In order to align with st21nfca, dts configuration properties ese_present
and uicc_present are made available in st-nci driver.
So far, in early development firmware, because nci_nfcee_mode_set(DISABLE)
was not supported pushed us to try to enable during the secure element
discovery phase.
After several trials on commercial and qualified firmware it appears that
nci_nfcee_mode_set(ENABLE) and nci_nfcee_mode_set(DISABLE) are properly
supported.
Such feature also help us to eventually save some time (~5ms) if only
one secure element is connected.
Acked-by: Rob Herring <robh@xxxxxxxxxx>
Signed-off-by: Christophe Ricard <christophe-h.ricard@xxxxxx>
---
.../devicetree/bindings/net/nfc/st-nci-i2c.txt | 7 ++
.../devicetree/bindings/net/nfc/st-nci-spi.txt | 9 +-
drivers/nfc/st-nci/core.c | 4 +-
drivers/nfc/st-nci/i2c.c | 12 ++-
drivers/nfc/st-nci/ndlc.c | 6 +-
drivers/nfc/st-nci/ndlc.h | 5 +-
drivers/nfc/st-nci/se.c | 98 ++++++++++++++--------
drivers/nfc/st-nci/spi.c | 12 ++-
drivers/nfc/st-nci/st-nci.h | 13 ++-
include/linux/platform_data/st-nci.h | 2 +
10 files changed, 122 insertions(+), 46 deletions(-)
diff --git a/Documentation/devicetree/bindings/net/nfc/st-nci-i2c.txt b/Documentation/devicetree/bindings/net/nfc/st-nci-i2c.txt
index d707588..263732e 100644
--- a/Documentation/devicetree/bindings/net/nfc/st-nci-i2c.txt
+++ b/Documentation/devicetree/bindings/net/nfc/st-nci-i2c.txt
@@ -11,6 +11,10 @@ Required properties:
Optional SoC Specific Properties:
- pinctrl-names: Contains only one value - "default".
- pintctrl-0: Specifies the pin control groups used for this controller.
+- ese-present: Specifies that an ese is physically connected to the nfc
+controller.
+- uicc-present: Specifies that the uicc swp signal can be physically
+connected to the nfc controller.
Example (for ARM-based BeagleBoard xM with ST21NFCB on I2C2):
@@ -29,5 +33,8 @@ Example (for ARM-based BeagleBoard xM with ST21NFCB on I2C2):
interrupts = <2 IRQ_TYPE_LEVEL_HIGH>;
reset-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>;
+
+ ese-present;
+ uicc-present;
};
};
diff --git a/Documentation/devicetree/bindings/net/nfc/st-nci-spi.txt b/Documentation/devicetree/bindings/net/nfc/st-nci-spi.txt
index 525681b..711ca85 100644
--- a/Documentation/devicetree/bindings/net/nfc/st-nci-spi.txt
+++ b/Documentation/devicetree/bindings/net/nfc/st-nci-spi.txt
@@ -2,7 +2,7 @@
Required properties:
- compatible: Should be "st,st21nfcb-spi"
-- spi-max-frequency: Maximum SPI frequency (<= 10000000).
+- spi-max-frequency: Maximum SPI frequency (<= 4000000).
- interrupt-parent: phandle for the interrupt gpio controller
- interrupts: GPIO interrupt to which the chip is connected
- reset-gpios: Output GPIO pin used to reset the ST21NFCB
@@ -10,6 +10,10 @@ Required properties:
Optional SoC Specific Properties:
- pinctrl-names: Contains only one value - "default".
- pintctrl-0: Specifies the pin control groups used for this controller.
+- ese-present: Specifies that an ese is physically connected to the nfc
+controller.
+- uicc-present: Specifies that the uicc swp signal can be physically
+connected to the nfc controller.
