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-rw-r--r--Documentation/devicetree/bindings/net/nfc/trf7970a.txt34
-rw-r--r--MAINTAINERS1
-rw-r--r--drivers/nfc/Kconfig12
-rw-r--r--drivers/nfc/Makefile1
-rw-r--r--drivers/nfc/pn533.c28
-rw-r--r--drivers/nfc/pn544/i2c.c194
-rw-r--r--drivers/nfc/pn544/pn544.c2
-rw-r--r--drivers/nfc/pn544/pn544.h3
-rw-r--r--drivers/nfc/port100.c25
-rw-r--r--drivers/nfc/trf7970a.c1370
-rw-r--r--include/net/nfc/digital.h7
-rw-r--r--include/net/nfc/nfc.h3
-rw-r--r--include/uapi/linux/nfc.h9
-rw-r--r--net/nfc/core.c10
-rw-r--r--net/nfc/digital.h6
-rw-r--r--net/nfc/digital_core.c67
-rw-r--r--net/nfc/digital_technology.c247
-rw-r--r--net/nfc/hci/llc.c4
-rw-r--r--net/nfc/llcp_core.c16
-rw-r--r--net/nfc/nci/core.c3
-rw-r--r--net/nfc/nci/spi.c3
-rw-r--r--net/nfc/netlink.c8
22 files changed, 1985 insertions, 68 deletions
diff --git a/Documentation/devicetree/bindings/net/nfc/trf7970a.txt b/Documentation/devicetree/bindings/net/nfc/trf7970a.txt
new file mode 100644
index 000000000000..8dd3ef7bc56b
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/nfc/trf7970a.txt
@@ -0,0 +1,34 @@
+* Texas Instruments TRF7970A RFID/NFC/15693 Transceiver
+
+Required properties:
+- compatible: Should be "ti,trf7970a".
+- spi-max-frequency: Maximum SPI frequency (<= 2000000).
+- interrupt-parent: phandle of parent interrupt handler.
+- interrupts: A single interrupt specifier.
+- ti,enable-gpios: Two GPIO entries used for 'EN' and 'EN2' pins on the
+ TRF7970A.
+- vin-supply: Regulator for supply voltage to VIN pin
+
+Optional SoC Specific Properties:
+- pinctrl-names: Contains only one value - "default".
+- pintctrl-0: Specifies the pin control groups used for this controller.
+
+Example (for ARM-based BeagleBone with TRF7970A on SPI1):
+
+&spi1 {
+ status = "okay";
+
+ nfc@0 {
+ compatible = "ti,trf7970a";
+ reg = <0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&trf7970a_default>;
+ spi-max-frequency = <2000000>;
+ interrupt-parent = <&gpio2>;
+ interrupts = <14 0>;
+ ti,enable-gpios = <&gpio2 2 GPIO_ACTIVE_LOW>,
+ <&gpio2 5 GPIO_ACTIVE_LOW>;
+ vin-supply = <&ldo3_reg>;
+ status = "okay";
+ };
+};
diff --git a/MAINTAINERS b/MAINTAINERS
index b2cf5cfb4d29..ec12265ac67b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6067,6 +6067,7 @@ F: include/net/nfc/
F: include/uapi/linux/nfc.h
F: drivers/nfc/
F: include/linux/platform_data/pn544.h
+F: Documentation/devicetree/bindings/net/nfc/
NFS, SUNRPC, AND LOCKD CLIENTS
M: Trond Myklebust <trond.myklebust@primarydata.com>
diff --git a/drivers/nfc/Kconfig b/drivers/nfc/Kconfig
index fe20e1cc0545..65d4ca19d132 100644
--- a/drivers/nfc/Kconfig
+++ b/drivers/nfc/Kconfig
@@ -26,6 +26,18 @@ config NFC_WILINK
Say Y here to compile support for Texas Instrument's NFC WiLink driver
into the kernel or say M to compile it as module.
+config NFC_TRF7970A
+ tristate "Texas Instruments TRF7970a NFC driver"
+ depends on SPI && NFC_DIGITAL
+ help
+ This option enables the NFC driver for Texas Instruments' TRF7970a
+ device. Such device supports 5 different protocols: ISO14443A,
+ ISO14443B, FeLiCa, ISO15693 and ISO18000-3.
+
+ Say Y here to compile support for TRF7970a into the kernel or
+ say M to compile it as a module. The module will be called
+ trf7970a.ko.
+
config NFC_MEI_PHY
tristate "MEI bus NFC device support"
depends on INTEL_MEI && NFC_HCI
diff --git a/drivers/nfc/Makefile b/drivers/nfc/Makefile
index 56ab822ba03d..ae42a3fa60c9 100644
--- a/drivers/nfc/Makefile
+++ b/drivers/nfc/Makefile
@@ -10,5 +10,6 @@ obj-$(CONFIG_NFC_MEI_PHY) += mei_phy.o
obj-$(CONFIG_NFC_SIM) += nfcsim.o
obj-$(CONFIG_NFC_PORT100) += port100.o
obj-$(CONFIG_NFC_MRVL) += nfcmrvl/
+obj-$(CONFIG_NFC_TRF7970A) += trf7970a.o
ccflags-$(CONFIG_NFC_DEBUG) := -DDEBUG
diff --git a/drivers/nfc/pn533.c b/drivers/nfc/pn533.c
index cf1a87bb74f8..d46a700a9637 100644
--- a/drivers/nfc/pn533.c
+++ b/drivers/nfc/pn533.c
@@ -55,26 +55,14 @@
NFC_PROTO_NFC_DEP_MASK)
static const struct usb_device_id pn533_table[] = {
- { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
- .idVendor = PN533_VENDOR_ID,
- .idProduct = PN533_PRODUCT_ID,
- .driver_info = PN533_DEVICE_STD,
- },
- { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
- .idVendor = SCM_VENDOR_ID,
- .idProduct = SCL3711_PRODUCT_ID,
- .driver_info = PN533_DEVICE_STD,
- },
- { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
- .idVendor = SONY_VENDOR_ID,
- .idProduct = PASORI_PRODUCT_ID,
- .driver_info = PN533_DEVICE_PASORI,
- },
- { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
- .idVendor = ACS_VENDOR_ID,
- .idProduct = ACR122U_PRODUCT_ID,
- .driver_info = PN533_DEVICE_ACR122U,
- },
+ { USB_DEVICE(PN533_VENDOR_ID, PN533_PRODUCT_ID),
+ .driver_info = PN533_DEVICE_STD },
+ { USB_DEVICE(SCM_VENDOR_ID, SCL3711_PRODUCT_ID),
+ .driver_info = PN533_DEVICE_STD },
+ { USB_DEVICE(SONY_VENDOR_ID, PASORI_PRODUCT_ID),
+ .driver_info = PN533_DEVICE_PASORI },
+ { USB_DEVICE(ACS_VENDOR_ID, ACR122U_PRODUCT_ID),
+ .driver_info = PN533_DEVICE_ACR122U },
{ }
};
MODULE_DEVICE_TABLE(usb, pn533_table);
diff --git a/drivers/nfc/pn544/i2c.c b/drivers/nfc/pn544/i2c.c
index d6185ff2f87b..f2acd85be86e 100644
--- a/drivers/nfc/pn544/i2c.c
+++ b/drivers/nfc/pn544/i2c.c
@@ -58,8 +58,19 @@ MODULE_DEVICE_TABLE(i2c, pn544_hci_i2c_id_table);
#define PN544_HCI_I2C_DRIVER_NAME "pn544_hci_i2c"
+/*
+ * Exposed through the 4 most significant bytes
+ * from the HCI SW_VERSION first byte, a.k.a.
+ * SW RomLib.
+ */
+#define PN544_HW_VARIANT_C2 0xa
+#define PN544_HW_VARIANT_C3 0xb
+
+#define PN544_FW_CMD_RESET 0x01
#define PN544_FW_CMD_WRITE 0x08
#define PN544_FW_CMD_CHECK 0x06
+#define PN544_FW_CMD_SECURE_WRITE 0x0C
+#define PN544_FW_CMD_SECURE_CHUNK_WRITE 0x0D
struct pn544_i2c_fw_frame_write {
u8 cmd;
@@ -88,13 +99,31 @@ struct pn544_i2c_fw_blob {
u8 data[];
};
+struct pn544_i2c_fw_secure_frame {
+ u8 cmd;
+ u16 be_datalen;
+ u8 data[];
+} __packed;
+
+struct pn544_i2c_fw_secure_blob {
+ u64 header;
+ u8 data[];
+};
+
#define PN544_FW_CMD_RESULT_TIMEOUT 0x01
#define PN544_FW_CMD_RESULT_BAD_CRC 0x02
#define PN544_FW_CMD_RESULT_ACCESS_DENIED 0x08
#define PN544_FW_CMD_RESULT_PROTOCOL_ERROR 0x0B
#define PN544_FW_CMD_RESULT_INVALID_PARAMETER 0x11
+#define PN544_FW_CMD_RESULT_UNSUPPORTED_COMMAND 0x13
#define PN544_FW_CMD_RESULT_INVALID_LENGTH 0x18
+#define PN544_FW_CMD_RESULT_CRYPTOGRAPHIC_ERROR 0x19
+#define PN544_FW_CMD_RESULT_VERSION_CONDITIONS_ERROR 0x1D
+#define PN544_FW_CMD_RESULT_MEMORY_ERROR 0x20
+#define PN544_FW_CMD_RESULT_CHUNK_OK 0x21
#define PN544_FW_CMD_RESULT_WRITE_FAILED 0x74
+#define PN544_FW_CMD_RESULT_COMMAND_REJECTED 0xE0
+#define PN544_FW_CMD_RESULT_CHUNK_ERROR 0xE6
#define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
@@ -104,11 +133,17 @@ struct pn544_i2c_fw_blob {
#define PN544_FW_I2C_WRITE_DATA_MAX_LEN MIN((PN544_FW_I2C_MAX_PAYLOAD -\
PN544_FW_I2C_WRITE_FRAME_HEADER_LEN),\
PN544_FW_WRITE_BUFFER_MAX_LEN)
+#define PN544_FW_SECURE_CHUNK_WRITE_HEADER_LEN 3
+#define PN544_FW_SECURE_CHUNK_WRITE_DATA_MAX_LEN (PN544_FW_I2C_MAX_PAYLOAD -\
+ PN544_FW_SECURE_CHUNK_WRITE_HEADER_LEN)
+#define PN544_FW_SECURE_FRAME_HEADER_LEN 3
+#define PN544_FW_SECURE_BLOB_HEADER_LEN 8
#define FW_WORK_STATE_IDLE 1
#define FW_WORK_STATE_START 2
#define FW_WORK_STATE_WAIT_WRITE_ANSWER 3
#define FW_WORK_STATE_WAIT_CHECK_ANSWER 4
+#define FW_WORK_STATE_WAIT_SECURE_WRITE_ANSWER 5
struct pn544_i2c_phy {
struct i2c_client *i2c_dev;
@@ -119,6 +154,8 @@ struct pn544_i2c_phy {
unsigned int gpio_fw;
unsigned int en_polarity;
+ u8 hw_variant;
+
struct work_struct fw_work;
int fw_work_state;
char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
@@ -127,6 +164,8 @@ struct pn544_i2c_phy {
size_t fw_blob_size;
const u8 *fw_blob_data;
size_t fw_written;
+ size_t fw_size;
+
int fw_cmd_result;
int powered;
@@ -390,6 +429,8 @@ static int pn544_hci_i2c_fw_read_status(struct pn544_i2c_phy *phy)
switch (response.status) {
case 0:
return 0;
+ case PN544_FW_CMD_RESULT_CHUNK_OK:
+ return response.status;
case PN544_FW_CMD_RESULT_TIMEOUT:
return -ETIMEDOUT;
case PN544_FW_CMD_RESULT_BAD_CRC:
@@ -400,9 +441,20 @@ static int pn544_hci_i2c_fw_read_status(struct pn544_i2c_phy *phy)
return -EPROTO;
case PN544_FW_CMD_RESULT_INVALID_PARAMETER:
return -EINVAL;
+ case PN544_FW_CMD_RESULT_UNSUPPORTED_COMMAND:
+ return -ENOTSUPP;
case PN544_FW_CMD_RESULT_INVALID_LENGTH:
return -EBADMSG;
+ case PN544_FW_CMD_RESULT_CRYPTOGRAPHIC_ERROR:
+ return -ENOKEY;
+ case PN544_FW_CMD_RESULT_VERSION_CONDITIONS_ERROR:
+ return -EINVAL;
+ case PN544_FW_CMD_RESULT_MEMORY_ERROR:
+ return -ENOMEM;
+ case PN544_FW_CMD_RESULT_COMMAND_REJECTED:
+ return -EACCES;
case PN544_FW_CMD_RESULT_WRITE_FAILED:
+ case PN544_FW_CMD_RESULT_CHUNK_ERROR:
return -EIO;
default:
return -EIO;
@@ -469,7 +521,8 @@ static struct nfc_phy_ops i2c_phy_ops = {
.disable = pn544_hci_i2c_disable,
};
-static int pn544_hci_i2c_fw_download(void *phy_id, const char *firmware_name)
+static int pn544_hci_i2c_fw_download(void *phy_id, const char *firmware_name,
+ u8 hw_variant)
{
struct pn544_i2c_phy *phy = phy_id;
@@ -477,6 +530,7 @@ static int pn544_hci_i2c_fw_download(void *phy_id, const char *firmware_name)
strcpy(phy->firmware_name, firmware_name);
+ phy->hw_variant = hw_variant;
phy->fw_work_state = FW_WORK_STATE_START;
schedule_work(&phy->fw_work);
@@ -598,12 +652,93 @@ static int pn544_hci_i2c_fw_write_chunk(struct pn544_i2c_phy *phy)
return 0;
}
+static int pn544_hci_i2c_fw_secure_write_frame_cmd(struct pn544_i2c_phy *phy,
+ const u8 *data, u16 datalen)
+{
+ u8 buf[PN544_FW_I2C_MAX_PAYLOAD];
+ struct pn544_i2c_fw_secure_frame *chunk;
+ int chunklen;
+ int r;
+
+ if (datalen > PN544_FW_SECURE_CHUNK_WRITE_DATA_MAX_LEN)
+ datalen = PN544_FW_SECURE_CHUNK_WRITE_DATA_MAX_LEN;
+
+ chunk = (struct pn544_i2c_fw_secure_frame *) buf;
+
+ chunk->cmd = PN544_FW_CMD_SECURE_CHUNK_WRITE;
+
+ put_unaligned_be16(datalen, &chunk->be_datalen);
+
+ memcpy(chunk->data, data, datalen);
+
+ chunklen = sizeof(chunk->cmd) + sizeof(chunk->be_datalen) + datalen;
+
+ r = i2c_master_send(phy->i2c_dev, buf, chunklen);
+
+ if (r == chunklen)
+ return datalen;
+ else if (r < 0)
+ return r;
+ else
+ return -EIO;
+
+}
+
+static int pn544_hci_i2c_fw_secure_write_frame(struct pn544_i2c_phy *phy)
+{
+ struct pn544_i2c_fw_secure_frame *framep;
+ int r;
+
+ framep = (struct pn544_i2c_fw_secure_frame *) phy->fw_blob_data;
+ if (phy->fw_written == 0)
+ phy->fw_blob_size = get_unaligned_be16(&framep->be_datalen)
+ + PN544_FW_SECURE_FRAME_HEADER_LEN;
