crypto: ux500/cryp - delete driver

It turns out we can just modify the newer STM32 CRYP driver
to be used with Ux500 and now that we have done that, delete
the old and sparsely maintained Ux500 CRYP driver.

Cc: Lionel Debieve <lionel.debieve@foss.st.com>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Alexandre Torgue <alexandre.torgue@foss.st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 0 insertions, 394 deletions

diff --git a/drivers/crypto/ux500/cryp/cryp.c b/drivers/crypto/ux500/cryp/cryp.c
deleted file mode 100644
index 759d0d9786fd..000000000000
--- a/drivers/crypto/ux500/cryp/cryp.c
+++ /dev/null
@@ -1,394 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (C) ST-Ericsson SA 2010
- * Author: Shujuan Chen <shujuan.chen@stericsson.com> for ST-Ericsson.
- * Author: Jonas Linde <jonas.linde@stericsson.com> for ST-Ericsson.
- * Author: Niklas Hernaeus <niklas.hernaeus@stericsson.com> for ST-Ericsson.
- * Author: Joakim Bech <joakim.xx.bech@stericsson.com> for ST-Ericsson.
- * Author: Berne Hebark <berne.herbark@stericsson.com> for ST-Ericsson.
- */
-
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-
-#include "cryp_p.h"
-#include "cryp.h"
-
-/*
- * cryp_wait_until_done - wait until the device logic is not busy
- */
-void cryp_wait_until_done(struct cryp_device_data *device_data)
-{
-	while (cryp_is_logic_busy(device_data))
-		cpu_relax();
-}
-
-/**
- * cryp_check - This routine checks Peripheral and PCell Id
- * @device_data: Pointer to the device data struct for base address.
- */
-int cryp_check(struct cryp_device_data *device_data)
-{
-	int peripheralid2 = 0;
-
-	if (NULL == device_data)
-		return -EINVAL;
-
-	peripheralid2 = readl_relaxed(&device_data->base->periphId2);
-
-	if (peripheralid2 != CRYP_PERIPHERAL_ID2_DB8500)
-		return -EPERM;
-
-	/* Check Peripheral and Pcell Id Register for CRYP */
-	if ((CRYP_PERIPHERAL_ID0 ==
-		readl_relaxed(&device_data->base->periphId0))
-	    && (CRYP_PERIPHERAL_ID1 ==
-		    readl_relaxed(&device_data->base->periphId1))
-	    && (CRYP_PERIPHERAL_ID3 ==
-		    readl_relaxed(&device_data->base->periphId3))
-	    && (CRYP_PCELL_ID0 ==
-		    readl_relaxed(&device_data->base->pcellId0))
-	    && (CRYP_PCELL_ID1 ==
-		    readl_relaxed(&device_data->base->pcellId1))
-	    && (CRYP_PCELL_ID2 ==
-		    readl_relaxed(&device_data->base->pcellId2))
-	    && (CRYP_PCELL_ID3 ==
-		    readl_relaxed(&device_data->base->pcellId3))) {
-		return 0;
-	}
-
-	return -EPERM;
-}
-
-/**
- * cryp_activity - This routine enables/disable the cryptography function.
- * @device_data: Pointer to the device data struct for base address.
- * @cryp_crypen: Enable/Disable functionality
- */
-void cryp_activity(struct cryp_device_data *device_data,
-		   enum cryp_crypen cryp_crypen)
-{
-	CRYP_PUT_BITS(&device_data->base->cr,
-		      cryp_crypen,
-		      CRYP_CR_CRYPEN_POS,
-		      CRYP_CR_CRYPEN_MASK);
-}
-
-/**
- * cryp_flush_inoutfifo - Resets both the input and the output FIFOs
- * @device_data: Pointer to the device data struct for base address.
- */
-void cryp_flush_inoutfifo(struct cryp_device_data *device_data)
-{
-	/*
-	 * We always need to disable the hardware before trying to flush the
-	 * FIFO. This is something that isn't written in the design
-	 * specification, but we have been informed by the hardware designers
-	 * that this must be done.
