Commit | Line | Data |
---|---|---|
d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
e91aa9d5 JF |
2 | /* |
3 | * Support for OMAP DES and Triple DES HW acceleration. | |
4 | * | |
5 | * Copyright (c) 2013 Texas Instruments Incorporated | |
6 | * Author: Joel Fernandes <joelf@ti.com> | |
e91aa9d5 JF |
7 | */ |
8 | ||
9 | #define pr_fmt(fmt) "%s: " fmt, __func__ | |
10 | ||
11 | #ifdef DEBUG | |
12 | #define prn(num) printk(#num "=%d\n", num) | |
13 | #define prx(num) printk(#num "=%x\n", num) | |
14 | #else | |
15 | #define prn(num) do { } while (0) | |
16 | #define prx(num) do { } while (0) | |
17 | #endif | |
18 | ||
19 | #include <linux/err.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/errno.h> | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/platform_device.h> | |
25 | #include <linux/scatterlist.h> | |
26 | #include <linux/dma-mapping.h> | |
27 | #include <linux/dmaengine.h> | |
e91aa9d5 JF |
28 | #include <linux/pm_runtime.h> |
29 | #include <linux/of.h> | |
30 | #include <linux/of_device.h> | |
31 | #include <linux/of_address.h> | |
32 | #include <linux/io.h> | |
33 | #include <linux/crypto.h> | |
34 | #include <linux/interrupt.h> | |
35 | #include <crypto/scatterwalk.h> | |
36 | #include <crypto/des.h> | |
f1b77aac | 37 | #include <crypto/algapi.h> |
2589ad84 | 38 | #include <crypto/engine.h> |
e91aa9d5 | 39 | |
9765e768 TK |
40 | #include "omap-crypto.h" |
41 | ||
e91aa9d5 JF |
42 | #define DST_MAXBURST 2 |
43 | ||
44 | #define DES_BLOCK_WORDS (DES_BLOCK_SIZE >> 2) | |
45 | ||
46 | #define _calc_walked(inout) (dd->inout##_walk.offset - dd->inout##_sg->offset) | |
47 | ||
48 | #define DES_REG_KEY(dd, x) ((dd)->pdata->key_ofs - \ | |
49 | ((x ^ 0x01) * 0x04)) | |
50 | ||
51 | #define DES_REG_IV(dd, x) ((dd)->pdata->iv_ofs + ((x) * 0x04)) | |
52 | ||
53 | #define DES_REG_CTRL(dd) ((dd)->pdata->ctrl_ofs) | |
54 | #define DES_REG_CTRL_CBC BIT(4) | |
55 | #define DES_REG_CTRL_TDES BIT(3) | |
56 | #define DES_REG_CTRL_DIRECTION BIT(2) | |
57 | #define DES_REG_CTRL_INPUT_READY BIT(1) | |
58 | #define DES_REG_CTRL_OUTPUT_READY BIT(0) | |
59 | ||
60 | #define DES_REG_DATA_N(dd, x) ((dd)->pdata->data_ofs + ((x) * 0x04)) | |
61 | ||
62 | #define DES_REG_REV(dd) ((dd)->pdata->rev_ofs) | |
63 | ||
64 | #define DES_REG_MASK(dd) ((dd)->pdata->mask_ofs) | |
65 | ||
66 | #define DES_REG_LENGTH_N(x) (0x24 + ((x) * 0x04)) | |
67 | ||
68 | #define DES_REG_IRQ_STATUS(dd) ((dd)->pdata->irq_status_ofs) | |
69 | #define DES_REG_IRQ_ENABLE(dd) ((dd)->pdata->irq_enable_ofs) | |
70 | #define DES_REG_IRQ_DATA_IN BIT(1) | |
71 | #define DES_REG_IRQ_DATA_OUT BIT(2) | |
72 | ||
73 | #define FLAGS_MODE_MASK 0x000f | |
74 | #define FLAGS_ENCRYPT BIT(0) | |
75 | #define FLAGS_CBC BIT(1) | |
76 | #define FLAGS_INIT BIT(4) | |
77 | #define FLAGS_BUSY BIT(6) | |
78 | ||
418f2a8c TK |
79 | #define DEFAULT_AUTOSUSPEND_DELAY 1000 |
80 | ||
9765e768 TK |
81 | #define FLAGS_IN_DATA_ST_SHIFT 8 |
82 | #define FLAGS_OUT_DATA_ST_SHIFT 10 | |
83 | ||
e91aa9d5 | 84 | struct omap_des_ctx { |
c21c8b89 | 85 | struct crypto_engine_ctx enginectx; |
e91aa9d5 JF |
86 | struct omap_des_dev *dd; |
87 | ||
88 | int keylen; | |
89 | u32 key[(3 * DES_KEY_SIZE) / sizeof(u32)]; | |
90 | unsigned long flags; | |
91 | }; | |
92 | ||
93 | struct omap_des_reqctx { | |
94 | unsigned long mode; | |
95 | }; | |
96 | ||
97 | #define OMAP_DES_QUEUE_LENGTH 1 | |
98 | #define OMAP_DES_CACHE_SIZE 0 | |
99 | ||
100 | struct omap_des_algs_info { | |
101 | struct crypto_alg *algs_list; | |
102 | unsigned int size; | |
103 | unsigned int registered; | |
104 | }; | |
105 | ||
106 | struct omap_des_pdata { | |
107 | struct omap_des_algs_info *algs_info; | |
108 | unsigned int algs_info_size; | |
109 | ||
110 | void (*trigger)(struct omap_des_dev *dd, int length); | |
111 | ||
112 | u32 key_ofs; | |
113 | u32 iv_ofs; | |
114 | u32 ctrl_ofs; | |
115 | u32 data_ofs; | |
116 | u32 rev_ofs; | |
117 | u32 mask_ofs; | |
118 | u32 irq_enable_ofs; | |
119 | u32 irq_status_ofs; | |
120 | ||
121 | u32 dma_enable_in; | |
122 | u32 dma_enable_out; | |
123 | u32 dma_start; | |
124 | ||
125 | u32 major_mask; | |
126 | u32 major_shift; | |
127 | u32 minor_mask; | |
128 | u32 minor_shift; | |
129 | }; | |
130 | ||
131 | struct omap_des_dev { | |
132 | struct list_head list; | |
133 | unsigned long phys_base; | |
134 | void __iomem *io_base; | |
135 | struct omap_des_ctx *ctx; | |
136 | struct device *dev; | |
137 | unsigned long flags; | |
138 | int err; | |
139 | ||
e91aa9d5 | 140 | struct tasklet_struct done_task; |
e91aa9d5 JF |
141 | |
142 | struct ablkcipher_request *req; | |
f1b77aac | 143 | struct crypto_engine *engine; |
e91aa9d5 JF |
144 | /* |
145 | * total is used by PIO mode for book keeping so introduce | |
146 | * variable total_save as need it to calc page_order | |
147 | */ | |
148 | size_t total; | |
149 | size_t total_save; | |
150 | ||
151 | struct scatterlist *in_sg; | |
152 | struct scatterlist *out_sg; | |
