diff options
Diffstat (limited to 'drivers/crypto/ux500/cryp/cryp_core.c')
-rw-r--r-- | drivers/crypto/ux500/cryp/cryp_core.c | 1600 |
1 files changed, 0 insertions, 1600 deletions
diff --git a/drivers/crypto/ux500/cryp/cryp_core.c b/drivers/crypto/ux500/cryp/cryp_core.c deleted file mode 100644 index 5a57c9afd8c8..000000000000 --- a/drivers/crypto/ux500/cryp/cryp_core.c +++ /dev/null @@ -1,1600 +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: Joakim Bech <joakim.xx.bech@stericsson.com> for ST-Ericsson. - * Author: Berne Hebark <berne.herbark@stericsson.com> for ST-Ericsson. - * Author: Niklas Hernaeus <niklas.hernaeus@stericsson.com> for ST-Ericsson. - * Author: Jonas Linde <jonas.linde@stericsson.com> for ST-Ericsson. - * Author: Andreas Westin <andreas.westin@stericsson.com> for ST-Ericsson. - */ - -#include <linux/clk.h> -#include <linux/completion.h> -#include <linux/device.h> -#include <linux/dma-mapping.h> -#include <linux/dmaengine.h> -#include <linux/err.h> -#include <linux/errno.h> -#include <linux/interrupt.h> -#include <linux/io.h> -#include <linux/irqreturn.h> -#include <linux/kernel.h> -#include <linux/klist.h> -#include <linux/module.h> -#include <linux/mod_devicetable.h> -#include <linux/platform_device.h> -#include <linux/regulator/consumer.h> -#include <linux/semaphore.h> -#include <linux/platform_data/dma-ste-dma40.h> - -#include <crypto/aes.h> -#include <crypto/ctr.h> -#include <crypto/internal/des.h> -#include <crypto/internal/skcipher.h> -#include <crypto/scatterwalk.h> - -#include <linux/platform_data/crypto-ux500.h> - -#include "cryp_p.h" -#include "cryp.h" - -#define CRYP_MAX_KEY_SIZE 32 -#define BYTES_PER_WORD 4 - -static int cryp_mode; -static atomic_t session_id; - -static struct stedma40_chan_cfg *mem_to_engine; -static struct stedma40_chan_cfg *engine_to_mem; - -/** - * struct cryp_driver_data - data specific to the driver. - * - * @device_list: A list of registered devices to choose from. - * @device_allocation: A semaphore initialized with number of devices. - */ -struct cryp_driver_data { - struct klist device_list; - struct semaphore device_allocation; -}; - -/** - * struct cryp_ctx - Crypto context - * @config: Crypto mode. - * @key: Key array. - * @keylen: Length of key. - * @iv: Pointer to initialization vector. - * @indata: Pointer to indata. - * @outdata: Pointer to outdata. - * @datalen: Length of indata. - * @outlen: Length of outdata. - * @blocksize: Size of blocks. - * @updated: Updated flag. - * @dev_ctx: Device dependent context. - * @device: Pointer to the device. - * @session_id: Atomic session ID. - */ -struct cryp_ctx { - struct cryp_config config; - u8 key[CRYP_MAX_KEY_SIZE]; - u32 keylen; - u8 *iv; - const u8 *indata; - u8 *outdata; - u32 datalen; - u32 outlen; - u32 blocksize; - u8 updated; - struct cryp_device_context dev_ctx; - struct cryp_device_data *device; - u32 session_id; -}; - -static struct cryp_driver_data driver_data; - -/** - * swap_bits_in_byte - mirror the bits in a byte - * @b: the byte to be mirrored - * - * The bits are swapped the following way: - * Byte b include bits 0-7, nibble 1 (n1) include bits 0-3 and - * nibble 2 (n2) bits 4-7. - * - * Nibble 1 (n1): - * (The "old" (moved) bit is replaced with a zero) - * 1. Move bit 6 and 7, 4 positions to the left. - * 2. Move bit 3 and 5, 2 positions to the left. - * 3. Move bit 1-4, 1 position to the left. - * - * Nibble 2 (n2): - * 1. Move bit 0 and 1, 4 positions to the right. - * 2. Move bit 2 and 4, 2 positions to the right. - * 3. Move bit 3-6, 1 position to the right. - * - * Combine the two nibbles to a complete and swapped byte. - */ - -static inline u8 swap_bits_in_byte(u8 b) -{ -#define R_SHIFT_4_MASK 0xc0 /* Bits 6 and 7, right shift 4 */ -#define R_SHIFT_2_MASK 0x28 /* (After right shift 4) Bits 3 and 5, - right shift 2 */ -#define R_SHIFT_1_MASK 0x1e /* (After right shift 2) Bits 1-4, - right shift 1 */ -#define L_SHIFT_4_MASK 0x03 /* Bits 0 and 1, left shift 4 */ -#define L_SHIFT_2_MASK 0x14 /* (After left shift 4) Bits 2 and 4, - left shift 2 */ -#define L_SHIFT_1_MASK 0x78 /* (After left shift 1) Bits 3-6, - left shift 1 */ - - u8 n1; - u8 n2; - - /* Swap most significant nibble */ - /* Right shift 4, bits 6 and 7 */ - n1 = ((b & R_SHIFT_4_MASK) >> 4) | (b & ~(R_SHIFT_4_MASK >> 4)); - /* Right shift 2, bits 3 and 5 */ - n1 = ((n1 & R_SHIFT_2_MASK) >> 2) | (n1 & ~(R_SHIFT_2_MASK >> 2)); - /* Right shift 1, bits 1-4 */ - n1 = (n1 & R_SHIFT_1_MASK) >> 1; - - /* Swap least significant nibble */ - /* Left shift 4, bits 0 and 1 */ - n2 = ((b & L_SHIFT_4_MASK) << 4) | (b & ~(L_SHIFT_4_MASK << 4)); - /* Left shift 2, bits 2 and 4 */ - n2 = ((n2 & L_SHIFT_2_MASK) << 2) | (n2 & ~(L_SHIFT_2_MASK << 2)); - /* Left shift 1, bits 3-6 */ - n2 = (n2 & L_SHIFT_1_MASK) << 1; - - return n1 | n2; -} - -static inline void swap_words_in_key_and_bits_in_byte(const u8 *in, - u8 *out, u32 len) -{ - unsigned int i = 0; - int j; - int index = 0; - - j = len - BYTES_PER_WORD; - while (j >= 0) { - for (i = 0; i < BYTES_PER_WORD; i++) { - index = len - j - BYTES_PER_WORD + i; - out[j + i] = - swap_bits_in_byte(in[index]); - } - j -= BYTES_PER_WORD; - } -} - -static