+
+ /* Only secure write command can be chunked*/
+ if (phy->fw_blob_size > PN544_FW_I2C_MAX_PAYLOAD &&
+ framep->cmd != PN544_FW_CMD_SECURE_WRITE)
+ return -EINVAL;
+
+ /* The firmware also have other commands, we just send them directly */
+ if (phy->fw_blob_size < PN544_FW_I2C_MAX_PAYLOAD) {
+ r = i2c_master_send(phy->i2c_dev,
+ (const char *) phy->fw_blob_data, phy->fw_blob_size);
+
+ if (r == phy->fw_blob_size)
+ goto exit;
+ else if (r < 0)
+ return r;
+ else
+ return -EIO;
+ }
+
+ r = pn544_hci_i2c_fw_secure_write_frame_cmd(phy,
+ phy->fw_blob_data + phy->fw_written,
+ phy->fw_blob_size - phy->fw_written);
+ if (r < 0)
+ return r;
+
+exit:
+ phy->fw_written += r;
+ phy->fw_work_state = FW_WORK_STATE_WAIT_SECURE_WRITE_ANSWER;
+
+ /* SW reset command will not trig any response from PN544 */
+ if (framep->cmd == PN544_FW_CMD_RESET) {
+ pn544_hci_i2c_enable_mode(phy, PN544_FW_MODE);
+ phy->fw_cmd_result = 0;
+ schedule_work(&phy->fw_work);
+ }
+
+ return 0;
+}
+
static void pn544_hci_i2c_fw_work(struct work_struct *work)
{
struct pn544_i2c_phy *phy = container_of(work, struct pn544_i2c_phy,
fw_work);
int r;
struct pn544_i2c_fw_blob *blob;
+ struct pn544_i2c_fw_secure_blob *secure_blob;
switch (phy->fw_work_state) {
case FW_WORK_STATE_START:
@@ -614,13 +749,29 @@ static void pn544_hci_i2c_fw_work(struct work_struct *work)
if (r < 0)
goto exit_state_start;
- blob = (struct pn544_i2c_fw_blob *) phy->fw->data;
- phy->fw_blob_size = get_unaligned_be32(&blob->be_size);
- phy->fw_blob_dest_addr = get_unaligned_be32(&blob->be_destaddr);
- phy->fw_blob_data = blob->data;
-
phy->fw_written = 0;
- r = pn544_hci_i2c_fw_write_chunk(phy);
+
+ switch (phy->hw_variant) {
+ case PN544_HW_VARIANT_C2:
+ blob = (struct pn544_i2c_fw_blob *) phy->fw->data;
+ phy->fw_blob_size = get_unaligned_be32(&blob->be_size);
+ phy->fw_blob_dest_addr = get_unaligned_be32(
+ &blob->be_destaddr);
+ phy->fw_blob_data = blob->data;
+
+ r = pn544_hci_i2c_fw_write_chunk(phy);
+ break;
+ case PN544_HW_VARIANT_C3:
+ secure_blob = (struct pn544_i2c_fw_secure_blob *)
+ phy->fw->data;
+ phy->fw_blob_data = secure_blob->data;
+ phy->fw_size = phy->fw->size;
+ r = pn544_hci_i2c_fw_secure_write_frame(phy);
+ break;
+ default:
+ r = -ENOTSUPP;
+ break;
+ }
exit_state_start:
if (r < 0)
@@ -672,6 +823,35 @@ exit_state_wait_check_answer:
pn544_hci_i2c_fw_work_complete(phy, r);
break;
+ case FW_WORK_STATE_WAIT_SECURE_WRITE_ANSWER:
+ r = phy->fw_cmd_result;
+ if (r < 0)
+ goto exit_state_wait_secure_write_answer;
+
+ if (r == PN544_FW_CMD_RESULT_CHUNK_OK) {
+ r = pn544_hci_i2c_fw_secure_write_frame(phy);
+ goto exit_state_wait_secure_write_answer;
+ }
+
+ if (phy->fw_written == phy->fw_blob_size) {
+ secure_blob = (struct pn544_i2c_fw_secure_blob *)
+ (phy->fw_blob_data + phy->fw_blob_size);
+ phy->fw_size -= phy->fw_blob_size +
+ PN544_FW_SECURE_BLOB_HEADER_LEN;
+ if (phy->fw_size >= PN544_FW_SECURE_BLOB_HEADER_LEN
+ + PN544_FW_SECURE_FRAME_HEADER_LEN) {
+ phy->fw_blob_data = secure_blob->data;
+
+ phy->fw_written = 0;
+ r = pn544_hci_i2c_fw_secure_write_frame(phy);
+ }
+ }
+
+exit_state_wait_secure_write_answer:
+ if (r < 0 || phy->fw_size == 0)
+ pn544_hci_i2c_fw_work_complete(phy, r);
+ break;
+
default:
break;
}
diff --git a/drivers/nfc/pn544/pn544.c b/drivers/nfc/pn544/pn544.c
index 3df4a109cfad..9c8051d20cea 100644
--- a/drivers/nfc/pn544/pn544.c
+++ b/drivers/nfc/pn544/pn544.c
@@ -786,7 +786,7 @@ static int pn544_hci_fw_download(struct nfc_hci_dev *hdev,
if (info->fw_download == NULL)
return -ENOTSUPP;
- return info->fw_download(info->phy_id, firmware_name);
+ return info->fw_download(info->phy_id, firmware_name, hdev->sw_romlib);
}
static int pn544_hci_discover_se(struct nfc_hci_dev *hdev)
diff --git a/drivers/nfc/pn544/pn544.h b/drivers/nfc/pn544/pn544.h
index 491bf45da358..2aa9233e8086 100644
--- a/drivers/nfc/pn544/pn544.h
+++ b/drivers/nfc/pn544/pn544.h
@@ -25,7 +25,8 @@
#define PN544_HCI_MODE 0
#define PN544_FW_MODE 1
-typedef int (*fw_download_t)(void *context, const char *firmware_name);
+typedef int (*fw_download_t)(void *context, const char *firmware_name,
+ u8 hw_variant);
int pn544_hci_probe(void *phy_id, struct nfc_phy_ops *phy_ops, char *llc_name,
int phy_headroom, int phy_tailroom, int phy_payload,
diff --git a/drivers/nfc/port100.c b/drivers/nfc/port100.c
index a8555f81cbba..b7a372af5eb7 100644
--- a/drivers/nfc/port100.c
+++ b/drivers/nfc/port100.c
@@ -27,7 +27,8 @@
#define PORT100_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
NFC_PROTO_MIFARE_MASK | \
NFC_PROTO_FELICA_MASK | \
- NFC_PROTO_NFC_DEP_MASK)
+ NFC_PROTO_NFC_DEP_MASK | \
+ NFC_PROTO_ISO14443_MASK)
#define PORT100_CAPABILITIES (NFC_DIGITAL_DRV_CAPS_IN_CRC | \
NFC_DIGITAL_DRV_CAPS_TG_CRC)
@@ -139,6 +140,8 @@ static const struct port100_in_rf_setting in_rf_settings[] = {
.in_recv_set_number = 15,
.in_recv_comm_type = PORT100_COMM_TYPE_IN_106A,
},
+ /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */
+ [NFC_DIGITAL_RF_TECH_LAST] = { 0 },
};
/**
@@ -174,6 +177,9 @@ static const struct port100_tg_rf_setting tg_rf_settings[] = {
.tg_set_number = 8,
.tg_comm_type = PORT100_COMM_TYPE_TG_424F,
},
+ /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */
+ [NFC_DIGITAL_RF_TECH_LAST] = { 0 },
+
};
#define PORT100_IN_PROT_INITIAL_GUARD_TIME 0x00
@@ -293,6 +299,10 @@ in_protocols[][PORT100_IN_MAX_NUM_PROTOCOLS + 1] = {
{ PORT100_IN_PROT_CHECK_CRC, 0 },
{ PORT100_IN_PROT_END, 0 },
},
+ [NFC_DIGITAL_FRAMING_NFCA_T4T] = {
+ /* nfc_digital_framing_nfca_standard_with_crc_a */
+ { PORT100_IN_PROT_END, 0 },
+ },
[NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = {
/* nfc_digital_framing_nfca_standard */
{ PORT100_IN_PROT_END, 0 },
@@ -330,6 +340,10 @@ in_protocols[][PORT100_IN_MAX_NUM_PROTOCOLS + 1] = {
[NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
{ PORT100_IN_PROT_END, 0 },
},
+ /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */
+ [NFC_DIGITAL_FRAMING_LAST] = {
+ { PORT100_IN_PROT_END, 0 },
+ },
};
static struct port100_protocol
@@ -371,6 +385,10 @@ tg_protocols[][PORT100_TG_MAX_NUM_PROTOCOLS + 1] = {
{ PORT100_TG_PROT_RF_OFF, 1 },
{ PORT100_TG_PROT_END, 0 },
},
+ /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */
+ [NFC_DIGITAL_FRAMING_LAST] = {
+ { PORT100_TG_PROT_END, 0 },
+ },
};
struct port100 {
@@ -1356,10 +1374,7 @@ static struct nfc_digital_ops port100_digital_ops = {
};
static const struct usb_device_id port100_table[] = {
- { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
- .idVendor = SONY_VENDOR_ID,
- .idProduct = RCS380_PRODUCT_ID,
- },
+ { USB_DEVICE(SONY_VENDOR_ID, RCS380_PRODUCT_ID), },
{ }
};
MODULE_DEVICE_TABLE(usb, port100_table);
diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c
new file mode 100644
index 000000000000..d9babe986473
--- /dev/null
+++ b/drivers/nfc/trf7970a.c
@@ -0,0 +1,1370 @@
+/*
+ * TI TRF7970a RFID/NFC Transceiver Driver
+ *
+ * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * Author: Erick Macias <emacias@ti.com>
+ * Author: Felipe Balbi <balbi@ti.com>
+ * Author: Mark A. Greer <mgreer@animalcreek.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 of
+ * the License as published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/netdevice.h>
+#include <linux/interrupt.h>
+#include <linux/nfc.h>
+#include <linux/skbuff.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/spi/spi.h>
+#include <linux/regulator/consumer.h>
+
+#include <net/nfc/nfc.h>
+#include <net/nfc/digital.h>
+
+/* There are 3 ways the host can communicate with the trf7970a:
+ * parallel mode, SPI with Slave Select (SS) mode, and SPI without
+ * SS mode. The driver only supports the two SPI modes.
+ *
+ * The trf7970a is very timing sensitive and the VIN, EN2, and EN
+ * pins must asserted in that order and with specific delays in between.
+ * The delays used in the driver were provided by TI and have been
+ * confirmed to work with this driver.
+ *
+ * Timeouts are implemented using the delayed workqueue kernel facility.
+ * Timeouts are required so things don't hang when there is no response
+ * from the trf7970a (or tag). Using this mechanism creates a race with
+ * interrupts, however. That is, an interrupt and a timeout could occur
+ * closely enough together that one is blocked by the mutex while the other
+ * executes. When the timeout handler executes first and blocks the
+ * interrupt handler, it will eventually set the state to IDLE so the
+ * interrupt handler will check the state and exit with no harm done.
+ * When the interrupt handler executes first and blocks the timeout handler,
+ * the cancel_delayed_work() call will know that it didn't cancel the
+ * work item (i.e., timeout) and will return zero. That return code is
+ * used by the timer handler to indicate that it should ignore the timeout
+ * once its unblocked.
+ *
+ * Aborting an active command isn't as simple as it seems because the only
+ * way to abort a command that's already been sent to the tag is so turn
+ * off power to the tag. If we do that, though, we'd have to go through
+ * the entire anticollision procedure again but the digital layer doesn't
+ * support that. So, if an abort is received before trf7970a_in_send_cmd()
+ * has sent the command to the tag, it simply returns -ECANCELED. If the
+ * command has already been sent to the tag, then the driver continues
+ * normally and recieves the response data (or error) but just before
+ * sending the data upstream, it frees the rx_skb and sends -ECANCELED
+ * upstream instead. If the command failed, that error will be sent
+ * upstream.
+ *
+ * When recieving data from a tag and the interrupt status register has
+ * only the SRX bit set, it means that all of the data has been received
+ * (once what's in the fifo has been read). However, depending on timing
+ * an interrupt status with only the SRX bit set may not be recived. In
+ * those cases, the timeout mechanism is used to wait 5 ms in case more
+ * data arrives. After 5 ms, it is assumed that all of the data has been
+ * received and the accumulated rx data is sent upstream. The
+ * 'TRF7970A_ST_WAIT_FOR_RX_DATA_CONT' state is used for this purpose
+ * (i.e., it indicates that some data has been received but we're not sure
+ * if there is more coming so a timeout in this state means all data has
+ * been received and there isn't an error). The delay is 5 ms since delays
+ * over 2 ms have been observed during testing (a little extra just in case).