153 | ||
154 | /* Buffers for copying for unaligned cases */ | |
155 | struct scatterlist in_sgl; | |
156 | struct scatterlist out_sgl; | |
157 | struct scatterlist *orig_out; | |
e91aa9d5 JF |
158 | |
159 | struct scatter_walk in_walk; | |
160 | struct scatter_walk out_walk; | |
e91aa9d5 | 161 | struct dma_chan *dma_lch_in; |
e91aa9d5 JF |
162 | struct dma_chan *dma_lch_out; |
163 | int in_sg_len; | |
164 | int out_sg_len; | |
165 | int pio_only; | |
166 | const struct omap_des_pdata *pdata; | |
167 | }; | |
168 | ||
169 | /* keep registered devices data here */ | |
170 | static LIST_HEAD(dev_list); | |
171 | static DEFINE_SPINLOCK(list_lock); | |
172 | ||
173 | #ifdef DEBUG | |
174 | #define omap_des_read(dd, offset) \ | |
175 | ({ \ | |
176 | int _read_ret; \ | |
177 | _read_ret = __raw_readl(dd->io_base + offset); \ | |
178 | pr_err("omap_des_read(" #offset "=%#x)= %#x\n", \ | |
179 | offset, _read_ret); \ | |
180 | _read_ret; \ | |
181 | }) | |
182 | #else | |
183 | static inline u32 omap_des_read(struct omap_des_dev *dd, u32 offset) | |
184 | { | |
185 | return __raw_readl(dd->io_base + offset); | |
186 | } | |
187 | #endif | |
188 | ||
189 | #ifdef DEBUG | |
190 | #define omap_des_write(dd, offset, value) \ | |
191 | do { \ | |
192 | pr_err("omap_des_write(" #offset "=%#x) value=%#x\n", \ | |
193 | offset, value); \ | |
194 | __raw_writel(value, dd->io_base + offset); \ | |
195 | } while (0) | |
196 | #else | |
197 | static inline void omap_des_write(struct omap_des_dev *dd, u32 offset, | |
198 | u32 value) | |
199 | { | |
200 | __raw_writel(value, dd->io_base + offset); | |
201 | } | |
202 | #endif | |
203 | ||
204 | static inline void omap_des_write_mask(struct omap_des_dev *dd, u32 offset, | |
205 | u32 value, u32 mask) | |
206 | { | |
207 | u32 val; | |
208 | ||
209 | val = omap_des_read(dd, offset); | |
210 | val &= ~mask; | |
211 | val |= value; | |
212 | omap_des_write(dd, offset, val); | |
213 | } | |
214 | ||
215 | static void omap_des_write_n(struct omap_des_dev *dd, u32 offset, | |
216 | u32 *value, int count) | |
217 | { | |
218 | for (; count--; value++, offset += 4) | |
219 | omap_des_write(dd, offset, *value); | |
220 | } | |
221 | ||
222 | static int omap_des_hw_init(struct omap_des_dev *dd) | |
223 | { | |
f51f593b NM |
224 | int err; |
225 | ||
e91aa9d5 JF |
226 | /* |
227 | * clocks are enabled when request starts and disabled when finished. | |
228 | * It may be long delays between requests. | |
229 | * Device might go to off mode to save power. | |
230 | */ | |
f51f593b NM |
231 | err = pm_runtime_get_sync(dd->dev); |
232 | if (err < 0) { | |
233 | pm_runtime_put_noidle(dd->dev); | |
234 | dev_err(dd->dev, "%s: failed to get_sync(%d)\n", __func__, err); | |
235 | return err; | |
236 | } | |
e91aa9d5 JF |
237 | |
238 | if (!(dd->flags & FLAGS_INIT)) { | |
239 | dd->flags |= FLAGS_INIT; | |
240 | dd->err = 0; | |
241 | } | |
242 | ||
243 | return 0; | |
244 | } | |
245 | ||
246 | static int omap_des_write_ctrl(struct omap_des_dev *dd) | |
247 | { | |
248 | unsigned int key32; | |
249 | int i, err; | |
250 | u32 val = 0, mask = 0; | |
251 | ||
252 | err = omap_des_hw_init(dd); | |
253 | if (err) | |
254 | return err; | |
255 | ||
256 | key32 = dd->ctx->keylen / sizeof(u32); | |
257 | ||
258 | /* it seems a key should always be set even if it has not changed */ | |
259 | for (i = 0; i < key32; i++) { | |
260 | omap_des_write(dd, DES_REG_KEY(dd, i), | |
261 | __le32_to_cpu(dd->ctx->key[i])); | |
262 | } | |
263 | ||
264 | if ((dd->flags & FLAGS_CBC) && dd->req->info) | |
265 | omap_des_write_n(dd, DES_REG_IV(dd, 0), dd->req->info, 2); | |
266 | ||
267 | if (dd->flags & FLAGS_CBC) | |
268 | val |= DES_REG_CTRL_CBC; | |
269 | if (dd->flags & FLAGS_ENCRYPT) | |
270 | val |= DES_REG_CTRL_DIRECTION; | |
271 | if (key32 == 6) | |
272 | val |= DES_REG_CTRL_TDES; | |
273 | ||
274 | mask |= DES_REG_CTRL_CBC | DES_REG_CTRL_DIRECTION | DES_REG_CTRL_TDES; | |
275 | ||
276 | omap_des_write_mask(dd, DES_REG_CTRL(dd), val, mask); | |
277 | ||
278 | return 0; | |
279 | } | |
280 | ||
281 | static void omap_des_dma_trigger_omap4(struct omap_des_dev *dd, int length) | |
282 | { | |
283 | u32 mask, val; | |
284 | ||
285 | omap_des_write(dd, DES_REG_LENGTH_N(0), length); | |
286 | ||
287 | val = dd->pdata->dma_start; | |
288 | ||
289 | if (dd->dma_lch_out != NULL) | |
290 | val |= dd->pdata->dma_enable_out; | |
291 | if (dd->dma_lch_in != NULL) | |
292 | val |= dd->pdata->dma_enable_in; | |
293 | ||
294 | mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in | | |
295 | dd->pdata->dma_start; | |
296 | ||
297 | omap_des_write_mask(dd, DES_REG_MASK(dd), val, mask); | |
298 | } | |
299 | ||
300 | static void omap_des_dma_stop(struct omap_des_dev *dd) | |
301 | { | |
302 | u32 mask; | |
303 | ||
304 | mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in | | |
305 | dd->pdata->dma_start; | |
306 | ||
307 | omap_des_write_mask(dd, DES_REG_MASK(dd), 0, mask); | |
