From 9f7b57f28cb7513d3245e74cd7536304306d1cc0 Mon Sep 17 00:00:00 2001 From: Thierry Escande Date: Fri, 4 Oct 2013 12:12:02 +0200 Subject: [PATCH] NFC: port100: Add initiator mode support This patch implements the initiator NFC operations in_configure_hw() and in_send_cmd(). It also implements the switch_rf() operation. The initiator mode supports NFC-A technology at 106kbits/s and NFC-F technologies at 212 and 424kbits/s. Signed-off-by: Thierry Escande Cc: Stephen Tiedemann Tested-by: Cho, Yu-Chen Signed-off-by: Samuel Ortiz --- drivers/nfc/port100.c | 366 +++++++++++++++++++++++++++++++++++++++++- 1 file changed, 363 insertions(+), 3 deletions(-) diff --git a/drivers/nfc/port100.c b/drivers/nfc/port100.c index 251a2c112299..99a6dd79393d 100644 --- a/drivers/nfc/port100.c +++ b/drivers/nfc/port100.c @@ -71,6 +71,12 @@ static u8 ack_frame[PORT100_FRAME_ACK_SIZE] = { #define PORT100_CMD_GET_COMMAND_TYPE 0x28 #define PORT100_CMD_SET_COMMAND_TYPE 0x2A +#define PORT100_CMD_IN_SET_RF 0x00 +#define PORT100_CMD_IN_SET_PROTOCOL 0x02 +#define PORT100_CMD_IN_COMM_RF 0x04 + +#define PORT100_CMD_SWITCH_RF 0x06 + #define PORT100_CMD_RESPONSE(cmd) (cmd + 1) #define PORT100_CMD_TYPE_IS_SUPPORTED(mask, cmd_type) \ @@ -78,11 +84,204 @@ static u8 ack_frame[PORT100_FRAME_ACK_SIZE] = { #define PORT100_CMD_TYPE_0 0 #define PORT100_CMD_TYPE_1 1 +#define PORT100_CMD_STATUS_OK 0x00 +#define PORT100_CMD_STATUS_TIMEOUT 0x80 + struct port100; typedef void (*port100_send_async_complete_t)(struct port100 *dev, void *arg, struct sk_buff *resp); +/** + * Setting sets structure for in_set_rf command + * + * @in_*_set_number: Represent the entry indexes in the port-100 RF Base Table. + * This table contains multiple RF setting sets required for RF + * communication. + * + * @in_*_comm_type: Theses fields set the communication type to be used. + */ +struct port100_in_rf_setting { + u8 in_send_set_number; + u8 in_send_comm_type; + u8 in_recv_set_number; + u8 in_recv_comm_type; +} __packed; + +#define PORT100_COMM_TYPE_IN_212F 0x01 +#define PORT100_COMM_TYPE_IN_424F 0x02 +#define PORT100_COMM_TYPE_IN_106A 0x03 + +static const struct port100_in_rf_setting in_rf_settings[] = { + [NFC_DIGITAL_RF_TECH_212F] = { + .in_send_set_number = 1, + .in_send_comm_type = PORT100_COMM_TYPE_IN_212F, + .in_recv_set_number = 15, + .in_recv_comm_type = PORT100_COMM_TYPE_IN_212F, + }, + [NFC_DIGITAL_RF_TECH_424F] = { + .in_send_set_number = 1, + .in_send_comm_type = PORT100_COMM_TYPE_IN_424F, + .in_recv_set_number = 15, + .in_recv_comm_type = PORT100_COMM_TYPE_IN_424F, + }, + [NFC_DIGITAL_RF_TECH_106A] = { + .in_send_set_number = 2, + .in_send_comm_type = PORT100_COMM_TYPE_IN_106A, + .in_recv_set_number = 15, + .in_recv_comm_type = PORT100_COMM_TYPE_IN_106A, + }, +}; + +#define PORT100_IN_PROT_INITIAL_GUARD_TIME 0x00 +#define PORT100_IN_PROT_ADD_CRC 0x01 +#define PORT100_IN_PROT_CHECK_CRC 0x02 +#define PORT100_IN_PROT_MULTI_CARD 0x03 +#define PORT100_IN_PROT_ADD_PARITY 0x04 +#define PORT100_IN_PROT_CHECK_PARITY 0x05 +#define PORT100_IN_PROT_BITWISE_AC_RECV_MODE 0x06 +#define