-	 */
-	cryp_activity(device_data, CRYP_CRYPEN_DISABLE);
-	cryp_wait_until_done(device_data);
-
-	CRYP_SET_BITS(&device_data->base->cr, CRYP_CR_FFLUSH_MASK);
-	/*
-	 * CRYP_SR_INFIFO_READY_MASK is the expected value on the status
-	 * register when starting a new calculation, which means Input FIFO is
-	 * not full and input FIFO is empty.
-	 */
-	while (readl_relaxed(&device_data->base->sr) !=
-	       CRYP_SR_INFIFO_READY_MASK)
-		cpu_relax();
-}
-
-/**
- * cryp_set_configuration - This routine set the cr CRYP IP
- * @device_data: Pointer to the device data struct for base address.
- * @cryp_config: Pointer to the configuration parameter
- * @control_register: The control register to be written later on.
- */
-int cryp_set_configuration(struct cryp_device_data *device_data,
-			   struct cryp_config *cryp_config,
-			   u32 *control_register)
-{
-	u32 cr_for_kse;
-
-	if (NULL == device_data || NULL == cryp_config)
-		return -EINVAL;
-
-	*control_register |= (cryp_config->keysize << CRYP_CR_KEYSIZE_POS);
-
-	/* Prepare key for decryption in AES_ECB and AES_CBC mode. */
-	if ((CRYP_ALGORITHM_DECRYPT == cryp_config->algodir) &&
-	    ((CRYP_ALGO_AES_ECB == cryp_config->algomode) ||
-	     (CRYP_ALGO_AES_CBC == cryp_config->algomode))) {
-		cr_for_kse = *control_register;
-		/*
-		 * This seems a bit odd, but it is indeed needed to set this to
-		 * encrypt even though it is a decryption that we are doing. It
-		 * also mentioned in the design spec that you need to do this.
-		 * After the keyprepartion for decrypting is done you should set
-		 * algodir back to decryption, which is done outside this if
-		 * statement.
-		 *
-		 * According to design specification we should set mode ECB
-		 * during key preparation even though we might be running CBC
-		 * when enter this function.
-		 *
-		 * Writing to KSE_ENABLED will drop CRYPEN when key preparation
-		 * is done. Therefore we need to set CRYPEN again outside this
-		 * if statement when running decryption.
-		 */
-		cr_for_kse |= ((CRYP_ALGORITHM_ENCRYPT << CRYP_CR_ALGODIR_POS) |
-			       (CRYP_ALGO_AES_ECB << CRYP_CR_ALGOMODE_POS) |
-			       (CRYP_CRYPEN_ENABLE << CRYP_CR_CRYPEN_POS) |
-			       (KSE_ENABLED << CRYP_CR_KSE_POS));
-
-		writel_relaxed(cr_for_kse, &device_data->base->cr);
-		cryp_wait_until_done(device_data);
-	}
-
-	*control_register |=
-		((cryp_config->algomode << CRYP_CR_ALGOMODE_POS) |
-		 (cryp_config->algodir << CRYP_CR_ALGODIR_POS));
-
-	return 0;
-}
-
-/**
- * cryp_configure_protection - set the protection bits in the CRYP logic.
- * @device_data: Pointer to the device data struct for base address.
- * @p_protect_config:	Pointer to the protection mode and
- *			secure mode configuration
- */
-int cryp_configure_protection(struct cryp_device_data *device_data,
-			      struct cryp_protection_config *p_protect_config)
-{
-	if (NULL == p_protect_config)
-		return -EINVAL;
-
-	CRYP_WRITE_BIT(&device_data->base->cr,
-		       (u32) p_protect_config->secure_access,
-		       CRYP_CR_SECURE_MASK);
-	CRYP_PUT_BITS(&device_data->base->cr,
-		      p_protect_config->privilege_access,
-		      CRYP_CR_PRLG_POS,
-		      CRYP_CR_PRLG_MASK);
-
-	return 0;
-}
-
-/**
- * cryp_is_logic_busy - returns the busy status of the CRYP logic
- * @device_data: Pointer to the device data struct for base address.
- */
-int cryp_is_logic_busy(struct cryp_device_data *device_data)
-{
-	return CRYP_TEST_BITS(&device_data->base->sr,
-			      CRYP_SR_BUSY_MASK);
-}
-
-/**
- * cryp_configure_for_dma - configures the CRYP IP for DMA operation
- * @device_data: Pointer to the device data struct for base address.
