Commit | Line | Data |
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7caa4342 D |
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 D |
16 | #include <linux/io.h> |
17 | #include <linux/slab.h> | |
18 | #include <linux/platform_device.h> | |
8a20974f | 19 | #include <video/sh_mobile_meram.h> |
7caa4342 D |
20 | |
21 | /* meram registers */ | |
f0a260fe LP |
22 | #define MEVCR1 0x4 |
23 | #define MEVCR1_RST (1 << 31) | |
24 | #define MEVCR1_WD (1 << 30) | |
25 | #define MEVCR1_AMD1 (1 << 29) | |
26 | #define MEVCR1_AMD0 (1 << 28) | |
27 | #define MEQSEL1 0x40 | |
28 | #define MEQSEL2 0x44 | |
29 | ||
30 | #define MExxCTL 0x400 | |
31 | #define MExxCTL_BV (1 << 31) | |
32 | #define MExxCTL_BSZ_SHIFT 28 | |
33 | #define MExxCTL_MSAR_MASK (0x7ff << MExxCTL_MSAR_SHIFT) | |
34 | #define MExxCTL_MSAR_SHIFT 16 | |
35 | #define MExxCTL_NXT_MASK (0x1f << MExxCTL_NXT_SHIFT) | |
36 | #define MExxCTL_NXT_SHIFT 11 | |
37 | #define MExxCTL_WD1 (1 << 10) | |
38 | #define MExxCTL_WD0 (1 << 9) | |
39 | #define MExxCTL_WS (1 << 8) | |
40 | #define MExxCTL_CB (1 << 7) | |
41 | #define MExxCTL_WBF (1 << 6) | |
42 | #define MExxCTL_WF (1 << 5) | |
43 | #define MExxCTL_RF (1 << 4) | |
44 | #define MExxCTL_CM (1 << 3) | |
45 | #define MExxCTL_MD_READ (1 << 0) | |
46 | #define MExxCTL_MD_WRITE (2 << 0) | |
47 | #define MExxCTL_MD_ICB_WB (3 << 0) | |
48 | #define MExxCTL_MD_ICB (4 << 0) | |
49 | #define MExxCTL_MD_FB (7 << 0) | |
50 | #define MExxCTL_MD_MASK (7 << 0) | |
51 | #define MExxBSIZE 0x404 | |
52 | #define MExxBSIZE_RCNT_SHIFT 28 | |
53 | #define MExxBSIZE_YSZM1_SHIFT 16 | |
54 | #define MExxBSIZE_XSZM1_SHIFT 0 | |
55 | #define MExxMNCF 0x408 | |
56 | #define MExxMNCF_KWBNM_SHIFT 28 | |
57 | #define MExxMNCF_KRBNM_SHIFT 24 | |
58 | #define MExxMNCF_BNM_SHIFT 16 | |
59 | #define MExxMNCF_XBV (1 << 15) | |
60 | #define MExxMNCF_CPL_YCBCR444 (1 << 12) | |
61 | #define MExxMNCF_CPL_YCBCR420 (2 << 12) | |
62 | #define MExxMNCF_CPL_YCBCR422 (3 << 12) | |
63 | #define MExxMNCF_CPL_MSK (3 << 12) | |
64 | #define MExxMNCF_BL (1 << 2) | |
65 | #define MExxMNCF_LNM_SHIFT 0 | |
66 | #define MExxSARA 0x410 | |
67 | #define MExxSARB 0x414 | |
68 | #define MExxSBSIZE 0x418 | |
69 | #define MExxSBSIZE_HDV (1 << 31) | |
70 | #define MExxSBSIZE_HSZ16 (0 << 28) | |
71 | #define MExxSBSIZE_HSZ32 (1 << 28) | |
72 | #define MExxSBSIZE_HSZ64 (2 << 28) | |
73 | #define MExxSBSIZE_HSZ128 (3 << 28) | |
74 | #define MExxSBSIZE_SBSIZZ_SHIFT 0 | |
75 | ||
76 | #define MERAM_MExxCTL_VAL(next, addr) \ | |
77 | ((((next) << MExxCTL_NXT_SHIFT) & MExxCTL_NXT_MASK) | \ | |
78 | (((addr) << MExxCTL_MSAR_SHIFT) & MExxCTL_MSAR_MASK)) | |
79 | #define MERAM_MExxBSIZE_VAL(rcnt, yszm1, xszm1) \ | |
80 | (((rcnt) << MExxBSIZE_RCNT_SHIFT) | \ | |
81 | ((yszm1) << MExxBSIZE_YSZM1_SHIFT) | \ | |
82 | ((xszm1) << MExxBSIZE_XSZM1_SHIFT)) | |
7caa4342 | 83 | |
8a20974f LP |
84 | #define SH_MOBILE_MERAM_ICB_NUM 32 |
85 | ||
0b3bb77c DHG |
86 | static unsigned long common_regs[] = { |