308 | } | |
309 | ||
310 | static struct omap_des_dev *omap_des_find_dev(struct omap_des_ctx *ctx) | |
311 | { | |
312 | struct omap_des_dev *dd = NULL, *tmp; | |
313 | ||
314 | spin_lock_bh(&list_lock); | |
315 | if (!ctx->dd) { | |
316 | list_for_each_entry(tmp, &dev_list, list) { | |
317 | /* FIXME: take fist available des core */ | |
318 | dd = tmp; | |
319 | break; | |
320 | } | |
321 | ctx->dd = dd; | |
322 | } else { | |
323 | /* already found before */ | |
324 | dd = ctx->dd; | |
325 | } | |
326 | spin_unlock_bh(&list_lock); | |
327 | ||
328 | return dd; | |
329 | } | |
330 | ||
331 | static void omap_des_dma_out_callback(void *data) | |
332 | { | |
333 | struct omap_des_dev *dd = data; | |
334 | ||
335 | /* dma_lch_out - completed */ | |
336 | tasklet_schedule(&dd->done_task); | |
337 | } | |
338 | ||
339 | static int omap_des_dma_init(struct omap_des_dev *dd) | |
340 | { | |
2f6f0680 | 341 | int err; |
e91aa9d5 JF |
342 | |
343 | dd->dma_lch_out = NULL; | |
344 | dd->dma_lch_in = NULL; | |
345 | ||
2f6f0680 PU |
346 | dd->dma_lch_in = dma_request_chan(dd->dev, "rx"); |
347 | if (IS_ERR(dd->dma_lch_in)) { | |
e91aa9d5 | 348 | dev_err(dd->dev, "Unable to request in DMA channel\n"); |
2f6f0680 | 349 | return PTR_ERR(dd->dma_lch_in); |
e91aa9d5 JF |
350 | } |
351 | ||
2f6f0680 PU |
352 | dd->dma_lch_out = dma_request_chan(dd->dev, "tx"); |
353 | if (IS_ERR(dd->dma_lch_out)) { | |
e91aa9d5 | 354 | dev_err(dd->dev, "Unable to request out DMA channel\n"); |
2f6f0680 | 355 | err = PTR_ERR(dd->dma_lch_out); |
e91aa9d5 JF |
356 | goto err_dma_out; |
357 | } | |
358 | ||
359 | return 0; | |
360 | ||
361 | err_dma_out: | |
362 | dma_release_channel(dd->dma_lch_in); | |
2f6f0680 | 363 | |
e91aa9d5 JF |
364 | return err; |
365 | } | |
366 | ||
367 | static void omap_des_dma_cleanup(struct omap_des_dev *dd) | |
368 | { | |
2f6f0680 PU |
369 | if (dd->pio_only) |
370 | return; | |
371 | ||
e91aa9d5 JF |
372 | dma_release_channel(dd->dma_lch_out); |
373 | dma_release_channel(dd->dma_lch_in); | |
374 | } | |
375 | ||
e91aa9d5 JF |
376 | static int omap_des_crypt_dma(struct crypto_tfm *tfm, |
377 | struct scatterlist *in_sg, struct scatterlist *out_sg, | |
378 | int in_sg_len, int out_sg_len) | |
379 | { | |
380 | struct omap_des_ctx *ctx = crypto_tfm_ctx(tfm); | |
381 | struct omap_des_dev *dd = ctx->dd; | |
382 | struct dma_async_tx_descriptor *tx_in, *tx_out; | |
383 | struct dma_slave_config cfg; | |
384 | int ret; | |
385 | ||
386 | if (dd->pio_only) { | |
387 | scatterwalk_start(&dd->in_walk, dd->in_sg); | |
388 | scatterwalk_start(&dd->out_walk, dd->out_sg); | |
389 | ||
390 | /* Enable DATAIN interrupt and let it take | |
391 | care of the rest */ | |
392 | omap_des_write(dd, DES_REG_IRQ_ENABLE(dd), 0x2); | |
393 | return 0; | |
394 | } | |
395 | ||
396 | dma_sync_sg_for_device(dd->dev, dd->in_sg, in_sg_len, DMA_TO_DEVICE); | |
397 | ||
398 | memset(&cfg, 0, sizeof(cfg)); | |
399 | ||
400 | cfg.src_addr = dd->phys_base + DES_REG_DATA_N(dd, 0); | |
401 | cfg.dst_addr = dd->phys_base + DES_REG_DATA_N(dd, 0); | |
402 | cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
403 | cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
404 | cfg.src_maxburst = DST_MAXBURST; | |
405 | cfg.dst_maxburst = DST_MAXBURST; | |
406 | ||
407 | /* IN */ | |
408 | ret = dmaengine_slave_config(dd->dma_lch_in, &cfg); | |
409 | if (ret) { | |
410 | dev_err(dd->dev, "can't configure IN dmaengine slave: %d\n", | |
411 | ret); | |
412 | return ret; | |
413 | } | |
414 | ||
415 | tx_in = dmaengine_prep_slave_sg(dd->dma_lch_in, in_sg, in_sg_len, | |
416 | DMA_MEM_TO_DEV, | |
417 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
418 | if (!tx_in) { | |
419 | dev_err(dd->dev, "IN prep_slave_sg() failed\n"); | |
420 | return -EINVAL; | |
421 | } | |
422 | ||
423 | /* No callback necessary */ | |
424 | tx_in->callback_param = dd; | |
425 | ||
426 | /* OUT */ | |
427 | ret = dmaengine_slave_config(dd->dma_lch_out, &cfg); | |
428 | if (ret) { | |
429 | dev_err(dd->dev, "can't configure OUT dmaengine slave: %d\n", | |
430 | ret); | |
431 | return ret; | |
432 | } | |
433 | ||
434 | tx_out = dmaengine_prep_slave_sg(dd->dma_lch_out, out_sg, out_sg_len, | |
435 | DMA_DEV_TO_MEM, | |
436 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
437 | if (!tx_out) { | |
438 | dev_err(dd->dev, "OUT prep_slave_sg() failed\n"); | |
439 | return -EINVAL; | |
440 | } | |
441 | ||
442 | tx_out->callback = omap_des_dma_out_callback; | |
443 | tx_out->callback_param = dd; | |
444 | ||
445 | dmaengine_submit(tx_in); | |
446 | dmaengine_submit(tx_out); | |
447 | ||
448 | dma_async_issue_pending(dd->dma_lch_in); | |
449 | dma_async_issue_pending(dd->dma_lch_out); | |
450 | ||
451 | /* start DMA */ | |
452 | dd->pdata->trigger(dd, dd->total); | |
453 | ||
454 | return 0; | |
455 | } | |
456 | ||
457 | static int omap_des_crypt_dma_start(struct omap_des_dev *dd) | |
458 | { | |
459 | struct crypto_tfm *tfm = crypto_ablkcipher_tfm( | |