- * @dma_req: Specifies the DMA request type value.
- */
-void cryp_configure_for_dma(struct cryp_device_data *device_data,
-			    enum cryp_dma_req_type dma_req)
-{
-	CRYP_SET_BITS(&device_data->base->dmacr,
-		      (u32) dma_req);
-}
-
-/**
- * cryp_configure_key_values - configures the key values for CRYP operations
- * @device_data: Pointer to the device data struct for base address.
- * @key_reg_index: Key value index register
- * @key_value: The key value struct
- */
-int cryp_configure_key_values(struct cryp_device_data *device_data,
-			      enum cryp_key_reg_index key_reg_index,
-			      struct cryp_key_value key_value)
-{
-	while (cryp_is_logic_busy(device_data))
-		cpu_relax();
-
-	switch (key_reg_index) {
-	case CRYP_KEY_REG_1:
-		writel_relaxed(key_value.key_value_left,
-				&device_data->base->key_1_l);
-		writel_relaxed(key_value.key_value_right,
-				&device_data->base->key_1_r);
-		break;
-	case CRYP_KEY_REG_2:
-		writel_relaxed(key_value.key_value_left,
-				&device_data->base->key_2_l);
-		writel_relaxed(key_value.key_value_right,
-				&device_data->base->key_2_r);
-		break;
-	case CRYP_KEY_REG_3:
-		writel_relaxed(key_value.key_value_left,
-				&device_data->base->key_3_l);
-		writel_relaxed(key_value.key_value_right,
-				&device_data->base->key_3_r);
-		break;
-	case CRYP_KEY_REG_4:
-		writel_relaxed(key_value.key_value_left,
-				&device_data->base->key_4_l);
-		writel_relaxed(key_value.key_value_right,
-				&device_data->base->key_4_r);
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-/**
- * cryp_configure_init_vector - configures the initialization vector register
- * @device_data: Pointer to the device data struct for base address.
- * @init_vector_index: Specifies the index of the init vector.
- * @init_vector_value: Specifies the value for the init vector.
- */
-int cryp_configure_init_vector(struct cryp_device_data *device_data,
-			       enum cryp_init_vector_index
-			       init_vector_index,
-			       struct cryp_init_vector_value
-			       init_vector_value)
-{
-	while (cryp_is_logic_busy(device_data))
-		cpu_relax();
-
-	switch (init_vector_index) {
-	case CRYP_INIT_VECTOR_INDEX_0:
-		writel_relaxed(init_vector_value.init_value_left,
-		       &device_data->base->init_vect_0_l);
-		writel_relaxed(init_vector_value.init_value_right,
-		       &device_data->base->init_vect_0_r);
-		break;
-	case CRYP_INIT_VECTOR_INDEX_1:
-		writel_relaxed(init_vector_value.init_value_left,
-		       &device_data->base->init_vect_1_l);
-		writel_relaxed(init_vector_value.init_value_right,
-		       &device_data->base->init_vect_1_r);
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-/**
- * cryp_save_device_context -	Store hardware registers and
- *				other device context parameter
- * @device_data: Pointer to the device data struct for base address.
- * @ctx: Crypto device context
- * @cryp_mode: Mode: Polling, Interrupt or DMA
- */
-void cryp_save_device_context(struct cryp_device_data *device_data,
-			      struct cryp_device_context *ctx,
-			      int cryp_mode)
-{
-	enum cryp_algo_mode algomode;
-	struct cryp_register __iomem *src_reg = device_data->base;
-	struct cryp_config *config =
-		(struct cryp_config *)device_data->current_ctx;
-
-	/*
-	 * Always start by disable the hardware and wait for it to finish the
-	 * ongoing calculations before trying to reprogram it.
