3  * sun4i-ss-hash.c - hardware cryptographic accelerator for Allwinner A20 SoC
11 #include "sun4i-ss.h"
28 	op->ss = algt->ss;  in sun4i_hash_crainit()
30 	err = pm_runtime_get_sync(op->ss->dev);  in sun4i_hash_crainit()
43 	pm_runtime_put(op->ss->dev);  in sun4i_hash_craexit()
154  * Write data by step of 32bits and put then in the SS.
160  * So the first work is to get the number of bytes to write to SS modulo 64
195 	struct sun4i_ss_ctx *ss = tfmctx->ss;  in sun4i_hash()  local
202 	dev_dbg(ss->dev, "%s %s bc=%llu len=%u mode=%x wl=%u h0=%0x",  in sun4i_hash()
212 		dev_err(ss->dev, "Cannot process too large request\n");  in sun4i_hash()
224 	spin_lock_bh(&ss->slock);  in sun4i_hash()
233 			writel(op->hash[i], ss->base + SS_IV0 + i * 4);  in sun4i_hash()
236 	writel(op->mode | SS_ENABLED | ivmode, ss->base + SS_CTL);  in sun4i_hash()
246 			dev_err(ss->dev, "ERROR: Bound error %u %u\n",  in sun4i_hash()
267 		dev_dbg(ss->dev, "We can DMA\n");  in sun4i_hash()
302 				writesl(ss->base + SS_RXFIFO, op->buf,  in sun4i_hash()
314 			writesl(ss->base + SS_RXFIFO, mi.addr + in_i, todo);  in sun4i_hash()
320 				spaces = readl(ss->base + SS_FCSR);  in sun4i_hash()
360 	writel(op->mode | SS_ENABLED | SS_DATA_END, ss->base + SS_CTL);  in sun4i_hash()
363 		v = readl(ss->base + SS_CTL);  in sun4i_hash()
367 		dev_err_ratelimited(ss->dev,  in sun4i_hash()
384 		op->hash[i] = readl(ss->base + SS_MD0 + i * 4);  in sun4i_hash()
392  * Then ask the SS for finalizing the hashing operation  in sun4i_hash()
397  * 3 remaining bytes to write and SS is fast enough to not care about it.  in sun4i_hash()
406 			writesl(ss->base + SS_RXFIFO, op->buf, nwait);  in sun4i_hash()
448 	writesl(ss->base + SS_RXFIFO, bf, j);  in sun4i_hash()
450 	/* Tell the SS to stop the hashing */  in sun4i_hash()
451 	writel(op->mode | SS_ENABLED | SS_DATA_END, ss->base + SS_CTL);  in sun4i_hash()
454 	 * Wait for SS to finish the hash.  in sun4i_hash()
460 		v = readl(ss->base + SS_CTL);  in sun4i_hash()
464 		dev_err_ratelimited(ss->dev,  in sun4i_hash()
483 			v = readl(ss->base + SS_MD0 + i * 4);  in sun4i_hash()
484 			if (ss->variant->sha1_in_be)  in sun4i_hash()
491 			v = readl(ss->base + SS_MD0 + i * 4);  in sun4i_hash()
497 	writel(0, ss->base + SS_CTL);  in sun4i_hash()
498 	spin_unlock_bh(&ss->slock);  in sun4i_hash()