drivers/crypto/rockchip/rk3288_crypto.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Crypto acceleration support for Rockchip RK3288
  *
  * Copyright (c) 2015, Fuzhou Rockchip Electronics Co., Ltd
  *
  * Author: Zain Wang <zain.wang@rock-chips.com>
  *
  * Some ideas are from marvell-cesa.c and s5p-sss.c driver.
  */

 #include "rk3288_crypto.h"
 #include <crypto/engine.h>
 #include <crypto/internal/hash.h>
 #include <crypto/internal/skcipher.h>
 #include <linux/clk.h>
 #include <linux/dma-mapping.h>
 #include <linux/debugfs.h>
 #include <linux/delay.h>
 #include <linux/err.h>
 #include <linux/kernel.h>
 #include <linux/io.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/of.h>
 #include <linux/reset.h>
 #include <linux/spinlock.h>

 static struct rockchip_ip rocklist = {
 	.dev_list = LIST_HEAD_INIT(rocklist.dev_list),
 	.lock = __SPIN_LOCK_UNLOCKED(rocklist.lock),
 };

 struct rk_crypto_info *get_rk_crypto(void)
 {
 	struct rk_crypto_info *first;

 	spin_lock(&rocklist.lock);
 	first = list_first_entry_or_null(&rocklist.dev_list,
 					 struct rk_crypto_info, list);
 	list_rotate_left(&rocklist.dev_list);
 	spin_unlock(&rocklist.lock);
 	return first;
 }

 static const struct rk_variant rk3288_variant = {
 	.num_clks = 4,
 	.rkclks = {
 		{ "sclk", 150000000},
 	}
 };

 static const struct rk_variant rk3328_variant = {
 	.num_clks = 3,
 };

 static const struct rk_variant rk3399_variant = {
 	.num_clks = 3,
 };

 static int rk_crypto_get_clks(struct rk_crypto_info *dev)
 {
 	int i, j, err;
 	unsigned long cr;

 	dev->num_clks = devm_clk_bulk_get_all(dev->dev, &dev->clks);
 	if (dev->num_clks < dev->variant->num_clks) {
 		dev_err(dev->dev, "Missing clocks, got %d instead of %d\n",
 			dev->num_clks, dev->variant->num_clks);
 		return -EINVAL;
 	}

 	for (i = 0; i < dev->num_clks; i++) {
 		cr = clk_get_rate(dev->clks[i].clk);
 		for (j = 0; j < ARRAY_SIZE(dev->variant->rkclks); j++) {
 			if (dev->variant->rkclks[j].max == 0)
 				continue;
 			if (strcmp(dev->variant->rkclks[j].name, dev->clks[i].id))
 				continue;
 			if (cr > dev->variant->rkclks[j].max) {
 				err = clk_set_rate(dev->clks[i].clk,
 						   dev->variant->rkclks[j].max);
 				if (err)
 					dev_err(dev->dev, "Fail downclocking %s from %lu to %lu\n",
 						dev->variant->rkclks[j].name, cr,
 						dev->variant->rkclks[j].max);
 				else
 					dev_info(dev->dev, "Downclocking %s from %lu to %lu\n",
 						 dev->variant->rkclks[j].name, cr,
 						 dev->variant->rkclks[j].max);
 			}
 		}
 	}
 	return 0;
 }

 static int rk_crypto_enable_clk(struct rk_crypto_info *dev)
 {
 	int err;

 	err = clk_bulk_prepare_enable(dev->num_clks, dev->clks);
 	if (err)
 		dev_err(dev->dev, "Could not enable clock clks\n");

 	return err;
 }

 static void rk_crypto_disable_clk(struct rk_crypto_info *dev)
 {
 	clk_bulk_disable_unprepare(dev->num_clks, dev->clks);
 }