Example (for ARM-based BeagleBoard xM with ST21NFCB on SPI4):
@@ -27,5 +31,8 @@ Example (for ARM-based BeagleBoard xM with ST21NFCB on SPI4):
interrupts = <2 IRQ_TYPE_EDGE_RISING>;
reset-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>;
+
+ ese-present;
+ uicc-present;
};
};
diff --git a/drivers/nfc/st-nci/core.c b/drivers/nfc/st-nci/core.c
index 6b083ed..ccf7237 100644
--- a/drivers/nfc/st-nci/core.c
+++ b/drivers/nfc/st-nci/core.c
@@ -123,7 +123,7 @@ static struct nci_ops st_nci_ops = {
};
int st_nci_probe(struct llt_ndlc *ndlc, int phy_headroom,
- int phy_tailroom)
+ int phy_tailroom, struct st_nci_se_status *se_status)
{
struct st_nci_info *info;
int r;
@@ -164,7 +164,7 @@ int st_nci_probe(struct llt_ndlc *ndlc, int phy_headroom,
goto err_reg_dev;
}
- return st_nci_se_init(ndlc->ndev);
+ return st_nci_se_init(ndlc->ndev, se_status);
err_reg_dev:
nci_free_device(ndlc->ndev);
diff --git a/drivers/nfc/st-nci/i2c.c b/drivers/nfc/st-nci/i2c.c
index 02e585f..172cbc3 100644
--- a/drivers/nfc/st-nci/i2c.c
+++ b/drivers/nfc/st-nci/i2c.c
@@ -52,6 +52,8 @@ struct st_nci_i2c_phy {
unsigned int gpio_reset;
unsigned int irq_polarity;
+
+ struct st_nci_se_status se_status;
};
#define I2C_DUMP_SKB(info, skb) \
@@ -245,6 +247,11 @@ static int st_nci_i2c_of_request_resources(struct i2c_client *client)
phy->irq_polarity = irq_get_trigger_type(client->irq);
+ phy->se_status.is_ese_present =
+ of_property_read_bool(pp, "ese-present");
+ phy->se_status.is_uicc_present =
+ of_property_read_bool(pp, "uicc-present");
+
return 0;
}
#else
@@ -277,6 +284,9 @@ static int st_nci_i2c_request_resources(struct i2c_client *client)
return r;
}
+ phy->se_status.is_ese_present = pdata->is_ese_present;
+ phy->se_status.is_uicc_present = pdata->is_uicc_present;
+
return 0;
}
@@ -326,7 +336,7 @@ static int st_nci_i2c_probe(struct i2c_client *client,
r = ndlc_probe(phy, &i2c_phy_ops, &client->dev,
ST_NCI_FRAME_HEADROOM, ST_NCI_FRAME_TAILROOM,
- &phy->ndlc);
+ &phy->ndlc, &phy->se_status);
if (r < 0) {
nfc_err(&client->dev, "Unable to register ndlc layer\n");
return r;
diff --git a/drivers/nfc/st-nci/ndlc.c b/drivers/nfc/st-nci/ndlc.c
index fb50007..0884b11 100644
--- a/drivers/nfc/st-nci/ndlc.c
+++ b/drivers/nfc/st-nci/ndlc.c
@@ -20,6 +20,7 @@
#include <net/nfc/nci_core.h>
#include "st-nci.h"
+#include "ndlc.h"
#define NDLC_TIMER_T1 100
#define NDLC_TIMER_T1_WAIT 400
@@ -265,7 +266,8 @@ static void ndlc_t2_timeout(unsigned long data)
}
int ndlc_probe(void *phy_id, struct nfc_phy_ops *phy_ops, struct device *dev,
- int phy_headroom, int phy_tailroom, struct llt_ndlc **ndlc_id)
+ int phy_headroom, int phy_tailroom, struct llt_ndlc **ndlc_id,
+ struct st_nci_se_status *se_status)
{
struct llt_ndlc *ndlc;
@@ -295,7 +297,7 @@ int ndlc_probe(void *phy_id, struct nfc_phy_ops *phy_ops, struct device *dev,
INIT_WORK(&ndlc->sm_work, llt_ndlc_sm_work);
- return st_nci_probe(ndlc, phy_headroom, phy_tailroom);
+ return st_nci_probe(ndlc, phy_headroom, phy_tailroom, se_status);
}
EXPORT_SYMBOL(ndlc_probe);
diff --git a/drivers/nfc/st-nci/ndlc.h b/drivers/nfc/st-nci/ndlc.h
