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Commit | Line | Data |
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a49e490c VZ |
1 | /* |
2 | * Cryptographic API. | |
3 | * | |
4 | * Support for Samsung S5PV210 HW acceleration. | |
5 | * | |
6 | * Copyright (C) 2011 NetUP Inc. All rights reserved. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as published | |
10 | * by the Free Software Foundation. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include <linux/delay.h> | |
15 | #include <linux/err.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/errno.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/clk.h> | |
21 | #include <linux/platform_device.h> | |
22 | #include <linux/scatterlist.h> | |
23 | #include <linux/dma-mapping.h> | |
24 | #include <linux/io.h> | |
25 | #include <linux/crypto.h> | |
26 | #include <linux/interrupt.h> | |
27 | ||
28 | #include <crypto/algapi.h> | |
29 | #include <crypto/aes.h> | |
30 | #include <crypto/ctr.h> | |
31 | ||
32 | #include <plat/cpu.h> | |
33 | #include <plat/dma.h> | |
34 | ||
35 | #define _SBF(s, v) ((v) << (s)) | |
36 | #define _BIT(b) _SBF(b, 1) | |
37 | ||
38 | /* Feed control registers */ | |
39 | #define SSS_REG_FCINTSTAT 0x0000 | |
40 | #define SSS_FCINTSTAT_BRDMAINT _BIT(3) | |
41 | #define SSS_FCINTSTAT_BTDMAINT _BIT(2) | |
42 | #define SSS_FCINTSTAT_HRDMAINT _BIT(1) | |
43 | #define SSS_FCINTSTAT_PKDMAINT _BIT(0) | |
44 | ||
45 | #define SSS_REG_FCINTENSET 0x0004 | |
46 | #define SSS_FCINTENSET_BRDMAINTENSET _BIT(3) | |
47 | #define SSS_FCINTENSET_BTDMAINTENSET _BIT(2) | |
48 | #define SSS_FCINTENSET_HRDMAINTENSET _BIT(1) | |
49 | #define SSS_FCINTENSET_PKDMAINTENSET _BIT(0) | |
50 | ||
51 | #define SSS_REG_FCINTENCLR 0x0008 | |
52 | #define SSS_FCINTENCLR_BRDMAINTENCLR _BIT(3) | |
53 | #define SSS_FCINTENCLR_BTDMAINTENCLR _BIT(2) | |
54 | #define SSS_FCINTENCLR_HRDMAINTENCLR _BIT(1) | |
55 | #define SSS_FCINTENCLR_PKDMAINTENCLR _BIT(0) | |
56 | ||
57 | #define SSS_REG_FCINTPEND 0x000C | |
58 | #define SSS_FCINTPEND_BRDMAINTP _BIT(3) | |
59 | #define SSS_FCINTPEND_BTDMAINTP _BIT(2) | |
60 | #define SSS_FCINTPEND_HRDMAINTP _BIT(1) | |
61 | #define SSS_FCINTPEND_PKDMAINTP _BIT(0) | |
62 | ||
63 | #define SSS_REG_FCFIFOSTAT 0x0010 | |
64 | #define SSS_FCFIFOSTAT_BRFIFOFUL _BIT(7) | |
65 | #define SSS_FCFIFOSTAT_BRFIFOEMP _BIT(6) | |
66 | #define SSS_FCFIFOSTAT_BTFIFOFUL _BIT(5) | |
67 | #define SSS_FCFIFOSTAT_BTFIFOEMP _BIT(4) | |
68 | #define SSS_FCFIFOSTAT_HRFIFOFUL _BIT(3) | |
69 | #define SSS_FCFIFOSTAT_HRFIFOEMP _BIT(2) | |
70 | #define SSS_FCFIFOSTAT_PKFIFOFUL _BIT(1) | |
71 | #define SSS_FCFIFOSTAT_PKFIFOEMP _BIT(0) | |
72 | ||
73 | #define SSS_REG_FCFIFOCTRL 0x0014 | |
74 | #define SSS_FCFIFOCTRL_DESSEL _BIT(2) | |
75 | #define SSS_HASHIN_INDEPENDENT _SBF(0, 0x00) | |
76 | #define SSS_HASHIN_CIPHER_INPUT _SBF(0, 0x01) | |