PORT100_IN_PROT_VALID_BIT_NUMBER 0x07 +#define PORT100_IN_PROT_CRYPTO1 0x08 +#define PORT100_IN_PROT_ADD_SOF 0x09 +#define PORT100_IN_PROT_CHECK_SOF 0x0A +#define PORT100_IN_PROT_ADD_EOF 0x0B +#define PORT100_IN_PROT_CHECK_EOF 0x0C +#define PORT100_IN_PROT_DEAF_TIME 0x0E +#define PORT100_IN_PROT_CRM 0x0F +#define PORT100_IN_PROT_CRM_MIN_LEN 0x10 +#define PORT100_IN_PROT_T1_TAG_FRAME 0x11 +#define PORT100_IN_PROT_RFCA 0x12 +#define PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR 0x13 +#define PORT100_IN_PROT_END 0x14 + +#define PORT100_IN_MAX_NUM_PROTOCOLS 19 + +struct port100_protocol { + u8 number; + u8 value; +} __packed; + +static struct port100_protocol +in_protocols[][PORT100_IN_MAX_NUM_PROTOCOLS + 1] = { + [NFC_DIGITAL_FRAMING_NFCA_SHORT] = { + { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 }, + { PORT100_IN_PROT_ADD_CRC, 0 }, + { PORT100_IN_PROT_CHECK_CRC, 0 }, + { PORT100_IN_PROT_MULTI_CARD, 0 }, + { PORT100_IN_PROT_ADD_PARITY, 0 }, + { PORT100_IN_PROT_CHECK_PARITY, 1 }, + { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, + { PORT100_IN_PROT_VALID_BIT_NUMBER, 7 }, + { PORT100_IN_PROT_CRYPTO1, 0 }, + { PORT100_IN_PROT_ADD_SOF, 0 }, + { PORT100_IN_PROT_CHECK_SOF, 0 }, + { PORT100_IN_PROT_ADD_EOF, 0 }, + { PORT100_IN_PROT_CHECK_EOF, 0 }, + { PORT100_IN_PROT_DEAF_TIME, 4 }, + { PORT100_IN_PROT_CRM, 0 }, + { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, + { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, + { PORT100_IN_PROT_RFCA, 0 }, + { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, + { PORT100_IN_PROT_END, 0 }, + }, + [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = { + { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 }, + { PORT100_IN_PROT_ADD_CRC, 0 }, + { PORT100_IN_PROT_CHECK_CRC, 0 }, + { PORT100_IN_PROT_MULTI_CARD, 0 }, + { PORT100_IN_PROT_ADD_PARITY, 1 }, + { PORT100_IN_PROT_CHECK_PARITY, 1 }, + { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, + { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, + { PORT100_IN_PROT_CRYPTO1, 0 }, + { PORT100_IN_PROT_ADD_SOF, 0 }, + { PORT100_IN_PROT_CHECK_SOF, 0 }, + { PORT100_IN_PROT_ADD_EOF, 0 }, + { PORT100_IN_PROT_CHECK_EOF, 0 }, + { PORT100_IN_PROT_DEAF_TIME, 4 }, + { PORT100_IN_PROT_CRM, 0 }, + { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, + { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, + { PORT100_IN_PROT_RFCA, 0 }, + { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, + { PORT100_IN_PROT_END, 0 }, + }, + [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = { + { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 }, + { PORT100_IN_PROT_ADD_CRC, 1 }, + { PORT100_IN_PROT_CHECK_CRC, 1 }, + { PORT100_IN_PROT_MULTI_CARD, 0 }, + { PORT100_IN_PROT_ADD_PARITY, 1 }, + { PORT100_IN_PROT_CHECK_PARITY, 1 }, + { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, + { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, + { PORT100_IN_PROT_CRYPTO1, 0 }, + { PORT100_IN_PROT_ADD_SOF, 0 }, + { PORT100_IN_PROT_CHECK_SOF, 0 }, + { PORT100_IN_PROT_ADD_EOF, 0 }, + { PORT100_IN_PROT_CHECK_EOF, 0 }, + { PORT100_IN_PROT_DEAF_TIME, 4 }, + { PORT100_IN_PROT_CRM, 0 }, + { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, + { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, + { PORT100_IN_PROT_RFCA, 0 }, + { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, + { PORT100_IN_PROT_END, 0 }, + }, + [NFC_DIGITAL_FRAMING_NFCA_T1T] = { + /* nfc_digital_framing_nfca_short */ + { PORT100_IN_PROT_ADD_CRC, 2 }, + { PORT100_IN_PROT_CHECK_CRC, 2 }, + { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, + { PORT100_IN_PROT_T1_TAG_FRAME, 2 }, + { PORT100_IN_PROT_END, 0 }, + }, + [NFC_DIGITAL_FRAMING_NFCA_T2T] = { + /* nfc_digital_framing_nfca_standard */ + { PORT100_IN_PROT_ADD_CRC, 1 }, + { PORT100_IN_PROT_CHECK_CRC, 0 }, + { PORT100_IN_PROT_END, 0 }, + }, + [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = { + /* nfc_digital_framing_nfca_standard */ + { PORT100_IN_PROT_END, 0 }, + }, + [NFC_DIGITAL_FRAMING_NFCF] = { + { PORT100_IN_PROT_INITIAL_GUARD_TIME, 18 }, + { PORT100_IN_PROT_ADD_CRC, 1 }, + { PORT100_IN_PROT_CHECK_CRC, 1 }, + { PORT100_IN_PROT_MULTI_CARD, 0 }, + { PORT100_IN_PROT_ADD_PARITY, 0 }, + { PORT100_IN_PROT_CHECK_PARITY, 0 }, + { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, + { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, + { PORT100_IN_PROT_CRYPTO1, 0 }, + { PORT100_IN_PROT_ADD_SOF, 0 }, + { PORT100_IN_PROT_CHECK_SOF, 0 }, + { PORT100_IN_PROT_ADD_EOF, 0 }, + { PORT100_IN_PROT_CHECK_EOF, 0 }, + { PORT100_IN_PROT_DEAF_TIME, 4 }, + { PORT100_IN_PROT_CRM, 0 }, + { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, + { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, + { PORT100_IN_PROT_RFCA, 0 }, + { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, + { PORT100_IN_PROT_END, 0 }, + }, + [NFC_DIGITAL_FRAMING_NFCF_T3T] = { + /* nfc_digital_framing_nfcf */ + { PORT100_IN_PROT_END, 0 }, + }, + [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = { + /* nfc_digital_framing_nfcf */ + { PORT100_IN_PROT_END, 0 }, + }, + [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = { + { PORT100_IN_PROT_END, 0 }, + }, +}; + struct port100 { struct nfc_digital_dev *nfc_digital_dev; @@ -626,20 +825,181 @@ static u16 port100_get_firmware_version(struct port100 *dev) static int port100_switch_rf(struct nfc_digital_dev *ddev, bool on) { - return -EOPNOTSUPP; + struct port100 *dev = nfc_digital_get_drvdata(ddev); + struct sk_buff *skb, *resp; + + skb = port100_alloc_skb(dev, 1); + if (!skb) + return -ENOMEM; + + *skb_put(skb, 1) = on ? 1 : 0; + + resp = port100_send_cmd_sync(dev, PORT100_CMD_SWITCH_RF, skb); + + if (IS_ERR(resp)) + return PTR_ERR(resp); + + dev_kfree_skb(resp); + + return 0; +} + +static int port100_in_set_rf(struct nfc_digital_dev *ddev, u8 rf) +{ + struct port100 *dev = nfc_digital_get_drvdata(ddev); + struct sk_buff *skb; + struct sk_buff *resp; + int rc; + + if (rf >= NFC_DIGITAL_RF_TECH_LAST) + return -EINVAL; + + skb = port100_alloc_skb(dev, sizeof(struct port100_in_rf_setting)); + if (!skb) + return -ENOMEM; + + memcpy(skb_put(skb, sizeof(struct port100_in_rf_setting)), + &in_rf_settings[rf], + sizeof(struct