-	 */
-	cryp_activity(device_data, CRYP_CRYPEN_DISABLE);
-	cryp_wait_until_done(device_data);
-
-	if (cryp_mode == CRYP_MODE_DMA)
-		cryp_configure_for_dma(device_data, CRYP_DMA_DISABLE_BOTH);
-
-	if (CRYP_TEST_BITS(&src_reg->sr, CRYP_SR_IFEM_MASK) == 0)
-		ctx->din = readl_relaxed(&src_reg->din);
-
-	ctx->cr = readl_relaxed(&src_reg->cr) & CRYP_CR_CONTEXT_SAVE_MASK;
-
-	switch (config->keysize) {
-	case CRYP_KEY_SIZE_256:
-		ctx->key_4_l = readl_relaxed(&src_reg->key_4_l);
-		ctx->key_4_r = readl_relaxed(&src_reg->key_4_r);
-		fallthrough;
-
-	case CRYP_KEY_SIZE_192:
-		ctx->key_3_l = readl_relaxed(&src_reg->key_3_l);
-		ctx->key_3_r = readl_relaxed(&src_reg->key_3_r);
-		fallthrough;
-
-	case CRYP_KEY_SIZE_128:
-		ctx->key_2_l = readl_relaxed(&src_reg->key_2_l);
-		ctx->key_2_r = readl_relaxed(&src_reg->key_2_r);
-		fallthrough;
-
-	default:
-		ctx->key_1_l = readl_relaxed(&src_reg->key_1_l);
-		ctx->key_1_r = readl_relaxed(&src_reg->key_1_r);
-	}
-
-	/* Save IV for CBC mode for both AES and DES. */
-	algomode = ((ctx->cr & CRYP_CR_ALGOMODE_MASK) >> CRYP_CR_ALGOMODE_POS);
-	if (algomode == CRYP_ALGO_TDES_CBC ||
-	    algomode == CRYP_ALGO_DES_CBC ||
-	    algomode == CRYP_ALGO_AES_CBC) {
-		ctx->init_vect_0_l = readl_relaxed(&src_reg->init_vect_0_l);
-		ctx->init_vect_0_r = readl_relaxed(&src_reg->init_vect_0_r);
-		ctx->init_vect_1_l = readl_relaxed(&src_reg->init_vect_1_l);
-		ctx->init_vect_1_r = readl_relaxed(&src_reg->init_vect_1_r);
-	}
-}
-
-/**
- * cryp_restore_device_context -	Restore hardware registers and
- *					other device context parameter
- * @device_data: Pointer to the device data struct for base address.
- * @ctx: Crypto device context
- */
-void cryp_restore_device_context(struct cryp_device_data *device_data,
-				 struct cryp_device_context *ctx)
-{
-	struct cryp_register __iomem *reg = device_data->base;
-	struct cryp_config *config =
-		(struct cryp_config *)device_data->current_ctx;
-
-	/*
-	 * Fall through for all items in switch statement. DES is captured in
-	 * the default.
-	 */
-	switch (config->keysize) {
-	case CRYP_KEY_SIZE_256:
-		writel_relaxed(ctx->key_4_l, &reg->key_4_l);
-		writel_relaxed(ctx->key_4_r, &reg->key_4_r);
-		fallthrough;
-
-	case CRYP_KEY_SIZE_192:
-		writel_relaxed(ctx->key_3_l, &reg->key_3_l);
-		writel_relaxed(ctx->key_3_r, &reg->key_3_r);
-		fallthrough;
-
-	case CRYP_KEY_SIZE_128:
-		writel_relaxed(ctx->key_2_l, &reg->key_2_l);
-		writel_relaxed(ctx->key_2_r, &reg->key_2_r);
-		fallthrough;
-
-	default:
-		writel_relaxed(ctx->key_1_l, &reg->key_1_l);
-		writel_relaxed(ctx->key_1_r, &reg->key_1_r);
-	}
-
-	/* Restore IV for CBC mode for AES and DES. */
-	if (config->algomode == CRYP_ALGO_TDES_CBC ||
-	    config->algomode == CRYP_ALGO_DES_CBC ||
-	    config->algomode == CRYP_ALGO_AES_CBC) {
-		writel_relaxed(ctx->init_vect_0_l, &reg->init_vect_0_l);
-		writel_relaxed(ctx->init_vect_0_r, &reg->init_vect_0_r);
-		writel_relaxed(ctx->init_vect_1_l, &reg->init_vect_1_l);
-		writel_relaxed(ctx->init_vect_1_r, &reg->init_vect_1_r);
-	}
-}