); | |
282 | ||
283 | meram_write_icb(priv->base, icb->cache_icb, MExxSBSIZE, xpitch); | |
284 | meram_write_icb(priv->base, icb->marker_icb, MExxSBSIZE, xpitch); | |
285 | ||
286 | /* save a cache unit size */ | |
287 | icb->cache_unit = xres * save_lines; | |
288 | ||
289 | /* | |
290 | * Set MERAM for framebuffer | |
291 | * | |
292 | * 0x70f: WD = 0x3, WS=0x1, CM=0x1, MD=FB mode | |
293 | * we also chain the cache_icb and the marker_icb. | |
294 | * we also split the allocated MERAM buffer between two ICBs. | |
295 | */ | |
296 | meram_write_icb(priv->base, icb->cache_icb, MExxCTL, | |
297 | MERAM_MExxCTL_VAL(0x70f, icb->marker_icb, | |
298 | icb->meram_offset)); | |
299 | meram_write_icb(priv->base, icb->marker_icb, MExxCTL, | |
300 | MERAM_MExxCTL_VAL(0x70f, icb->cache_icb, | |
301 | icb->meram_offset + | |
302 | icb->meram_size / 2)); | |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
307 | static void meram_deinit(struct sh_mobile_meram_priv *priv, | |
308 | struct sh_mobile_meram_icb *icb) | |
309 | { | |
310 | /* disable ICB */ | |
311 | meram_write_icb(priv->base, icb->cache_icb, MExxCTL, 0); | |
312 | meram_write_icb(priv->base, icb->marker_icb, MExxCTL, 0); | |
313 | icb->cache_unit = 0; | |
314 | } | |
315 | ||
316 | /* | |
317 | * register the ICB | |
318 | */ | |
319 | ||
320 | static int sh_mobile_meram_register(struct sh_mobile_meram_info *pdata, | |
321 | struct sh_mobile_meram_cfg *cfg, | |
322 | int xres, int yres, int pixelformat, | |
323 | unsigned long base_addr_y, | |
324 | unsigned long base_addr_c, | |
325 | unsigned long *icb_addr_y, | |
326 | unsigned long *icb_addr_c, | |
327 | int *pitch) | |
328 | { | |
329 | struct platform_device *pdev; | |
330 | struct sh_mobile_meram_priv *priv; | |
331 | int n, out_pitch; | |
332 | int error = 0; | |
333 | ||
334 | if (!pdata || !pdata->priv || !pdata->pdev || !cfg) | |
335 | return -EINVAL; | |
336 | ||
337 | if (pixelformat != SH_MOBILE_MERAM_PF_NV && | |
3fedd2ac | 338 | pixelformat != SH_MOBILE_MERAM_PF_NV24 && |
7caa4342 DHG |
339 | pixelformat != SH_MOBILE_MERAM_PF_RGB) |
340 | return -EINVAL; | |
341 | ||
342 | priv = pdata->priv; | |
343 | pdev = pdata->pdev; | |
344 | ||
345 | dev_dbg(&pdev->dev, "registering %dx%d (%s) (y=%08lx, c=%08lx)", | |
346 | xres, yres, (!pixelformat) ? "yuv" : "rgb", | |
347 | base_addr_y, base_addr_c); | |
348 | ||
349 | mutex_lock(&priv->lock); | |
350 | ||
351 | /* we can't handle wider than 8192px */ | |
352 | if (xres > 8192) { | |
353 | dev_err(&pdev->dev, "width exceeding the limit (> 8192)."); | |
354 | error = -EINVAL; | |
355 | goto err; | |
356 | } | |
357 | ||
358 | if (priv->used_meram_cache_regions + 2 > SH_MOBILE_MERAM_ICB_NUM) { | |
359 | dev_err(&pdev->dev, "no more ICB available."); | |
360 | error = -EINVAL; | |
361 | goto err; | |
362 | } | |
363 | ||
364 | /* do we have at least one ICB config? */ | |
365 | if (cfg->icb[0].marker_icb < 0 || cfg->icb[0].cache_icb < 0) { | |
366 | dev_err(&pdev->dev, "at least one ICB is required."); | |
367 | error = -EINVAL; | |
368 | goto err; | |
369 | } | |
370 | ||
371 | /* make sure that there's no overlaps */ | |
372 | if (meram_check_overlap(priv, &cfg->icb[0])) { | |
373 | dev_err(&pdev->dev, "conflicting config detected."); | |
374 | error = -EINVAL; | |
375 | goto err; | |