460 | crypto_ablkcipher_reqtfm(dd->req)); | |
461 | int err; | |
462 | ||
463 | pr_debug("total: %d\n", dd->total); | |
464 | ||
465 | if (!dd->pio_only) { | |
466 | err = dma_map_sg(dd->dev, dd->in_sg, dd->in_sg_len, | |
467 | DMA_TO_DEVICE); | |
468 | if (!err) { | |
469 | dev_err(dd->dev, "dma_map_sg() error\n"); | |
470 | return -EINVAL; | |
471 | } | |
472 | ||
473 | err = dma_map_sg(dd->dev, dd->out_sg, dd->out_sg_len, | |
474 | DMA_FROM_DEVICE); | |
475 | if (!err) { | |
476 | dev_err(dd->dev, "dma_map_sg() error\n"); | |
477 | return -EINVAL; | |
478 | } | |
479 | } | |
480 | ||
481 | err = omap_des_crypt_dma(tfm, dd->in_sg, dd->out_sg, dd->in_sg_len, | |
482 | dd->out_sg_len); | |
483 | if (err && !dd->pio_only) { | |
484 | dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE); | |
485 | dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len, | |
486 | DMA_FROM_DEVICE); | |
487 | } | |
488 | ||
489 | return err; | |
490 | } | |
491 | ||
492 | static void omap_des_finish_req(struct omap_des_dev *dd, int err) | |
493 | { | |
494 | struct ablkcipher_request *req = dd->req; | |
495 | ||
496 | pr_debug("err: %d\n", err); | |
497 | ||
c21c8b89 | 498 | crypto_finalize_ablkcipher_request(dd->engine, req, err); |
418f2a8c TK |
499 | |
500 | pm_runtime_mark_last_busy(dd->dev); | |
501 | pm_runtime_put_autosuspend(dd->dev); | |
e91aa9d5 JF |
502 | } |
503 | ||
504 | static int omap_des_crypt_dma_stop(struct omap_des_dev *dd) | |
505 | { | |
e91aa9d5 JF |
506 | pr_debug("total: %d\n", dd->total); |
507 | ||
508 | omap_des_dma_stop(dd); | |
509 | ||
510 | dmaengine_terminate_all(dd->dma_lch_in); | |
511 | dmaengine_terminate_all(dd->dma_lch_out); | |
512 | ||
16f080aa | 513 | return 0; |
e91aa9d5 JF |
514 | } |
515 | ||
e91aa9d5 | 516 | static int omap_des_handle_queue(struct omap_des_dev *dd, |
f1b77aac | 517 | struct ablkcipher_request *req) |
e91aa9d5 | 518 | { |
e91aa9d5 | 519 | if (req) |
c21c8b89 | 520 | return crypto_transfer_ablkcipher_request_to_engine(dd->engine, req); |
e91aa9d5 | 521 | |
f1b77aac BW |
522 | return 0; |
523 | } | |
e91aa9d5 | 524 | |
f1b77aac | 525 | static int omap_des_prepare_req(struct crypto_engine *engine, |
c21c8b89 | 526 | void *areq) |
f1b77aac | 527 | { |
c21c8b89 | 528 | struct ablkcipher_request *req = container_of(areq, struct ablkcipher_request, base); |
f1b77aac BW |
529 | struct omap_des_ctx *ctx = crypto_ablkcipher_ctx( |
530 | crypto_ablkcipher_reqtfm(req)); | |
531 | struct omap_des_dev *dd = omap_des_find_dev(ctx); | |
532 | struct omap_des_reqctx *rctx; | |
9765e768 TK |
533 | int ret; |
534 | u16 flags; | |
e91aa9d5 | 535 | |
f1b77aac BW |
536 | if (!dd) |
537 | return -ENODEV; | |
e91aa9d5 JF |
538 | |
539 | /* assign new request to device */ | |
540 | dd->req = req; | |
541 | dd->total = req->nbytes; | |
542 | dd->total_save = req->nbytes; | |
543 | dd->in_sg = req->src; | |
544 | dd->out_sg = req->dst; | |
9765e768 TK |
545 | dd->orig_out = req->dst; |
546 | ||
547 | flags = OMAP_CRYPTO_COPY_DATA; | |
548 | if (req->src == req->dst) | |
549 | flags |= OMAP_CRYPTO_FORCE_COPY; | |
550 | ||
551 | ret = omap_crypto_align_sg(&dd->in_sg, dd->total, DES_BLOCK_SIZE, | |
552 | &dd->in_sgl, flags, | |
553 | FLAGS_IN_DATA_ST_SHIFT, &dd->flags); | |
554 | if (ret) | |
555 | return ret; | |
556 | ||
557 | ret = omap_crypto_align_sg(&dd->out_sg, dd->total, DES_BLOCK_SIZE, | |
558 | &dd->out_sgl, 0, | |
559 | FLAGS_OUT_DATA_ST_SHIFT, &dd->flags); | |
560 | if (ret) | |
561 | return ret; | |
e91aa9d5 | 562 | |
7c001a86 HX |
563 | dd->in_sg_len = sg_nents_for_len(dd->in_sg, dd->total); |
564 | if (dd->in_sg_len < 0) | |
565 | return dd->in_sg_len; | |
566 | ||
567 | dd->out_sg_len = sg_nents_for_len(dd->out_sg, dd->total); | |
568 | if (dd->out_sg_len < 0) | |
569 | return dd->out_sg_len; | |
570 | ||
e91aa9d5 JF |
571 | rctx = ablkcipher_request_ctx(req); |
572 | ctx = crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(req)); | |
573 | rctx->mode &= FLAGS_MODE_MASK; | |
574 | dd->flags = (dd->flags & ~FLAGS_MODE_MASK) | rctx->mode; | |
575 | ||
576 | dd->ctx = ctx; | |
577 | ctx->dd = dd; | |
578 | ||
f1b77aac BW |
579 | return omap_des_write_ctrl(dd); |
580 | } | |
e91aa9d5 | 581 | |
f1b77aac | 582 | static int omap_des_crypt_req(struct crypto_engine *engine, |
c21c8b89 | 583 | void *areq) |
f1b77aac | 584 | { |
c21c8b89 | 585 | struct ablkcipher_request *req = container_of(areq, struct ablkcipher_request, base); |
f1b77aac BW |
586 | struct omap_des_ctx *ctx = crypto_ablkcipher_ctx( |
587 | crypto_ablkcipher_reqtfm(req)); | |
588 | struct omap_des_dev *dd = omap_des_find_dev(ctx); | |
589 | ||
590 | if (!dd) | |
591 | return -ENODEV; | |
592 | ||
593 | return omap_des_crypt_dma_start(dd); | |
e91aa9d5 JF |
594 | } |
595 | ||
596 | static void omap_des_done_task(unsigned long data) | |
597 | { | |
598 | struct omap_des_dev *dd = (struct omap_des_dev *)data; | |
e91aa9d5 JF |
599 | |