 /*
  * Power management strategy: The device is suspended until a request
  * is handled. For avoiding suspend/resume yoyo, the autosuspend is set to 2s.
  */
 static int rk_crypto_pm_suspend(struct device *dev)
 {
 	struct rk_crypto_info *rkdev = dev_get_drvdata(dev);

 	rk_crypto_disable_clk(rkdev);
 	reset_control_assert(rkdev->rst);

 	return 0;
 }

 static int rk_crypto_pm_resume(struct device *dev)
 {
 	struct rk_crypto_info *rkdev = dev_get_drvdata(dev);
 	int ret;

 	ret = rk_crypto_enable_clk(rkdev);
 	if (ret)
 		return ret;

 	reset_control_deassert(rkdev->rst);
 	return 0;

 }

 static const struct dev_pm_ops rk_crypto_pm_ops = {
 	SET_RUNTIME_PM_OPS(rk_crypto_pm_suspend, rk_crypto_pm_resume, NULL)
 };

 static int rk_crypto_pm_init(struct rk_crypto_info *rkdev)
 {
 	int err;

 	pm_runtime_use_autosuspend(rkdev->dev);
 	pm_runtime_set_autosuspend_delay(rkdev->dev, 2000);

 	err = pm_runtime_set_suspended(rkdev->dev);
 	if (err)
 		return err;
 	pm_runtime_enable(rkdev->dev);
 	return err;
 }

 static void rk_crypto_pm_exit(struct rk_crypto_info *rkdev)
 {
 	pm_runtime_disable(rkdev->dev);
 }

 static irqreturn_t rk_crypto_irq_handle(int irq, void *dev_id)
 {
 	struct rk_crypto_info *dev  = platform_get_drvdata(dev_id);
 	u32 interrupt_status;

 	interrupt_status = CRYPTO_READ(dev, RK_CRYPTO_INTSTS);
 	CRYPTO_WRITE(dev, RK_CRYPTO_INTSTS, interrupt_status);

 	dev->status = 1;
 	if (interrupt_status & 0x0a) {
 		dev_warn(dev->dev, "DMA Error\n");
 		dev->status = 0;
 	}
 	complete(&dev->complete);

 	return IRQ_HANDLED;
 }

 static struct rk_crypto_tmp *rk_cipher_algs[] = {
 	&rk_ecb_aes_alg,
 	&rk_cbc_aes_alg,
 	&rk_ecb_des_alg,
 	&rk_cbc_des_alg,
 	&rk_ecb_des3_ede_alg,
 	&rk_cbc_des3_ede_alg,
 	&rk_ahash_sha1,
 	&rk_ahash_sha256,
 	&rk_ahash_md5,
 };

 static int rk_crypto_debugfs_show(struct seq_file *seq, void *v)
 {
 	struct rk_crypto_info *dd;
 	unsigned int i;

 	spin_lock(&rocklist.lock);
 	list_for_each_entry(dd, &rocklist.dev_list, list) {
 		seq_printf(seq, "%s %s requests: %lu\n",
 			   dev_driver_string(dd->dev), dev_name(dd->dev),
 			   dd->nreq);
 	}
 	spin_unlock(&rocklist.lock);

 	for (i = 0; i < ARRAY_SIZE(rk_cipher_algs); i++) {
 		if (!rk_cipher_algs[i]->dev)
 			continue;
 		switch (rk_cipher_algs[i]->type) {
 		case CRYPTO_ALG_TYPE_SKCIPHER:
 			seq_printf(seq, "%s %s reqs=%lu fallback=%lu\n",
 				   rk_cipher_algs[i]->alg.skcipher.base.base.cra_driver_name,
 				   rk_cipher_algs[i]->alg.skcipher.base.base.cra_name,
 				   rk_cipher_algs[i]->stat_req, rk_cipher_algs[i]->stat_fb);
 			seq_printf(seq, "\tfallback due to length: %lu\n",
 				   rk_cipher_algs[i]->stat_fb_len);
 			seq_printf(seq, "\tfallback due to alignment: %lu\n",
 				   rk_cipher_algs[i]->stat_fb_align);
 			seq_printf(seq, "\tfallback due to SGs: %lu\n",
 				   rk_cipher_algs[i]->stat_fb_sgdiff);
 			break;
 		case CRYPTO_ALG_TYPE_AHASH:
 			seq_printf(seq, "%s %s reqs=%lu fallback=%lu\n",
 				   rk_cipher_algs[i]->alg.hash.base.halg.base.cra_driver_name,
 				   rk_cipher_algs[i]->alg.hash.base.halg.base.cra_name,
 				   rk_cipher_algs[i]->stat_req, rk_cipher_algs[i]->stat_fb);
 			break;
 		}
 	}
 	return 0;
 }