87 | MEVCR1, | |
88 | MEQSEL1, | |
89 | MEQSEL2, | |
90 | }; | |
91 | #define CMN_REGS_SIZE ARRAY_SIZE(common_regs) | |
92 | ||
93 | static unsigned long icb_regs[] = { | |
94 | MExxCTL, | |
95 | MExxBSIZE, | |
96 | MExxMNCF, | |
97 | MExxSARA, | |
98 | MExxSARB, | |
99 | MExxSBSIZE, | |
100 | }; | |
101 | #define ICB_REGS_SIZE ARRAY_SIZE(icb_regs) | |
102 | ||
0aa492be DHG |
103 | struct sh_mobile_meram_priv { |
104 | void __iomem *base; | |
105 | struct mutex lock; | |
106 | unsigned long used_icb; | |
107 | int used_meram_cache_regions; | |
108 | unsigned long used_meram_cache[SH_MOBILE_MERAM_ICB_NUM]; | |
0b3bb77c DHG |
109 | unsigned long cmn_saved_regs[CMN_REGS_SIZE]; |
110 | unsigned long icb_saved_regs[ICB_REGS_SIZE * SH_MOBILE_MERAM_ICB_NUM]; | |
0aa492be DHG |
111 | }; |
112 | ||
7caa4342 D |
113 | /* settings */ |
114 | #define MERAM_SEC_LINE 15 | |
115 | #define MERAM_LINE_WIDTH 2048 | |
116 | ||
117 | /* | |
118 | * MERAM/ICB access functions | |
119 | */ | |
120 | ||
f0a260fe | 121 | #define MERAM_ICB_OFFSET(base, idx, off) ((base) + (off) + (idx) * 0x20) |
7caa4342 D |
122 | |
123 | static inline void meram_write_icb(void __iomem *base, int idx, int off, | |
124 | unsigned long val) | |
125 | { | |
126 | iowrite32(val, MERAM_ICB_OFFSET(base, idx, off)); | |
127 | } | |
128 | ||
129 | static inline unsigned long meram_read_icb(void __iomem *base, int idx, int off) | |
130 | { | |
131 | return ioread32(MERAM_ICB_OFFSET(base, idx, off)); | |
132 | } | |
133 | ||
134 | static inline void meram_write_reg(void __iomem *base, int off, | |
135 | unsigned long val) | |
136 | { | |
137 | iowrite32(val, base + off); | |
138 | } | |
139 | ||
140 | static inline unsigned long meram_read_reg(void __iomem *base, int off) | |
141 | { | |
142 | return ioread32(base + off); | |
143 | } | |
144 | ||
145 | /* | |
146 | * register ICB | |
147 | */ | |
148 | ||
149 | #define MERAM_CACHE_START(p) ((p) >> 16) | |
150 | #define MERAM_CACHE_END(p) ((p) & 0xffff) | |
151 | #define MERAM_CACHE_SET(o, s) ((((o) & 0xffff) << 16) | \ | |
152 | (((o) + (s) - 1) & 0xffff)) | |
153 | ||
154 | /* | |
155 | * check if there's no overlaps in MERAM allocation. | |
156 | */ | |
157 | ||
158 | static inline int meram_check_overlap(struct sh_mobile_meram_priv *priv, | |
159 | struct sh_mobile_meram_icb *new) | |
160 | { | |
161 | int i; | |
162 | int used_start, used_end, meram_start, meram_end; | |
163 | ||
164 | /* valid ICB? */ | |
165 | if (new->marker_icb & ~0x1f || new->cache_icb & ~0x1f) | |
166 | return 1; | |
167 | ||
168 | if (test_bit(new->marker_icb, &priv->used_icb) || | |
169 | test_bit(new->cache_icb, &priv->used_icb)) | |
170 | return 1; | |
171 | ||
172 | for (i = 0; i < priv->used_meram_cache_regions; i++) { | |
173 | used_start = MERAM_CACHE_START(priv->used_meram_cache[i]); | |
174 | used_end = MERAM_CACHE_END(priv->used_meram_cache[i]); | |
175 | meram_start = new->meram_offset; | |
176 | meram_end = new->meram_offset + new->meram_size; | |
177 | ||
