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-rw-r--r--Documentation/devicetree/bindings/crypto/atmel-crypto.txt68
-rw-r--r--drivers/crypto/atmel-aes.c143
-rw-r--r--drivers/crypto/atmel-sha.c103
-rw-r--r--drivers/crypto/atmel-tdes.c143
4 files changed, 334 insertions, 123 deletions
diff --git a/Documentation/devicetree/bindings/crypto/atmel-crypto.txt b/Documentation/devicetree/bindings/crypto/atmel-crypto.txt
new file mode 100644
index 000000000000..f2aab3dc2b52
--- /dev/null
+++ b/Documentation/devicetree/bindings/crypto/atmel-crypto.txt
@@ -0,0 +1,68 @@
+* Atmel HW cryptographic accelerators
+
+These are the HW cryptographic accelerators found on some Atmel products.
+
+* Advanced Encryption Standard (AES)
+
+Required properties:
+- compatible : Should be "atmel,at91sam9g46-aes".
+- reg: Should contain AES registers location and length.
+- interrupts: Should contain the IRQ line for the AES.
+- dmas: List of two DMA specifiers as described in
+ atmel-dma.txt and dma.txt files.
+- dma-names: Contains one identifier string for each DMA specifier
+ in the dmas property.
+
+Example:
+aes@f8038000 {
+ compatible = "atmel,at91sam9g46-aes";
+ reg = <0xf8038000 0x100>;
+ interrupts = <43 4 0>;
+ dmas = <&dma1 2 18>,
+ <&dma1 2 19>;
+ dma-names = "tx", "rx";
+
+* Triple Data Encryption Standard (Triple DES)
+
+Required properties:
+- compatible : Should be "atmel,at91sam9g46-tdes".
+- reg: Should contain TDES registers location and length.
+- interrupts: Should contain the IRQ line for the TDES.
+
+Optional properties:
+- dmas: List of two DMA specifiers as described in
+ atmel-dma.txt and dma.txt files.
+- dma-names: Contains one identifier string for each DMA specifier
+ in the dmas property.
+
+Example:
+tdes@f803c000 {
+ compatible = "atmel,at91sam9g46-tdes";
+ reg = <0xf803c000 0x100>;
+ interrupts = <44 4 0>;
+ dmas = <&dma1 2 20>,
+ <&dma1 2 21>;
+ dma-names = "tx", "rx";
+};
+
+* Secure Hash Algorithm (SHA)
+
+Required properties:
+- compatible : Should be "atmel,at91sam9g46-sha".
+- reg: Should contain SHA registers location and length.
+- interrupts: Should contain the IRQ line for the SHA.
+
+Optional properties:
+- dmas: One DMA specifiers as described in
+ atmel-dma.txt and dma.txt files.
+- dma-names: Contains one identifier string for each DMA specifier
+ in the dmas property. Only one "tx" string needed.
+
+Example:
+sha@f8034000 {
+ compatible = "atmel,at91sam9g46-sha";
+ reg = <0xf8034000 0x100>;
+ interrupts = <42 4 0>;
+ dmas = <&dma1 2 17>;
+ dma-names = "tx";
+};
diff --git a/drivers/crypto/atmel-aes.c b/drivers/crypto/atmel-aes.c
index c1efd910d97b..d7c9e317423c 100644
--- a/drivers/crypto/atmel-aes.c
+++ b/drivers/crypto/atmel-aes.c
@@ -30,6 +30,7 @@
#include <linux/irq.h>
#include <linux/scatterlist.h>
#include <linux/dma-mapping.h>
+#include <linux/of_device.h>
#include <linux/delay.h>
#include <linux/crypto.h>
#include <linux/cryptohash.h>
@@ -39,6 +40,7 @@
#include <crypto/hash.h>
#include <crypto/internal/hash.h>
#include <linux/platform_data/crypto-atmel.h>
+#include <dt-bindings/dma/at91.h>