index 6361005..bdf78ff 100644
--- a/drivers/nfc/st-nci/ndlc.h
+++ b/drivers/nfc/st-nci/ndlc.h
@@ -22,6 +22,8 @@
#include <linux/skbuff.h>
#include <net/nfc/nfc.h>
+struct st_nci_se_status;
+
/* Low Level Transport description */
struct llt_ndlc {
struct nci_dev *ndev;
@@ -55,6 +57,7 @@ void ndlc_close(struct llt_ndlc *ndlc);
int ndlc_send(struct llt_ndlc *ndlc, struct sk_buff *skb);
void ndlc_recv(struct llt_ndlc *ndlc, struct sk_buff *skb);
int ndlc_probe(void *phy_id, struct nfc_phy_ops *phy_ops, struct device *dev,
- int phy_headroom, int phy_tailroom, struct llt_ndlc **ndlc_id);
+ int phy_headroom, int phy_tailroom, struct llt_ndlc **ndlc_id,
+ struct st_nci_se_status *se_status);
void ndlc_remove(struct llt_ndlc *ndlc);
#endif /* __LOCAL_NDLC_H__ */
diff --git a/drivers/nfc/st-nci/se.c b/drivers/nfc/st-nci/se.c
index 2812884..147e2d9 100644
--- a/drivers/nfc/st-nci/se.c
+++ b/drivers/nfc/st-nci/se.c
@@ -419,12 +419,8 @@ void st_nci_hci_cmd_received(struct nci_dev *ndev, u8 pipe, u8 cmd,
}
EXPORT_SYMBOL_GPL(st_nci_hci_cmd_received);
-/*
- * Remarks: On some early st_nci firmware, nci_nfcee_mode_set(0)
- * is rejected
- */
static int st_nci_control_se(struct nci_dev *ndev, u8 se_idx,
- u8 state)
+ u8 state)
{
struct st_nci_info *info = nci_get_drvdata(ndev);
int r;
@@ -449,7 +445,7 @@ static int st_nci_control_se(struct nci_dev *ndev, u8 se_idx,
* retrieve a relevant host list.
*/
reinit_completion(&info->se_info.req_completion);
- r = nci_nfcee_mode_set(ndev, se_idx, NCI_NFCEE_ENABLE);
+ r = nci_nfcee_mode_set(ndev, se_idx, state);
if (r != NCI_STATUS_OK)
return r;
@@ -465,7 +461,9 @@ static int st_nci_control_se(struct nci_dev *ndev, u8 se_idx,
* There is no possible synchronization to prevent this.
* Adding a small delay is the only way to solve the issue.
*/
- usleep_range(3000, 5000);
+ if (info->se_info.se_status->is_ese_present &&
+ info->se_info.se_status->is_uicc_present)
+ usleep_range(3000, 5000);
r = nci_hci_get_param(ndev, NCI_HCI_ADMIN_GATE,
NCI_HCI_ADMIN_PARAM_HOST_LIST, &sk_host_list);
@@ -488,11 +486,20 @@ int st_nci_disable_se(struct nci_dev *ndev, u32 se_idx)
pr_debug("st_nci_disable_se\n");
- if (se_idx == NFC_SE_EMBEDDED) {
- r = nci_hci_send_event(ndev, ST_NCI_APDU_READER_GATE,
- ST_NCI_EVT_SE_END_OF_APDU_TRANSFER, NULL, 0);
- if (r < 0)
- return r;
+ /*
+ * According to upper layer, se_idx == NFC_SE_UICC when
+ * info->se_info.se_status->is_uicc_enable is true should never happen
+ * Same for eSE.
+ */
+ r = st_nci_control_se(ndev, se_idx, ST_NCI_SE_MODE_OFF);
+ if (r < 0) {
+ /* Do best effort to release SWP */
+ if (se_idx == NFC_SE_EMBEDDED) {
+ r = nci_hci_send_event(ndev, ST_NCI_APDU_READER_GATE,
+ ST_NCI_EVT_SE_END_OF_APDU_TRANSFER,
+ NULL, 0);
+ }
+ return r;
}
return 0;
@@ -505,11 +512,25 @@ int st_nci_enable_se(struct nci_dev *ndev, u32 se_idx)
pr_debug("st_nci_enable_se\n");
- if (se_idx == ST_NCI_HCI_HOST_ID_ESE) {
+ /*
+ * According to upper layer, se_idx == NFC_SE_UICC when
+ * info->se_info.se_status->is_uicc_enable is true should never happen.