178 | if ((meram_start >= used_start && meram_start < used_end) || | |
179 | (meram_end > used_start && meram_end < used_end)) | |
180 | return 1; | |
181 | } | |
182 | ||
183 | return 0; | |
184 | } | |
185 | ||
186 | /* | |
187 | * mark the specified ICB as used | |
188 | */ | |
189 | ||
190 | static inline void meram_mark(struct sh_mobile_meram_priv *priv, | |
191 | struct sh_mobile_meram_icb *new) | |
192 | { | |
193 | int n; | |
194 | ||
195 | if (new->marker_icb < 0 || new->cache_icb < 0) | |
196 | return; | |
197 | ||
198 | __set_bit(new->marker_icb, &priv->used_icb); | |
199 | __set_bit(new->cache_icb, &priv->used_icb); | |
200 | ||
201 | n = priv->used_meram_cache_regions; | |
202 | ||
203 | priv->used_meram_cache[n] = MERAM_CACHE_SET(new->meram_offset, | |
204 | new->meram_size); | |
205 | ||
206 | priv->used_meram_cache_regions++; | |
207 | } | |
208 | ||
209 | /* | |
210 | * unmark the specified ICB as used | |
211 | */ | |
212 | ||
213 | static inline void meram_unmark(struct sh_mobile_meram_priv *priv, | |
214 | struct sh_mobile_meram_icb *icb) | |
215 | { | |
216 | int i; | |
217 | unsigned long pattern; | |
218 | ||
219 | if (icb->marker_icb < 0 || icb->cache_icb < 0) | |
220 | return; | |
221 | ||
222 | __clear_bit(icb->marker_icb, &priv->used_icb); | |
223 | __clear_bit(icb->cache_icb, &priv->used_icb); | |
224 | ||
225 | pattern = MERAM_CACHE_SET(icb->meram_offset, icb->meram_size); | |
226 | for (i = 0; i < priv->used_meram_cache_regions; i++) { | |
227 | if (priv->used_meram_cache[i] == pattern) { | |
228 | while (i < priv->used_meram_cache_regions - 1) { | |
229 | priv->used_meram_cache[i] = | |
230 | priv->used_meram_cache[i + 1] ; | |
231 | i++; | |
232 | } | |
233 | priv->used_meram_cache[i] = 0; | |
234 | priv->used_meram_cache_regions--; | |
235 | break; | |
236 | } | |
237 | } | |
238 | } | |
239 | ||
3fedd2ac D |
240 | /* |
241 | * is this a YCbCr(NV12, NV16 or NV24) colorspace | |
242 | */ | |
243 | static inline int is_nvcolor(int cspace) | |
244 | { | |
245 | if (cspace == SH_MOBILE_MERAM_PF_NV || | |
246 | cspace == SH_MOBILE_MERAM_PF_NV24) | |
247 | return 1; | |
248 | return 0; | |
249 | } | |
7caa4342 D |
250 | |
251 | /* | |
252 | * set the next address to fetch | |
253 | */ | |
254 | static inline void meram_set_next_addr(struct sh_mobile_meram_priv *priv, | |
255 | struct sh_mobile_meram_cfg *cfg, | |
256 | unsigned long base_addr_y, | |
257 | unsigned long base_addr_c) | |
258 | { | |
259 | unsigned long target; | |
260 | ||
261 | target = (cfg->current_reg) ? MExxSARA : MExxSARB; | |
262 | cfg->current_reg ^= 1; | |
263 | ||
264 | /* set the next address to fetch */ | |
265 | meram_write_icb(priv->base, cfg->icb[0].cache_icb, target, | |
266 | base_addr_y); | |
267 | meram_write_icb(priv->base, cfg->icb[0].marker_icb, target, | |
268 | base_addr_y + cfg->icb[0].cache_unit); | |
269 | ||
3fedd2ac | 270 | if (is_nvcolor(cfg->pixelformat)) { |
7caa4342 D |
271 | meram_write_icb(priv->base, cfg->icb[1].cache_icb, target, |