#include "atmel-aes-regs.h"
#define CFB8_BLOCK_SIZE 1
@@ -747,59 +749,50 @@ static int atmel_aes_dma_init(struct atmel_aes_dev *dd,
struct crypto_platform_data *pdata)
{
int err = -ENOMEM;
- dma_cap_mask_t mask_in, mask_out;
+ dma_cap_mask_t mask;
+
+ dma_cap_zero(mask);
+ dma_cap_set(DMA_SLAVE, mask);
+
+ /* Try to grab 2 DMA channels */
+ dd->dma_lch_in.chan = dma_request_slave_channel_compat(mask,
+ atmel_aes_filter, &pdata->dma_slave->rxdata, dd->dev, "tx");
+ if (!dd->dma_lch_in.chan)
+ goto err_dma_in;
+
+ dd->dma_lch_in.dma_conf.direction = DMA_MEM_TO_DEV;
+ dd->dma_lch_in.dma_conf.dst_addr = dd->phys_base +
+ AES_IDATAR(0);
+ dd->dma_lch_in.dma_conf.src_maxburst = dd->caps.max_burst_size;
+ dd->dma_lch_in.dma_conf.src_addr_width =
+ DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dd->dma_lch_in.dma_conf.dst_maxburst = dd->caps.max_burst_size;
+ dd->dma_lch_in.dma_conf.dst_addr_width =
+ DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dd->dma_lch_in.dma_conf.device_fc = false;
+
+ dd->dma_lch_out.chan = dma_request_slave_channel_compat(mask,
+ atmel_aes_filter, &pdata->dma_slave->txdata, dd->dev, "rx");
+ if (!dd->dma_lch_out.chan)
+ goto err_dma_out;
+
+ dd->dma_lch_out.dma_conf.direction = DMA_DEV_TO_MEM;
+ dd->dma_lch_out.dma_conf.src_addr = dd->phys_base +
+ AES_ODATAR(0);
+ dd->dma_lch_out.dma_conf.src_maxburst = dd->caps.max_burst_size;
+ dd->dma_lch_out.dma_conf.src_addr_width =
+ DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dd->dma_lch_out.dma_conf.dst_maxburst = dd->caps.max_burst_size;
+ dd->dma_lch_out.dma_conf.dst_addr_width =
+ DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dd->dma_lch_out.dma_conf.device_fc = false;
- if (pdata && pdata->dma_slave->txdata.dma_dev &&
- pdata->dma_slave->rxdata.dma_dev) {
-
- /* Try to grab 2 DMA channels */
- dma_cap_zero(mask_in);
- dma_cap_set(DMA_SLAVE, mask_in);
-
- dd->dma_lch_in.chan = dma_request_channel(mask_in,
- atmel_aes_filter, &pdata->dma_slave->rxdata);
-
- if (!dd->dma_lch_in.chan)
- goto err_dma_in;
-
- dd->dma_lch_in.dma_conf.direction = DMA_MEM_TO_DEV;
- dd->dma_lch_in.dma_conf.dst_addr = dd->phys_base +
- AES_IDATAR(0);
- dd->dma_lch_in.dma_conf.src_maxburst = dd->caps.max_burst_size;
- dd->dma_lch_in.dma_conf.src_addr_width =
- DMA_SLAVE_BUSWIDTH_4_BYTES;
- dd->dma_lch_in.dma_conf.dst_maxburst = dd->caps.max_burst_size;
- dd->dma_lch_in.dma_conf.dst_addr_width =
- DMA_SLAVE_BUSWIDTH_4_BYTES;
- dd->dma_lch_in.dma_conf.device_fc = false;
-
- dma_cap_zero(mask_out);
- dma_cap_set(DMA_SLAVE, mask_out);
- dd->dma_lch_out.chan = dma_request_channel(mask_out,
- atmel_aes_filter, &pdata->dma_slave->txdata);
-
- if (!dd->dma_lch_out.chan)
- goto err_dma_out;
-
- dd->dma_lch_out.dma_conf.direction = DMA_DEV_TO_MEM;
- dd->dma_lch_out.dma_conf.src_addr = dd->phys_base +
- AES_ODATAR(0);
- dd->dma_lch_out.dma_conf.src_maxburst = dd->caps.max_burst_size;
- dd->dma_lch_out.dma_conf.src_addr_width =
- DMA_SLAVE_BUSWIDTH_4_BYTES;
- dd->dma_lch_out.dma_conf.dst_maxburst = dd->caps.max_burst_size;
- dd->dma_lch_out.dma_conf.dst_addr_width =