 DEFINE_SHOW_ATTRIBUTE(rk_crypto_debugfs);

 static void register_debugfs(struct rk_crypto_info *crypto_info)
 {
 	struct dentry *dbgfs_dir __maybe_unused;
 	struct dentry *dbgfs_stats __maybe_unused;

 	/* Ignore error of debugfs */
 	dbgfs_dir = debugfs_create_dir("rk3288_crypto", NULL);
 	dbgfs_stats = debugfs_create_file("stats", 0444, dbgfs_dir, &rocklist,
 					  &rk_crypto_debugfs_fops);

 #ifdef CONFIG_CRYPTO_DEV_ROCKCHIP_DEBUG
 	rocklist.dbgfs_dir = dbgfs_dir;
 	rocklist.dbgfs_stats = dbgfs_stats;
 #endif
 }

 static int rk_crypto_register(struct rk_crypto_info *crypto_info)
 {
 	unsigned int i, k;
 	int err = 0;

 	for (i = 0; i < ARRAY_SIZE(rk_cipher_algs); i++) {
 		rk_cipher_algs[i]->dev = crypto_info;
 		switch (rk_cipher_algs[i]->type) {
 		case CRYPTO_ALG_TYPE_SKCIPHER:
 			dev_info(crypto_info->dev, "Register %s as %s\n",
 				 rk_cipher_algs[i]->alg.skcipher.base.base.cra_name,
 				 rk_cipher_algs[i]->alg.skcipher.base.base.cra_driver_name);
 			err = crypto_engine_register_skcipher(&rk_cipher_algs[i]->alg.skcipher);
 			break;
 		case CRYPTO_ALG_TYPE_AHASH:
 			dev_info(crypto_info->dev, "Register %s as %s\n",
 				 rk_cipher_algs[i]->alg.hash.base.halg.base.cra_name,
 				 rk_cipher_algs[i]->alg.hash.base.halg.base.cra_driver_name);
 			err = crypto_engine_register_ahash(&rk_cipher_algs[i]->alg.hash);
 			break;
 		default:
 			dev_err(crypto_info->dev, "unknown algorithm\n");
 		}
 		if (err)
 			goto err_cipher_algs;
 	}
 	return 0;

 err_cipher_algs:
 	for (k = 0; k < i; k++) {
 		if (rk_cipher_algs[i]->type == CRYPTO_ALG_TYPE_SKCIPHER)
 			crypto_engine_unregister_skcipher(&rk_cipher_algs[k]->alg.skcipher);
 		else
 			crypto_engine_unregister_ahash(&rk_cipher_algs[i]->alg.hash);
 	}
 	return err;
 }

 static void rk_crypto_unregister(void)
 {
 	unsigned int i;

 	for (i = 0; i < ARRAY_SIZE(rk_cipher_algs); i++) {
 		if (rk_cipher_algs[i]->type == CRYPTO_ALG_TYPE_SKCIPHER)
 			crypto_engine_unregister_skcipher(&rk_cipher_algs[i]->alg.skcipher);
 		else
 			crypto_engine_unregister_ahash(&rk_cipher_algs[i]->alg.hash);
 	}
 }

 static const struct of_device_id crypto_of_id_table[] = {
 	{ .compatible = "rockchip,rk3288-crypto",
 	  .data = &rk3288_variant,
 	},
 	{ .compatible = "rockchip,rk3328-crypto",
 	  .data = &rk3328_variant,
 	},
 	{ .compatible = "rockchip,rk3399-crypto",
 	  .data = &rk3399_variant,
 	},
 	{}
 };
 MODULE_DEVICE_TABLE(of, crypto_of_id_table);