600 | pr_debug("enter done_task\n"); | |
601 | ||
602 | if (!dd->pio_only) { | |
603 | dma_sync_sg_for_device(dd->dev, dd->out_sg, dd->out_sg_len, | |
604 | DMA_FROM_DEVICE); | |
605 | dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE); | |
606 | dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len, | |
607 | DMA_FROM_DEVICE); | |
608 | omap_des_crypt_dma_stop(dd); | |
609 | } | |
610 | ||
9765e768 TK |
611 | omap_crypto_cleanup(&dd->in_sgl, NULL, 0, dd->total_save, |
612 | FLAGS_IN_DATA_ST_SHIFT, dd->flags); | |
e91aa9d5 | 613 | |
9765e768 TK |
614 | omap_crypto_cleanup(&dd->out_sgl, dd->orig_out, 0, dd->total_save, |
615 | FLAGS_OUT_DATA_ST_SHIFT, dd->flags); | |
e91aa9d5 JF |
616 | |
617 | omap_des_finish_req(dd, 0); | |
e91aa9d5 JF |
618 | |
619 | pr_debug("exit\n"); | |
620 | } | |
621 | ||
e91aa9d5 JF |
622 | static int omap_des_crypt(struct ablkcipher_request *req, unsigned long mode) |
623 | { | |
624 | struct omap_des_ctx *ctx = crypto_ablkcipher_ctx( | |
625 | crypto_ablkcipher_reqtfm(req)); | |
626 | struct omap_des_reqctx *rctx = ablkcipher_request_ctx(req); | |
627 | struct omap_des_dev *dd; | |
628 | ||
629 | pr_debug("nbytes: %d, enc: %d, cbc: %d\n", req->nbytes, | |
630 | !!(mode & FLAGS_ENCRYPT), | |
631 | !!(mode & FLAGS_CBC)); | |
632 | ||
633 | if (!IS_ALIGNED(req->nbytes, DES_BLOCK_SIZE)) { | |
634 | pr_err("request size is not exact amount of DES blocks\n"); | |
635 | return -EINVAL; | |
636 | } | |
637 | ||
638 | dd = omap_des_find_dev(ctx); | |
639 | if (!dd) | |
640 | return -ENODEV; | |
641 | ||
642 | rctx->mode = mode; | |
643 | ||
644 | return omap_des_handle_queue(dd, req); | |
645 | } | |
646 | ||
647 | /* ********************** ALG API ************************************ */ | |
648 | ||
a636fdce | 649 | static int omap_des_setkey(struct crypto_ablkcipher *cipher, const u8 *key, |
e91aa9d5 JF |
650 | unsigned int keylen) |
651 | { | |
a636fdce TK |
652 | struct omap_des_ctx *ctx = crypto_ablkcipher_ctx(cipher); |
653 | struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher); | |
e91aa9d5 | 654 | |
e91aa9d5 JF |
655 | pr_debug("enter, keylen: %d\n", keylen); |
656 | ||
a636fdce | 657 | /* Do we need to test against weak key? */ |
231baecd | 658 | if (tfm->crt_flags & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS) { |
a636fdce TK |
659 | u32 tmp[DES_EXPKEY_WORDS]; |
660 | int ret = des_ekey(tmp, key); | |
661 | ||
662 | if (!ret) { | |
663 | tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY; | |
664 | return -EINVAL; | |
665 | } | |
666 | } | |
667 | ||
e91aa9d5 JF |
668 | memcpy(ctx->key, key, keylen); |
669 | ctx->keylen = keylen; | |
670 | ||
671 | return 0; | |
672 | } | |
673 | ||
7f88c4d7 HX |
674 | static int omap_des3_setkey(struct crypto_ablkcipher *cipher, const u8 *key, |
675 | unsigned int keylen) | |
676 | { | |
677 | struct omap_des_ctx *ctx = crypto_ablkcipher_ctx(cipher); | |
678 | u32 flags; | |
679 | int err; | |
680 | ||
681 | pr_debug("enter, keylen: %d\n", keylen); | |
682 | ||
683 | flags = crypto_ablkcipher_get_flags(cipher); | |
684 | err = __des3_verify_key(&flags, key); | |
685 | if (unlikely(err)) { | |
686 | crypto_ablkcipher_set_flags(cipher, flags); | |
687 | return err; | |
688 | } | |
689 | ||
690 | memcpy(ctx->key, key, keylen); | |
691 | ctx->keylen = keylen; | |
692 | ||
693 | return 0; | |
694 | } | |
695 | ||
e91aa9d5 JF |
696 | static int omap_des_ecb_encrypt(struct ablkcipher_request *req) |
697 | { | |
698 | return omap_des_crypt(req, FLAGS_ENCRYPT); | |
699 | } | |
700 | ||
701 | static int omap_des_ecb_decrypt(struct ablkcipher_request *req) | |
702 | { | |
703 | return omap_des_crypt(req, 0); | |
704 | } | |
705 | ||
706 | static int omap_des_cbc_encrypt(struct ablkcipher_request *req) | |
707 | { | |
708 | return omap_des_crypt(req, FLAGS_ENCRYPT | FLAGS_CBC); | |
709 | } | |
710 | ||
711 | static int omap_des_cbc_decrypt(struct ablkcipher_request *req) | |
712 | { | |
713 | return omap_des_crypt(req, FLAGS_CBC); | |
714 | } | |
715 | ||
c21c8b89 CL |
716 | static int omap_des_prepare_req(struct crypto_engine *engine, |
717 | void *areq); | |
718 | static int omap_des_crypt_req(struct crypto_engine *engine, | |
719 | void *areq); | |
720 | ||
e91aa9d5 JF |
721 | static int omap_des_cra_init(struct crypto_tfm *tfm) |
722 | { | |
c21c8b89 CL |
723 | struct omap_des_ctx *ctx = crypto_tfm_ctx(tfm); |
724 | ||
e91aa9d5 JF |
725 | pr_debug("enter\n"); |
726 | ||
727 | tfm->crt_ablkcipher.reqsize = sizeof(struct omap_des_reqctx); | |
728 | ||
c21c8b89 CL |
729 | ctx->enginectx.op.prepare_request = omap_des_prepare_req; |
730 | ctx->enginectx.op.unprepare_request = NULL; | |
731 | ctx->enginectx.op.do_one_request = omap_des_crypt_req; | |
732 | ||
e91aa9d5 JF |
733 | return 0; |
734 | } | |
735 | ||
736 | static void omap_des_cra_exit(struct crypto_tfm *tfm) | |
737 | { | |
738 | pr_debug("enter\n"); | |
739 | } | |
740 | ||
741 | /* ********************** ALGS ************************************ */ | |