port100_in_rf_setting)); + + resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_RF, skb); + + if (IS_ERR(resp)) + return PTR_ERR(resp); + + rc = resp->data[0]; + + dev_kfree_skb(resp); + + return rc; +} + +static int port100_in_set_framing(struct nfc_digital_dev *ddev, int param) +{ + struct port100 *dev = nfc_digital_get_drvdata(ddev); + struct port100_protocol *protocols; + struct sk_buff *skb; + struct sk_buff *resp; + int num_protocols; + size_t size; + int rc; + + if (param >= NFC_DIGITAL_FRAMING_LAST) + return -EINVAL; + + protocols = in_protocols[param]; + + num_protocols = 0; + while (protocols[num_protocols].number != PORT100_IN_PROT_END) + num_protocols++; + + if (!num_protocols) + return 0; + + size = sizeof(struct port100_protocol) * num_protocols; + + skb = port100_alloc_skb(dev, size); + if (!skb) + return -ENOMEM; + + memcpy(skb_put(skb, size), protocols, size); + + resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_PROTOCOL, skb); + + if (IS_ERR(resp)) + return PTR_ERR(resp); + + rc = resp->data[0]; + + dev_kfree_skb(resp); + + return rc; } static int port100_in_configure_hw(struct nfc_digital_dev *ddev, int type, int param) { - return -EOPNOTSUPP; + if (type == NFC_DIGITAL_CONFIG_RF_TECH) + return port100_in_set_rf(ddev, param); + + if (type == NFC_DIGITAL_CONFIG_FRAMING) + return port100_in_set_framing(ddev, param); + + return -EINVAL; +} + +static void port100_in_comm_rf_complete(struct port100 *dev, void *arg, + struct sk_buff *resp) +{ + struct port100_cb_arg *cb_arg = arg; + nfc_digital_cmd_complete_t cb = cb_arg->complete_cb; + u32 status; + int rc; + + if (IS_ERR(resp)) { + rc = PTR_ERR(resp); + goto exit; + } + + if (resp->len < 4) { + nfc_err(&dev->interface->dev, + "Invalid packet length received.\n"); + rc = -EIO; + goto error; + } + + status = le32_to_cpu(*(__le32 *)resp->data); + + skb_pull(resp, sizeof(u32)); + + if (status == PORT100_CMD_STATUS_TIMEOUT) { + rc = -ETIMEDOUT; + goto error; + } + + if (status != PORT100_CMD_STATUS_OK) { + nfc_err(&dev->interface->dev, + "in_comm_rf failed with status 0x%08x\n", status); + rc = -EIO; + goto error; + } + + /* Remove collision bits byte */ + skb_pull(resp, 1); + + goto exit; + +error: + kfree_skb(resp); + resp = ERR_PTR(rc); + +exit: + cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp); + + kfree(cb_arg); } static int port100_in_send_cmd(struct nfc_digital_dev *ddev, struct sk_buff *skb, u16 _timeout, nfc_digital_cmd_complete_t cb, void *arg) { - return -EOPNOTSUPP; + struct port100 *dev = nfc_digital_get_drvdata(ddev); + struct port100_cb_arg *cb_arg; + __le16 timeout; + + cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL); + if (!cb_arg) + return -ENOMEM; + + cb_arg->complete_cb = cb; + cb_arg->complete_arg = arg; + + timeout = cpu_to_le16(_timeout * 10); + + memcpy(skb_push(skb, sizeof(__le16)), &timeout, sizeof(__le16)); + + return port100_send_cmd_async(dev, PORT100_CMD_IN_COMM_RF, skb, + port100_in_comm_rf_complete, cb_arg); } static int port100_tg_configure_hw(struct nfc_digital_dev *ddev, int type,