void add_session_id(struct cryp_ctx *ctx) -{ - /* - * We never want 0 to be a valid value, since this is the default value - * for the software context. - */ - if (unlikely(atomic_inc_and_test(&session_id))) - atomic_inc(&session_id); - - ctx->session_id = atomic_read(&session_id); -} - -static irqreturn_t cryp_interrupt_handler(int irq, void *param) -{ - struct cryp_ctx *ctx; - int count; - struct cryp_device_data *device_data; - - if (param == NULL) { - BUG_ON(!param); - return IRQ_HANDLED; - } - - /* The device is coming from the one found in hw_crypt_noxts. */ - device_data = (struct cryp_device_data *)param; - - ctx = device_data->current_ctx; - - if (ctx == NULL) { - BUG_ON(!ctx); - return IRQ_HANDLED; - } - - dev_dbg(ctx->device->dev, "[%s] (len: %d) %s, ", __func__, ctx->outlen, - cryp_pending_irq_src(device_data, CRYP_IRQ_SRC_OUTPUT_FIFO) ? - "out" : "in"); - - if (cryp_pending_irq_src(device_data, - CRYP_IRQ_SRC_OUTPUT_FIFO)) { - if (ctx->outlen / ctx->blocksize > 0) { - count = ctx->blocksize / 4; - - readsl(&device_data->base->dout, ctx->outdata, count); - ctx->outdata += count; - ctx->outlen -= count; - - if (ctx->outlen == 0) { - cryp_disable_irq_src(device_data, - CRYP_IRQ_SRC_OUTPUT_FIFO); - } - } - } else if (cryp_pending_irq_src(device_data, - CRYP_IRQ_SRC_INPUT_FIFO)) { - if (ctx->datalen / ctx->blocksize > 0) { - count = ctx->blocksize / 4; - - writesl(&device_data->base->din, ctx->indata, count); - - ctx->indata += count; - ctx->datalen -= count; - - if (ctx->datalen == 0) - cryp_disable_irq_src(device_data, - CRYP_IRQ_SRC_INPUT_FIFO); - - if (ctx->config.algomode == CRYP_ALGO_AES_XTS) { - CRYP_PUT_BITS(&device_data->base->cr, - CRYP_START_ENABLE, - CRYP_CR_START_POS, - CRYP_CR_START_MASK); - - cryp_wait_until_done(device_data); - } - } - } - - return IRQ_HANDLED; -} - -static int mode_is_aes(enum cryp_algo_mode mode) -{ - return CRYP_ALGO_AES_ECB == mode || - CRYP_ALGO_AES_CBC == mode || - CRYP_ALGO_AES_CTR == mode || - CRYP_ALGO_AES_XTS == mode; -} - -static int cfg_iv(struct cryp_device_data *device_data, u32 left, u32 right, - enum cryp_init_vector_index index) -{ - struct cryp_init_vector_value vector_value; - - dev_dbg(device_data->dev, "[%s]", __func__); - - vector_value.init_value_left = left; - vector_value.init_value_right = right; - - return cryp_configure_init_vector(device_data, - index, - vector_value); -} - -static int cfg_ivs(struct cryp_device_data *device_data, struct cryp_ctx *ctx) -{ - int i; - int status = 0; - int num_of_regs = ctx->blocksize / 8; - __be32 *civ = (__be32 *)ctx->iv; - u32 iv[AES_BLOCK_SIZE / 4]; - - dev_dbg(device_data->dev, "[%s]", __func__); - - /* - * Since we loop on num_of_regs we need to have a check in case - * someone provides an incorrect blocksize which would force calling - * cfg_iv with i greater than 2 which is an error. - */ - if (num_of_regs > 2) { - dev_err(device_data->dev, "[%s] Incorrect blocksize %d", - __func__, ctx->blocksize); - return -EINVAL; - } - - for (i = 0; i < ctx->blocksize / 4; i++) - iv[i] = be32_to_cpup(civ + i); - - for (i = 0; i < num_of_regs; i++) { - status = cfg_iv(device_data, iv[i*2], iv[i*2+1], - (enum cryp_init_vector_index) i); - if (status != 0) - return status; - } - return status; -} - -static int set_key(struct cryp_device_data *device_data, - u32 left_key, - u32 right_key, - enum cryp_key_reg_index index) -{ - struct cryp_key_value key_value; - int cryp_error; - - dev_dbg(device_data->dev, "[%s]", __func__); - - key_value.key_value_left = left_key; - key_value.key_value_right = right_key; - - cryp_error = cryp_configure_key_values(device_data, - index, - key_value); - if (cryp_error != 0) - dev_err(device_data->dev, "[%s]: " - "cryp_configure_key_values() failed!", __func__); - - return cryp_error; -} - -static int cfg_keys(struct cryp_ctx *ctx) -{ - int i; - int num_of_regs = ctx->keylen / 8; - u32 swapped_key[CRYP_MAX_KEY_SIZE / 4]; - __be32 *ckey = (__be32 *)ctx->key; - int cryp_error = 0; - - dev_dbg(ctx->device->dev, "[%s]", __func__); - - if (mode_is_aes(ctx->config.algomode)) { - swap_words_in_key_and_bits_in_byte((u8 *)ckey, - (u8 *)swapped_key, - ctx->keylen); - } else { - for (i = 0; i < ctx->keylen / 4; i++) - swapped_key[i] = be32_to_cpup(ckey + i); - } - - for (i = 0; i < num_of_regs; i++) { - cryp_error = set_key(ctx->device, - swapped_key[i * 2], - swapped_key[i * 2 + 1], - (enum cryp_key_reg_index) i); - - if (cryp_error != 0) { - dev_err(ctx->device->dev, "[%s]: set_key() failed!", - __func__); - return cryp_error; - } - } - return cryp_error; -} - -static int cryp_setup_context(struct cryp_ctx *ctx, - struct cryp_device_data *device_data) -{ - u32 control_register = CRYP_CR_DEFAULT; - - switch (cryp_mode) { - case CRYP_MODE_INTERRUPT: - writel_relaxed(CRYP_IMSC_DEFAULT, &device_data->base->imsc); - break; - - case CRYP_MODE_DMA: - writel_relaxed(CRYP_DMACR_DEFAULT, &device_data->base->dmacr); - break; - - default: - break; - } - - if (ctx->updated == 0) { - cryp_flush_inoutfifo(device_data); - if (cfg_keys(ctx) != 0) { - dev_err(ctx->device->dev, "[%s]: cfg_keys failed!", - __func__); - return -EINVAL; - } - - if (ctx->iv && - CRYP_ALGO_AES_ECB != ctx->config.algomode && - CRYP_ALGO_DES_ECB != ctx->config.algomode && - CRYP_ALGO_TDES_ECB != ctx->config.algomode) { - if (cfg_ivs(device_data, ctx) != 0) - return -EPERM; - } - - cryp_set_configuration(device_data, &ctx->config, - &control_register); - add_session_id(ctx); - } else if (ctx->updated == 1 && - ctx->session_id != atomic_read(&session_id)) { - cryp_flush_inoutfifo(device_data); - cryp_restore_device_context(device_data, &ctx->dev_ctx); - - add_session_id(ctx); - control_register = ctx->dev_ctx.cr; - } else - control_register = ctx->dev_ctx.cr; - - writel(control_register | - (CRYP_CRYPEN_ENABLE << CRYP_CR_CRYPEN_POS), - &device_data->base->cr); - - return 0; -} - -static int cryp_get_device_data(struct cryp_ctx *ctx, - struct cryp_device_data **device_data) -{ - int ret; - struct klist_iter device_iterator; - struct klist_node *device_node; - struct cryp_device_data *local_device_data = NULL; - pr_debug(DEV_DBG_NAME " [%s]", __func__); - - /* Wait until a device is available */ - ret = down_interruptible(&driver_data.device_allocation); - if (ret) - return ret; /* Interrupted */ - - /* Select a device */ - klist_iter_init(&driver_data.device_list, &device_iterator); - - device_node = klist_next(&device_iterator); - while (device_node) { - local_device_data = container_of(device_node, - struct cryp_device_data, list_node); - spin_lock(&local_device_data->ctx_lock); - /* current_ctx allocates a device, NULL = unallocated */ - if (local_device_data->current_ctx) { - device_node = klist_next(&device_iterator); - } else { - local_device_data->current_ctx = ctx; - ctx->device = local_device_data; - spin_unlock(&local_device_data->ctx_lock); - break; - } - spin_unlock(&local_device_data->ctx_lock); - } - klist_iter_exit(&device_iterator); - - if (!device_node) { - /** - * No free device found. - * Since we allocated a device with down_interruptible, this - * should not be able to happen. - * Number of available devices, which are contained in - * device_allocation, is therefore decremented by not doing - * an up(device_allocation). - */ - return -EBUSY; - } - - *device_data = local_device_data; - - return 0; -} - -static void cryp_dma_setup_channel(struct cryp_device_data *device_data, - struct device *dev) -{ - struct dma_slave_config mem2cryp = { - .direction = DMA_MEM_TO_DEV, - .dst_addr = device_data->phybase + CRYP_DMA_TX_FIFO, - .dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES, - .dst_maxburst = 4, - }; - struct dma_slave_config cryp2mem = { - .direction = DMA_DEV_TO_MEM, - .src_addr = device_data->phybase + CRYP_DMA_RX_FIFO, - .src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES, - .src_maxburst = 4, - }; - - dma_cap_zero(device_data->dma.mask); - dma_cap_set(DMA_SLAVE, device_data->dma.mask); - - device_data->dma.cfg_mem2cryp = mem_to_engine; - device_data->dma.chan_mem2cryp = - dma_request_channel(device_data->dma.mask, - stedma40_filter, - device_data->dma.cfg_mem2cryp); - - device_data->dma.cfg_cryp2mem = engine_to_mem; - device_data->dma.chan_cryp2mem = - dma_request_channel(device_data->dma.mask, - stedma40_filter, - device_data->dma.cfg_cryp2mem); - - dmaengine_slave_config(device_data->dma.chan_mem2cryp, &mem2cryp); - dmaengine_slave_config(device_data->dma.chan_cryp2mem, &cryp2mem); - - init_completion(&device_data->dma.cryp_dma_complete); -} - -static void cryp_dma_out_callback(void *data) -{ - struct cryp_ctx *ctx = (struct cryp_ctx *) data; - dev_dbg(ctx->device->dev, "[%s]: ", __func__); - - complete(&ctx->device->dma.cryp_dma_complete); -} - -static int cryp_set_dma_transfer(struct cryp_ctx *ctx, - struct scatterlist *sg, - int len, - enum dma_data_direction direction) -{ - struct dma_async_tx_descriptor *desc; - struct dma_chan *channel = NULL; - dma_cookie_t cookie; - - dev_dbg(ctx->device->dev, "[%s]: ", __func__); - - if (unlikely(!IS_ALIGNED((unsigned long)sg, 4))) { - dev_err(ctx->device->dev, "[%s]: Data in sg list isn't " - "aligned! Addr: 0x%08lx", __func__, (unsigned long)sg); - return -EFAULT; - } - - switch (direction) { - case DMA_TO_DEVICE: - channel = ctx->device->dma.chan_mem2cryp; - ctx->device->dma.sg_src = sg; - ctx->device->dma.sg_src_len = dma_map_sg(channel->device->dev, - ctx->device->dma.sg_src, - ctx->device->dma.nents_src, - direction); - - if (!ctx->device->dma.sg_src_len) { - dev_dbg(ctx->device->dev, - "[%s]: Could not map the sg list (TO_DEVICE)", - __func__); - return -EFAULT; - } - - dev_dbg(ctx->device->dev, "[%s]: Setting up DMA for buffer " - "(TO_DEVICE)", __func__); - - desc = dmaengine_prep_slave_sg(channel, - ctx->device->dma.sg_src, - ctx->device->dma.sg_src_len, - DMA_MEM_TO_DEV, DMA_CTRL_ACK); - break; - - case DMA_FROM_DEVICE: - channel = ctx->device->dma.chan_cryp2mem; - ctx->device->dma.sg_dst = sg; - ctx->device->dma.sg_dst_len = dma_map_sg(channel->device->dev, - ctx->device->dma.sg_dst, - ctx->device->dma.nents_dst, - direction); - - if (!ctx->device->dma.sg_dst_len) { - dev_dbg(ctx->device->dev, - "[%s]: Could not map the sg list (FROM_DEVICE)", - __func__); - return -EFAULT; - } - - dev_dbg(ctx->device->dev, "[%s]: Setting up DMA for buffer " - "(FROM_DEVICE)", __func__); - - desc = dmaengine_prep_slave_sg(channel, - ctx->device->dma.sg_dst, - ctx->device->dma.sg_dst_len, - DMA_DEV_TO_MEM, - DMA_CTRL_ACK | - DMA_PREP_INTERRUPT); - - desc->callback = cryp_dma_out_callback; - desc->callback_param = ctx; - break; - - default: - dev_dbg(ctx->device->dev, "[%s]: Invalid DMA direction", - __func__); - return -EFAULT; - } - - cookie = dmaengine_submit(desc); - if (dma_submit_error(cookie)) { - dev_dbg(ctx->device->dev, "[%s]: DMA submission failed\n", - __func__); - return cookie; - } - - dma_async_issue_pending(channel); - - return 0; -} - -static void cryp_dma_done(struct cryp_ctx *ctx) -{ - struct dma_chan *chan; - - dev_dbg(ctx->device->dev, "[%s]: ", __func__); - - chan = ctx->device->dma.chan_mem2cryp; - dmaengine_terminate_all(chan); - dma_unmap_sg(chan->device->dev, ctx->device->dma.sg_src, - ctx->device->dma.nents_src, DMA_TO_DEVICE); - - chan = ctx->device->dma.chan_cryp2mem; - dmaengine_terminate_all(chan); - dma_unmap_sg(chan->device->dev, ctx->device->dma.sg_dst, - ctx->device->dma.nents_dst, DMA_FROM_DEVICE); -} - -static int cryp_dma_write(struct cryp_ctx *ctx, struct scatterlist *sg, - int len) -{ - int error = cryp_set_dma_transfer(ctx, sg, len, DMA_TO_DEVICE); - dev_dbg(ctx->device->dev, "[%s]: ", __func__); - - if (error) { - dev_dbg(ctx->device->dev, "[%s]: cryp_set_dma_transfer() " - "failed", __func__); - return error; - } - - return len; -} - -static int cryp_dma_read(struct cryp_ctx *ctx, struct scatterlist *sg, int len) -{ - int error = cryp_set_dma_transfer(ctx, sg, len, DMA_FROM_DEVICE); - if (error) { - dev_dbg(ctx->device->dev, "[%s]: cryp_set_dma_transfer() " - "failed", __func__); - return error; - } - - return len; -} - -static void cryp_polling_mode(struct cryp_ctx *ctx, - struct cryp_device_data *device_data) -{ - int len = ctx->blocksize / BYTES_PER_WORD; - int remaining_length = ctx->datalen; - u32 *indata = (u32 *)ctx->indata; - u32 *outdata = (u32 *)ctx->outdata; - - while (remaining_length > 0) { - writesl(&device_data->base->din, indata, len); - indata += len; - remaining_length -= (len * BYTES_PER_WORD); - cryp_wait_until_done(device_data); - - readsl(&device_data->base->dout, outdata, len); - outdata += len; - cryp_wait_until_done(device_data); - } -} - -static int cryp_disable_power(struct device *dev, - struct cryp_device_data *device_data, - bool save_device_context) -{ - int ret = 0; - - dev_dbg(dev, "[%s]", __func__); - - spin_lock(&device_data->power_state_spinlock); - if (!device_data->power_state) - goto out; - - spin_lock(&device_data->ctx_lock); - if (save_device_context && device_data->current_ctx) { - cryp_save_device_context(device_data, - &device_data->current_ctx->dev_ctx, - cryp_mode); - device_data->restore_dev_ctx = true; - } - spin_unlock(&device_data->ctx_lock); - - clk_disable(device_data->clk); - ret = regulator_disable(device_data->pwr_regulator); - if (ret) - dev_err(dev, "[%s]: " - "regulator_disable() failed!", - __func__); - - device_data->power_state = false; - -out: - spin_unlock(&device_data->power_state_spinlock); - - return ret; -} - -static int cryp_enable_power( - struct device *dev, - struct cryp_device_data *device_data, - bool restore_device_context) -{ - int ret = 0; - - dev_dbg(dev, "[%s]", __func__); - - spin_lock(&device_data->power_state_spinlock); - if (!device_data->power_state) { - ret = regulator_enable(device_data->pwr_regulator); - if (ret) { - dev_err(dev, "[%s]: regulator_enable() failed!", - __func__); - goto out; - } - - ret = clk_enable(device_data->clk); - if (ret) { - dev_err(dev, "[%s]: clk_enable() failed!", - __func__); - regulator_disable(device_data->pwr_regulator); - goto out; - } - device_data->power_state = true; - } - - if (device_data->restore_dev_ctx) { - spin_lock(&device_data->ctx_lock); - if (restore_device_context && device_data->current_ctx) { - device_data->restore_dev_ctx = false; - cryp_restore_device_context(device_data, - &device_data->current_ctx->dev_ctx); - } - spin_unlock(&device_data->ctx_lock); - } -out: - spin_unlock(&device_data->power_state_spinlock); - - return ret; -} - -static int hw_crypt_noxts(struct cryp_ctx *ctx, - struct cryp_device_data *device_data) -{ - int ret = 0; - - const u8 *indata = ctx->indata; - u8 *outdata = ctx->outdata; - u32 datalen = ctx->datalen; - u32 outlen = datalen; - - pr_debug(DEV_DBG_NAME " [%s]", __func__); - - ctx->outlen = ctx->datalen; - - if (unlikely(!IS_ALIGNED((unsigned long)indata, 4))) { - pr_debug(DEV_DBG_NAME " [%s]: Data isn't aligned! Addr: " - "0x%08lx", __func__, (unsigned long)indata); - return -EINVAL; - } - - ret = cryp_setup_context(ctx, device_data); - - if (ret) - goto out; - - if (cryp_mode == CRYP_MODE_INTERRUPT) { - cryp_enable_irq_src(device_data, CRYP_IRQ_SRC_INPUT_FIFO | - CRYP_IRQ_SRC_OUTPUT_FIFO); - - /* - * ctx->outlen is decremented in the cryp_interrupt_handler - * function. We had to add cpu_relax() (barrier) to make sure - * that gcc didn't optimze away this variable. - */ - while (ctx->outlen > 0) - cpu_relax(); - } else if (cryp_mode == CRYP_MODE_POLLING || - cryp_mode == CRYP_MODE_DMA) { - /* - * The reason for having DMA in this if case