 static int rk_crypto_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct rk_crypto_info *crypto_info, *first;
 	int err = 0;

 	crypto_info = devm_kzalloc(&pdev->dev,
 				   sizeof(*crypto_info), GFP_KERNEL);
 	if (!crypto_info) {
 		err = -ENOMEM;
 		goto err_crypto;
 	}

 	crypto_info->dev = &pdev->dev;
 	platform_set_drvdata(pdev, crypto_info);

 	crypto_info->variant = of_device_get_match_data(&pdev->dev);
 	if (!crypto_info->variant) {
 		dev_err(&pdev->dev, "Missing variant\n");
 		return -EINVAL;
 	}

 	crypto_info->rst = devm_reset_control_array_get_exclusive(dev);
 	if (IS_ERR(crypto_info->rst)) {
 		err = PTR_ERR(crypto_info->rst);
 		goto err_crypto;
 	}

 	reset_control_assert(crypto_info->rst);
 	usleep_range(10, 20);
 	reset_control_deassert(crypto_info->rst);

 	crypto_info->reg = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(crypto_info->reg)) {
 		err = PTR_ERR(crypto_info->reg);
 		goto err_crypto;
 	}

 	err = rk_crypto_get_clks(crypto_info);
 	if (err)
 		goto err_crypto;

 	crypto_info->irq = platform_get_irq(pdev, 0);
 	if (crypto_info->irq < 0) {
 		err = crypto_info->irq;
 		goto err_crypto;
 	}

 	err = devm_request_irq(&pdev->dev, crypto_info->irq,
 			       rk_crypto_irq_handle, IRQF_SHARED,
 			       "rk-crypto", pdev);

 	if (err) {
 		dev_err(&pdev->dev, "irq request failed.\n");
 		goto err_crypto;
 	}

 	crypto_info->engine = crypto_engine_alloc_init(&pdev->dev, true);
 	if (!crypto_info->engine) {
 		err = -ENOMEM;
 		goto err_crypto;
 	}

 	crypto_engine_start(crypto_info->engine);
 	init_completion(&crypto_info->complete);

 	err = rk_crypto_pm_init(crypto_info);
 	if (err)
 		goto err_pm;

 	spin_lock(&rocklist.lock);
 	first = list_first_entry_or_null(&rocklist.dev_list,
 					 struct rk_crypto_info, list);
 	list_add_tail(&crypto_info->list, &rocklist.dev_list);
 	spin_unlock(&rocklist.lock);

 	if (!first) {
 		err = rk_crypto_register(crypto_info);
 		if (err) {
 			dev_err(dev, "Fail to register crypto algorithms");
 			goto err_register_alg;
 		}

 		register_debugfs(crypto_info);
 	}

 	return 0;

 err_register_alg:
 	rk_crypto_pm_exit(crypto_info);
 err_pm:
 	crypto_engine_exit(crypto_info->engine);
 err_crypto:
 	dev_err(dev, "Crypto Accelerator not successfully registered\n");
 	return err;
 }

 static void rk_crypto_remove(struct platform_device *pdev)
 {
 	struct rk_crypto_info *crypto_tmp = platform_get_drvdata(pdev);
 	struct rk_crypto_info *first;

 	spin_lock_bh(&rocklist.lock);
 	list_del(&crypto_tmp->list);
 	first = list_first_entry_or_null(&rocklist.dev_list,
 					 struct rk_crypto_info, list);
 	spin_unlock_bh(&rocklist.lock);

 	if (!first) {
 #ifdef CONFIG_CRYPTO_DEV_ROCKCHIP_DEBUG
 		debugfs_remove_recursive(rocklist.dbgfs_dir);
 #endif
 		rk_crypto_unregister();
 	}
 	rk_crypto_pm_exit(crypto_tmp);
 	crypto_engine_exit(crypto_tmp->engine);
 }

 static struct platform_driver crypto_driver = {
 	.probe		= rk_crypto_probe,
 	.remove_new	= rk_crypto_remove,
 	.driver		= {
 		.name	= "rk3288-crypto",
 		.pm		= &rk_crypto_pm_ops,
 		.of_match_table	= crypto_of_id_table,
 	},
 };

 module_platform_driver(crypto_driver);