742 | ||
743 | static struct crypto_alg algs_ecb_cbc[] = { | |
744 | { | |
745 | .cra_name = "ecb(des)", | |
746 | .cra_driver_name = "ecb-des-omap", | |
747 | .cra_priority = 100, | |
748 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | | |
749 | CRYPTO_ALG_KERN_DRIVER_ONLY | | |
750 | CRYPTO_ALG_ASYNC, | |
751 | .cra_blocksize = DES_BLOCK_SIZE, | |
752 | .cra_ctxsize = sizeof(struct omap_des_ctx), | |
753 | .cra_alignmask = 0, | |
754 | .cra_type = &crypto_ablkcipher_type, | |
755 | .cra_module = THIS_MODULE, | |
756 | .cra_init = omap_des_cra_init, | |
757 | .cra_exit = omap_des_cra_exit, | |
758 | .cra_u.ablkcipher = { | |
759 | .min_keysize = DES_KEY_SIZE, | |
760 | .max_keysize = DES_KEY_SIZE, | |
761 | .setkey = omap_des_setkey, | |
762 | .encrypt = omap_des_ecb_encrypt, | |
763 | .decrypt = omap_des_ecb_decrypt, | |
764 | } | |
765 | }, | |
766 | { | |
767 | .cra_name = "cbc(des)", | |
768 | .cra_driver_name = "cbc-des-omap", | |
769 | .cra_priority = 100, | |
770 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | | |
771 | CRYPTO_ALG_KERN_DRIVER_ONLY | | |
772 | CRYPTO_ALG_ASYNC, | |
773 | .cra_blocksize = DES_BLOCK_SIZE, | |
774 | .cra_ctxsize = sizeof(struct omap_des_ctx), | |
775 | .cra_alignmask = 0, | |
776 | .cra_type = &crypto_ablkcipher_type, | |
777 | .cra_module = THIS_MODULE, | |
778 | .cra_init = omap_des_cra_init, | |
779 | .cra_exit = omap_des_cra_exit, | |
780 | .cra_u.ablkcipher = { | |
781 | .min_keysize = DES_KEY_SIZE, | |
782 | .max_keysize = DES_KEY_SIZE, | |
783 | .ivsize = DES_BLOCK_SIZE, | |
784 | .setkey = omap_des_setkey, | |
785 | .encrypt = omap_des_cbc_encrypt, | |
786 | .decrypt = omap_des_cbc_decrypt, | |
787 | } | |
788 | }, | |
789 | { | |
790 | .cra_name = "ecb(des3_ede)", | |
791 | .cra_driver_name = "ecb-des3-omap", | |
792 | .cra_priority = 100, | |
793 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | | |
794 | CRYPTO_ALG_KERN_DRIVER_ONLY | | |
795 | CRYPTO_ALG_ASYNC, | |
796 | .cra_blocksize = DES_BLOCK_SIZE, | |
797 | .cra_ctxsize = sizeof(struct omap_des_ctx), | |
798 | .cra_alignmask = 0, | |
799 | .cra_type = &crypto_ablkcipher_type, | |
800 | .cra_module = THIS_MODULE, | |
801 | .cra_init = omap_des_cra_init, | |
802 | .cra_exit = omap_des_cra_exit, | |
803 | .cra_u.ablkcipher = { | |
804 | .min_keysize = 3*DES_KEY_SIZE, | |
805 | .max_keysize = 3*DES_KEY_SIZE, | |
7f88c4d7 | 806 | .setkey = omap_des3_setkey, |
e91aa9d5 JF |
807 | .encrypt = omap_des_ecb_encrypt, |
808 | .decrypt = omap_des_ecb_decrypt, | |
809 | } | |
810 | }, | |
811 | { | |
812 | .cra_name = "cbc(des3_ede)", | |
813 | .cra_driver_name = "cbc-des3-omap", | |
814 | .cra_priority = 100, | |
815 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | | |
816 | CRYPTO_ALG_KERN_DRIVER_ONLY | | |
817 | CRYPTO_ALG_ASYNC, | |
818 | .cra_blocksize = DES_BLOCK_SIZE, | |
819 | .cra_ctxsize = sizeof(struct omap_des_ctx), | |
820 | .cra_alignmask = 0, | |
821 | .cra_type = &crypto_ablkcipher_type, | |
822 | .cra_module = THIS_MODULE, | |
823 | .cra_init = omap_des_cra_init, | |
824 | .cra_exit = omap_des_cra_exit, | |
825 | .cra_u.ablkcipher = { | |
826 | .min_keysize = 3*DES_KEY_SIZE, | |
827 | .max_keysize = 3*DES_KEY_SIZE, | |
828 | .ivsize = DES_BLOCK_SIZE, | |
7f88c4d7 | 829 | .setkey = omap_des3_setkey, |
e91aa9d5 JF |
830 | .encrypt = omap_des_cbc_encrypt, |
831 | .decrypt = omap_des_cbc_decrypt, | |
832 | } | |
833 | } | |
834 | }; | |
835 | ||
836 | static struct omap_des_algs_info omap_des_algs_info_ecb_cbc[] = { | |
837 | { | |
838 | .algs_list = algs_ecb_cbc, | |
839 | .size = ARRAY_SIZE(algs_ecb_cbc), | |
840 | }, | |
841 | }; | |
842 | ||
843 | #ifdef CONFIG_OF | |
844 | static const struct omap_des_pdata omap_des_pdata_omap4 = { | |
845 | .algs_info = omap_des_algs_info_ecb_cbc, | |
846 | .algs_info_size = ARRAY_SIZE(omap_des_algs_info_ecb_cbc), | |
847 | .trigger = omap_des_dma_trigger_omap4, | |
848 | .key_ofs = 0x14, | |
849 | .iv_ofs = 0x18, | |
850 | .ctrl_ofs = 0x20, | |
851 | .data_ofs = 0x28, | |
852 | .rev_ofs = 0x30, | |
853 | .mask_ofs = 0x34, | |
854 | .irq_status_ofs = 0x3c, | |
855 | .irq_enable_ofs = 0x40, | |
856 | .dma_enable_in = BIT(5), | |
857 | .dma_enable_out = BIT(6), | |
858 | .major_mask = 0x0700, | |
859 | .major_shift = 8, | |
860 | .minor_mask = 0x003f, | |
861 | .minor_shift = 0, | |
862 | }; | |
863 | ||
864 | static irqreturn_t omap_des_irq(int irq, void *dev_id) | |
865 | { | |
866 | struct omap_des_dev *dd = dev_id; | |
867 | u32 status, i; | |
868 | u32 *src, *dst; | |
869 | ||
870 | status = omap_des_read(dd, DES_REG_IRQ_STATUS(dd)); | |
871 | if (status & DES_REG_IRQ_DATA_IN) { | |
872 | omap_des_write(dd, DES_REG_IRQ_ENABLE(dd), 0x0); | |
873 | ||
874 | BUG_ON(!dd->in_sg); | |
875 | ||
876 | BUG_ON(_calc_walked(in) > dd->in_sg->length); | |
877 | ||
878 | src = sg_virt(dd->in_sg) + _calc_walked(in); | |
879 | ||
880 | for (i = 0; i < DES_BLOCK_WORDS; i++) { | |