- DMA_SLAVE_BUSWIDTH_4_BYTES;
- dd->dma_lch_out.dma_conf.device_fc = false;
-
- return 0;
- } else {
- return -ENODEV;
- }
+ return 0;
err_dma_out:
dma_release_channel(dd->dma_lch_in.chan);
err_dma_in:
+ dev_warn(dd->dev, "no DMA channel available\n");
return err;
}
@@ -1261,6 +1254,47 @@ static void atmel_aes_get_cap(struct atmel_aes_dev *dd)
}
}
+#if defined(CONFIG_OF)
+static const struct of_device_id atmel_aes_dt_ids[] = {
+ { .compatible = "atmel,at91sam9g46-aes" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, atmel_aes_dt_ids);
+
+static struct crypto_platform_data *atmel_aes_of_init(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct crypto_platform_data *pdata;
+
+ if (!np) {
+ dev_err(&pdev->dev, "device node not found\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata) {
+ dev_err(&pdev->dev, "could not allocate memory for pdata\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ pdata->dma_slave = devm_kzalloc(&pdev->dev,
+ sizeof(*(pdata->dma_slave)),
+ GFP_KERNEL);
+ if (!pdata->dma_slave) {
+ dev_err(&pdev->dev, "could not allocate memory for dma_slave\n");
+ devm_kfree(&pdev->dev, pdata);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ return pdata;
+}
+#else
+static inline struct crypto_platform_data *atmel_aes_of_init(struct platform_device *pdev)
+{
+ return ERR_PTR(-EINVAL);
+}
+#endif
+
static int atmel_aes_probe(struct platform_device *pdev)
{
struct atmel_aes_dev *aes_dd;
@@ -1272,6 +1306,14 @@ static int atmel_aes_probe(struct platform_device *pdev)
pdata = pdev->dev.platform_data;
if (!pdata) {
+ pdata = atmel_aes_of_init(pdev);
+ if (IS_ERR(pdata)) {
+ err = PTR_ERR(pdata);
+ goto aes_dd_err;
+ }
+ }
+
+ if (!pdata->dma_slave) {
err = -ENXIO;
goto aes_dd_err;
}
@@ -1358,7 +1400,9 @@ static int atmel_aes_probe(struct platform_device *pdev)
if (err)
goto err_algs;
- dev_info(dev, "Atmel AES\n");
+ dev_info(dev, "Atmel AES - Using %s, %s for DMA transfers\n",
+ dma_chan_name(aes_dd->dma_lch_in.chan),
+ dma_chan_name(aes_dd->dma_lch_out.chan));
return 0;
@@ -1424,6 +1468,7 @@ static struct platform_driver atmel_aes_driver = {
.driver = {
.name = "atmel_aes",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(atmel_aes_dt_ids),
},
};
diff --git a/drivers/crypto/atmel-sha.c b/drivers/crypto/atmel-sha.c
index eaed8bf183bc..0618be06b9fb 100644
--- a/drivers/crypto/atmel-sha.c
+++ b/drivers/crypto/atmel-sha.c
@@ -30,6 +30,7 @@
#include <linux/irq.h>
#include <linux/scatterlist.h>
#include <linux/dma-mapping.h>
+#include <linux/of_device.h>
#include <linux/delay.h>
#include <linux/crypto.h>
#include <linux/cryptohash.h>
@@ -1263,32 +1264,29 @@ static int atmel_sha_dma_init(struct atmel_sha_dev *dd,
int err = -ENOMEM;
dma_cap_mask_t mask_in;
- if (pdata && pdata->dma_slave->rxdata.dma_dev) {
- /* Try to grab DMA channel */
- dma_cap_zero(mask_in);
- dma_cap_set(DMA_SLAVE, mask_in);
+ /* Try to grab DMA channel */
+ dma_cap_zero(mask_in);
+ dma_cap_set(DMA_SLAVE, mask_in);
- dd->dma_lch_in.chan = dma_request_channel(mask_in,
- atmel_sha_filter, &pdata->dma_slave->rxdata);
