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Diffstat (limited to 'drivers/crypto/ux500/cryp/cryp.c')
-rw-r--r--drivers/crypto/ux500/cryp/cryp.c394
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);
- }
-}
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