+ * Same for eSE.
+ */
+ r = st_nci_control_se(ndev, se_idx, ST_NCI_SE_MODE_ON);
+ if (r == ST_NCI_HCI_HOST_ID_ESE) {
+ st_nci_se_get_atr(ndev);
r = nci_hci_send_event(ndev, ST_NCI_APDU_READER_GATE,
ST_NCI_EVT_SE_SOFT_RESET, NULL, 0);
- if (r < 0)
- return r;
+ }
+
+ if (r < 0) {
+ /*
+ * The activation procedure failed, the secure element
+ * is not connected. Remove from the list.
+ */
+ nfc_remove_se(ndev->nfc_dev, se_idx);
+ return r;
}
return 0;
@@ -592,8 +613,8 @@ exit:
int st_nci_discover_se(struct nci_dev *ndev)
{
- u8 param[2];
- int r;
+ u8 white_list[2];
+ int r, wl_size = 0;
int se_count = 0;
struct st_nci_info *info = nci_get_drvdata(ndev);
@@ -606,29 +627,34 @@ int st_nci_discover_se(struct nci_dev *ndev)
if (test_bit(ST_NCI_FACTORY_MODE, &info->flags))
return 0;
- param[0] = ST_NCI_UICC_HOST_ID;
- param[1] = ST_NCI_HCI_HOST_ID_ESE;
- r = nci_hci_set_param(ndev, NCI_HCI_ADMIN_GATE,
- NCI_HCI_ADMIN_PARAM_WHITELIST,
- param, sizeof(param));
- if (r != NCI_HCI_ANY_OK)
- return r;
+ if (info->se_info.se_status->is_ese_present &&
+ info->se_info.se_status->is_uicc_present) {
+ white_list[wl_size++] = ST_NCI_UICC_HOST_ID;
+ white_list[wl_size++] = ST_NCI_ESE_HOST_ID;
+ } else if (!info->se_info.se_status->is_ese_present &&
+ info->se_info.se_status->is_uicc_present) {
+ white_list[wl_size++] = ST_NCI_UICC_HOST_ID;
+ } else if (info->se_info.se_status->is_ese_present &&
+ !info->se_info.se_status->is_uicc_present) {
+ white_list[wl_size++] = ST_NCI_ESE_HOST_ID;
+ }
+
+ if (wl_size) {
+ r = nci_hci_set_param(ndev, NCI_HCI_ADMIN_GATE,
+ NCI_HCI_ADMIN_PARAM_WHITELIST,
+ white_list, wl_size);
+ if (r != NCI_HCI_ANY_OK)
+ return r;
+ }
- r = st_nci_control_se(ndev, ST_NCI_UICC_HOST_ID,
- ST_NCI_SE_MODE_ON);
- if (r == ST_NCI_UICC_HOST_ID) {
+ if (info->se_info.se_status->is_uicc_present) {
nfc_add_se(ndev->nfc_dev, ST_NCI_UICC_HOST_ID, NFC_SE_UICC);
se_count++;
}
- /* Try to enable eSE in order to check availability */
- r = st_nci_control_se(ndev, ST_NCI_HCI_HOST_ID_ESE,
- ST_NCI_SE_MODE_ON);
- if (r == ST_NCI_HCI_HOST_ID_ESE) {
- nfc_add_se(ndev->nfc_dev, ST_NCI_HCI_HOST_ID_ESE,
- NFC_SE_EMBEDDED);
+ if (info->se_info.se_status->is_ese_present) {
+ nfc_add_se(ndev->nfc_dev, ST_NCI_ESE_HOST_ID, NFC_SE_EMBEDDED);
se_count++;
- st_nci_se_get_atr(ndev);
}
return !se_count;
@@ -701,7 +727,7 @@ static void st_nci_se_activation_timeout(unsigned long data)
complete(&info->se_info.req_completion);
}
-int st_nci_se_init(struct nci_dev *ndev)
+int st_nci_se_init(struct nci_dev *ndev, struct st_nci_se_status *se_status)
{
struct st_nci_info *info = nci_get_drvdata(ndev);
@@ -723,6 +749,8 @@ int st_nci_se_init(struct nci_dev *ndev)
info->se_info.wt_timeout =
ST_NCI_BWI_TO_TIMEOUT(ST_NCI_ATR_DEFAULT_BWI);
+ info->se_info.se_status = se_status;
+
return 0;
}
EXPORT_SYMBOL(st_nci_se_init);
diff --git a/drivers/nfc/st-nci/spi.c b/drivers/nfc/st-nci/spi.c