 MODULE_AUTHOR("Zain Wang <zain.wang@rock-chips.com>");
 MODULE_DESCRIPTION("Support for Rockchip's cryptographic engine");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* Crypto acceleration support for Rockchip RK3288
	*
	* Copyright (c) 2015, Fuzhou Rockchip Electronics Co., Ltd
	*
	* Author: Zain Wang <zain.wang@rock-chips.com>
	*
	* Some ideas are from marvell-cesa.c and s5p-sss.c driver.
	*/

	#include "rk3288_crypto.h"
	#include <crypto/engine.h>
	#include <crypto/internal/hash.h>
	#include <crypto/internal/skcipher.h>
	#include <linux/clk.h>
	#include <linux/dma-mapping.h>
	#include <linux/debugfs.h>
	#include <linux/delay.h>
	#include <linux/err.h>
	#include <linux/kernel.h>
	#include <linux/io.h>
	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/of.h>
	#include <linux/reset.h>
	#include <linux/spinlock.h>

	static struct rockchip_ip rocklist = {
	.dev_list = LIST_HEAD_INIT(rocklist.dev_list),
	.lock = __SPIN_LOCK_UNLOCKED(rocklist.lock),
	};

	struct rk_crypto_info *get_rk_crypto(void)
	{
	struct rk_crypto_info *first;

	spin_lock(&rocklist.lock);
	first = list_first_entry_or_null(&rocklist.dev_list,
	struct rk_crypto_info, list);
	list_rotate_left(&rocklist.dev_list);
	spin_unlock(&rocklist.lock);
	return first;
	}

	static const struct rk_variant rk3288_variant = {
	.num_clks = 4,
	.rkclks = {
	{ "sclk", 150000000},
	}
	};

	static const struct rk_variant rk3328_variant = {
	.num_clks = 3,
	};

	static const struct rk_variant rk3399_variant = {
	.num_clks = 3,
	};

	static int rk_crypto_get_clks(struct rk_crypto_info *dev)
	{
	int i, j, err;
	unsigned long cr;

	dev->num_clks = devm_clk_bulk_get_all(dev->dev, &dev->clks);
	if (dev->num_clks < dev->variant->num_clks) {
	dev_err(dev->dev, "Missing clocks, got %d instead of %d\n",
	dev->num_clks, dev->variant->num_clks);
	return -EINVAL;
	}

	for (i = 0; i < dev->num_clks; i++) {
	cr = clk_get_rate(dev->clks[i].clk);
	for (j = 0; j < ARRAY_SIZE(dev->variant->rkclks); j++) {
	if (dev->variant->rkclks[j].max == 0)
	continue;
	if (strcmp(dev->variant->rkclks[j].name, dev->clks[i].id))
	continue;
	if (cr > dev->variant->rkclks[j].max) {
	err = clk_set_rate(dev->clks[i].clk,
	dev->variant->rkclks[j].max);
	if (err)
	dev_err(dev->dev, "Fail downclocking %s from %lu to %lu\n",
	dev->variant->rkclks[j].name, cr,
	dev->variant->rkclks[j].max);
	else
	dev_info(dev->dev, "Downclocking %s from %lu to %lu\n",
	dev->variant->rkclks[j].name, cr,
	dev->variant->rkclks[j].max);
	}
	}
	}
	return 0;
	}

	static int rk_crypto_enable_clk(struct rk_crypto_info *dev)
	{
	int err;

	err = clk_bulk_prepare_enable(dev->num_clks, dev->clks);
	if (err)
	dev_err(dev->dev, "Could not enable clock clks\n");

	return err;
	}

	static void rk_crypto_disable_clk(struct rk_crypto_info *dev)
	{
	clk_bulk_disable_unprepare(dev->num_clks, dev->clks);
	}