+ *
+ * Type 2 write and sector select commands respond with a 4-bit ACK or NACK.
+ * Having only 4 bits in the FIFO won't normally generate an interrupt so
+ * driver enables the '4_bit_RX' bit of the Special Functions register 1
+ * to cause an interrupt in that case. Leaving that bit for a read command
+ * messes up the data returned so it is only enabled when the framing is
+ * 'NFC_DIGITAL_FRAMING_NFCA_T2T' and the command is not a read command.
+ * Unfortunately, that means that the driver has to peek into tx frames
+ * when the framing is 'NFC_DIGITAL_FRAMING_NFCA_T2T'. This is done by
+ * the trf7970a_per_cmd_config() routine.
+ *
+ * ISO/IEC 15693 frames specify whether to use single or double sub-carrier
+ * frequencies and whether to use low or high data rates in the flags byte
+ * of the frame. This means that the driver has to peek at all 15693 frames
+ * to determine what speed to set the communication to. In addition, write
+ * and lock commands use the OPTION flag to indicate that an EOF must be
+ * sent to the tag before it will send its response. So the driver has to
+ * examine all frames for that reason too.
+ *
+ * It is unclear how long to wait before sending the EOF. According to the
+ * Note under Table 1-1 in section 1.6 of
+ * http://www.ti.com/lit/ug/scbu011/scbu011.pdf, that wait should be at least
+ * 10 ms for TI Tag-it HF-I tags; however testing has shown that is not long
+ * enough. For this reason, the driver waits 20 ms which seems to work
+ * reliably.
+ */
+
+#define TRF7970A_SUPPORTED_PROTOCOLS \
+ (NFC_PROTO_MIFARE_MASK | NFC_PROTO_ISO14443_MASK | \
+ NFC_PROTO_ISO15693_MASK)
+
+/* TX data must be prefixed with a FIFO reset cmd, a cmd that depends
+ * on what the current framing is, the address of the TX length byte 1
+ * register (0x1d), and the 2 byte length of the data to be transmitted.
+ * That totals 5 bytes.
+ */
+#define TRF7970A_TX_SKB_HEADROOM 5
+
+#define TRF7970A_RX_SKB_ALLOC_SIZE 256
+
+#define TRF7970A_FIFO_SIZE 128
+
+/* TX length is 3 nibbles long ==> 4KB - 1 bytes max */
+#define TRF7970A_TX_MAX (4096 - 1)
+
+#define TRF7970A_WAIT_FOR_RX_DATA_TIMEOUT 5
+#define TRF7970A_WAIT_FOR_FIFO_DRAIN_TIMEOUT 3
+#define TRF7970A_WAIT_TO_ISSUE_ISO15693_EOF 20
+
+/* Quirks */
+/* Erratum: When reading IRQ Status register on trf7970a, we must issue a
+ * read continuous command for IRQ Status and Collision Position registers.
+ */
+#define TRF7970A_QUIRK_IRQ_STATUS_READ_ERRATA BIT(0)
+
+/* Direct commands */
+#define TRF7970A_CMD_IDLE 0x00
+#define TRF7970A_CMD_SOFT_INIT 0x03
+#define TRF7970A_CMD_RF_COLLISION 0x04
+#define TRF7970A_CMD_RF_COLLISION_RESPONSE_N 0x05
+#define TRF7970A_CMD_RF_COLLISION_RESPONSE_0 0x06
+#define TRF7970A_CMD_FIFO_RESET 0x0f
+#define TRF7970A_CMD_TRANSMIT_NO_CRC 0x10
+#define TRF7970A_CMD_TRANSMIT 0x11
+#define TRF7970A_CMD_DELAY_TRANSMIT_NO_CRC 0x12
+#define TRF7970A_CMD_DELAY_TRANSMIT 0x13
+#define TRF7970A_CMD_EOF 0x14
+#define TRF7970A_CMD_CLOSE_SLOT 0x15
+#define TRF7970A_CMD_BLOCK_RX 0x16
+#define TRF7970A_CMD_ENABLE_RX 0x17
+#define TRF7970A_CMD_TEST_EXT_RF 0x18
+#define TRF7970A_CMD_TEST_INT_RF 0x19
+#define TRF7970A_CMD_RX_GAIN_ADJUST 0x1a
+
+/* Bits determining whether its a direct command or register R/W,
+ * whether to use a continuous SPI transaction or not, and the actual
+ * direct cmd opcode or regster address.
+ */
+#define TRF7970A_CMD_BIT_CTRL BIT(7)
+#define TRF7970A_CMD_BIT_RW BIT(6)
+#define TRF7970A_CMD_BIT_CONTINUOUS BIT(5)
+#define TRF7970A_CMD_BIT_OPCODE(opcode) ((opcode) & 0x1f)
+
+/* Registers addresses */
+#define TRF7970A_CHIP_STATUS_CTRL 0x00
+#define TRF7970A_ISO_CTRL 0x01
+#define TRF7970A_ISO14443B_TX_OPTIONS 0x02
+#define TRF7970A_ISO14443A_HIGH_BITRATE_OPTIONS 0x03
+#define TRF7970A_TX_TIMER_SETTING_H_BYTE 0x04
+#define TRF7970A_TX_TIMER_SETTING_L_BYTE 0x05
+#define TRF7970A_TX_PULSE_LENGTH_CTRL 0x06
+#define TRF7970A_RX_NO_RESPONSE_WAIT 0x07
+#define TRF7970A_RX_WAIT_TIME 0x08
+#define TRF7970A_MODULATOR_SYS_CLK_CTRL 0x09
+#define TRF7970A_RX_SPECIAL_SETTINGS 0x0a
+#define TRF7970A_REG_IO_CTRL 0x0b
+#define TRF7970A_IRQ_STATUS 0x0c
+#define TRF7970A_COLLISION_IRQ_MASK 0x0d
+#define TRF7970A_COLLISION_POSITION 0x0e
+#define TRF7970A_RSSI_OSC_STATUS 0x0f
+#define TRF7970A_SPECIAL_FCN_REG1 0x10
+#define TRF7970A_SPECIAL_FCN_REG2 0x11
+#define TRF7970A_RAM1 0x12
+#define TRF7970A_RAM2 0x13
+#define TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS 0x14
+#define TRF7970A_NFC_LOW_FIELD_LEVEL 0x16
+#define TRF7970A_NFCID1 0x17
+#define TRF7970A_NFC_TARGET_LEVEL 0x18
+#define TRF79070A_NFC_TARGET_PROTOCOL 0x19
+#define TRF7970A_TEST_REGISTER1 0x1a
+#define TRF7970A_TEST_REGISTER2 0x1b
+#define TRF7970A_FIFO_STATUS 0x1c
+#define TRF7970A_TX_LENGTH_BYTE1 0x1d
+#define TRF7970A_TX_LENGTH_BYTE2 0x1e
+#define TRF7970A_FIFO_IO_REGISTER 0x1f
+
+/* Chip Status Control Register Bits */
+#define TRF7970A_CHIP_STATUS_VRS5_3 BIT(0)
+#define TRF7970A_CHIP_STATUS_REC_ON BIT(1)
+#define TRF7970A_CHIP_STATUS_AGC_ON BIT(2)
+#define TRF7970A_CHIP_STATUS_PM_ON BIT(3)
+#define TRF7970A_CHIP_STATUS_RF_PWR BIT(4)
+#define TRF7970A_CHIP_STATUS_RF_ON BIT(5)
+#define TRF7970A_CHIP_STATUS_DIRECT BIT(6)
+#define TRF7970A_CHIP_STATUS_STBY BIT(7)
+
+/* ISO Control Register Bits */
+#define TRF7970A_ISO_CTRL_15693_SGL_1OF4_662 0x00
+#define TRF7970A_ISO_CTRL_15693_SGL_1OF256_662 0x01
+#define TRF7970A_ISO_CTRL_15693_SGL_1OF4_2648 0x02
+#define TRF7970A_ISO_CTRL_15693_SGL_1OF256_2648 0x03
+#define TRF7970A_ISO_CTRL_15693_DBL_1OF4_667a 0x04
+#define TRF7970A_ISO_CTRL_15693_DBL_1OF256_667 0x05
+#define TRF7970A_ISO_CTRL_15693_DBL_1OF4_2669 0x06
+#define TRF7970A_ISO_CTRL_15693_DBL_1OF256_2669 0x07
+#define TRF7970A_ISO_CTRL_14443A_106 0x08
+#define TRF7970A_ISO_CTRL_14443A_212 0x09
+#define TRF7970A_ISO_CTRL_14443A_424 0x0a
+#define TRF7970A_ISO_CTRL_14443A_848 0x0b
+#define TRF7970A_ISO_CTRL_14443B_106 0x0c
+#define TRF7970A_ISO_CTRL_14443B_212 0x0d
+#define TRF7970A_ISO_CTRL_14443B_424 0x0e
+#define TRF7970A_ISO_CTRL_14443B_848 0x0f
+#define TRF7970A_ISO_CTRL_FELICA_212 0x1a
+#define TRF7970A_ISO_CTRL_FELICA_424 0x1b
+#define TRF7970A_ISO_CTRL_RFID BIT(5)
+#define TRF7970A_ISO_CTRL_DIR_MODE BIT(6)
+#define TRF7970A_ISO_CTRL_RX_CRC_N BIT(7) /* true == No CRC */
+
+#define TRF7970A_ISO_CTRL_RFID_SPEED_MASK 0x1f
+
+/* Modulator and SYS_CLK Control Register Bits */
+#define TRF7970A_MODULATOR_DEPTH(n) ((n) & 0x7)
+#define TRF7970A_MODULATOR_DEPTH_ASK10 (TRF7970A_MODULATOR_DEPTH(0))
+#define TRF7970A_MODULATOR_DEPTH_OOK (TRF7970A_MODULATOR_DEPTH(1))
+#define TRF7970A_MODULATOR_DEPTH_ASK7 (TRF7970A_MODULATOR_DEPTH(2))
+#define TRF7970A_MODULATOR_DEPTH_ASK8_5 (TRF7970A_MODULATOR_DEPTH(3))
+#define TRF7970A_MODULATOR_DEPTH_ASK13 (TRF7970A_MODULATOR_DEPTH(4))
+#define TRF7970A_MODULATOR_DEPTH_ASK16 (TRF7970A_MODULATOR_DEPTH(5))
+#define TRF7970A_MODULATOR_DEPTH_ASK22 (TRF7970A_MODULATOR_DEPTH(6))
+#define TRF7970A_MODULATOR_DEPTH_ASK30 (TRF7970A_MODULATOR_DEPTH(7))
+#define TRF7970A_MODULATOR_EN_ANA BIT(3)
+#define TRF7970A_MODULATOR_CLK(n) (((n) & 0x3) << 4)
+#define TRF7970A_MODULATOR_CLK_DISABLED (TRF7970A_MODULATOR_CLK(0))
+#define TRF7970A_MODULATOR_CLK_3_6 (TRF7970A_MODULATOR_CLK(1))
+#define TRF7970A_MODULATOR_CLK_6_13 (TRF7970A_MODULATOR_CLK(2))
+#define TRF7970A_MODULATOR_CLK_13_27 (TRF7970A_MODULATOR_CLK(3))
+#define TRF7970A_MODULATOR_EN_OOK BIT(6)
+#define TRF7970A_MODULATOR_27MHZ BIT(7)
+
+/* IRQ Status Register Bits */
+#define TRF7970A_IRQ_STATUS_NORESP BIT(0) /* ISO15693 only */
+#define TRF7970A_IRQ_STATUS_COL BIT(1)
+#define TRF7970A_IRQ_STATUS_FRAMING_EOF_ERROR BIT(2)
+#define TRF7970A_IRQ_STATUS_PARITY_ERROR BIT(3)
+#define TRF7970A_IRQ_STATUS_CRC_ERROR BIT(4)
+#define TRF7970A_IRQ_STATUS_FIFO BIT(5)
+#define TRF7970A_IRQ_STATUS_SRX BIT(6)
+#define TRF7970A_IRQ_STATUS_TX BIT(7)
+
+#define TRF7970A_IRQ_STATUS_ERROR \
+ (TRF7970A_IRQ_STATUS_COL | \
+ TRF7970A_IRQ_STATUS_FRAMING_EOF_ERROR | \
+ TRF7970A_IRQ_STATUS_PARITY_ERROR | \
+ TRF7970A_IRQ_STATUS_CRC_ERROR)
+
+#define TRF7970A_SPECIAL_FCN_REG1_COL_7_6 BIT(0)
+#define TRF7970A_SPECIAL_FCN_REG1_14_ANTICOLL BIT(1)
+#define TRF7970A_SPECIAL_FCN_REG1_4_BIT_RX BIT(2)
+#define TRF7970A_SPECIAL_FCN_REG1_SP_DIR_MODE BIT(3)
+#define TRF7970A_SPECIAL_FCN_REG1_NEXT_SLOT_37US BIT(4)
+#define TRF7970A_SPECIAL_FCN_REG1_PAR43 BIT(5)
+
+#define TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS_WLH_124 (0x0 << 2)
+#define TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS_WLH_120 (0x1 << 2)
+#define TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS_WLH_112 (0x2 << 2)
+#define TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS_WLH_96 (0x3 << 2)
+#define TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS_WLL_4 0x0
+#define TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS_WLL_8 0x1
+#define TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS_WLL_16 0x2
+#define TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS_WLL_32 0x3
+
+#define TRF7970A_FIFO_STATUS_OVERFLOW BIT(7)
+
+/* NFC (ISO/IEC 14443A) Type 2 Tag commands */
+#define NFC_T2T_CMD_READ 0x30
+
+/* ISO 15693 commands codes */
+#define ISO15693_CMD_INVENTORY 0x01
+#define ISO15693_CMD_READ_SINGLE_BLOCK 0x20