272 | base_addr_c); | |
273 | meram_write_icb(priv->base, cfg->icb[1].marker_icb, target, | |
274 | base_addr_c + cfg->icb[1].cache_unit); | |
275 | } | |
276 | } | |
277 | ||
278 | /* | |
279 | * get the next ICB address | |
280 | */ | |
281 | static inline void meram_get_next_icb_addr(struct sh_mobile_meram_info *pdata, | |
282 | struct sh_mobile_meram_cfg *cfg, | |
283 | unsigned long *icb_addr_y, | |
284 | unsigned long *icb_addr_c) | |
285 | { | |
286 | unsigned long icb_offset; | |
287 | ||
288 | if (pdata->addr_mode == SH_MOBILE_MERAM_MODE0) | |
289 | icb_offset = 0x80000000 | (cfg->current_reg << 29); | |
290 | else | |
291 | icb_offset = 0xc0000000 | (cfg->current_reg << 23); | |
292 | ||
293 | *icb_addr_y = icb_offset | (cfg->icb[0].marker_icb << 24); | |
06c8a6a3 | 294 | if (is_nvcolor(cfg->pixelformat)) |
7caa4342 D |
295 | *icb_addr_c = icb_offset | (cfg->icb[1].marker_icb << 24); |
296 | } | |
297 | ||
298 | #define MERAM_CALC_BYTECOUNT(x, y) \ | |
299 | (((x) * (y) + (MERAM_LINE_WIDTH - 1)) & ~(MERAM_LINE_WIDTH - 1)) | |
300 | ||
301 | /* | |
302 | * initialize MERAM | |
303 | */ | |
304 | ||
305 | static int meram_init(struct sh_mobile_meram_priv *priv, | |
306 | struct sh_mobile_meram_icb *icb, | |
307 | int xres, int yres, int *out_pitch) | |
308 | { | |
309 | unsigned long total_byte_count = MERAM_CALC_BYTECOUNT(xres, yres); | |
310 | unsigned long bnm; | |
311 | int lcdc_pitch, xpitch, line_cnt; | |
312 | int save_lines; | |
313 | ||
314 | /* adjust pitch to 1024, 2048, 4096 or 8192 */ | |
315 | lcdc_pitch = (xres - 1) | 1023; | |
316 | lcdc_pitch = lcdc_pitch | (lcdc_pitch >> 1); | |
317 | lcdc_pitch = lcdc_pitch | (lcdc_pitch >> 2); | |
318 | lcdc_pitch += 1; | |
319 | ||
320 | /* derive settings */ | |
321 | if (lcdc_pitch == 8192 && yres >= 1024) { | |
322 | lcdc_pitch = xpitch = MERAM_LINE_WIDTH; | |
323 | line_cnt = total_byte_count >> 11; | |
324 | *out_pitch = xres; | |
325 | save_lines = (icb->meram_size / 16 / MERAM_SEC_LINE); | |
326 | save_lines *= MERAM_SEC_LINE; | |
327 | } else { | |
328 | xpitch = xres; | |
329 | line_cnt = yres; | |
330 | *out_pitch = lcdc_pitch; | |
331 | save_lines = icb->meram_size / (lcdc_pitch >> 10) / 2; | |
332 | save_lines &= 0xff; | |
333 | } | |
334 | bnm = (save_lines - 1) << 16; | |
335 | ||
336 | /* TODO: we better to check if we have enough MERAM buffer size */ | |
337 | ||
338 | /* set up ICB */ | |
339 | meram_write_icb(priv->base, icb->cache_icb, MExxBSIZE, | |
340 | MERAM_MExxBSIZE_VAL(0x0, line_cnt - 1, xpitch - 1)); | |
341 | meram_write_icb(priv->base, icb->marker_icb, MExxBSIZE, | |
342 | MERAM_MExxBSIZE_VAL(0xf, line_cnt - 1, xpitch - 1)); | |
343 | ||
344 | meram_write_icb(priv->base, icb->cache_icb, MExxMNCF, bnm); | |
345 | meram_write_icb(priv->base, icb->marker_icb, MExxMNCF, bnm); | |
346 | ||
347 | meram_write_icb(priv->base, icb->cache_icb, MExxSBSIZE, xpitch); | |
348 | meram_write_icb(priv->base, icb->marker_icb, MExxSBSIZE, xpitch); | |