	/*
	* Power management strategy: The device is suspended until a request
	* is handled. For avoiding suspend/resume yoyo, the autosuspend is set to 2s.
	*/
	static int rk_crypto_pm_suspend(struct device *dev)
	{
	struct rk_crypto_info *rkdev = dev_get_drvdata(dev);

	rk_crypto_disable_clk(rkdev);
	reset_control_assert(rkdev->rst);

	return 0;
	}

	static int rk_crypto_pm_resume(struct device *dev)
	{
	struct rk_crypto_info *rkdev = dev_get_drvdata(dev);
	int ret;

	ret = rk_crypto_enable_clk(rkdev);
	if (ret)
	return ret;

	reset_control_deassert(rkdev->rst);
	return 0;

	}

	static const struct dev_pm_ops rk_crypto_pm_ops = {
	SET_RUNTIME_PM_OPS(rk_crypto_pm_suspend, rk_crypto_pm_resume, NULL)
	};

	static int rk_crypto_pm_init(struct rk_crypto_info *rkdev)
	{
	int err;

	pm_runtime_use_autosuspend(rkdev->dev);
	pm_runtime_set_autosuspend_delay(rkdev->dev, 2000);

	err = pm_runtime_set_suspended(rkdev->dev);
	if (err)
	return err;
	pm_runtime_enable(rkdev->dev);
	return err;
	}

	static void rk_crypto_pm_exit(struct rk_crypto_info *rkdev)
	{
	pm_runtime_disable(rkdev->dev);
	}

	static irqreturn_t rk_crypto_irq_handle(int irq, void *dev_id)
	{
	struct rk_crypto_info *dev = platform_get_drvdata(dev_id);
	u32 interrupt_status;

	interrupt_status = CRYPTO_READ(dev, RK_CRYPTO_INTSTS);
	CRYPTO_WRITE(dev, RK_CRYPTO_INTSTS, interrupt_status);

	dev->status = 1;
	if (interrupt_status & 0x0a) {
	dev_warn(dev->dev, "DMA Error\n");
	dev->status = 0;
	}
	complete(&dev->complete);

	return IRQ_HANDLED;
	}

	static struct rk_crypto_tmp *rk_cipher_algs[] = {
	&rk_ecb_aes_alg,
	&rk_cbc_aes_alg,
	&rk_ecb_des_alg,
	&rk_cbc_des_alg,
	&rk_ecb_des3_ede_alg,
	&rk_cbc_des3_ede_alg,
	&rk_ahash_sha1,
	&rk_ahash_sha256,
	&rk_ahash_md5,
	};

	static int rk_crypto_debugfs_show(struct seq_file seq, void v)
	{
	struct rk_crypto_info *dd;
	unsigned int i;

	spin_lock(&rocklist.lock);
	list_for_each_entry(dd, &rocklist.dev_list, list) {
	seq_printf(seq, "%s %s requests: %lu\n",
	dev_driver_string(dd->dev), dev_name(dd->dev),
	dd->nreq);
	}
	spin_unlock(&rocklist.lock);

	for (i = 0; i < ARRAY_SIZE(rk_cipher_algs); i++) {
	if (!rk_cipher_algs[i]->dev)
	continue;
	switch (rk_cipher_algs[i]->type) {
	case CRYPTO_ALG_TYPE_SKCIPHER:
	seq_printf(seq, "%s %s reqs=%lu fallback=%lu\n",
	rk_cipher_algs[i]->alg.skcipher.base.base.cra_driver_name,
	rk_cipher_algs[i]->alg.skcipher.base.base.cra_name,
	rk_cipher_algs[i]->stat_req, rk_cipher_algs[i]->stat_fb);
	seq_printf(seq, "\tfallback due to length: %lu\n",
	rk_cipher_algs[i]->stat_fb_len);
	seq_printf(seq, "\tfallback due to alignment: %lu\n",
	rk_cipher_algs[i]->stat_fb_align);
	seq_printf(seq, "\tfallback due to SGs: %lu\n",
	rk_cipher_algs[i]->stat_fb_sgdiff);
	break;
	case CRYPTO_ALG_TYPE_AHASH:
	seq_printf(seq, "%s %s reqs=%lu fallback=%lu\n",
	rk_cipher_algs[i]->alg.hash.base.halg.base.cra_driver_name,
	rk_cipher_algs[i]->alg.hash.base.halg.base.cra_name,
	rk_cipher_algs[i]->stat_req, rk_cipher_algs[i]->stat_fb);
	break;
	}
	}
	return 0;
	}