-
- if (!dd->dma_lch_in.chan)
- return err;
-
- dd->dma_lch_in.dma_conf.direction = DMA_MEM_TO_DEV;
- dd->dma_lch_in.dma_conf.dst_addr = dd->phys_base +
- SHA_REG_DIN(0);
- dd->dma_lch_in.dma_conf.src_maxburst = 1;
- dd->dma_lch_in.dma_conf.src_addr_width =
- DMA_SLAVE_BUSWIDTH_4_BYTES;
- dd->dma_lch_in.dma_conf.dst_maxburst = 1;
- dd->dma_lch_in.dma_conf.dst_addr_width =
- DMA_SLAVE_BUSWIDTH_4_BYTES;
- dd->dma_lch_in.dma_conf.device_fc = false;
-
- return 0;
+ dd->dma_lch_in.chan = dma_request_slave_channel_compat(mask_in,
+ atmel_sha_filter, &pdata->dma_slave->rxdata, dd->dev, "tx");
+ if (!dd->dma_lch_in.chan) {
+ dev_warn(dd->dev, "no DMA channel available\n");
+ return err;
}
- return -ENODEV;
+ dd->dma_lch_in.dma_conf.direction = DMA_MEM_TO_DEV;
+ dd->dma_lch_in.dma_conf.dst_addr = dd->phys_base +
+ SHA_REG_DIN(0);
+ dd->dma_lch_in.dma_conf.src_maxburst = 1;
+ dd->dma_lch_in.dma_conf.src_addr_width =
+ DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dd->dma_lch_in.dma_conf.dst_maxburst = 1;
+ dd->dma_lch_in.dma_conf.dst_addr_width =
+ DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dd->dma_lch_in.dma_conf.device_fc = false;
+
+ return 0;
}
static void atmel_sha_dma_cleanup(struct atmel_sha_dev *dd)
@@ -1326,6 +1324,48 @@ static void atmel_sha_get_cap(struct atmel_sha_dev *dd)
}
}
+#if defined(CONFIG_OF)
+static const struct of_device_id atmel_sha_dt_ids[] = {
+ { .compatible = "atmel,at91sam9g46-sha" },
+ { /* sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(of, atmel_sha_dt_ids);
+
+static struct crypto_platform_data *atmel_sha_of_init(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct crypto_platform_data *pdata;
+
+ if (!np) {
+ dev_err(&pdev->dev, "device node not found\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata) {
+ dev_err(&pdev->dev, "could not allocate memory for pdata\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ pdata->dma_slave = devm_kzalloc(&pdev->dev,
+ sizeof(*(pdata->dma_slave)),
+ GFP_KERNEL);
+ if (!pdata->dma_slave) {
+ dev_err(&pdev->dev, "could not allocate memory for dma_slave\n");
+ devm_kfree(&pdev->dev, pdata);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ return pdata;
+}
+#else /* CONFIG_OF */
+static inline struct crypto_platform_data *atmel_sha_of_init(struct platform_device *dev)
+{
+ return ERR_PTR(-EINVAL);
+}
+#endif
+
static int atmel_sha_probe(struct platform_device *pdev)
{
struct atmel_sha_dev *sha_dd;
@@ -1402,13 +1442,23 @@ static int atmel_sha_probe(struct platform_device *pdev)
if (sha_dd->caps.has_dma) {
pdata = pdev->dev.platform_data;
if (!pdata) {
- dev_err(&pdev->dev, "platform data not available\n");
+ pdata = atmel_sha_of_init(pdev);
+ if (IS_ERR(pdata)) {
+ dev_err(&pdev->dev, "platform data not available\n");
+ err = PTR_ERR(pdata);
+ goto err_pdata;
+ }
+ }
+ if (!pdata->dma_slave) {
err = -ENXIO;
goto err_pdata;
}
err = atmel_sha_dma_init(sha_dd, pdata);
if (err)
goto err_sha_dma;
+
+ dev_info(dev, "using %s for DMA transfers\n",
+ dma_chan_name(sha_dd->dma_lch_in.chan));
}
spin_lock(&atmel_sha.lock);