881 | omap_des_write(dd, DES_REG_DATA_N(dd, i), *src); | |
882 | ||
883 | scatterwalk_advance(&dd->in_walk, 4); | |
884 | if (dd->in_sg->length == _calc_walked(in)) { | |
5be4d4c9 | 885 | dd->in_sg = sg_next(dd->in_sg); |
e91aa9d5 JF |
886 | if (dd->in_sg) { |
887 | scatterwalk_start(&dd->in_walk, | |
888 | dd->in_sg); | |
889 | src = sg_virt(dd->in_sg) + | |
890 | _calc_walked(in); | |
891 | } | |
892 | } else { | |
893 | src++; | |
894 | } | |
895 | } | |
896 | ||
897 | /* Clear IRQ status */ | |
898 | status &= ~DES_REG_IRQ_DATA_IN; | |
899 | omap_des_write(dd, DES_REG_IRQ_STATUS(dd), status); | |
900 | ||
901 | /* Enable DATA_OUT interrupt */ | |
902 | omap_des_write(dd, DES_REG_IRQ_ENABLE(dd), 0x4); | |
903 | ||
904 | } else if (status & DES_REG_IRQ_DATA_OUT) { | |
905 | omap_des_write(dd, DES_REG_IRQ_ENABLE(dd), 0x0); | |
906 | ||
907 | BUG_ON(!dd->out_sg); | |
908 | ||
909 | BUG_ON(_calc_walked(out) > dd->out_sg->length); | |
910 | ||
911 | dst = sg_virt(dd->out_sg) + _calc_walked(out); | |
912 | ||
913 | for (i = 0; i < DES_BLOCK_WORDS; i++) { | |
914 | *dst = omap_des_read(dd, DES_REG_DATA_N(dd, i)); | |
915 | scatterwalk_advance(&dd->out_walk, 4); | |
916 | if (dd->out_sg->length == _calc_walked(out)) { | |
5be4d4c9 | 917 | dd->out_sg = sg_next(dd->out_sg); |
e91aa9d5 JF |
918 | if (dd->out_sg) { |
919 | scatterwalk_start(&dd->out_walk, | |
920 | dd->out_sg); | |
921 | dst = sg_virt(dd->out_sg) + | |
922 | _calc_walked(out); | |
923 | } | |
924 | } else { | |
925 | dst++; | |
926 | } | |
927 | } | |
928 | ||
42d2e780 | 929 | BUG_ON(dd->total < DES_BLOCK_SIZE); |
e91aa9d5 | 930 | |
42d2e780 | 931 | dd->total -= DES_BLOCK_SIZE; |
e91aa9d5 JF |
932 | |
933 | /* Clear IRQ status */ | |
934 | status &= ~DES_REG_IRQ_DATA_OUT; | |
935 | omap_des_write(dd, DES_REG_IRQ_STATUS(dd), status); | |
936 | ||
937 | if (!dd->total) | |
938 | /* All bytes read! */ | |
939 | tasklet_schedule(&dd->done_task); | |
940 | else | |
941 | /* Enable DATA_IN interrupt for next block */ | |
942 | omap_des_write(dd, DES_REG_IRQ_ENABLE(dd), 0x2); | |
943 | } | |
944 | ||
945 | return IRQ_HANDLED; | |
946 | } | |
947 | ||
948 | static const struct of_device_id omap_des_of_match[] = { | |
949 | { | |
950 | .compatible = "ti,omap4-des", | |
951 | .data = &omap_des_pdata_omap4, | |
952 | }, | |
953 | {}, | |
954 | }; | |
955 | MODULE_DEVICE_TABLE(of, omap_des_of_match); | |
956 | ||
957 | static int omap_des_get_of(struct omap_des_dev *dd, | |
958 | struct platform_device *pdev) | |
959 | { | |
e91aa9d5 | 960 | |
7d556931 CL |
961 | dd->pdata = of_device_get_match_data(&pdev->dev); |
962 | if (!dd->pdata) { | |
e91aa9d5 JF |
963 | dev_err(&pdev->dev, "no compatible OF match\n"); |
964 | return -EINVAL; | |
965 | } | |
966 | ||
e91aa9d5 JF |
967 | return 0; |
968 | } | |
969 | #else | |
970 | static int omap_des_get_of(struct omap_des_dev *dd, | |
971 | struct device *dev) | |
972 | { | |
973 | return -EINVAL; | |
974 | } | |
975 | #endif | |
976 | ||
977 | static int omap_des_get_pdev(struct omap_des_dev *dd, | |
978 | struct platform_device *pdev) | |
979 | { | |
e91aa9d5 JF |
980 | /* non-DT devices get pdata from pdev */ |
981 | dd->pdata = pdev->dev.platform_data; | |
982 | ||
2f6f0680 | 983 | return 0; |
e91aa9d5 JF |
984 | } |
985 | ||
986 | static int omap_des_probe(struct platform_device *pdev) | |
987 | { | |
988 | struct device *dev = &pdev->dev; | |
989 | struct omap_des_dev *dd; | |
990 | struct crypto_alg *algp; | |
991 | struct resource *res; | |
992 | int err = -ENOMEM, i, j, irq = -1; | |
993 | u32 reg; | |
994 | ||
995 | dd = devm_kzalloc(dev, sizeof(struct omap_des_dev), GFP_KERNEL); | |
996 | if (dd == NULL) { | |
997 | dev_err(dev, "unable to alloc data struct.\n"); | |
998 | goto err_data; | |
999 | } | |
1000 | dd->dev = dev; | |
1001 | platform_set_drvdata(pdev, dd); | |
1002 | ||
e91aa9d5 JF |
1003 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
1004 | if (!res) { | |
1005 | dev_err(dev, "no MEM resource info\n"); | |
1006 | goto err_res; | |
1007 | } | |
1008 | ||
1009 | err = (dev->of_node) ? omap_des_get_of(dd, pdev) : | |
1010 | omap_des_get_pdev(dd, pdev); | |
1011 | if (err) | |
1012 | goto err_res; | |
1013 | ||
2496be2e JH |
1014 | dd->io_base = devm_ioremap_resource(dev, res); |
1015 | if (IS_ERR(dd->io_base)) { | |
1016 | err = PTR_ERR(dd->io_base); | |
e91aa9d5 JF |
1017 | goto err_res; |
1018 | } | |
1019 | dd->phys_base = res->start; | |
1020 | ||
418f2a8c TK |
1021 | pm_runtime_use_autosuspend(dev); |
1022 | pm_runtime_set_autosuspend_delay(dev, DEFAULT_AUTOSUSPEND_DELAY); | |
1023 | ||
e91aa9d5 | 1024 | pm_runtime_enable(dev); |
f51f593b NM |
1025 | err = pm_runtime_get_sync(dev); |
1026 | if (err < 0) { | |
1027 | pm_runtime_put_noidle(dev); | |
1028 | dev_err(dd->dev, "%s: failed to get_sync(%d)\n", __func__, err); | |
1029 | goto err_get; | |
1030 | } | |
e91aa9d5 JF |
1031 | |
1032 | omap_des_dma_stop(dd); | |
1033 | ||
1034 | reg = omap_des_read(dd, DES_REG_REV(dd)); | |