77 | #define SSS_HASHIN_CIPHER_OUTPUT _SBF(0, 0x02) | |
78 | ||
79 | #define SSS_REG_FCBRDMAS 0x0020 | |
80 | #define SSS_REG_FCBRDMAL 0x0024 | |
81 | #define SSS_REG_FCBRDMAC 0x0028 | |
82 | #define SSS_FCBRDMAC_BYTESWAP _BIT(1) | |
83 | #define SSS_FCBRDMAC_FLUSH _BIT(0) | |
84 | ||
85 | #define SSS_REG_FCBTDMAS 0x0030 | |
86 | #define SSS_REG_FCBTDMAL 0x0034 | |
87 | #define SSS_REG_FCBTDMAC 0x0038 | |
88 | #define SSS_FCBTDMAC_BYTESWAP _BIT(1) | |
89 | #define SSS_FCBTDMAC_FLUSH _BIT(0) | |
90 | ||
91 | #define SSS_REG_FCHRDMAS 0x0040 | |
92 | #define SSS_REG_FCHRDMAL 0x0044 | |
93 | #define SSS_REG_FCHRDMAC 0x0048 | |
94 | #define SSS_FCHRDMAC_BYTESWAP _BIT(1) | |
95 | #define SSS_FCHRDMAC_FLUSH _BIT(0) | |
96 | ||
97 | #define SSS_REG_FCPKDMAS 0x0050 | |
98 | #define SSS_REG_FCPKDMAL 0x0054 | |
99 | #define SSS_REG_FCPKDMAC 0x0058 | |
100 | #define SSS_FCPKDMAC_BYTESWAP _BIT(3) | |
101 | #define SSS_FCPKDMAC_DESCEND _BIT(2) | |
102 | #define SSS_FCPKDMAC_TRANSMIT _BIT(1) | |
103 | #define SSS_FCPKDMAC_FLUSH _BIT(0) | |
104 | ||
105 | #define SSS_REG_FCPKDMAO 0x005C | |
106 | ||
107 | /* AES registers */ | |
108 | #define SSS_REG_AES_CONTROL 0x4000 | |
109 | #define SSS_AES_BYTESWAP_DI _BIT(11) | |
110 | #define SSS_AES_BYTESWAP_DO _BIT(10) | |
111 | #define SSS_AES_BYTESWAP_IV _BIT(9) | |
112 | #define SSS_AES_BYTESWAP_CNT _BIT(8) | |
113 | #define SSS_AES_BYTESWAP_KEY _BIT(7) | |
114 | #define SSS_AES_KEY_CHANGE_MODE _BIT(6) | |
115 | #define SSS_AES_KEY_SIZE_128 _SBF(4, 0x00) | |
116 | #define SSS_AES_KEY_SIZE_192 _SBF(4, 0x01) | |
117 | #define SSS_AES_KEY_SIZE_256 _SBF(4, 0x02) | |
118 | #define SSS_AES_FIFO_MODE _BIT(3) | |
119 | #define SSS_AES_CHAIN_MODE_ECB _SBF(1, 0x00) | |
120 | #define SSS_AES_CHAIN_MODE_CBC _SBF(1, 0x01) | |
121 | #define SSS_AES_CHAIN_MODE_CTR _SBF(1, 0x02) | |
122 | #define SSS_AES_MODE_DECRYPT _BIT(0) | |
123 | ||
124 | #define SSS_REG_AES_STATUS 0x4004 | |
125 | #define SSS_AES_BUSY _BIT(2) | |
126 | #define SSS_AES_INPUT_READY _BIT(1) | |
127 | #define SSS_AES_OUTPUT_READY _BIT(0) | |
128 | ||
129 | #define SSS_REG_AES_IN_DATA(s) (0x4010 + (s << 2)) | |
130 | #define SSS_REG_AES_OUT_DATA(s) (0x4020 + (s << 2)) | |
131 | #define SSS_REG_AES_IV_DATA(s) (0x4030 + (s << 2)) | |
132 | #define SSS_REG_AES_CNT_DATA(s) (0x4040 + (s << 2)) | |
133 | #define SSS_REG_AES_KEY_DATA(s) (0x4080 + (s << 2)) | |
134 | ||
135 | #define SSS_REG(dev, reg) ((dev)->ioaddr + (SSS_REG_##reg)) | |
136 | #define SSS_READ(dev, reg) __raw_readl(SSS_REG(dev, reg)) | |
137 | #define SSS_WRITE(dev, reg, val) __raw_writel((val), SSS_REG(dev, reg)) | |
138 | ||
139 | /* HW engine modes */ | |
140 | #define FLAGS_AES_DECRYPT _BIT(0) | |
141 | #define FLAGS_AES_MODE_MASK _SBF(1, 0x03) | |
142 | #define FLAGS_AES_CBC _SBF(1, 0x01) | |
143 | #define FLAGS_AES_CTR _SBF(1, 0x02) | |