	DEFINE_SHOW_ATTRIBUTE(rk_crypto_debugfs);

	static void register_debugfs(struct rk_crypto_info *crypto_info)
	{
	struct dentry *dbgfs_dir __maybe_unused;
	struct dentry *dbgfs_stats __maybe_unused;

	/* Ignore error of debugfs */
	dbgfs_dir = debugfs_create_dir("rk3288_crypto", NULL);
	dbgfs_stats = debugfs_create_file("stats", 0444, dbgfs_dir, &rocklist,
	&rk_crypto_debugfs_fops);

	#ifdef CONFIG_CRYPTO_DEV_ROCKCHIP_DEBUG
	rocklist.dbgfs_dir = dbgfs_dir;
	rocklist.dbgfs_stats = dbgfs_stats;
	#endif
	}

	static int rk_crypto_register(struct rk_crypto_info *crypto_info)
	{
	unsigned int i, k;
	int err = 0;

	for (i = 0; i < ARRAY_SIZE(rk_cipher_algs); i++) {
	rk_cipher_algs[i]->dev = crypto_info;
	switch (rk_cipher_algs[i]->type) {
	case CRYPTO_ALG_TYPE_SKCIPHER:
	dev_info(crypto_info->dev, "Register %s as %s\n",
	rk_cipher_algs[i]->alg.skcipher.base.base.cra_name,
	rk_cipher_algs[i]->alg.skcipher.base.base.cra_driver_name);
	err = crypto_engine_register_skcipher(&rk_cipher_algs[i]->alg.skcipher);
	break;
	case CRYPTO_ALG_TYPE_AHASH:
	dev_info(crypto_info->dev, "Register %s as %s\n",
	rk_cipher_algs[i]->alg.hash.base.halg.base.cra_name,
	rk_cipher_algs[i]->alg.hash.base.halg.base.cra_driver_name);
	err = crypto_engine_register_ahash(&rk_cipher_algs[i]->alg.hash);
	break;
	default:
	dev_err(crypto_info->dev, "unknown algorithm\n");
	}
	if (err)
	goto err_cipher_algs;
	}
	return 0;

	err_cipher_algs:
	for (k = 0; k < i; k++) {
	if (rk_cipher_algs[i]->type == CRYPTO_ALG_TYPE_SKCIPHER)
	crypto_engine_unregister_skcipher(&rk_cipher_algs[k]->alg.skcipher);
	else
	crypto_engine_unregister_ahash(&rk_cipher_algs[i]->alg.hash);
	}
	return err;
	}

	static void rk_crypto_unregister(void)
	{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(rk_cipher_algs); i++) {
	if (rk_cipher_algs[i]->type == CRYPTO_ALG_TYPE_SKCIPHER)
	crypto_engine_unregister_skcipher(&rk_cipher_algs[i]->alg.skcipher);
	else
	crypto_engine_unregister_ahash(&rk_cipher_algs[i]->alg.hash);
	}
	}

	static const struct of_device_id crypto_of_id_table[] = {
	{ .compatible = "rockchip,rk3288-crypto",
	.data = &rk3288_variant,
	},
	{ .compatible = "rockchip,rk3328-crypto",
	.data = &rk3328_variant,
	},
	{ .compatible = "rockchip,rk3399-crypto",
	.data = &rk3399_variant,
	},
	{}
	};
	MODULE_DEVICE_TABLE(of, crypto_of_id_table);

	static int rk_crypto_probe(struct platform_device *pdev)
	{
	struct device *dev = &pdev->dev;
	struct rk_crypto_info crypto_info, first;
	int err = 0;