349 | ||
350 | /* save a cache unit size */ | |
351 | icb->cache_unit = xres * save_lines; | |
352 | ||
353 | /* | |
354 | * Set MERAM for framebuffer | |
355 | * | |
7caa4342 D |
356 | * we also chain the cache_icb and the marker_icb. |
357 | * we also split the allocated MERAM buffer between two ICBs. | |
358 | */ | |
359 | meram_write_icb(priv->base, icb->cache_icb, MExxCTL, | |
f0a260fe LP |
360 | MERAM_MExxCTL_VAL(icb->marker_icb, icb->meram_offset) | |
361 | MExxCTL_WD1 | MExxCTL_WD0 | MExxCTL_WS | MExxCTL_CM | | |
362 | MExxCTL_MD_FB); | |
7caa4342 | 363 | meram_write_icb(priv->base, icb->marker_icb, MExxCTL, |
f0a260fe LP |
364 | MERAM_MExxCTL_VAL(icb->cache_icb, icb->meram_offset + |
365 | icb->meram_size / 2) | | |
366 | MExxCTL_WD1 | MExxCTL_WD0 | MExxCTL_WS | MExxCTL_CM | | |
367 | MExxCTL_MD_FB); | |
7caa4342 D |
368 | |
369 | return 0; | |
370 | } | |
371 | ||
372 | static void meram_deinit(struct sh_mobile_meram_priv *priv, | |
373 | struct sh_mobile_meram_icb *icb) | |
374 | { | |
375 | /* disable ICB */ | |
da6cf512 LP |
376 | meram_write_icb(priv->base, icb->cache_icb, MExxCTL, |
377 | MExxCTL_WBF | MExxCTL_WF | MExxCTL_RF); | |
378 | meram_write_icb(priv->base, icb->marker_icb, MExxCTL, | |
379 | MExxCTL_WBF | MExxCTL_WF | MExxCTL_RF); | |
7caa4342 D |
380 | icb->cache_unit = 0; |
381 | } | |
382 | ||
383 | /* | |
384 | * register the ICB | |
385 | */ | |
386 | ||
387 | static int sh_mobile_meram_register(struct sh_mobile_meram_info *pdata, | |
388 | struct sh_mobile_meram_cfg *cfg, | |
389 | int xres, int yres, int pixelformat, | |
390 | unsigned long base_addr_y, | |
391 | unsigned long base_addr_c, | |
392 | unsigned long *icb_addr_y, | |
393 | unsigned long *icb_addr_c, | |
394 | int *pitch) | |
395 | { | |
396 | struct platform_device *pdev; | |
397 | struct sh_mobile_meram_priv *priv; | |
398 | int n, out_pitch; | |
399 | int error = 0; | |
400 | ||
401 | if (!pdata || !pdata->priv || !pdata->pdev || !cfg) | |
402 | return -EINVAL; | |
403 | ||
404 | if (pixelformat != SH_MOBILE_MERAM_PF_NV && | |
3fedd2ac | 405 | pixelformat != SH_MOBILE_MERAM_PF_NV24 && |
7caa4342 D |
406 | pixelformat != SH_MOBILE_MERAM_PF_RGB) |
407 | return -EINVAL; | |
408 | ||
409 | priv = pdata->priv; | |
410 | pdev = pdata->pdev; | |
411 | ||
412 | dev_dbg(&pdev->dev, "registering %dx%d (%s) (y=%08lx, c=%08lx)", | |
413 | xres, yres, (!pixelformat) ? "yuv" : "rgb", | |
414 | base_addr_y, base_addr_c); | |
415 | ||
7caa4342 D |
416 | /* we can't handle wider than 8192px */ |
417 | if (xres > 8192) { | |
418 | dev_err(&pdev->dev, "width exceeding the limit (> 8192)."); | |
7963e21e | 419 | return -EINVAL; |
7caa4342 D |
420 | } |
421 | ||
422 | /* do we have at least one ICB config? */ | |
423 | if (cfg->icb[0].marker_icb < 0 || cfg->icb[0].cache_icb < 0) { | |
424 | dev_err(&pdev->dev, "at least one ICB is required."); | |
7963e21e LP |
425 | return -EINVAL; |
426 | } | |
427 | ||
428 | mutex_lock(&priv->lock); | |
429 | ||