index b43f448..8897203 100644
--- a/drivers/nfc/st-nci/spi.c
+++ b/drivers/nfc/st-nci/spi.c
@@ -53,6 +53,8 @@ struct st_nci_spi_phy {
unsigned int gpio_reset;
unsigned int irq_polarity;
+
+ struct st_nci_se_status se_status;
};
#define SPI_DUMP_SKB(info, skb) \
@@ -260,6 +262,11 @@ static int st_nci_spi_of_request_resources(struct spi_device *dev)
phy->irq_polarity = irq_get_trigger_type(dev->irq);
+ phy->se_status.is_ese_present =
+ of_property_read_bool(pp, "ese-present");
+ phy->se_status.is_uicc_present =
+ of_property_read_bool(pp, "uicc-present");
+
return 0;
}
#else
@@ -292,6 +299,9 @@ static int st_nci_spi_request_resources(struct spi_device *dev)
return r;
}
+ phy->se_status.is_ese_present = pdata->is_ese_present;
+ phy->se_status.is_uicc_present = pdata->is_uicc_present;
+
return 0;
}
@@ -342,7 +352,7 @@ static int st_nci_spi_probe(struct spi_device *dev)
r = ndlc_probe(phy, &spi_phy_ops, &dev->dev,
ST_NCI_FRAME_HEADROOM, ST_NCI_FRAME_TAILROOM,
- &phy->ndlc);
+ &phy->ndlc, &phy->se_status);
if (r < 0) {
nfc_err(&dev->dev, "Unable to register ndlc layer\n");
return r;
diff --git a/drivers/nfc/st-nci/st-nci.h b/drivers/nfc/st-nci/st-nci.h
index c68d538..b07aded 100644
--- a/drivers/nfc/st-nci/st-nci.h
+++ b/drivers/nfc/st-nci/st-nci.h
@@ -48,7 +48,13 @@ struct nci_mode_set_rsp {
u8 status;
} __packed;
+struct st_nci_se_status {
+ bool is_ese_present;
+ bool is_uicc_present;
+};
+
struct st_nci_se_info {
+ struct st_nci_se_status *se_status;
u8 atr[ST_NCI_ESE_MAX_LENGTH];
struct completion req_completion;
@@ -126,15 +132,16 @@ struct st_nci_vendor_info {
struct st_nci_info {
struct llt_ndlc *ndlc;
unsigned long flags;
+
struct st_nci_se_info se_info;
struct st_nci_vendor_info vendor_info;
};
void st_nci_remove(struct nci_dev *ndev);
int st_nci_probe(struct llt_ndlc *ndlc, int phy_headroom,
- int phy_tailroom);
+ int phy_tailroom, struct st_nci_se_status *se_status);
-int st_nci_se_init(struct nci_dev *ndev);
+int st_nci_se_init(struct nci_dev *ndev, struct st_nci_se_status *se_status);
void st_nci_se_deinit(struct nci_dev *ndev);
int st_nci_discover_se(struct nci_dev *ndev);
@@ -150,7 +157,7 @@ void st_nci_hci_cmd_received(struct nci_dev *ndev, u8 pipe, u8 cmd,
struct sk_buff *skb);
void st_nci_hci_loopback_event_received(struct nci_dev *ndev, u8 event,
- struct sk_buff *skb);
+ struct sk_buff *skb);
int st_nci_vendor_cmds_init(struct nci_dev *ndev);
#endif /* __LOCAL_ST_NCI_H_ */
diff --git a/include/linux/platform_data/st-nci.h b/include/linux/platform_data/st-nci.h
index d9d400a..f6494b3 100644
--- a/include/linux/platform_data/st-nci.h
+++ b/include/linux/platform_data/st-nci.h
@@ -24,6 +24,8 @@
struct st_nci_nfc_platform_data {
unsigned int gpio_reset;
unsigned int irq_polarity;
+ bool is_ese_present;
+ bool is_uicc_present;
};
#endif /* _ST_NCI_H_ */
--
2.1.4
--
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