	crypto_info = devm_kzalloc(&pdev->dev,
	sizeof(*crypto_info), GFP_KERNEL);
	if (!crypto_info) {
	err = -ENOMEM;
	goto err_crypto;
	}

	crypto_info->dev = &pdev->dev;
	platform_set_drvdata(pdev, crypto_info);

	crypto_info->variant = of_device_get_match_data(&pdev->dev);
	if (!crypto_info->variant) {
	dev_err(&pdev->dev, "Missing variant\n");
	return -EINVAL;
	}

	crypto_info->rst = devm_reset_control_array_get_exclusive(dev);
	if (IS_ERR(crypto_info->rst)) {
	err = PTR_ERR(crypto_info->rst);
	goto err_crypto;
	}

	reset_control_assert(crypto_info->rst);
	usleep_range(10, 20);
	reset_control_deassert(crypto_info->rst);

	crypto_info->reg = devm_platform_ioremap_resource(pdev, 0);
	if (IS_ERR(crypto_info->reg)) {
	err = PTR_ERR(crypto_info->reg);
	goto err_crypto;
	}

	err = rk_crypto_get_clks(crypto_info);
	if (err)
	goto err_crypto;

	crypto_info->irq = platform_get_irq(pdev, 0);
	if (crypto_info->irq < 0) {
	err = crypto_info->irq;
	goto err_crypto;
	}

	err = devm_request_irq(&pdev->dev, crypto_info->irq,
	rk_crypto_irq_handle, IRQF_SHARED,
	"rk-crypto", pdev);

	if (err) {
	dev_err(&pdev->dev, "irq request failed.\n");
	goto err_crypto;
	}

	crypto_info->engine = crypto_engine_alloc_init(&pdev->dev, true);
	if (!crypto_info->engine) {
	err = -ENOMEM;
	goto err_crypto;
	}

	crypto_engine_start(crypto_info->engine);
	init_completion(&crypto_info->complete);

	err = rk_crypto_pm_init(crypto_info);
	if (err)
	goto err_pm;

	spin_lock(&rocklist.lock);
	first = list_first_entry_or_null(&rocklist.dev_list,
	struct rk_crypto_info, list);
	list_add_tail(&crypto_info->list, &rocklist.dev_list);
	spin_unlock(&rocklist.lock);

	if (!first) {
	err = rk_crypto_register(crypto_info);
	if (err) {
	dev_err(dev, "Fail to register crypto algorithms");
	goto err_register_alg;
	}

	register_debugfs(crypto_info);
	}

	return 0;

	err_register_alg:
	rk_crypto_pm_exit(crypto_info);
	err_pm:
	crypto_engine_exit(crypto_info->engine);
	err_crypto:
	dev_err(dev, "Crypto Accelerator not successfully registered\n");
	return err;
	}

	static void rk_crypto_remove(struct platform_device *pdev)
	{
	struct rk_crypto_info *crypto_tmp = platform_get_drvdata(pdev);
	struct rk_crypto_info *first;

	spin_lock_bh(&rocklist.lock);
	list_del(&crypto_tmp->list);
	first = list_first_entry_or_null(&rocklist.dev_list,
	struct rk_crypto_info, list);
	spin_unlock_bh(&rocklist.lock);

	if (!first) {
	#ifdef CONFIG_CRYPTO_DEV_ROCKCHIP_DEBUG
	debugfs_remove_recursive(rocklist.dbgfs_dir);
	#endif
	rk_crypto_unregister();
	}
	rk_crypto_pm_exit(crypto_tmp);
	crypto_engine_exit(crypto_tmp->engine);
	}

	static struct platform_driver crypto_driver = {
	.probe = rk_crypto_probe,
	.remove_new = rk_crypto_remove,
	.driver = {
	.name = "rk3288-crypto",
	.pm = &rk_crypto_pm_ops,
	.of_match_table = crypto_of_id_table,
	},
	};

	module_platform_driver(crypto_driver);

	MODULE_AUTHOR("Zain Wang <zain.wang@rock-chips.com>");
	MODULE_DESCRIPTION("Support for Rockchip's cryptographic engine");
	MODULE_LICENSE("GPL");