430 | if (priv->used_meram_cache_regions + 2 > SH_MOBILE_MERAM_ICB_NUM) { | |
431 | dev_err(&pdev->dev, "no more ICB available."); | |
7caa4342 D |
432 | error = -EINVAL; |
433 | goto err; | |
434 | } | |
435 | ||
436 | /* make sure that there's no overlaps */ | |
437 | if (meram_check_overlap(priv, &cfg->icb[0])) { | |
438 | dev_err(&pdev->dev, "conflicting config detected."); | |
439 | error = -EINVAL; | |
440 | goto err; | |
441 | } | |
442 | n = 1; | |
443 | ||
444 | /* do the same if we have the second ICB set */ | |
445 | if (cfg->icb[1].marker_icb >= 0 && cfg->icb[1].cache_icb >= 0) { | |
446 | if (meram_check_overlap(priv, &cfg->icb[1])) { | |
447 | dev_err(&pdev->dev, "conflicting config detected."); | |
448 | error = -EINVAL; | |
449 | goto err; | |
450 | } | |
451 | n = 2; | |
452 | } | |
453 | ||
3fedd2ac | 454 | if (is_nvcolor(pixelformat) && n != 2) { |
7caa4342 D |
455 | dev_err(&pdev->dev, "requires two ICB sets for planar Y/C."); |
456 | error = -EINVAL; | |
457 | goto err; | |
458 | } | |
459 | ||
460 | /* we now register the ICB */ | |
461 | cfg->pixelformat = pixelformat; | |
462 | meram_mark(priv, &cfg->icb[0]); | |
3fedd2ac | 463 | if (is_nvcolor(pixelformat)) |
7caa4342 D |
464 | meram_mark(priv, &cfg->icb[1]); |
465 | ||
466 | /* initialize MERAM */ | |
467 | meram_init(priv, &cfg->icb[0], xres, yres, &out_pitch); | |
468 | *pitch = out_pitch; | |
469 | if (pixelformat == SH_MOBILE_MERAM_PF_NV) | |
470 | meram_init(priv, &cfg->icb[1], xres, (yres + 1) / 2, | |
471 | &out_pitch); | |
3fedd2ac D |
472 | else if (pixelformat == SH_MOBILE_MERAM_PF_NV24) |
473 | meram_init(priv, &cfg->icb[1], 2 * xres, (yres + 1) / 2, | |
474 | &out_pitch); | |
7caa4342 D |
475 | |
476 | cfg->current_reg = 1; | |
477 | meram_set_next_addr(priv, cfg, base_addr_y, base_addr_c); | |
478 | meram_get_next_icb_addr(pdata, cfg, icb_addr_y, icb_addr_c); | |
479 | ||
480 | dev_dbg(&pdev->dev, "registered - can access via y=%08lx, c=%08lx", | |
481 | *icb_addr_y, *icb_addr_c); | |
482 | ||
483 | err: | |
484 | mutex_unlock(&priv->lock); | |
485 | return error; | |
486 | } | |
487 | ||
488 | static int sh_mobile_meram_unregister(struct sh_mobile_meram_info *pdata, | |
489 | struct sh_mobile_meram_cfg *cfg) | |
490 | { | |
491 | struct sh_mobile_meram_priv *priv; | |
492 | ||
493 | if (!pdata || !pdata->priv || !cfg) | |
494 | return -EINVAL; | |
495 | ||
496 | priv = pdata->priv; | |
497 | ||
498 | mutex_lock(&priv->lock); | |
499 | ||
500 | /* deinit & unmark */ | |
3fedd2ac | 501 | if (is_nvcolor(cfg->pixelformat)) { |
7caa4342 D |
502 | meram_deinit(priv, &cfg->icb[1]); |
503 | meram_unmark(priv, &cfg->icb[1]); | |
504 | } | |
505 | meram_deinit(priv, &cfg->icb[0]); | |
506 | meram_unmark(priv, &cfg->icb[0]); | |
507 | ||
508 | mutex_unlock(&priv->lock); | |
509 | ||
510 | return 0; | |
511 | } | |
512 | ||
513 | static int sh_mobile_meram_update(struct sh_mobile_meram_info *pdata, | |
514 | struct sh_mobile_meram_cfg *cfg, | |
515 | unsigned long base_addr_y, | |