+#define ISO15693_CMD_WRITE_SINGLE_BLOCK 0x21
+#define ISO15693_CMD_LOCK_BLOCK 0x22
+#define ISO15693_CMD_READ_MULTIPLE_BLOCK 0x23
+#define ISO15693_CMD_WRITE_MULTIPLE_BLOCK 0x24
+#define ISO15693_CMD_SELECT 0x25
+#define ISO15693_CMD_RESET_TO_READY 0x26
+#define ISO15693_CMD_WRITE_AFI 0x27
+#define ISO15693_CMD_LOCK_AFI 0x28
+#define ISO15693_CMD_WRITE_DSFID 0x29
+#define ISO15693_CMD_LOCK_DSFID 0x2a
+#define ISO15693_CMD_GET_SYSTEM_INFO 0x2b
+#define ISO15693_CMD_GET_MULTIPLE_BLOCK_SECURITY_STATUS 0x2c
+
+/* ISO 15693 request and response flags */
+#define ISO15693_REQ_FLAG_SUB_CARRIER BIT(0)
+#define ISO15693_REQ_FLAG_DATA_RATE BIT(1)
+#define ISO15693_REQ_FLAG_INVENTORY BIT(2)
+#define ISO15693_REQ_FLAG_PROTOCOL_EXT BIT(3)
+#define ISO15693_REQ_FLAG_SELECT BIT(4)
+#define ISO15693_REQ_FLAG_AFI BIT(4)
+#define ISO15693_REQ_FLAG_ADDRESS BIT(5)
+#define ISO15693_REQ_FLAG_NB_SLOTS BIT(5)
+#define ISO15693_REQ_FLAG_OPTION BIT(6)
+
+#define ISO15693_REQ_FLAG_SPEED_MASK \
+ (ISO15693_REQ_FLAG_SUB_CARRIER | ISO15693_REQ_FLAG_DATA_RATE)
+
+enum trf7970a_state {
+ TRF7970A_ST_OFF,
+ TRF7970A_ST_IDLE,
+ TRF7970A_ST_IDLE_RX_BLOCKED,
+ TRF7970A_ST_WAIT_FOR_TX_FIFO,
+ TRF7970A_ST_WAIT_FOR_RX_DATA,
+ TRF7970A_ST_WAIT_FOR_RX_DATA_CONT,
+ TRF7970A_ST_WAIT_TO_ISSUE_EOF,
+ TRF7970A_ST_MAX
+};
+
+struct trf7970a {
+ enum trf7970a_state state;
+ struct device *dev;
+ struct spi_device *spi;
+ struct regulator *regulator;
+ struct nfc_digital_dev *ddev;
+ u32 quirks;
+ bool powering_up;
+ bool aborting;
+ struct sk_buff *tx_skb;
+ struct sk_buff *rx_skb;
+ nfc_digital_cmd_complete_t cb;
+ void *cb_arg;
+ u8 iso_ctrl;
+ u8 special_fcn_reg1;
+ int technology;
+ int framing;
+ u8 tx_cmd;
+ bool issue_eof;
+ int en2_gpio;
+ int en_gpio;
+ struct mutex lock;
+ unsigned int timeout;
+ bool ignore_timeout;
+ struct delayed_work timeout_work;
+};
+
+
+static int trf7970a_cmd(struct trf7970a *trf, u8 opcode)
+{
+ u8 cmd = TRF7970A_CMD_BIT_CTRL | TRF7970A_CMD_BIT_OPCODE(opcode);
+ int ret;
+
+ dev_dbg(trf->dev, "cmd: 0x%x\n", cmd);
+
+ ret = spi_write(trf->spi, &cmd, 1);
+ if (ret)
+ dev_err(trf->dev, "%s - cmd: 0x%x, ret: %d\n", __func__, cmd,
+ ret);
+ return ret;
+}
+
+static int trf7970a_read(struct trf7970a *trf, u8 reg, u8 *val)
+{
+ u8 addr = TRF7970A_CMD_BIT_RW | reg;
+ int ret;
+
+ ret = spi_write_then_read(trf->spi, &addr, 1, val, 1);
+ if (ret)
+ dev_err(trf->dev, "%s - addr: 0x%x, ret: %d\n", __func__, addr,
+ ret);
+
+ dev_dbg(trf->dev, "read(0x%x): 0x%x\n", addr, *val);
+
+ return ret;
+}
+
+static int trf7970a_read_cont(struct trf7970a *trf, u8 reg,
+ u8 *buf, size_t len)
+{
+ u8 addr = reg | TRF7970A_CMD_BIT_RW | TRF7970A_CMD_BIT_CONTINUOUS;
+ int ret;
+
+ dev_dbg(trf->dev, "read_cont(0x%x, %zd)\n", addr, len);
+
+ ret = spi_write_then_read(trf->spi, &addr, 1, buf, len);
+ if (ret)
+ dev_err(trf->dev, "%s - addr: 0x%x, ret: %d\n", __func__, addr,
+ ret);
+ return ret;
+}
+
+static int trf7970a_write(struct trf7970a *trf, u8 reg, u8 val)
+{
+ u8 buf[2] = { reg, val };
+ int ret;
+
+ dev_dbg(trf->dev, "write(0x%x): 0x%x\n", reg, val);
+
+ ret = spi_write(trf->spi, buf, 2);
+ if (ret)
+ dev_err(trf->dev, "%s - write: 0x%x 0x%x, ret: %d\n", __func__,
+ buf[0], buf[1], ret);
+
+ return ret;
+}
+
+static int trf7970a_read_irqstatus(struct trf7970a *trf, u8 *status)
+{
+ int ret;
+ u8 buf[2];
+ u8 addr;
+
+ addr = TRF7970A_IRQ_STATUS | TRF7970A_CMD_BIT_RW;
+
+ if (trf->quirks & TRF7970A_QUIRK_IRQ_STATUS_READ_ERRATA) {
+ addr |= TRF7970A_CMD_BIT_CONTINUOUS;
+ ret = spi_write_then_read(trf->spi, &addr, 1, buf, 2);
+ } else {
+ ret = spi_write_then_read(trf->spi, &addr, 1, buf, 1);
+ }
+
+ if (ret)
+ dev_err(trf->dev, "%s - irqstatus: Status read failed: %d\n",
+ __func__, ret);
+ else
+ *status = buf[0];
+
+ return ret;
+}
+
+static void trf7970a_send_upstream(struct trf7970a *trf)
+{
+ u8 rssi;
+
+ dev_kfree_skb_any(trf->tx_skb);
+ trf->tx_skb = NULL;
+
+ if (trf->rx_skb && !IS_ERR(trf->rx_skb) && !trf->aborting)
+ print_hex_dump_debug("trf7970a rx data: ", DUMP_PREFIX_NONE,
+ 16, 1, trf->rx_skb->data, trf->rx_skb->len,
+ false);
+
+ /* According to the manual it is "good form" to reset the fifo and
+ * read the RSSI levels & oscillator status register here. It doesn't
+ * explain why.
+ */
+ trf7970a_cmd(trf, TRF7970A_CMD_FIFO_RESET);
+ trf7970a_read(trf, TRF7970A_RSSI_OSC_STATUS, &rssi);
+
+ trf->state = TRF7970A_ST_IDLE;
+
+ if (trf->aborting) {
+ dev_dbg(trf->dev, "Abort process complete\n");
+
+ if (!IS_ERR(trf->rx_skb)) {
+ kfree_skb(trf->rx_skb);
+ trf->rx_skb = ERR_PTR(-ECANCELED);
+ }
+
+ trf->aborting = false;
+ }
+
+ trf->cb(trf->ddev, trf->cb_arg, trf->rx_skb);
+
+ trf->rx_skb = NULL;
+}
+
+static void trf7970a_send_err_upstream(struct trf7970a *trf, int errno)
+{
+ dev_dbg(trf->dev, "Error - state: %d, errno: %d\n", trf->state, errno);
+
+ kfree_skb(trf->rx_skb);
+ trf->rx_skb = ERR_PTR(errno);
+
+ trf7970a_send_upstream(trf);
+}
+
+static int trf7970a_transmit(struct trf7970a *trf, struct sk_buff *skb,
+ unsigned int len)
+{
+ unsigned int timeout;
+ int ret;
+
+ print_hex_dump_debug("trf7970a tx data: ", DUMP_PREFIX_NONE,
+ 16, 1, skb->data, len, false);
+
+ ret = spi_write(trf->spi, skb->data, len);
+ if (ret) {
+ dev_err(trf->dev, "%s - Can't send tx data: %d\n", __func__,
+ ret);
+ return ret;
+ }
+
+ skb_pull(skb, len);
+
+ if (skb->len > 0) {
+ trf->state = TRF7970A_ST_WAIT_FOR_TX_FIFO;
+ timeout = TRF7970A_WAIT_FOR_FIFO_DRAIN_TIMEOUT;
+ } else {
+ if (trf->issue_eof) {
+ trf->state = TRF7970A_ST_WAIT_TO_ISSUE_EOF;
+ timeout = TRF7970A_WAIT_TO_ISSUE_ISO15693_EOF;
+ } else {
+ trf->state = TRF7970A_ST_WAIT_FOR_RX_DATA;
+ timeout = trf->timeout;
+ }
+ }
+
+ dev_dbg(trf->dev, "Setting timeout for %d ms, state: %d\n", timeout,
+ trf->state);
+
+ schedule_delayed_work(&trf->timeout_work, msecs_to_jiffies(timeout));
+
+ return 0;
+}
+
+static void trf7970a_fill_fifo(struct trf7970a *trf)
+{
+ struct sk_buff *skb = trf->tx_skb;
+ unsigned int len;
+ int ret;
+ u8 fifo_bytes;
+
+ ret = trf7970a_read(trf, TRF7970A_FIFO_STATUS, &fifo_bytes);
+ if (ret) {
+ trf7970a_send_err_upstream(trf, ret);
+ return;
+ }
+
+ dev_dbg(trf->dev, "Filling FIFO - fifo_bytes: 0x%x\n", fifo_bytes);
+
+ if (fifo_bytes & TRF7970A_FIFO_STATUS_OVERFLOW) {
+ dev_err(trf->dev, "%s - fifo overflow: 0x%x\n", __func__,
+ fifo_bytes);
+ trf7970a_send_err_upstream(trf, -EIO);
+ return;
+ }
+
+ /* Calculate how much more data can be written to the fifo */
+ len = TRF7970A_FIFO_SIZE - fifo_bytes;
+ len = min(skb->len, len);
+
+ ret = trf7970a_transmit(trf, skb, len);
+ if (ret)
+ trf7970a_send_err_upstream(trf, ret);
+}
+
+static void trf7970a_drain_fifo(struct trf7970a *trf, u8 status)
+{
+ struct sk_buff *skb = trf->rx_skb;
+ int ret;
+ u8 fifo_bytes;
+
+ if (status & TRF7970A_IRQ_STATUS_ERROR) {
+ trf7970a_send_err_upstream(trf, -EIO);
+ return;
+ }
+
+ ret = trf7970a_read(trf, TRF7970A_FIFO_STATUS, &fifo_bytes);
+ if (ret) {
+ trf7970a_send_err_upstream(trf, ret);
+ return;
+ }
+
+ dev_dbg(trf->dev, "Draining FIFO - fifo_bytes: 0x%x\n", fifo_bytes);
+
+ if (!fifo_bytes)
+ goto no_rx_data;
+
+ if (fifo_bytes & TRF7970A_FIFO_STATUS_OVERFLOW) {
+ dev_err(trf->dev, "%s - fifo overflow: 0x%x\n", __func__,
+ fifo_bytes);
+ trf7970a_send_err_upstream(trf, -EIO);
+ return;
+ }
+
+ if (fifo_bytes > skb_tailroom(skb)) {
+ skb = skb_copy_expand(skb, skb_headroom(skb),
+ max_t(int, fifo_bytes,
+ TRF7970A_RX_SKB_ALLOC_SIZE),
+ GFP_KERNEL);
+ if (!skb) {
+ trf7970a_send_err_upstream(trf, -ENOMEM);
+ return;
+ }
+
+ kfree_skb(trf->rx_skb);
+ trf->rx_skb = skb;
+ }
+
+ ret = trf7970a_read_cont(trf, TRF7970A_FIFO_IO_REGISTER,
+ skb_put(skb, fifo_bytes), fifo_bytes);
+ if (ret) {
+ trf7970a_send_err_upstream(trf, ret);
+ return;
+ }
+
+ /* If received Type 2 ACK/NACK, shift right 4 bits and pass up */
+ if ((trf->framing == NFC_DIGITAL_FRAMING_NFCA_T2T) && (skb->len == 1) &&
+ (trf->special_fcn_reg1 ==
+ TRF7970A_SPECIAL_FCN_REG1_4_BIT_RX)) {
+ skb->data[0] >>= 4;
+ status = TRF7970A_IRQ_STATUS_SRX;
+ } else {
+ trf->state = TRF7970A_ST_WAIT_FOR_RX_DATA_CONT;
+ }
+
+no_rx_data:
+ if (status == TRF7970A_IRQ_STATUS_SRX) { /* Receive complete */
+ trf7970a_send_upstream(trf);
+ return;
+ }
+
+ dev_dbg(trf->dev, "Setting timeout for %d ms\n",
+ TRF7970A_WAIT_FOR_RX_DATA_TIMEOUT);
+
+ schedule_delayed_work(&trf->timeout_work,
+ msecs_to_jiffies(TRF7970A_WAIT_FOR_RX_DATA_TIMEOUT));
+}
+
+static irqreturn_t trf7970a_irq(int irq, void *dev_id)
+{
+ struct trf7970a *trf = dev_id;
+ int ret;
+ u8 status;
+
+ mutex_lock(&trf->lock);
+
+ if (trf->state == TRF7970A_ST_OFF) {
+ mutex_unlock(&trf->lock);
+ return IRQ_NONE;
+ }
+
+ ret = trf7970a_read_irqstatus(trf, &status);
+ if (ret) {
+ mutex_unlock(&trf->lock);
+ return IRQ_NONE;
+ }
+
+ dev_dbg(trf->dev, "IRQ - state: %d, status: 0x%x\n", trf->state,
+ status);
+
+ if (!status) {
+ mutex_unlock(&trf->lock);
+ return IRQ_NONE;
+ }
+
+ switch (trf->state) {
+ case TRF7970A_ST_IDLE:
+ case TRF7970A_ST_IDLE_RX_BLOCKED:
+ /* If getting interrupts caused by RF noise, turn off the
+ * receiver to avoid unnecessary interrupts. It will be
+ * turned back on in trf7970a_in_send_cmd() when the next
+ * command is issued.