376 | } | |
377 | n = 1; | |
378 | ||
379 | /* do the same if we have the second ICB set */ | |
380 | if (cfg->icb[1].marker_icb >= 0 && cfg->icb[1].cache_icb >= 0) { | |
381 | if (meram_check_overlap(priv, &cfg->icb[1])) { | |
382 | dev_err(&pdev->dev, "conflicting config detected."); | |
383 | error = -EINVAL; | |
384 | goto err; | |
385 | } | |
386 | n = 2; | |
387 | } | |
388 | ||
3fedd2ac | 389 | if (is_nvcolor(pixelformat) && n != 2) { |
7caa4342 DHG |
390 | dev_err(&pdev->dev, "requires two ICB sets for planar Y/C."); |
391 | error = -EINVAL; | |
392 | goto err; | |
393 | } | |
394 | ||
395 | /* we now register the ICB */ | |
396 | cfg->pixelformat = pixelformat; | |
397 | meram_mark(priv, &cfg->icb[0]); | |
3fedd2ac | 398 | if (is_nvcolor(pixelformat)) |
7caa4342 DHG |
399 | meram_mark(priv, &cfg->icb[1]); |
400 | ||
401 | /* initialize MERAM */ | |
402 | meram_init(priv, &cfg->icb[0], xres, yres, &out_pitch); | |
403 | *pitch = out_pitch; | |
404 | if (pixelformat == SH_MOBILE_MERAM_PF_NV) | |
405 | meram_init(priv, &cfg->icb[1], xres, (yres + 1) / 2, | |
406 | &out_pitch); | |
3fedd2ac DHG |
407 | else if (pixelformat == SH_MOBILE_MERAM_PF_NV24) |
408 | meram_init(priv, &cfg->icb[1], 2 * xres, (yres + 1) / 2, | |
409 | &out_pitch); | |
7caa4342 DHG |
410 | |
411 | cfg->current_reg = 1; | |
412 | meram_set_next_addr(priv, cfg, base_addr_y, base_addr_c); | |
413 | meram_get_next_icb_addr(pdata, cfg, icb_addr_y, icb_addr_c); | |
414 | ||
415 | dev_dbg(&pdev->dev, "registered - can access via y=%08lx, c=%08lx", | |
416 | *icb_addr_y, *icb_addr_c); | |
417 | ||
418 | err: | |
419 | mutex_unlock(&priv->lock); | |
420 | return error; | |
421 | } | |
422 | ||
423 | static int sh_mobile_meram_unregister(struct sh_mobile_meram_info *pdata, | |
424 | struct sh_mobile_meram_cfg *cfg) | |
425 | { | |
426 | struct sh_mobile_meram_priv *priv; | |
427 | ||
428 | if (!pdata || !pdata->priv || !cfg) | |
429 | return -EINVAL; | |
430 | ||
431 | priv = pdata->priv; | |
432 | ||
433 | mutex_lock(&priv->lock); | |
434 | ||
435 | /* deinit & unmark */ | |
3fedd2ac | 436 | if (is_nvcolor(cfg->pixelformat)) { |
7caa4342 DHG |
437 | meram_deinit(priv, &cfg->icb[1]); |
438 | meram_unmark(priv, &cfg->icb[1]); | |
439 | } | |
440 | meram_deinit(priv, &cfg->icb[0]); | |
441 | meram_unmark(priv, &cfg->icb[0]); | |
442 | ||
443 | mutex_unlock(&priv->lock); | |
444 | ||
445 | return 0; | |
446 | } | |
447 | ||
448 | static int sh_mobile_meram_update(struct sh_mobile_meram_info *pdata, | |
449 | struct sh_mobile_meram_cfg *cfg, | |
450 | unsigned long base_addr_y, | |
451 | unsigned long base_addr_c, | |
452 | unsigned long *icb_addr_y, | |
453 | unsigned long *icb_addr_c) | |
454 | { | |
455 | struct sh_mobile_meram_priv *priv; | |
456 | ||
457 | if (!pdata || !pdata->priv || !cfg) | |
458 | return -EINVAL; | |
459 | ||
460 | priv = pdata->priv; | |
461 | ||
462 | mutex_lock(&priv->lock); | |
463 | ||
464 | meram_set_next_addr(priv, cfg, base_addr_y, base_addr_c); | |
465 | meram_get_next_icb_addr(pdata, cfg, icb_addr_y, icb_addr_c); | |
466 | ||
467 | mutex_unlock(&priv->lock); | |
468 | ||
469 | return 0; | |
470 | } | |
471 | ||
472 | static struct sh_mobile_meram_ops sh_mobile_meram_ops = { | |
473 | .module = THIS_MODULE, | |