@@ -1419,7 +1469,9 @@ static int atmel_sha_probe(struct platform_device *pdev)
if (err)
goto err_algs;
- dev_info(dev, "Atmel SHA1/SHA256\n");
+ dev_info(dev, "Atmel SHA1/SHA256%s%s\n",
+ sha_dd->caps.has_sha224 ? "/SHA224" : "",
+ sha_dd->caps.has_sha_384_512 ? "/SHA384/SHA512" : "");
return 0;
@@ -1483,6 +1535,7 @@ static struct platform_driver atmel_sha_driver = {
.driver = {
.name = "atmel_sha",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(atmel_sha_dt_ids),
},
};
diff --git a/drivers/crypto/atmel-tdes.c b/drivers/crypto/atmel-tdes.c
index 4a99564a08e6..6cde5b530c69 100644
--- a/drivers/crypto/atmel-tdes.c
+++ b/drivers/crypto/atmel-tdes.c
@@ -30,6 +30,7 @@
#include <linux/irq.h>
#include <linux/scatterlist.h>
#include <linux/dma-mapping.h>
+#include <linux/of_device.h>
#include <linux/delay.h>
#include <linux/crypto.h>
#include <linux/cryptohash.h>
@@ -716,59 +717,50 @@ static int atmel_tdes_dma_init(struct atmel_tdes_dev *dd,
struct crypto_platform_data *pdata)
{
int err = -ENOMEM;
- dma_cap_mask_t mask_in, mask_out;
+ dma_cap_mask_t mask;
+
+ dma_cap_zero(mask);
+ dma_cap_set(DMA_SLAVE, mask);
+
+ /* Try to grab 2 DMA channels */
+ dd->dma_lch_in.chan = dma_request_slave_channel_compat(mask,
+ atmel_tdes_filter, &pdata->dma_slave->rxdata, dd->dev, "tx");
+ if (!dd->dma_lch_in.chan)
+ goto err_dma_in;
+
+ dd->dma_lch_in.dma_conf.direction = DMA_MEM_TO_DEV;
+ dd->dma_lch_in.dma_conf.dst_addr = dd->phys_base +
+ TDES_IDATA1R;
+ dd->dma_lch_in.dma_conf.src_maxburst = 1;
+ dd->dma_lch_in.dma_conf.src_addr_width =
+ DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dd->dma_lch_in.dma_conf.dst_maxburst = 1;
+ dd->dma_lch_in.dma_conf.dst_addr_width =
+ DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dd->dma_lch_in.dma_conf.device_fc = false;
+
+ dd->dma_lch_out.chan = dma_request_slave_channel_compat(mask,
+ atmel_tdes_filter, &pdata->dma_slave->txdata, dd->dev, "rx");
+ if (!dd->dma_lch_out.chan)
+ goto err_dma_out;
+
+ dd->dma_lch_out.dma_conf.direction = DMA_DEV_TO_MEM;
+ dd->dma_lch_out.dma_conf.src_addr = dd->phys_base +
+ TDES_ODATA1R;
+ dd->dma_lch_out.dma_conf.src_maxburst = 1;
+ dd->dma_lch_out.dma_conf.src_addr_width =
+ DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dd->dma_lch_out.dma_conf.dst_maxburst = 1;
+ dd->dma_lch_out.dma_conf.dst_addr_width =
+ DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dd->dma_lch_out.dma_conf.device_fc = false;
- if (pdata && pdata->dma_slave->txdata.dma_dev &&
- pdata->dma_slave->rxdata.dma_dev) {
-
- /* Try to grab 2 DMA channels */
- dma_cap_zero(mask_in);
- dma_cap_set(DMA_SLAVE, mask_in);
-
- dd->dma_lch_in.chan = dma_request_channel(mask_in,
- atmel_tdes_filter, &pdata->dma_slave->rxdata);
-
- if (!dd->dma_lch_in.chan)
- goto err_dma_in;
-
- dd->dma_lch_in.dma_conf.direction = DMA_MEM_TO_DEV;
- dd->dma_lch_in.dma_conf.dst_addr = dd->phys_base +
- TDES_IDATA1R;
- dd->dma_lch_in.dma_conf.src_maxburst = 1;
- dd->dma_lch_in.dma_conf.src_addr_width =
- DMA_SLAVE_BUSWIDTH_4_BYTES;
- dd->dma_lch_in.dma_conf.dst_maxburst = 1;