516 | unsigned long base_addr_c, | |
517 | unsigned long *icb_addr_y, | |
518 | unsigned long *icb_addr_c) | |
519 | { | |
520 | struct sh_mobile_meram_priv *priv; | |
521 | ||
522 | if (!pdata || !pdata->priv || !cfg) | |
523 | return -EINVAL; | |
524 | ||
525 | priv = pdata->priv; | |
526 | ||
527 | mutex_lock(&priv->lock); | |
528 | ||
529 | meram_set_next_addr(priv, cfg, base_addr_y, base_addr_c); | |
530 | meram_get_next_icb_addr(pdata, cfg, icb_addr_y, icb_addr_c); | |
531 | ||
532 | mutex_unlock(&priv->lock); | |
533 | ||
534 | return 0; | |
535 | } | |
536 | ||
0b3bb77c DHG |
537 | static int sh_mobile_meram_runtime_suspend(struct device *dev) |
538 | { | |
539 | struct platform_device *pdev = to_platform_device(dev); | |
540 | struct sh_mobile_meram_priv *priv = platform_get_drvdata(pdev); | |
541 | int k, j; | |
542 | ||
543 | for (k = 0; k < CMN_REGS_SIZE; k++) | |
544 | priv->cmn_saved_regs[k] = meram_read_reg(priv->base, | |
545 | common_regs[k]); | |
546 | ||
547 | for (j = 0; j < 32; j++) { | |
548 | if (!test_bit(j, &priv->used_icb)) | |
549 | continue; | |
550 | for (k = 0; k < ICB_REGS_SIZE; k++) { | |
551 | priv->icb_saved_regs[j * ICB_REGS_SIZE + k] = | |
552 | meram_read_icb(priv->base, j, icb_regs[k]); | |
553 | /* Reset ICB on resume */ | |
554 | if (icb_regs[k] == MExxCTL) | |
d86d29df | 555 | priv->icb_saved_regs[j * ICB_REGS_SIZE + k] |= |
f0a260fe | 556 | MExxCTL_WBF | MExxCTL_WF | MExxCTL_RF; |
0b3bb77c DHG |
557 | } |
558 | } | |
559 | return 0; | |
560 | } | |
561 | ||
562 | static int sh_mobile_meram_runtime_resume(struct device *dev) | |
563 | { | |
564 | struct platform_device *pdev = to_platform_device(dev); | |
565 | struct sh_mobile_meram_priv *priv = platform_get_drvdata(pdev); | |
566 | int k, j; | |
567 | ||
568 | for (j = 0; j < 32; j++) { | |
569 | if (!test_bit(j, &priv->used_icb)) | |
570 | continue; | |
571 | for (k = 0; k < ICB_REGS_SIZE; k++) { | |
572 | meram_write_icb(priv->base, j, icb_regs[k], | |
573 | priv->icb_saved_regs[j * ICB_REGS_SIZE + k]); | |
574 | } | |
575 | } | |
576 | ||
577 | for (k = 0; k < CMN_REGS_SIZE; k++) | |
578 | meram_write_reg(priv->base, common_regs[k], | |
579 | priv->cmn_saved_regs[k]); | |
580 | return 0; | |
581 | } | |
582 | ||
583 | static const struct dev_pm_ops sh_mobile_meram_dev_pm_ops = { | |
584 | .runtime_suspend = sh_mobile_meram_runtime_suspend, | |
585 | .runtime_resume = sh_mobile_meram_runtime_resume, | |
586 | }; | |
587 | ||
7caa4342 D |
588 | static struct sh_mobile_meram_ops sh_mobile_meram_ops = { |
589 | .module = THIS_MODULE, | |
590 | .meram_register = sh_mobile_meram_register, | |
591 | .meram_unregister = sh_mobile_meram_unregister, | |
592 | .meram_update = sh_mobile_meram_update, | |
593 | }; | |
594 | ||
595 | /* | |
596 | * initialize MERAM | |
597 | */ | |
598 | ||
599 | static int sh_mobile_meram_remove(struct platform_device *pdev); | |
600 | ||
601 | static int __devinit sh_mobile_meram_probe(struct platform_device *pdev) | |