474 | .meram_register = sh_mobile_meram_register, | |
475 | .meram_unregister = sh_mobile_meram_unregister, | |
476 | .meram_update = sh_mobile_meram_update, | |
477 | }; | |
478 | ||
479 | /* | |
480 | * initialize MERAM | |
481 | */ | |
482 | ||
483 | static int sh_mobile_meram_remove(struct platform_device *pdev); | |
484 | ||
485 | static int __devinit sh_mobile_meram_probe(struct platform_device *pdev) | |
486 | { | |
487 | struct sh_mobile_meram_priv *priv; | |
488 | struct sh_mobile_meram_info *pdata = pdev->dev.platform_data; | |
489 | struct resource *res; | |
490 | int error; | |
491 | ||
492 | if (!pdata) { | |
493 | dev_err(&pdev->dev, "no platform data defined\n"); | |
494 | return -EINVAL; | |
495 | } | |
496 | ||
497 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
498 | if (!res) { | |
499 | dev_err(&pdev->dev, "cannot get platform resources\n"); | |
500 | return -ENOENT; | |
501 | } | |
502 | ||
503 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
504 | if (!priv) { | |
505 | dev_err(&pdev->dev, "cannot allocate device data\n"); | |
506 | return -ENOMEM; | |
507 | } | |
508 | ||
509 | platform_set_drvdata(pdev, priv); | |
510 | ||
511 | /* initialize private data */ | |
512 | mutex_init(&priv->lock); | |
513 | priv->base = ioremap_nocache(res->start, resource_size(res)); | |
514 | if (!priv->base) { | |
515 | dev_err(&pdev->dev, "ioremap failed\n"); | |
516 | error = -EFAULT; | |
517 | goto err; | |
518 | } | |
519 | pdata->ops = &sh_mobile_meram_ops; | |
520 | pdata->priv = priv; | |
521 | pdata->pdev = pdev; | |
522 | ||
523 | /* initialize ICB addressing mode */ | |
524 | if (pdata->addr_mode == SH_MOBILE_MERAM_MODE1) | |
525 | meram_write_reg(priv->base, MEVCR1, 1 << 29); | |
526 | ||
17673778 DHG |
527 | pm_runtime_enable(&pdev->dev); |
528 | ||
7caa4342 DHG |
529 | dev_info(&pdev->dev, "sh_mobile_meram initialized."); |
530 | ||
531 | return 0; | |
532 | ||
533 | err: | |
534 | sh_mobile_meram_remove(pdev); | |
535 | ||
536 | return error; | |
537 | } | |
538 | ||
539 | ||
540 | static int sh_mobile_meram_remove(struct platform_device *pdev) | |
541 | { | |
542 | struct sh_mobile_meram_priv *priv = platform_get_drvdata(pdev); | |
543 | ||
17673778 DHG |
544 | pm_runtime_disable(&pdev->dev); |
545 | ||
7caa4342 DHG |
546 | if (priv->base) |
547 | iounmap(priv->base); | |
548 | ||
549 | mutex_destroy(&priv->lock); | |
550 | ||
551 | kfree(priv); | |
552 | ||
553 | return 0; | |
554 | } | |
555 | ||
556 | static struct platform_driver sh_mobile_meram_driver = { | |
557 | .driver = { | |
558 | .name = "sh_mobile_meram", | |
559 | .owner = THIS_MODULE, | |
560 | }, | |
561 | .probe = sh_mobile_meram_probe, | |
562 | .remove = sh_mobile_meram_remove, | |
563 | }; | |
564 | ||
565 | static int __init sh_mobile_meram_init(void) | |
566 | { | |
567 | return platform_driver_register(&sh_mobile_meram_driver); | |
568 | } | |
569 | ||
570 | static void __exit sh_mobile_meram_exit(void) | |
571 | { | |
572 | platform_driver_unregister(&sh_mobile_meram_driver); | |
573 | } | |
574 | ||
575 | module_init(sh_mobile_meram_init); | |
576 | module_exit(sh_mobile_meram_exit); | |
577 | ||
578 | MODULE_DESCRIPTION("SuperH Mobile MERAM driver"); | |
579 | MODULE_AUTHOR("Damian Hobson-Garcia / Takanari Hayama"); | |
580 | MODULE_LICENSE("GPL v2"); |