144 | ||
145 | #define AES_KEY_LEN 16 | |
146 | #define CRYPTO_QUEUE_LEN 1 | |
147 | ||
148 | struct s5p_aes_reqctx { | |
149 | unsigned long mode; | |
150 | }; | |
151 | ||
152 | struct s5p_aes_ctx { | |
153 | struct s5p_aes_dev *dev; | |
154 | ||
155 | uint8_t aes_key[AES_MAX_KEY_SIZE]; | |
156 | uint8_t nonce[CTR_RFC3686_NONCE_SIZE]; | |
157 | int keylen; | |
158 | }; | |
159 | ||
160 | struct s5p_aes_dev { | |
161 | struct device *dev; | |
162 | struct clk *clk; | |
163 | void __iomem *ioaddr; | |
164 | int irq_hash; | |
165 | int irq_fc; | |
166 | ||
167 | struct ablkcipher_request *req; | |
168 | struct s5p_aes_ctx *ctx; | |
169 | struct scatterlist *sg_src; | |
170 | struct scatterlist *sg_dst; | |
171 | ||
172 | struct tasklet_struct tasklet; | |
173 | struct crypto_queue queue; | |
174 | bool busy; | |
175 | spinlock_t lock; | |
176 | }; | |
177 | ||
178 | static struct s5p_aes_dev *s5p_dev; | |
179 | ||
180 | static void s5p_set_dma_indata(struct s5p_aes_dev *dev, struct scatterlist *sg) | |
181 | { | |
182 | SSS_WRITE(dev, FCBRDMAS, sg_dma_address(sg)); | |
183 | SSS_WRITE(dev, FCBRDMAL, sg_dma_len(sg)); | |
184 | } | |
185 | ||
186 | static void s5p_set_dma_outdata(struct s5p_aes_dev *dev, struct scatterlist *sg) | |
187 | { | |
188 | SSS_WRITE(dev, FCBTDMAS, sg_dma_address(sg)); | |
189 | SSS_WRITE(dev, FCBTDMAL, sg_dma_len(sg)); | |
190 | } | |
191 | ||
192 | static void s5p_aes_complete(struct s5p_aes_dev *dev, int err) | |
193 | { | |
194 | /* holding a lock outside */ | |
195 | dev->req->base.complete(&dev->req->base, err); | |
196 | dev->busy = false; | |
197 | } | |
198 | ||
199 | static void s5p_unset_outdata(struct s5p_aes_dev *dev) | |
200 | { | |
201 | dma_unmap_sg(dev->dev, dev->sg_dst, 1, DMA_FROM_DEVICE); | |
202 | } | |
203 | ||
204 | static void s5p_unset_indata(struct s5p_aes_dev *dev) | |
205 | { | |
206 | dma_unmap_sg(dev->dev, dev->sg_src, 1, DMA_TO_DEVICE); | |
207 | } | |
208 | ||
209 | static int s5p_set_outdata(struct s5p_aes_dev *dev, struct scatterlist *sg) | |
210 | { | |
211 | int err; | |
212 | ||
213 | if (!IS_ALIGNED(sg_dma_len(sg), AES_BLOCK_SIZE)) { | |
214 | err = -EINVAL; | |
215 | goto exit; | |
216 | } | |
217 | if (!sg_dma_len(sg)) { | |
218 | err = -EINVAL; | |
219 | goto exit; | |
220 | } | |
221 | ||
222 | err = dma_map_sg(dev->dev, sg, 1, DMA_FROM_DEVICE); | |
223 | if (!err) { | |
224 | err = -ENOMEM; | |
225 | goto exit; | |
226 | } | |
227 | ||
228 | dev->sg_dst = sg; | |
229 | err = 0; | |
230 | ||
231 | exit: | |
232 | return err; | |
233 | } | |
234 | ||
235 | static int s5p_set_indata(struct s5p_aes_dev *dev, struct scatterlist *sg) | |
236 | { | |
237 | int err; | |
238 | ||
239 | if (!IS_ALIGNED(sg_dma_len(sg), AES_BLOCK_SIZE)) { | |
240 | err = -EINVAL; | |
241 | goto exit; | |
242 | } | |
243 | if (!sg_dma_len(sg)) { | |