is that if we are - * running cryp_mode = 2, then we separate DMA routines for - * handling cipher/plaintext > blocksize, except when - * running the normal CRYPTO_ALG_TYPE_CIPHER, then we still use - * the polling mode. Overhead of doing DMA setup eats up the - * benefits using it. - */ - cryp_polling_mode(ctx, device_data); - } else { - dev_err(ctx->device->dev, "[%s]: Invalid operation mode!", - __func__); - ret = -EPERM; - goto out; - } - - cryp_save_device_context(device_data, &ctx->dev_ctx, cryp_mode); - ctx->updated = 1; - -out: - ctx->indata = indata; - ctx->outdata = outdata; - ctx->datalen = datalen; - ctx->outlen = outlen; - - return ret; -} - -static int get_nents(struct scatterlist *sg, int nbytes) -{ - int nents = 0; - - while (nbytes > 0) { - nbytes -= sg->length; - sg = sg_next(sg); - nents++; - } - - return nents; -} - -static int ablk_dma_crypt(struct skcipher_request *areq) -{ - struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(areq); - struct cryp_ctx *ctx = crypto_skcipher_ctx(cipher); - struct cryp_device_data *device_data; - - int bytes_written = 0; - int bytes_read = 0; - int ret; - - pr_debug(DEV_DBG_NAME " [%s]", __func__); - - ctx->datalen = areq->cryptlen; - ctx->outlen = areq->cryptlen; - - ret = cryp_get_device_data(ctx, &device_data); - if (ret) - return ret; - - ret = cryp_setup_context(ctx, device_data); - if (ret) - goto out; - - /* We have the device now, so store the nents in the dma struct. */ - ctx->device->dma.nents_src = get_nents(areq->src, ctx->datalen); - ctx->device->dma.nents_dst = get_nents(areq->dst, ctx->outlen); - - /* Enable DMA in- and output. */ - cryp_configure_for_dma(device_data, CRYP_DMA_ENABLE_BOTH_DIRECTIONS); - - bytes_written = cryp_dma_write(ctx, areq->src, ctx->datalen); - bytes_read = cryp_dma_read(ctx, areq->dst, bytes_written); - - wait_for_completion(&ctx->device->dma.cryp_dma_complete); - cryp_dma_done(ctx); - - cryp_save_device_context(device_data, &ctx->dev_ctx, cryp_mode); - ctx->updated = 1; - -out: - spin_lock(&device_data->ctx_lock); - device_data->current_ctx = NULL; - ctx->device = NULL; - spin_unlock(&device_data->ctx_lock); - - /* - * The down_interruptible part for this semaphore is called in - * cryp_get_device_data. - */ - up(&driver_data.device_allocation); - - if (unlikely(bytes_written != bytes_read)) - return -EPERM; - - return 0; -} - -static int ablk_crypt(struct skcipher_request *areq) -{ - struct skcipher_walk walk; - struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(areq); - struct cryp_ctx *ctx = crypto_skcipher_ctx(cipher); - struct cryp_device_data *device_data; - unsigned long src_paddr; - unsigned long dst_paddr; - int ret; - int nbytes; - - pr_debug(DEV_DBG_NAME " [%s]", __func__); - - ret = cryp_get_device_data(ctx, &device_data); - if (ret) - goto out; - - ret = skcipher_walk_async(&walk, areq); - - if (ret) { - pr_err(DEV_DBG_NAME "[%s]: skcipher_walk_async() failed!", - __func__); - goto out; - } - - while ((nbytes = walk.nbytes) > 0) { - ctx->iv = walk.iv; - src_paddr = (page_to_phys(walk.src.phys.page) + walk.src.phys.offset); - ctx->indata = phys_to_virt(src_paddr); - - dst_paddr = (page_to_phys(walk.dst.phys.page) + walk.dst.phys.offset); - ctx->outdata = phys_to_virt(dst_paddr); - - ctx->datalen = nbytes - (nbytes % ctx->blocksize); - - ret = hw_crypt_noxts(ctx, device_data); - if (ret) - goto out; - - nbytes -= ctx->datalen; - ret = skcipher_walk_done(&walk, nbytes); - if (ret) - goto out; - } - -out: - /* Release the device */ - spin_lock(&device_data->ctx_lock); - device_data->current_ctx = NULL; - ctx->device = NULL; - spin_unlock(&device_data->ctx_lock); - - /* - * The down_interruptible part for this semaphore is called in - * cryp_get_device_data. - */ - up(&driver_data.device_allocation); - - return ret; -} - -static int aes_skcipher_setkey(struct crypto_skcipher *cipher, - const u8 *key, unsigned int keylen) -{ - struct cryp_ctx *ctx = crypto_skcipher_ctx(cipher); - - pr_debug(DEV_DBG_NAME " [%s]", __func__); - - switch (keylen) { - case AES_KEYSIZE_128: - ctx->config.keysize = CRYP_KEY_SIZE_128; - break; - - case AES_KEYSIZE_192: - ctx->config.keysize = CRYP_KEY_SIZE_192; - break; - - case AES_KEYSIZE_256: - ctx->config.keysize = CRYP_KEY_SIZE_256; - break; - - default: - pr_err(DEV_DBG_NAME "[%s]: Unknown keylen!", __func__); - return -EINVAL; - } - - memcpy(ctx->key, key, keylen); - ctx->keylen = keylen; - - ctx->updated = 0; - - return 0; -} - -static int des_skcipher_setkey(struct crypto_skcipher *cipher, - const u8 *key, unsigned int keylen) -{ - struct cryp_ctx *ctx = crypto_skcipher_ctx(cipher); - int err; - - pr_debug(DEV_DBG_NAME " [%s]", __func__); - - err = verify_skcipher_des_key(cipher, key); - if (err) - return err; - - memcpy(ctx->key, key, keylen); - ctx->keylen = keylen; - - ctx->updated = 0; - return 0; -} - -static int des3_skcipher_setkey(struct crypto_skcipher *cipher, - const u8 *key, unsigned int keylen) -{ - struct cryp_ctx *ctx = crypto_skcipher_ctx(cipher); - int err; - - pr_debug(DEV_DBG_NAME " [%s]", __func__); - - err = verify_skcipher_des3_key(cipher, key); - if (err) - return err; - - memcpy(ctx->key, key, keylen); - ctx->keylen = keylen; - - ctx->updated = 0; - return 0; -} - -static int cryp_blk_encrypt(struct skcipher_request *areq) -{ - struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(areq); - struct cryp_ctx *ctx = crypto_skcipher_ctx(cipher); - - pr_debug(DEV_DBG_NAME " [%s]", __func__); - - ctx->config.algodir = CRYP_ALGORITHM_ENCRYPT; - - /* - * DMA does not work for DES due to a hw bug */ - if (cryp_mode == CRYP_MODE_DMA && mode_is_aes(ctx->config.algomode)) - return ablk_dma_crypt(areq); - - /* For everything except DMA, we run the non DMA version. */ - return ablk_crypt(areq); -} - -static int cryp_blk_decrypt(struct skcipher_request *areq) -{ - struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(areq); - struct cryp_ctx *ctx = crypto_skcipher_ctx(cipher); - - pr_debug(DEV_DBG_NAME " [%s]", __func__); - - ctx->config.algodir = CRYP_ALGORITHM_DECRYPT; - - /* DMA does not work for DES due to a hw bug */ - if (cryp_mode == CRYP_MODE_DMA && mode_is_aes(ctx->config.algomode)) - return ablk_dma_crypt(areq); - - /* For everything except DMA, we run the non DMA version. */ - return ablk_crypt(areq); -} - -struct cryp_algo_template { - enum cryp_algo_mode algomode; - struct skcipher_alg skcipher; -}; - -static int cryp_init_tfm(struct crypto_skcipher *tfm) -{ - struct cryp_ctx *ctx = crypto_skcipher_ctx(tfm); - struct skcipher_alg *alg = crypto_skcipher_alg(tfm); - struct cryp_algo_template *cryp_alg = container_of(alg, - struct cryp_algo_template, - skcipher); - - ctx->config.algomode = cryp_alg->algomode; - ctx->blocksize = crypto_skcipher_blocksize(tfm); - - return 0; -} - -static struct cryp_algo_template cryp_algs[] = { - { - .algomode = CRYP_ALGO_AES_ECB, - .skcipher = { - .base.cra_name = "ecb(aes)", - .base.cra_driver_name = "ecb-aes-ux500", - .base.cra_priority = 300, - .base.cra_flags = CRYPTO_ALG_ASYNC, - .base.cra_blocksize = AES_BLOCK_SIZE, - .base.cra_ctxsize = sizeof(struct cryp_ctx), - .base.cra_alignmask = 3, - .base.cra_module = THIS_MODULE, - - .min_keysize = AES_MIN_KEY_SIZE, - .max_keysize = AES_MAX_KEY_SIZE, - .setkey = aes_skcipher_setkey, - .encrypt = cryp_blk_encrypt, - .decrypt = cryp_blk_decrypt, - .init = cryp_init_tfm, - } - }, - { - .algomode = CRYP_ALGO_AES_CBC, - .skcipher = { - .base.cra_name = "cbc(aes)", - .base.cra_driver_name = "cbc-aes-ux500", - .base.cra_priority = 300, - .base.cra_flags = CRYPTO_ALG_ASYNC, - .base.cra_blocksize = AES_BLOCK_SIZE, - .base.cra_ctxsize = sizeof(struct cryp_ctx), - .base.cra_alignmask = 3, - .base.cra_module = THIS_MODULE, - - .min_keysize = AES_MIN_KEY_SIZE, - .max_keysize = AES_MAX_KEY_SIZE, - .setkey = aes_skcipher_setkey, - .encrypt = cryp_blk_encrypt, - .decrypt = cryp_blk_decrypt, - .init = cryp_init_tfm, - .ivsize = AES_BLOCK_SIZE, - } - }, - { - .algomode = CRYP_ALGO_AES_CTR, - .skcipher = { - .base.cra_name = "ctr(aes)", - .base.cra_driver_name = "ctr-aes-ux500", - .base.cra_priority = 300, - .base.cra_flags = CRYPTO_ALG_ASYNC, - .base.cra_blocksize = 1, - .base.cra_ctxsize = sizeof(struct cryp_ctx), - .base.cra_alignmask = 3, - .base.cra_module = THIS_MODULE, - - .min_keysize = AES_MIN_KEY_SIZE, - .max_keysize = AES_MAX_KEY_SIZE, - .setkey = aes_skcipher_setkey, - .encrypt = cryp_blk_encrypt, - .decrypt = cryp_blk_decrypt, - .init = cryp_init_tfm, - .ivsize = AES_BLOCK_SIZE, - .chunksize = AES_BLOCK_SIZE, - } - }, - { - .algomode = CRYP_ALGO_DES_ECB, - .skcipher = { - .base.cra_name = "ecb(des)", - .base.cra_driver_name = "ecb-des-ux500", - .base.cra_priority = 300, - .base.cra_flags = CRYPTO_ALG_ASYNC, - .base.cra_blocksize = DES_BLOCK_SIZE, - .base.cra_ctxsize = sizeof(struct cryp_ctx), - .base.cra_alignmask = 3, - .base.cra_module = THIS_MODULE, - - .min_keysize = DES_KEY_SIZE, - .max_keysize = DES_KEY_SIZE, - .setkey = des_skcipher_setkey, - .encrypt = cryp_blk_encrypt, - .decrypt = cryp_blk_decrypt, - .init = cryp_init_tfm, - } - }, - { - .algomode = CRYP_ALGO_TDES_ECB, - .skcipher = { - .base.cra_name = "ecb(des3_ede)", - .base.cra_driver_name = "ecb-des3_ede-ux500", - .base.cra_priority = 300, - .base.cra_flags = CRYPTO_ALG_ASYNC, - .base.cra_blocksize = DES3_EDE_BLOCK_SIZE, - .base.cra_ctxsize = sizeof(struct cryp_ctx), - .base.cra_alignmask = 3, - .base.cra_module = THIS_MODULE, - - .min_keysize = DES3_EDE_KEY_SIZE, - .max_keysize = DES3_EDE_KEY_SIZE, - .setkey = des3_skcipher_setkey, - .encrypt = cryp_blk_encrypt, - .decrypt = cryp_blk_decrypt, - .init = cryp_init_tfm, - } - }, - { - .algomode = CRYP_ALGO_DES_CBC, - .skcipher = { - .base.cra_name = "cbc(des)", - .base.cra_driver_name = "cbc-des-ux500", - .base.cra_priority = 300, - .base.cra_flags = CRYPTO_ALG_ASYNC, - .base.cra_blocksize = DES_BLOCK_SIZE, - .base.cra_ctxsize = sizeof(struct cryp_ctx), - .base.cra_alignmask = 3, - .base.cra_module = THIS_MODULE, - - .min_keysize = DES_KEY_SIZE, - .max_keysize = DES_KEY_SIZE, - .setkey = des_skcipher_setkey, - .encrypt = cryp_blk_encrypt, - .decrypt = cryp_blk_decrypt, - .ivsize = DES_BLOCK_SIZE, - .init = cryp_init_tfm, - } - }, - { - .algomode = CRYP_ALGO_TDES_CBC, - .skcipher = { - .base.cra_name = "cbc(des3_ede)", - .base.cra_driver_name = "cbc-des3_ede-ux500", - .base.cra_priority = 300, - .base.cra_flags = CRYPTO_ALG_ASYNC, - .base.cra_blocksize = DES3_EDE_BLOCK_SIZE, - .base.cra_ctxsize = sizeof(struct cryp_ctx), - .base.cra_alignmask = 3, - .base.cra_module = THIS_MODULE, - - .min_keysize = DES3_EDE_KEY_SIZE, - .max_keysize = DES3_EDE_KEY_SIZE, - .setkey = des3_skcipher_setkey, - .encrypt = cryp_blk_encrypt, - .decrypt = cryp_blk_decrypt, - .ivsize = DES3_EDE_BLOCK_SIZE, - .init = cryp_init_tfm, - } - } -}; - -/** - * cryp_algs_register_all - - */ -static int cryp_algs_register_all(void) -{ - int ret; - int i; - int count; - - pr_debug("[%s]", __func__); - - for (i = 0; i < ARRAY_SIZE(cryp_algs); i++) { - ret = crypto_register_skcipher(&cryp_algs[i].skcipher); - if (ret) { - count = i; - pr_err("[%s] alg registration failed", - cryp_algs[i].skcipher.base.cra_driver_name); - goto unreg; - } - } - return 0; -unreg: - for (i = 0; i < count; i++) - crypto_unregister_skcipher(&cryp_algs[i].skcipher); - return ret; -} - -/** - * cryp_algs_unregister_all - - */ -static void cryp_algs_unregister_all(void) -{ - int i; - - pr_debug(DEV_DBG_NAME " [%s]", __func__); - - for (i = 0; i < ARRAY_SIZE(cryp_algs); i++) - crypto_unregister_skcipher(&cryp_algs[i].skcipher); -} - -static int ux500_cryp_probe(struct platform_device *pdev) -{ - int ret; - struct resource *res; - struct cryp_device_data *device_data; - struct cryp_protection_config prot = { - .privilege_access = CRYP_STATE_ENABLE - }; - struct device *dev = &pdev->dev; - - dev_dbg(dev, "[%s]", __func__); - device_data = devm_kzalloc(dev, sizeof(*device_data), GFP_KERNEL); - if (!device_data) { - ret = -ENOMEM; - goto out; - } - - device_data->dev = dev; - device_data->current_ctx = NULL; - - /* Grab the DMA configuration from platform data. */ - mem_to_engine = &((struct cryp_platform_data *) - dev->platform_data)->mem_to_engine; - engine_to_mem = &((struct cryp_platform_data *) - dev->platform_data)->engine_to_mem; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_err(dev, "[%s]: platform_get_resource() failed", - __func__); - ret = -ENODEV; - goto out; - } - - device_data->phybase = res->start; - device_data->base = devm_ioremap_resource(dev, res); - if (IS_ERR(device_data->base)) { - ret = PTR_ERR(device_data->base); - goto out; - } - - spin_lock_init(&device_data->ctx_lock); - spin_lock_init(&device_data->power_state_spinlock); - - /* Enable power for CRYP hardware block */ - device_data->pwr_regulator = regulator_get(&pdev->dev, "v-ape"); - if (IS_ERR(device_data->pwr_regulator)) { - dev_err(dev, "[%s]: could not get cryp regulator", __func__); - ret = PTR_ERR(device_data->pwr_regulator); - device_data->pwr_regulator = NULL; - goto out; - } - - /* Enable the clk for CRYP hardware block */ - device_data->clk = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(device_data->clk)) { - dev_err(dev, "[%s]: clk_get() failed!", __func__); - ret = PTR_ERR(device_data->clk); - goto out_regulator; - } - - ret = clk_prepare(device_data->clk); - if (ret) { - dev_err(dev, "[%s]: clk_prepare() failed!", __func__); - goto out_regulator; - } - - /* Enable device power (and clock) */ - ret = cryp_enable_power(device_data->dev, device_data, false); - if (ret) { - dev_err(dev, "[%s]: cryp_enable_power() failed!", __func__); - goto out_clk_unprepare; - } - - if (cryp_check(device_data)) { - dev_err(dev, "[%s]: cryp_check() failed!", __func__); - ret = -EINVAL; - goto out_power; - } - - if (cryp_configure_protection(device_data, &prot)) { - dev_err(dev, "[%s]: cryp_configure_protection() failed!", - __func__); - ret = -EINVAL; - goto out_power; - } - - device_data->irq = platform_get_irq(pdev, 0); - if (device_data->irq <= 0) { - ret = device_data->irq ? device_data->irq : -ENXIO; - goto out_power; - } - - ret = devm_request_irq(&pdev->dev, device_data->irq, - cryp_interrupt_handler, 0, "cryp1", device_data); - if (ret) { - dev_err(dev, "[%s]: Unable to request IRQ", __func__); - goto out_power; - } - - if (cryp_mode == CRYP_MODE_DMA) - cryp_dma_setup_channel(device_data, dev); - - platform_set_drvdata(pdev, device_data); - - /* Put the new device into the device list... */ - klist_add_tail(&device_data->list_node, &driver_data.device_list); - - /* ... and signal that a new device is available. */ - up(&driver_data.device_allocation); - - atomic_set(&session_id, 1); - - ret = cryp_algs_register_all(); - if (ret) { - dev_err(dev, "[%s]: cryp_algs_register_all() failed!", - __func__); - goto out_power; - } - - dev_info(dev, "successfully registered\n"); - - return 0; - -out_power: - cryp_disable_power(device_data->dev, device_data, false); - -out_clk_unprepare: - clk_unprepare(device_data->clk); - -out_regulator: - regulator_put(device_data->pwr_regulator); - -out: - return ret; -} - -static int ux500_cryp_remove(struct platform_device *pdev) -{ - struct cryp_device_data *device_data; - - dev_dbg(&pdev->dev, "[%s]", __func__); - device_data = platform_get_drvdata(pdev); - if (!device_data) { - dev_err(&pdev->dev, "[%s]: platform_get_drvdata() failed!", - __func__); - return -ENOMEM; - } - - /* Try to decrease the number of available devices. */ - if (down_trylock(&driver_data.device_allocation)) - return -EBUSY; - - /* Check that the device is free */ - spin_lock(&device_data->ctx_lock); - /* current_ctx allocates a device, NULL = unallocated */ - if (device_data->current_ctx) { - /* The device is busy */ - spin_unlock(&device_data->ctx_lock); - /* Return the device to the pool. */ - up(&driver_data.device_allocation); - return -EBUSY; - } - - spin_unlock(&device_data->ctx_lock); - - /* Remove the device from the list */ - if (klist_node_attached(&device_data->list_node)) - klist_remove(&device_data->list_node); - - /* If this was the last device, remove the services */ - if (list_empty(&driver_data.device_list.k_list)) - cryp_algs_unregister_all(); - - if (cryp_disable_power(&pdev->dev, device_data, false)) - dev_err(&pdev->dev, "[%s]: cryp_disable_power() failed", - __func__); - - clk_unprepare(device_data->clk); - regulator_put(device_data->pwr_regulator); - - return 0; -} - -static void ux500_cryp_shutdown(struct platform_device *pdev) -{ - struct cryp_device_data *device_data; - - dev_dbg(&pdev->dev, "[%s]", __func__); - - device_data = platform_get_drvdata(pdev); - if (!device_data) { - dev_err(&pdev->dev, "[%s]: platform_get_drvdata() failed!", - __func__); - return; - } - - /* Check that the device is free */ - spin_lock(&device_data->ctx_lock); - /* current_ctx allocates a device, NULL = unallocated */ - if (!device_data->current_ctx) { - if (down_trylock(&driver_data.device_allocation)) - dev_dbg(&pdev->dev, "[%s]: Cryp still in use!" - "Shutting down anyway...", __func__); - /** - * (Allocate the device) - * Need to set this to non-null (dummy) value, - * to avoid usage if context switching. - */ - device_data->current_ctx++; - } - spin_unlock(&device_data->ctx_lock); - - /* Remove the device from the list */ - if (klist_node_attached(&device_data->list_node)) - klist_remove(&device_data->list_node); - - /* If this was the last device, remove the services */ - if (list_empty(&driver_data.device_list.k_list)) - cryp_algs_unregister_all(); - - if (cryp_disable_power(&pdev->dev, device_data, false)) - dev_err(&pdev->dev, "[%s]: cryp_disable_power() failed", - __func__); - -} - -#ifdef CONFIG_PM_SLEEP -static int ux500_cryp_suspend(struct device *dev) -{ - int ret; - struct platform_device *pdev = to_platform_device(dev); - struct cryp_device_data *device_data; - struct cryp_ctx *temp_ctx = NULL; - - dev_dbg(dev, "[%s]", __func__); - - /* Handle state? */ - device_data = platform_get_drvdata(pdev); - if (!device_data) { - dev_err(dev, "[%s]: platform_get_drvdata() failed!", __func__); - return -ENOMEM; - } - - disable_irq(device_data->irq); - - spin_lock(&device_data->ctx_lock); - if (!device_data->current_ctx) - device_data->current_ctx++; - spin_unlock(&device_data->ctx_lock); - - if (device_data->current_ctx == ++temp_ctx) { - if (down_interruptible(&driver_data.device_allocation)) - dev_dbg(dev, "[%s]: down_interruptible() failed", - __func__); - ret = cryp_disable_power(dev, device_data, false); - - } else - ret = cryp_disable_power(dev, device_data, true); - - if (ret) - dev_err(dev, "[%s]: cryp_disable_power()", __func__); - - return ret; -} - -static int ux500_cryp_resume(struct device *dev) -{ - int ret = 0; - struct platform_device *pdev = to_platform_device(dev); - struct cryp_device_data *device_data; - struct cryp_ctx *temp_ctx = NULL; - - dev_dbg(dev, "[%s]", __func__); - - device_data = platform_get_drvdata(pdev); - if (!device_data) { - dev_err(dev, "[%s]: platform_get_drvdata() failed!", __func__); - return -ENOMEM; - } - - spin_lock(&device_data->ctx_lock); - if (device_data->current_ctx == ++temp_ctx) - device_data->current_ctx = NULL; - spin_unlock(&device_data->ctx_lock); - - - if (!device_data->current_ctx) - up(&driver_data.device_allocation); - else - ret = cryp_enable_power(dev, device_data, true); - - if (ret) - dev_err(dev, "[%s]: cryp_enable_power() failed!", __func__); - else - enable_irq(device_data->irq); - - return ret; -} -#endif - -static SIMPLE_DEV_PM_OPS(ux500_cryp_pm, ux500_cryp_suspend, ux500_cryp_resume); - -static const struct of_device_id ux500_cryp_match[] = { - { .compatible = "stericsson,ux500-cryp" }, - { }, -}; -MODULE_DEVICE_TABLE(of, ux500_cryp_match); - -static struct platform_driver cryp_driver = { - .probe = ux500_cryp_probe, - .remove = ux500_cryp_remove, - .shutdown = ux500_cryp_shutdown, - .driver = { - .name = "cryp1", - .of_match_table = ux500_cryp_match, - .pm = &ux500_cryp_pm, - } -}; - -static int __init ux500_cryp_mod_init(void) -{ - pr_debug("[%s] is called!", __func__); - klist_init(&driver_data.device_list, NULL, NULL); - /* Initialize the semaphore to 0 devices (locked state) */ - sema_init(&driver_data.device_allocation, 0); - return platform_driver_register(&cryp_driver); -} - -static void __exit ux500_cryp_mod_fini(void) -{ - pr_debug("[%s] is called!", __func__); - platform_driver_unregister(&cryp_driver); -} - -module_init(ux500_cryp_mod_init); -module_exit(ux500_cryp_mod_fini); - -module_param(cryp_mode, int, 0); - -MODULE_DESCRIPTION("Driver for ST-Ericsson UX500 CRYP crypto engine."); -MODULE_ALIAS_CRYPTO("aes-all"); -MODULE_ALIAS_CRYPTO("des-all"); - -MODULE_LICENSE("GPL"); |