+ */
+ if (status & TRF7970A_IRQ_STATUS_ERROR) {
+ trf7970a_cmd(trf, TRF7970A_CMD_BLOCK_RX);
+ trf->state = TRF7970A_ST_IDLE_RX_BLOCKED;
+ }
+
+ trf7970a_cmd(trf, TRF7970A_CMD_FIFO_RESET);
+ break;
+ case TRF7970A_ST_WAIT_FOR_TX_FIFO:
+ if (status & TRF7970A_IRQ_STATUS_TX) {
+ trf->ignore_timeout =
+ !cancel_delayed_work(&trf->timeout_work);
+ trf7970a_fill_fifo(trf);
+ } else {
+ trf7970a_send_err_upstream(trf, -EIO);
+ }
+ break;
+ case TRF7970A_ST_WAIT_FOR_RX_DATA:
+ case TRF7970A_ST_WAIT_FOR_RX_DATA_CONT:
+ if (status & TRF7970A_IRQ_STATUS_SRX) {
+ trf->ignore_timeout =
+ !cancel_delayed_work(&trf->timeout_work);
+ trf7970a_drain_fifo(trf, status);
+ } else if (!(status & TRF7970A_IRQ_STATUS_TX)) {
+ trf7970a_send_err_upstream(trf, -EIO);
+ }
+ break;
+ case TRF7970A_ST_WAIT_TO_ISSUE_EOF:
+ if (status != TRF7970A_IRQ_STATUS_TX)
+ trf7970a_send_err_upstream(trf, -EIO);
+ break;
+ default:
+ dev_err(trf->dev, "%s - Driver in invalid state: %d\n",
+ __func__, trf->state);
+ }
+
+ mutex_unlock(&trf->lock);
+ return IRQ_HANDLED;
+}
+
+static void trf7970a_issue_eof(struct trf7970a *trf)
+{
+ int ret;
+
+ dev_dbg(trf->dev, "Issuing EOF\n");
+
+ ret = trf7970a_cmd(trf, TRF7970A_CMD_FIFO_RESET);
+ if (ret)
+ trf7970a_send_err_upstream(trf, ret);
+
+ ret = trf7970a_cmd(trf, TRF7970A_CMD_EOF);
+ if (ret)
+ trf7970a_send_err_upstream(trf, ret);
+
+ trf->state = TRF7970A_ST_WAIT_FOR_RX_DATA;
+
+ dev_dbg(trf->dev, "Setting timeout for %d ms, state: %d\n",
+ trf->timeout, trf->state);
+
+ schedule_delayed_work(&trf->timeout_work,
+ msecs_to_jiffies(trf->timeout));
+}
+
+static void trf7970a_timeout_work_handler(struct work_struct *work)
+{
+ struct trf7970a *trf = container_of(work, struct trf7970a,
+ timeout_work.work);
+
+ dev_dbg(trf->dev, "Timeout - state: %d, ignore_timeout: %d\n",
+ trf->state, trf->ignore_timeout);
+
+ mutex_lock(&trf->lock);
+
+ if (trf->ignore_timeout)
+ trf->ignore_timeout = false;
+ else if (trf->state == TRF7970A_ST_WAIT_FOR_RX_DATA_CONT)
+ trf7970a_send_upstream(trf); /* No more rx data so send up */
+ else if (trf->state == TRF7970A_ST_WAIT_TO_ISSUE_EOF)
+ trf7970a_issue_eof(trf);
+ else
+ trf7970a_send_err_upstream(trf, -ETIMEDOUT);
+
+ mutex_unlock(&trf->lock);
+}
+
+static int trf7970a_init(struct trf7970a *trf)
+{
+ int ret;
+
+ dev_dbg(trf->dev, "Initializing device - state: %d\n", trf->state);
+
+ ret = trf7970a_cmd(trf, TRF7970A_CMD_SOFT_INIT);
+ if (ret)
+ goto err_out;
+
+ ret = trf7970a_cmd(trf, TRF7970A_CMD_IDLE);
+ if (ret)
+ goto err_out;
+
+ ret = trf7970a_write(trf, TRF7970A_MODULATOR_SYS_CLK_CTRL,
+ TRF7970A_MODULATOR_DEPTH_OOK);
+ if (ret)
+ goto err_out;
+
+ ret = trf7970a_write(trf, TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS,
+ TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS_WLH_96 |
+ TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS_WLL_32);
+ if (ret)
+ goto err_out;
+
+ ret = trf7970a_write(trf, TRF7970A_SPECIAL_FCN_REG1, 0);
+ if (ret)
+ goto err_out;
+
+ trf->special_fcn_reg1 = 0;
+
+ ret = trf7970a_write(trf, TRF7970A_CHIP_STATUS_CTRL,
+ TRF7970A_CHIP_STATUS_RF_ON |
+ TRF7970A_CHIP_STATUS_VRS5_3);
+ if (ret)
+ goto err_out;
+
+ return 0;
+
+err_out:
+ dev_dbg(trf->dev, "Couldn't init device: %d\n", ret);
+ return ret;
+}
+
+static void trf7970a_switch_rf_off(struct trf7970a *trf)
+{
+ dev_dbg(trf->dev, "Switching rf off\n");
+
+ gpio_set_value(trf->en_gpio, 0);
+ gpio_set_value(trf->en2_gpio, 0);
+
+ trf->aborting = false;
+ trf->state = TRF7970A_ST_OFF;
+}
+
+static int trf7970a_switch_rf_on(struct trf7970a *trf)
+{
+ unsigned long delay;
+ int ret;
+
+ dev_dbg(trf->dev, "Switching rf on\n");
+
+ if (trf->powering_up)
+ usleep_range(5000, 6000);
+
+ gpio_set_value(trf->en2_gpio, 1);
+ usleep_range(1000, 2000);
+ gpio_set_value(trf->en_gpio, 1);
+
+ /* The delay between enabling the trf7970a and issuing the first
+ * command is significantly longer the very first time after powering
+ * up. Make sure the longer delay is only done the first time.
+ */
+ if (trf->powering_up) {
+ delay = 20000;
+ trf->powering_up = false;
+ } else {
+ delay = 5000;
+ }
+
+ usleep_range(delay, delay + 1000);
+
+ ret = trf7970a_init(trf);
+ if (ret)
+ trf7970a_switch_rf_off(trf);
+ else
+ trf->state = TRF7970A_ST_IDLE;
+
+ return ret;
+}
+
+static int trf7970a_switch_rf(struct nfc_digital_dev *ddev, bool on)
+{
+ struct trf7970a *trf = nfc_digital_get_drvdata(ddev);
+ int ret = 0;
+
+ dev_dbg(trf->dev, "Switching RF - state: %d, on: %d\n", trf->state, on);
+
+ mutex_lock(&trf->lock);
+
+ if (on) {
+ switch (trf->state) {
+ case TRF7970A_ST_OFF:
+ ret = trf7970a_switch_rf_on(trf);
+ break;
+ case TRF7970A_ST_IDLE:
+ case TRF7970A_ST_IDLE_RX_BLOCKED:
+ break;
+ default:
+ dev_err(trf->dev, "%s - Invalid request: %d %d\n",
+ __func__, trf->state, on);
+ trf7970a_switch_rf_off(trf);
+ }
+ } else {
+ switch (trf->state) {
+ case TRF7970A_ST_OFF:
+ break;
+ default:
+ dev_err(trf->dev, "%s - Invalid request: %d %d\n",
+ __func__, trf->state, on);
+ /* FALLTHROUGH */
+ case TRF7970A_ST_IDLE:
+ case TRF7970A_ST_IDLE_RX_BLOCKED:
+ trf7970a_switch_rf_off(trf);
+ }
+ }
+
+ mutex_unlock(&trf->lock);
+ return ret;
+}
+
+static int trf7970a_config_rf_tech(struct trf7970a *trf, int tech)
+{
+ int ret = 0;
+
+ dev_dbg(trf->dev, "rf technology: %d\n", tech);
+
+ switch (tech) {
+ case NFC_DIGITAL_RF_TECH_106A:
+ trf->iso_ctrl = TRF7970A_ISO_CTRL_14443A_106;
+ break;
+ case NFC_DIGITAL_RF_TECH_ISO15693:
+ trf->iso_ctrl = TRF7970A_ISO_CTRL_15693_SGL_1OF4_2648;
+ break;
+ default:
+ dev_dbg(trf->dev, "Unsupported rf technology: %d\n", tech);
+ return -EINVAL;
+ }
+
+ trf->technology = tech;
+
+ return ret;
+}
+
+static int trf7970a_config_framing(struct trf7970a *trf, int framing)
+{
+ dev_dbg(trf->dev, "framing: %d\n", framing);
+
+ switch (framing) {
+ case NFC_DIGITAL_FRAMING_NFCA_SHORT:
+ case NFC_DIGITAL_FRAMING_NFCA_STANDARD:
+ trf->tx_cmd = TRF7970A_CMD_TRANSMIT_NO_CRC;
+ trf->iso_ctrl |= TRF7970A_ISO_CTRL_RX_CRC_N;
+ break;
+ case NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A:
+ case NFC_DIGITAL_FRAMING_NFCA_T4T:
+ case NFC_DIGITAL_FRAMING_ISO15693_INVENTORY:
+ case NFC_DIGITAL_FRAMING_ISO15693_T5T:
+ trf->tx_cmd = TRF7970A_CMD_TRANSMIT;
+ trf->iso_ctrl &= ~TRF7970A_ISO_CTRL_RX_CRC_N;
+ break;
+ case NFC_DIGITAL_FRAMING_NFCA_T2T:
+ trf->tx_cmd = TRF7970A_CMD_TRANSMIT;
+ trf->iso_ctrl |= TRF7970A_ISO_CTRL_RX_CRC_N;
+ break;
+ default:
+ dev_dbg(trf->dev, "Unsupported Framing: %d\n", framing);
+ return -EINVAL;
+ }
+
+ trf->framing = framing;
+
+ return trf7970a_write(trf, TRF7970A_ISO_CTRL, trf->iso_ctrl);
+}
+
+static int trf7970a_in_configure_hw(struct nfc_digital_dev *ddev, int type,
+ int param)
+{
+ struct trf7970a *trf = nfc_digital_get_drvdata(ddev);
+ int ret = 0;
+
+ dev_dbg(trf->dev, "Configure hw - type: %d, param: %d\n", type, param);
+
+ mutex_lock(&trf->lock);
+
+ if (trf->state == TRF7970A_ST_OFF) {
+ ret = trf7970a_switch_rf_on(trf);
+ if (ret)
+ goto err_out;
+ }
+
+ switch (type) {
+ case NFC_DIGITAL_CONFIG_RF_TECH:
+ ret = trf7970a_config_rf_tech(trf, param);
+ break;
+ case NFC_DIGITAL_CONFIG_FRAMING:
+ ret = trf7970a_config_framing(trf, param);
+ break;
+ default:
+ dev_dbg(trf->dev, "Unknown type: %d\n", type);
+ ret = -EINVAL;
+ }
+
+err_out:
+ mutex_unlock(&trf->lock);
+ return ret;
+}
+
+static int trf7970a_is_iso15693_write_or_lock(u8 cmd)
+{
+ switch (cmd) {
+ case ISO15693_CMD_WRITE_SINGLE_BLOCK:
+ case ISO15693_CMD_LOCK_BLOCK:
+ case ISO15693_CMD_WRITE_MULTIPLE_BLOCK:
+ case ISO15693_CMD_WRITE_AFI:
+ case ISO15693_CMD_LOCK_AFI:
+ case ISO15693_CMD_WRITE_DSFID:
+ case ISO15693_CMD_LOCK_DSFID:
+ return 1;
+ break;
+ default:
+ return 0;
+ }
+}
+
+static int trf7970a_per_cmd_config(struct trf7970a *trf, struct sk_buff *skb)
+{
+ u8 *req = skb->data;
+ u8 special_fcn_reg1, iso_ctrl;
+ int ret;
+
+ trf->issue_eof = false;
+
+ /* When issuing Type 2 read command, make sure the '4_bit_RX' bit in
+ * special functions register 1 is cleared; otherwise, its a write or
+ * sector select command and '4_bit_RX' must be set.
+ *
+ * When issuing an ISO 15693 command, inspect the flags byte to see
+ * what speed to use. Also, remember if the OPTION flag is set on
+ * a Type 5 write or lock command so the driver will know that it
+ * has to send an EOF in order to get a response.