244 | err = -EINVAL; | |
245 | goto exit; | |
246 | } | |
247 | ||
248 | err = dma_map_sg(dev->dev, sg, 1, DMA_TO_DEVICE); | |
249 | if (!err) { | |
250 | err = -ENOMEM; | |
251 | goto exit; | |
252 | } | |
253 | ||
254 | dev->sg_src = sg; | |
255 | err = 0; | |
256 | ||
257 | exit: | |
258 | return err; | |
259 | } | |
260 | ||
261 | static void s5p_aes_tx(struct s5p_aes_dev *dev) | |
262 | { | |
263 | int err = 0; | |
264 | ||
265 | s5p_unset_outdata(dev); | |
266 | ||
267 | if (!sg_is_last(dev->sg_dst)) { | |
268 | err = s5p_set_outdata(dev, sg_next(dev->sg_dst)); | |
269 | if (err) { | |
270 | s5p_aes_complete(dev, err); | |
271 | return; | |
272 | } | |
273 | ||
274 | s5p_set_dma_outdata(dev, dev->sg_dst); | |
275 | } else | |
276 | s5p_aes_complete(dev, err); | |
277 | } | |
278 | ||
279 | static void s5p_aes_rx(struct s5p_aes_dev *dev) | |
280 | { | |
281 | int err; | |
282 | ||
283 | s5p_unset_indata(dev); | |
284 | ||
285 | if (!sg_is_last(dev->sg_src)) { | |
286 | err = s5p_set_indata(dev, sg_next(dev->sg_src)); | |
287 | if (err) { | |
288 | s5p_aes_complete(dev, err); | |
289 | return; | |
290 | } | |
291 | ||
292 | s5p_set_dma_indata(dev, dev->sg_src); | |
293 | } | |
294 | } | |
295 | ||
296 | static irqreturn_t s5p_aes_interrupt(int irq, void *dev_id) | |
297 | { | |
298 | struct platform_device *pdev = dev_id; | |
299 | struct s5p_aes_dev *dev = platform_get_drvdata(pdev); | |
300 | uint32_t status; | |
301 | unsigned long flags; | |
302 | ||
303 | spin_lock_irqsave(&dev->lock, flags); | |
304 | ||
305 | if (irq == dev->irq_fc) { | |
306 | status = SSS_READ(dev, FCINTSTAT); | |
307 | if (status & SSS_FCINTSTAT_BRDMAINT) | |
308 | s5p_aes_rx(dev); | |
309 | if (status & SSS_FCINTSTAT_BTDMAINT) | |
310 | s5p_aes_tx(dev); | |
311 | ||
312 | SSS_WRITE(dev, FCINTPEND, status); | |
313 | } | |
314 | ||
315 | spin_unlock_irqrestore(&dev->lock, flags); | |
316 | ||
317 | return IRQ_HANDLED; | |
318 | } | |
319 | ||
320 | static void s5p_set_aes(struct s5p_aes_dev *dev, | |
321 | uint8_t *key, uint8_t *iv, unsigned int keylen) | |
322 | { | |
323 | void __iomem *keystart; | |
324 | ||
325 | memcpy(dev->ioaddr + SSS_REG_AES_IV_DATA(0), iv, 0x10); | |
326 | ||
327 | if (keylen == AES_KEYSIZE_256) | |
328 | keystart = dev->ioaddr + SSS_REG_AES_KEY_DATA(0); | |
329 | else if (keylen == AES_KEYSIZE_192) | |
330 | keystart = dev->ioaddr + SSS_REG_AES_KEY_DATA(2); | |
331 | else | |
332 | keystart = dev->ioaddr + SSS_REG_AES_KEY_DATA(4); | |
333 | ||
334 | memcpy(keystart, key, keylen); | |
335 | } | |
336 | ||
337 | static void s5p_aes_crypt_start(struct s5p_aes_dev *dev, unsigned long mode) | |
338 | { | |
339 | struct ablkcipher_request *req = dev->req; | |
340 | ||
341 | uint32_t aes_control; | |
342 | int err; | |
343 | unsigned long flags; | |
344 | ||
345 | aes_control = SSS_AES_KEY_CHANGE_MODE; | |