- dd->dma_lch_in.dma_conf.dst_addr_width =
- DMA_SLAVE_BUSWIDTH_4_BYTES;
- dd->dma_lch_in.dma_conf.device_fc = false;
-
- dma_cap_zero(mask_out);
- dma_cap_set(DMA_SLAVE, mask_out);
- dd->dma_lch_out.chan = dma_request_channel(mask_out,
- atmel_tdes_filter, &pdata->dma_slave->txdata);
-
- if (!dd->dma_lch_out.chan)
- goto err_dma_out;
-
- dd->dma_lch_out.dma_conf.direction = DMA_DEV_TO_MEM;
- dd->dma_lch_out.dma_conf.src_addr = dd->phys_base +
- TDES_ODATA1R;
- dd->dma_lch_out.dma_conf.src_maxburst = 1;
- dd->dma_lch_out.dma_conf.src_addr_width =
- DMA_SLAVE_BUSWIDTH_4_BYTES;
- dd->dma_lch_out.dma_conf.dst_maxburst = 1;
- dd->dma_lch_out.dma_conf.dst_addr_width =
- DMA_SLAVE_BUSWIDTH_4_BYTES;
- dd->dma_lch_out.dma_conf.device_fc = false;
-
- return 0;
- } else {
- return -ENODEV;
- }
+ return 0;
err_dma_out:
dma_release_channel(dd->dma_lch_in.chan);
err_dma_in:
+ dev_warn(dd->dev, "no DMA channel available\n");
return err;
}
@@ -1317,6 +1309,47 @@ static void atmel_tdes_get_cap(struct atmel_tdes_dev *dd)
}
}
+#if defined(CONFIG_OF)
+static const struct of_device_id atmel_tdes_dt_ids[] = {
+ { .compatible = "atmel,at91sam9g46-tdes" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, atmel_tdes_dt_ids);
+
+static struct crypto_platform_data *atmel_tdes_of_init(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct crypto_platform_data *pdata;
+
+ if (!np) {
+ dev_err(&pdev->dev, "device node not found\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata) {
+ dev_err(&pdev->dev, "could not allocate memory for pdata\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ pdata->dma_slave = devm_kzalloc(&pdev->dev,
+ sizeof(*(pdata->dma_slave)),
+ GFP_KERNEL);
+ if (!pdata->dma_slave) {
+ dev_err(&pdev->dev, "could not allocate memory for dma_slave\n");
+ devm_kfree(&pdev->dev, pdata);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ return pdata;
+}
+#else /* CONFIG_OF */
+static inline struct crypto_platform_data *atmel_tdes_of_init(struct platform_device *pdev)
+{
+ return ERR_PTR(-EINVAL);
+}
+#endif
+
static int atmel_tdes_probe(struct platform_device *pdev)
{
struct atmel_tdes_dev *tdes_dd;
@@ -1399,13 +1432,24 @@ static int atmel_tdes_probe(struct platform_device *pdev)
if (tdes_dd->caps.has_dma) {
pdata = pdev->dev.platform_data;
if (!pdata) {
- dev_err(&pdev->dev, "platform data not available\n");
+ pdata = atmel_tdes_of_init(pdev);
+ if (IS_ERR(pdata)) {
+ dev_err(&pdev->dev, "platform data not available\n");
+ err = PTR_ERR(pdata);
+ goto err_pdata;
+ }
+ }
+ if (!pdata->dma_slave) {
err = -ENXIO;
goto err_pdata;
}
err = atmel_tdes_dma_init(tdes_dd, pdata);
if (err)
goto err_tdes_dma;
+
+ dev_info(dev, "using %s, %s for DMA transfers\n",
+ dma_chan_name(tdes_dd->dma_lch_in.chan),
+ dma_chan_name(tdes_dd->dma_lch_out.chan));
}
spin_lock(&atmel_tdes.lock);
@@ -1487,6 +1531,7 @@ static struct platform_driver atmel_tdes_driver = {
.driver = {
.name = "atmel_tdes",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(atmel_tdes_dt_ids),
},
};
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-30 22:23:50 +0000