1035 | ||
1036 | pm_runtime_put_sync(dev); | |
1037 | ||
1038 | dev_info(dev, "OMAP DES hw accel rev: %u.%u\n", | |
1039 | (reg & dd->pdata->major_mask) >> dd->pdata->major_shift, | |
1040 | (reg & dd->pdata->minor_mask) >> dd->pdata->minor_shift); | |
1041 | ||
1042 | tasklet_init(&dd->done_task, omap_des_done_task, (unsigned long)dd); | |
e91aa9d5 JF |
1043 | |
1044 | err = omap_des_dma_init(dd); | |
2f6f0680 PU |
1045 | if (err == -EPROBE_DEFER) { |
1046 | goto err_irq; | |
1047 | } else if (err && DES_REG_IRQ_STATUS(dd) && DES_REG_IRQ_ENABLE(dd)) { | |
e91aa9d5 JF |
1048 | dd->pio_only = 1; |
1049 | ||
1050 | irq = platform_get_irq(pdev, 0); | |
1051 | if (irq < 0) { | |
3822c331 GS |
1052 | dev_err(dev, "can't get IRQ resource: %d\n", irq); |
1053 | err = irq; | |
e91aa9d5 JF |
1054 | goto err_irq; |
1055 | } | |
1056 | ||
1057 | err = devm_request_irq(dev, irq, omap_des_irq, 0, | |
1058 | dev_name(dev), dd); | |
1059 | if (err) { | |
1060 | dev_err(dev, "Unable to grab omap-des IRQ\n"); | |
1061 | goto err_irq; | |
1062 | } | |
1063 | } | |
1064 | ||
1065 | ||
1066 | INIT_LIST_HEAD(&dd->list); | |
1067 | spin_lock(&list_lock); | |
1068 | list_add_tail(&dd->list, &dev_list); | |
1069 | spin_unlock(&list_lock); | |
1070 | ||
1d1f98d1 TK |
1071 | /* Initialize des crypto engine */ |
1072 | dd->engine = crypto_engine_alloc_init(dev, 1); | |
59af1566 WY |
1073 | if (!dd->engine) { |
1074 | err = -ENOMEM; | |
1d1f98d1 | 1075 | goto err_engine; |
59af1566 | 1076 | } |
1d1f98d1 | 1077 | |
1d1f98d1 TK |
1078 | err = crypto_engine_start(dd->engine); |
1079 | if (err) | |
1080 | goto err_engine; | |
1081 | ||
e91aa9d5 JF |
1082 | for (i = 0; i < dd->pdata->algs_info_size; i++) { |
1083 | for (j = 0; j < dd->pdata->algs_info[i].size; j++) { | |
1084 | algp = &dd->pdata->algs_info[i].algs_list[j]; | |
1085 | ||
1086 | pr_debug("reg alg: %s\n", algp->cra_name); | |
e91aa9d5 JF |
1087 | |
1088 | err = crypto_register_alg(algp); | |
1089 | if (err) | |
1090 | goto err_algs; | |
1091 | ||
1092 | dd->pdata->algs_info[i].registered++; | |
1093 | } | |
1094 | } | |
1095 | ||
1096 | return 0; | |
f1b77aac | 1097 | |
e91aa9d5 JF |
1098 | err_algs: |
1099 | for (i = dd->pdata->algs_info_size - 1; i >= 0; i--) | |
1100 | for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--) | |
1101 | crypto_unregister_alg( | |
1102 | &dd->pdata->algs_info[i].algs_list[j]); | |
2f6f0680 | 1103 | |
1d1f98d1 TK |
1104 | err_engine: |
1105 | if (dd->engine) | |
1106 | crypto_engine_exit(dd->engine); | |
1107 | ||
2f6f0680 | 1108 | omap_des_dma_cleanup(dd); |
e91aa9d5 JF |
1109 | err_irq: |
1110 | tasklet_kill(&dd->done_task); | |
f51f593b | 1111 | err_get: |
e91aa9d5 JF |
1112 | pm_runtime_disable(dev); |
1113 | err_res: | |
1114 | dd = NULL; | |
1115 | err_data: | |
1116 | dev_err(dev, "initialization failed.\n"); | |
1117 | return err; | |
1118 | } | |
1119 | ||
1120 | static int omap_des_remove(struct platform_device *pdev) | |
1121 | { | |
1122 | struct omap_des_dev *dd = platform_get_drvdata(pdev); | |
1123 | int i, j; | |
1124 | ||
1125 | if (!dd) | |
1126 | return -ENODEV; | |
1127 | ||
1128 | spin_lock(&list_lock); | |
1129 | list_del(&dd->list); | |
1130 | spin_unlock(&list_lock); | |
1131 | ||
1132 | for (i = dd->pdata->algs_info_size - 1; i >= 0; i--) | |
1133 | for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--) | |
1134 | crypto_unregister_alg( | |
1135 | &dd->pdata->algs_info[i].algs_list[j]); | |
1136 | ||
1137 | tasklet_kill(&dd->done_task); | |
e91aa9d5 JF |
1138 | omap_des_dma_cleanup(dd); |
1139 | pm_runtime_disable(dd->dev); | |
1140 | dd = NULL; | |
1141 | ||
1142 | return 0; | |
1143 | } | |
1144 | ||
1145 | #ifdef CONFIG_PM_SLEEP | |
1146 | static int omap_des_suspend(struct device *dev) | |
1147 | { | |
1148 | pm_runtime_put_sync(dev); | |
1149 | return 0; | |
1150 | } | |
1151 | ||
1152 | static int omap_des_resume(struct device *dev) | |
1153 | { | |
f51f593b NM |
1154 | int err; |
1155 | ||
1156 | err = pm_runtime_get_sync(dev); | |
1157 | if (err < 0) { | |
1158 | pm_runtime_put_noidle(dev); | |
1159 | dev_err(dev, "%s: failed to get_sync(%d)\n", __func__, err); | |
1160 | return err; | |
1161 | } | |
e91aa9d5 JF |
1162 | return 0; |
1163 | } | |
1164 | #endif | |
1165 | ||
e78f9193 | 1166 | static SIMPLE_DEV_PM_OPS(omap_des_pm_ops, omap_des_suspend, omap_des_resume); |
e91aa9d5 JF |
1167 | |
1168 | static struct platform_driver omap_des_driver = { | |
1169 | .probe = omap_des_probe, | |
1170 | .remove = omap_des_remove, | |
1171 | .driver = { | |
1172 | .name = "omap-des", | |
e91aa9d5 JF |
1173 | .pm = &omap_des_pm_ops, |
1174 | .of_match_table = of_match_ptr(omap_des_of_match), | |
1175 | }, | |
1176 | }; | |
1177 | ||
1178 | module_platform_driver(omap_des_driver); | |
1179 | ||
1180 | MODULE_DESCRIPTION("OMAP DES hw acceleration support."); | |
1181 | MODULE_LICENSE("GPL v2"); | |
1182 | MODULE_AUTHOR("Joel Fernandes <joelf@ti.com>"); |