346 | if (mode & FLAGS_AES_DECRYPT) | |
347 | aes_control |= SSS_AES_MODE_DECRYPT; | |
348 | ||
349 | if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CBC) | |
350 | aes_control |= SSS_AES_CHAIN_MODE_CBC; | |
351 | else if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CTR) | |
352 | aes_control |= SSS_AES_CHAIN_MODE_CTR; | |
353 | ||
354 | if (dev->ctx->keylen == AES_KEYSIZE_192) | |
355 | aes_control |= SSS_AES_KEY_SIZE_192; | |
356 | else if (dev->ctx->keylen == AES_KEYSIZE_256) | |
357 | aes_control |= SSS_AES_KEY_SIZE_256; | |
358 | ||
359 | aes_control |= SSS_AES_FIFO_MODE; | |
360 | ||
361 | /* as a variant it is possible to use byte swapping on DMA side */ | |
362 | aes_control |= SSS_AES_BYTESWAP_DI | |
363 | | SSS_AES_BYTESWAP_DO | |
364 | | SSS_AES_BYTESWAP_IV | |
365 | | SSS_AES_BYTESWAP_KEY | |
366 | | SSS_AES_BYTESWAP_CNT; | |
367 | ||
368 | spin_lock_irqsave(&dev->lock, flags); | |
369 | ||
370 | SSS_WRITE(dev, FCINTENCLR, | |
371 | SSS_FCINTENCLR_BTDMAINTENCLR | SSS_FCINTENCLR_BRDMAINTENCLR); | |
372 | SSS_WRITE(dev, FCFIFOCTRL, 0x00); | |
373 | ||
374 | err = s5p_set_indata(dev, req->src); | |
375 | if (err) | |
376 | goto indata_error; | |
377 | ||
378 | err = s5p_set_outdata(dev, req->dst); | |
379 | if (err) | |
380 | goto outdata_error; | |
381 | ||
382 | SSS_WRITE(dev, AES_CONTROL, aes_control); | |
383 | s5p_set_aes(dev, dev->ctx->aes_key, req->info, dev->ctx->keylen); | |
384 | ||
385 | s5p_set_dma_indata(dev, req->src); | |
386 | s5p_set_dma_outdata(dev, req->dst); | |
387 | ||
388 | SSS_WRITE(dev, FCINTENSET, | |
389 | SSS_FCINTENSET_BTDMAINTENSET | SSS_FCINTENSET_BRDMAINTENSET); | |
390 | ||
391 | spin_unlock_irqrestore(&dev->lock, flags); | |
392 | ||
393 | return; | |
394 | ||
395 | outdata_error: | |
396 | s5p_unset_indata(dev); | |
397 | ||
398 | indata_error: | |
399 | s5p_aes_complete(dev, err); | |
400 | spin_unlock_irqrestore(&dev->lock, flags); | |
401 | } | |
402 | ||
403 | static void s5p_tasklet_cb(unsigned long data) | |
404 | { | |
405 | struct s5p_aes_dev *dev = (struct s5p_aes_dev *)data; | |
406 | struct crypto_async_request *async_req, *backlog; | |
407 | struct s5p_aes_reqctx *reqctx; | |
408 | unsigned long flags; | |
409 | ||
410 | spin_lock_irqsave(&dev->lock, flags); | |
411 | backlog = crypto_get_backlog(&dev->queue); | |
412 | async_req = crypto_dequeue_request(&dev->queue); | |
413 | spin_unlock_irqrestore(&dev->lock, flags); | |
414 | ||
415 | if (!async_req) | |
416 | return; | |
417 | ||
418 | if (backlog) | |
419 | backlog->complete(backlog, -EINPROGRESS); | |
420 | ||
421 | dev->req = ablkcipher_request_cast(async_req); | |
422 | dev->ctx = crypto_tfm_ctx(dev->req->base.tfm); | |
423 | reqctx = ablkcipher_request_ctx(dev->req); | |
424 | ||
425 | s5p_aes_crypt_start(dev, reqctx->mode); | |
426 | } | |
427 | ||