602 | { | |
603 | struct sh_mobile_meram_priv *priv; | |
604 | struct sh_mobile_meram_info *pdata = pdev->dev.platform_data; | |
605 | struct resource *res; | |
606 | int error; | |
607 | ||
608 | if (!pdata) { | |
609 | dev_err(&pdev->dev, "no platform data defined\n"); | |
610 | return -EINVAL; | |
611 | } | |
612 | ||
613 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
614 | if (!res) { | |
615 | dev_err(&pdev->dev, "cannot get platform resources\n"); | |
616 | return -ENOENT; | |
617 | } | |
618 | ||
619 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
620 | if (!priv) { | |
621 | dev_err(&pdev->dev, "cannot allocate device data\n"); | |
622 | return -ENOMEM; | |
623 | } | |
624 | ||
625 | platform_set_drvdata(pdev, priv); | |
626 | ||
627 | /* initialize private data */ | |
628 | mutex_init(&priv->lock); | |
629 | priv->base = ioremap_nocache(res->start, resource_size(res)); | |
630 | if (!priv->base) { | |
631 | dev_err(&pdev->dev, "ioremap failed\n"); | |
632 | error = -EFAULT; | |
633 | goto err; | |
634 | } | |
635 | pdata->ops = &sh_mobile_meram_ops; | |
636 | pdata->priv = priv; | |
637 | pdata->pdev = pdev; | |
638 | ||
639 | /* initialize ICB addressing mode */ | |
640 | if (pdata->addr_mode == SH_MOBILE_MERAM_MODE1) | |
f0a260fe | 641 | meram_write_reg(priv->base, MEVCR1, MEVCR1_AMD1); |
7caa4342 | 642 | |
17673778 DHG |
643 | pm_runtime_enable(&pdev->dev); |
644 | ||
7caa4342 D |
645 | dev_info(&pdev->dev, "sh_mobile_meram initialized."); |
646 | ||
647 | return 0; | |
648 | ||
649 | err: | |
650 | sh_mobile_meram_remove(pdev); | |
651 | ||
652 | return error; | |
653 | } | |
654 | ||
655 | ||
656 | static int sh_mobile_meram_remove(struct platform_device *pdev) | |
657 | { | |
658 | struct sh_mobile_meram_priv *priv = platform_get_drvdata(pdev); | |
659 | ||
17673778 DHG |
660 | pm_runtime_disable(&pdev->dev); |
661 | ||
7caa4342 D |
662 | if (priv->base) |
663 | iounmap(priv->base); | |
664 | ||
665 | mutex_destroy(&priv->lock); | |
666 | ||
667 | kfree(priv); | |
668 | ||
669 | return 0; | |
670 | } | |
671 | ||
672 | static struct platform_driver sh_mobile_meram_driver = { | |
673 | .driver = { | |
674 | .name = "sh_mobile_meram", | |
675 | .owner = THIS_MODULE, | |
0b3bb77c | 676 | .pm = &sh_mobile_meram_dev_pm_ops, |
7caa4342 D |
677 | }, |
678 | .probe = sh_mobile_meram_probe, | |
679 | .remove = sh_mobile_meram_remove, | |
680 | }; | |
681 | ||
682 | static int __init sh_mobile_meram_init(void) | |
683 | { | |
684 | return platform_driver_register(&sh_mobile_meram_driver); | |
685 | } | |
686 | ||
687 | static void __exit sh_mobile_meram_exit(void) | |
688 | { | |
689 | platform_driver_unregister(&sh_mobile_meram_driver); | |
690 | } | |
691 | ||
692 | module_init(sh_mobile_meram_init); | |
693 | module_exit(sh_mobile_meram_exit); | |
694 | ||
695 | MODULE_DESCRIPTION("SuperH Mobile MERAM driver"); | |
696 | MODULE_AUTHOR("Damian Hobson-Garcia / Takanari Hayama"); | |
697 | MODULE_LICENSE("GPL v2"); |