+ */
+ if ((trf->technology == NFC_DIGITAL_RF_TECH_106A) &&
+ (trf->framing == NFC_DIGITAL_FRAMING_NFCA_T2T)) {
+ if (req[0] == NFC_T2T_CMD_READ)
+ special_fcn_reg1 = 0;
+ else
+ special_fcn_reg1 = TRF7970A_SPECIAL_FCN_REG1_4_BIT_RX;
+
+ if (special_fcn_reg1 != trf->special_fcn_reg1) {
+ ret = trf7970a_write(trf, TRF7970A_SPECIAL_FCN_REG1,
+ special_fcn_reg1);
+ if (ret)
+ return ret;
+
+ trf->special_fcn_reg1 = special_fcn_reg1;
+ }
+ } else if (trf->technology == NFC_DIGITAL_RF_TECH_ISO15693) {
+ iso_ctrl = trf->iso_ctrl & ~TRF7970A_ISO_CTRL_RFID_SPEED_MASK;
+
+ switch (req[0] & ISO15693_REQ_FLAG_SPEED_MASK) {
+ case 0x00:
+ iso_ctrl |= TRF7970A_ISO_CTRL_15693_SGL_1OF4_662;
+ break;
+ case ISO15693_REQ_FLAG_SUB_CARRIER:
+ iso_ctrl |= TRF7970A_ISO_CTRL_15693_DBL_1OF4_667a;
+ break;
+ case ISO15693_REQ_FLAG_DATA_RATE:
+ iso_ctrl |= TRF7970A_ISO_CTRL_15693_SGL_1OF4_2648;
+ break;
+ case (ISO15693_REQ_FLAG_SUB_CARRIER |
+ ISO15693_REQ_FLAG_DATA_RATE):
+ iso_ctrl |= TRF7970A_ISO_CTRL_15693_DBL_1OF4_2669;
+ break;
+ }
+
+ if (iso_ctrl != trf->iso_ctrl) {
+ ret = trf7970a_write(trf, TRF7970A_ISO_CTRL, iso_ctrl);
+ if (ret)
+ return ret;
+
+ trf->iso_ctrl = iso_ctrl;
+ }
+
+ if ((trf->framing == NFC_DIGITAL_FRAMING_ISO15693_T5T) &&
+ trf7970a_is_iso15693_write_or_lock(req[1]) &&
+ (req[0] & ISO15693_REQ_FLAG_OPTION))
+ trf->issue_eof = true;
+ }
+
+ return 0;
+}
+
+static int trf7970a_in_send_cmd(struct nfc_digital_dev *ddev,
+ struct sk_buff *skb, u16 timeout,
+ nfc_digital_cmd_complete_t cb, void *arg)
+{
+ struct trf7970a *trf = nfc_digital_get_drvdata(ddev);
+ char *prefix;
+ unsigned int len;
+ int ret;
+
+ dev_dbg(trf->dev, "New request - state: %d, timeout: %d ms, len: %d\n",
+ trf->state, timeout, skb->len);
+
+ if (skb->len > TRF7970A_TX_MAX)
+ return -EINVAL;
+
+ mutex_lock(&trf->lock);
+
+ if ((trf->state != TRF7970A_ST_IDLE) &&
+ (trf->state != TRF7970A_ST_IDLE_RX_BLOCKED)) {
+ dev_err(trf->dev, "%s - Bogus state: %d\n", __func__,
+ trf->state);
+ ret = -EIO;
+ goto out_err;
+ }
+
+ if (trf->aborting) {
+ dev_dbg(trf->dev, "Abort process complete\n");
+ trf->aborting = false;
+ ret = -ECANCELED;
+ goto out_err;
+ }
+
+ trf->rx_skb = nfc_alloc_recv_skb(TRF7970A_RX_SKB_ALLOC_SIZE,
+ GFP_KERNEL);
+ if (!trf->rx_skb) {
+ dev_dbg(trf->dev, "Can't alloc rx_skb\n");
+ ret = -ENOMEM;
+ goto out_err;
+ }
+
+ if (trf->state == TRF7970A_ST_IDLE_RX_BLOCKED) {
+ ret = trf7970a_cmd(trf, TRF7970A_CMD_ENABLE_RX);
+ if (ret)
+ goto out_err;
+
+ trf->state = TRF7970A_ST_IDLE;
+ }
+
+ ret = trf7970a_per_cmd_config(trf, skb);
+ if (ret)
+ goto out_err;
+
+ trf->ddev = ddev;
+ trf->tx_skb = skb;
+ trf->cb = cb;
+ trf->cb_arg = arg;
+ trf->timeout = timeout;
+ trf->ignore_timeout = false;
+
+ len = skb->len;
+ prefix = skb_push(skb, TRF7970A_TX_SKB_HEADROOM);
+
+ /* TX data must be prefixed with a FIFO reset cmd, a cmd that depends
+ * on what the current framing is, the address of the TX length byte 1
+ * register (0x1d), and the 2 byte length of the data to be transmitted.
+ */
+ prefix[0] = TRF7970A_CMD_BIT_CTRL |
+ TRF7970A_CMD_BIT_OPCODE(TRF7970A_CMD_FIFO_RESET);
+ prefix[1] = TRF7970A_CMD_BIT_CTRL |
+ TRF7970A_CMD_BIT_OPCODE(trf->tx_cmd);
+ prefix[2] = TRF7970A_CMD_BIT_CONTINUOUS | TRF7970A_TX_LENGTH_BYTE1;
+
+ if (trf->framing == NFC_DIGITAL_FRAMING_NFCA_SHORT) {
+ prefix[3] = 0x00;
+ prefix[4] = 0x0f; /* 7 bits */
+ } else {
+ prefix[3] = (len & 0xf00) >> 4;
+ prefix[3] |= ((len & 0xf0) >> 4);
+ prefix[4] = ((len & 0x0f) << 4);
+ }
+
+ len = min_t(int, skb->len, TRF7970A_FIFO_SIZE);
+
+ usleep_range(1000, 2000);
+
+ ret = trf7970a_transmit(trf, skb, len);
+ if (ret) {
+ kfree_skb(trf->rx_skb);
+ trf->rx_skb = NULL;
+ }
+
+out_err:
+ mutex_unlock(&trf->lock);
+ return ret;
+}
+
+static int trf7970a_tg_configure_hw(struct nfc_digital_dev *ddev,
+ int type, int param)
+{
+ struct trf7970a *trf = nfc_digital_get_drvdata(ddev);
+
+ dev_dbg(trf->dev, "Unsupported interface\n");
+
+ return -EINVAL;
+}
+
+static int trf7970a_tg_send_cmd(struct nfc_digital_dev *ddev,
+ struct sk_buff *skb, u16 timeout,
+ nfc_digital_cmd_complete_t cb, void *arg)
+{
+ struct trf7970a *trf = nfc_digital_get_drvdata(ddev);
+
+ dev_dbg(trf->dev, "Unsupported interface\n");
+
+ return -EINVAL;
+}
+
+static int trf7970a_tg_listen(struct nfc_digital_dev *ddev,
+ u16 timeout, nfc_digital_cmd_complete_t cb, void *arg)
+{
+ struct trf7970a *trf = nfc_digital_get_drvdata(ddev);
+
+ dev_dbg(trf->dev, "Unsupported interface\n");
+
+ return -EINVAL;
+}
+
+static int trf7970a_tg_listen_mdaa(struct nfc_digital_dev *ddev,
+ struct digital_tg_mdaa_params *mdaa_params,
+ u16 timeout, nfc_digital_cmd_complete_t cb, void *arg)
+{
+ struct trf7970a *trf = nfc_digital_get_drvdata(ddev);
+
+ dev_dbg(trf->dev, "Unsupported interface\n");
+
+ return -EINVAL;
+}
+
+static void trf7970a_abort_cmd(struct nfc_digital_dev *ddev)
+{
+ struct trf7970a *trf = nfc_digital_get_drvdata(ddev);
+
+ dev_dbg(trf->dev, "Abort process initiated\n");
+
+ mutex_lock(&trf->lock);
+ trf->aborting = true;
+ mutex_unlock(&trf->lock);
+}
+
+static struct nfc_digital_ops trf7970a_nfc_ops = {
+ .in_configure_hw = trf7970a_in_configure_hw,
+ .in_send_cmd = trf7970a_in_send_cmd,
+ .tg_configure_hw = trf7970a_tg_configure_hw,
+ .tg_send_cmd = trf7970a_tg_send_cmd,
+ .tg_listen = trf7970a_tg_listen,
+ .tg_listen_mdaa = trf7970a_tg_listen_mdaa,
+ .switch_rf = trf7970a_switch_rf,
+ .abort_cmd = trf7970a_abort_cmd,
+};
+
+static int trf7970a_probe(struct spi_device *spi)
+{
+ struct device_node *np = spi->dev.of_node;
+ const struct spi_device_id *id = spi_get_device_id(spi);
+ struct trf7970a *trf;
+ int ret;
+
+ if (!np) {
+ dev_err(&spi->dev, "No Device Tree entry\n");
+ return -EINVAL;
+ }
+
+ trf = devm_kzalloc(&spi->dev, sizeof(*trf), GFP_KERNEL);
+ if (!trf)
+ return -ENOMEM;
+
+ trf->state = TRF7970A_ST_OFF;
+ trf->dev = &spi->dev;
+ trf->spi = spi;
+ trf->quirks = id->driver_data;
+
+ spi->mode = SPI_MODE_1;
+ spi->bits_per_word = 8;
+
+ /* There are two enable pins - both must be present */
+ trf->en_gpio = of_get_named_gpio(np, "ti,enable-gpios", 0);
+ if (!gpio_is_valid(trf->en_gpio)) {
+ dev_err(trf->dev, "No EN GPIO property\n");
+ return trf->en_gpio;
+ }
+
+ ret = devm_gpio_request_one(trf->dev, trf->en_gpio,
+ GPIOF_DIR_OUT | GPIOF_INIT_LOW, "EN");
+ if (ret) {
+ dev_err(trf->dev, "Can't request EN GPIO: %d\n", ret);
+ return ret;
+ }
+
+ trf->en2_gpio = of_get_named_gpio(np, "ti,enable-gpios", 1);
+ if (!gpio_is_valid(trf->en2_gpio)) {
+ dev_err(trf->dev, "No EN2 GPIO property\n");
+ return trf->en2_gpio;
+ }
+
+ ret = devm_gpio_request_one(trf->dev, trf->en2_gpio,
+ GPIOF_DIR_OUT | GPIOF_INIT_LOW, "EN2");
+ if (ret) {
+ dev_err(trf->dev, "Can't request EN2 GPIO: %d\n", ret);
+ return ret;
+ }
+
+ ret = devm_request_threaded_irq(trf->dev, spi->irq, NULL,
+ trf7970a_irq, IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+ "trf7970a", trf);
+ if (ret) {
+ dev_err(trf->dev, "Can't request IRQ#%d: %d\n", spi->irq, ret);
+ return ret;
+ }
+
+ mutex_init(&trf->lock);
+ INIT_DELAYED_WORK(&trf->timeout_work, trf7970a_timeout_work_handler);
+
+ trf->regulator = devm_regulator_get(&spi->dev, "vin");
+ if (IS_ERR(trf->regulator)) {
+ ret = PTR_ERR(trf->regulator);
+ dev_err(trf->dev, "Can't get VIN regulator: %d\n", ret);
+ goto err_destroy_lock;
+ }
+
+ ret = regulator_enable(trf->regulator);
+ if (ret) {
+ dev_err(trf->dev, "Can't enable VIN: %d\n", ret);
+ goto err_destroy_lock;
+ }
+
+ trf->powering_up = true;
+
+ trf->ddev = nfc_digital_allocate_device(&trf7970a_nfc_ops,
+ TRF7970A_SUPPORTED_PROTOCOLS,
+ NFC_DIGITAL_DRV_CAPS_IN_CRC, TRF7970A_TX_SKB_HEADROOM,
+ 0);
+ if (!trf->ddev) {
+ dev_err(trf->dev, "Can't allocate NFC digital device\n");
+ ret = -ENOMEM;
+ goto err_disable_regulator;
+ }
+
+ nfc_digital_set_parent_dev(trf->ddev, trf->dev);
+ nfc_digital_set_drvdata(trf->ddev, trf);
+ spi_set_drvdata(spi, trf);
+
+ ret = nfc_digital_register_device(trf->ddev);
+ if (ret) {
+ dev_err(trf->dev, "Can't register NFC digital device: %d\n",
+ ret);
+ goto err_free_ddev;
+ }
+
+ return 0;
+
+err_free_ddev:
+ nfc_digital_free_device(trf->ddev);
+err_disable_regulator:
+ regulator_disable(trf->regulator);
+err_destroy_lock:
+ mutex_destroy(&trf->lock);
+ return ret;
+}
+
+static int trf7970a_remove(struct spi_device *spi)
+{
+ struct trf7970a *trf = spi_get_drvdata(spi);
+
+ mutex_lock(&trf->lock);
+
+ trf7970a_switch_rf_off(trf);
+ trf7970a_init(trf);
+
+ switch (trf->state) {
+ case TRF7970A_ST_WAIT_FOR_TX_FIFO:
+ case TRF7970A_ST_WAIT_FOR_RX_DATA:
+ case TRF7970A_ST_WAIT_FOR_RX_DATA_CONT:
+ case TRF7970A_ST_WAIT_TO_ISSUE_EOF:
+ trf7970a_send_err_upstream(trf, -ECANCELED);
+ break;
+ default:
+ break;
+ }
+
+ mutex_unlock(&trf->lock);
+
+ nfc_digital_unregister_device(trf->ddev);
+ nfc_digital_free_device(trf->ddev);
+
+ regulator_disable(trf->regulator);
+
+ mutex_destroy(&trf->lock);
+
+ return 0;
+}
+
+static const struct spi_device_id trf7970a_id_table[] = {
+ { "trf7970a", TRF7970A_QUIRK_IRQ_STATUS_READ_ERRATA },
+ { }
+};
+MODULE_DEVICE_TABLE(spi, trf7970a_id_table);
+
+static struct spi_driver trf7970a_spi_driver = {
+ .probe = trf7970a_probe,
+ .remove = trf7970a_remove,
+ .id_table = trf7970a_id_table,
+ .driver = {
+ .name = "trf7970a",
+ .owner = THIS_MODULE,
+ },
+};
+
+module_spi_driver(trf7970a_spi_driver);
+
+MODULE_AUTHOR("Mark A. Greer <mgreer@animalcreek.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("TI trf7970a RFID/NFC Transceiver Driver");
diff --git a/include/net/nfc/digital.h b/include/net/nfc/digital.h
index 81af21e9bcd4..7655cfe27c34 100644
--- a/include/net/nfc/digital.h