428 | static int s5p_aes_handle_req(struct s5p_aes_dev *dev, | |
429 | struct ablkcipher_request *req) | |
430 | { | |
431 | unsigned long flags; | |
432 | int err; | |
433 | ||
434 | spin_lock_irqsave(&dev->lock, flags); | |
435 | if (dev->busy) { | |
436 | err = -EAGAIN; | |
437 | spin_unlock_irqrestore(&dev->lock, flags); | |
438 | goto exit; | |
439 | } | |
440 | dev->busy = true; | |
441 | ||
442 | err = ablkcipher_enqueue_request(&dev->queue, req); | |
443 | spin_unlock_irqrestore(&dev->lock, flags); | |
444 | ||
445 | tasklet_schedule(&dev->tasklet); | |
446 | ||
447 | exit: | |
448 | return err; | |
449 | } | |
450 | ||
451 | static int s5p_aes_crypt(struct ablkcipher_request *req, unsigned long mode) | |
452 | { | |
453 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); | |
454 | struct s5p_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm); | |
455 | struct s5p_aes_reqctx *reqctx = ablkcipher_request_ctx(req); | |
456 | struct s5p_aes_dev *dev = ctx->dev; | |
457 | ||
458 | if (!IS_ALIGNED(req->nbytes, AES_BLOCK_SIZE)) { | |
459 | pr_err("request size is not exact amount of AES blocks\n"); | |
460 | return -EINVAL; | |
461 | } | |
462 | ||
463 | reqctx->mode = mode; | |
464 | ||
465 | return s5p_aes_handle_req(dev, req); | |
466 | } | |
467 | ||
468 | static int s5p_aes_setkey(struct crypto_ablkcipher *cipher, | |
469 | const uint8_t *key, unsigned int keylen) | |
470 | { | |
471 | struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher); | |
472 | struct s5p_aes_ctx *ctx = crypto_tfm_ctx(tfm); | |
473 | ||
474 | if (keylen != AES_KEYSIZE_128 && | |
475 | keylen != AES_KEYSIZE_192 && | |
476 | keylen != AES_KEYSIZE_256) | |
477 | return -EINVAL; | |
478 | ||
479 | memcpy(ctx->aes_key, key, keylen); | |
480 | ctx->keylen = keylen; | |
481 | ||
482 | return 0; | |
483 | } | |
484 | ||
485 | static int s5p_aes_ecb_encrypt(struct ablkcipher_request *req) | |
486 | { | |
487 | return s5p_aes_crypt(req, 0); | |
488 | } | |
489 | ||
490 | static int s5p_aes_ecb_decrypt(struct ablkcipher_request *req) | |
491 | { | |
492 | return s5p_aes_crypt(req, FLAGS_AES_DECRYPT); | |
493 | } | |
494 | ||
495 | static int s5p_aes_cbc_encrypt(struct ablkcipher_request *req) | |
496 | { | |
497 | return s5p_aes_crypt(req, FLAGS_AES_CBC); | |
498 | } | |
499 | ||
500 | static int s5p_aes_cbc_decrypt(struct ablkcipher_request *req) | |
501 | { | |
502 | return s5p_aes_crypt(req, FLAGS_AES_DECRYPT | FLAGS_AES_CBC); | |
503 | } | |
504 | ||
505 | static int s5p_aes_cra_init(struct crypto_tfm *tfm) | |
506 | { | |
507 | struct s5p_aes_ctx *ctx = crypto_tfm_ctx(tfm); | |
508 | ||
509 | ctx->dev = s5p_dev; | |
510 | tfm->crt_ablkcipher.reqsize = sizeof(struct s5p_aes_reqctx); | |
511 | ||
512 | return 0; | |
513 | } | |
514 | ||
515 | static struct crypto_alg algs[] = { | |
516 | { | |
517 | .cra_name = "ecb(aes)", | |
518 | .cra_driver_name = "ecb-aes-s5p", | |
519 | .cra_priority = 100, | |
520 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | | |
d912bb76 NM |
521 | CRYPTO_ALG_ASYNC | |
522 | CRYPTO_ALG_KERN_DRIVER_ONLY, | |
a49e490c VZ |
523 | .cra_blocksize = AES_BLOCK_SIZE, |
524 | .cra_ctxsize = sizeof(struct s5p_aes_ctx), | |
525 | .cra_alignmask = 0x0f, | |
526 | .cra_type = &crypto_ablkcipher_type, | |
527 | .cra_module = THIS_MODULE, | |
528 | .cra_init = s5p_aes_cra_init, | |
529 | .cra_u.ablkcipher = { | |
530 | .min_keysize = AES_MIN_KEY_SIZE, | |
531 | .max_keysize = AES_MAX_KEY_SIZE, | |
532 | .setkey = s5p_aes_setkey, | |
533 | .encrypt = s5p_aes_ecb_encrypt, | |
534 | .decrypt = s5p_aes_ecb_decrypt, | |
535 | } | |
536 | }, | |
537 | { | |
538 | .cra_name = "cbc(aes)", | |
539 | .cra_driver_name = "cbc-aes-s5p", | |
540 | .cra_priority = 100, | |
541 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | | |
d912bb76 NM |
542 | CRYPTO_ALG_ASYNC | |
543 | CRYPTO_ALG_KERN_DRIVER_ONLY, | |
a49e490c VZ |
544 | .cra_blocksize = AES_BLOCK_SIZE, |
545 | .cra_ctxsize = sizeof(struct s5p_aes_ctx), | |
546 | .cra_alignmask = 0x0f, | |
547 | .cra_type = &crypto_ablkcipher_type, | |
548 | .cra_module = THIS_MODULE, | |
549 | .cra_init = s5p_aes_cra_init, | |
550 | .cra_u.ablkcipher = { | |
551 | .min_keysize = AES_MIN_KEY_SIZE, | |
552 | .max_keysize = AES_MAX_KEY_SIZE, | |
553 | .ivsize = AES_BLOCK_SIZE, | |
554 | .setkey = s5p_aes_setkey, | |
555 | .encrypt = s5p_aes_cbc_encrypt, | |
556 | .decrypt = s5p_aes_cbc_decrypt, | |
557 | } | |
558 | }, | |
559 | }; | |
560 | ||
561 | static int s5p_aes_probe(struct platform_device *pdev) | |
562 | { | |
563 | int i, j, err = -ENODEV; | |
564 | struct s5p_aes_dev *pdata; | |
565 | struct device *dev = &pdev->dev; | |
566 | struct resource *res; | |
567 | ||
568 | if (s5p_dev) | |
569 | return -EEXIST; | |
570 | ||
571 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
572 | if (!res) | |
573 | return -ENODEV; | |
574 | ||
575 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
576 | if (!pdata) | |
577 | return -ENOMEM; | |
578 | ||
579 | if (!devm_request_mem_region(dev, res->start, | |
580 | resource_size(res), pdev->name)) | |
581 | return -EBUSY; | |
582 | ||
583 | pdata->clk = clk_get(dev, "secss"); | |
584 | if (IS_ERR(pdata->clk)) { | |
585 | dev_err(dev, "failed to find secss clock source\n"); | |
586 | return -ENOENT; | |
587 | } | |
588 | ||
589 | clk_enable(pdata->clk); | |
590 | ||
591 | spin_lock_init(&pdata->lock); | |
592 | pdata->ioaddr = devm_ioremap(dev, res->start, | |
593 | resource_size(res)); | |
594 | ||
595 | pdata->irq_hash = platform_get_irq_byname(pdev, "hash"); | |
596 | if (pdata->irq_hash < 0) { | |
597 | err = pdata->irq_hash; | |
598 | dev_warn(dev, "hash interrupt is not available.\n"); | |
599 | goto err_irq; | |