+++ b/include/net/nfc/digital.h
@@ -35,6 +35,7 @@ enum {
NFC_DIGITAL_RF_TECH_106A = 0,
NFC_DIGITAL_RF_TECH_212F,
NFC_DIGITAL_RF_TECH_424F,
+ NFC_DIGITAL_RF_TECH_ISO15693,
NFC_DIGITAL_RF_TECH_LAST,
};
@@ -50,6 +51,7 @@ enum {
NFC_DIGITAL_FRAMING_NFCA_T1T,
NFC_DIGITAL_FRAMING_NFCA_T2T,
+ NFC_DIGITAL_FRAMING_NFCA_T4T,
NFC_DIGITAL_FRAMING_NFCA_NFC_DEP,
NFC_DIGITAL_FRAMING_NFCF,
@@ -57,6 +59,9 @@ enum {
NFC_DIGITAL_FRAMING_NFCF_NFC_DEP,
NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED,
+ NFC_DIGITAL_FRAMING_ISO15693_INVENTORY,
+ NFC_DIGITAL_FRAMING_ISO15693_T5T,
+
NFC_DIGITAL_FRAMING_LAST,
};
@@ -204,6 +209,8 @@ struct nfc_digital_dev {
u8 curr_rf_tech;
u8 curr_nfc_dep_pni;
+ u16 target_fsc;
+
int (*skb_check_crc)(struct sk_buff *skb);
void (*skb_add_crc)(struct sk_buff *skb);
};
diff --git a/include/net/nfc/nfc.h b/include/net/nfc/nfc.h
index e80894bca1d0..2e8b40c16274 100644
--- a/include/net/nfc/nfc.h
+++ b/include/net/nfc/nfc.h
@@ -111,6 +111,9 @@ struct nfc_target {
u8 sensf_res[NFC_SENSF_RES_MAXSIZE];
u8 hci_reader_gate;
u8 logical_idx;
+ u8 is_iso15693;
+ u8 iso15693_dsfid;
+ u8 iso15693_uid[NFC_ISO15693_UID_MAXSIZE];
};
/**
diff --git a/include/uapi/linux/nfc.h b/include/uapi/linux/nfc.h
index 6ad6cc03ccd3..9789dc95b6a8 100644
--- a/include/uapi/linux/nfc.h
+++ b/include/uapi/linux/nfc.h
@@ -150,6 +150,8 @@ enum nfc_commands {
* @NFC_ATTR_SE_TYPE: Secure element type (UICC or EMBEDDED)
* @NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS: Firmware download operation status
* @NFC_ATTR_APDU: Secure element APDU
+ * @NFC_ATTR_TARGET_ISO15693_DSFID: ISO 15693 Data Storage Format Identifier
+ * @NFC_ATTR_TARGET_ISO15693_UID: ISO 15693 Unique Identifier
*/
enum nfc_attrs {
NFC_ATTR_UNSPEC,
@@ -178,6 +180,8 @@ enum nfc_attrs {
NFC_ATTR_SE_AID,
NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS,
NFC_ATTR_SE_APDU,
+ NFC_ATTR_TARGET_ISO15693_DSFID,
+ NFC_ATTR_TARGET_ISO15693_UID,
/* private: internal use only */
__NFC_ATTR_AFTER_LAST
};
@@ -200,6 +204,7 @@ enum nfc_sdp_attr {
#define NFC_SENSF_RES_MAXSIZE 18
#define NFC_GB_MAXSIZE 48
#define NFC_FIRMWARE_NAME_MAXSIZE 32
+#define NFC_ISO15693_UID_MAXSIZE 8
/* NFC protocols */
#define NFC_PROTO_JEWEL 1
@@ -208,8 +213,9 @@ enum nfc_sdp_attr {
#define NFC_PROTO_ISO14443 4
#define NFC_PROTO_NFC_DEP 5
#define NFC_PROTO_ISO14443_B 6
+#define NFC_PROTO_ISO15693 7
-#define NFC_PROTO_MAX 7
+#define NFC_PROTO_MAX 8
/* NFC communication modes */
#define NFC_COMM_ACTIVE 0
@@ -227,6 +233,7 @@ enum nfc_sdp_attr {
#define NFC_PROTO_ISO14443_MASK (1 << NFC_PROTO_ISO14443)
#define NFC_PROTO_NFC_DEP_MASK (1 << NFC_PROTO_NFC_DEP)
#define NFC_PROTO_ISO14443_B_MASK (1 << NFC_PROTO_ISO14443_B)
+#define NFC_PROTO_ISO15693_MASK (1 << NFC_PROTO_ISO15693)
/* NFC Secure Elements */
#define NFC_SE_UICC 0x1
diff --git a/net/nfc/core.c b/net/nfc/core.c
index ca1e65f4b133..819b87702b70 100644
--- a/net/nfc/core.c
+++ b/net/nfc/core.c
@@ -280,9 +280,6 @@ static struct nfc_target *nfc_find_target(struct nfc_dev *dev, u32 target_idx)
{
int i;
- if (dev->n_targets == 0)
- return NULL;
-
for (i = 0; i < dev->n_targets; i++) {
if (dev->targets[i].idx == target_idx)
return &dev->targets[i];
@@ -546,9 +543,9 @@ error:
struct nfc_se *nfc_find_se(struct nfc_dev *dev, u32 se_idx)
{
- struct nfc_se *se, *n;
+ struct nfc_se *se;
- list_for_each_entry_safe(se, n, &dev->secure_elements, list)
+ list_for_each_entry(se, &dev->secure_elements, list)
if (se->idx == se_idx)
return se;
@@ -655,9 +652,6 @@ int nfc_set_remote_general_bytes(struct nfc_dev *dev, u8 *gb, u8 gb_len)
{
pr_debug("dev_name=%s gb_len=%d\n", dev_name(&dev->dev), gb_len);
- if (gb_len > NFC_MAX_GT_LEN)
- return -EINVAL;
-
return nfc_llcp_set_remote_gb(dev, gb, gb_len);
}
EXPORT_SYMBOL(nfc_set_remote_general_bytes);
diff --git a/net/nfc/digital.h b/net/nfc/digital.h
index 08b29b55ea63..3759add68b1b 100644
--- a/net/nfc/digital.h
+++ b/net/nfc/digital.h
@@ -72,6 +72,12 @@ void digital_poll_next_tech(struct nfc_digital_dev *ddev);
int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech);
int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech);
+int digital_in_send_iso15693_inv_req(struct nfc_digital_dev *ddev, u8 rf_tech);
+
+int digital_in_iso_dep_pull_sod(struct nfc_digital_dev *ddev,
+ struct sk_buff *skb);
+int digital_in_iso_dep_push_sod(struct nfc_digital_dev *ddev,
+ struct sk_buff *skb);
int digital_target_found(struct nfc_digital_dev *ddev,
struct nfc_target *target, u8 protocol);
diff --git a/net/nfc/digital_core.c b/net/nfc/digital_core.c
index c129d1571ca6..e01e15dbf1ab 100644
--- a/net/nfc/digital_core.c
+++ b/net/nfc/digital_core.c
@@ -25,6 +25,8 @@
#define DIGITAL_PROTO_NFCF_RF_TECH \
(NFC_PROTO_FELICA_MASK | NFC_PROTO_NFC_DEP_MASK)
+#define DIGITAL_PROTO_ISO15693_RF_TECH NFC_PROTO_ISO15693_MASK
+
struct digital_cmd {
struct list_head queue;
@@ -331,6 +333,18 @@ int digital_target_found(struct nfc_digital_dev *ddev,
}
break;
+ case NFC_PROTO_ISO15693:
+ framing = NFC_DIGITAL_FRAMING_ISO15693_T5T;
+ check_crc = digital_skb_check_crc_b;
+ add_crc = digital_skb_add_crc_b;
+ break;
+
+ case NFC_PROTO_ISO14443:
+ framing = NFC_DIGITAL_FRAMING_NFCA_T4T;
+ check_crc = digital_skb_check_crc_a;
+ add_crc = digital_skb_add_crc_a;
+ break;
+
default:
pr_err("Invalid protocol %d\n", protocol);
return -EINVAL;
@@ -461,7 +475,7 @@ static int digital_start_poll(struct nfc_dev *nfc_dev, __u32 im_protocols,
digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_106A,
digital_in_send_sens_req);
- if (im_protocols & DIGITAL_PROTO_NFCF_RF_TECH) {
+ if (matching_im_protocols & DIGITAL_PROTO_NFCF_RF_TECH) {
digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_212F,
digital_in_send_sensf_req);
@@ -469,7 +483,11 @@ static int digital_start_poll(struct nfc_dev *nfc_dev, __u32 im_protocols,
digital_in_send_sensf_req);
}
- if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) {
+ if (matching_im_protocols & DIGITAL_PROTO_ISO15693_RF_TECH)
+ digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_ISO15693,
+ digital_in_send_iso15693_inv_req);
+
+ if (matching_tm_protocols & NFC_PROTO_NFC_DEP_MASK) {
if (ddev->ops->tg_listen_mdaa) {
digital_add_poll_tech(ddev, 0,
digital_tg_listen_mdaa);
@@ -607,20 +625,30 @@ static void digital_in_send_complete(struct nfc_digital_dev *ddev, void *arg,
if (IS_ERR(resp)) {
rc = PTR_ERR(resp);
+ resp = NULL;
goto done;
}
- if (ddev->curr_protocol == NFC_PROTO_MIFARE)
+ if (ddev->curr_protocol == NFC_PROTO_MIFARE) {
rc = digital_in_recv_mifare_res(resp);
- else
- rc = ddev->skb_check_crc(resp);
+ /* crc check is done in digital_in_recv_mifare_res() */
+ goto done;
+ }
+ if (ddev->curr_protocol == NFC_PROTO_ISO14443) {
+ rc = digital_in_iso_dep_pull_sod(ddev, resp);
+ if (rc)
+ goto done;
+ }
+
+ rc = ddev->skb_check_crc(resp);
+
+done:
if (rc) {
kfree_skb(resp);
resp = NULL;
}
-done:
data_exch->cb(data_exch->cb_context, resp, rc);
kfree(data_exch);
@@ -632,6 +660,7 @@ static int digital_in_send(struct nfc_dev *nfc_dev, struct nfc_target *target,
{
struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
struct digital_data_exch *data_exch;
+ int rc;
data_exch = kzalloc(sizeof(struct digital_data_exch), GFP_KERNEL);
if (!data_exch) {
@@ -642,13 +671,27 @@ static int digital_in_send(struct nfc_dev *nfc_dev, struct nfc_target *target,
data_exch->cb = cb;
data_exch->cb_context = cb_context;
- if (ddev->curr_protocol == NFC_PROTO_NFC_DEP)
- return digital_in_send_dep_req(ddev, target, skb, data_exch);
+ if (ddev->curr_protocol == NFC_PROTO_NFC_DEP) {
+ rc = digital_in_send_dep_req(ddev, target, skb, data_exch);
+ goto exit;
+ }
+
+ if (ddev->curr_protocol == NFC_PROTO_ISO14443) {
+ rc = digital_in_iso_dep_push_sod(ddev, skb);
+ if (rc)
+ goto exit;
+ }
ddev->skb_add_crc(skb);
- return digital_in_send_cmd(ddev, skb, 500, digital_in_send_complete,
- data_exch);
+ rc = digital_in_send_cmd(ddev, skb, 500, digital_in_send_complete,
+ data_exch);
+
+exit:
+ if (rc)
+ kfree(data_exch);
+
+ return rc;
}
static struct nfc_ops digital_nfc_ops = {
@@ -700,6 +743,10 @@ struct nfc_digital_dev *nfc_digital_allocate_device(struct nfc_digital_ops *ops,
ddev->protocols |= NFC_PROTO_FELICA_MASK;
if (supported_protocols & NFC_PROTO_NFC_DEP_MASK)
ddev->protocols |= NFC_PROTO_NFC_DEP_MASK;
+ if (supported_protocols & NFC_PROTO_ISO15693_MASK)
+ ddev->protocols |= NFC_PROTO_ISO15693_MASK;
+ if (supported_protocols & NFC_PROTO_ISO14443_MASK)
+ ddev->protocols |= NFC_PROTO_ISO14443_MASK;
ddev->tx_headroom = tx_headroom + DIGITAL_MAX_HEADER_LEN;
ddev->tx_tailroom = tx_tailroom + DIGITAL_CRC_LEN;
diff --git a/net/nfc/digital_technology.c b/net/nfc/digital_technology.c
index 251c8c753ebe..278c3fed27e0 100644
--- a/net/nfc/digital_technology.c
+++ b/net/nfc/digital_technology.c
@@ -30,6 +30,7 @@
#define DIGITAL_SEL_RES_NFCID1_COMPLETE(sel_res) (!((sel_res) & 0x04))
#define DIGITAL_SEL_RES_IS_T2T(sel_res) (!((sel_res) & 0x60))
+#define DIGITAL_SEL_RES_IS_T4T(sel_res) ((sel_res) & 0x20)
#define DIGITAL_SEL_RES_IS_NFC_DEP(sel_res) ((sel_res) & 0x40)
#define DIGITAL_SENS_RES_IS_T1T(sens_res) (((sens_res) & 0x0C00) == 0x0C00)
@@ -51,6 +52,34 @@
#define DIGITAL_SENSF_REQ_RC_SC 1
#define DIGITAL_SENSF_REQ_RC_AP 2
+#define DIGITAL_CMD_ISO15693_INVENTORY_REQ 0x01
+
+#define DIGITAL_ISO15693_REQ_FLAG_DATA_RATE BIT(1)
+#define DIGITAL_ISO15693_REQ_FLAG_INVENTORY BIT(2)
+#define DIGITAL_ISO15693_REQ_FLAG_NB_SLOTS BIT(5)
+#define DIGITAL_ISO15693_RES_FLAG_ERROR BIT(0)
+#define DIGITAL_ISO15693_RES_IS_VALID(flags) \
+ (!((flags) & DIGITAL_ISO15693_RES_FLAG_ERROR))
+
+#define DIGITAL_ISO_DEP_I_PCB 0x02
+#define DIGITAL_ISO_DEP_PNI(pni) ((pni) & 0x01)