600 | } | |
601 | err = devm_request_irq(dev, pdata->irq_hash, s5p_aes_interrupt, | |
602 | IRQF_SHARED, pdev->name, pdev); | |
603 | if (err < 0) { | |
604 | dev_warn(dev, "hash interrupt is not available.\n"); | |
605 | goto err_irq; | |
606 | } | |
607 | ||
608 | pdata->irq_fc = platform_get_irq_byname(pdev, "feed control"); | |
609 | if (pdata->irq_fc < 0) { | |
610 | err = pdata->irq_fc; | |
611 | dev_warn(dev, "feed control interrupt is not available.\n"); | |
612 | goto err_irq; | |
613 | } | |
614 | err = devm_request_irq(dev, pdata->irq_fc, s5p_aes_interrupt, | |
615 | IRQF_SHARED, pdev->name, pdev); | |
616 | if (err < 0) { | |
617 | dev_warn(dev, "feed control interrupt is not available.\n"); | |
618 | goto err_irq; | |
619 | } | |
620 | ||
621 | pdata->dev = dev; | |
622 | platform_set_drvdata(pdev, pdata); | |
623 | s5p_dev = pdata; | |
624 | ||
625 | tasklet_init(&pdata->tasklet, s5p_tasklet_cb, (unsigned long)pdata); | |
626 | crypto_init_queue(&pdata->queue, CRYPTO_QUEUE_LEN); | |
627 | ||
628 | for (i = 0; i < ARRAY_SIZE(algs); i++) { | |
629 | INIT_LIST_HEAD(&algs[i].cra_list); | |
630 | err = crypto_register_alg(&algs[i]); | |
631 | if (err) | |
632 | goto err_algs; | |
633 | } | |
634 | ||
635 | pr_info("s5p-sss driver registered\n"); | |
636 | ||
637 | return 0; | |
638 | ||
639 | err_algs: | |
640 | dev_err(dev, "can't register '%s': %d\n", algs[i].cra_name, err); | |
641 | ||
642 | for (j = 0; j < i; j++) | |
643 | crypto_unregister_alg(&algs[j]); | |
644 | ||
645 | tasklet_kill(&pdata->tasklet); | |
646 | ||
647 | err_irq: | |
648 | clk_disable(pdata->clk); | |
649 | clk_put(pdata->clk); | |
650 | ||
651 | s5p_dev = NULL; | |
652 | platform_set_drvdata(pdev, NULL); | |
653 | ||
654 | return err; | |
655 | } | |
656 | ||
657 | static int s5p_aes_remove(struct platform_device *pdev) | |
658 | { | |
659 | struct s5p_aes_dev *pdata = platform_get_drvdata(pdev); | |
660 | int i; | |
661 | ||
662 | if (!pdata) | |
663 | return -ENODEV; | |
664 | ||
665 | for (i = 0; i < ARRAY_SIZE(algs); i++) | |
666 | crypto_unregister_alg(&algs[i]); | |
667 | ||
668 | tasklet_kill(&pdata->tasklet); | |
669 | ||
670 | clk_disable(pdata->clk); | |
671 | clk_put(pdata->clk); | |
672 | ||
673 | s5p_dev = NULL; | |
674 | platform_set_drvdata(pdev, NULL); | |
675 | ||
676 | return 0; | |
677 | } | |
678 | ||
679 | static struct platform_driver s5p_aes_crypto = { | |
680 | .probe = s5p_aes_probe, | |
681 | .remove = s5p_aes_remove, | |
682 | .driver = { | |
683 | .owner = THIS_MODULE, | |
684 | .name = "s5p-secss", | |
685 | }, | |
686 | }; | |
687 | ||
741e8c2d | 688 | module_platform_driver(s5p_aes_crypto); |
a49e490c VZ |
689 | |
690 | MODULE_DESCRIPTION("S5PV210 AES hw acceleration support."); | |
691 | MODULE_LICENSE("GPL v2"); | |
692 | MODULE_AUTHOR("Vladimir Zapolskiy <vzapolskiy@gmail.com>"); |