+
+#define DIGITAL_ISO_DEP_PCB_TYPE(pcb) ((pcb) & 0xC0)
+
+#define DIGITAL_ISO_DEP_I_BLOCK 0x00
+
+#define DIGITAL_ISO_DEP_BLOCK_HAS_DID(pcb) ((pcb) & 0x08)
+
+static const u8 digital_ats_fsc[] = {
+ 16, 24, 32, 40, 48, 64, 96, 128,
+};
+
+#define DIGITAL_ATS_FSCI(t0) ((t0) & 0x0F)
+#define DIGITAL_ATS_MAX_FSC 256
+
+#define DIGITAL_RATS_BYTE1 0xE0
+#define DIGITAL_RATS_PARAM 0x80
+
struct digital_sdd_res {
u8 nfcid1[4];
u8 bcc;
@@ -82,9 +111,127 @@ struct digital_sensf_res {
u8 rd[2];
} __packed;
+struct digital_iso15693_inv_req {
+ u8 flags;
+ u8 cmd;
+ u8 mask_len;
+ u64 mask;
+} __packed;
+
+struct digital_iso15693_inv_res {
+ u8 flags;
+ u8 dsfid;
+ u64 uid;
+} __packed;
+
static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev,
struct nfc_target *target);
+int digital_in_iso_dep_pull_sod(struct nfc_digital_dev *ddev,
+ struct sk_buff *skb)
+{
+ u8 pcb;
+ u8 block_type;
+
+ if (skb->len < 1)
+ return -EIO;
+
+ pcb = *skb->data;
+ block_type = DIGITAL_ISO_DEP_PCB_TYPE(pcb);
+
+ /* No support fo R-block nor S-block */
+ if (block_type != DIGITAL_ISO_DEP_I_BLOCK) {
+ pr_err("ISO_DEP R-block and S-block not supported\n");
+ return -EIO;
+ }
+
+ if (DIGITAL_ISO_DEP_BLOCK_HAS_DID(pcb)) {
+ pr_err("DID field in ISO_DEP PCB not supported\n");
+ return -EIO;
+ }
+
+ skb_pull(skb, 1);
+
+ return 0;
+}
+
+int digital_in_iso_dep_push_sod(struct nfc_digital_dev *ddev,
+ struct sk_buff *skb)
+{
+ /*
+ * Chaining not supported so skb->len + 1 PCB byte + 2 CRC bytes must
+ * not be greater than remote FSC
+ */
+ if (skb->len + 3 > ddev->target_fsc)
+ return -EIO;
+
+ skb_push(skb, 1);
+
+ *skb->data = DIGITAL_ISO_DEP_I_PCB | ddev->curr_nfc_dep_pni;
+
+ ddev->curr_nfc_dep_pni =
+ DIGITAL_ISO_DEP_PNI(ddev->curr_nfc_dep_pni + 1);
+
+ return 0;
+}
+
+static void digital_in_recv_ats(struct nfc_digital_dev *ddev, void *arg,
+ struct sk_buff *resp)
+{
+ struct nfc_target *target = arg;
+ u8 fsdi;
+ int rc;
+
+ if (IS_ERR(resp)) {
+ rc = PTR_ERR(resp);
+ resp = NULL;
+ goto exit;
+ }
+
+ if (resp->len < 2) {
+ rc = -EIO;
+ goto exit;
+ }
+
+ fsdi = DIGITAL_ATS_FSCI(resp->data[1]);
+ if (fsdi >= 8)
+ ddev->target_fsc = DIGITAL_ATS_MAX_FSC;
+ else
+ ddev->target_fsc = digital_ats_fsc[fsdi];
+
+ ddev->curr_nfc_dep_pni = 0;
+
+ rc = digital_target_found(ddev, target, NFC_PROTO_ISO14443);
+
+exit:
+ dev_kfree_skb(resp);
+ kfree(target);
+
+ if (rc)
+ digital_poll_next_tech(ddev);
+}
+
+static int digital_in_send_rats(struct nfc_digital_dev *ddev,
+ struct nfc_target *target)
+{
+ int rc;
+ struct sk_buff *skb;
+
+ skb = digital_skb_alloc(ddev, 2);
+ if (!skb)
+ return -ENOMEM;
+
+ *skb_put(skb, 1) = DIGITAL_RATS_BYTE1;
+ *skb_put(skb, 1) = DIGITAL_RATS_PARAM;
+
+ rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_ats,
+ target);
+ if (rc)
+ kfree_skb(skb);
+
+ return rc;
+}
+
static void digital_in_recv_sel_res(struct nfc_digital_dev *ddev, void *arg,
struct sk_buff *resp)
{
@@ -122,8 +269,19 @@ static void digital_in_recv_sel_res(struct nfc_digital_dev *ddev, void *arg,
goto exit_free_skb;
}
+ target->sel_res = sel_res;
+
if (DIGITAL_SEL_RES_IS_T2T(sel_res)) {
nfc_proto = NFC_PROTO_MIFARE;
+ } else if (DIGITAL_SEL_RES_IS_T4T(sel_res)) {
+ rc = digital_in_send_rats(ddev, target);
+ if (rc)
+ goto exit;
+ /*
+ * Skip target_found and don't free it for now. This will be
+ * done when receiving the ATS
+ */
+ goto exit_free_skb;
} else if (DIGITAL_SEL_RES_IS_NFC_DEP(sel_res)) {
nfc_proto = NFC_PROTO_NFC_DEP;
} else {
@@ -131,8 +289,6 @@ static void digital_in_recv_sel_res(struct nfc_digital_dev *ddev, void *arg,
goto exit;
}
- target->sel_res = sel_res;
-
rc = digital_target_found(ddev, target, nfc_proto);
exit:
@@ -473,6 +629,93 @@ int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech)
return rc;
}
+static void digital_in_recv_iso15693_inv_res(struct nfc_digital_dev *ddev,
+ void *arg, struct sk_buff *resp)
+{
+ struct digital_iso15693_inv_res *res;
+ struct nfc_target *target = NULL;
+ int rc;
+
+ if (IS_ERR(resp)) {
+ rc = PTR_ERR(resp);
+ resp = NULL;
+ goto out_free_skb;
+ }
+
+ if (resp->len != sizeof(*res)) {
+ rc = -EIO;
+ goto out_free_skb;
+ }
+
+ res = (struct digital_iso15693_inv_res *)resp->data;
+
+ if (!DIGITAL_ISO15693_RES_IS_VALID(res->flags)) {
+ PROTOCOL_ERR("ISO15693 - 10.3.1");
+ rc = -EINVAL;
+ goto out_free_skb;
+ }
+
+ target = kzalloc(sizeof(*target), GFP_KERNEL);
+ if (!target) {
+ rc = -ENOMEM;
+ goto out_free_skb;
+ }
+
+ target->is_iso15693 = 1;
+ target->iso15693_dsfid = res->dsfid;
+ memcpy(target->iso15693_uid, &res->uid, sizeof(target->iso15693_uid));
+
+ rc = digital_target_found(ddev, target, NFC_PROTO_ISO15693);
+
+ kfree(target);
+
+out_free_skb:
+ dev_kfree_skb(resp);
+
+ if (rc)
+ digital_poll_next_tech(ddev);
+}
+
+int digital_in_send_iso15693_inv_req(struct nfc_digital_dev *ddev, u8 rf_tech)
+{
+ struct digital_iso15693_inv_req *req;
+ struct sk_buff *skb;
+ int rc;
+
+ rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
+ NFC_DIGITAL_RF_TECH_ISO15693);
+ if (rc)
+ return rc;
+
+ rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
+ NFC_DIGITAL_FRAMING_ISO15693_INVENTORY);
+ if (rc)
+ return rc;
+
+ skb = digital_skb_alloc(ddev, sizeof(*req));
+ if (!skb)
+ return -ENOMEM;
+
+ skb_put(skb, sizeof(*req) - sizeof(req->mask)); /* No mask */
+ req = (struct digital_iso15693_inv_req *)skb->data;
+
+ /* Single sub-carrier, high data rate, no AFI, single slot
+ * Inventory command
+ */
+ req->flags = DIGITAL_ISO15693_REQ_FLAG_DATA_RATE |
+ DIGITAL_ISO15693_REQ_FLAG_INVENTORY |
+ DIGITAL_ISO15693_REQ_FLAG_NB_SLOTS;
+ req->cmd = DIGITAL_CMD_ISO15693_INVENTORY_REQ;
+ req->mask_len = 0;
+
+ rc = digital_in_send_cmd(ddev, skb, 30,
+ digital_in_recv_iso15693_inv_res, NULL);
+ if (rc)
+ kfree_skb(skb);
+
+ return rc;
+}
+
static int digital_tg_send_sel_res(struct nfc_digital_dev *ddev)
{
struct sk_buff *skb;
diff --git a/net/nfc/hci/llc.c b/net/nfc/hci/llc.c
index a07d2b818487..1b90c0531852 100644
--- a/net/nfc/hci/llc.c
+++ b/net/nfc/hci/llc.c
@@ -20,14 +20,12 @@
#include "llc.h"
-static struct list_head llc_engines;
+static LIST_HEAD(llc_engines);
int nfc_llc_init(void)
{
int r;
- INIT_LIST_HEAD(&llc_engines);
-
r = nfc_llc_nop_register();
if (r)
goto exit;
diff --git a/net/nfc/llcp_core.c b/net/nfc/llcp_core.c
index 6184bd1fba3a..b486f12ae243 100644
--- a/net/nfc/llcp_core.c
+++ b/net/nfc/llcp_core.c
@@ -27,7 +27,7 @@
static u8 llcp_magic[3] = {0x46, 0x66, 0x6d};
-static struct list_head llcp_devices;
+static LIST_HEAD(llcp_devices);
static void nfc_llcp_rx_skb(struct nfc_llcp_local *local, struct sk_buff *skb);
@@ -293,9 +293,9 @@ static void nfc_llcp_sdreq_timer(unsigned long data)
struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev)
{
- struct nfc_llcp_local *local, *n;
+ struct nfc_llcp_local *local;
- list_for_each_entry_safe(local, n, &llcp_devices, list)
+ list_for_each_entry(local, &llcp_devices, list)
if (local->dev == dev)
return local;
@@ -609,14 +609,16 @@ u8 *nfc_llcp_general_bytes(struct nfc_dev *dev, size_t *general_bytes_len)
int nfc_llcp_set_remote_gb(struct nfc_dev *dev, u8 *gb, u8 gb_len)
{
- struct nfc_llcp_local *local = nfc_llcp_find_local(dev);
+ struct nfc_llcp_local *local;
+
+ if (gb_len < 3 || gb_len > NFC_MAX_GT_LEN)
+ return -EINVAL;
+ local = nfc_llcp_find_local(dev);
if (local == NULL) {
pr_err("No LLCP device\n");
return -ENODEV;
}
- if (gb_len < 3)
- return -EINVAL;
memset(local->remote_gb, 0, NFC_MAX_GT_LEN);
memcpy(local->remote_gb, gb, gb_len);
@@ -1622,8 +1624,6 @@ void nfc_llcp_unregister_device(struct nfc_dev *dev)
int __init nfc_llcp_init(void)
{
- INIT_LIST_HEAD(&llcp_devices);
-
return nfc_llcp_sock_init();
}
diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c
index 56db888b1cd5..6c34ac978501 100644
--- a/net/nfc/nci/core.c
+++ b/net/nfc/nci/core.c
@@ -74,7 +74,7 @@ static int __nci_request(struct nci_dev *ndev,
ndev->req_status = NCI_REQ_PEND;
- init_completion(&ndev->req_completion);
+ reinit_completion(&ndev->req_completion);
req(ndev, opt);
completion_rc =
wait_for_completion_interruptible_timeout(&ndev->req_completion,
@@ -709,6 +709,7 @@ struct nci_dev *nci_allocate_device(struct nci_ops *ops,
ndev->ops = ops;
ndev->tx_headroom = tx_headroom;
ndev->tx_tailroom = tx_tailroom;
+ init_completion(&ndev->req_completion);
ndev->nfc_dev = nfc_allocate_device(&nci_nfc_ops,
supported_protocols,
diff --git a/net/nfc/nci/spi.c b/net/nfc/nci/spi.c
index f1d426f10cce..ec250e77763a 100644
--- a/net/nfc/nci/spi.c
+++ b/net/nfc/nci/spi.c
@@ -105,7 +105,7 @@ int nci_spi_send(struct nci_spi *nspi,
if (ret != 0 || nspi->acknowledge_mode == NCI_SPI_CRC_DISABLED)
goto done;
- init_completion(&nspi->req_completion);
+ reinit_completion(&nspi->req_completion);
completion_rc = wait_for_completion_interruptible_timeout(
&nspi->req_completion,
NCI_SPI_SEND_TIMEOUT);
@@ -145,6 +145,7 @@ struct nci_spi *nci_spi_allocate_spi(struct spi_device *spi,
nspi->spi = spi;
nspi->ndev = ndev;
+ init_completion(&nspi->req_completion);
return nspi;
}
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index ebbf6fb88b35..43cb1c17e267 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -94,6 +94,14 @@ static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
target->sensf_res))
goto nla_put_failure;
+ if (target->is_iso15693) {
+ if (nla_put_u8(msg, NFC_ATTR_TARGET_ISO15693_DSFID,
+ target->iso15693_dsfid) ||
+ nla_put(msg, NFC_ATTR_TARGET_ISO15693_UID,
+ sizeof(target->iso15693_uid), target->iso15693_uid))
+ goto nla_put_failure;
+ }
+
return genlmsg_end(msg, hdr);
nla_put_failure:
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-12 06:29:03 +0000